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annotate libiberty/functions.texi @ 158:494b0b89df80 default tip
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author | Shinji KONO <kono@ie.u-ryukyu.ac.jp> |
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date | Mon, 25 May 2020 18:13:55 +0900 |
parents | 1830386684a0 |
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rev | line source |
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0 | 1 @c Automatically generated from *.c and others (the comments before |
2 @c each entry tell you which file and where in that file). DO NOT EDIT! | |
3 @c Edit the *.c files, configure with --enable-maintainer-mode, | |
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4 @c run 'make stamp-functions' and gather-docs will build a new copy. |
0 | 5 |
6 @c alloca.c:26 | |
7 @deftypefn Replacement void* alloca (size_t @var{size}) | |
8 | |
9 This function allocates memory which will be automatically reclaimed | |
10 after the procedure exits. The @libib{} implementation does not free | |
11 the memory immediately but will do so eventually during subsequent | |
12 calls to this function. Memory is allocated using @code{xmalloc} under | |
13 normal circumstances. | |
14 | |
15 The header file @file{alloca-conf.h} can be used in conjunction with the | |
16 GNU Autoconf test @code{AC_FUNC_ALLOCA} to test for and properly make | |
17 available this function. The @code{AC_FUNC_ALLOCA} test requires that | |
18 client code use a block of preprocessor code to be safe (see the Autoconf | |
19 manual for more); this header incorporates that logic and more, including | |
20 the possibility of a GCC built-in function. | |
21 | |
22 @end deftypefn | |
23 | |
24 @c asprintf.c:32 | |
25 @deftypefn Extension int asprintf (char **@var{resptr}, const char *@var{format}, ...) | |
26 | |
27 Like @code{sprintf}, but instead of passing a pointer to a buffer, you | |
28 pass a pointer to a pointer. This function will compute the size of | |
29 the buffer needed, allocate memory with @code{malloc}, and store a | |
30 pointer to the allocated memory in @code{*@var{resptr}}. The value | |
31 returned is the same as @code{sprintf} would return. If memory could | |
32 not be allocated, minus one is returned and @code{NULL} is stored in | |
33 @code{*@var{resptr}}. | |
34 | |
35 @end deftypefn | |
36 | |
37 @c atexit.c:6 | |
38 @deftypefn Supplemental int atexit (void (*@var{f})()) | |
39 | |
40 Causes function @var{f} to be called at exit. Returns 0. | |
41 | |
42 @end deftypefn | |
43 | |
44 @c basename.c:6 | |
45 @deftypefn Supplemental char* basename (const char *@var{name}) | |
46 | |
47 Returns a pointer to the last component of pathname @var{name}. | |
48 Behavior is undefined if the pathname ends in a directory separator. | |
49 | |
50 @end deftypefn | |
51 | |
52 @c bcmp.c:6 | |
53 @deftypefn Supplemental int bcmp (char *@var{x}, char *@var{y}, int @var{count}) | |
54 | |
55 Compares the first @var{count} bytes of two areas of memory. Returns | |
56 zero if they are the same, nonzero otherwise. Returns zero if | |
57 @var{count} is zero. A nonzero result only indicates a difference, | |
58 it does not indicate any sorting order (say, by having a positive | |
59 result mean @var{x} sorts before @var{y}). | |
60 | |
61 @end deftypefn | |
62 | |
63 @c bcopy.c:3 | |
64 @deftypefn Supplemental void bcopy (char *@var{in}, char *@var{out}, int @var{length}) | |
65 | |
66 Copies @var{length} bytes from memory region @var{in} to region | |
67 @var{out}. The use of @code{bcopy} is deprecated in new programs. | |
68 | |
69 @end deftypefn | |
70 | |
71 @c bsearch.c:33 | |
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72 @deftypefn Supplemental void* bsearch (const void *@var{key}, @ |
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73 const void *@var{base}, size_t @var{nmemb}, size_t @var{size}, @ |
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74 int (*@var{compar})(const void *, const void *)) |
0 | 75 |
76 Performs a search over an array of @var{nmemb} elements pointed to by | |
77 @var{base} for a member that matches the object pointed to by @var{key}. | |
78 The size of each member is specified by @var{size}. The array contents | |
79 should be sorted in ascending order according to the @var{compar} | |
80 comparison function. This routine should take two arguments pointing to | |
81 the @var{key} and to an array member, in that order, and should return an | |
82 integer less than, equal to, or greater than zero if the @var{key} object | |
83 is respectively less than, matching, or greater than the array member. | |
84 | |
85 @end deftypefn | |
86 | |
145 | 87 @c argv.c:138 |
0 | 88 @deftypefn Extension char** buildargv (char *@var{sp}) |
89 | |
90 Given a pointer to a string, parse the string extracting fields | |
91 separated by whitespace and optionally enclosed within either single | |
92 or double quotes (which are stripped off), and build a vector of | |
93 pointers to copies of the string for each field. The input string | |
94 remains unchanged. The last element of the vector is followed by a | |
95 @code{NULL} element. | |
96 | |
97 All of the memory for the pointer array and copies of the string | |
111 | 98 is obtained from @code{xmalloc}. All of the memory can be returned to the |
0 | 99 system with the single function call @code{freeargv}, which takes the |
100 returned result of @code{buildargv}, as it's argument. | |
101 | |
102 Returns a pointer to the argument vector if successful. Returns | |
103 @code{NULL} if @var{sp} is @code{NULL} or if there is insufficient | |
104 memory to complete building the argument vector. | |
105 | |
106 If the input is a null string (as opposed to a @code{NULL} pointer), | |
107 then buildarg returns an argument vector that has one arg, a null | |
108 string. | |
109 | |
110 @end deftypefn | |
111 | |
112 @c bzero.c:6 | |
113 @deftypefn Supplemental void bzero (char *@var{mem}, int @var{count}) | |
114 | |
115 Zeros @var{count} bytes starting at @var{mem}. Use of this function | |
116 is deprecated in favor of @code{memset}. | |
117 | |
118 @end deftypefn | |
119 | |
120 @c calloc.c:6 | |
121 @deftypefn Supplemental void* calloc (size_t @var{nelem}, size_t @var{elsize}) | |
122 | |
123 Uses @code{malloc} to allocate storage for @var{nelem} objects of | |
124 @var{elsize} bytes each, then zeros the memory. | |
125 | |
126 @end deftypefn | |
127 | |
111 | 128 @c filename_cmp.c:201 |
129 @deftypefn Extension int canonical_filename_eq (const char *@var{a}, const char *@var{b}) | |
130 | |
131 Return non-zero if file names @var{a} and @var{b} are equivalent. | |
132 This function compares the canonical versions of the filenames as returned by | |
133 @code{lrealpath()}, so that so that different file names pointing to the same | |
134 underlying file are treated as being identical. | |
135 | |
136 @end deftypefn | |
137 | |
138 @c choose-temp.c:45 | |
0 | 139 @deftypefn Extension char* choose_temp_base (void) |
140 | |
141 Return a prefix for temporary file names or @code{NULL} if unable to | |
142 find one. The current directory is chosen if all else fails so the | |
143 program is exited if a temporary directory can't be found (@code{mktemp} | |
144 fails). The buffer for the result is obtained with @code{xmalloc}. | |
145 | |
146 This function is provided for backwards compatibility only. Its use is | |
147 not recommended. | |
148 | |
149 @end deftypefn | |
150 | |
145 | 151 @c make-temp-file.c:95 |
111 | 152 @deftypefn Replacement const char* choose_tmpdir () |
0 | 153 |
154 Returns a pointer to a directory path suitable for creating temporary | |
155 files in. | |
156 | |
157 @end deftypefn | |
158 | |
159 @c clock.c:27 | |
160 @deftypefn Supplemental long clock (void) | |
161 | |
162 Returns an approximation of the CPU time used by the process as a | |
163 @code{clock_t}; divide this number by @samp{CLOCKS_PER_SEC} to get the | |
164 number of seconds used. | |
165 | |
166 @end deftypefn | |
167 | |
168 @c concat.c:24 | |
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169 @deftypefn Extension char* concat (const char *@var{s1}, const char *@var{s2}, @ |
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170 @dots{}, @code{NULL}) |
0 | 171 |
172 Concatenate zero or more of strings and return the result in freshly | |
111 | 173 @code{xmalloc}ed memory. The argument list is terminated by the first |
174 @code{NULL} pointer encountered. Pointers to empty strings are ignored. | |
175 | |
176 @end deftypefn | |
177 | |
145 | 178 @c argv.c:487 |
111 | 179 @deftypefn Extension int countargv (char * const *@var{argv}) |
180 | |
181 Return the number of elements in @var{argv}. | |
182 Returns zero if @var{argv} is NULL. | |
0 | 183 |
184 @end deftypefn | |
185 | |
145 | 186 @c crc32.c:140 |
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187 @deftypefn Extension {unsigned int} crc32 (const unsigned char *@var{buf}, @ |
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188 int @var{len}, unsigned int @var{init}) |
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189 |
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190 Compute the 32-bit CRC of @var{buf} which has length @var{len}. The |
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191 starting value is @var{init}; this may be used to compute the CRC of |
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192 data split across multiple buffers by passing the return value of each |
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193 call as the @var{init} parameter of the next. |
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194 |
145 | 195 This is used by the @command{gdb} remote protocol for the @samp{qCRC} |
196 command. In order to get the same results as gdb for a block of data, | |
197 you must pass the first CRC parameter as @code{0xffffffff}. | |
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198 |
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199 This CRC can be specified as: |
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200 |
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201 Width : 32 |
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202 Poly : 0x04c11db7 |
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203 Init : parameter, typically 0xffffffff |
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204 RefIn : false |
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205 RefOut : false |
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206 XorOut : 0 |
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207 |
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208 This differs from the "standard" CRC-32 algorithm in that the values |
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209 are not reflected, and there is no final XOR value. These differences |
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210 make it easy to compose the values of multiple blocks. |
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211 |
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212 @end deftypefn |
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213 |
145 | 214 @c argv.c:59 |
111 | 215 @deftypefn Extension char** dupargv (char * const *@var{vector}) |
0 | 216 |
217 Duplicate an argument vector. Simply scans through @var{vector}, | |
218 duplicating each argument until the terminating @code{NULL} is found. | |
219 Returns a pointer to the argument vector if successful. Returns | |
220 @code{NULL} if there is insufficient memory to complete building the | |
221 argument vector. | |
222 | |
223 @end deftypefn | |
224 | |
145 | 225 @c strerror.c:572 |
0 | 226 @deftypefn Extension int errno_max (void) |
227 | |
228 Returns the maximum @code{errno} value for which a corresponding | |
229 symbolic name or message is available. Note that in the case where we | |
230 use the @code{sys_errlist} supplied by the system, it is possible for | |
231 there to be more symbolic names than messages, or vice versa. In | |
232 fact, the manual page for @code{perror(3C)} explicitly warns that one | |
233 should check the size of the table (@code{sys_nerr}) before indexing | |
234 it, since new error codes may be added to the system before they are | |
235 added to the table. Thus @code{sys_nerr} might be smaller than value | |
236 implied by the largest @code{errno} value defined in @code{<errno.h>}. | |
237 | |
238 We return the maximum value that can be used to obtain a meaningful | |
239 symbolic name or message. | |
240 | |
241 @end deftypefn | |
242 | |
145 | 243 @c argv.c:344 |
0 | 244 @deftypefn Extension void expandargv (int *@var{argcp}, char ***@var{argvp}) |
245 | |
246 The @var{argcp} and @code{argvp} arguments are pointers to the usual | |
247 @code{argc} and @code{argv} arguments to @code{main}. This function | |
248 looks for arguments that begin with the character @samp{@@}. Any such | |
249 arguments are interpreted as ``response files''. The contents of the | |
250 response file are interpreted as additional command line options. In | |
251 particular, the file is separated into whitespace-separated strings; | |
252 each such string is taken as a command-line option. The new options | |
253 are inserted in place of the option naming the response file, and | |
254 @code{*argcp} and @code{*argvp} will be updated. If the value of | |
255 @code{*argvp} is modified by this function, then the new value has | |
256 been dynamically allocated and can be deallocated by the caller with | |
257 @code{freeargv}. However, most callers will simply call | |
258 @code{expandargv} near the beginning of @code{main} and allow the | |
259 operating system to free the memory when the program exits. | |
260 | |
261 @end deftypefn | |
262 | |
263 @c fdmatch.c:23 | |
264 @deftypefn Extension int fdmatch (int @var{fd1}, int @var{fd2}) | |
265 | |
266 Check to see if two open file descriptors refer to the same file. | |
267 This is useful, for example, when we have an open file descriptor for | |
268 an unnamed file, and the name of a file that we believe to correspond | |
269 to that fd. This can happen when we are exec'd with an already open | |
270 file (@code{stdout} for example) or from the SVR4 @file{/proc} calls | |
