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
  24 #include <sys/cdefs.h>
  25 __FBSDID("$FreeBSD$");
  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/sysctl.h>
  33 #include <sys/user.h>
  34 #include <sys/param.h>
  35 #include <stdlib.h>
  36 #include <unistd.h>
  37 #include <stdarg.h>
  38 #include <stdint.h>
  39 #include <ctype.h>
  40 #include <errno.h>
  41 #include <pwd.h>
  42 #include <login_cap.h>
  43 #include <sys/time.h>
  44 #include <sys/resource.h>
  45
  46 enum
  47 {
  48     SH_NONE,
  49     SH_SH,      /* sh */
  50     SH_CSH,     /* csh */
  51     SH_BASH,    /* gnu bash */
  52     SH_TCSH,    /* tcsh */
  53     SH_KSH,     /* (pd)ksh */
  54     SH_ZSH,     /* zsh */
  55     SH_RC,      /* rc or es */
  56     SH_NUMBER
  57 };
  58
  59
  60 /* eval emitter for popular shells.
  61  * Why aren't there any standards here? Most shells support either
  62  * the csh 'limit' or sh 'ulimit' command, but each varies just
  63  * enough that they aren't very compatible from one to the other.
  64  */
  65 static struct {
  66     const char * name;      /* Name of shell */
  67     const char * inf;       /* Name used for 'unlimited' resource */
  68     const char * cmd;       /* Intro text */
  69     const char * hard;      /* Hard limit text */
  70     const char * soft;      /* Soft limit text */
  71     const char * both;      /* Hard+Soft limit text */
  72     struct {
  73         const char * pfx;
  74         const char * sfx;
  75         int divisor;
  76     } lprm[RLIM_NLIMITS];
  77 } shellparm[] =
  78 {
  79     { "", "infinity", "Resource limits%s%s:\n", "-max", "-cur", "",
  80       {
  81           { "  cputime%-4s          %8s", " secs\n",  1    },
  82           { "  filesize%-4s         %8s", " kB\n",    1024 },
  83           { "  datasize%-4s         %8s", " kB\n",    1024 },
  84           { "  stacksize%-4s        %8s", " kB\n",    1024 },
  85           { "  coredumpsize%-4s     %8s", " kB\n",    1024 },
  86           { "  memoryuse%-4s        %8s", " kB\n",    1024 },
  87           { "  memorylocked%-4s     %8s", " kB\n",    1024 },
  88           { "  maxprocesses%-4s     %8s", "\n",       1    },
  89           { "  openfiles%-4s        %8s", "\n",       1    },
  90           { "  sbsize%-4s           %8s", " bytes\n", 1    },
  91           { "  vmemoryuse%-4s       %8s", " kB\n",    1024 },
  92           { "  pseudo-terminals%-4s %8s", "\n",       1    },
  93           { "  swapuse%-4s          %8s", " kB\n",    1024 },
  94           { "  kqueues%-4s          %8s", "\n",       1    },
  95       }
  96     },
  97     { "sh", "unlimited", "", " -H", " -S", "",
  98       {
  99           { "ulimit%s -t %s", ";\n",  1    },
 100           { "ulimit%s -f %s", ";\n",  512  },
 101           { "ulimit%s -d %s", ";\n",  1024 },
 102           { "ulimit%s -s %s", ";\n",  1024 },
 103           { "ulimit%s -c %s", ";\n",  512  },
 104           { "ulimit%s -m %s", ";\n",  1024 },
