Mercurial > hg > CbC > CbC_gcc
annotate libiberty/make-temp-file.c @ 158:494b0b89df80 default tip
...
| author | Shinji KONO <kono@ie.u-ryukyu.ac.jp> |
|---|---|
| date | Mon, 25 May 2020 18:13:55 +0900 |
| parents | 1830386684a0 |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* Utility to pick a temporary filename prefix. |
| 145 | 2 Copyright (C) 1996-2020 Free Software Foundation, Inc. |
| 0 | 3 |
| 4 This file is part of the libiberty library. | |
| 5 Libiberty is free software; you can redistribute it and/or | |
| 6 modify it under the terms of the GNU Library General Public | |
| 7 License as published by the Free Software Foundation; either | |
| 8 version 2 of the License, or (at your option) any later version. | |
| 9 | |
| 10 Libiberty is distributed in the hope that it will be useful, | |
| 11 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 13 Library General Public License for more details. | |
| 14 | |
| 15 You should have received a copy of the GNU Library General Public | |
| 16 License along with libiberty; see the file COPYING.LIB. If not, | |
| 17 write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor, | |
| 18 Boston, MA 02110-1301, USA. */ | |
| 19 | |
| 20 #ifdef HAVE_CONFIG_H | |
| 21 #include "config.h" | |
| 22 #endif | |
| 23 | |
| 24 #include <stdio.h> /* May get P_tmpdir. */ | |
| 25 #include <sys/types.h> | |
| 26 #include <errno.h> | |
| 27 #ifdef HAVE_UNISTD_H | |
| 28 #include <unistd.h> | |
| 29 #endif | |
| 30 #ifdef HAVE_STDLIB_H | |
| 31 #include <stdlib.h> | |
| 32 #endif | |
| 33 #ifdef HAVE_STRING_H | |
| 34 #include <string.h> | |
| 35 #endif | |
| 36 #ifdef HAVE_SYS_FILE_H | |
| 37 #include <sys/file.h> /* May get R_OK, etc. on some systems. */ | |
| 38 #endif | |
| 39 #if defined(_WIN32) && !defined(__CYGWIN__) | |
| 40 #include <windows.h> | |
| 41 #endif | |
| 42 | |
| 43 #ifndef R_OK | |
| 44 #define R_OK 4 | |
| 45 #define W_OK 2 | |
| 46 #define X_OK 1 | |
| 47 #endif | |
| 48 | |
| 49 #include "libiberty.h" | |
| 50 extern int mkstemps (char *, int); | |
| 51 | |
| 52 /* '/' works just fine on MS-DOS based systems. */ | |
| 53 #ifndef DIR_SEPARATOR | |
| 54 #define DIR_SEPARATOR '/' | |
| 55 #endif | |
| 56 | |
| 57 /* Name of temporary file. | |
| 58 mktemp requires 6 trailing X's. */ | |
| 131 | 59 #define TEMP_FILE "XXXXXX" |
| 0 | 60 #define TEMP_FILE_LEN (sizeof(TEMP_FILE) - 1) |
| 61 | |
| 62 #if !defined(_WIN32) || defined(__CYGWIN__) | |
| 63 | |
| 64 /* Subroutine of choose_tmpdir. | |
| 65 If BASE is non-NULL, return it. | |
| 66 Otherwise it checks if DIR is a usable directory. | |
| 67 If success, DIR is returned. | |
| 68 Otherwise NULL is returned. */ | |
| 69 | |
| 70 static inline const char *try_dir (const char *, const char *); | |
| 71 | |
| 72 static inline const char * | |
| 73 try_dir (const char *dir, const char *base) | |
| 74 { | |
| 75 if (base != 0) | |
| 76 return base; | |
| 77 if (dir != 0 | |
| 78 && access (dir, R_OK | W_OK | X_OK) == 0) | |
| 79 return dir; | |
| 80 return 0; | |
| 81 } | |
| 82 | |
| 83 static const char tmp[] = { DIR_SEPARATOR, 't', 'm', 'p', 0 }; | |
| 84 static const char usrtmp[] = | |
| 85 { DIR_SEPARATOR, 'u', 's', 'r', DIR_SEPARATOR, 't', 'm', 'p', 0 }; | |
| 86 static const char vartmp[] = | |
| 87 { DIR_SEPARATOR, 'v', 'a', 'r', DIR_SEPARATOR, 't', 'm', 'p', 0 }; | |
| 88 | |
| 89 #endif | |
| 90 | |
| 91 static char *memoized_tmpdir; | |
| 92 | |
| 93 /* | |
| 94 | |
| 111 | 95 @deftypefn Replacement const char* choose_tmpdir () |
| 0 | 96 |
| 97 Returns a pointer to a directory path suitable for creating temporary | |
| 98 files in. | |
| 99 | |
| 100 @end deftypefn | |
| 101 | |
| 102 */ | |
| 103 | |
| 111 | 104 const char * |
| 0 | 105 choose_tmpdir (void) |
| 106 { | |
| 107 if (!memoized_tmpdir) | |
| 108 { | |
| 109 #if !defined(_WIN32) || defined(__CYGWIN__) | |
| 110 const char *base = 0; | |
| 111 char *tmpdir; | |
| 112 unsigned int len; | |
| 113 | |
|
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
114 #ifdef VMS |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
115 /* Try VMS standard temp logical. */ |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
116 base = try_dir ("/sys$scratch", base); |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
