|
0
|
1 /* Extended support for using signal values.
|
|
|
2 Written by Fred Fish. fnf@cygnus.com
|
|
|
3 This file is in the public domain. */
|
|
|
4
|
|
|
5 #include "config.h"
|
|
|
6 #include "ansidecl.h"
|
|
|
7 #include "libiberty.h"
|
|
|
8
|
|
|
9 /* We need to declare sys_siglist, because even if the system provides
|
|
|
10 it we can't assume that it is declared in <signal.h> (for example,
|
|
|
11 SunOS provides sys_siglist, but it does not declare it in any
|
|
|
12 header file). However, we can't declare sys_siglist portably,
|
|
|
13 because on some systems it is declared with const and on some
|
|
|
14 systems it is declared without const. If we were using autoconf,
|
|
|
15 we could work out the right declaration. Until, then we just
|
|
|
16 ignore any declaration in the system header files, and always
|
|
|
17 declare it ourselves. With luck, this will always work. */
|
|
|
18 #define sys_siglist no_such_symbol
|
|
|
19 #define sys_nsig sys_nsig__no_such_symbol
|
|
|
20
|
|
|
21 #include <stdio.h>
|
|
|
22 #include <signal.h>
|
|
|
23
|
|
|
24 /* Routines imported from standard C runtime libraries. */
|
|
|
25
|
|
|
26 #ifdef HAVE_STDLIB_H
|
|
|
27 #include <stdlib.h>
|
|
|
28 #else
|
|
|
29 extern PTR malloc ();
|
|
|
30 #endif
|
|
|
31
|
|
|
32 #ifdef HAVE_STRING_H
|
|
|
33 #include <string.h>
|
|
|
34 #else
|
|
|
35 extern PTR memset ();
|
|
|
36 #endif
|
|
|
37
|
|
|
38 /* Undefine the macro we used to hide the definition of sys_siglist
|
|
|
39 found in the system header files. */
|
|
|
40 #undef sys_siglist
|
|
|
41 #undef sys_nsig
|
|
|
42
|
|
|
43 #ifndef NULL
|
|
|
44 # define NULL (void *) 0
|
|
|
45 #endif
|
|
|
46
|
|
|
47 #ifndef MAX
|
|
|
48 # define MAX(a,b) ((a) > (b) ? (a) : (b))
|
|
|
49 #endif
|
|
|
50
|
|
|
51 static void init_signal_tables (void);
|
|
|
52
|
|
|
53 /* Translation table for signal values.
|
|
|
54
|
|
|
55 Note that this table is generally only accessed when it is used at runtime
|
|
|
56 to initialize signal name and message tables that are indexed by signal
|
|
|
57 value.
|
|
|
58
|
|
|
59 Not all of these signals will exist on all systems. This table is the only
|
|
|
60 thing that should have to be updated as new signal numbers are introduced.
|
|
|
61 It's sort of ugly, but at least its portable. */
|
|
|
62
|
|
|
63 struct signal_info
|
|
|
64 {
|
|
|
65 const int value; /* The numeric value from <signal.h> */
|
|
|
66 const char *const name; /* The equivalent symbolic value */
|
|
|
67 #ifndef HAVE_SYS_SIGLIST
|
|
|
68 const char *const msg; /* Short message about this value */
|
|
|
69 #endif
|
|
|
70 };
|
|
|
71
|
|
|
72 #ifndef HAVE_SYS_SIGLIST
|
|
|
73 # define ENTRY(value, name, msg) {value, name, msg}
|
|
|
74 #else
|
|
|
75 # define ENTRY(value, name, msg) {value, name}
|
|
|
76 #endif
|
|
|
77
|
|
|
78 static const struct signal_info signal_table[] =
|
|
