util.c

   1 /*-*- Mode: C; c-basic-offset: 8 -*-*/
   2
   3 /***
   4   This file is part of systemd.
   5
   6   Copyright 2010 Lennart Poettering
   7
   8   systemd is free software; you can redistribute it and/or modify it
   9   under the terms of the GNU General Public License as published by
  10   the Free Software Foundation; either version 2 of the License, or
  11   (at your option) any later version.
  12
  13   systemd is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   General Public License for more details.
  17
  18   You should have received a copy of the GNU General Public License
  19   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  20 ***/
  21
  22 #include <assert.h>
  23 #include <string.h>
  24 #include <unistd.h>
  25 #include <errno.h>
  26 #include <stdlib.h>
  27 #include <signal.h>
  28 #include <stdio.h>
  29 #include <syslog.h>
  30 #include <sched.h>
  31 #include <sys/resource.h>
  32 #include <linux/sched.h>
  33 #include <sys/types.h>
  34 #include <sys/stat.h>
  35 #include <fcntl.h>
  36 #include <dirent.h>
  37 #include <sys/ioctl.h>
  38 #include <linux/vt.h>
  39 #include <linux/tiocl.h>
  40 #include <termios.h>
  41 #include <stdarg.h>
  42 #include <sys/inotify.h>
  43 #include <sys/poll.h>
  44
  45 #include "macro.h"
  46 #include "util.h"
  47 #include "ioprio.h"
  48 #include "missing.h"
  49 #include "log.h"
  50 #include "strv.h"
  51
  52 bool streq_ptr(const char *a, const char *b) {
  53
  54         /* Like streq(), but tries to make sense of NULL pointers */
  55
  56         if (a && b)
  57                 return streq(a, b);
  58
  59         if (!a && !b)
  60                 return true;
  61
  62         return false;
  63 }
  64
  65 usec_t now(clockid_t clock_id) {
  66         struct timespec ts;
  67
  68         assert_se(clock_gettime(clock_id, &ts) == 0);
  69
  70         return timespec_load(&ts);
  71 }
  72
  73 usec_t timespec_load(const struct timespec *ts) {
  74         assert(ts);
  75
  76         return
  77                 (usec_t) ts->tv_sec * USEC_PER_SEC +
  78                 (usec_t) ts->tv_nsec / NSEC_PER_USEC;
  79 }
  80
  81 struct timespec *timespec_store(struct timespec *ts, usec_t u)  {
  82         assert(ts);
  83
  84         ts->tv_sec = (time_t) (u / USEC_PER_SEC);
  85         ts->tv_nsec = (long int) ((u % USEC_PER_SEC) * NSEC_PER_USEC);
  86
  87         return ts;
  88 }
  89
  90 usec_t timeval_load(const struct timeval *tv) {
  91         assert(tv);
  92
  93         return
  94                 (usec_t) tv->tv_sec * USEC_PER_SEC +
  95                 (usec_t) tv->tv_usec;
  96 }
  97
  98 struct timeval *timeval_store(struct timeval *tv, usec_t u) {
  99         assert(tv);
 100
 101         tv->tv_sec = (time_t) (u / USEC_PER_SEC);
 102         tv->tv_usec = (suseconds_t) (u % USEC_PER_SEC);
 103
 104         return tv;
 105 }
 106
 107 bool endswith(const char *s, const char *postfix) {
 108         size_t sl, pl;
 109
 110         assert(s);
 111         assert(postfix);
 112
 113         sl = strlen(s);
 114         pl = strlen(postfix);
 115
 116         if (sl < pl)
 117                 return false;
 118
 119         return memcmp(s + sl - pl, postfix, pl) == 0;
 120 }
 121
 122 bool startswith(const char *s, const char *prefix) {
 123         size_t sl, pl;
 124
 125         assert(s);
 126         assert(prefix);
 127
 128         sl = strlen(s);
 129         pl = strlen(prefix);
 130
 131         if (sl < pl)
 132                 return false;
 133
 134         return memcmp(s, prefix, pl) == 0;
 135 }
 136
 137 bool first_word(const char *s, const char *word) {
 138         size_t sl, wl;
 139
 140         assert(s);
 141         assert(word);
 142
 143         sl = strlen(s);
 144         wl = strlen(word);
 145
 146         if (sl < wl)
 147                 return false;
 148
 149         if (memcmp(s, word, wl) != 0)
 150                 return false;
 151
 152         return (s[wl] == 0 ||
 153                 strchr(WHITESPACE, s[wl]));
 154 }
 155
 156 int close_nointr(int fd) {
 157         assert(fd >= 0);
 158
 159         for (;;) {
 160                 int r;
 161
 162                 if ((r = close(fd)) >= 0)
 163                         return r;
 164
 165                 if (errno != EINTR)
 166                         return r;
 167         }
 168 }
 169
 170 void close_nointr_nofail(int fd) {
 171         int saved_errno = errno;
 172
 173         /* like close_nointr() but cannot fail, and guarantees errno
 174          * is unchanged */
 175
 176         assert_se(close_nointr(fd) == 0);
 177
 178         errno = saved_errno;
 179 }
 180
 181 int parse_boolean(const char *v) {
 182         assert(v);
 183
 184         if (streq(v, "1") || v[0] == 'y' || v[0] == 'Y' || v[0] == 't' || v[0] == 'T' || !strcasecmp(v, "on"))
 185                 return 1;
 186         else if (streq(v, "0") || v[0] == 'n' || v[0] == 'N' || v[0] == 'f' || v[0] == 'F' || !strcasecmp(v, "off"))
 187                 return 0;
 188
 189         return -EINVAL;
 190 }
 191
 192 int safe_atou(const char *s, unsigned *ret_u) {
 193         char *x = NULL;
 194         unsigned long l;
 195
 196         assert(s);
 197         assert(ret_u);
 198
 199         errno = 0;
 200         l = strtoul(s, &x, 0);
 201
 202         if (!x || *x || errno)
 203                 return errno ? -errno : -EINVAL;
 204
 205         if ((unsigned long) (unsigned) l != l)
 206                 return -ERANGE;
 207
 208         *ret_u = (unsigned) l;
 209         return 0;
 210 }
 211
 212 int safe_atoi(const char *s, int *ret_i) {
 213         char *x = NULL;
 214         long l;
 215
 216         assert(s);
 217         assert(ret_i);
 218
 219         errno = 0;
 220         l = strtol(s, &x, 0);
 221
 222         if (!x || *x || errno)
 223                 return errno ? -errno : -EINVAL;
 224
 225         if ((long) (int) l != l)
 226                 return -ERANGE;
 227
 228         *ret_i = (int) l;
 229         return 0;
 230 }
 231
 232 int safe_atolu(const char *s, long unsigned *ret_lu) {
 233         char *x = NULL;
 234         unsigned long l;
 235
 236         assert(s);
 237         assert(ret_lu);
 238
 239         errno = 0;
 240         l = strtoul(s, &x, 0);
 241
 242         if (!x || *x || errno)
 243                 return errno ? -errno : -EINVAL;
 244
 245         *ret_lu = l;
 246         return 0;
 247 }
 248
 249 int safe_atoli(const char *s, long int *ret_li) {
 250         char *x = NULL;
 251         long l;
 252
 253         assert(s);
 254         assert(ret_li);
 255
 256         errno = 0;
 257         l = strtol(s, &x, 0);
 258
 259         if (!x || *x || errno)
 260                 return errno ? -errno : -EINVAL;
 261
 262         *ret_li = l;