271 that return open file descriptors for mapped address spaces. All we | |
272 have to do is open the file by name and check the two file descriptors | |
273 for a match, which is done by comparing major and minor device numbers | |
274 and inode numbers. | |
275 | |
276 @end deftypefn | |
277 | |
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278 @c fopen_unlocked.c:49 |
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279 @deftypefn Extension {FILE *} fdopen_unlocked (int @var{fildes}, @ |
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280 const char * @var{mode}) |
0 | 281 |
282 Opens and returns a @code{FILE} pointer via @code{fdopen}. If the | |
283 operating system supports it, ensure that the stream is setup to avoid | |
284 any multi-threaded locking. Otherwise return the @code{FILE} pointer | |
285 unchanged. | |
286 | |
287 @end deftypefn | |
288 | |
289 @c ffs.c:3 | |
290 @deftypefn Supplemental int ffs (int @var{valu}) | |
291 | |
292 Find the first (least significant) bit set in @var{valu}. Bits are | |
293 numbered from right to left, starting with bit 1 (corresponding to the | |
294 value 1). If @var{valu} is zero, zero is returned. | |
295 | |
296 @end deftypefn | |
297 | |
111 | 298 @c filename_cmp.c:37 |
0 | 299 @deftypefn Extension int filename_cmp (const char *@var{s1}, const char *@var{s2}) |
300 | |
301 Return zero if the two file names @var{s1} and @var{s2} are equivalent. | |
302 If not equivalent, the returned value is similar to what @code{strcmp} | |
303 would return. In other words, it returns a negative value if @var{s1} | |
304 is less than @var{s2}, or a positive value if @var{s2} is greater than | |
305 @var{s2}. | |
306 | |
307 This function does not normalize file names. As a result, this function | |
308 will treat filenames that are spelled differently as different even in | |
309 the case when the two filenames point to the same underlying file. | |
310 However, it does handle the fact that on DOS-like file systems, forward | |
311 and backward slashes are equal. | |
312 | |
313 @end deftypefn | |
314 | |
111 | 315 @c filename_cmp.c:183 |
316 @deftypefn Extension int filename_eq (const void *@var{s1}, const void *@var{s2}) | |
317 | |
318 Return non-zero if file names @var{s1} and @var{s2} are equivalent. | |
319 This function is for use with hashtab.c hash tables. | |
320 | |
321 @end deftypefn | |
322 | |
323 @c filename_cmp.c:152 | |
324 @deftypefn Extension hashval_t filename_hash (const void *@var{s}) | |
325 | |
326 Return the hash value for file name @var{s} that will be compared | |
327 using filename_cmp. | |
328 This function is for use with hashtab.c hash tables. | |
329 | |
330 @end deftypefn | |
331 | |
332 @c filename_cmp.c:94 | |
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333 @deftypefn Extension int filename_ncmp (const char *@var{s1}, const char *@var{s2}, size_t @var{n}) |
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334 |
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335 Return zero if the two file names @var{s1} and @var{s2} are equivalent |
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336 in range @var{n}. |
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337 If not equivalent, the returned value is similar to what @code{strncmp} |
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338 would return. In other words, it returns a negative value if @var{s1} |
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339 is less than @var{s2}, or a positive value if @var{s2} is greater than |
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340 @var{s2}. |
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341 |
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342 This function does not normalize file names. As a result, this function |
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343 will treat filenames that are spelled differently as different even in |
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344 the case when the two filenames point to the same underlying file. |
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345 However, it does handle the fact that on DOS-like file systems, forward |
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346 and backward slashes are equal. |
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347 |
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348 @end deftypefn |
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349 |
0 | 350 @c fnmatch.txh:1 |
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351 @deftypefn Replacement int fnmatch (const char *@var{pattern}, @ |
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352 const char *@var{string}, int @var{flags}) |
0 | 353 |
354 Matches @var{string} against @var{pattern}, returning zero if it | |
355 matches, @code{FNM_NOMATCH} if not. @var{pattern} may contain the | |
356 wildcards @code{?} to match any one character, @code{*} to match any | |
357 zero or more characters, or a set of alternate characters in square | |
358 brackets, like @samp{[a-gt8]}, which match one character (@code{a} | |
359 through @code{g}, or @code{t}, or @code{8}, in this example) if that one | |
360 character is in the set. A set may be inverted (i.e., match anything | |
361 except what's in the set) by giving @code{^} or @code{!} as the first | |
362 character in the set. To include those characters in the set, list them | |
363 as anything other than the first character of the set. To include a | |
364 dash in the set, list it last in the set. A backslash character makes | |
365 the following character not special, so for example you could match | |
366 against a literal asterisk with @samp{\*}. To match a literal | |
367 backslash, use @samp{\\}. | |
368 | |
369 @code{flags} controls various aspects of the matching process, and is a | |
370 boolean OR of zero or more of the following values (defined in | |
371 @code{<fnmatch.h>}): | |
372 | |
373 @table @code | |
374 | |
375 @item FNM_PATHNAME | |
376 @itemx FNM_FILE_NAME | |
377 @var{string} is assumed to be a path name. No wildcard will ever match | |
378 @code{/}. | |
379 | |
380 @item FNM_NOESCAPE | |
381 Do not interpret backslashes as quoting the following special character. | |
382 | |
383 @item FNM_PERIOD | |
384 A leading period (at the beginning of @var{string}, or if | |
385 @code{FNM_PATHNAME} after a slash) is not matched by @code{*} or | |
386 @code{?} but must be matched explicitly. | |
387 | |
388 @item FNM_LEADING_DIR | |
389 Means that @var{string} also matches @var{pattern} if some initial part | |
390 of @var{string} matches, and is followed by @code{/} and zero or more | |
391 characters. For example, @samp{foo*} would match either @samp{foobar} | |
392 or @samp{foobar/grill}. | |
393 | |
394 @item FNM_CASEFOLD | |
395 Ignores case when performing the comparison. | |
396 | |
397 @end table | |
398 | |
399 @end deftypefn | |
400 | |
401 @c fopen_unlocked.c:39 | |
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402 @deftypefn Extension {FILE *} fopen_unlocked (const char *@var{path}, @ |
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403 const char * @var{mode}) |
0 | 404 |
405 Opens and returns a @code{FILE} pointer via @code{fopen}. If the | |
406 operating system supports it, ensure that the stream is setup to avoid | |
407 any multi-threaded locking. Otherwise return the @code{FILE} pointer | |
408 unchanged. | |
409 | |
410 @end deftypefn | |
411 | |
145 | 412 @c argv.c:93 |
0 | 413 @deftypefn Extension void freeargv (char **@var{vector}) |
414 | |
415 Free an argument vector that was built using @code{buildargv}. Simply | |
416 scans through @var{vector}, freeing the memory for each argument until | |
417 the terminating @code{NULL} is found, and then frees @var{vector} | |
418 itself. | |
419 | |
420 @end deftypefn | |
421 | |
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422 @c fopen_unlocked.c:59 |
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423 @deftypefn Extension {FILE *} freopen_unlocked (const char * @var{path}, @ |
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424 const char * @var{mode}, FILE * @var{stream}) |
0 | 425 |
426 Opens and returns a @code{FILE} pointer via @code{freopen}. If the | |
427 operating system supports it, ensure that the stream is setup to avoid | |
428 any multi-threaded locking. Otherwise return the @code{FILE} pointer | |
429 unchanged. | |
430 | |
431 @end deftypefn | |
432 | |
145 | 433 @c getruntime.c:86 |
0 | 434 @deftypefn Replacement long get_run_time (void) |
435 | |
436 Returns the time used so far, in microseconds. If possible, this is | |
437 the time used by this process, else it is the elapsed time since the | |
438 process started. | |
439 | |
440 @end deftypefn | |
441 | |
442 @c getcwd.c:6 | |
443 @deftypefn Supplemental char* getcwd (char *@var{pathname}, int @var{len}) | |
444 | |
445 Copy the absolute pathname for the current working directory into | |
446 @var{pathname}, which is assumed to point to a buffer of at least | |
447 @var{len} bytes, and return a pointer to the buffer. If the current | |
448 directory's path doesn't fit in @var{len} characters, the result is | |
449 @code{NULL} and @code{errno} is set. If @var{pathname} is a null pointer, | |
450 @code{getcwd} will obtain @var{len} bytes of space using | |
451 @code{malloc}. | |
452 | |
453 @end deftypefn | |
454 | |
455 @c getpagesize.c:5 | |
456 @deftypefn Supplemental int getpagesize (void) | |
457 | |
458 Returns the number of bytes in a page of memory. This is the | |
459 granularity of many of the system memory management routines. No | |
460 guarantee is made as to whether or not it is the same as the basic | |
461 memory management hardware page size. | |
462 | |
463 @end deftypefn | |
464 | |
465 @c getpwd.c:5 | |
466 @deftypefn Supplemental char* getpwd (void) | |
467 | |
468 Returns the current working directory. This implementation caches the | |
469 result on the assumption that the process will not call @code{chdir} | |
470 between calls to @code{getpwd}. | |
471 | |
472 @end deftypefn | |
473 | |
474 @c gettimeofday.c:12 | |
475 @deftypefn Supplemental int gettimeofday (struct timeval *@var{tp}, void *@var{tz}) | |
476 | |
477 Writes the current time to @var{tp}. This implementation requires | |
478 that @var{tz} be NULL. Returns 0 on success, -1 on failure. | |
479 | |
480 @end deftypefn | |
481 | |
482 @c hex.c:33 | |
483 @deftypefn Extension void hex_init (void) | |
484 | |
485 Initializes the array mapping the current character set to | |
486 corresponding hex values. This function must be called before any | |
487 call to @code{hex_p} or @code{hex_value}. If you fail to call it, a | |
488 default ASCII-based table will normally be used on ASCII systems. | |
489 | |
490 @end deftypefn | |
491 | |
492 @c hex.c:42 | |
493 @deftypefn Extension int hex_p (int @var{c}) | |
494 | |
495 Evaluates to non-zero if the given character is a valid hex character, | |
496 or zero if it is not. Note that the value you pass will be cast to | |
497 @code{unsigned char} within the macro. | |
498 | |
499 @end deftypefn | |
500 | |
501 @c hex.c:50 | |
502 @deftypefn Extension {unsigned int} hex_value (int @var{c}) | |
503 | |
504 Returns the numeric equivalent of the given character when interpreted | |
505 as a hexadecimal digit. The result is undefined if you pass an | |
506 invalid hex digit. Note that the value you pass will be cast to | |
507 @code{unsigned char} within the macro. | |
508 | |
509 The @code{hex_value} macro returns @code{unsigned int}, rather than | |
510 signed @code{int}, to make it easier to use in parsing addresses from | |
511 hex dump files: a signed @code{int} would be sign-extended when | |
512 converted to a wider unsigned type --- like @code{bfd_vma}, on some | |
513 systems. | |
514 | |
515 @end deftypefn | |
516 | |
145 | 517 @c safe-ctype.c:24 |
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518 @defvr Extension HOST_CHARSET |
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519 This macro indicates the basic character set and encoding used by the |
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520 host: more precisely, the encoding used for character constants in |
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521 preprocessor @samp{#if} statements (the C "execution character set"). |
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522 It is defined by @file{safe-ctype.h}, and will be an integer constant |
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523 with one of the following values: |
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524 |
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525 @ftable @code |
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526 @item HOST_CHARSET_UNKNOWN |
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527 The host character set is unknown - that is, not one of the next two |
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528 possibilities. |
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529 |
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530 @item HOST_CHARSET_ASCII |
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531 The host character set is ASCII. |
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532 |
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533 @item HOST_CHARSET_EBCDIC |
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534 The host character set is some variant of EBCDIC. (Only one of the |
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535 nineteen EBCDIC varying characters is tested; exercise caution.) |
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536 @end ftable |
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537 @end defvr |
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538 |
145 | 539 @c hashtab.c:327 |
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540 @deftypefn Supplemental htab_t htab_create_typed_alloc (size_t @var{size}, @ |
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541 htab_hash @var{hash_f}, htab_eq @var{eq_f}, htab_del @var{del_f}, @ |
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542 htab_alloc @var{alloc_tab_f}, htab_alloc @var{alloc_f}, @ |