|
79 {
|
|
|
80 #if defined (SIGHUP)
|
|
|
81 ENTRY(SIGHUP, "SIGHUP", "Hangup"),
|
|
|
82 #endif
|
|
|
83 #if defined (SIGINT)
|
|
|
84 ENTRY(SIGINT, "SIGINT", "Interrupt"),
|
|
|
85 #endif
|
|
|
86 #if defined (SIGQUIT)
|
|
|
87 ENTRY(SIGQUIT, "SIGQUIT", "Quit"),
|
|
|
88 #endif
|
|
|
89 #if defined (SIGILL)
|
|
|
90 ENTRY(SIGILL, "SIGILL", "Illegal instruction"),
|
|
|
91 #endif
|
|
|
92 #if defined (SIGTRAP)
|
|
|
93 ENTRY(SIGTRAP, "SIGTRAP", "Trace/breakpoint trap"),
|
|
|
94 #endif
|
|
|
95 /* Put SIGIOT before SIGABRT, so that if SIGIOT==SIGABRT then SIGABRT
|
|
|
96 overrides SIGIOT. SIGABRT is in ANSI and POSIX.1, and SIGIOT isn't. */
|
|
|
97 #if defined (SIGIOT)
|
|
|
98 ENTRY(SIGIOT, "SIGIOT", "IOT trap"),
|
|
|
99 #endif
|
|
|
100 #if defined (SIGABRT)
|
|
|
101 ENTRY(SIGABRT, "SIGABRT", "Aborted"),
|
|
|
102 #endif
|
|
|
103 #if defined (SIGEMT)
|
|
|
104 ENTRY(SIGEMT, "SIGEMT", "Emulation trap"),
|
|
|
105 #endif
|
|
|
106 #if defined (SIGFPE)
|
|
|
107 ENTRY(SIGFPE, "SIGFPE", "Arithmetic exception"),
|
|
|
108 #endif
|
|
|
109 #if defined (SIGKILL)
|
|
|
110 ENTRY(SIGKILL, "SIGKILL", "Killed"),
|
|
|
111 #endif
|
|
|
112 #if defined (SIGBUS)
|
|
|
113 ENTRY(SIGBUS, "SIGBUS", "Bus error"),
|
|
|
114 #endif
|
|
|
115 #if defined (SIGSEGV)
|
|
|
116 ENTRY(SIGSEGV, "SIGSEGV", "Segmentation fault"),
|
|
|
117 #endif
|
|
|
118 #if defined (SIGSYS)
|
|
|
119 ENTRY(SIGSYS, "SIGSYS", "Bad system call"),
|
|
|
120 #endif
|
|
|
121 #if defined (SIGPIPE)
|
|
|
122 ENTRY(SIGPIPE, "SIGPIPE", "Broken pipe"),
|
|
|
123 #endif
|
|
|
124 #if defined (SIGALRM)
|
|
|
125 ENTRY(SIGALRM, "SIGALRM", "Alarm clock"),
|
|
|
126 #endif
|
|
|
127 #if defined (SIGTERM)
|
|
|
128 ENTRY(SIGTERM, "SIGTERM", "Terminated"),
|
|
|
129 #endif
|
|
|
130 #if defined (SIGUSR1)
|
|
|
131 ENTRY(SIGUSR1, "SIGUSR1", "User defined signal 1"),
|
|
|
132 #endif
|
|
|
133 #if defined (SIGUSR2)
|
|
|
134 ENTRY(SIGUSR2, "SIGUSR2", "User defined signal 2"),
|
|
|
135 #endif
|
|
|
136 /* Put SIGCLD before SIGCHLD, so that if SIGCLD==SIGCHLD then SIGCHLD
|
|
|
137 overrides SIGCLD. SIGCHLD is in POXIX.1 */
|
|
|
138 #if defined (SIGCLD)
|
|
|
139 ENTRY(SIGCLD, "SIGCLD", "Child status changed"),
|
|
|
140 #endif
|
|
|
141 #if defined (SIGCHLD)
|
|
|
142 ENTRY(SIGCHLD, "SIGCHLD", "Child status changed"),
|
|
|
143 #endif
|
|
|
144 #if defined (SIGPWR)
|
|
|
145 ENTRY(SIGPWR, "SIGPWR", "Power fail/restart"),
|
|
|
146 #endif
|
|
|
147 #if defined (SIGWINCH)
|
|
|
148 ENTRY(SIGWINCH, "SIGWINCH", "Window size changed"),
|
|
|
149 #endif
|
|
|
150 #if defined (SIGURG)
|
|
|
151 ENTRY(SIGURG, "SIGURG", "Urgent I/O condition"),
|
|
|
152 #endif
|
|
|
153 #if defined (SIGIO)
|
|
|
154 /* "I/O pending" has also been suggested, but is misleading since the
|
|
|
155 signal only happens when the process has asked for it, not everytime
|
|
|
156 I/O is pending. */
|
|
|
