Linus Torvalds | 112db55 | 2008-06-22 12:19:25 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Various trivial helper wrappers around standard functions |
| 3 | */ |
| 4 | #include "cache.h" |
| 5 | |
Jonathan Nieder | e050029 | 2010-11-06 14:00:38 -0500 | [diff] [blame] | 6 | static void do_nothing(size_t size) |
Nicolas Pitre | a9a7463 | 2010-03-24 16:22:34 -0400 | [diff] [blame] | 7 | { |
Nicolas Pitre | a9a7463 | 2010-03-24 16:22:34 -0400 | [diff] [blame] | 8 | } |
| 9 | |
Jonathan Nieder | e050029 | 2010-11-06 14:00:38 -0500 | [diff] [blame] | 10 | static void (*try_to_free_routine)(size_t size) = do_nothing; |
Nicolas Pitre | a9a7463 | 2010-03-24 16:22:34 -0400 | [diff] [blame] | 11 | |
Nguyễn Thái Ngọc Duy | d41489a | 2012-03-07 17:54:16 +0700 | [diff] [blame] | 12 | static void memory_limit_check(size_t size) |
| 13 | { |
| 14 | static int limit = -1; |
| 15 | if (limit == -1) { |
| 16 | const char *env = getenv("GIT_ALLOC_LIMIT"); |
| 17 | limit = env ? atoi(env) * 1024 : 0; |
| 18 | } |
| 19 | if (limit && size > limit) |
| 20 | die("attempting to allocate %"PRIuMAX" over limit %d", |
| 21 | (intmax_t)size, limit); |
| 22 | } |
| 23 | |
Johannes Sixt | 851c34b | 2010-05-08 17:13:49 +0200 | [diff] [blame] | 24 | try_to_free_t set_try_to_free_routine(try_to_free_t routine) |
Nicolas Pitre | a9a7463 | 2010-03-24 16:22:34 -0400 | [diff] [blame] | 25 | { |
Johannes Sixt | 851c34b | 2010-05-08 17:13:49 +0200 | [diff] [blame] | 26 | try_to_free_t old = try_to_free_routine; |
Junio C Hamano | 00b0d7f | 2010-12-21 09:24:18 -0800 | [diff] [blame] | 27 | if (!routine) |
| 28 | routine = do_nothing; |
Johannes Sixt | 851c34b | 2010-05-08 17:13:49 +0200 | [diff] [blame] | 29 | try_to_free_routine = routine; |
| 30 | return old; |
Nicolas Pitre | a9a7463 | 2010-03-24 16:22:34 -0400 | [diff] [blame] | 31 | } |
| 32 | |
Linus Torvalds | 112db55 | 2008-06-22 12:19:25 -0700 | [diff] [blame] | 33 | char *xstrdup(const char *str) |
| 34 | { |
| 35 | char *ret = strdup(str); |
| 36 | if (!ret) { |
Nicolas Pitre | a9a7463 | 2010-03-24 16:22:34 -0400 | [diff] [blame] | 37 | try_to_free_routine(strlen(str) + 1); |
Linus Torvalds | 112db55 | 2008-06-22 12:19:25 -0700 | [diff] [blame] | 38 | ret = strdup(str); |
| 39 | if (!ret) |
| 40 | die("Out of memory, strdup failed"); |
| 41 | } |
| 42 | return ret; |
| 43 | } |
| 44 | |
| 45 | void *xmalloc(size_t size) |
| 46 | { |
Nguyễn Thái Ngọc Duy | d41489a | 2012-03-07 17:54:16 +0700 | [diff] [blame] | 47 | void *ret; |
| 48 | |
| 49 | memory_limit_check(size); |
| 50 | ret = malloc(size); |
Linus Torvalds | 112db55 | 2008-06-22 12:19:25 -0700 | [diff] [blame] | 51 | if (!ret && !size) |
| 52 | ret = malloc(1); |
| 53 | if (!ret) { |
Nicolas Pitre | a9a7463 | 2010-03-24 16:22:34 -0400 | [diff] [blame] | 54 | try_to_free_routine(size); |
Linus Torvalds | 112db55 | 2008-06-22 12:19:25 -0700 | [diff] [blame] | 55 | ret = malloc(size); |
| 56 | if (!ret && !size) |
| 57 | ret = malloc(1); |
| 58 | if (!ret) |
Matthieu Moy | 8bd9fd5 | 2010-08-20 17:09:51 +0200 | [diff] [blame] | 59 | die("Out of memory, malloc failed (tried to allocate %lu bytes)", |