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543 htab_free @var{free_f}) |
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544 |
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545 This function creates a hash table that uses two different allocators |
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546 @var{alloc_tab_f} and @var{alloc_f} to use for allocating the table itself |
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547 and its entries respectively. This is useful when variables of different |
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548 types need to be allocated with different allocators. |
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549 |
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550 The created hash table is slightly larger than @var{size} and it is |
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551 initially empty (all the hash table entries are @code{HTAB_EMPTY_ENTRY}). |
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552 The function returns the created hash table, or @code{NULL} if memory |
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553 allocation fails. |
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554 |
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555 @end deftypefn |
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556 |
0 | 557 @c index.c:5 |
558 @deftypefn Supplemental char* index (char *@var{s}, int @var{c}) | |
559 | |
560 Returns a pointer to the first occurrence of the character @var{c} in | |
561 the string @var{s}, or @code{NULL} if not found. The use of @code{index} is | |
562 deprecated in new programs in favor of @code{strchr}. | |
563 | |
564 @end deftypefn | |
565 | |
566 @c insque.c:6 | |
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567 @deftypefn Supplemental void insque (struct qelem *@var{elem}, @ |
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568 struct qelem *@var{pred}) |
0 | 569 @deftypefnx Supplemental void remque (struct qelem *@var{elem}) |
570 | |
571 Routines to manipulate queues built from doubly linked lists. The | |
572 @code{insque} routine inserts @var{elem} in the queue immediately | |
573 after @var{pred}. The @code{remque} routine removes @var{elem} from | |
574 its containing queue. These routines expect to be passed pointers to | |
575 structures which have as their first members a forward pointer and a | |
576 back pointer, like this prototype (although no prototype is provided): | |
577 | |
578 @example | |
579 struct qelem @{ | |
580 struct qelem *q_forw; | |
581 struct qelem *q_back; | |
582 char q_data[]; | |
583 @}; | |
584 @end example | |
585 | |
586 @end deftypefn | |
587 | |
145 | 588 @c safe-ctype.c:45 |
0 | 589 @deffn Extension ISALPHA (@var{c}) |
590 @deffnx Extension ISALNUM (@var{c}) | |
591 @deffnx Extension ISBLANK (@var{c}) | |
592 @deffnx Extension ISCNTRL (@var{c}) | |
593 @deffnx Extension ISDIGIT (@var{c}) | |
594 @deffnx Extension ISGRAPH (@var{c}) | |
595 @deffnx Extension ISLOWER (@var{c}) | |
596 @deffnx Extension ISPRINT (@var{c}) | |
597 @deffnx Extension ISPUNCT (@var{c}) | |
598 @deffnx Extension ISSPACE (@var{c}) | |
599 @deffnx Extension ISUPPER (@var{c}) | |
600 @deffnx Extension ISXDIGIT (@var{c}) | |
601 | |
602 These twelve macros are defined by @file{safe-ctype.h}. Each has the | |
603 same meaning as the corresponding macro (with name in lowercase) | |
604 defined by the standard header @file{ctype.h}. For example, | |
605 @code{ISALPHA} returns true for alphabetic characters and false for | |
606 others. However, there are two differences between these macros and | |
607 those provided by @file{ctype.h}: | |
608 | |
609 @itemize @bullet | |
610 @item These macros are guaranteed to have well-defined behavior for all | |
611 values representable by @code{signed char} and @code{unsigned char}, and | |
612 for @code{EOF}. | |
613 | |
614 @item These macros ignore the current locale; they are true for these | |
615 fixed sets of characters: | |
616 @multitable {@code{XDIGIT}} {yada yada yada yada yada yada yada yada} | |
617 @item @code{ALPHA} @tab @kbd{A-Za-z} | |
618 @item @code{ALNUM} @tab @kbd{A-Za-z0-9} | |
619 @item @code{BLANK} @tab @kbd{space tab} | |
620 @item @code{CNTRL} @tab @code{!PRINT} | |
621 @item @code{DIGIT} @tab @kbd{0-9} | |
622 @item @code{GRAPH} @tab @code{ALNUM || PUNCT} | |
623 @item @code{LOWER} @tab @kbd{a-z} | |
624 @item @code{PRINT} @tab @code{GRAPH ||} @kbd{space} | |
625 @item @code{PUNCT} @tab @kbd{`~!@@#$%^&*()_-=+[@{]@}\|;:'",<.>/?} | |
626 @item @code{SPACE} @tab @kbd{space tab \n \r \f \v} | |
627 @item @code{UPPER} @tab @kbd{A-Z} | |
628 @item @code{XDIGIT} @tab @kbd{0-9A-Fa-f} | |
629 @end multitable | |
630 | |
631 Note that, if the host character set is ASCII or a superset thereof, | |
632 all these macros will return false for all values of @code{char} outside | |
633 the range of 7-bit ASCII. In particular, both ISPRINT and ISCNTRL return | |
634 false for characters with numeric values from 128 to 255. | |
635 @end itemize | |
636 @end deffn | |
637 | |
145 | 638 @c safe-ctype.c:94 |
0 | 639 @deffn Extension ISIDNUM (@var{c}) |
640 @deffnx Extension ISIDST (@var{c}) | |
641 @deffnx Extension IS_VSPACE (@var{c}) | |
642 @deffnx Extension IS_NVSPACE (@var{c}) | |
643 @deffnx Extension IS_SPACE_OR_NUL (@var{c}) | |
644 @deffnx Extension IS_ISOBASIC (@var{c}) | |
645 These six macros are defined by @file{safe-ctype.h} and provide | |
646 additional character classes which are useful when doing lexical | |
647 analysis of C or similar languages. They are true for the following | |
648 sets of characters: | |
649 | |
650 @multitable {@code{SPACE_OR_NUL}} {yada yada yada yada yada yada yada yada} | |
651 @item @code{IDNUM} @tab @kbd{A-Za-z0-9_} | |
652 @item @code{IDST} @tab @kbd{A-Za-z_} | |
653 @item @code{VSPACE} @tab @kbd{\r \n} | |
654 @item @code{NVSPACE} @tab @kbd{space tab \f \v \0} | |
655 @item @code{SPACE_OR_NUL} @tab @code{VSPACE || NVSPACE} | |
656 @item @code{ISOBASIC} @tab @code{VSPACE || NVSPACE || PRINT} | |
657 @end multitable | |
658 @end deffn | |
659 | |
660 @c lbasename.c:23 | |
661 @deftypefn Replacement {const char*} lbasename (const char *@var{name}) | |
662 | |
663 Given a pointer to a string containing a typical pathname | |
664 (@samp{/usr/src/cmd/ls/ls.c} for example), returns a pointer to the | |
665 last component of the pathname (@samp{ls.c} in this case). The | |
666 returned pointer is guaranteed to lie within the original | |
667 string. This latter fact is not true of many vendor C | |
668 libraries, which return special strings or modify the passed | |
669 strings for particular input. | |
670 | |
671 In particular, the empty string returns the same empty string, | |
672 and a path ending in @code{/} returns the empty string after it. | |
673 | |
674 @end deftypefn | |
675 | |
676 @c lrealpath.c:25 | |
677 @deftypefn Replacement {const char*} lrealpath (const char *@var{name}) | |
678 | |
679 Given a pointer to a string containing a pathname, returns a canonical | |
680 version of the filename. Symlinks will be resolved, and ``.'' and ``..'' | |
681 components will be simplified. The returned value will be allocated using | |
682 @code{malloc}, or @code{NULL} will be returned on a memory allocation error. | |
683 | |
684 @end deftypefn | |
685 | |
145 | 686 @c make-relative-prefix.c:23 |
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687 @deftypefn Extension {const char*} make_relative_prefix (const char *@var{progname}, @ |
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688 const char *@var{bin_prefix}, const char *@var{prefix}) |
0 | 689 |
690 Given three paths @var{progname}, @var{bin_prefix}, @var{prefix}, | |
691 return the path that is in the same position relative to | |
692 @var{progname}'s directory as @var{prefix} is relative to | |
693 @var{bin_prefix}. That is, a string starting with the directory | |
694 portion of @var{progname}, followed by a relative pathname of the | |
695 difference between @var{bin_prefix} and @var{prefix}. | |
696 | |
697 If @var{progname} does not contain any directory separators, | |
698 @code{make_relative_prefix} will search @env{PATH} to find a program | |
699 named @var{progname}. Also, if @var{progname} is a symbolic link, | |
700 the symbolic link will be resolved. | |
701 | |
702 For example, if @var{bin_prefix} is @code{/alpha/beta/gamma/gcc/delta}, | |
703 @var{prefix} is @code{/alpha/beta/gamma/omega/}, and @var{progname} is | |
704 @code{/red/green/blue/gcc}, then this function will return | |
705 @code{/red/green/blue/../../omega/}. | |
706 | |
707 The return value is normally allocated via @code{malloc}. If no | |
708 relative prefix can be found, return @code{NULL}. | |
709 | |
710 @end deftypefn | |
711 | |
145 | 712 @c make-temp-file.c:173 |
0 | 713 @deftypefn Replacement char* make_temp_file (const char *@var{suffix}) |
714 | |
715 Return a temporary file name (as a string) or @code{NULL} if unable to | |
716 create one. @var{suffix} is a suffix to append to the file name. The | |
717 string is @code{malloc}ed, and the temporary file has been created. | |
718 | |
719 @end deftypefn | |
720 | |
721 @c memchr.c:3 | |
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722 @deftypefn Supplemental void* memchr (const void *@var{s}, int @var{c}, @ |
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723 size_t @var{n}) |
0 | 724 |
725 This function searches memory starting at @code{*@var{s}} for the | |
726 character @var{c}. The search only ends with the first occurrence of | |
727 @var{c}, or after @var{length} characters; in particular, a null | |
728 character does not terminate the search. If the character @var{c} is | |
729 found within @var{length} characters of @code{*@var{s}}, a pointer | |
730 to the character is returned. If @var{c} is not found, then @code{NULL} is | |
731 returned. | |
732 | |
733 @end deftypefn | |
734 | |
735 @c memcmp.c:6 | |
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736 @deftypefn Supplemental int memcmp (const void *@var{x}, const void *@var{y}, @ |
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737 size_t @var{count}) |
0 | 738 |
739 Compares the first @var{count} bytes of two areas of memory. Returns | |
740 zero if they are the same, a value less than zero if @var{x} is | |
741 lexically less than @var{y}, or a value greater than zero if @var{x} | |
742 is lexically greater than @var{y}. Note that lexical order is determined | |
743 as if comparing unsigned char arrays. | |
744 | |
745 @end deftypefn | |
746 | |
747 @c memcpy.c:6 | |
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748 @deftypefn Supplemental void* memcpy (void *@var{out}, const void *@var{in}, @ |
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749 size_t @var{length}) |
0 | 750 |
751 Copies @var{length} bytes from memory region @var{in} to region | |
752 @var{out}. Returns a pointer to @var{out}. | |
753 | |
754 @end deftypefn | |
755 | |
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756 @c memmem.c:20 |
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757 @deftypefn Supplemental void* memmem (const void *@var{haystack}, @ |
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758 size_t @var{haystack_len} const void *@var{needle}, size_t @var{needle_len}) |
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759 |
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760 Returns a pointer to the first occurrence of @var{needle} (length |
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761 @var{needle_len}) in @var{haystack} (length @var{haystack_len}). |
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762 Returns @code{NULL} if not found. |
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763 |
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764 @end deftypefn |
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765 |
0 | 766 @c memmove.c:6 |
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767 @deftypefn Supplemental void* memmove (void *@var{from}, const void *@var{to}, @ |
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768 size_t @var{count}) |
0 | 769 |
770 Copies @var{count} bytes from memory area @var{from} to memory area | |
771 @var{to}, returning a pointer to @var{to}. | |
772 | |
773 @end deftypefn | |
774 | |
775 @c mempcpy.c:23 | |
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776 @deftypefn Supplemental void* mempcpy (void *@var{out}, const void *@var{in}, @ |
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777 size_t @var{length}) |
0 | 778 |
779 Copies @var{length} bytes from memory region @var{in} to region | |
780 @var{out}. Returns a pointer to @var{out} + @var{length}. | |
781 | |
782 @end deftypefn | |
783 | |
784 @c memset.c:6 | |
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785 @deftypefn Supplemental void* memset (void *@var{s}, int @var{c}, @ |
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786 size_t @var{count}) |
0 | 787 |
788 Sets the first @var{count} bytes of @var{s} to the constant byte | |
789 @var{c}, returning a pointer to @var{s}. | |
790 | |
791 @end deftypefn | |
792 | |
145 | 793 @c mkstemps.c:60 |
0 | 794 @deftypefn Replacement int mkstemps (char *@var{pattern}, int @var{suffix_len}) |
795 | |
796 Generate a unique temporary file name from @var{pattern}. | |
797 @var{pattern} has the form: | |
798 | |
799 @example | |
800 @var{path}/ccXXXXXX@var{suffix} | |
801 @end example | |
802 | |
803 @var{suffix_len} tells us how long @var{suffix} is (it can be zero | |
804 length). The last six characters of @var{pattern} before @var{suffix} | |
805 must be @samp{XXXXXX}; they are replaced with a string that makes the | |
806 filename unique. Returns a file descriptor open on the file for | |
807 reading and writing. | |
808 | |
809 @end deftypefn | |
810 | |
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811 @c pexecute.txh:278 |
0 | 812 @deftypefn Extension void pex_free (struct pex_obj @var{obj}) |
813 | |
814 Clean up and free all data associated with @var{obj}. If you have not | |
815 yet called @code{pex_get_times} or @code{pex_get_status}, this will | |
816 try to kill the subprocesses. | |