 105           { "ulimit%s -l %s", ";\n",  1024 },
 106           { "ulimit%s -u %s", ";\n",  1    },
 107           { "ulimit%s -n %s", ";\n",  1    },
 108           { "ulimit%s -b %s", ";\n",  1    },
 109           { "ulimit%s -v %s", ";\n",  1024 },
 110           { "ulimit%s -p %s", ";\n",  1    },
 111           { "ulimit%s -w %s", ";\n",  1024 },
 112           { "ulimit%s -k %s", ";\n",  1    },
 113       }
 114     },
 115     { "csh", "unlimited", "", " -h", "", NULL,
 116       {
 117           { "limit%s cputime %s",         ";\n",  1    },
 118           { "limit%s filesize %s",        ";\n",  1024 },
 119           { "limit%s datasize %s",        ";\n",  1024 },
 120           { "limit%s stacksize %s",       ";\n",  1024 },
 121           { "limit%s coredumpsize %s",    ";\n",  1024 },
 122           { "limit%s memoryuse %s",       ";\n",  1024 },
 123           { "limit%s memorylocked %s",    ";\n",  1024 },
 124           { "limit%s maxproc %s",         ";\n",  1    },
 125           { "limit%s openfiles %s",       ";\n",  1    },
 126           { "limit%s sbsize %s",          ";\n",  1    },
 127           { "limit%s vmemoryuse %s",      ";\n",  1024 },
 128           { "limit%s pseudoterminals %s", ";\n",  1    },
 129           { "limit%s swapsize %s",        ";\n",  1024 },
 130           { "limit%s kqueues %s",         ";\n",  1    },
 131       }
 132     },
 133     { "bash|bash2", "unlimited", "", " -H", " -S", "",
 134       {
 135           { "ulimit%s -t %s", ";\n",  1    },
 136           { "ulimit%s -f %s", ";\n",  1024 },
 137           { "ulimit%s -d %s", ";\n",  1024 },
 138           { "ulimit%s -s %s", ";\n",  1024 },
 139           { "ulimit%s -c %s", ";\n",  1024 },
 140           { "ulimit%s -m %s", ";\n",  1024 },
 141           { "ulimit%s -l %s", ";\n",  1024 },
 142           { "ulimit%s -u %s", ";\n",  1    },
 143           { "ulimit%s -n %s", ";\n",  1    },
 144           { "ulimit%s -b %s", ";\n",  1    },
 145           { "ulimit%s -v %s", ";\n",  1024 },
 146           { "ulimit%s -p %s", ";\n",  1    },
 147           { "ulimit%s -w %s", ";\n",  1024 }
 148       }
 149     },
 150     { "tcsh", "unlimited", "", " -h", "", NULL,
 151       {
 152           { "limit%s cputime %s",         ";\n",  1    },
 153           { "limit%s filesize %s",        ";\n",  1024 },
 154           { "limit%s datasize %s",        ";\n",  1024 },
 155           { "limit%s stacksize %s",       ";\n",  1024 },
 156           { "limit%s coredumpsize %s",    ";\n",  1024 },
 157           { "limit%s memoryuse %s",       ";\n",  1024 },
 158           { "limit%s memorylocked %s",    ";\n",  1024 },
 159           { "limit%s maxproc %s",         ";\n",  1    },
 160           { "limit%s descriptors %s",     ";\n",  1    },
 161           { "limit%s sbsize %s",          ";\n",  1    },
 162           { "limit%s vmemoryuse %s",      ";\n",  1024 },
 163           { "limit%s pseudoterminals %s", ";\n",  1    },