| 60 | (unsigned long)size); |
Linus Torvalds | 112db55 | 2008-06-22 12:19:25 -0700 | [diff] [blame] | 61 | } |
| 62 | #ifdef XMALLOC_POISON |
| 63 | memset(ret, 0xA5, size); |
| 64 | #endif |
| 65 | return ret; |
| 66 | } |
| 67 | |
Ilari Liusvaara | 5bf9219 | 2010-01-26 20:24:12 +0200 | [diff] [blame] | 68 | void *xmallocz(size_t size) |
| 69 | { |
| 70 | void *ret; |
Jonathan Nieder | 1368f65 | 2010-10-10 21:59:26 -0500 | [diff] [blame] | 71 | if (unsigned_add_overflows(size, 1)) |
Ilari Liusvaara | 5bf9219 | 2010-01-26 20:24:12 +0200 | [diff] [blame] | 72 | die("Data too large to fit into virtual memory space."); |
| 73 | ret = xmalloc(size + 1); |
| 74 | ((char*)ret)[size] = 0; |
| 75 | return ret; |
| 76 | } |
| 77 | |
Linus Torvalds | 112db55 | 2008-06-22 12:19:25 -0700 | [diff] [blame] | 78 | /* |
| 79 | * xmemdupz() allocates (len + 1) bytes of memory, duplicates "len" bytes of |
| 80 | * "data" to the allocated memory, zero terminates the allocated memory, |
| 81 | * and returns a pointer to the allocated memory. If the allocation fails, |
| 82 | * the program dies. |
| 83 | */ |
| 84 | void *xmemdupz(const void *data, size_t len) |
| 85 | { |
Ilari Liusvaara | 5bf9219 | 2010-01-26 20:24:12 +0200 | [diff] [blame] | 86 | return memcpy(xmallocz(len), data, len); |
Linus Torvalds | 112db55 | 2008-06-22 12:19:25 -0700 | [diff] [blame] | 87 | } |
| 88 | |
| 89 | char *xstrndup(const char *str, size_t len) |
| 90 | { |
| 91 | char *p = memchr(str, '\0', len); |
| 92 | return xmemdupz(str, p ? p - str : len); |
| 93 | } |
| 94 | |
| 95 | void *xrealloc(void *ptr, size_t size) |
| 96 | { |
Nguyễn Thái Ngọc Duy | d41489a | 2012-03-07 17:54:16 +0700 | [diff] [blame] | 97 | void *ret; |
| 98 | |
| 99 | memory_limit_check(size); |
| 100 | ret = realloc(ptr, size); |
Linus Torvalds | 112db55 | 2008-06-22 12:19:25 -0700 | [diff] [blame] | 101 | if (!ret && !size) |
| 102 | ret = realloc(ptr, 1); |
| 103 | if (!ret) { |
Nicolas Pitre | a9a7463 | 2010-03-24 16:22:34 -0400 | [diff] [blame] | 104 | try_to_free_routine(size); |
Linus Torvalds | 112db55 | 2008-06-22 12:19:25 -0700 | [diff] [blame] | 105 | ret = realloc(ptr, size); |
| 106 | if (!ret && !size) |
| 107 | ret = realloc(ptr, 1); |
| 108 | if (!ret) |
| 109 | die("Out of memory, realloc failed"); |
| 110 | } |
| 111 | return ret; |
| 112 | } |
| 113 | |
| 114 | void *xcalloc(size_t nmemb, size_t size) |
| 115 | { |
Nguyễn Thái Ngọc Duy | d41489a | 2012-03-07 17:54:16 +0700 | [diff] [blame] | 116 | void *ret; |
| 117 | |
| 118 | memory_limit_check(size * nmemb); |
| 119 | ret = calloc(nmemb, size); |
Linus Torvalds | 112db55 | 2008-06-22 12:19:25 -0700 | [diff] [blame] | 120 | if (!ret && (!nmemb || !size)) |
| 121 | ret = calloc(1, 1); |
| 122 | if (!ret) { |
Nicolas Pitre | a9a7463 | 2010-03-24 16:22:34 -0400 | [diff] [blame] | 123 | try_to_free_routine(nmemb * size); |
Linus Torvalds | 112db55 | 2008-06-22 12:19:25 -0700 | [diff] [blame] | 124 | ret = calloc(nmemb, size); |
| 125 | if (!ret && (!nmemb || !size)) |
| 126 | ret = calloc(1, 1); |
| 127 | if (!ret) |
