usr.bin/limits/limits.c

   1 /*-
   2  * Copyright (c) 1997 by
   3  * David L. Nugent <davidn@blaze.net.au>
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, is permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice immediately at the beginning of the file, without modification,
  11  *    this list of conditions, and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. This work was done expressly for inclusion into FreeBSD.  Other use
  16  *    is permitted provided this notation is included.
  17  * 4. Absolutely no warranty of function or purpose is made by the authors.
  18  * 5. Modifications may be freely made to this file providing the above
  19  *    conditions are met.
  20  *
  21  * Display/change(+runprogram)/eval resource limits.
  22  *
  23  * $FreeBSD: src/usr.bin/limits/limits.c,v 1.7.2.3 2003/05/22 09:26:57 sheldonh Exp $
  24  * $DragonFly: src/usr.bin/limits/limits.c,v 1.6 2006/03/06 03:10:51 swildner Exp $
  25  */
  26
  27 #include <err.h>
  28 #include <stdio.h>
  29 #include <string.h>
  30 #include <sys/types.h>
  31 #include <sys/stat.h>
  32 #include <sys/param.h>
  33 #include <stdlib.h>
  34 #include <unistd.h>
  35 #include <stdarg.h>
  36 #include <ctype.h>
  37 #include <errno.h>
  38 #include <pwd.h>
  39 #include <login_cap.h>
  40 #include <sys/time.h>
  41 #include <sys/resource.h>
  42
  43 enum
  44 {
  45     SH_NONE,
  46     SH_SH,      /* sh */
  47     SH_CSH,     /* csh */
  48     SH_BASH,    /* gnu bash */
  49     SH_TCSH,    /* tcsh */
  50     SH_KSH,     /* (pd)ksh */
  51     SH_ZSH,     /* zsh */
  52     SH_RC,      /* rc or es */
  53     SH_NUMBER
  54 };
  55
  56
  57 /* eval emitter for popular shells.
  58  * Why aren't there any standards here? Most shells support either
  59  * the csh 'limit' or sh 'ulimit' command, but each varies just
  60  * enough that they aren't very compatible from one to the other.
  61  */
  62 static struct {
  63     const char * name;      /* Name of shell */
  64     const char * inf;       /* Name used for 'unlimited' resource */
  65     const char * cmd;       /* Intro text */
  66     const char * hard;      /* Hard limit text */
  67     const char * soft;      /* Soft limit text */
  68     const char * both;      /* Hard+Soft limit text */
  69     struct {
  70         const char * pfx;
  71         const char * sfx;
  72         int divisor;
  73     } lprm[RLIM_NLIMITS];
  74 } shellparm[] =
  75 {
  76     { "", "infinity", "Resource limits%s%s:\n", "-max", "-cur", "",
  77       {
  78           { "  cputime%-4s      %8s", " secs\n",  1    },
  79           { "  filesize%-4s     %8s", " kb\n",    1024 },
  80           { "  datasize%-4s     %8s", " kb\n",    1024 },
  81           { "  stacksize%-4s    %8s", " kb\n",    1024 },
  82           { "  coredumpsize%-4s %8s", " kb\n",    1024 },
  83           { "  memoryuse%-4s    %8s", " kb\n",    1024 },
  84           { "  memorylocked%-4s %8s", " kb\n",    1024 },
  85           { "  maxprocesses%-4s %8s", "\n",       1    },
  86           { "  openfiles%-4s    %8s", "\n",       1    },
  87           { "  sbsize%-4s       %8s", " bytes\n", 1    },
  88           { "  vmemoryuse%-4s   %8s", " kb\n",    1024 },
  89 #ifdef RLIMIT_POSIXLOCKS
  90           { "  posixlocks%-4s   %8s", "\n",       1    },