 164           { "limit%s swapsize %s",        ";\n",  1024 },
 165           { "limit%s kqueues %s",         ";\n",  1    },
 166       }
 167     },
 168     { "ksh|pdksh", "unlimited", "", " -H", " -S", "",
 169       {
 170           { "ulimit%s -t %s", ";\n",  1    },
 171           { "ulimit%s -f %s", ";\n",  512  },
 172           { "ulimit%s -d %s", ";\n",  1024 },
 173           { "ulimit%s -s %s", ";\n",  1024 },
 174           { "ulimit%s -c %s", ";\n",  512  },
 175           { "ulimit%s -m %s", ";\n",  1024 },
 176           { "ulimit%s -l %s", ";\n",  1024 },
 177           { "ulimit%s -p %s", ";\n",  1    },
 178           { "ulimit%s -n %s", ";\n",  1    },
 179           { "ulimit%s -b %s", ";\n",  1    },
 180           { "ulimit%s -v %s", ";\n",  1024 },
 181           { "ulimit%s -p %s", ";\n",  1    },
 182           { "ulimit%s -w %s", ";\n",  1024 }
 183       }
 184     },
 185     { "zsh", "unlimited", "", " -H", " -S", "",
 186       {
 187           { "ulimit%s -t %s", ";\n",  1    },
 188           { "ulimit%s -f %s", ";\n",  512  },
 189           { "ulimit%s -d %s", ";\n",  1024 },
 190           { "ulimit%s -s %s", ";\n",  1024 },
 191           { "ulimit%s -c %s", ";\n",  512  },
 192           { "ulimit%s -m %s", ";\n",  1024 },
 193           { "ulimit%s -l %s", ";\n",  1024 },
 194           { "ulimit%s -u %s", ";\n",  1    },
 195           { "ulimit%s -n %s", ";\n",  1    },
 196           { "ulimit%s -b %s", ";\n",  1    },
 197           { "ulimit%s -v %s", ";\n",  1024 },
 198           { "ulimit%s -p %s", ";\n",  1    },
 199           { "ulimit%s -w %s", ";\n",  1024 }
 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           { "limit%s pseudoterminals %s", ";\n",  1    },
 216           { "limit%s swapuse %s",         ";\n",  1024 }
 217       }
 218     },
 219     { NULL, NULL, NULL, NULL, NULL, NULL,
 220       { }
 221     }
 222 };
 223
 224 static struct {
 225     const char * cap;
 226     rlim_t (*func)(login_cap_t *, const char *, rlim_t, rlim_t);
 227 } resources[RLIM_NLIMITS] = {
 228     { "cputime",        login_getcaptime },
 229     { "filesize",       login_getcapsize },
 230     { "datasize",       login_getcapsize },
 231     { "stacksize",      login_getcapsize },
 232     { "coredumpsize",   login_getcapsize },
 233     { "memoryuse",      login_getcapsize },
 234     { "memorylocked",   login_getcapsize },
 235     { "maxproc",        login_getcapnum  },
 236     { "openfiles",      login_getcapnum  },
 237     { "sbsize",         login_getcapsize },
 238     { "vmemoryuse",     login_getcapsize },
 239     { "pseudoterminals",login_getcapnum  },
 240     { "swapuse",        login_getcapsize },
 241     { "kqueues",        login_getcapnum  },
 242 };
 243
 244 /*
 245  * One letter for each resource levels.
 246  * NOTE: There is a dependency on the corresponding
 247  * letter index being equal to the resource number.
 248  * If sys/resource.h defines are changed, this needs
 249  * to be modified accordingly!