| 128 | die("Out of memory, calloc failed"); |
| 129 | } |
| 130 | return ret; |
| 131 | } |
| 132 | |
Linus Torvalds | 112db55 | 2008-06-22 12:19:25 -0700 | [diff] [blame] | 133 | /* |
| 134 | * xread() is the same a read(), but it automatically restarts read() |
| 135 | * operations with a recoverable error (EAGAIN and EINTR). xread() |
| 136 | * DOES NOT GUARANTEE that "len" bytes is read even if the data is available. |
| 137 | */ |
| 138 | ssize_t xread(int fd, void *buf, size_t len) |
| 139 | { |
| 140 | ssize_t nr; |
| 141 | while (1) { |
| 142 | nr = read(fd, buf, len); |
| 143 | if ((nr < 0) && (errno == EAGAIN || errno == EINTR)) |
| 144 | continue; |
| 145 | return nr; |
| 146 | } |
| 147 | } |
| 148 | |
| 149 | /* |
| 150 | * xwrite() is the same a write(), but it automatically restarts write() |
| 151 | * operations with a recoverable error (EAGAIN and EINTR). xwrite() DOES NOT |
| 152 | * GUARANTEE that "len" bytes is written even if the operation is successful. |
| 153 | */ |
| 154 | ssize_t xwrite(int fd, const void *buf, size_t len) |
| 155 | { |
| 156 | ssize_t nr; |
| 157 | while (1) { |
| 158 | nr = write(fd, buf, len); |
| 159 | if ((nr < 0) && (errno == EAGAIN || errno == EINTR)) |
| 160 | continue; |
| 161 | return nr; |
| 162 | } |
| 163 | } |
| 164 | |
Junio C Hamano | 559e840 | 2008-07-20 16:13:05 -0700 | [diff] [blame] | 165 | ssize_t read_in_full(int fd, void *buf, size_t count) |
| 166 | { |
| 167 | char *p = buf; |
| 168 | ssize_t total = 0; |
| 169 | |
| 170 | while (count > 0) { |
| 171 | ssize_t loaded = xread(fd, p, count); |
Jeff King | 56d7c27 | 2011-05-26 12:30:27 -0400 | [diff] [blame] | 172 | if (loaded < 0) |
| 173 | return -1; |
| 174 | if (loaded == 0) |
| 175 | return total; |
Junio C Hamano | 559e840 | 2008-07-20 16:13:05 -0700 | [diff] [blame] | 176 | count -= loaded; |
| 177 | p += loaded; |
| 178 | total += loaded; |
| 179 | } |
| 180 | |
| 181 | return total; |
| 182 | } |
| 183 | |
| 184 | ssize_t write_in_full(int fd, const void *buf, size_t count) |
| 185 | { |
| 186 | const char *p = buf; |
| 187 | ssize_t total = 0; |
| 188 | |
| 189 | while (count > 0) { |
| 190 | ssize_t written = xwrite(fd, p, count); |
| 191 | if (written < 0) |
| 192 | return -1; |
| 193 | if (!written) { |
| 194 | errno = ENOSPC; |
| 195 | return -1; |
| 196 | } |
| 197 | count -= written; |
| 198 | p += written; |
| 199 | total += written; |
| 200 | } |
| 201 | |
| 202 | return total; |
| 203 | } |
| 204 | |
Linus Torvalds | 112db55 | 2008-06-22 12:19:25 -0700 | [diff] [blame] | 205 | int xdup(int fd) |
| 206 | { |
| 207 | int ret = dup(fd); |
| 208 | if (ret < 0) |
Thomas Rast | d824cbb | 2009-06-27 17:58:46 +0200 | [diff] [blame] | 209 | die_errno("dup failed"); |
Linus Torvalds | 112db55 | 2008-06-22 12:19:25 -0700 | [diff] [blame] | 210 | return ret; |
| 211 | } |
| 212 | |
| 213 | FILE *xfdopen(int fd, const char *mode) |
| 214 | { |
| 215 | FILE *stream = fdopen(fd, mode); |
| 216 | if (stream == NULL) |
Thomas Rast | d824cbb | 2009-06-27 17:58:46 +0200 | [diff] [blame] | 217 | die_errno("Out of memory? fdopen failed"); |