817 | |
818 @end deftypefn | |
819 | |
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820 @c pexecute.txh:251 |
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821 @deftypefn Extension int pex_get_status (struct pex_obj *@var{obj}, @ |
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822 int @var{count}, int *@var{vector}) |
0 | 823 |
824 Returns the exit status of all programs run using @var{obj}. | |
825 @var{count} is the number of results expected. The results will be | |
826 placed into @var{vector}. The results are in the order of the calls | |
827 to @code{pex_run}. Returns 0 on error, 1 on success. | |
828 | |
829 @end deftypefn | |
830 | |
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831 @c pexecute.txh:261 |
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832 @deftypefn Extension int pex_get_times (struct pex_obj *@var{obj}, @ |
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833 int @var{count}, struct pex_time *@var{vector}) |
0 | 834 |
835 Returns the process execution times of all programs run using | |
836 @var{obj}. @var{count} is the number of results expected. The | |
837 results will be placed into @var{vector}. The results are in the | |
838 order of the calls to @code{pex_run}. Returns 0 on error, 1 on | |
839 success. | |
840 | |
841 @code{struct pex_time} has the following fields of the type | |
842 @code{unsigned long}: @code{user_seconds}, | |
843 @code{user_microseconds}, @code{system_seconds}, | |
844 @code{system_microseconds}. On systems which do not support reporting | |
845 process times, all the fields will be set to @code{0}. | |
846 | |
847 @end deftypefn | |
848 | |
849 @c pexecute.txh:2 | |
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850 @deftypefn Extension {struct pex_obj *} pex_init (int @var{flags}, @ |
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851 const char *@var{pname}, const char *@var{tempbase}) |
0 | 852 |
853 Prepare to execute one or more programs, with standard output of each | |
854 program fed to standard input of the next. This is a system | |
855 independent interface to execute a pipeline. | |
856 | |
857 @var{flags} is a bitwise combination of the following: | |
858 | |
859 @table @code | |
860 | |
861 @vindex PEX_RECORD_TIMES | |
862 @item PEX_RECORD_TIMES | |
863 Record subprocess times if possible. | |
864 | |
865 @vindex PEX_USE_PIPES | |
866 @item PEX_USE_PIPES | |
867 Use pipes for communication between processes, if possible. | |
868 | |
869 @vindex PEX_SAVE_TEMPS | |
870 @item PEX_SAVE_TEMPS | |
871 Don't delete temporary files used for communication between | |
872 processes. | |
873 | |
874 @end table | |
875 | |
876 @var{pname} is the name of program to be executed, used in error | |
877 messages. @var{tempbase} is a base name to use for any required | |
878 temporary files; it may be @code{NULL} to use a randomly chosen name. | |
879 | |
880 @end deftypefn | |
881 | |
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882 @c pexecute.txh:161 |
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883 @deftypefn Extension {FILE *} pex_input_file (struct pex_obj *@var{obj}, @ |
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884 int @var{flags}, const char *@var{in_name}) |
0 | 885 |
886 Return a stream for a temporary file to pass to the first program in | |
887 the pipeline as input. | |
888 | |
889 The name of the input file is chosen according to the same rules | |
890 @code{pex_run} uses to choose output file names, based on | |
891 @var{in_name}, @var{obj} and the @code{PEX_SUFFIX} bit in @var{flags}. | |
892 | |
893 Don't call @code{fclose} on the returned stream; the first call to | |
894 @code{pex_run} closes it automatically. | |
895 | |
896 If @var{flags} includes @code{PEX_BINARY_OUTPUT}, open the stream in | |
897 binary mode; otherwise, open it in the default mode. Including | |
898 @code{PEX_BINARY_OUTPUT} in @var{flags} has no effect on Unix. | |
899 @end deftypefn | |
900 | |
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901 @c pexecute.txh:179 |
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902 @deftypefn Extension {FILE *} pex_input_pipe (struct pex_obj *@var{obj}, @ |
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903 int @var{binary}) |
0 | 904 |
905 Return a stream @var{fp} for a pipe connected to the standard input of | |
906 the first program in the pipeline; @var{fp} is opened for writing. | |
907 You must have passed @code{PEX_USE_PIPES} to the @code{pex_init} call | |
908 that returned @var{obj}. | |
909 | |
910 You must close @var{fp} using @code{fclose} yourself when you have | |
911 finished writing data to the pipeline. | |
912 | |
913 The file descriptor underlying @var{fp} is marked not to be inherited | |
914 by child processes. | |
915 | |
916 On systems that do not support pipes, this function returns | |
917 @code{NULL}, and sets @code{errno} to @code{EINVAL}. If you would | |
918 like to write code that is portable to all systems the @code{pex} | |
919 functions support, consider using @code{pex_input_file} instead. | |
920 | |
921 There are two opportunities for deadlock using | |
922 @code{pex_input_pipe}: | |
923 | |
924 @itemize @bullet | |
925 @item | |
926 Most systems' pipes can buffer only a fixed amount of data; a process | |
927 that writes to a full pipe blocks. Thus, if you write to @file{fp} | |
928 before starting the first process, you run the risk of blocking when | |
929 there is no child process yet to read the data and allow you to | |
930 continue. @code{pex_input_pipe} makes no promises about the | |
931 size of the pipe's buffer, so if you need to write any data at all | |
932 before starting the first process in the pipeline, consider using | |
933 @code{pex_input_file} instead. | |
934 | |
935 @item | |
936 Using @code{pex_input_pipe} and @code{pex_read_output} together | |
937 may also cause deadlock. If the output pipe fills up, so that each | |
938 program in the pipeline is waiting for the next to read more data, and | |
939 you fill the input pipe by writing more data to @var{fp}, then there | |
940 is no way to make progress: the only process that could read data from | |
941 the output pipe is you, but you are blocked on the input pipe. | |
942 | |
943 @end itemize | |
944 | |
945 @end deftypefn | |
946 | |
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947 @c pexecute.txh:286 |
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948 @deftypefn Extension {const char *} pex_one (int @var{flags}, @ |
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949 const char *@var{executable}, char * const *@var{argv}, @ |
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950 const char *@var{pname}, const char *@var{outname}, const char *@var{errname}, @ |
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951 int *@var{status}, int *@var{err}) |
0 | 952 |
953 An interface to permit the easy execution of a | |
954 single program. The return value and most of the parameters are as | |
955 for a call to @code{pex_run}. @var{flags} is restricted to a | |
956 combination of @code{PEX_SEARCH}, @code{PEX_STDERR_TO_STDOUT}, and | |
957 @code{PEX_BINARY_OUTPUT}. @var{outname} is interpreted as if | |
958 @code{PEX_LAST} were set. On a successful return, @code{*@var{status}} will | |
959 be set to the exit status of the program. | |
960 | |
961 @end deftypefn | |
962 | |
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963 @c pexecute.txh:237 |
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964 @deftypefn Extension {FILE *} pex_read_err (struct pex_obj *@var{obj}, @ |
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965 int @var{binary}) |
0 | 966 |
967 Returns a @code{FILE} pointer which may be used to read the standard | |
968 error of the last program in the pipeline. When this is used, | |
969 @code{PEX_LAST} should not be used in a call to @code{pex_run}. After | |
970 this is called, @code{pex_run} may no longer be called with the same | |
971 @var{obj}. @var{binary} should be non-zero if the file should be | |
972 opened in binary mode. Don't call @code{fclose} on the returned file; | |
973 it will be closed by @code{pex_free}. | |
974 | |
975 @end deftypefn | |
976 | |
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977 @c pexecute.txh:224 |
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978 @deftypefn Extension {FILE *} pex_read_output (struct pex_obj *@var{obj}, @ |
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979 int @var{binary}) |
0 | 980 |
981 Returns a @code{FILE} pointer which may be used to read the standard | |
982 output of the last program in the pipeline. When this is used, | |
983 @code{PEX_LAST} should not be used in a call to @code{pex_run}. After | |
984 this is called, @code{pex_run} may no longer be called with the same | |
985 @var{obj}. @var{binary} should be non-zero if the file should be | |
986 opened in binary mode. Don't call @code{fclose} on the returned file; | |
987 it will be closed by @code{pex_free}. | |
988 | |
989 @end deftypefn | |
990 | |
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991 @c pexecute.txh:34 |
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992 @deftypefn Extension {const char *} pex_run (struct pex_obj *@var{obj}, @ |
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993 int @var{flags}, const char *@var{executable}, char * const *@var{argv}, @ |
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994 const char *@var{outname}, const char *@var{errname}, int *@var{err}) |
0 | 995 |
996 Execute one program in a pipeline. On success this returns | |
997 @code{NULL}. On failure it returns an error message, a statically | |
998 allocated string. | |
999 | |
1000 @var{obj} is returned by a previous call to @code{pex_init}. | |
1001 | |
1002 @var{flags} is a bitwise combination of the following: | |
1003 | |
1004 @table @code | |
1005 | |
1006 @vindex PEX_LAST | |
1007 @item PEX_LAST | |
1008 This must be set on the last program in the pipeline. In particular, | |
1009 it should be set when executing a single program. The standard output | |
1010 of the program will be sent to @var{outname}, or, if @var{outname} is | |
1011 @code{NULL}, to the standard output of the calling program. Do @emph{not} | |
1012 set this bit if you want to call @code{pex_read_output} | |
1013 (described below). After a call to @code{pex_run} with this bit set, | |
1014 @var{pex_run} may no longer be called with the same @var{obj}. | |
1015 | |
1016 @vindex PEX_SEARCH | |
1017 @item PEX_SEARCH | |
1018 Search for the program using the user's executable search path. | |
1019 | |
1020 @vindex PEX_SUFFIX | |
1021 @item PEX_SUFFIX | |
1022 @var{outname} is a suffix. See the description of @var{outname}, | |
1023 below. | |
1024 | |
1025 @vindex PEX_STDERR_TO_STDOUT | |
1026 @item PEX_STDERR_TO_STDOUT | |
1027 Send the program's standard error to standard output, if possible. | |
1028 | |
1029 @vindex PEX_BINARY_INPUT | |
1030 @vindex PEX_BINARY_OUTPUT | |
1031 @vindex PEX_BINARY_ERROR | |
1032 @item PEX_BINARY_INPUT | |
1033 @itemx PEX_BINARY_OUTPUT | |
1034 @itemx PEX_BINARY_ERROR | |
1035 The standard input (output or error) of the program should be read (written) in | |
1036 binary mode rather than text mode. These flags are ignored on systems | |
1037 which do not distinguish binary mode and text mode, such as Unix. For | |
1038 proper behavior these flags should match appropriately---a call to | |
1039 @code{pex_run} using @code{PEX_BINARY_OUTPUT} should be followed by a | |
1040 call using @code{PEX_BINARY_INPUT}. | |
1041 | |
1042 @vindex PEX_STDERR_TO_PIPE | |
1043 @item PEX_STDERR_TO_PIPE | |
1044 Send the program's standard error to a pipe, if possible. This flag | |
1045 cannot be specified together with @code{PEX_STDERR_TO_STDOUT}. This | |
1046 flag can be specified only on the last program in pipeline. | |
1047 | |
1048 @end table | |
1049 | |
1050 @var{executable} is the program to execute. @var{argv} is the set of | |
1051 arguments to pass to the program; normally @code{@var{argv}[0]} will | |
1052 be a copy of @var{executable}. | |
1053 | |
1054 @var{outname} is used to set the name of the file to use for standard | |
1055 output. There are two cases in which no output file will be used: | |
1056 | |
1057 @enumerate | |
1058 @item | |
1059 if @code{PEX_LAST} is not set in @var{flags}, and @code{PEX_USE_PIPES} | |
1060 was set in the call to @code{pex_init}, and the system supports pipes | |
1061 | |
1062 @item | |
1063 if @code{PEX_LAST} is set in @var{flags}, and @var{outname} is | |
1064 @code{NULL} | |
1065 @end enumerate | |
1066 | |
1067 @noindent | |
1068 Otherwise the code will use a file to hold standard | |
1069 output. If @code{PEX_LAST} is not set, this file is considered to be | |
1070 a temporary file, and it will be removed when no longer needed, unless | |
1071 @code{PEX_SAVE_TEMPS} was set in the call to @code{pex_init}. | |
1072 | |
1073 There are two cases to consider when setting the name of the file to | |
1074 hold standard output. | |
1075 | |
1076 @enumerate | |
1077 @item | |
1078 @code{PEX_SUFFIX} is set in @var{flags}. In this case | |
1079 @var{outname} may not be @code{NULL}. If the @var{tempbase} parameter | |
1080 to @code{pex_init} was not @code{NULL}, then the output file name is | |
1081 the concatenation of @var{tempbase} and @var{outname}. If | |
1082 @var{tempbase} was @code{NULL}, then the output file name is a random | |
1083 file name ending in @var{outname}. | |
1084 | |
1085 @item | |
1086 @code{PEX_SUFFIX} was not set in @var{flags}. In this | |
1087 case, if @var{outname} is not @code{NULL}, it is used as the output | |
1088 file name. If @var{outname} is @code{NULL}, and @var{tempbase} was | |
1089 not NULL, the output file name is randomly chosen using | |
1090 @var{tempbase}. Otherwise the output file name is chosen completely | |
1091 at random. | |
1092 @end enumerate | |
1093 | |
1094 @var{errname} is the file name to use for standard error output. If | |
1095 it is @code{NULL}, standard error is the same as the caller's. | |
1096 Otherwise, standard error is written to the named file. | |
1097 | |
1098 On an error return, the code sets @code{*@var{err}} to an @code{errno} | |