 250  */
 251
 252 #define RCS_STRING  "tfdscmlunbvpwk"
 253
 254 static rlim_t resource_num(int which, int ch, const char *str);
 255 static void usage(void);
 256 static int getshelltype(void);
 257 static void print_limit(rlim_t limit, unsigned divisor, const char *inf,
 258                         const char *pfx, const char *sfx, const char *which);
 259 static void getrlimit_proc(pid_t pid, int resource, struct rlimit *rlp);
 260 static void setrlimit_proc(pid_t pid, int resource, const struct rlimit *rlp);
 261 extern char **environ;
 262
 263 static const char rcs_string[] = RCS_STRING;
 264
 265 int
 266 main(int argc, char *argv[])
 267 {
 268     char *p, *cls = NULL;
 269     char *cleanenv[1];
 270     struct passwd * pwd = NULL;
 271     int rcswhich, shelltype;
 272     int i, num_limits = 0;
 273     int ch, doeval = 0, doall = 0;
 274     int rtrn, setproc;
 275     login_cap_t * lc = NULL;
 276     enum { ANY=0, SOFT=1, HARD=2, BOTH=3, DISPLAYONLY=4 } type = ANY;
 277     enum { RCSUNKNOWN=0, RCSSET=1, RCSSEL=2 } todo = RCSUNKNOWN;
 278     int which_limits[RLIM_NLIMITS];
 279     rlim_t set_limits[RLIM_NLIMITS];
 280     struct rlimit limits[RLIM_NLIMITS];
 281     pid_t pid;
 282
 283     /* init resource tables */
 284     for (i = 0; i < RLIM_NLIMITS; i++) {
 285         which_limits[i] = 0; /* Don't set/display any */
 286         set_limits[i] = RLIM_INFINITY;
 287     }
 288
 289     pid = -1;
 290     optarg = NULL;
 291     while ((ch = getopt(argc, argv,
 292       ":EeC:U:BSHP:ab:c:d:f:l:m:n:s:t:u:v:p:w:k:")) != -1) {
 293         switch(ch) {
 294         case 'a':
 295             doall = 1;
 296             break;
 297         case 'E':
 298             environ = cleanenv;
 299             cleanenv[0] = NULL;
 300             break;
 301         case 'e':
 302             doeval = 1;
 303             break;
 304         case 'C':
 305             cls = optarg;
 306             break;
 307         case 'U':
 308             if ((pwd = getpwnam(optarg)) == NULL) {
 309                 if (!isdigit(*optarg) ||
 310                     (pwd = getpwuid(atoi(optarg))) == NULL) {
 311                     warnx("invalid user `%s'", optarg);
 312                     usage();
 313                 }
 314             }
 315             break;
 316         case 'H':
 317             type = HARD;
 318             break;
 319         case 'S':
 320             type = SOFT;
 321             break;
 322         case 'B':
 323             type = SOFT|HARD;
 324             break;
 325         case 'P':
 326             if (!isdigit(*optarg) || (pid = atoi(optarg)) < 0) {
 327                 warnx("invalid pid `%s'", optarg);
 328                 usage();
 329             }
 330             break;
 331         default:
 332         case ':': /* Without arg */
 333             if ((p = strchr(rcs_string, optopt)) != NULL) {
 334                 int rcswhich1 = p - rcs_string;
 335                 if (optarg && *optarg == '-') { /* 'arg' is actually a switch */
 336                     --optind;           /* back one arg, and make arg NULL */
 337                     optarg = NULL;
 338                 }
 339                 todo = optarg == NULL ? RCSSEL : RCSSET;
 340                 if (type == ANY)
 341                     type = BOTH;
 342                 which_limits[rcswhich1] = optarg ? type : DISPLAYONLY;
 343                 set_limits[rcswhich1] = resource_num(rcswhich1, optopt, optarg);
 344                 num_limits++;
 345                 break;
 346             }
 347             /* FALLTHRU */
 348         case '?':
 349             usage();
 350         }
 351         optarg = NULL;
 352     }
 353
 354     if (pid != -1) {