Linus Torvalds | 112db55 | 2008-06-22 12:19:25 -0700 | [diff] [blame] | 218 | return stream; |
| 219 | } |
| 220 | |
| 221 | int xmkstemp(char *template) |
| 222 | { |
| 223 | int fd; |
Arnout Engelen | 6cf6bb3 | 2010-12-18 22:28:00 +0100 | [diff] [blame] | 224 | char origtemplate[PATH_MAX]; |
| 225 | strlcpy(origtemplate, template, sizeof(origtemplate)); |
Linus Torvalds | 112db55 | 2008-06-22 12:19:25 -0700 | [diff] [blame] | 226 | |
| 227 | fd = mkstemp(template); |
Arnout Engelen | 6cf6bb3 | 2010-12-18 22:28:00 +0100 | [diff] [blame] | 228 | if (fd < 0) { |
| 229 | int saved_errno = errno; |
| 230 | const char *nonrelative_template; |
| 231 | |
Junio C Hamano | f7be59b | 2012-12-18 12:51:35 -0800 | [diff] [blame] | 232 | if (strlen(template) != strlen(origtemplate)) |
Arnout Engelen | 6cf6bb3 | 2010-12-18 22:28:00 +0100 | [diff] [blame] | 233 | template = origtemplate; |
| 234 | |
Carlos Martín Nieto | e2a57aa | 2011-03-17 12:26:46 +0100 | [diff] [blame] | 235 | nonrelative_template = absolute_path(template); |
Arnout Engelen | 6cf6bb3 | 2010-12-18 22:28:00 +0100 | [diff] [blame] | 236 | errno = saved_errno; |
| 237 | die_errno("Unable to create temporary file '%s'", |
| 238 | nonrelative_template); |
| 239 | } |
Linus Torvalds | 112db55 | 2008-06-22 12:19:25 -0700 | [diff] [blame] | 240 | return fd; |
| 241 | } |
Linus Torvalds | 39c6854 | 2009-01-07 19:54:47 -0800 | [diff] [blame] | 242 | |
Jonathan Nieder | 33f2393 | 2010-11-06 06:46:31 -0500 | [diff] [blame] | 243 | /* git_mkstemp() - create tmp file honoring TMPDIR variable */ |
| 244 | int git_mkstemp(char *path, size_t len, const char *template) |
| 245 | { |
| 246 | const char *tmp; |
| 247 | size_t n; |
| 248 | |
| 249 | tmp = getenv("TMPDIR"); |
| 250 | if (!tmp) |
| 251 | tmp = "/tmp"; |
| 252 | n = snprintf(path, len, "%s/%s", tmp, template); |
| 253 | if (len <= n) { |
| 254 | errno = ENAMETOOLONG; |
| 255 | return -1; |
| 256 | } |
| 257 | return mkstemp(path); |
| 258 | } |
| 259 | |
| 260 | /* git_mkstemps() - create tmp file with suffix honoring TMPDIR variable. */ |
| 261 | int git_mkstemps(char *path, size_t len, const char *template, int suffix_len) |
| 262 | { |
| 263 | const char *tmp; |
| 264 | size_t n; |
| 265 | |
| 266 | tmp = getenv("TMPDIR"); |
| 267 | if (!tmp) |
| 268 | tmp = "/tmp"; |
| 269 | n = snprintf(path, len, "%s/%s", tmp, template); |
| 270 | if (len <= n) { |
| 271 | errno = ENAMETOOLONG; |
| 272 | return -1; |
| 273 | } |
| 274 | return mkstemps(path, suffix_len); |
| 275 | } |
| 276 | |
| 277 | /* Adapted from libiberty's mkstemp.c. */ |
| 278 | |
| 279 | #undef TMP_MAX |
| 280 | #define TMP_MAX 16384 |
| 281 | |
| 282 | int git_mkstemps_mode(char *pattern, int suffix_len, int mode) |
| 283 | { |
| 284 | static const char letters[] = |
| 285 | "abcdefghijklmnopqrstuvwxyz" |
| 286 | "ABCDEFGHIJKLMNOPQRSTUVWXYZ" |
| 287 | "0123456789"; |
| 288 | static const int num_letters = 62; |
| 289 | uint64_t value; |
| 290 | struct timeval tv; |
| 291 | char *template; |
| 292 | size_t len; |
| 293 | int fd, count; |
| 294 | |
| 295 | len = strlen(pattern); |