1099 value, or to 0 if there is no relevant @code{errno}. | |
1100 | |
1101 @end deftypefn | |
1102 | |
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1103 @c pexecute.txh:145 |
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1104 @deftypefn Extension {const char *} pex_run_in_environment (struct pex_obj *@var{obj}, @ |
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1105 int @var{flags}, const char *@var{executable}, char * const *@var{argv}, @ |
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1106 char * const *@var{env}, int @var{env_size}, const char *@var{outname}, @ |
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1107 const char *@var{errname}, int *@var{err}) |
0 | 1108 |
1109 Execute one program in a pipeline, permitting the environment for the | |
1110 program to be specified. Behaviour and parameters not listed below are | |
1111 as for @code{pex_run}. | |
1112 | |
1113 @var{env} is the environment for the child process, specified as an array of | |
1114 character pointers. Each element of the array should point to a string of the | |
1115 form @code{VAR=VALUE}, with the exception of the last element that must be | |
1116 @code{NULL}. | |
1117 | |
1118 @end deftypefn | |
1119 | |
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1120 @c pexecute.txh:301 |
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1121 @deftypefn Extension int pexecute (const char *@var{program}, @ |
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1122 char * const *@var{argv}, const char *@var{this_pname}, @ |
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1123 const char *@var{temp_base}, char **@var{errmsg_fmt}, @ |
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1124 char **@var{errmsg_arg}, int @var{flags}) |
0 | 1125 |
1126 This is the old interface to execute one or more programs. It is | |
1127 still supported for compatibility purposes, but is no longer | |
1128 documented. | |
1129 | |
1130 @end deftypefn | |
1131 | |
1132 @c strsignal.c:541 | |
1133 @deftypefn Supplemental void psignal (int @var{signo}, char *@var{message}) | |
1134 | |
1135 Print @var{message} to the standard error, followed by a colon, | |
1136 followed by the description of the signal specified by @var{signo}, | |
1137 followed by a newline. | |
1138 | |
1139 @end deftypefn | |
1140 | |
1141 @c putenv.c:21 | |
1142 @deftypefn Supplemental int putenv (const char *@var{string}) | |
1143 | |
1144 Uses @code{setenv} or @code{unsetenv} to put @var{string} into | |
1145 the environment or remove it. If @var{string} is of the form | |
1146 @samp{name=value} the string is added; if no @samp{=} is present the | |
1147 name is unset/removed. | |
1148 | |
1149 @end deftypefn | |
1150 | |
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1151 @c pexecute.txh:312 |
0 | 1152 @deftypefn Extension int pwait (int @var{pid}, int *@var{status}, int @var{flags}) |
1153 | |
1154 Another part of the old execution interface. | |
1155 | |
1156 @end deftypefn | |
1157 | |
1158 @c random.c:39 | |
1159 @deftypefn Supplement {long int} random (void) | |
1160 @deftypefnx Supplement void srandom (unsigned int @var{seed}) | |
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1161 @deftypefnx Supplement void* initstate (unsigned int @var{seed}, @ |
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1162 void *@var{arg_state}, unsigned long @var{n}) |
0 | 1163 @deftypefnx Supplement void* setstate (void *@var{arg_state}) |
1164 | |
1165 Random number functions. @code{random} returns a random number in the | |
1166 range 0 to @code{LONG_MAX}. @code{srandom} initializes the random | |
1167 number generator to some starting point determined by @var{seed} | |
1168 (else, the values returned by @code{random} are always the same for each | |
1169 run of the program). @code{initstate} and @code{setstate} allow fine-grained | |
1170 control over the state of the random number generator. | |
1171 | |
1172 @end deftypefn | |
1173 | |
111 | 1174 @c concat.c:160 |
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1175 @deftypefn Extension char* reconcat (char *@var{optr}, const char *@var{s1}, @ |
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1176 @dots{}, @code{NULL}) |
0 | 1177 |
1178 Same as @code{concat}, except that if @var{optr} is not @code{NULL} it | |
1179 is freed after the string is created. This is intended to be useful | |
1180 when you're extending an existing string or building up a string in a | |
1181 loop: | |
1182 | |
1183 @example | |
1184 str = reconcat (str, "pre-", str, NULL); | |
1185 @end example | |
1186 | |
1187 @end deftypefn | |
1188 | |
1189 @c rename.c:6 | |
1190 @deftypefn Supplemental int rename (const char *@var{old}, const char *@var{new}) | |
1191 | |
1192 Renames a file from @var{old} to @var{new}. If @var{new} already | |
1193 exists, it is removed. | |
1194 | |
1195 @end deftypefn | |
1196 | |
1197 @c rindex.c:5 | |
1198 @deftypefn Supplemental char* rindex (const char *@var{s}, int @var{c}) | |
1199 | |
1200 Returns a pointer to the last occurrence of the character @var{c} in | |
1201 the string @var{s}, or @code{NULL} if not found. The use of @code{rindex} is | |
1202 deprecated in new programs in favor of @code{strrchr}. | |
1203 | |
1204 @end deftypefn | |
1205 | |
145 | 1206 @c setenv.c:22 |
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1207 @deftypefn Supplemental int setenv (const char *@var{name}, @ |
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1208 const char *@var{value}, int @var{overwrite}) |
0 | 1209 @deftypefnx Supplemental void unsetenv (const char *@var{name}) |
1210 | |
1211 @code{setenv} adds @var{name} to the environment with value | |
1212 @var{value}. If the name was already present in the environment, | |
1213 the new value will be stored only if @var{overwrite} is nonzero. | |
1214 The companion @code{unsetenv} function removes @var{name} from the | |
1215 environment. This implementation is not safe for multithreaded code. | |
1216 | |
1217 @end deftypefn | |
1218 | |
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1219 @c setproctitle.c:31 |
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1220 @deftypefn Supplemental void setproctitle (const char *@var{fmt}, ...) |
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1221 |
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1222 Set the title of a process to @var{fmt}. va args not supported for now, |
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1223 but defined for compatibility with BSD. |
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1224 |
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1225 @end deftypefn |
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1226 |
0 | 1227 @c strsignal.c:348 |
1228 @deftypefn Extension int signo_max (void) | |
1229 | |
1230 Returns the maximum signal value for which a corresponding symbolic | |
1231 name or message is available. Note that in the case where we use the | |
1232 @code{sys_siglist} supplied by the system, it is possible for there to | |
1233 be more symbolic names than messages, or vice versa. In fact, the | |
1234 manual page for @code{psignal(3b)} explicitly warns that one should | |
1235 check the size of the table (@code{NSIG}) before indexing it, since | |
1236 new signal codes may be added to the system before they are added to | |
1237 the table. Thus @code{NSIG} might be smaller than value implied by | |
1238 the largest signo value defined in @code{<signal.h>}. | |
1239 | |
1240 We return the maximum value that can be used to obtain a meaningful | |
1241 symbolic name or message. | |
1242 | |
1243 @end deftypefn | |
1244 | |
1245 @c sigsetmask.c:8 | |
1246 @deftypefn Supplemental int sigsetmask (int @var{set}) | |
1247 | |
1248 Sets the signal mask to the one provided in @var{set} and returns | |
1249 the old mask (which, for libiberty's implementation, will always | |
1250 be the value @code{1}). | |
1251 | |
1252 @end deftypefn | |
1253 | |
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1254 @c simple-object.txh:96 |
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1255 @deftypefn Extension {const char *} simple_object_attributes_compare @ |
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1256 (simple_object_attributes *@var{attrs1}, simple_object_attributes *@var{attrs2}, @ |
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1257 int *@var{err}) |
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1258 |
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1259 Compare @var{attrs1} and @var{attrs2}. If they could be linked |
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1260 together without error, return @code{NULL}. Otherwise, return an |
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1261 error message and set @code{*@var{err}} to an errno value or @code{0} |
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1262 if there is no relevant errno. |
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1263 |
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1264 @end deftypefn |
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1265 |
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1266 @c simple-object.txh:81 |
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1267 @deftypefn Extension {simple_object_attributes *} simple_object_fetch_attributes @ |
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1268 (simple_object_read *@var{simple_object}, const char **@var{errmsg}, int *@var{err}) |
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1269 |
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1270 Fetch the attributes of @var{simple_object}. The attributes are |
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1271 internal information such as the format of the object file, or the |
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1272 architecture it was compiled for. This information will persist until |
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1273 @code{simple_object_attributes_release} is called, even if |
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1274 @var{simple_object} itself is released. |
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1275 |
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1276 On error this returns @code{NULL}, sets @code{*@var{errmsg}} to an |
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1277 error message, and sets @code{*@var{err}} to an errno value or |
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1278 @code{0} if there is no relevant errno. |
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1279 |
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1280 @end deftypefn |
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1281 |
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1282 @c simple-object.txh:49 |
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1283 @deftypefn Extension {int} simple_object_find_section @ |
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1284 (simple_object_read *@var{simple_object} off_t *@var{offset}, @ |
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1285 off_t *@var{length}, const char **@var{errmsg}, int *@var{err}) |
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1286 |
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1287 Look for the section @var{name} in @var{simple_object}. This returns |
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1288 information for the first section with that name. |
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1289 |
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1290 If found, return 1 and set @code{*@var{offset}} to the offset in the |
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1291 file of the section contents and set @code{*@var{length}} to the |
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1292 length of the section contents. The value in @code{*@var{offset}} |
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1293 will be relative to the offset passed to |
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1294 @code{simple_object_open_read}. |
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1295 |
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1296 If the section is not found, and no error occurs, |
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1297 @code{simple_object_find_section} returns @code{0} and set |
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1298 @code{*@var{errmsg}} to @code{NULL}. |
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1299 |
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1300 If an error occurs, @code{simple_object_find_section} returns |
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1301 @code{0}, sets @code{*@var{errmsg}} to an error message, and sets |
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1302 @code{*@var{err}} to an errno value or @code{0} if there is no |
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1303 relevant errno. |
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1304 |
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1305 @end deftypefn |
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1306 |
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1307 @c simple-object.txh:27 |
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1308 @deftypefn Extension {const char *} simple_object_find_sections @ |
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1309 (simple_object_read *@var{simple_object}, int (*@var{pfn}) (void *@var{data}, @ |
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1310 const char *@var{name}, off_t @var{offset}, off_t @var{length}), @ |
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1311 void *@var{data}, int *@var{err}) |
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1312 |
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1313 This function calls @var{pfn} for each section in @var{simple_object}. |
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1314 It calls @var{pfn} with the section name, the offset within the file |
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1315 of the section contents, and the length of the section contents. The |