  91 #endif
  92       }
  93     },
  94     { "sh", "unlimited", "", " -H", " -S", "",
  95       {
  96           { "ulimit%s -t %s", ";\n",  1    },
  97           { "ulimit%s -f %s", ";\n",  512  },
  98           { "ulimit%s -d %s", ";\n",  1024 },
  99           { "ulimit%s -s %s", ";\n",  1024 },
 100           { "ulimit%s -c %s", ";\n",  512  },
 101           { "ulimit%s -m %s", ";\n",  1024 },
 102           { "ulimit%s -l %s", ";\n",  1024 },
 103           { "ulimit%s -u %s", ";\n",  1    },
 104           { "ulimit%s -n %s", ";\n",  1    },
 105           { "ulimit%s -b %s", ";\n",  1    },
 106           { "ulimit%s -v %s", ";\n",  1024 },
 107 #ifdef RLIMIT_POSIXLOCKS
 108           { "ulimit%s -k %s", ";\n",  1    },
 109 #endif
 110       }
 111     },
 112     { "csh", "unlimited", "", " -h", "", NULL,
 113       {
 114           { "limit%s cputime %s",      ";\n",  1    },
 115           { "limit%s filesize %s",     ";\n",  1024 },
 116           { "limit%s datasize %s",     ";\n",  1024 },
 117           { "limit%s stacksize %s",    ";\n",  1024 },
 118           { "limit%s coredumpsize %s", ";\n",  1024 },
 119           { "limit%s memoryuse %s",    ";\n",  1024 },
 120           { "limit%s memorylocked %s", ";\n",  1024 },
 121           { "limit%s maxproc %s",      ";\n",  1    },
 122           { "limit%s openfiles %s",    ";\n",  1    },
 123           { "limit%s sbsize %s",       ";\n",  1    },
 124           { "limit%s vmemoryuse %s",   ";\n",  1024 },
 125 #ifdef RLIMIT_POSIXLOCKS
 126           { "limit%s advlocks %s",     ";\n",  1    },
 127 #endif
 128       }
 129     },
 130     { "bash|bash2", "unlimited", "", " -H", " -S", "",
 131       {
 132           { "ulimit%s -t %s", ";\n",  1    },
 133           { "ulimit%s -f %s", ";\n",  1024 },
 134           { "ulimit%s -d %s", ";\n",  1024 },
 135           { "ulimit%s -s %s", ";\n",  1024 },
 136           { "ulimit%s -c %s", ";\n",  1024 },
 137           { "ulimit%s -m %s", ";\n",  1024 },
 138           { "ulimit%s -l %s", ";\n",  1024 },
 139           { "ulimit%s -u %s", ";\n",  1    },
 140           { "ulimit%s -n %s", ";\n",  1    },
 141           { "ulimit%s -b %s", ";\n",  1    },
 142           { "ulimit%s -v %s", ";\n",  1024 },
 143 #ifdef RLIMIT_POSIXLOCKS
 144           { "ulimit%s -k %s", ";\n",  1    },
 145 #endif
 146       }
 147     },
 148     { "tcsh", "unlimited", "", " -h", "", NULL,
 149       {
 150           { "limit%s cputime %s",      ";\n",  1    },
 151           { "limit%s filesize %s",     ";\n",  1024 },
 152           { "limit%s datasize %s",     ";\n",  1024 },
 153           { "limit%s stacksize %s",    ";\n",  1024 },
 154           { "limit%s coredumpsize %s", ";\n",  1024 },
 155           { "limit%s memoryuse %s",    ";\n",  1024 },
 156           { "limit%s memorylocked %s", ";\n",  1024 },
 157           { "limit%s maxproc %s",      ";\n",  1    },
 158           { "limit%s descriptors %s",  ";\n",  1    },
 159           { "limit%s sbsize %s",       ";\n",  1    },
 160           { "limit%s vmemoryuse %s",   ";\n",  1024 },
 161 #ifdef RLIMIT_POSIXLOCKS
 162           { "limit%s advlocks %s",      ";\n",  1   },
 163 #endif
 164       }
 165     },
 166     { "ksh|pdksh", "unlimited", "", " -H", " -S", "",
 167       {
