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#include <err.h>
26#include <stdio.h>
27#include <string.h>
28#include <sys/types.h>
29#include <sys/stat.h>
30#include <sys/sysctl.h>
31#include <sys/user.h>
32#include <sys/param.h>
33#include <stdlib.h>
34#include <unistd.h>
35#include <stdarg.h>
36#include <stdint.h>
37#include <ctype.h>
38#include <errno.h>
39#include <pwd.h>
40#include <login_cap.h>
41#include <sys/time.h>
42#include <sys/resource.h>
43
44enum
45{
46    SH_NONE,
47    SH_SH,      /* sh */
48    SH_CSH,     /* csh */
49    SH_BASH,    /* gnu bash */
50    SH_TCSH,    /* tcsh */
51    SH_KSH,     /* (pd)ksh */
52    SH_ZSH,     /* zsh */
53    SH_RC,      /* rc or es */
54    SH_NUMBER
55};
56
57
58/* eval emitter for popular shells.
59 * Why aren't there any standards here? Most shells support either
60 * the csh 'limit' or sh 'ulimit' command, but each varies just
61 * enough that they aren't very compatible from one to the other.
62 */
63static struct {
64    const char * name;	    /* Name of shell */
65    const char * inf;	    /* Name used for 'unlimited' resource */
66    const char * cmd;	    /* Intro text */
67    const char * hard;	    /* Hard limit text */
68    const char * soft;	    /* Soft limit text */
69    const char * both;	    /* Hard+Soft limit text */
70    struct {
71	const char * pfx;
72	const char * sfx;
73	int divisor;
74    } lprm[RLIM_NLIMITS];
75} shellparm[] =
76{
77    { "", "infinity", "Resource limits%s%s:\n", "-max", "-cur", "",
78      {
79	  { "  cputime%-4s          %8s", " secs\n",  1    },
80	  { "  filesize%-4s         %8s", " kB\n",    1024 },
81	  { "  datasize%-4s         %8s", " kB\n",    1024 },
82	  { "  stacksize%-4s        %8s", " kB\n",    1024 },
83	  { "  coredumpsize%-4s     %8s", " kB\n",    1024 },
84	  { "  memoryuse%-4s        %8s", " kB\n",    1024 },
85	  { "  memorylocked%-4s     %8s", " kB\n",    1024 },
86	  { "  maxprocesses%-4s     %8s", "\n",       1    },
87	  { "  openfiles%-4s        %8s", "\n",       1    },
88	  { "  sbsize%-4s           %8s", " bytes\n", 1    },
89	  { "  vmemoryuse%-4s       %8s", " kB\n",    1024 },
90	  { "  pseudo-terminals%-4s %8s", "\n",       1    },
91	  { "  swapuse%-4s          %8s", " kB\n",    1024 },
92	  { "  kqueues%-4s          %8s", "\n",       1    },
93	  { "  umtxp%-4s            %8s", "\n",       1    },
94      }
95    },
96    { "sh", "unlimited", "", " -H", " -S", "",
97      {
98	  { "ulimit%s -t %s", ";\n",  1    },
99	  { "ulimit%s -f %s", ";\n",  512  },
100	  { "ulimit%s -d %s", ";\n",  1024 },
101	  { "ulimit%s -s %s", ";\n",  1024 },
102	  { "ulimit%s -c %s", ";\n",  512  },
103	  { "ulimit%s -m %s", ";\n",  1024 },
104	  { "ulimit%s -l %s", ";\n",  1024 },
105	  { "ulimit%s -u %s", ";\n",  1    },
106	  { "ulimit%s -n %s", ";\n",  1    },
107	  { "ulimit%s -b %s", ";\n",  1    },
108	  { "ulimit%s -v %s", ";\n",  1024 },
109	  { "ulimit%s -p %s", ";\n",  1    },
110	  { "ulimit%s -w %s", ";\n",  1024 },
111	  { "ulimit%s -k %s", ";\n",  1    },
112	  { "ulimit%s -o %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	  { "limit%s umtxp %s",           ";\n",  1    },
132      }
133    },
134    { "bash|bash2", "unlimited", "", " -H", " -S", "",
135      {
136	  { "ulimit%s -t %s", ";\n",  1    },
137	  { "ulimit%s -f %s", ";\n",  1024 },