 263         return 0;
 264 }
 265
 266 int safe_atollu(const char *s, long long unsigned *ret_llu) {
 267         char *x = NULL;
 268         unsigned long long l;
 269
 270         assert(s);
 271         assert(ret_llu);
 272
 273         errno = 0;
 274         l = strtoull(s, &x, 0);
 275
 276         if (!x || *x || errno)
 277                 return errno ? -errno : -EINVAL;
 278
 279         *ret_llu = l;
 280         return 0;
 281 }
 282
 283 int safe_atolli(const char *s, long long int *ret_lli) {
 284         char *x = NULL;
 285         long long l;
 286
 287         assert(s);
 288         assert(ret_lli);
 289
 290         errno = 0;
 291         l = strtoll(s, &x, 0);
 292
 293         if (!x || *x || errno)
 294                 return errno ? -errno : -EINVAL;
 295
 296         *ret_lli = l;
 297         return 0;
 298 }
 299
 300 /* Split a string into words. */
 301 char *split(const char *c, size_t *l, const char *separator, char **state) {
 302         char *current;
 303
 304         current = *state ? *state : (char*) c;
 305
 306         if (!*current || *c == 0)
 307                 return NULL;
 308
 309         current += strspn(current, separator);
 310         *l = strcspn(current, separator);
 311         *state = current+*l;
 312
 313         return (char*) current;
 314 }
 315
 316 /* Split a string into words, but consider strings enclosed in '' and
 317  * "" as words even if they include spaces. */
 318 char *split_quoted(const char *c, size_t *l, char **state) {
 319         char *current;
 320
 321         current = *state ? *state : (char*) c;
 322
 323         if (!*current || *c == 0)
 324                 return NULL;
 325
 326         current += strspn(current, WHITESPACE);
 327
 328         if (*current == '\'') {
 329                 current ++;
 330                 *l = strcspn(current, "'");
 331                 *state = current+*l;
 332
 333                 if (**state == '\'')
 334                         (*state)++;
 335         } else if (*current == '\"') {
 336                 current ++;
 337                 *l = strcspn(current, "\"");
 338                 *state = current+*l;
 339
 340                 if (**state == '\"')
 341                         (*state)++;
 342         } else {
 343                 *l = strcspn(current, WHITESPACE);
 344                 *state = current+*l;
 345         }
 346
 347         /* FIXME: Cannot deal with strings that have spaces AND ticks
 348          * in them */
 349
 350         return (char*) current;
 351 }
 352
 353 char **split_path_and_make_absolute(const char *p) {
 354         char **l;
 355         assert(p);
 356
 357         if (!(l = strv_split(p, ":")))
 358                 return NULL;
 359
 360         if (!strv_path_make_absolute_cwd(l)) {
 361                 strv_free(l);
 362                 return NULL;
 363         }
 364
 365         return l;
 366 }
 367
 368 int get_parent_of_pid(pid_t pid, pid_t *_ppid) {
 369         int r;
 370         FILE *f;
 371         char fn[132], line[256], *p;
 372         long long unsigned ppid;
 373
 374         assert(pid >= 0);
 375         assert(_ppid);
 376
 377         assert_se(snprintf(fn, sizeof(fn)-1, "/proc/%llu/stat", (unsigned long long) pid) < (int) (sizeof(fn)-1));
 378         fn[sizeof(fn)-1] = 0;
 379
 380         if (!(f = fopen(fn, "r")))
 381                 return -errno;
 382
 383         if (!(fgets(line, sizeof(line), f))) {
 384                 r = -errno;
 385                 fclose(f);
 386                 return r;
 387         }
 388
 389         fclose(f);
 390
 391         /* Let's skip the pid and comm fields. The latter is enclosed
 392          * in () but does not escape any () in its value, so let's
 393          * skip over it manually */
 394
 395         if (!(p = strrchr(line, ')')))
 396                 return -EIO;
 397
 398         p++;
 399
 400         if (sscanf(p, " "
 401                    "%*c "  /* state */
 402                    "%llu ", /* ppid */
 403                    &ppid) != 1)
 404                 return -EIO;
 405
 406         if ((long long unsigned) (pid_t) ppid != ppid)
 407                 return -ERANGE;
 408
 409         *_ppid = (pid_t) ppid;
 410
 411         return 0;
 412 }
 413
 414 int write_one_line_file(const char *fn, const char *line) {
 415         FILE *f;
 416         int r;
 417
 418         assert(fn);
 419         assert(line);
 420
 421         if (!(f = fopen(fn, "we")))
 422                 return -errno;
 423
 424         if (fputs(line, f) < 0) {
 425                 r = -errno;
 426                 goto finish;
 427         }
 428
 429         r = 0;
 430 finish:
 431         fclose(f);
 432         return r;
 433 }
 434
 435 int read_one_line_file(const char *fn, char **line) {
 436         FILE *f;
 437         int r;
 438         char t[2048], *c;
 439
 440         assert(fn);
 441         assert(line);
 442
 443         if (!(f = fopen(fn, "re")))
 444                 return -errno;
 445
 446         if (!(fgets(t, sizeof(t), f))) {
 447                 r = -errno;
 448                 goto finish;
 449         }
 450
 451         if (!(c = strdup(t))) {
 452                 r = -ENOMEM;
 453                 goto finish;
 454         }
 455
 456         *line = c;
 457         r = 0;
 458
 459 finish:
 460         fclose(f);
 461         return r;
 462 }
 463
 464 char *truncate_nl(char *s) {
 465         assert(s);
 466
 467         s[strcspn(s, NEWLINE)] = 0;
 468         return s;
 469 }
 470
 471 int get_process_name(pid_t pid, char **name) {
 472         char *p;
 473         int r;
 474
 475         assert(pid >= 1);
 476         assert(name);
 477
 478         if (asprintf(&p, "/proc/%llu/comm", (unsigned long long) pid) < 0)
 479                 return -ENOMEM;
 480
 481         r = read_one_line_file(p, name);
 482         free(p);
 483
 484         if (r < 0)
 485                 return r;
 486
 487         truncate_nl(*name);
 488         return 0;
 489 }
 490
 491 char *strappend(const char *s, const char *suffix) {
 492         size_t a, b;
 493         char *r;
 494
 495         assert(s);
 496         assert(suffix);
 497
 498         a = strlen(s);
 499         b = strlen(suffix);
 500
 501         if (!(r = new(char, a+b+1)))
 502                 return NULL;
 503
 504         memcpy(r, s, a);
 505         memcpy(r+a, suffix, b);
 506         r[a+b] = 0;
 507
 508         return r;
 509 }
 510
 511 int readlink_malloc(const char *p, char **r) {
 512         size_t l = 100;
 513
 514         assert(p);
 515         assert(r);
 516
 517         for (;;) {
 518                 char *c;
 519                 ssize_t n;
 520
 521                 if (!(c = new(char, l)))
 522                         return -ENOMEM;