 168           { "ulimit%s -t %s", ";\n",  1    },
 169           { "ulimit%s -f %s", ";\n",  512  },
 170           { "ulimit%s -d %s", ";\n",  1024 },
 171           { "ulimit%s -s %s", ";\n",  1024 },
 172           { "ulimit%s -c %s", ";\n",  512  },
 173           { "ulimit%s -m %s", ";\n",  1024 },
 174           { "ulimit%s -l %s", ";\n",  1024 },
 175           { "ulimit%s -p %s", ";\n",  1    },
 176           { "ulimit%s -n %s", ";\n",  1    },
 177           { "ulimit%s -b %s", ";\n",  1    },
 178           { "ulimit%s -v %s", ";\n",  1024 },
 179 #ifdef RLIMIT_POSIXLOCKS
 180           { "ulimit%s -k %s", ";\n",  1    },
 181 #endif
 182       }
 183     },
 184     { "zsh", "unlimited", "", " -H", " -S", "",
 185       {
 186           { "ulimit%s -t %s", ";\n",  1    },
 187           { "ulimit%s -f %s", ";\n",  512  },
 188           { "ulimit%s -d %s", ";\n",  1024 },
 189           { "ulimit%s -s %s", ";\n",  1024 },
 190           { "ulimit%s -c %s", ";\n",  512  },
 191           { "ulimit%s -m %s", ";\n",  1024 },
 192           { "ulimit%s -l %s", ";\n",  1024 },
 193           { "ulimit%s -u %s", ";\n",  1    },
 194           { "ulimit%s -n %s", ";\n",  1    },
 195           { "ulimit%s -b %s", ";\n",  1    },
 196           { "ulimit%s -v %s", ";\n",  1024 },
 197 #ifdef RLIMIT_POSIXLOCKS
 198           { "ulimit%s -k %s", ";\n",  1    },
 199 #endif
 200       }
 201     },
 202     { "rc|es", "unlimited", "", " -h", "", NULL,
 203       {
 204           { "limit%s cputime %s",      ";\n",  1    },
 205           { "limit%s filesize %s",     ";\n",  1024 },
 206           { "limit%s datasize %s",     ";\n",  1024 },
 207           { "limit%s stacksize %s",    ";\n",  1024 },
 208           { "limit%s coredumpsize %s", ";\n",  1024 },
 209           { "limit%s memoryuse %s",    ";\n",  1024 },
 210           { "limit%s lockedmemory %s", ";\n",  1024 },
 211           { "limit%s processes %s",    ";\n",  1    },
 212           { "limit%s descriptors %s",  ";\n",  1    },
 213           { "limit%s sbsize %s",       ";\n",  1    },
 214           { "limit%s vmemoryuse %s",   ";\n",  1024 },
 215 #ifdef RLIMIT_POSIXLOCKS
 216           { "limit%s advlocks %s",     ";\n",  1    },
 217 #endif
 218       }
 219     },
 220     { NULL, NULL, NULL, NULL, NULL, NULL, {} }
 221 };
 222
 223 static struct {
 224     const char * cap;
 225     rlim_t (*func)(login_cap_t *, const char *, rlim_t, rlim_t);
 226 } resources[RLIM_NLIMITS] = {
 227     { "cputime",        login_getcaptime },
 228     { "filesize",       login_getcapsize },
 229     { "datasize",       login_getcapsize },
 230     { "stacksize",      login_getcapsize },
 231     { "coredumpsize",   login_getcapsize },
 232     { "memoryuse",      login_getcapsize },
 233     { "memorylocked",   login_getcapsize },
 234     { "maxproc",        login_getcapnum  },
 235     { "openfiles",      login_getcapnum  },
 236     { "sbsize",         login_getcapsize },
 237     { "vmemoryuse",     login_getcapsize },
 238     { "posixlocks",     login_getcapnum  },
 239 };
 240
 241 /*
 242  * One letter for each resource levels.
 243  * NOTE: There is a dependancy on the corresponding
 244  * letter index being equal to the resource number.
 245  * If sys/resource.h defines are changed, this needs
 246  * to be modified accordingly!