138	  { "ulimit%s -d %s", ";\n",  1024 },
139	  { "ulimit%s -s %s", ";\n",  1024 },
140	  { "ulimit%s -c %s", ";\n",  1024 },
141	  { "ulimit%s -m %s", ";\n",  1024 },
142	  { "ulimit%s -l %s", ";\n",  1024 },
143	  { "ulimit%s -u %s", ";\n",  1    },
144	  { "ulimit%s -n %s", ";\n",  1    },
145	  { "ulimit%s -b %s", ";\n",  1    },
146	  { "ulimit%s -v %s", ";\n",  1024 },
147	  { "ulimit%s -p %s", ";\n",  1    },
148	  { "ulimit%s -w %s", ";\n",  1024 }
149      }
150    },
151    { "tcsh", "unlimited", "", " -h", "", NULL,
152      {
153	  { "limit%s cputime %s",         ";\n",  1    },
154	  { "limit%s filesize %s",        ";\n",  1024 },
155	  { "limit%s datasize %s",        ";\n",  1024 },
156	  { "limit%s stacksize %s",       ";\n",  1024 },
157	  { "limit%s coredumpsize %s",    ";\n",  1024 },
158	  { "limit%s memoryuse %s",       ";\n",  1024 },
159	  { "limit%s memorylocked %s",    ";\n",  1024 },
160	  { "limit%s maxproc %s",         ";\n",  1    },
161	  { "limit%s descriptors %s",     ";\n",  1    },
162	  { "limit%s sbsize %s",          ";\n",  1    },
163	  { "limit%s vmemoryuse %s",      ";\n",  1024 },
164	  { "limit%s pseudoterminals %s", ";\n",  1    },
165	  { "limit%s swapsize %s",        ";\n",  1024 },
166	  { "limit%s kqueues %s",         ";\n",  1    },
167	  { "limit%s umtxp %s",           ";\n",  1    },
168      }
169    },
170    { "ksh|pdksh", "unlimited", "", " -H", " -S", "",
171      {
172	  { "ulimit%s -t %s", ";\n",  1    },
173	  { "ulimit%s -f %s", ";\n",  512  },
174	  { "ulimit%s -d %s", ";\n",  1024 },
175	  { "ulimit%s -s %s", ";\n",  1024 },
176	  { "ulimit%s -c %s", ";\n",  512  },
177	  { "ulimit%s -m %s", ";\n",  1024 },
178	  { "ulimit%s -l %s", ";\n",  1024 },
179	  { "ulimit%s -p %s", ";\n",  1    },
180	  { "ulimit%s -n %s", ";\n",  1    },
181	  { "ulimit%s -b %s", ";\n",  1    },
182	  { "ulimit%s -v %s", ";\n",  1024 },
183	  { "ulimit%s -p %s", ";\n",  1    },
184	  { "ulimit%s -w %s", ";\n",  1024 }
185      }
186    },
187    { "zsh", "unlimited", "", " -H", " -S", "",
188      {
189	  { "ulimit%s -t %s", ";\n",  1    },
190	  { "ulimit%s -f %s", ";\n",  512  },
191	  { "ulimit%s -d %s", ";\n",  1024 },
192	  { "ulimit%s -s %s", ";\n",  1024 },
193	  { "ulimit%s -c %s", ";\n",  512  },
194	  { "ulimit%s -m %s", ";\n",  1024 },
195	  { "ulimit%s -l %s", ";\n",  1024 },
196	  { "ulimit%s -u %s", ";\n",  1    },
197	  { "ulimit%s -n %s", ";\n",  1    },
198	  { "ulimit%s -b %s", ";\n",  1    },
199	  { "ulimit%s -v %s", ";\n",  1024 },
200	  { "ulimit%s -p %s", ";\n",  1    },
201	  { "ulimit%s -w %s", ";\n",  1024 }
202      }
203    },
204    { "rc|es", "unlimited", "", " -h", "", NULL,
205      {
206	  { "limit%s cputime %s",         ";\n",  1    },
207	  { "limit%s filesize %s",        ";\n",  1024 },
208	  { "limit%s datasize %s",        ";\n",  1024 },
209	  { "limit%s stacksize %s",       ";\n",  1024 },
210	  { "limit%s coredumpsize %s",    ";\n",  1024 },
211	  { "limit%s memoryuse %s",       ";\n",  1024 },
212	  { "limit%s lockedmemory %s",    ";\n",  1024 },
213	  { "limit%s processes %s",       ";\n",  1    },
214	  { "limit%s descriptors %s",     ";\n",  1    },
215	  { "limit%s sbsize %s",          ";\n",  1    },
216	  { "limit%s vmemoryuse %s",      ";\n",  1024 },
217	  { "limit%s pseudoterminals %s", ";\n",  1    },