157 ENTRY(SIGIO, "SIGIO", "I/O possible"),
|
|
|
158 #endif
|
|
|
159 #if defined (SIGPOLL)
|
|
|
160 ENTRY(SIGPOLL, "SIGPOLL", "Pollable event occurred"),
|
|
|
161 #endif
|
|
|
162 #if defined (SIGSTOP)
|
|
|
163 ENTRY(SIGSTOP, "SIGSTOP", "Stopped (signal)"),
|
|
|
164 #endif
|
|
|
165 #if defined (SIGTSTP)
|
|
|
166 ENTRY(SIGTSTP, "SIGTSTP", "Stopped (user)"),
|
|
|
167 #endif
|
|
|
168 #if defined (SIGCONT)
|
|
|
169 ENTRY(SIGCONT, "SIGCONT", "Continued"),
|
|
|
170 #endif
|
|
|
171 #if defined (SIGTTIN)
|
|
|
172 ENTRY(SIGTTIN, "SIGTTIN", "Stopped (tty input)"),
|
|
|
173 #endif
|
|
|
174 #if defined (SIGTTOU)
|
|
|
175 ENTRY(SIGTTOU, "SIGTTOU", "Stopped (tty output)"),
|
|
|
176 #endif
|
|
|
177 #if defined (SIGVTALRM)
|
|
|
178 ENTRY(SIGVTALRM, "SIGVTALRM", "Virtual timer expired"),
|
|
|
179 #endif
|
|
|
180 #if defined (SIGPROF)
|
|
|
181 ENTRY(SIGPROF, "SIGPROF", "Profiling timer expired"),
|
|
|
182 #endif
|
|
|
183 #if defined (SIGXCPU)
|
|
|
184 ENTRY(SIGXCPU, "SIGXCPU", "CPU time limit exceeded"),
|
|
|
185 #endif
|
|
|
186 #if defined (SIGXFSZ)
|
|
|
187 ENTRY(SIGXFSZ, "SIGXFSZ", "File size limit exceeded"),
|
|
|
188 #endif
|
|
|
189 #if defined (SIGWIND)
|
|
|
190 ENTRY(SIGWIND, "SIGWIND", "SIGWIND"),
|
|
|
191 #endif
|
|
|
192 #if defined (SIGPHONE)
|
|
|
193 ENTRY(SIGPHONE, "SIGPHONE", "SIGPHONE"),
|
|
|
194 #endif
|
|
|
195 #if defined (SIGLOST)
|
|
|
196 ENTRY(SIGLOST, "SIGLOST", "Resource lost"),
|
|
|
197 #endif
|
|
|
198 #if defined (SIGWAITING)
|
|
|
199 ENTRY(SIGWAITING, "SIGWAITING", "Process's LWPs are blocked"),
|
|
|
200 #endif
|
|
|
201 #if defined (SIGLWP)
|
|
|
202 ENTRY(SIGLWP, "SIGLWP", "Signal LWP"),
|
|
|
203 #endif
|
|
|
204 #if defined (SIGDANGER)
|
|
|
205 ENTRY(SIGDANGER, "SIGDANGER", "Swap space dangerously low"),
|
|
|
206 #endif
|
|
|
207 #if defined (SIGGRANT)
|
|
|
208 ENTRY(SIGGRANT, "SIGGRANT", "Monitor mode granted"),
|
|
|
209 #endif
|
|
|
210 #if defined (SIGRETRACT)
|
|
|
211 ENTRY(SIGRETRACT, "SIGRETRACT", "Need to relinguish monitor mode"),
|
|
|
212 #endif
|
|
|
213 #if defined (SIGMSG)
|
|
|
214 ENTRY(SIGMSG, "SIGMSG", "Monitor mode data available"),
|
|
|
215 #endif
|
|
|
216 #if defined (SIGSOUND)
|
|
|
217 ENTRY(SIGSOUND, "SIGSOUND", "Sound completed"),
|
|
|
218 #endif
|
|
|
219 #if defined (SIGSAK)
|
|
|
220 ENTRY(SIGSAK, "SIGSAK", "Secure attention"),
|
|
|
221 #endif
|
|
|
222 ENTRY(0, NULL, NULL)
|
|
|
223 };
|
|
|
224
|
|
|
225 /* Translation table allocated and initialized at runtime. Indexed by the
|
|
|
226 signal value to find the equivalent symbolic value. */
|
|
|
227
|
|
|
228 static const char **signal_names;
|
|
|
229 static int num_signal_names = 0;
|
|
|
230
|
|
|
231 /* Translation table allocated and initialized at runtime, if it does not
|
|
|
232 already exist in the host environment. Indexed by the signal value to find
|
|
|
233 the descriptive string.