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1316 offset within the file is relative to the offset passed to |
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1317 @code{simple_object_open_read}. The @var{data} argument to this |
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1318 function is passed along to @var{pfn}. |
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1319 |
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1320 If @var{pfn} returns @code{0}, the loop over the sections stops and |
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1321 @code{simple_object_find_sections} returns. If @var{pfn} returns some |
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1322 other value, the loop continues. |
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1323 |
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1324 On success @code{simple_object_find_sections} returns. On error it |
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1325 returns an error string, and sets @code{*@var{err}} to an errno value |
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1326 or @code{0} if there is no relevant errno. |
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1327 |
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1328 @end deftypefn |
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1329 |
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1330 @c simple-object.txh:2 |
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1331 @deftypefn Extension {simple_object_read *} simple_object_open_read @ |
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1332 (int @var{descriptor}, off_t @var{offset}, const char *{segment_name}, @ |
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1333 const char **@var{errmsg}, int *@var{err}) |
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1334 |
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1335 Opens an object file for reading. Creates and returns an |
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1336 @code{simple_object_read} pointer which may be passed to other |
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1337 functions to extract data from the object file. |
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1338 |
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1339 @var{descriptor} holds a file descriptor which permits reading. |
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1340 |
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1341 @var{offset} is the offset into the file; this will be @code{0} in the |
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1342 normal case, but may be a different value when reading an object file |
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1343 in an archive file. |
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1344 |
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1345 @var{segment_name} is only used with the Mach-O file format used on |
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1346 Darwin aka Mac OS X. It is required on that platform, and means to |
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1347 only look at sections within the segment with that name. The |
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1348 parameter is ignored on other systems. |
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1349 |
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1350 If an error occurs, this functions returns @code{NULL} and sets |
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1351 @code{*@var{errmsg}} to an error string and sets @code{*@var{err}} to |
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1352 an errno value or @code{0} if there is no relevant errno. |
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1353 |
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1354 @end deftypefn |
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1355 |
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1356 @c simple-object.txh:107 |
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1357 @deftypefn Extension {void} simple_object_release_attributes @ |
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1358 (simple_object_attributes *@var{attrs}) |
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1359 |
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1360 Release all resources associated with @var{attrs}. |
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1361 |
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1362 @end deftypefn |
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1363 |
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1364 @c simple-object.txh:73 |
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1365 @deftypefn Extension {void} simple_object_release_read @ |
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1366 (simple_object_read *@var{simple_object}) |
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1367 |
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1368 Release all resources associated with @var{simple_object}. This does |
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1369 not close the file descriptor. |
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1370 |
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1371 @end deftypefn |
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1372 |
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1373 @c simple-object.txh:184 |
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1374 @deftypefn Extension {void} simple_object_release_write @ |
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1375 (simple_object_write *@var{simple_object}) |
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1376 |
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1377 Release all resources associated with @var{simple_object}. |
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1378 |
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1379 @end deftypefn |
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1380 |
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1381 @c simple-object.txh:114 |
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1382 @deftypefn Extension {simple_object_write *} simple_object_start_write @ |
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1383 (simple_object_attributes @var{attrs}, const char *@var{segment_name}, @ |
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1384 const char **@var{errmsg}, int *@var{err}) |
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1385 |
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1386 Start creating a new object file using the object file format |
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1387 described in @var{attrs}. You must fetch attribute information from |
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1388 an existing object file before you can create a new one. There is |
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1389 currently no support for creating an object file de novo. |
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1390 |
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1391 @var{segment_name} is only used with Mach-O as found on Darwin aka Mac |
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1392 OS X. The parameter is required on that target. It means that all |
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1393 sections are created within the named segment. It is ignored for |
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1394 other object file formats. |
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1395 |
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1396 On error @code{simple_object_start_write} returns @code{NULL}, sets |
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1397 @code{*@var{ERRMSG}} to an error message, and sets @code{*@var{err}} |
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1398 to an errno value or @code{0} if there is no relevant errno. |
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1399 |
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1400 @end deftypefn |
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1401 |
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1402 @c simple-object.txh:153 |
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1403 @deftypefn Extension {const char *} simple_object_write_add_data @ |
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1404 (simple_object_write *@var{simple_object}, @ |
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1405 simple_object_write_section *@var{section}, const void *@var{buffer}, @ |
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1406 size_t @var{size}, int @var{copy}, int *@var{err}) |
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1407 |
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1408 Add data @var{buffer}/@var{size} to @var{section} in |
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1409 @var{simple_object}. If @var{copy} is non-zero, the data will be |
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1410 copied into memory if necessary. If @var{copy} is zero, @var{buffer} |
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1411 must persist until @code{simple_object_write_to_file} is called. is |
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1412 released. |
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1413 |
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1414 On success this returns @code{NULL}. On error this returns an error |
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1415 message, and sets @code{*@var{err}} to an errno value or 0 if there is |
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1416 no relevant erro. |
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1417 |
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1418 @end deftypefn |
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1419 |
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1420 @c simple-object.txh:134 |
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1421 @deftypefn Extension {simple_object_write_section *} simple_object_write_create_section @ |
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1422 (simple_object_write *@var{simple_object}, const char *@var{name}, @ |
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1423 unsigned int @var{align}, const char **@var{errmsg}, int *@var{err}) |
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1424 |
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1425 Add a section to @var{simple_object}. @var{name} is the name of the |
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1426 new section. @var{align} is the required alignment expressed as the |
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1427 number of required low-order 0 bits (e.g., 2 for alignment to a 32-bit |
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1428 boundary). |
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1429 |
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1430 The section is created as containing data, readable, not writable, not |
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1431 executable, not loaded at runtime. The section is not written to the |
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1432 file until @code{simple_object_write_to_file} is called. |
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1433 |
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1434 On error this returns @code{NULL}, sets @code{*@var{errmsg}} to an |
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1435 error message, and sets @code{*@var{err}} to an errno value or |
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1436 @code{0} if there is no relevant errno. |
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1437 |
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1438 @end deftypefn |
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1439 |
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1440 @c simple-object.txh:170 |
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1441 @deftypefn Extension {const char *} simple_object_write_to_file @ |
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1442 (simple_object_write *@var{simple_object}, int @var{descriptor}, int *@var{err}) |
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1443 |
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1444 Write the complete object file to @var{descriptor}, an open file |
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1445 descriptor. This writes out all the data accumulated by calls to |
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1446 @code{simple_object_write_create_section} and |
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1447 @var{simple_object_write_add_data}. |
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1448 |
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1449 This returns @code{NULL} on success. On error this returns an error |
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1450 message and sets @code{*@var{err}} to an errno value or @code{0} if |
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1451 there is no relevant errno. |
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1452 |
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1453 @end deftypefn |
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1454 |
0 | 1455 @c snprintf.c:28 |
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1456 @deftypefn Supplemental int snprintf (char *@var{buf}, size_t @var{n}, @ |
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1457 const char *@var{format}, ...) |
0 | 1458 |
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1459 This function is similar to @code{sprintf}, but it will write to |
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1460 @var{buf} at most @code{@var{n}-1} bytes of text, followed by a |
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1461 terminating null byte, for a total of @var{n} bytes. |
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1462 On error the return value is -1, otherwise it returns the number of |