218	  { "limit%s swapuse %s",         ";\n",  1024 }
219      }
220    },
221    { NULL, NULL, NULL, NULL, NULL, NULL,
222      { }
223    }
224};
225
226static struct {
227    const char * cap;
228    rlim_t (*func)(login_cap_t *, const char *, rlim_t, rlim_t);
229} resources[RLIM_NLIMITS] = {
230    { "cputime",	login_getcaptime },
231    { "filesize",	login_getcapsize },
232    { "datasize",	login_getcapsize },
233    { "stacksize",	login_getcapsize },
234    { "coredumpsize",	login_getcapsize },
235    { "memoryuse",	login_getcapsize },
236    { "memorylocked",	login_getcapsize },
237    { "maxproc",	login_getcapnum  },
238    { "openfiles",	login_getcapnum  },
239    { "sbsize",		login_getcapsize },
240    { "vmemoryuse",	login_getcapsize },
241    { "pseudoterminals",login_getcapnum  },
242    { "swapuse",	login_getcapsize },
243    { "kqueues",	login_getcapnum  },
244    { "umtxp",		login_getcapnum  },
245};
246
247/*
248 * One letter for each resource levels.
249 * NOTE: There is a dependency on the corresponding
250 * letter index being equal to the resource number.
251 * If sys/resource.h defines are changed, this needs
252 * to be modified accordingly!
253 */
254
255#define RCS_STRING  "tfdscmlunbvpwko"
256
257static rlim_t resource_num(int which, int ch, const char *str);
258static void usage(void) __dead2;
259static int getshelltype(void);
260static void print_limit(rlim_t limit, unsigned divisor, const char *inf,
261			const char *pfx, const char *sfx, const char *which);
262static void getrlimit_proc(pid_t pid, int resource, struct rlimit *rlp);
263static void setrlimit_proc(pid_t pid, int resource, const struct rlimit *rlp);
264extern char **environ;
265
266static const char rcs_string[] = RCS_STRING;
267
268int
269main(int argc, char *argv[])
270{
271    char *p, *cls = NULL;
272    char *cleanenv[1];
273    struct passwd * pwd = NULL;
274    int rcswhich, shelltype;
275    int i, num_limits = 0;
276    int ch, doeval = 0, doall = 0;
277    int rtrn, setproc;
278    login_cap_t * lc = NULL;
279    enum { ANY=0, SOFT=1, HARD=2, BOTH=3, DISPLAYONLY=4 } type = ANY;
280    enum { RCSUNKNOWN=0, RCSSET=1, RCSSEL=2 } todo = RCSUNKNOWN;
281    int which_limits[RLIM_NLIMITS];
282    rlim_t set_limits[RLIM_NLIMITS];
283    struct rlimit limits[RLIM_NLIMITS];
284    pid_t pid;
285
286    /* init resource tables */
287    for (i = 0; i < RLIM_NLIMITS; i++) {
288	which_limits[i] = 0; /* Don't set/display any */
289	set_limits[i] = RLIM_INFINITY;
290    }
291
292    pid = -1;
293    optarg = NULL;
294    while ((ch = getopt(argc, argv,
295      ":EeC:U:BSHP:ab:c:d:f:l:m:n:s:t:u:v:p:w:k:o:")) != -1) {
296	switch(ch) {
297	case 'a':
298	    doall = 1;
299	    break;
300	case 'E':
301	    environ = cleanenv;
302	    cleanenv[0] = NULL;
303	    break;
304	case 'e':
305	    doeval = 1;
306	    break;
307	case 'C':
308	    cls = optarg;
309	    break;
310	case 'U':
311	    if ((pwd = getpwnam(optarg)) == NULL) {
312		if (!isdigit(*optarg) ||
313		    (pwd = getpwuid(atoi(optarg))) == NULL) {
314		    warnx("invalid user `%s'", optarg);
315		    usage();
316		}
317	    }
318	    break;
319	case 'H':
320	    type = HARD;
321	    break;
322	case 'S':
323	    type = SOFT;
324	    break;
325	case 'B':
326	    type = SOFT|HARD;
327	    break;
328	case 'P':
329	    if (!isdigit(*optarg) || (pid = atoi(optarg)) < 0) {