 523
 524                 if ((n = readlink(p, c, l-1)) < 0) {
 525                         int ret = -errno;
 526                         free(c);
 527                         return ret;
 528                 }
 529
 530                 if ((size_t) n < l-1) {
 531                         c[n] = 0;
 532                         *r = c;
 533                         return 0;
 534                 }
 535
 536                 free(c);
 537                 l *= 2;
 538         }
 539 }
 540
 541 char *file_name_from_path(const char *p) {
 542         char *r;
 543
 544         assert(p);
 545
 546         if ((r = strrchr(p, '/')))
 547                 return r + 1;
 548
 549         return (char*) p;
 550 }
 551
 552 bool path_is_absolute(const char *p) {
 553         assert(p);
 554
 555         return p[0] == '/';
 556 }
 557
 558 bool is_path(const char *p) {
 559
 560         return !!strchr(p, '/');
 561 }
 562
 563 char *path_make_absolute(const char *p, const char *prefix) {
 564         char *r;
 565
 566         assert(p);
 567
 568         /* Makes every item in the list an absolute path by prepending
 569          * the prefix, if specified and necessary */
 570
 571         if (path_is_absolute(p) || !prefix)
 572                 return strdup(p);
 573
 574         if (asprintf(&r, "%s/%s", prefix, p) < 0)
 575                 return NULL;
 576
 577         return r;
 578 }
 579
 580 char *path_make_absolute_cwd(const char *p) {
 581         char *cwd, *r;
 582
 583         assert(p);
 584
 585         /* Similar to path_make_absolute(), but prefixes with the
 586          * current working directory. */
 587
 588         if (path_is_absolute(p))
 589                 return strdup(p);
 590
 591         if (!(cwd = get_current_dir_name()))
 592                 return NULL;
 593
 594         r = path_make_absolute(p, cwd);
 595         free(cwd);
 596
 597         return r;
 598 }
 599
 600 char **strv_path_make_absolute_cwd(char **l) {
 601         char **s;
 602
 603         /* Goes through every item in the string list and makes it
 604          * absolute. This works in place and won't rollback any
 605          * changes on failure. */
 606
 607         STRV_FOREACH(s, l) {
 608                 char *t;
 609
 610                 if (!(t = path_make_absolute_cwd(*s)))
 611                         return NULL;
 612
 613                 free(*s);
 614                 *s = t;
 615         }
 616
 617         return l;
 618 }
 619
 620 int reset_all_signal_handlers(void) {
 621         int sig;
 622
 623         for (sig = 1; sig < _NSIG; sig++) {
 624                 struct sigaction sa;
 625
 626                 if (sig == SIGKILL || sig == SIGSTOP)
 627                         continue;
 628
 629                 zero(sa);
 630                 sa.sa_handler = SIG_DFL;
 631                 sa.sa_flags = SA_RESTART;
 632
 633                 /* On Linux the first two RT signals are reserved by
 634                  * glibc, and sigaction() will return EINVAL for them. */
 635                 if ((sigaction(sig, &sa, NULL) < 0))
 636                         if (errno != EINVAL)
 637                                 return -errno;
 638         }
 639
 640         return 0;
 641 }
 642
 643 char *strstrip(char *s) {
 644         char *e, *l = NULL;
 645
 646         /* Drops trailing whitespace. Modifies the string in
 647          * place. Returns pointer to first non-space character */
 648
 649         s += strspn(s, WHITESPACE);
 650
 651         for (e = s; *e; e++)
 652                 if (!strchr(WHITESPACE, *e))
 653                         l = e;
 654
 655         if (l)
 656                 *(l+1) = 0;
 657         else
 658                 *s = 0;
 659
 660         return s;
 661 }
 662
 663 char *delete_chars(char *s, const char *bad) {
 664         char *f, *t;
 665
 666         /* Drops all whitespace, regardless where in the string */
 667
 668         for (f = s, t = s; *f; f++) {
 669                 if (strchr(bad, *f))
 670                         continue;
 671
 672                 *(t++) = *f;
 673         }
 674
 675         *t = 0;
 676
 677         return s;
 678 }
 679
 680 char *file_in_same_dir(const char *path, const char *filename) {
 681         char *e, *r;
 682         size_t k;
 683
 684         assert(path);
 685         assert(filename);
 686
 687         /* This removes the last component of path and appends
 688          * filename, unless the latter is absolute anyway or the
 689          * former isn't */
 690
 691         if (path_is_absolute(filename))
 692                 return strdup(filename);
 693
 694         if (!(e = strrchr(path, '/')))
 695                 return strdup(filename);
 696
 697         k = strlen(filename);
 698         if (!(r = new(char, e-path+1+k+1)))
 699                 return NULL;
 700
 701         memcpy(r, path, e-path+1);
 702         memcpy(r+(e-path)+1, filename, k+1);
 703
 704         return r;
 705 }
 706
 707 int mkdir_parents(const char *path, mode_t mode) {
 708         const char *p, *e;
 709
 710         assert(path);
 711
 712         /* Creates every parent directory in the path except the last
 713          * component. */
 714
 715         p = path + strspn(path, "/");
 716         for (;;) {
 717                 int r;
 718                 char *t;
 719
 720                 e = p + strcspn(p, "/");
 721                 p = e + strspn(e, "/");
 722
 723                 /* Is this the last component? If so, then we're
 724                  * done */
 725                 if (*p == 0)
 726                         return 0;
 727
 728                 if (!(t = strndup(path, e - path)))
 729                         return -ENOMEM;
 730
 731                 r = mkdir(t, mode);
 732
 733                 free(t);
 734
 735                 if (r < 0 && errno != EEXIST)
 736                         return -errno;
 737         }
 738 }
 739
 740 int mkdir_p(const char *path, mode_t mode) {
 741         int r;
 742
 743         /* Like mkdir -p */
 744
 745         if ((r = mkdir_parents(path, mode)) < 0)
 746                 return r;
 747
 748         if (mkdir(path, mode) < 0)
 749                 return -errno;
 750
 751         return 0;
 752 }
 753
 754 char hexchar(int x) {
 755         static const char table[16] = "0123456789abcdef";
 756
 757         return table[x & 15];
 758 }
 759
 760 int unhexchar(char c) {
 761
 762         if (c >= '0' && c <= '9')
 763                 return c - '0';
 764
 765         if (c >= 'a' && c <= 'f')
 766                 return c - 'a' + 10;
 767
 768         if (c >= 'A' && c <= 'F')
 769                 return c - 'A' + 10;
 770
 771         return -1;
 772 }
 773
 774 char octchar(int x) {
 775         return '0' + (x & 7);
 776 }
 777