 355         if (cls != NULL) {
 356             warnx("-C cannot be used with -P option");
 357             usage();
 358         }
 359         if (pwd != NULL) {
 360             warnx("-U cannot be used with -P option");
 361             usage();
 362         }
 363     }
 364
 365     /* Get current resource values */
 366     setproc = 0;
 367     for (i = 0; i < RLIM_NLIMITS; i++) {
 368         if (pid == -1) {
 369             getrlimit(i, &limits[i]);
 370         } else if (doall || num_limits == 0) {
 371             getrlimit_proc(pid, i, &limits[i]);
 372         } else if (which_limits[i] != 0) {
 373             getrlimit_proc(pid, i, &limits[i]);
 374             setproc = 1;
 375         }
 376     }
 377
 378     /* If user was specified, get class from that */
 379     if (pwd != NULL)
 380         lc = login_getpwclass(pwd);
 381     else if (cls != NULL && *cls != '\0') {
 382         lc = login_getclassbyname(cls, NULL);
 383         if (lc == NULL || strcmp(cls, lc->lc_class) != 0)
 384             fprintf(stderr, "login class '%s' non-existent, using %s\n",
 385                     cls, lc?lc->lc_class:"current settings");
 386     }
 387
 388     /* If we have a login class, update resource table from that */
 389     if (lc != NULL) {
 390         for (rcswhich = 0; rcswhich < RLIM_NLIMITS; rcswhich++) {
 391             char str[40];
 392             rlim_t val;
 393
 394             /* current value overridden by resourcename or resourcename-cur */
 395             sprintf(str, "%s-cur", resources[rcswhich].cap);
 396             val = resources[rcswhich].func(lc, resources[rcswhich].cap, limits[rcswhich].rlim_cur, limits[rcswhich].rlim_cur);
 397             limits[rcswhich].rlim_cur = resources[rcswhich].func(lc, str, val, val);
 398             /* maximum value overridden by resourcename or resourcename-max */
 399             sprintf(str, "%s-max", resources[rcswhich].cap);
 400             val = resources[rcswhich].func(lc, resources[rcswhich].cap, limits[rcswhich].rlim_max, limits[rcswhich].rlim_max);
 401             limits[rcswhich].rlim_max = resources[rcswhich].func(lc, str, val, val);
 402         }
 403     }
 404
 405     /* now, let's determine what we wish to do with all this */
 406
 407     argv += optind;
 408
 409     /* If we're setting limits or doing an eval (ie. we're not just
 410      * displaying), then check that hard limits are not lower than
 411      * soft limits, and force rasing the hard limit if we need to if
 412      * we are raising the soft limit, or lower the soft limit if we
 413      * are lowering the hard limit.
 414      */
 415     if ((*argv || doeval) && getuid() == 0) {
 416
 417         for (rcswhich = 0; rcswhich < RLIM_NLIMITS; rcswhich++) {
 418             if (limits[rcswhich].rlim_max != RLIM_INFINITY) {
 419                 if (limits[rcswhich].rlim_cur == RLIM_INFINITY) {
 420                     limits[rcswhich].rlim_max = RLIM_INFINITY;
 421                     which_limits[rcswhich] |= HARD;
 422                 } else if (limits[rcswhich].rlim_cur > limits[rcswhich].rlim_max) {
 423                     if (which_limits[rcswhich] == SOFT) {
 424                         limits[rcswhich].rlim_max = limits[rcswhich].rlim_cur;
 425                         which_limits[rcswhich] |= HARD;
 426                     }  else if (which_limits[rcswhich] == HARD) {
 427                         limits[rcswhich].rlim_cur = limits[rcswhich].rlim_max;
 428                         which_limits[rcswhich] |= SOFT;
 429                     } else {
 430                         /* else.. if we're specifically setting both to
 431                          * silly values, then let it error out.