117 #else |
| 0 | 118 base = try_dir (getenv ("TMPDIR"), base); |
| 119 base = try_dir (getenv ("TMP"), base); | |
| 120 base = try_dir (getenv ("TEMP"), base); | |
|
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
121 #endif |
| 0 | 122 |
| 123 #ifdef P_tmpdir | |
|
67
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
55
diff
changeset
|
124 /* We really want a directory name here as if concatenated with say \dir |
|
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
55
diff
changeset
|
125 we do not end up with a double \\ which defines an UNC path. */ |
|
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
55
diff
changeset
|
126 if (strcmp (P_tmpdir, "\\") == 0) |
|
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
55
diff
changeset
|
127 base = try_dir ("\\.", base); |
|
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
55
diff
changeset
|
128 else |
|
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
55
diff
changeset
|
129 base = try_dir (P_tmpdir, base); |
| 0 | 130 #endif |
| 131 | |
| 132 /* Try /var/tmp, /usr/tmp, then /tmp. */ | |
| 133 base = try_dir (vartmp, base); | |
| 134 base = try_dir (usrtmp, base); | |
| 135 base = try_dir (tmp, base); | |
| 136 | |
| 137 /* If all else fails, use the current directory! */ | |
| 138 if (base == 0) | |
| 139 base = "."; | |
| 140 /* Append DIR_SEPARATOR to the directory we've chosen | |
| 141 and return it. */ | |
| 142 len = strlen (base); | |
| 143 tmpdir = XNEWVEC (char, len + 2); | |
| 144 strcpy (tmpdir, base); | |
| 145 tmpdir[len] = DIR_SEPARATOR; | |
| 146 tmpdir[len+1] = '\0'; | |
| 147 memoized_tmpdir = tmpdir; | |
| 148 #else /* defined(_WIN32) && !defined(__CYGWIN__) */ | |
| 149 DWORD len; | |
| 150 | |
| 151 /* Figure out how much space we need. */ | |
| 152 len = GetTempPath(0, NULL); | |
| 153 if (len) | |
| 154 { | |
| 155 memoized_tmpdir = XNEWVEC (char, len); | |
| 156 if (!GetTempPath(len, memoized_tmpdir)) | |
| 157 { | |
| 158 XDELETEVEC (memoized_tmpdir); | |
| 159 memoized_tmpdir = NULL; | |
| 160 } | |
| 161 } | |
| 162 if (!memoized_tmpdir) | |
| 163 /* If all else fails, use the current directory. */ | |
| 164 memoized_tmpdir = xstrdup (".\\"); | |
| 165 #endif /* defined(_WIN32) && !defined(__CYGWIN__) */ | |
| 166 } | |
| 167 | |
| 168 return memoized_tmpdir; | |
| 169 } | |
| 170 | |
| 171 /* | |
| 172 | |
| 173 @deftypefn Replacement char* make_temp_file (const char *@var{suffix}) | |
| 174 | |
| 175 Return a temporary file name (as a string) or @code{NULL} if unable to | |
| 176 create one. @var{suffix} is a suffix to append to the file name. The | |
| 177 string is @code{malloc}ed, and the temporary file has been created. | |
| 178 | |
| 179 @end deftypefn | |
| 180 | |
| 181 */ | |
| 182 | |
| 183 char * | |
| 131 | 184 make_temp_file_with_prefix (const char *prefix, const char *suffix) |
| 0 | 185 { |
| 186 const char *base = choose_tmpdir (); | |
| 187 char *temp_filename; | |
| 131 | 188 int base_len, suffix_len, prefix_len; |
| 0 | 189 int fd; |
| 190 | |
| 131 | 191 if (prefix == 0) |
| 192 prefix = "cc"; | |
| 193 | |
| 0 | 194 if (suffix == 0) |
| 195 suffix = ""; | |
| 196 | |
| 197 base_len = strlen (base); | |
| 131 | 198 prefix_len = strlen (prefix); |
| 0 | 199 suffix_len = strlen (suffix); |
| 200 | |
| 201 temp_filename = XNEWVEC (char, base_len | |
| 202 + TEMP_FILE_LEN | |
| 131 | 203 + suffix_len |
| 204 + prefix_len + 1); | |
| 0 | 205 strcpy (temp_filename, base); |
| 131 | 206 strcpy (temp_filename + base_len, prefix); |
| 207 strcpy (temp_filename + base_len + prefix_len, TEMP_FILE); | |
| 208 strcpy (temp_filename + base_len + prefix_len + TEMP_FILE_LEN, suffix); | |
| 0 | 209 |
| 210 fd = mkstemps (temp_filename, suffix_len); | |
| 211 /* Mkstemps failed. It may be EPERM, ENOSPC etc. */ | |
| 212 if (fd == -1) | |
| 213 { | |
| 214 fprintf (stderr, "Cannot create temporary file in %s: %s\n", | |
| 215 base, strerror (errno)); | |
| 216 abort (); | |
| 217 } | |
| 218 /* We abort on failed close out of sheer paranoia. */ | |
| 219 if (close (fd)) | |
| 220 abort (); | |
| 221 return temp_filename; | |
| 222 } | |
| 131 | 223 |
| 224 char * | |
| 225 make_temp_file (const char *suffix) | |
| 226 { | |
| 227 return make_temp_file_with_prefix (NULL, suffix); | |
| 228 } |