 778 int unoctchar(char c) {
 779
 780         if (c >= '0' && c <= '7')
 781                 return c - '0';
 782
 783         return -1;
 784 }
 785
 786 char decchar(int x) {
 787         return '0' + (x % 10);
 788 }
 789
 790 int undecchar(char c) {
 791
 792         if (c >= '0' && c <= '9')
 793                 return c - '0';
 794
 795         return -1;
 796 }
 797
 798 char *cescape(const char *s) {
 799         char *r, *t;
 800         const char *f;
 801
 802         assert(s);
 803
 804         /* Does C style string escaping. */
 805
 806         if (!(r = new(char, strlen(s)*4 + 1)))
 807                 return NULL;
 808
 809         for (f = s, t = r; *f; f++)
 810
 811                 switch (*f) {
 812
 813                 case '\a':
 814                         *(t++) = '\\';
 815                         *(t++) = 'a';
 816                         break;
 817                 case '\b':
 818                         *(t++) = '\\';
 819                         *(t++) = 'b';
 820                         break;
 821                 case '\f':
 822                         *(t++) = '\\';
 823                         *(t++) = 'f';
 824                         break;
 825                 case '\n':
 826                         *(t++) = '\\';
 827                         *(t++) = 'n';
 828                         break;
 829                 case '\r':
 830                         *(t++) = '\\';
 831                         *(t++) = 'r';
 832                         break;
 833                 case '\t':
 834                         *(t++) = '\\';
 835                         *(t++) = 't';
 836                         break;
 837                 case '\v':
 838                         *(t++) = '\\';
 839                         *(t++) = 'v';
 840                         break;
 841                 case '\\':
 842                         *(t++) = '\\';
 843                         *(t++) = '\\';
 844                         break;
 845                 case '"':
 846                         *(t++) = '\\';
 847                         *(t++) = '"';
 848                         break;
 849                 case '\'':
 850                         *(t++) = '\\';
 851                         *(t++) = '\'';
 852                         break;
 853
 854                 default:
 855                         /* For special chars we prefer octal over
 856                          * hexadecimal encoding, simply because glib's
 857                          * g_strescape() does the same */
 858                         if ((*f < ' ') || (*f >= 127)) {
 859                                 *(t++) = '\\';
 860                                 *(t++) = octchar((unsigned char) *f >> 6);
 861                                 *(t++) = octchar((unsigned char) *f >> 3);
 862                                 *(t++) = octchar((unsigned char) *f);
 863                         } else
 864                                 *(t++) = *f;
 865                         break;
 866                 }
 867
 868         *t = 0;
 869
 870         return r;
 871 }
 872
 873 char *cunescape(const char *s) {
 874         char *r, *t;
 875         const char *f;
 876
 877         assert(s);
 878
 879         /* Undoes C style string escaping */
 880
 881         if (!(r = new(char, strlen(s)+1)))
 882                 return r;
 883
 884         for (f = s, t = r; *f; f++) {
 885
 886                 if (*f != '\\') {
 887                         *(t++) = *f;
 888                         continue;
 889                 }
 890
 891                 f++;
 892
 893                 switch (*f) {
 894
 895                 case 'a':
 896                         *(t++) = '\a';
 897                         break;
 898                 case 'b':
 899                         *(t++) = '\b';
 900                         break;
 901                 case 'f':
 902                         *(t++) = '\f';
 903                         break;
 904                 case 'n':
 905                         *(t++) = '\n';
 906                         break;
 907                 case 'r':
 908                         *(t++) = '\r';
 909                         break;
 910                 case 't':
 911                         *(t++) = '\t';
 912                         break;
 913                 case 'v':
 914                         *(t++) = '\v';
 915                         break;
 916                 case '\\':
 917                         *(t++) = '\\';
 918                         break;
 919                 case '"':
 920                         *(t++) = '"';
 921                         break;
 922                 case '\'':
 923                         *(t++) = '\'';
 924                         break;
 925
 926                 case 'x': {
 927                         /* hexadecimal encoding */
 928                         int a, b;
 929
 930                         if ((a = unhexchar(f[1])) < 0 ||
 931                             (b = unhexchar(f[2])) < 0) {
 932                                 /* Invalid escape code, let's take it literal then */
 933                                 *(t++) = '\\';
 934                                 *(t++) = 'x';
 935                         } else {
 936                                 *(t++) = (char) ((a << 4) | b);
 937                                 f += 2;
 938                         }
 939
 940                         break;
 941                 }
 942
 943                 case '0':
 944                 case '1':
 945                 case '2':
 946                 case '3':
 947                 case '4':
 948                 case '5':
 949                 case '6':
 950                 case '7': {
 951                         /* octal encoding */
 952                         int a, b, c;
 953
 954                         if ((a = unoctchar(f[0])) < 0 ||
 955                             (b = unoctchar(f[1])) < 0 ||
 956                             (c = unoctchar(f[2])) < 0) {
 957                                 /* Invalid escape code, let's take it literal then */
 958                                 *(t++) = '\\';
 959                                 *(t++) = f[0];
 960                         } else {
 961                                 *(t++) = (char) ((a << 6) | (b << 3) | c);
 962                                 f += 2;
 963                         }
 964
 965                         break;
 966                 }
 967
 968                 case 0:
 969                         /* premature end of string.*/
 970                         *(t++) = '\\';
 971                         goto finish;
 972
 973                 default:
 974                         /* Invalid escape code, let's take it literal then */
 975                         *(t++) = '\\';
 976                         *(t++) = 'f';