 432                          */
 433                     }
 434                 }
 435             }
 436         }
 437     }
 438
 439     /* See if we've overridden anything specific on the command line */
 440     if (num_limits && todo == RCSSET) {
 441         for (rcswhich = 0; rcswhich < RLIM_NLIMITS; rcswhich++) {
 442             if (which_limits[rcswhich] & HARD)
 443                 limits[rcswhich].rlim_max = set_limits[rcswhich];
 444             if (which_limits[rcswhich] & SOFT)
 445                 limits[rcswhich].rlim_cur = set_limits[rcswhich];
 446         }
 447     }
 448
 449     /* If *argv is not NULL, then we are being asked to
 450      * (perhaps) set environment variables and run a program
 451      */
 452     if (*argv) {
 453         if (doeval) {
 454             warnx("-e cannot be used with `cmd' option");
 455             usage();
 456         }
 457         if (pid != -1) {
 458             warnx("-P cannot be used with `cmd' option");
 459             usage();
 460         }
 461
 462         login_close(lc);
 463
 464         /* set leading environment variables, like eval(1) */
 465         while (*argv && (p = strchr(*argv, '='))) {
 466                 *p = '\0';
 467                 rtrn = setenv(*argv++, p + 1, 1);
 468                 *p = '=';
 469                 if (rtrn == -1)
 470                         err(EXIT_FAILURE, "setenv %s", *argv);
 471         }
 472
 473         /* Set limits */
 474         for (rcswhich = 0; rcswhich < RLIM_NLIMITS; rcswhich++) {
 475             if (doall || num_limits == 0 || which_limits[rcswhich] != 0)
 476                 if (setrlimit(rcswhich, &limits[rcswhich]) == -1)
 477                     err(1, "setrlimit %s", resources[rcswhich].cap);
 478         }
 479
 480         if (*argv == NULL)
 481             usage();
 482
 483         execvp(*argv, argv);
 484         err(1, "%s", *argv);
 485     }
 486
 487     if (setproc) {
 488         for (rcswhich = 0; rcswhich < RLIM_NLIMITS; rcswhich++) {
 489             if (which_limits[rcswhich] != 0)
 490                 setrlimit_proc(pid, rcswhich, &limits[rcswhich]);
 491         }
 492         exit(EXIT_SUCCESS);
 493     }
 494
 495     shelltype = doeval ? getshelltype() : SH_NONE;
 496
 497     if (type == ANY) /* Default to soft limits */
 498         type = SOFT;
 499
 500     /* Display limits */
 501     printf(shellparm[shelltype].cmd,
 502            lc ? " for class " : " (current)",
 503            lc ? lc->lc_class : "");
 504
 505     for (rcswhich = 0; rcswhich < RLIM_NLIMITS; rcswhich++) {
 506         if (doall || num_limits == 0 || which_limits[rcswhich] != 0) {
 507             if (which_limits[rcswhich] == ANY || which_limits[rcswhich])
 508                 which_limits[rcswhich] = type;
 509             if (shellparm[shelltype].lprm[rcswhich].pfx) {
 510                 if (shellparm[shelltype].both && limits[rcswhich].rlim_cur == limits[rcswhich].rlim_max) {
 511                     print_limit(limits[rcswhich].rlim_max,
 512                                 shellparm[shelltype].lprm[rcswhich].divisor,
 513                                 shellparm[shelltype].inf,
 514                                 shellparm[shelltype].lprm[rcswhich].pfx,
 515                                 shellparm[shelltype].lprm[rcswhich].sfx,
 516                                 shellparm[shelltype].both);
 517                 } else {
 518                     if (which_limits[rcswhich] & HARD) {
 519                         print_limit(limits[rcswhich].rlim_max,
 520                                     shellparm[shelltype].lprm[rcswhich].divisor,
 521                                     shellparm[shelltype].inf,
 522                                     shellparm[shelltype].lprm[rcswhich].pfx,
 523                                     shellparm[shelltype].lprm[rcswhich].sfx,
 524                                     shellparm[shelltype].hard);
 525                     }
 526                     if (which_limits[rcswhich] & SOFT) {