|
|
|
234
|
|
|
235 We don't export it for use in other modules because even though it has the
|
|
|
236 same name, it differs from other implementations in that it is dynamically
|
|
|
237 initialized rather than statically initialized. */
|
|
|
238
|
|
|
239 #ifndef HAVE_SYS_SIGLIST
|
|
|
240
|
|
|
241 static int sys_nsig;
|
|
|
242 static const char **sys_siglist;
|
|
|
243
|
|
|
244 #else
|
|
|
245
|
|
|
246 #ifdef NSIG
|
|
|
247 static int sys_nsig = NSIG;
|
|
|
248 #else
|
|
|
249 #ifdef _NSIG
|
|
|
250 static int sys_nsig = _NSIG;
|
|
|
251 #endif
|
|
|
252 #endif
|
|
|
253 extern const char * const sys_siglist[];
|
|
|
254
|
|
|
255 #endif
|
|
|
256
|
|
|
257
|
|
|
258 /*
|
|
|
259
|
|
|
260 NAME
|
|
|
261
|
|
|
262 init_signal_tables -- initialize the name and message tables
|
|
|
263
|
|
|
264 SYNOPSIS
|
|
|
265
|
|
|
266 static void init_signal_tables ();
|
|
|
267
|
|
|
268 DESCRIPTION
|
|
|
269
|
|
|
270 Using the signal_table, which is initialized at compile time, generate
|
|
|
271 the signal_names and the sys_siglist (if needed) tables, which are
|
|
|
272 indexed at runtime by a specific signal value.
|
|
|
273
|
|
|
274 BUGS
|
|
|
275
|
|
|
276 The initialization of the tables may fail under low memory conditions,
|
|
|
277 in which case we don't do anything particularly useful, but we don't
|
|
|
278 bomb either. Who knows, it might succeed at a later point if we free
|
|
|
279 some memory in the meantime. In any case, the other routines know
|
|
|
280 how to deal with lack of a table after trying to initialize it. This
|
|
|
281 may or may not be considered to be a bug, that we don't specifically
|
|
|
282 warn about this particular failure mode.
|
|
|
283
|
|
|
284 */
|
|
|
285
|
|
|
286 static void
|
|
|
287 init_signal_tables (void)
|
|
|
288 {
|
|
|
289 const struct signal_info *eip;
|
|
|
290 int nbytes;
|
|
|
291
|
|
|
292 /* If we haven't already scanned the signal_table once to find the maximum
|
|
|
293 signal value, then go find it now. */
|
|
|
294
|
|
|
295 if (num_signal_names == 0)
|
|
|
296 {
|
|
|
297 for (eip = signal_table; eip -> name != NULL; eip++)
|
|
|
298 {
|
|
|
299 if (eip -> value >= num_signal_names)
|
|
|
300 {
|
|
|
301 num_signal_names = eip -> value + 1;
|
|
|
302 }
|
|
|
303 }
|
|
|
304 }
|
|
|
305
|
|
|
306 /* Now attempt to allocate the signal_names table, zero it out, and then
|
|
|
307 initialize it from the statically initialized signal_table. */
|
|
|
308
|
|
|
309 if (signal_names == NULL)
|
|
|
310 {
|
|
|
311 nbytes = num_signal_names * sizeof (char *);
|
|
|
312 if ((signal_names = (const char **) malloc (nbytes)) != NULL)
|
|
|
313 {
|
|
|
314 memset (signal_names, 0, nbytes);
|
|
|
315 for (eip = signal_table; eip -> name != NULL; eip++)
|
|
|
316 {
|
|
|
317 signal_names[eip -> value] = eip -> name;
|
|
|
318 }
|
|
|
319 }
|
|
|
320 }
|
|
|
321
|
|
|
322 #ifndef HAVE_SYS_SIGLIST