 977                         break;
 978                 }
 979         }
 980
 981 finish:
 982         *t = 0;
 983         return r;
 984 }
 985
 986
 987 char *xescape(const char *s, const char *bad) {
 988         char *r, *t;
 989         const char *f;
 990
 991         /* Escapes all chars in bad, in addition to \ and all special
 992          * chars, in \xFF style escaping. May be reversed with
 993          * cunescape. */
 994
 995         if (!(r = new(char, strlen(s)*4+1)))
 996                 return NULL;
 997
 998         for (f = s, t = r; *f; f++) {
 999
1000                 if ((*f < ' ') || (*f >= 127) ||
1001                     (*f == '\\') || strchr(bad, *f)) {
1002                         *(t++) = '\\';
1003                         *(t++) = 'x';
1004                         *(t++) = hexchar(*f >> 4);
1005                         *(t++) = hexchar(*f);
1006                 } else
1007                         *(t++) = *f;
1008         }
1009
1010         *t = 0;
1011
1012         return r;
1013 }
1014
1015 char *bus_path_escape(const char *s) {
1016         char *r, *t;
1017         const char *f;
1018
1019         assert(s);
1020
1021         /* Escapes all chars that D-Bus' object path cannot deal
1022          * with. Can be reverse with bus_path_unescape() */
1023
1024         if (!(r = new(char, strlen(s)*3+1)))
1025                 return NULL;
1026
1027         for (f = s, t = r; *f; f++) {
1028
1029                 if (!(*f >= 'A' && *f <= 'Z') &&
1030                     !(*f >= 'a' && *f <= 'z') &&
1031                     !(*f >= '0' && *f <= '9')) {
1032                         *(t++) = '_';
1033                         *(t++) = hexchar(*f >> 4);
1034                         *(t++) = hexchar(*f);
1035                 } else
1036                         *(t++) = *f;
1037         }
1038
1039         *t = 0;
1040
1041         return r;
1042 }
1043
1044 char *bus_path_unescape(const char *f) {
1045         char *r, *t;
1046
1047         assert(f);
1048
1049         if (!(r = strdup(f)))
1050                 return NULL;
1051
1052         for (t = r; *f; f++) {
1053
1054                 if (*f == '_') {
1055                         int a, b;
1056
1057                         if ((a = unhexchar(f[1])) < 0 ||
1058                             (b = unhexchar(f[2])) < 0) {
1059                                 /* Invalid escape code, let's take it literal then */
1060                                 *(t++) = '_';
1061                         } else {
1062                                 *(t++) = (char) ((a << 4) | b);
1063                                 f += 2;
1064                         }
1065                 } else
1066                         *(t++) = *f;
1067         }
1068
1069         *t = 0;
1070
1071         return r;
1072 }
1073
1074 char *path_kill_slashes(char *path) {
1075         char *f, *t;
1076         bool slash = false;
1077
1078         /* Removes redundant inner and trailing slashes. Modifies the
1079          * passed string in-place.
1080          *
1081          * ///foo///bar/ becomes /foo/bar
1082          */
1083
1084         for (f = path, t = path; *f; f++) {
1085
1086                 if (*f == '/') {
1087                         slash = true;
1088                         continue;
1089                 }
1090
1091                 if (slash) {
1092                         slash = false;
1093                         *(t++) = '/';
1094                 }
1095
1096                 *(t++) = *f;
1097         }
1098
1099         /* Special rule, if we are talking of the root directory, a
1100         trailing slash is good */
1101
1102         if (t == path && slash)
1103                 *(t++) = '/';
1104
1105         *t = 0;
1106         return path;
1107 }
1108
1109 bool path_startswith(const char *path, const char *prefix) {
1110         assert(path);
1111         assert(prefix);
1112
1113         if ((path[0] == '/') != (prefix[0] == '/'))
1114                 return false;
1115
1116         for (;;) {
1117                 size_t a, b;
1118
1119                 path += strspn(path, "/");
1120                 prefix += strspn(prefix, "/");
1121
1122                 if (*prefix == 0)
1123                         return true;
1124
1125                 if (*path == 0)
1126                         return false;
1127
1128                 a = strcspn(path, "/");
1129                 b = strcspn(prefix, "/");
1130
1131                 if (a != b)
1132                         return false;
1133
1134                 if (memcmp(path, prefix, a) != 0)
1135                         return false;
1136
1137                 path += a;
1138                 prefix += b;
1139         }
1140 }
1141
1142 char *ascii_strlower(char *t) {
1143         char *p;
1144
1145         assert(t);
1146
1147         for (p = t; *p; p++)
1148                 if (*p >= 'A' && *p <= 'Z')
1149                         *p = *p - 'A' + 'a';
1150
1151         return t;
1152 }
1153
1154 bool ignore_file(const char *filename) {
1155         assert(filename);
1156
1157         return
1158                 filename[0] == '.' ||
1159                 endswith(filename, "~") ||
1160                 endswith(filename, ".rpmnew") ||
1161                 endswith(filename, ".rpmsave") ||
1162                 endswith(filename, ".rpmorig") ||
1163                 endswith(filename, ".dpkg-old") ||
1164                 endswith(filename, ".dpkg-new") ||
1165                 endswith(filename, ".swp");
1166 }
1167
1168 int fd_nonblock(int fd, bool nonblock) {
1169         int flags;
1170
1171         assert(fd >= 0);
1172
1173         if ((flags = fcntl(fd, F_GETFL, 0)) < 0)
1174                 return -errno;
1175
1176         if (nonblock)
1177                 flags |= O_NONBLOCK;
1178         else
1179                 flags &= ~O_NONBLOCK;
1180
1181         if (fcntl(fd, F_SETFL, flags) < 0)
1182                 return -errno;
1183
1184         return 0;
1185 }
1186
1187 int fd_cloexec(int fd, bool cloexec) {
1188         int flags;
1189
1190         assert(fd >= 0);
1191
1192         if ((flags = fcntl(fd, F_GETFD, 0)) < 0)
1193                 return -errno;
1194
1195         if (cloexec)
1196                 flags |= FD_CLOEXEC;
1197         else
1198                 flags &= ~FD_CLOEXEC;
1199
1200         if (fcntl(fd, F_SETFD, flags) < 0)
1201                 return -errno;
1202
1203         return 0;
1204 }
1205
1206 int close_all_fds(const int except[], unsigned n_except) {
1207         DIR *d;
1208         struct dirent *de;
1209         int r = 0;
1210
1211         if (!(d = opendir("/proc/self/fd")))
1212                 return -errno;
1213
1214         while ((de = readdir(d))) {
1215                 int fd = -1;
1216
1217                 if (de->d_name[0] == '.')