 527                         print_limit(limits[rcswhich].rlim_cur,
 528                                     shellparm[shelltype].lprm[rcswhich].divisor,
 529                                     shellparm[shelltype].inf,
 530                                     shellparm[shelltype].lprm[rcswhich].pfx,
 531                                     shellparm[shelltype].lprm[rcswhich].sfx,
 532                                     shellparm[shelltype].soft);
 533                     }
 534                 }
 535             }
 536         }
 537     }
 538
 539     login_close(lc);
 540     exit(EXIT_SUCCESS);
 541 }
 542
 543
 544 static void
 545 usage(void)
 546 {
 547     (void)fprintf(stderr,
 548         "usage: limits [-C class|-P pid|-U user] [-eaSHBE] "
 549         "[-bcdflmnstuvpwk [val]] [[name=val ...] cmd]\n");
 550     exit(EXIT_FAILURE);
 551 }
 552
 553 static void
 554 print_limit(rlim_t limit, unsigned divisor, const char * inf, const char * pfx, const char * sfx, const char * which)
 555 {
 556     char numbr[64];
 557
 558     if (limit == RLIM_INFINITY)
 559         strcpy(numbr, inf);
 560     else
 561         sprintf(numbr, "%jd", (intmax_t)((limit + divisor/2) / divisor));
 562     printf(pfx, which, numbr);
 563     printf(sfx, which);
 564
 565 }
 566
 567
 568 static rlim_t
 569 resource_num(int which, int ch, const char *str)
 570 {
 571     rlim_t res = RLIM_INFINITY;
 572
 573     if (str != NULL &&
 574         !(strcasecmp(str, "inf") == 0 ||
 575           strcasecmp(str, "infinity") == 0 ||
 576           strcasecmp(str, "unlimit") == 0 ||
 577           strcasecmp(str, "unlimited") == 0)) {
 578         const char * s = str;
 579         char *e;
 580
 581         switch (which) {
 582         case RLIMIT_CPU:        /* time values */
 583             errno = 0;
 584             res = 0;
 585             while (*s) {
 586                 rlim_t tim = strtoq(s, &e, 0);
 587                 if (e == NULL || e == s || errno)
 588                     break;
 589                 switch (*e++) {
 590                 case 0:                 /* end of string */
 591                     e--;
 592                 default:
 593                 case 's': case 'S':     /* seconds */
 594                     break;
 595                 case 'm': case 'M':     /* minutes */
 596                     tim *= 60L;
 597                     break;
 598                 case 'h': case 'H':     /* hours */
 599                     tim *= (60L * 60L);
 600                     break;
 601                 case 'd': case 'D':     /* days */
 602                     tim *= (60L * 60L * 24L);
 603                     break;
 604                 case 'w': case 'W':     /* weeks */
 605                     tim *= (60L * 60L * 24L * 7L);
 606                 case 'y': case 'Y':     /* Years */
 607                     tim *= (60L * 60L * 24L * 365L);
 608                 }
 609                 s = e;
 610                 res += tim;
 611             }
 612             break;
 613         case RLIMIT_FSIZE: /* Size values */
 614         case RLIMIT_DATA:
 615         case RLIMIT_STACK:
 616         case RLIMIT_CORE:
 617         case RLIMIT_RSS:
 618         case RLIMIT_MEMLOCK:
 619         case RLIMIT_SBSIZE:
 620         case RLIMIT_VMEM:
 621         case RLIMIT_SWAP:
 622             errno = 0;
 623             res = 0;
 624             while (*s) {
 625                 rlim_t mult, tim = strtoq(s, &e, 0);
 626                 if (e == NULL || e == s || errno)
 627                     break;
 628                 switch (*e++) {
 629                 case 0: /* end of string */
 630                     e--;
 631                 default:
 632                     mult = 1;
 633                     break;
 634                 case 'b': case 'B':     /* 512-byte blocks */
 635                     mult = 512;
 636                     break;
 637                 case 'k': case 'K':     /* 1024-byte Kilobytes */
 638                     mult = 1024;