 247  */
 248
 249 #define RCS_STRING  "tfdscmlunbvk"
 250
 251 static rlim_t resource_num(int which, int ch, const char *str);
 252 static void usage(void);
 253 static int getshelltype(void);
 254 static void print_limit(rlim_t limit, unsigned divisor, const char *inf,
 255                         const char *pfx, const char *sfx, const char *which);
 256 extern char **environ;
 257
 258 static const char rcs_string[] = RCS_STRING;
 259
 260 int
 261 main(int argc, char *argv[])
 262 {
 263     char *p, *cls = NULL;
 264     char *cleanenv[1];
 265     struct passwd * pwd = NULL;
 266     int rcswhich, shelltype;
 267     int i, num_limits = 0;
 268     int ch, doeval = 0, doall = 0;
 269     login_cap_t * lc = NULL;
 270     enum { ANY=0, SOFT=1, HARD=2, BOTH=3, DISPLAYONLY=4 } type = ANY;
 271     enum { RCSUNKNOWN=0, RCSSET=1, RCSSEL=2 } todo = RCSUNKNOWN;
 272     int which_limits[RLIM_NLIMITS];
 273     rlim_t set_limits[RLIM_NLIMITS];
 274     struct rlimit limits[RLIM_NLIMITS];
 275
 276     /* init resource tables */
 277     for (i = 0; i < RLIM_NLIMITS; i++) {
 278         which_limits[i] = 0; /* Don't set/display any */
 279         set_limits[i] = RLIM_INFINITY;
 280         /* Get current resource values */
 281         if (getrlimit(i, &limits[i]) < 0) {
 282                 limits[i].rlim_cur = -1;
 283                 limits[i].rlim_max = -1;
 284         }
 285     }
 286
 287     optarg = NULL;
 288     while ((ch = getopt(argc, argv, ":EeC:U:BSHabc:d:f:k:l:m:n:s:t:u:v:")) != -1) {
 289         switch(ch) {
 290         case 'a':
 291             doall = 1;
 292             break;
 293         case 'E':
 294             environ = cleanenv;
 295             cleanenv[0] = NULL;
 296             break;
 297         case 'e':
 298             doeval = 1;
 299             break;
 300         case 'C':
 301             cls = optarg;
 302             break;
 303         case 'U':
 304             if ((pwd = getpwnam(optarg)) == NULL) {
 305                 if (!isdigit(*optarg) ||
 306                     (pwd = getpwuid(atoi(optarg))) == NULL) {
 307                     warnx("invalid user `%s'", optarg);
 308                     usage();
 309                 }
 310             }
 311             break;
 312         case 'H':
 313             type = HARD;
 314             break;
 315         case 'S':
 316             type = SOFT;
 317             break;
 318         case 'B':
 319             type = SOFT|HARD;
 320             break;
 321         default:
 322         case ':': /* Without arg */
 323             if ((p = strchr(rcs_string, optopt)) != NULL) {
 324                 rcswhich = p - rcs_string;
 325
 326                 /*
 327                  * Backwards compatibility with earlier kernel which might
 328                  * support fewer resources.
 329                  */
 330                 if (rcswhich >= RLIM_NLIMITS) {
 331                     usage();
 332                     break;
 333                 }
 334                 if (optarg && *optarg == '-') { /* 'arg' is actually a switch */
 335                     --optind;           /* back one arg, and make arg NULL */
 336                     optarg = NULL;
 337                 }
 338                 todo = optarg == NULL ? RCSSEL : RCSSET;
 339                 if (type == ANY)
 340                     type = BOTH;
 341                 which_limits[rcswhich] = optarg ? type : DISPLAYONLY;
 342                 set_limits[rcswhich] = resource_num(rcswhich, optopt, optarg);
 343                 num_limits++;
 344                 break;
 345             }
 346             /* FALLTHRU */
 347         case '?':
 348             usage();
 349         }
 350         optarg = NULL;
 351     }
 352
 353     /* If user was specified, get class from that */
 354     if (pwd != NULL)
 355         lc = login_getpwclass(pwd);
 356     else if (cls != NULL && *cls != '\0') {
 357         lc = login_getclassbyname(cls, NULL);
 358         if (lc == NULL || strcmp(cls, lc->lc_class) != 0)
 359             fprintf(stderr, "login class '%s' non-existent, using %s\n",
 360                     cls, lc?lc->lc_class:"current settings");
 361     }
 362
 363     /* If we have a login class, update resource table from that */
 364     if (lc != NULL) {
 365         for (rcswhich = 0; rcswhich < RLIM_NLIMITS; rcswhich++) {
 366             char str[40];
 367             rlim_t val;
 368
 369             /* current value overridden by resourcename or resourcename-cur */
 370             sprintf(str, "%s-cur", resources[rcswhich].cap);
 371             val = resources[rcswhich].func(lc, resources[rcswhich].cap, limits[rcswhich].rlim_cur, limits[rcswhich].rlim_cur);
 372             limits[rcswhich].rlim_cur = resources[rcswhich].func(lc, str, val, val);
 373             /* maximum value overridden by resourcename or resourcename-max */
 374             sprintf(str, "%s-max", resources[rcswhich].cap);
 375             val = resources[rcswhich].func(lc, resources[rcswhich].cap, limits[rcswhich].rlim_max, limits[rcswhich].rlim_max);
 376             limits[rcswhich].rlim_max = resources[rcswhich].func(lc, str, val, val);
 377         }
 378     }
 379
 380     /* now, let's determine what we wish to do with all this */
 381
 382     argv += optind;
 383
 384     /* If we're setting limits or doing an eval (ie. we're not just
 385      * displaying), then check that hard limits are not lower than
 386      * soft limits, and force rasing the hard limit if we need to if
 387      * we are raising the soft limit, or lower the soft limit if we
 388      * are lowering the hard limit.