1218                         continue;
1219
1220                 if ((r = safe_atoi(de->d_name, &fd)) < 0)
1221                         goto finish;
1222
1223                 if (fd < 3)
1224                         continue;
1225
1226                 if (fd == dirfd(d))
1227                         continue;
1228
1229                 if (except) {
1230                         bool found;
1231                         unsigned i;
1232
1233                         found = false;
1234                         for (i = 0; i < n_except; i++)
1235                                 if (except[i] == fd) {
1236                                         found = true;
1237                                         break;
1238                                 }
1239
1240                         if (found)
1241                                 continue;
1242                 }
1243
1244                 if ((r = close_nointr(fd)) < 0) {
1245                         /* Valgrind has its own FD and doesn't want to have it closed */
1246                         if (errno != EBADF)
1247                                 goto finish;
1248                 }
1249         }
1250
1251         r = 0;
1252
1253 finish:
1254         closedir(d);
1255         return r;
1256 }
1257
1258 bool chars_intersect(const char *a, const char *b) {
1259         const char *p;
1260
1261         /* Returns true if any of the chars in a are in b. */
1262         for (p = a; *p; p++)
1263                 if (strchr(b, *p))
1264                         return true;
1265
1266         return false;
1267 }
1268
1269 char *format_timestamp(char *buf, size_t l, usec_t t) {
1270         struct tm tm;
1271         time_t sec;
1272
1273         assert(buf);
1274         assert(l > 0);
1275
1276         if (t <= 0)
1277                 return NULL;
1278
1279         sec = (time_t) t / USEC_PER_SEC;
1280
1281         if (strftime(buf, l, "%a, %d %b %Y %H:%M:%S %z", localtime_r(&sec, &tm)) <= 0)
1282                 return NULL;
1283
1284         return buf;
1285 }
1286
1287 bool fstype_is_network(const char *fstype) {
1288         static const char * const table[] = {
1289                 "cifs",
1290                 "smbfs",
1291                 "ncpfs",
1292                 "nfs",
1293                 "nfs4"
1294         };
1295
1296         unsigned i;
1297
1298         for (i = 0; i < ELEMENTSOF(table); i++)
1299                 if (streq(table[i], fstype))
1300                         return true;
1301
1302         return false;
1303 }
1304
1305 int chvt(int vt) {
1306         int fd, r = 0;
1307
1308         if ((fd = open("/dev/tty0", O_RDWR|O_NOCTTY|O_CLOEXEC)) < 0)
1309                 return -errno;
1310
1311         if (vt < 0) {
1312                 int tiocl[2] = {
1313                         TIOCL_GETKMSGREDIRECT,
1314                         0
1315                 };
1316
1317                 if (ioctl(fd, TIOCLINUX, tiocl) < 0)
1318                         return -errno;
1319
1320                 vt = tiocl[0] <= 0 ? 1 : tiocl[0];
1321         }
1322
1323         if (ioctl(fd, VT_ACTIVATE, vt) < 0)
1324                 r = -errno;
1325
1326         close_nointr(r);
1327         return r;
1328 }
1329
1330 int read_one_char(FILE *f, char *ret, bool *need_nl) {
1331         struct termios old_termios, new_termios;
1332         char c;
1333         char line[1024];
1334
1335         assert(f);
1336         assert(ret);
1337
1338         if (tcgetattr(fileno(f), &old_termios) >= 0) {
1339                 new_termios = old_termios;
1340
1341                 new_termios.c_lflag &= ~ICANON;
1342                 new_termios.c_cc[VMIN] = 1;
1343                 new_termios.c_cc[VTIME] = 0;
1344
1345                 if (tcsetattr(fileno(f), TCSADRAIN, &new_termios) >= 0) {
1346                         size_t k;
1347
1348                         k = fread(&c, 1, 1, f);
1349
1350                         tcsetattr(fileno(f), TCSADRAIN, &old_termios);
1351
1352                         if (k <= 0)
1353                                 return -EIO;
1354
1355                         if (need_nl)
1356                                 *need_nl = c != '\n';
1357
1358                         *ret = c;
1359                         return 0;
1360                 }
1361         }
1362
1363         if (!(fgets(line, sizeof(line), f)))
1364                 return -EIO;
1365
1366         truncate_nl(line);
1367
1368         if (strlen(line) != 1)
1369                 return -EBADMSG;
1370
1371         if (need_nl)
1372                 *need_nl = false;
1373
1374         *ret = line[0];
1375         return 0;
1376 }
1377
1378 int ask(char *ret, const char *replies, const char *text, ...) {
1379         assert(ret);
1380         assert(replies);
1381         assert(text);
1382
1383         for (;;) {
1384                 va_list ap;
1385                 char c;
1386                 int r;
1387                 bool need_nl = true;
1388
1389                 va_start(ap, text);
1390                 vprintf(text, ap);
1391                 va_end(ap);
1392
1393                 fflush(stdout);
1394
1395                 if ((r = read_one_char(stdin, &c, &need_nl)) < 0) {
1396
1397                         if (r == -EBADMSG) {
1398                                 puts("Bad input, please try again.");
1399                                 continue;
1400                         }
1401
1402                         putchar('\n');
1403                         return r;
1404                 }
1405
1406                 if (need_nl)
1407                         putchar('\n');
1408
1409                 if (strchr(replies, c)) {
1410                         *ret = c;