 639                     break;
 640                 case 'm': case 'M':     /* 1024-k kbytes */
 641                     mult = 1024 * 1024;
 642                     break;
 643                 case 'g': case 'G':     /* 1Gbyte */
 644                     mult = 1024 * 1024 * 1024;
 645                     break;
 646                 case 't': case 'T':     /* 1TBte */
 647                     mult = 1024LL * 1024LL * 1024LL * 1024LL;
 648                     break;
 649                 }
 650                 s = e;
 651                 res += (tim * mult);
 652             }
 653             break;
 654         case RLIMIT_NPROC:
 655         case RLIMIT_NOFILE:
 656         case RLIMIT_NPTS:
 657         case RLIMIT_KQUEUES:
 658             res = strtoq(s, &e, 0);
 659             s = e;
 660             break;
 661         }
 662         if (*s) {
 663             warnx("invalid value -%c `%s'", ch, str);
 664             usage();
 665         }
 666     }
 667     return res;
 668 }
 669
 670
 671 static int
 672 getshellbyname(const char * shell)
 673 {
 674     int i;
 675     const char * q;
 676     const char * p = strrchr(shell, '/');
 677
 678     p = p ? p+1 : shell;
 679     for (i = 0; (q = shellparm[i].name) != NULL; i++) {
 680         while (*q) {
 681             int j = strcspn(q, "|");
 682
 683             if (j == 0)
 684                 break;
 685             if (strncmp(p, q, j) == 0)
 686                 return i;
 687             if (*(q += j))
 688                 ++q;
 689         }
 690     }
 691     return SH_SH;
 692 }
 693
 694
 695 /*
 696  * Determine the type of shell our parent process is
 697  * This is quite tricky, not 100% reliable and probably
 698  * not nearly as thorough as it should be. Basically, this
 699  * is a "best guess" only, but hopefully will work in
 700  * most cases.
 701  */
 702
 703 static int
 704 getshelltype(void)
 705 {
 706     pid_t ppid = getppid();
 707
 708     if (ppid != 1) {
 709         struct kinfo_proc kp;
 710         struct stat st;
 711         char path[MAXPATHLEN];
 712         char * shell = getenv("SHELL");
 713         int mib[4];
 714         size_t len;
 715
 716         mib[0] = CTL_KERN;
 717         mib[1] = KERN_PROC;
 718         mib[3] = ppid;
 719
 720         if (shell != NULL && stat(shell, &st) != -1) {
 721             struct stat st1;
 722
 723             mib[2] = KERN_PROC_PATHNAME;
 724             len = sizeof(path);
 725             if (sysctl(mib, 4, path, &len, NULL, 0) != -1) {
 726                 /* $SHELL is actual shell? */
 727                 if (stat(path, &st1) != -1 && memcmp(&st, &st1, sizeof st) == 0)
 728                     return getshellbyname(shell);
 729             }
 730         }
 731         mib[2] = KERN_PROC_PID;
 732         len = sizeof(kp);
 733         if (sysctl(mib, 4, &kp, &len, NULL, 0) != -1)
 734             return getshellbyname(kp.ki_comm);
 735     }
 736     return SH_SH;
 737 }
 738
 739 static void
 740 getrlimit_proc(pid_t pid, int resource, struct rlimit *rlp)
 741 {
 742     int error;
 743     int name[5];
 744     size_t len;
 745
 746     name[0] = CTL_KERN;
 747     name[1] = KERN_PROC;
 748     name[2] = KERN_PROC_RLIMIT;
 749     name[3] = pid;
 750     name[4] = resource;
 751     len = sizeof(*rlp);
 752     error = sysctl(name, 5, rlp, &len, NULL, 0);
 753     if (error == -1)
 754         err(EXIT_FAILURE, "sysctl: kern.proc.rlimit: %d", pid);
 755     if (len != sizeof(*rlp))
 756         errx(EXIT_FAILURE, "sysctl() returns wrong size");
 757 }
 758
 759 static void
 760 setrlimit_proc(pid_t pid, int resource, const struct rlimit *rlp)
 761 {
 762     int error;
 763     int name[5];
 764
 765     name[0] = CTL_KERN;
 766     name[1] = KERN_PROC;
 767     name[2] = KERN_PROC_RLIMIT;
 768     name[3] = pid;
 769     name[4] = resource;
 770     error = sysctl(name, 5, NULL, 0, rlp, sizeof(*rlp));
 771     if (error == -1)
 772         err(EXIT_FAILURE, "sysctl: kern.proc.rlimit: %d", pid);
 773 }