| 296 | |
| 297 | if (len < 6 + suffix_len) { |
| 298 | errno = EINVAL; |
| 299 | return -1; |
| 300 | } |
| 301 | |
| 302 | if (strncmp(&pattern[len - 6 - suffix_len], "XXXXXX", 6)) { |
| 303 | errno = EINVAL; |
| 304 | return -1; |
| 305 | } |
| 306 | |
| 307 | /* |
| 308 | * Replace pattern's XXXXXX characters with randomness. |
| 309 | * Try TMP_MAX different filenames. |
| 310 | */ |
| 311 | gettimeofday(&tv, NULL); |
| 312 | value = ((size_t)(tv.tv_usec << 16)) ^ tv.tv_sec ^ getpid(); |
| 313 | template = &pattern[len - 6 - suffix_len]; |
| 314 | for (count = 0; count < TMP_MAX; ++count) { |
| 315 | uint64_t v = value; |
| 316 | /* Fill in the random bits. */ |
| 317 | template[0] = letters[v % num_letters]; v /= num_letters; |
| 318 | template[1] = letters[v % num_letters]; v /= num_letters; |
| 319 | template[2] = letters[v % num_letters]; v /= num_letters; |
| 320 | template[3] = letters[v % num_letters]; v /= num_letters; |
| 321 | template[4] = letters[v % num_letters]; v /= num_letters; |
| 322 | template[5] = letters[v % num_letters]; v /= num_letters; |
| 323 | |
| 324 | fd = open(pattern, O_CREAT | O_EXCL | O_RDWR, mode); |
| 325 | if (fd > 0) |
| 326 | return fd; |
| 327 | /* |
| 328 | * Fatal error (EPERM, ENOSPC etc). |
| 329 | * It doesn't make sense to loop. |
| 330 | */ |
| 331 | if (errno != EEXIST) |
| 332 | break; |
| 333 | /* |
| 334 | * This is a random value. It is only necessary that |
| 335 | * the next TMP_MAX values generated by adding 7777 to |
| 336 | * VALUE are different with (module 2^32). |
| 337 | */ |
| 338 | value += 7777; |
| 339 | } |
| 340 | /* We return the null string if we can't find a unique file name. */ |
| 341 | pattern[0] = '\0'; |
| 342 | return -1; |
| 343 | } |
| 344 | |
| 345 | int git_mkstemp_mode(char *pattern, int mode) |
| 346 | { |
| 347 | /* mkstemp is just mkstemps with no suffix */ |
| 348 | return git_mkstemps_mode(pattern, 0, mode); |
| 349 | } |
| 350 | |
| 351 | int gitmkstemps(char *pattern, int suffix_len) |
| 352 | { |
| 353 | return git_mkstemps_mode(pattern, suffix_len, 0600); |
| 354 | } |
| 355 | |
Matthieu Moy | b862b61 | 2010-02-22 23:32:13 +0100 | [diff] [blame] | 356 | int xmkstemp_mode(char *template, int mode) |
| 357 | { |
| 358 | int fd; |
Arnout Engelen | 6cf6bb3 | 2010-12-18 22:28:00 +0100 | [diff] [blame] | 359 | char origtemplate[PATH_MAX]; |
| 360 | strlcpy(origtemplate, template, sizeof(origtemplate)); |
Matthieu Moy | b862b61 | 2010-02-22 23:32:13 +0100 | [diff] [blame] | 361 | |
| 362 | fd = git_mkstemp_mode(template, mode); |
Arnout Engelen | 6cf6bb3 | 2010-12-18 22:28:00 +0100 | [diff] [blame] | 363 | if (fd < 0) { |
| 364 | int saved_errno = errno; |
| 365 | const char *nonrelative_template; |
| 366 | |
| 367 | if (!template[0]) |
| 368 | template = origtemplate; |
| 369 | |
Carlos Martín Nieto | e2a57aa | 2011-03-17 12:26:46 +0100 | [diff] [blame] | 370 | nonrelative_template = absolute_path(template); |
Arnout Engelen | 6cf6bb3 | 2010-12-18 22:28:00 +0100 | [diff] [blame] | 371 | errno = saved_errno; |
| 372 | die_errno("Unable to create temporary file '%s'", |