1411                         return 0;
1412                 }
1413
1414                 puts("Read unexpected character, please try again.");
1415         }
1416 }
1417
1418 int reset_terminal(int fd) {
1419         struct termios termios;
1420         int r = 0;
1421
1422         assert(fd >= 0);
1423
1424         /* Set terminal to some sane defaults */
1425
1426         if (tcgetattr(fd, &termios) < 0) {
1427                 r = -errno;
1428                 goto finish;
1429         }
1430
1431         /* We only reset the stuff that matters to the software. How
1432          * hardware is set up we don't touch assuming that somebody
1433          * else will do that for us */
1434
1435         termios.c_iflag &= ~(IGNBRK | BRKINT | ISTRIP | INLCR | IGNCR | IUCLC);
1436         termios.c_iflag |= ICRNL | IMAXBEL | IUTF8;
1437         termios.c_oflag |= ONLCR;
1438         termios.c_cflag |= CREAD;
1439         termios.c_lflag = ISIG | ICANON | IEXTEN | ECHO | ECHOE | ECHOK | ECHOCTL | ECHOPRT | ECHOKE;
1440
1441         termios.c_cc[VINTR]    =   03;  /* ^C */
1442         termios.c_cc[VQUIT]    =  034;  /* ^\ */
1443         termios.c_cc[VERASE]   = 0177;
1444         termios.c_cc[VKILL]    =  025;  /* ^X */
1445         termios.c_cc[VEOF]     =   04;  /* ^D */
1446         termios.c_cc[VSTART]   =  021;  /* ^Q */
1447         termios.c_cc[VSTOP]    =  023;  /* ^S */
1448         termios.c_cc[VSUSP]    =  032;  /* ^Z */
1449         termios.c_cc[VLNEXT]   =  026;  /* ^V */
1450         termios.c_cc[VWERASE]  =  027;  /* ^W */
1451         termios.c_cc[VREPRINT] =  022;  /* ^R */
1452         termios.c_cc[VEOL]     =    0;
1453         termios.c_cc[VEOL2]    =    0;
1454
1455         termios.c_cc[VTIME]  = 0;
1456         termios.c_cc[VMIN]   = 1;
1457
1458         if (tcsetattr(fd, TCSANOW, &termios) < 0)
1459                 r = -errno;
1460
1461 finish:
1462         /* Just in case, flush all crap out */
1463         tcflush(fd, TCIOFLUSH);
1464
1465         return r;
1466 }
1467
1468 int open_terminal(const char *name, int mode) {
1469         int fd, r;
1470
1471         if ((fd = open(name, mode)) < 0)
1472                 return -errno;
1473
1474         if ((r = isatty(fd)) < 0) {
1475                 close_nointr_nofail(fd);
1476                 return -errno;
1477         }
1478
1479         if (!r) {
1480                 close_nointr_nofail(fd);
1481                 return -ENOTTY;
1482         }
1483
1484         return fd;
1485 }
1486
1487 int flush_fd(int fd) {
1488         struct pollfd pollfd;
1489
1490         zero(pollfd);
1491         pollfd.fd = fd;
1492         pollfd.events = POLLIN;
1493
1494         for (;;) {
1495                 char buf[1024];
1496                 ssize_t l;
1497                 int r;
1498
1499                 if ((r = poll(&pollfd, 1, 0)) < 0) {
1500
1501                         if (errno == EINTR)
1502                                 continue;
1503
1504                         return -errno;
1505                 }
1506
1507                 if (r == 0)
1508                         return 0;
1509
1510                 if ((l = read(fd, buf, sizeof(buf))) < 0) {
1511
1512                         if (errno == EINTR)
1513                                 continue;
1514
1515                         if (errno == EAGAIN)
1516                                 return 0;
1517
1518                         return -errno;
1519                 }
1520
1521                 if (l <= 0)
1522                         return 0;
1523         }
1524 }
1525
1526 int acquire_terminal(const char *name, bool fail, bool force) {
1527         int fd = -1, notify = -1, r, wd;
1528
1529         assert(name);
1530
1531         /* We use inotify to be notified when the tty is closed. We
1532          * create the watch before checking if we can actually acquire
1533          * it, so that we don't lose any event.
1534          *
1535          * Note: strictly speaking this actually watches for the
1536          * device being closed, it does *not* really watch whether a
1537          * tty loses its controlling process. However, unless some
1538          * rogue process uses TIOCNOTTY on /dev/tty *after* closing
1539          * its tty otherwise this will not become a problem. As long
1540          * as the administrator makes sure not configure any service
1541          * on the same tty as an untrusted user this should not be a
1542          * problem. (Which he probably should not do anyway.) */
1543
1544         if (!fail && !force) {
1545                 if ((notify = inotify_init1(IN_CLOEXEC)) < 0) {
1546                         r = -errno;
1547                         goto fail;
1548                 }
1549
1550                 if ((wd = inotify_add_watch(notify, name, IN_CLOSE)) < 0) {
1551                         r = -errno;
1552                         goto fail;
1553                 }
1554         }
1555
1556         for (;;) {
1557                 if ((r = flush_fd(notify)) < 0)
1558                         goto fail;
1559
1560                 /* We pass here O_NOCTTY only so that we can check the return
1561                  * value TIOCSCTTY and have a reliable way to figure out if we
1562                  * successfully became the controlling process of the tty */
1563                 if ((fd = open_terminal(name, O_RDWR|O_NOCTTY)) < 0)
1564                         return -errno;
1565
1566                 /* First, try to get the tty */
1567                 if ((r = ioctl(fd, TIOCSCTTY, force)) < 0 &&
1568                     (force || fail || errno != EPERM)) {
1569                         r = -errno;
1570                         goto fail;
1571                 }