 389      */
 390     if ((*argv || doeval) && getuid() == 0) {
 391
 392         for (rcswhich = 0; rcswhich < RLIM_NLIMITS; rcswhich++) {
 393             if (limits[rcswhich].rlim_max != RLIM_INFINITY) {
 394                 if (limits[rcswhich].rlim_cur == RLIM_INFINITY) {
 395                     limits[rcswhich].rlim_max = RLIM_INFINITY;
 396                     which_limits[rcswhich] |= HARD;
 397                 } else if (limits[rcswhich].rlim_cur > limits[rcswhich].rlim_max) {
 398                     if (which_limits[rcswhich] == SOFT) {
 399                         limits[rcswhich].rlim_max = limits[rcswhich].rlim_cur;
 400                         which_limits[rcswhich] |= HARD;
 401                     }  else if (which_limits[rcswhich] == HARD) {
 402                         limits[rcswhich].rlim_cur = limits[rcswhich].rlim_max;
 403                         which_limits[rcswhich] |= SOFT;
 404                     } else {
 405                         /* else.. if we're specifically setting both to
 406                          * silly values, then let it error out.
 407                          */
 408                     }
 409                 }
 410             }
 411         }
 412     }
 413
 414     /* See if we've overridden anything specific on the command line */
 415     if (num_limits && todo == RCSSET) {
 416         for (rcswhich = 0; rcswhich < RLIM_NLIMITS; rcswhich++) {
 417             if (which_limits[rcswhich] & HARD)
 418                 limits[rcswhich].rlim_max = set_limits[rcswhich];
 419             if (which_limits[rcswhich] & SOFT)
 420                 limits[rcswhich].rlim_cur = set_limits[rcswhich];
 421         }
 422     }
 423
 424     /* If *argv is not NULL, then we are being asked to
 425      * (perhaps) set environment variables and run a program
 426      */
 427     if (*argv) {
 428         if (doeval) {
 429             warnx("-e cannot be used with `cmd' option");
 430             usage();
 431         }
 432
 433         login_close(lc);
 434
 435         /* set leading environment variables, like eval(1) */
 436         while (*argv && (p = strchr(*argv, '='))) {
 437             *p = '\0';
 438             if (setenv(*argv++, p + 1, 1) == -1)
 439                 err(1, "setenv: cannot set %s=%s", *argv, p + 1);
 440             *p = '=';
 441         }
 442
 443         /* Set limits */
 444         for (rcswhich = 0; rcswhich < RLIM_NLIMITS; rcswhich++) {
 445             if (doall || num_limits == 0 || which_limits[rcswhich] != 0)
 446                 if (setrlimit(rcswhich, &limits[rcswhich]) == -1)
 447                     err(1, "setrlimit %s", resources[rcswhich].cap);
 448         }
 449
 450         if (*argv == NULL)
 451             usage();
 452
 453         execvp(*argv, argv);
 454         err(1, "%s", *argv);
 455     }
 456
 457     shelltype = doeval ? getshelltype() : SH_NONE;
 458
 459     if (type == ANY) /* Default to soft limits */
 460         type = SOFT;
 461
 462     /* Display limits */
 463     printf(shellparm[shelltype].cmd,
 464            lc ? " for class " : " (current)",
 465            lc ? lc->lc_class : "");
 466
 467     for (rcswhich = 0; rcswhich < RLIM_NLIMITS; rcswhich++) {
 468         if (doall || num_limits == 0 || which_limits[rcswhich] != 0) {
 469             if (which_limits[rcswhich] == ANY || which_limits[rcswhich])
 470                 which_limits[rcswhich] = type;
 471             if (shellparm[shelltype].lprm[rcswhich].pfx) {
 472                 if (shellparm[shelltype].both && limits[rcswhich].rlim_cur == limits[rcswhich].rlim_max) {
 473                     print_limit(limits[rcswhich].rlim_max,
 474                                 shellparm[shelltype].lprm[rcswhich].divisor,
 475                                 shellparm[shelltype].inf,