|
|
|
323
|
|
|
324 /* Now attempt to allocate the sys_siglist table, zero it out, and then
|
|
|
325 initialize it from the statically initialized signal_table. */
|
|
|
326
|
|
|
327 if (sys_siglist == NULL)
|
|
|
328 {
|
|
|
329 nbytes = num_signal_names * sizeof (char *);
|
|
|
330 if ((sys_siglist = (const char **) malloc (nbytes)) != NULL)
|
|
|
331 {
|
|
|
332 memset (sys_siglist, 0, nbytes);
|
|
|
333 sys_nsig = num_signal_names;
|
|
|
334 for (eip = signal_table; eip -> name != NULL; eip++)
|
|
|
335 {
|
|
|
336 sys_siglist[eip -> value] = eip -> msg;
|
|
|
337 }
|
|
|
338 }
|
|
|
339 }
|
|
|
340
|
|
|
341 #endif
|
|
|
342
|
|
|
343 }
|
|
|
344
|
|
|
345
|
|
|
346 /*
|
|
|
347
|
|
|
348 @deftypefn Extension int signo_max (void)
|
|
|
349
|
|
|
350 Returns the maximum signal value for which a corresponding symbolic
|
|
|
351 name or message is available. Note that in the case where we use the
|
|
|
352 @code{sys_siglist} supplied by the system, it is possible for there to
|
|
|
353 be more symbolic names than messages, or vice versa. In fact, the
|
|
|
354 manual page for @code{psignal(3b)} explicitly warns that one should
|
|
|
355 check the size of the table (@code{NSIG}) before indexing it, since
|
|
|
356 new signal codes may be added to the system before they are added to
|
|
|
357 the table. Thus @code{NSIG} might be smaller than value implied by
|
|
|
358 the largest signo value defined in @code{<signal.h>}.
|
|
|
359
|
|
|
360 We return the maximum value that can be used to obtain a meaningful
|
|
|
361 symbolic name or message.
|
|
|
362
|
|
|
363 @end deftypefn
|
|
|
364
|
|
|
365 */
|
|
|
366
|
|
|
367 int
|
|
|
368 signo_max (void)
|
|
|
369 {
|
|
|
370 int maxsize;
|
|
|
371
|
|
|
372 if (signal_names == NULL)
|
|
|
373 {
|
|
|
374 init_signal_tables ();
|
|
|
375 }
|
|
|
376 maxsize = MAX (sys_nsig, num_signal_names);
|
|
|
377 return (maxsize - 1);
|
|
|
378 }
|
|
|
379
|
|
|
380
|
|
|
381 /*
|
|
|
382
|
|
|
383 @deftypefn Supplemental {const char *} strsignal (int @var{signo})
|
|
|
384
|
|
|
385 Maps an signal number to an signal message string, the contents of
|
|
|
386 which are implementation defined. On systems which have the external
|
|
|
387 variable @code{sys_siglist}, these strings will be the same as the
|
|
|
388 ones used by @code{psignal()}.
|
|
|
389
|
|
|
390 If the supplied signal number is within the valid range of indices for
|
|
|
391 the @code{sys_siglist}, but no message is available for the particular
|
|
|
392 signal number, then returns the string @samp{Signal @var{num}}, where
|
|
|
393 @var{num} is the signal number.
|
|
|
394
|
|
|
395 If the supplied signal number is not a valid index into
|
|
|
396 @code{sys_siglist}, returns @code{NULL}.
|
|
|
397
|
|
|
398 The returned string is only guaranteed to be valid only until the next
|
|
|
399 call to @code{strsignal}.