1572
1573                 if (r >= 0)
1574                         break;
1575
1576                 assert(!fail);
1577                 assert(!force);
1578                 assert(notify >= 0);
1579
1580                 for (;;) {
1581                         struct inotify_event e;
1582                         ssize_t l;
1583
1584                         if ((l = read(notify, &e, sizeof(e))) != sizeof(e)) {
1585
1586                                 if (l < 0) {
1587
1588                                         if (errno == EINTR)
1589                                                 continue;
1590
1591                                         r = -errno;
1592                                 } else
1593                                         r = -EIO;
1594
1595                                 goto fail;
1596                         }
1597
1598                         if (e.wd != wd || !(e.mask & IN_CLOSE)) {
1599                                 r = -errno;
1600                                 goto fail;
1601                         }
1602
1603                         break;
1604                 }
1605
1606                 /* We close the tty fd here since if the old session
1607                  * ended our handle will be dead. It's important that
1608                  * we do this after sleeping, so that we don't enter
1609                  * an endless loop. */
1610                 close_nointr_nofail(fd);
1611         }
1612
1613         if (notify >= 0)
1614                 close_nointr(notify);
1615
1616         if ((r = reset_terminal(fd)) < 0)
1617                 log_warning("Failed to reset terminal: %s", strerror(-r));
1618
1619         return fd;
1620
1621 fail:
1622         if (fd >= 0)
1623                 close_nointr(fd);
1624
1625         if (notify >= 0)
1626                 close_nointr(notify);
1627
1628         return r;
1629 }
1630
1631 int release_terminal(void) {
1632         int r = 0, fd;
1633
1634         if ((fd = open("/dev/tty", O_RDWR)) < 0)
1635                 return -errno;
1636
1637         if (ioctl(fd, TIOCNOTTY) < 0)
1638                 r = -errno;
1639
1640         close_nointr_nofail(fd);
1641         return r;
1642 }
1643
1644 int ignore_signal(int sig) {
1645         struct sigaction sa;
1646
1647         zero(sa);
1648         sa.sa_handler = SIG_IGN;
1649         sa.sa_flags = SA_RESTART;
1650
1651         return sigaction(sig, &sa, NULL);
1652 }
1653
1654 static const char *const ioprio_class_table[] = {
1655         [IOPRIO_CLASS_NONE] = "none",
1656         [IOPRIO_CLASS_RT] = "realtime",
1657         [IOPRIO_CLASS_BE] = "best-effort",
1658         [IOPRIO_CLASS_IDLE] = "idle"
1659 };
1660
1661 DEFINE_STRING_TABLE_LOOKUP(ioprio_class, int);
1662
1663 static const char *const sigchld_code_table[] = {
1664         [CLD_EXITED] = "exited",
1665         [CLD_KILLED] = "killed",
1666         [CLD_DUMPED] = "dumped",
1667         [CLD_TRAPPED] = "trapped",
1668         [CLD_STOPPED] = "stopped",
1669         [CLD_CONTINUED] = "continued",
1670 };
1671
1672 DEFINE_STRING_TABLE_LOOKUP(sigchld_code, int);
1673
1674 static const char *const log_facility_table[LOG_NFACILITIES] = {
1675         [LOG_FAC(LOG_KERN)] = "kern",
1676         [LOG_FAC(LOG_USER)] = "user",
1677         [LOG_FAC(LOG_MAIL)] = "mail",
1678         [LOG_FAC(LOG_DAEMON)] = "daemon",
1679         [LOG_FAC(LOG_AUTH)] = "auth",
1680         [LOG_FAC(LOG_SYSLOG)] = "syslog",
1681         [LOG_FAC(LOG_LPR)] = "lpr",
1682         [LOG_FAC(LOG_NEWS)] = "news",
1683         [LOG_FAC(LOG_UUCP)] = "uucp",
1684         [LOG_FAC(LOG_CRON)] = "cron",
1685         [LOG_FAC(LOG_AUTHPRIV)] = "authpriv",
1686         [LOG_FAC(LOG_FTP)] = "ftp",
1687         [LOG_FAC(LOG_LOCAL0)] = "local0",
1688         [LOG_FAC(LOG_LOCAL1)] = "local1",
1689         [LOG_FAC(LOG_LOCAL2)] = "local2",
1690         [LOG_FAC(LOG_LOCAL3)] = "local3",
1691         [LOG_FAC(LOG_LOCAL4)] = "local4",
1692         [LOG_FAC(LOG_LOCAL5)] = "local5",
1693         [LOG_FAC(LOG_LOCAL6)] = "local6",
1694         [LOG_FAC(LOG_LOCAL7)] = "local7"
1695 };
1696
1697 DEFINE_STRING_TABLE_LOOKUP(log_facility, int);
1698
1699 static const char *const log_level_table[] = {
1700         [LOG_EMERG] = "emerg",
1701         [LOG_ALERT] = "alert",
1702         [LOG_CRIT] = "crit",
1703         [LOG_ERR] = "err",
1704         [LOG_WARNING] = "warning",
1705         [LOG_NOTICE] = "notice",
1706         [LOG_INFO] = "info",
1707         [LOG_DEBUG] = "debug"
1708 };
1709
1710 DEFINE_STRING_TABLE_LOOKUP(log_level, int);
1711
1712 static const char* const sched_policy_table[] = {
1713         [SCHED_OTHER] = "other",
1714         [SCHED_BATCH] = "batch",
1715         [SCHED_IDLE] = "idle",
1716         [SCHED_FIFO] = "fifo",
1717         [SCHED_RR] = "rr"
1718 };
1719
1720 DEFINE_STRING_TABLE_LOOKUP(sched_policy, int);
1721
1722 static const char* const rlimit_table[] = {
1723         [RLIMIT_CPU] = "LimitCPU",
1724         [RLIMIT_FSIZE] = "LimitFSIZE",
1725         [RLIMIT_DATA] = "LimitDATA",
1726         [RLIMIT_STACK] = "LimitSTACK",
1727         [RLIMIT_CORE] = "LimitCORE",
1728         [RLIMIT_RSS] = "LimitRSS",
1729         [RLIMIT_NOFILE] = "LimitNOFILE",
1730         [RLIMIT_AS] = "LimitAS",
1731         [RLIMIT_NPROC] = "LimitNPROC",
1732         [RLIMIT_MEMLOCK] = "LimitMEMLOCK",
1733         [RLIMIT_LOCKS] = "LimitLOCKS",
1734         [RLIMIT_SIGPENDING] = "LimitSIGPENDING",
1735         [RLIMIT_MSGQUEUE] = "LimitMSGQUEUE",
1736         [RLIMIT_NICE] = "LimitNICE",
1737         [RLIMIT_RTPRIO] = "LimitRTPRIO",
1738         [RLIMIT_RTTIME] = "LimitRTTIME"
1739 };
1740
1741 DEFINE_STRING_TABLE_LOOKUP(rlimit, int);