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1463 bytes, not including the terminating null byte, that would have been |
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1464 written had @var{n} been sufficiently large, regardless of the actual |
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1465 value of @var{n}. Note some pre-C99 system libraries do not implement |
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1466 this correctly so users cannot generally rely on the return value if |
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1467 the system version of this function is used. |
0 | 1468 |
1469 @end deftypefn | |
1470 | |
1471 @c spaces.c:22 | |
1472 @deftypefn Extension char* spaces (int @var{count}) | |
1473 | |
1474 Returns a pointer to a memory region filled with the specified | |
1475 number of spaces and null terminated. The returned pointer is | |
1476 valid until at least the next call. | |
1477 | |
1478 @end deftypefn | |
1479 | |
145 | 1480 @c splay-tree.c:305 |
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1481 @deftypefn Supplemental splay_tree splay_tree_new_with_typed_alloc @ |
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1482 (splay_tree_compare_fn @var{compare_fn}, @ |
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1483 splay_tree_delete_key_fn @var{delete_key_fn}, @ |
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1484 splay_tree_delete_value_fn @var{delete_value_fn}, @ |
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1485 splay_tree_allocate_fn @var{tree_allocate_fn}, @ |
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1486 splay_tree_allocate_fn @var{node_allocate_fn}, @ |
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1487 splay_tree_deallocate_fn @var{deallocate_fn}, @ |
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1488 void * @var{allocate_data}) |
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1489 |
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1490 This function creates a splay tree that uses two different allocators |
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1491 @var{tree_allocate_fn} and @var{node_allocate_fn} to use for allocating the |
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1492 tree itself and its nodes respectively. This is useful when variables of |
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1493 different types need to be allocated with different allocators. |
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1494 |
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1495 The splay tree will use @var{compare_fn} to compare nodes, |
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1496 @var{delete_key_fn} to deallocate keys, and @var{delete_value_fn} to |
145 | 1497 deallocate values. Keys and values will be deallocated when the |
1498 tree is deleted using splay_tree_delete or when a node is removed | |
1499 using splay_tree_remove. splay_tree_insert will release the previously | |
1500 inserted key and value using @var{delete_key_fn} and @var{delete_value_fn} | |
1501 if the inserted key is already found in the tree. | |
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1502 |
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1503 @end deftypefn |
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1504 |
111 | 1505 @c stack-limit.c:28 |
1506 @deftypefn Extension void stack_limit_increase (unsigned long @var{pref}) | |
1507 | |
1508 Attempt to increase stack size limit to @var{pref} bytes if possible. | |
1509 | |
1510 @end deftypefn | |
1511 | |
0 | 1512 @c stpcpy.c:23 |
1513 @deftypefn Supplemental char* stpcpy (char *@var{dst}, const char *@var{src}) | |
1514 | |
1515 Copies the string @var{src} into @var{dst}. Returns a pointer to | |
1516 @var{dst} + strlen(@var{src}). | |
1517 | |
1518 @end deftypefn | |
1519 | |
1520 @c stpncpy.c:23 | |
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1521 @deftypefn Supplemental char* stpncpy (char *@var{dst}, const char *@var{src}, @ |
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1522 size_t @var{len}) |
0 | 1523 |
1524 Copies the string @var{src} into @var{dst}, copying exactly @var{len} | |
1525 and padding with zeros if necessary. If @var{len} < strlen(@var{src}) | |
1526 then return @var{dst} + @var{len}, otherwise returns @var{dst} + | |
1527 strlen(@var{src}). | |
1528 | |
1529 @end deftypefn | |
1530 | |
1531 @c strcasecmp.c:15 | |
1532 @deftypefn Supplemental int strcasecmp (const char *@var{s1}, const char *@var{s2}) | |
1533 | |
1534 A case-insensitive @code{strcmp}. | |
1535 | |
1536 @end deftypefn | |
1537 | |
1538 @c strchr.c:6 | |
1539 @deftypefn Supplemental char* strchr (const char *@var{s}, int @var{c}) | |
1540 | |
1541 Returns a pointer to the first occurrence of the character @var{c} in | |
1542 the string @var{s}, or @code{NULL} if not found. If @var{c} is itself the | |
1543 null character, the results are undefined. | |
1544 | |
1545 @end deftypefn | |
1546 | |
1547 @c strdup.c:3 | |
1548 @deftypefn Supplemental char* strdup (const char *@var{s}) | |
1549 | |
1550 Returns a pointer to a copy of @var{s} in memory obtained from | |
1551 @code{malloc}, or @code{NULL} if insufficient memory was available. | |
1552 | |
1553 @end deftypefn | |
1554 | |
145 | 1555 @c strerror.c:675 |
0 | 1556 @deftypefn Replacement {const char*} strerrno (int @var{errnum}) |
1557 | |
1558 Given an error number returned from a system call (typically returned | |
1559 in @code{errno}), returns a pointer to a string containing the | |
1560 symbolic name of that error number, as found in @code{<errno.h>}. | |
1561 | |
1562 If the supplied error number is within the valid range of indices for | |
1563 symbolic names, but no name is available for the particular error | |
1564 number, then returns the string @samp{Error @var{num}}, where @var{num} | |
1565 is the error number. | |
1566 | |
1567 If the supplied error number is not within the range of valid | |
1568 indices, then returns @code{NULL}. | |
1569 | |
1570 The contents of the location pointed to are only guaranteed to be | |
1571 valid until the next call to @code{strerrno}. | |
1572 | |
1573 @end deftypefn | |
1574 | |
145 | 1575 @c strerror.c:608 |
0 | 1576 @deftypefn Supplemental char* strerror (int @var{errnoval}) |
1577 | |
1578 Maps an @code{errno} number to an error message string, the contents | |
1579 of which are implementation defined. On systems which have the | |
1580 external variables @code{sys_nerr} and @code{sys_errlist}, these | |
1581 strings will be the same as the ones used by @code{perror}. | |
1582 | |
1583 If the supplied error number is within the valid range of indices for | |
1584 the @code{sys_errlist}, but no message is available for the particular | |
1585 error number, then returns the string @samp{Error @var{num}}, where | |
1586 @var{num} is the error number. | |
1587 | |
1588 If the supplied error number is not a valid index into | |
1589 @code{sys_errlist}, returns @code{NULL}. | |
1590 | |
1591 The returned string is only guaranteed to be valid only until the | |
1592 next call to @code{strerror}. | |
1593 | |
1594 @end deftypefn | |
1595 | |
1596 @c strncasecmp.c:15 | |
1597 @deftypefn Supplemental int strncasecmp (const char *@var{s1}, const char *@var{s2}) | |
1598 | |
1599 A case-insensitive @code{strncmp}. | |
1600 | |
1601 @end deftypefn | |
1602 | |
1603 @c strncmp.c:6 | |
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1604 @deftypefn Supplemental int strncmp (const char *@var{s1}, @ |
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1605 const char *@var{s2}, size_t @var{n}) |
0 | 1606 |
1607 Compares the first @var{n} bytes of two strings, returning a value as | |
1608 @code{strcmp}. | |
1609 | |
1610 @end deftypefn | |
1611 | |
1612 @c strndup.c:23 | |
1613 @deftypefn Extension char* strndup (const char *@var{s}, size_t @var{n}) | |
1614 | |
1615 Returns a pointer to a copy of @var{s} with at most @var{n} characters | |
1616 in memory obtained from @code{malloc}, or @code{NULL} if insufficient | |
1617 memory was available. The result is always NUL terminated. | |
1618 | |
1619 @end deftypefn | |
1620 | |
111 | 1621 @c strnlen.c:6 |
1622 @deftypefn Supplemental size_t strnlen (const char *@var{s}, size_t @var{maxlen}) | |
1623 | |
1624 Returns the length of @var{s}, as with @code{strlen}, but never looks | |
1625 past the first @var{maxlen} characters in the string. If there is no | |
1626 '\0' character in the first @var{maxlen} characters, returns | |
1627 @var{maxlen}. | |
1628 | |
1629 @end deftypefn | |
1630 | |
0 | 1631 @c strrchr.c:6 |
1632 @deftypefn Supplemental char* strrchr (const char *@var{s}, int @var{c}) | |
1633 | |
1634 Returns a pointer to the last occurrence of the character @var{c} in | |
1635 the string @var{s}, or @code{NULL} if not found. If @var{c} is itself the | |
1636 null character, the results are undefined. | |
1637 | |
1638 @end deftypefn | |
1639 | |
1640 @c strsignal.c:383 | |
1641 @deftypefn Supplemental {const char *} strsignal (int @var{signo}) | |
1642 | |
1643 Maps an signal number to an signal message string, the contents of | |
1644 which are implementation defined. On systems which have the external | |
1645 variable @code{sys_siglist}, these strings will be the same as the | |
1646 ones used by @code{psignal()}. | |
1647 | |
1648 If the supplied signal number is within the valid range of indices for | |
1649 the @code{sys_siglist}, but no message is available for the particular | |
1650 signal number, then returns the string @samp{Signal @var{num}}, where | |
1651 @var{num} is the signal number. | |
1652 | |
1653 If the supplied signal number is not a valid index into | |
1654 @code{sys_siglist}, returns @code{NULL}. | |
1655 | |
1656 The returned string is only guaranteed to be valid only until the next | |
1657 call to @code{strsignal}. | |
1658 | |
1659 @end deftypefn | |
1660 | |
1661 @c strsignal.c:448 | |
1662 @deftypefn Extension {const char*} strsigno (int @var{signo}) | |
1663 | |
1664 Given an signal number, returns a pointer to a string containing the | |
1665 symbolic name of that signal number, as found in @code{<signal.h>}. | |
1666 | |
1667 If the supplied signal number is within the valid range of indices for | |
1668 symbolic names, but no name is available for the particular signal | |
1669 number, then returns the string @samp{Signal @var{num}}, where | |
1670 @var{num} is the signal number. | |
1671 | |
1672 If the supplied signal number is not within the range of valid | |
1673 indices, then returns @code{NULL}. | |
1674 | |
1675 The contents of the location pointed to are only guaranteed to be | |
1676 valid until the next call to @code{strsigno}. | |
1677 | |
1678 @end deftypefn | |
1679 | |
1680 @c strstr.c:6 | |
1681 @deftypefn Supplemental char* strstr (const char *@var{string}, const char *@var{sub}) | |
1682 | |
1683 This function searches for the substring @var{sub} in the string | |
1684 @var{string}, not including the terminating null characters. A pointer | |
1685 to the first occurrence of @var{sub} is returned, or @code{NULL} if the | |
1686 substring is absent. If @var{sub} points to a string with zero | |
1687 length, the function returns @var{string}. | |
1688 | |
1689 @end deftypefn | |
1690 | |
1691 @c strtod.c:27 | |
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1692 @deftypefn Supplemental double strtod (const char *@var{string}, @ |
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1693 char **@var{endptr}) |
0 | 1694 |
1695 This ISO C function converts the initial portion of @var{string} to a | |
1696 @code{double}. If @var{endptr} is not @code{NULL}, a pointer to the | |
1697 character after the last character used in the conversion is stored in | |
1698 the location referenced by @var{endptr}. If no conversion is | |
1699 performed, zero is returned and the value of @var{string} is stored in | |
1700 the location referenced by @var{endptr}. | |
1701 | |
1702 @end deftypefn | |
1703 | |
145 | 1704 @c strerror.c:734 |
0 | 1705 @deftypefn Extension int strtoerrno (const char *@var{name}) |
1706 | |
1707 Given the symbolic name of a error number (e.g., @code{EACCES}), map it | |
1708 to an errno value. If no translation is found, returns 0. | |
1709 | |
1710 @end deftypefn | |
1711 | |
1712 @c strtol.c:33 | |
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1713 @deftypefn Supplemental {long int} strtol (const char *@var{string}, @ |
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1714 char **@var{endptr}, int @var{base}) |
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1715 @deftypefnx Supplemental {unsigned long int} strtoul (const char *@var{string}, @ |
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1716 char **@var{endptr}, int @var{base}) |
0 | 1717 |
1718 The @code{strtol} function converts the string in @var{string} to a | |
1719 long integer value according to the given @var{base}, which must be | |
1720 between 2 and 36 inclusive, or be the special value 0. If @var{base} | |
1721 is 0, @code{strtol} will look for the prefixes @code{0} and @code{0x} | |
1722 to indicate bases 8 and 16, respectively, else default to base 10. | |
1723 When the base is 16 (either explicitly or implicitly), a prefix of | |
1724 @code{0x} is allowed. The handling of @var{endptr} is as that of | |
1725 @code{strtod} above. The @code{strtoul} function is the same, except | |
1726 that the converted value is unsigned. | |
1727 | |
1728 @end deftypefn | |
1729 | |
111 | 1730 @c strtoll.c:33 |
1731 @deftypefn Supplemental {long long int} strtoll (const char *@var{string}, @ | |
1732 char **@var{endptr}, int @var{base}) | |
1733 @deftypefnx Supplemental {unsigned long long int} strtoul (@ | |
1734 const char *@var{string}, char **@var{endptr}, int @var{base}) | |
1735 | |
1736 The @code{strtoll} function converts the string in @var{string} to a | |
1737 long long integer value according to the given @var{base}, which must be | |
1738 between 2 and 36 inclusive, or be the special value 0. If @var{base} | |
1739 is 0, @code{strtoll} will look for the prefixes @code{0} and @code{0x} | |
1740 to indicate bases 8 and 16, respectively, else default to base 10. | |