 476                                 shellparm[shelltype].lprm[rcswhich].pfx,
 477                                 shellparm[shelltype].lprm[rcswhich].sfx,
 478                                 shellparm[shelltype].both);
 479                 } else {
 480                     if (which_limits[rcswhich] & HARD) {
 481                         print_limit(limits[rcswhich].rlim_max,
 482                                     shellparm[shelltype].lprm[rcswhich].divisor,
 483                                     shellparm[shelltype].inf,
 484                                     shellparm[shelltype].lprm[rcswhich].pfx,
 485                                     shellparm[shelltype].lprm[rcswhich].sfx,
 486                                     shellparm[shelltype].hard);
 487                     }
 488                     if (which_limits[rcswhich] & SOFT) {
 489                         print_limit(limits[rcswhich].rlim_cur,
 490                                     shellparm[shelltype].lprm[rcswhich].divisor,
 491                                     shellparm[shelltype].inf,
 492                                     shellparm[shelltype].lprm[rcswhich].pfx,
 493                                     shellparm[shelltype].lprm[rcswhich].sfx,
 494                                     shellparm[shelltype].soft);
 495                     }
 496                 }
 497             }
 498         }
 499     }
 500
 501     login_close(lc);
 502     exit(EXIT_SUCCESS);
 503 }
 504
 505
 506 static void
 507 usage(void)
 508 {
 509     (void)fprintf(stderr,
 510 "usage: limits [-C class|-U user] [-eaSHBE] [-bcdflmnstuvk [val]] [[name=val ...] cmd]\n");
 511     exit(EXIT_FAILURE);
 512 }
 513
 514 static void
 515 print_limit(rlim_t limit, unsigned divisor, const char * inf, const char * pfx, const char * sfx, const char * which)
 516 {
 517     char numbr[64];
 518
 519     if (limit == RLIM_INFINITY)
 520         strcpy(numbr, inf);
 521     else
 522         sprintf(numbr, "%jd", (intmax_t)((limit + divisor/2) / divisor));
 523     printf(pfx, which, numbr);
 524     printf(sfx, which);
 525
 526 }
 527
 528
 529 static rlim_t
 530 resource_num(int which, int ch, const char *str)
 531 {
 532     rlim_t res = RLIM_INFINITY;
 533
 534     if (str != NULL &&
 535         !(strcasecmp(str, "inf") == 0 ||
 536           strcasecmp(str, "infinity") == 0 ||
 537           strcasecmp(str, "unlimit") == 0 ||
 538           strcasecmp(str, "unlimited") == 0)) {
 539         const char * s = str;
 540         char *e;
 541
 542         switch (which) {
 543         case RLIMIT_CPU:        /* time values */
 544             errno = 0;
 545             res = 0;
 546             while (*s) {
 547                 rlim_t tim = strtoq(s, &e, 0);
 548                 if (e == NULL || e == s || errno)
 549                     break;
 550                 switch (*e++) {
 551                 case 0:                 /* end of string */
 552                     e--;
 553                 default:
 554                 case 's': case 'S':     /* seconds */
 555                     break;
 556                 case 'm': case 'M':     /* minutes */
 557                     tim *= 60L;
 558                     break;
 559                 case 'h': case 'H':     /* hours */
 560                     tim *= (60L * 60L);
 561                     break;
 562                 case 'd': case 'D':     /* days */
 563                     tim *= (60L * 60L * 24L);
 564                     break;
 565                 case 'w': case 'W':     /* weeks */
 566                     tim *= (60L * 60L * 24L * 7L);
 567                 case 'y': case 'Y':     /* Years */
 568                     tim *= (60L * 60L * 24L * 365L);
 569                 }
 570                 s = e;
 571                 res += tim;
 572             }