|
|
|
400
|
|
|
401 @end deftypefn
|
|
|
402
|
|
|
403 */
|
|
|
404
|
|
|
405 #ifndef HAVE_STRSIGNAL
|
|
|
406
|
|
|
407 char *
|
|
|
408 strsignal (int signo)
|
|
|
409 {
|
|
|
410 char *msg;
|
|
|
411 static char buf[32];
|
|
|
412
|
|
|
413 #ifndef HAVE_SYS_SIGLIST
|
|
|
414
|
|
|
415 if (signal_names == NULL)
|
|
|
416 {
|
|
|
417 init_signal_tables ();
|
|
|
418 }
|
|
|
419
|
|
|
420 #endif
|
|
|
421
|
|
|
422 if ((signo < 0) || (signo >= sys_nsig))
|
|
|
423 {
|
|
|
424 /* Out of range, just return NULL */
|
|
|
425 msg = NULL;
|
|
|
426 }
|
|
|
427 else if ((sys_siglist == NULL) || (sys_siglist[signo] == NULL))
|
|
|
428 {
|
|
|
429 /* In range, but no sys_siglist or no entry at this index. */
|
|
|
430 sprintf (buf, "Signal %d", signo);
|
|
|
431 msg = buf;
|
|
|
432 }
|
|
|
433 else
|
|
|
434 {
|
|
|
435 /* In range, and a valid message. Just return the message. We
|
|
|
436 can safely cast away const, since POSIX says the user must
|
|
|
437 not modify the result. */
|
|
|
438 msg = (char *) sys_siglist[signo];
|
|
|
439 }
|
|
|
440
|
|
|
441 return (msg);
|
|
|
442 }
|
|
|
443
|
|
|
444 #endif /* ! HAVE_STRSIGNAL */
|
|
|
445
|
|
|
446 /*
|
|
|
447
|
|
|
448 @deftypefn Extension {const char*} strsigno (int @var{signo})
|
|
|
449
|
|
|
450 Given an signal number, returns a pointer to a string containing the
|
|
|
451 symbolic name of that signal number, as found in @code{<signal.h>}.
|
|
|
452
|
|
|
453 If the supplied signal number is within the valid range of indices for
|
|
|
454 symbolic names, but no name is available for the particular signal
|
|
|
455 number, then returns the string @samp{Signal @var{num}}, where
|
|
|
456 @var{num} is the signal number.
|
|
|
457
|
|
|
458 If the supplied signal number is not within the range of valid
|
|
|
459 indices, then returns @code{NULL}.
|
|
|
460
|
|
|
461 The contents of the location pointed to are only guaranteed to be
|
|
|
462 valid until the next call to @code{strsigno}.
|
|
|
463
|
|
|
464 @end deftypefn
|
|
|
465
|
|
|
466 */
|
|
|
467
|
|
|
468 const char *
|
|
|
469 strsigno (int signo)
|
|
|
470 {
|
|
|
471 const char *name;
|
|
|
472 static char buf[32];
|
|
|
473
|
|
|
474 if (signal_names == NULL)
|
|
|
475 {
|
|
|
476 init_signal_tables ();
|
|
|
477 }
|
|
|
478
|
|
|
479 if ((signo < 0) || (signo >= num_signal_names))
|
|
|
480 {
|
|
|
481 /* Out of range, just return NULL */
|
|
|
482 name = NULL;
|
|
|
483 }
|
|
|
484 else if ((signal_names == NULL) || (signal_names[signo] == NULL))
|
|
|
485 {
|
|
|
486 /* In range, but no signal_names or no entry at this index. */
|
|
|
487 sprintf (buf, "Signal %d", signo);
|
|
|
488 name = (const char *) buf;
|
|
|
489 }
|
|
|
490 else
|
|
|
491 {
|
|
|
492 /* In range, and a valid name. Just return the name. */
|
|
|
493 name = signal_names[signo];
|
|
|
494 }
|
|
|
495
|
|
|
496 return (name);
|
|
|
497 }
|
|
|
498
|
|
|
499
|
|
|
500 /*
|
|
|
501
|
|
|
502 @deftypefn Extension int strtosigno (const char *@var{name})
|
|
|
503
|
|
|
504 Given the symbolic name of a signal, map it to a signal number. If no
|
|
|
505 translation is found, returns 0.