| 373 | nonrelative_template); |
| 374 | } |
Matthieu Moy | b862b61 | 2010-02-22 23:32:13 +0100 | [diff] [blame] | 375 | return fd; |
| 376 | } |
| 377 | |
Peter Collingbourne | 10e13ec | 2010-03-26 15:25:32 +0000 | [diff] [blame] | 378 | static int warn_if_unremovable(const char *op, const char *file, int rc) |
Alex Riesen | fc71db3 | 2009-04-29 23:21:46 +0200 | [diff] [blame] | 379 | { |
Alex Riesen | fc71db3 | 2009-04-29 23:21:46 +0200 | [diff] [blame] | 380 | if (rc < 0) { |
| 381 | int err = errno; |
| 382 | if (ENOENT != err) { |
Peter Collingbourne | 10e13ec | 2010-03-26 15:25:32 +0000 | [diff] [blame] | 383 | warning("unable to %s %s: %s", |
| 384 | op, file, strerror(errno)); |
Alex Riesen | fc71db3 | 2009-04-29 23:21:46 +0200 | [diff] [blame] | 385 | errno = err; |
| 386 | } |
| 387 | } |
| 388 | return rc; |
| 389 | } |
| 390 | |
Peter Collingbourne | 10e13ec | 2010-03-26 15:25:32 +0000 | [diff] [blame] | 391 | int unlink_or_warn(const char *file) |
| 392 | { |
| 393 | return warn_if_unremovable("unlink", file, unlink(file)); |
| 394 | } |
Peter Collingbourne | d172329 | 2010-03-26 15:25:33 +0000 | [diff] [blame] | 395 | |
| 396 | int rmdir_or_warn(const char *file) |
| 397 | { |
| 398 | return warn_if_unremovable("rmdir", file, rmdir(file)); |
| 399 | } |
Peter Collingbourne | 80d706a | 2010-03-26 15:25:34 +0000 | [diff] [blame] | 400 | |
| 401 | int remove_or_warn(unsigned int mode, const char *file) |
| 402 | { |
| 403 | return S_ISGITLINK(mode) ? rmdir_or_warn(file) : unlink_or_warn(file); |
| 404 | } |
Jeff King | 2f70587 | 2012-05-21 19:10:20 -0400 | [diff] [blame] | 405 | |
Junio C Hamano | 55b38a4 | 2012-08-21 14:52:07 -0700 | [diff] [blame] | 406 | void warn_on_inaccessible(const char *path) |
| 407 | { |
| 408 | warning(_("unable to access '%s': %s"), path, strerror(errno)); |
| 409 | } |
| 410 | |
Jeff King | ba8bd83 | 2012-08-21 02:10:59 -0400 | [diff] [blame] | 411 | int access_or_warn(const char *path, int mode) |
| 412 | { |
| 413 | int ret = access(path, mode); |
Jonathan Nieder | e5c52c9 | 2012-10-13 17:03:07 -0700 | [diff] [blame] | 414 | if (ret && errno != ENOENT && errno != ENOTDIR) |
Junio C Hamano | 55b38a4 | 2012-08-21 14:52:07 -0700 | [diff] [blame] | 415 | warn_on_inaccessible(path); |
Jeff King | ba8bd83 | 2012-08-21 02:10:59 -0400 | [diff] [blame] | 416 | return ret; |
| 417 | } |
| 418 | |
Jonathan Nieder | 96b9e0e | 2012-10-13 17:04:02 -0700 | [diff] [blame] | 419 | int access_or_die(const char *path, int mode) |
| 420 | { |
| 421 | int ret = access(path, mode); |
| 422 | if (ret && errno != ENOENT && errno != ENOTDIR) |
| 423 | die_errno(_("unable to access '%s'"), path); |
| 424 | return ret; |
| 425 | } |
| 426 | |
Jeff King | 2f70587 | 2012-05-21 19:10:20 -0400 | [diff] [blame] | 427 | struct passwd *xgetpwuid_self(void) |
| 428 | { |
| 429 | struct passwd *pw; |
| 430 | |
| 431 | errno = 0; |
| 432 | pw = getpwuid(getuid()); |
| 433 | if (!pw) |
| 434 | die(_("unable to look up current user in the passwd file: %s"), |
| 435 | errno ? strerror(errno) : _("no such user")); |
| 436 | return pw; |
| 437 | } |