 573             break;
 574         case RLIMIT_FSIZE: /* Size values */
 575         case RLIMIT_DATA:
 576         case RLIMIT_STACK:
 577         case RLIMIT_CORE:
 578         case RLIMIT_RSS:
 579         case RLIMIT_MEMLOCK:
 580         case RLIMIT_VMEM:
 581             errno = 0;
 582             res = 0;
 583             while (*s) {
 584                 rlim_t mult, tim = strtoq(s, &e, 0);
 585                 if (e == NULL || e == s || errno)
 586                     break;
 587                 switch (*e++) {
 588                 case 0: /* end of string */
 589                     e--;
 590                 default:
 591                     mult = 1;
 592                     break;
 593                 case 'b': case 'B':     /* 512-byte blocks */
 594                     mult = 512;
 595                     break;
 596                 case 'k': case 'K':     /* 1024-byte Kilobytes */
 597                     mult = 1024;
 598                     break;
 599                 case 'm': case 'M':     /* 1024-k kbytes */
 600                     mult = 1024 * 1024;
 601                     break;
 602                 case 'g': case 'G':     /* 1Gbyte */
 603                     mult = 1024 * 1024 * 1024;
 604                     break;
 605                 case 't': case 'T':     /* 1TBte */
 606                     mult = 1024LL * 1024LL * 1024LL * 1024LL;
 607                     break;
 608                 }
 609                 s = e;
 610                 res += (tim * mult);
 611             }
 612             break;
 613         case RLIMIT_NPROC:
 614         case RLIMIT_NOFILE:
 615             res = strtoq(s, &e, 0);
 616             s = e;
 617             break;
 618         }
 619         if (*s) {
 620             warnx("invalid value -%c `%s'", ch, str);
 621             usage();
 622         }
 623     }
 624     return res;
 625 }
 626
 627
 628 static int
 629 getshellbyname(const char * shell)
 630 {
 631     int i;
 632     const char * q;
 633     const char * p = strrchr(shell, '/');
 634
 635     p = p ? p + 1 : shell;
 636     for (i = 0; (q = shellparm[i].name) != NULL; i++) {
 637         while (*q) {
 638             int j = strcspn(q, "|");
 639
 640             if (j == 0)
 641                 break;
 642             if (strncmp(p, q, j) == 0)
 643                 return i;
 644             if (*(q += j))
 645                 ++q;
 646         }
 647     }
 648     return SH_SH;
 649 }
 650
 651
 652 /*
 653  * Determine the type of shell our parent process is
 654  * This is quite tricky, not 100% reliable and probably
 655  * not nearly as thorough as it should be. Basically, this
 656  * is a "best guess" only, but hopefully will work in
 657  * most cases.
 658  */
 659
 660 static int
 661 getshelltype(void)
 662 {
 663     pid_t ppid = getppid();
 664
 665     if (ppid != 1) {
 666         FILE * fp;
 667         struct stat st;
 668         char procdir[MAXPATHLEN], buf[128];
 669         int l = sprintf(procdir, "/proc/%ld/", (long)ppid);
 670         char * shell = getenv("SHELL");
 671
 672         if (shell != NULL && stat(shell, &st) != -1) {
 673             struct stat st1;
 674
 675             strcpy(procdir+l, "file");
 676             /* $SHELL is actual shell? */
 677             if (stat(procdir, &st1) != -1 && memcmp(&st, &st1, sizeof st) == 0)
 678                 return getshellbyname(shell);
 679         }
 680         strcpy(procdir+l, "status");
 681         if (stat(procdir, &st) == 0 && (fp = fopen(procdir, "r")) != NULL) {
 682             char * p = fgets(buf, sizeof buf, fp)==NULL ? NULL : strtok(buf, " \t");
 683             fclose(fp);
 684             if (p != NULL)
 685                 return getshellbyname(p);
 686         }
 687     }
 688     return SH_SH;
 689 }
 690