|
|
|
506
|
|
|
507 @end deftypefn
|
|
|
508
|
|
|
509 */
|
|
|
510
|
|
|
511 int
|
|
|
512 strtosigno (const char *name)
|
|
|
513 {
|
|
|
514 int signo = 0;
|
|
|
515
|
|
|
516 if (name != NULL)
|
|
|
517 {
|
|
|
518 if (signal_names == NULL)
|
|
|
519 {
|
|
|
520 init_signal_tables ();
|
|
|
521 }
|
|
|
522 for (signo = 0; signo < num_signal_names; signo++)
|
|
|
523 {
|
|
|
524 if ((signal_names[signo] != NULL) &&
|
|
|
525 (strcmp (name, signal_names[signo]) == 0))
|
|
|
526 {
|
|
|
527 break;
|
|
|
528 }
|
|
|
529 }
|
|
|
530 if (signo == num_signal_names)
|
|
|
531 {
|
|
|
532 signo = 0;
|
|
|
533 }
|
|
|
534 }
|
|
|
535 return (signo);
|
|
|
536 }
|
|
|
537
|
|
|
538
|
|
|
539 /*
|
|
|
540
|
|
|
541 @deftypefn Supplemental void psignal (int @var{signo}, char *@var{message})
|
|
|
542
|
|
|
543 Print @var{message} to the standard error, followed by a colon,
|
|
|
544 followed by the description of the signal specified by @var{signo},
|
|
|
545 followed by a newline.
|
|
|
546
|
|
|
547 @end deftypefn
|
|
|
548
|
|
|
549 */
|
|
|
550
|
|
|
551 #ifndef HAVE_PSIGNAL
|
|
|
552
|
|
|
553 void
|
|
|
554 psignal (int signo, char *message)
|
|
|
555 {
|
|
|
556 if (signal_names == NULL)
|
|
|
557 {
|
|
|
558 init_signal_tables ();
|
|
|
559 }
|
|
|
560 if ((signo <= 0) || (signo >= sys_nsig))
|
|
|
561 {
|
|
|
562 fprintf (stderr, "%s: unknown signal\n", message);
|
|
|
563 }
|
|
|
564 else
|
|
|
565 {
|
|
|
566 fprintf (stderr, "%s: %s\n", message, sys_siglist[signo]);
|
|
|
567 }
|
|
|
568 }
|
|
|
569
|
|
|
570 #endif /* ! HAVE_PSIGNAL */
|
|
|
571
|
|
|
572
|
|
|
573 /* A simple little main that does nothing but print all the signal translations
|
|
|
574 if MAIN is defined and this file is compiled and linked. */
|
|
|
575
|
|
|
576 #ifdef MAIN
|
|
|
577
|
|
|
578 #include <stdio.h>
|
|
|
579
|
|
|
580 int
|
|
|
581 main (void)
|
|
|
582 {
|
|
|
583 int signo;
|
|
|
584 int maxsigno;
|
|
|
585 const char *name;
|
|
|
586 const char *msg;
|
|
|
587
|
|
|
588 maxsigno = signo_max ();
|
|
|
589 printf ("%d entries in names table.\n", num_signal_names);
|
|
|
590 printf ("%d entries in messages table.\n", sys_nsig);
|
|
|
591 printf ("%d is max useful index.\n", maxsigno);
|
|
|
592
|
|
|
593 /* Keep printing values until we get to the end of *both* tables, not
|
|
|
594 *either* table. Note that knowing the maximum useful index does *not*
|
|
|
595 relieve us of the responsibility of testing the return pointer for
|
|
|
596 NULL. */
|
|
|
597
|
|
|
598 for (signo = 0; signo <= maxsigno; signo++)
|
|
|
599 {
|
|
|
600 name = strsigno (signo);
|
|
|
601 name = (name == NULL) ? "<NULL>" : name;
|
|
|
602 msg = strsignal (signo);
|
|
|
603 msg = (msg == NULL) ? "<NULL>" : msg;
|
|
|
604 printf ("%-4d%-18s%s\n", signo, name, msg);
|
|
|
605 }
|
|
|
606
|
|
|
607 return 0;
|
|
|
608 }
|
|
|
609
|
|
|
610 #endif
|