1741 When the base is 16 (either explicitly or implicitly), a prefix of | |
1742 @code{0x} is allowed. The handling of @var{endptr} is as that of | |
1743 @code{strtod} above. The @code{strtoull} function is the same, except | |
1744 that the converted value is unsigned. | |
1745 | |
1746 @end deftypefn | |
1747 | |
0 | 1748 @c strsignal.c:502 |
1749 @deftypefn Extension int strtosigno (const char *@var{name}) | |
1750 | |
1751 Given the symbolic name of a signal, map it to a signal number. If no | |
1752 translation is found, returns 0. | |
1753 | |
1754 @end deftypefn | |
1755 | |
1756 @c strverscmp.c:25 | |
1757 @deftypefun int strverscmp (const char *@var{s1}, const char *@var{s2}) | |
1758 The @code{strverscmp} function compares the string @var{s1} against | |
1759 @var{s2}, considering them as holding indices/version numbers. Return | |
1760 value follows the same conventions as found in the @code{strverscmp} | |
1761 function. In fact, if @var{s1} and @var{s2} contain no digits, | |
1762 @code{strverscmp} behaves like @code{strcmp}. | |
1763 | |
1764 Basically, we compare strings normally (character by character), until | |
1765 we find a digit in each string - then we enter a special comparison | |
1766 mode, where each sequence of digits is taken as a whole. If we reach the | |
1767 end of these two parts without noticing a difference, we return to the | |
1768 standard comparison mode. There are two types of numeric parts: | |
1769 "integral" and "fractional" (those begin with a '0'). The types | |
1770 of the numeric parts affect the way we sort them: | |
1771 | |
1772 @itemize @bullet | |
1773 @item | |
1774 integral/integral: we compare values as you would expect. | |
1775 | |
1776 @item | |
1777 fractional/integral: the fractional part is less than the integral one. | |
1778 Again, no surprise. | |
1779 | |
1780 @item | |
1781 fractional/fractional: the things become a bit more complex. | |
1782 If the common prefix contains only leading zeroes, the longest part is less | |
1783 than the other one; else the comparison behaves normally. | |
1784 @end itemize | |
1785 | |
1786 @smallexample | |
1787 strverscmp ("no digit", "no digit") | |
1788 @result{} 0 // @r{same behavior as strcmp.} | |
1789 strverscmp ("item#99", "item#100") | |
1790 @result{} <0 // @r{same prefix, but 99 < 100.} | |
1791 strverscmp ("alpha1", "alpha001") | |
1792 @result{} >0 // @r{fractional part inferior to integral one.} | |
1793 strverscmp ("part1_f012", "part1_f01") | |
1794 @result{} >0 // @r{two fractional parts.} | |
1795 strverscmp ("foo.009", "foo.0") | |
1796 @result{} <0 // @r{idem, but with leading zeroes only.} | |
1797 @end smallexample | |
1798 | |
1799 This function is especially useful when dealing with filename sorting, | |
1800 because filenames frequently hold indices/version numbers. | |
1801 @end deftypefun | |
1802 | |
111 | 1803 @c timeval-utils.c:43 |
1804 @deftypefn Extension void timeval_add (struct timeval *@var{a}, @ | |
1805 struct timeval *@var{b}, struct timeval *@var{result}) | |
1806 | |
1807 Adds @var{a} to @var{b} and stores the result in @var{result}. | |
1808 | |
1809 @end deftypefn | |
1810 | |
1811 @c timeval-utils.c:67 | |
1812 @deftypefn Extension void timeval_sub (struct timeval *@var{a}, @ | |
1813 struct timeval *@var{b}, struct timeval *@var{result}) | |
1814 | |
1815 Subtracts @var{b} from @var{a} and stores the result in @var{result}. | |
1816 | |
1817 @end deftypefn | |
1818 | |
0 | 1819 @c tmpnam.c:3 |
1820 @deftypefn Supplemental char* tmpnam (char *@var{s}) | |
1821 | |
1822 This function attempts to create a name for a temporary file, which | |
1823 will be a valid file name yet not exist when @code{tmpnam} checks for | |
1824 it. @var{s} must point to a buffer of at least @code{L_tmpnam} bytes, | |
1825 or be @code{NULL}. Use of this function creates a security risk, and it must | |
1826 not be used in new projects. Use @code{mkstemp} instead. | |
1827 | |
1828 @end deftypefn | |
1829 | |
1830 @c unlink-if-ordinary.c:27 | |
1831 @deftypefn Supplemental int unlink_if_ordinary (const char*) | |
1832 | |
1833 Unlinks the named file, unless it is special (e.g. a device file). | |
1834 Returns 0 when the file was unlinked, a negative value (and errno set) when | |
1835 there was an error deleting the file, and a positive value if no attempt | |
1836 was made to unlink the file because it is special. | |
1837 | |
1838 @end deftypefn | |
1839 | |
1840 @c fopen_unlocked.c:31 | |
1841 @deftypefn Extension void unlock_std_streams (void) | |
1842 | |
1843 If the OS supports it, ensure that the standard I/O streams, | |
1844 @code{stdin}, @code{stdout} and @code{stderr} are setup to avoid any | |
1845 multi-threaded locking. Otherwise do nothing. | |
1846 | |
1847 @end deftypefn | |
1848 | |
1849 @c fopen_unlocked.c:23 | |
1850 @deftypefn Extension void unlock_stream (FILE * @var{stream}) | |
1851 | |
1852 If the OS supports it, ensure that the supplied stream is setup to | |
1853 avoid any multi-threaded locking. Otherwise leave the @code{FILE} | |
1854 pointer unchanged. If the @var{stream} is @code{NULL} do nothing. | |
1855 | |
1856 @end deftypefn | |
1857 | |
1858 @c vasprintf.c:47 | |
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1859 @deftypefn Extension int vasprintf (char **@var{resptr}, @ |
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1860 const char *@var{format}, va_list @var{args}) |
0 | 1861 |
1862 Like @code{vsprintf}, but instead of passing a pointer to a buffer, | |
1863 you pass a pointer to a pointer. This function will compute the size | |
1864 of the buffer needed, allocate memory with @code{malloc}, and store a | |
1865 pointer to the allocated memory in @code{*@var{resptr}}. The value | |
1866 returned is the same as @code{vsprintf} would return. If memory could | |
1867 not be allocated, minus one is returned and @code{NULL} is stored in | |
1868 @code{*@var{resptr}}. | |
1869 | |
1870 @end deftypefn | |
1871 | |
1872 @c vfork.c:6 | |
1873 @deftypefn Supplemental int vfork (void) | |
1874 | |
1875 Emulates @code{vfork} by calling @code{fork} and returning its value. | |
1876 | |
1877 @end deftypefn | |
1878 | |
1879 @c vprintf.c:3 | |
1880 @deftypefn Supplemental int vprintf (const char *@var{format}, va_list @var{ap}) | |
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1881 @deftypefnx Supplemental int vfprintf (FILE *@var{stream}, @ |
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1882 const char *@var{format}, va_list @var{ap}) |
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1883 @deftypefnx Supplemental int vsprintf (char *@var{str}, @ |
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1884 const char *@var{format}, va_list @var{ap}) |
0 | 1885 |
1886 These functions are the same as @code{printf}, @code{fprintf}, and | |
1887 @code{sprintf}, respectively, except that they are called with a | |
1888 @code{va_list} instead of a variable number of arguments. Note that | |
1889 they do not call @code{va_end}; this is the application's | |
1890 responsibility. In @libib{} they are implemented in terms of the | |
1891 nonstandard but common function @code{_doprnt}. | |
1892 | |
1893 @end deftypefn | |
1894 | |
1895 @c vsnprintf.c:28 | |
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1896 @deftypefn Supplemental int vsnprintf (char *@var{buf}, size_t @var{n}, @ |
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1897 const char *@var{format}, va_list @var{ap}) |
0 | 1898 |
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1899 This function is similar to @code{vsprintf}, but it will write to |
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1900 @var{buf} at most @code{@var{n}-1} bytes of text, followed by a |
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1901 terminating null byte, for a total of @var{n} bytes. On error the |
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1902 return value is -1, otherwise it returns the number of characters that |
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1903 would have been printed had @var{n} been sufficiently large, |
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1904 regardless of the actual value of @var{n}. Note some pre-C99 system |
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1905 libraries do not implement this correctly so users cannot generally |
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1906 rely on the return value if the system version of this function is |
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1907 used. |
0 | 1908 |
1909 @end deftypefn | |
1910 | |
1911 @c waitpid.c:3 | |
1912 @deftypefn Supplemental int waitpid (int @var{pid}, int *@var{status}, int) | |
1913 | |
1914 This is a wrapper around the @code{wait} function. Any ``special'' | |
1915 values of @var{pid} depend on your implementation of @code{wait}, as | |
1916 does the return value. The third argument is unused in @libib{}. | |
1917 | |
1918 @end deftypefn | |
1919 | |
145 | 1920 @c argv.c:289 |
111 | 1921 @deftypefn Extension int writeargv (char * const *@var{argv}, FILE *@var{file}) |
0 | 1922 |
1923 Write each member of ARGV, handling all necessary quoting, to the file | |
1924 named by FILE, separated by whitespace. Return 0 on success, non-zero | |
1925 if an error occurred while writing to FILE. | |
1926 | |
1927 @end deftypefn | |
1928 | |
111 | 1929 @c xasprintf.c:31 |
1930 @deftypefn Replacement char* xasprintf (const char *@var{format}, ...) | |
1931 | |
1932 Print to allocated string without fail. If @code{xasprintf} fails, | |
1933 this will print a message to @code{stderr} (using the name set by | |
1934 @code{xmalloc_set_program_name}, if any) and then call @code{xexit}. | |
1935 | |
1936 @end deftypefn | |
1937 | |
0 | 1938 @c xatexit.c:11 |
1939 @deftypefun int xatexit (void (*@var{fn}) (void)) | |
1940 | |
1941 Behaves as the standard @code{atexit} function, but with no limit on | |
1942 the number of registered functions. Returns 0 on success, or @minus{}1 on | |
1943 failure. If you use @code{xatexit} to register functions, you must use | |
1944 @code{xexit} to terminate your program. | |
1945 | |
1946 @end deftypefun | |
1947 | |
1948 @c xmalloc.c:38 | |
1949 @deftypefn Replacement void* xcalloc (size_t @var{nelem}, size_t @var{elsize}) | |
1950 | |
1951 Allocate memory without fail, and set it to zero. This routine functions | |
1952 like @code{calloc}, but will behave the same as @code{xmalloc} if memory | |
1953 cannot be found. | |
1954 | |
1955 @end deftypefn | |
1956 | |
1957 @c xexit.c:22 | |
1958 @deftypefn Replacement void xexit (int @var{code}) | |
1959 | |
1960 Terminates the program. If any functions have been registered with | |
1961 the @code{xatexit} replacement function, they will be called first. | |
1962 Termination is handled via the system's normal @code{exit} call. | |
1963 | |
1964 @end deftypefn | |
1965 | |
1966 @c xmalloc.c:22 | |
1967 @deftypefn Replacement void* xmalloc (size_t) | |
1968 | |
1969 Allocate memory without fail. If @code{malloc} fails, this will print | |
1970 a message to @code{stderr} (using the name set by | |
1971 @code{xmalloc_set_program_name}, | |
1972 if any) and then call @code{xexit}. Note that it is therefore safe for | |
1973 a program to contain @code{#define malloc xmalloc} in its source. | |
1974 | |
1975 @end deftypefn | |
1976 | |
1977 @c xmalloc.c:53 | |
1978 @deftypefn Replacement void xmalloc_failed (size_t) | |
1979 | |
1980 This function is not meant to be called by client code, and is listed | |
1981 here for completeness only. If any of the allocation routines fail, this | |
1982 function will be called to print an error message and terminate execution. | |
1983 | |
1984 @end deftypefn | |
1985 | |
1986 @c xmalloc.c:46 | |
1987 @deftypefn Replacement void xmalloc_set_program_name (const char *@var{name}) | |
1988 | |
1989 You can use this to set the name of the program used by | |
1990 @code{xmalloc_failed} when printing a failure message. | |
1991 | |
1992 @end deftypefn | |
1993 | |
1994 @c xmemdup.c:7 | |
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1995 @deftypefn Replacement void* xmemdup (void *@var{input}, @ |
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1996 size_t @var{copy_size}, size_t @var{alloc_size}) |
0 | 1997 |
1998 Duplicates a region of memory without fail. First, @var{alloc_size} bytes | |
1999 are allocated, then @var{copy_size} bytes from @var{input} are copied into | |
2000 it, and the new memory is returned. If fewer bytes are copied than were | |
2001 allocated, the remaining memory is zeroed. | |
2002 | |
2003 @end deftypefn | |
2004 | |
2005 @c xmalloc.c:32 | |
2006 @deftypefn Replacement void* xrealloc (void *@var{ptr}, size_t @var{size}) | |
2007 Reallocate memory without fail. This routine functions like @code{realloc}, | |
2008 but will behave the same as @code{xmalloc} if memory cannot be found. | |
2009 | |
2010 @end deftypefn | |
2011 | |
2012 @c xstrdup.c:7 | |
2013 @deftypefn Replacement char* xstrdup (const char *@var{s}) | |
2014 | |
2015 Duplicates a character string without fail, using @code{xmalloc} to | |
2016 obtain memory. | |
2017 | |
2018 @end deftypefn | |
2019 | |
2020 @c xstrerror.c:7 | |
2021 @deftypefn Replacement char* xstrerror (int @var{errnum}) | |
2022 | |
2023 Behaves exactly like the standard @code{strerror} function, but | |
2024 will never return a @code{NULL} pointer. | |
2025 | |
2026 @end deftypefn | |
2027 | |
2028 @c xstrndup.c:23 | |
2029 @deftypefn Replacement char* xstrndup (const char *@var{s}, size_t @var{n}) | |
2030 | |
2031 Returns a pointer to a copy of @var{s} with at most @var{n} characters | |
2032 without fail, using @code{xmalloc} to obtain memory. The result is | |
2033 always NUL terminated. | |
2034 | |
2035 @end deftypefn | |
2036 | |
111 | 2037 @c xvasprintf.c:38 |
2038 @deftypefn Replacement char* xvasprintf (const char *@var{format}, va_list @var{args}) | |
2039 | |
2040 Print to allocated string without fail. If @code{xvasprintf} fails, | |
2041 this will print a message to @code{stderr} (using the name set by | |
2042 @code{xmalloc_set_program_name}, if any) and then call @code{xexit}. | |
2043 | |
2044 @end deftypefn | |
2045 | |
2046 |