330		warnx("invalid pid `%s'", optarg);
331		usage();
332	    }
333	    break;
334	default:
335	case ':': /* Without arg */
336	    if ((p = strchr(rcs_string, optopt)) != NULL) {
337		int rcswhich1 = p - rcs_string;
338		if (optarg && *optarg == '-') { /* 'arg' is actually a switch */
339		    --optind;		/* back one arg, and make arg NULL */
340		    optarg = NULL;
341		}
342		todo = optarg == NULL ? RCSSEL : RCSSET;
343		if (type == ANY)
344		    type = BOTH;
345		which_limits[rcswhich1] = optarg ? type : DISPLAYONLY;
346		set_limits[rcswhich1] = resource_num(rcswhich1, optopt, optarg);
347		num_limits++;
348		break;
349	    }
350	    /* FALLTHRU */
351	case '?':
352	    usage();
353	}
354	optarg = NULL;
355    }
356
357    if (pid != -1) {
358	if (cls != NULL) {
359	    warnx("-C cannot be used with -P option");
360	    usage();
361	}
362	if (pwd != NULL) {
363	    warnx("-U cannot be used with -P option");
364	    usage();
365	}
366    }
367
368    /* Get current resource values */
369    setproc = 0;
370    for (i = 0; i < RLIM_NLIMITS; i++) {
371	if (pid == -1) {
372	    getrlimit(i, &limits[i]);
373	} else if (doall || num_limits == 0) {
374	    getrlimit_proc(pid, i, &limits[i]);
375	} else if (which_limits[i] != 0) {
376	    getrlimit_proc(pid, i, &limits[i]);
377	    setproc = 1;
378	}
379    }
380
381    /* If user was specified, get class from that */
382    if (pwd != NULL)
383	lc = login_getpwclass(pwd);
384    else if (cls != NULL && *cls != '\0') {
385	lc = login_getclassbyname(cls, NULL);
386	if (lc == NULL || strcmp(cls, lc->lc_class) != 0)
387	    fprintf(stderr, "login class '%s' non-existent, using %s\n",
388		    cls, lc?lc->lc_class:"current settings");
389    }
390
391    /* If we have a login class, update resource table from that */
392    if (lc != NULL) {
393	for (rcswhich = 0; rcswhich < RLIM_NLIMITS; rcswhich++) {
394	    char str[40];
395	    rlim_t val;
396
397	    /* current value overridden by resourcename or resourcename-cur */
398	    sprintf(str, "%s-cur", resources[rcswhich].cap);
399	    val = resources[rcswhich].func(lc, resources[rcswhich].cap, limits[rcswhich].rlim_cur, limits[rcswhich].rlim_cur);
400	    limits[rcswhich].rlim_cur = resources[rcswhich].func(lc, str, val, val);
401	    /* maximum value overridden by resourcename or resourcename-max */
402	    sprintf(str, "%s-max", resources[rcswhich].cap);
403	    val = resources[rcswhich].func(lc, resources[rcswhich].cap, limits[rcswhich].rlim_max, limits[rcswhich].rlim_max);
404	    limits[rcswhich].rlim_max = resources[rcswhich].func(lc, str, val, val);
405	}
406    }
407
408    /* now, let's determine what we wish to do with all this */
409
410    argv += optind;
411
412    /* If we're setting limits or doing an eval (ie. we're not just
413     * displaying), then check that hard limits are not lower than
414     * soft limits, and force rasing the hard limit if we need to if
415     * we are raising the soft limit, or lower the soft limit if we
416     * are lowering the hard limit.
417     */
418    if ((*argv || doeval) && getuid() == 0) {
419
420	for (rcswhich = 0; rcswhich < RLIM_NLIMITS; rcswhich++) {
421	    if (limits[rcswhich].rlim_max != RLIM_INFINITY) {
422		if (limits[rcswhich].rlim_cur == RLIM_INFINITY) {
423		    limits[rcswhich].rlim_max = RLIM_INFINITY;
424		    which_limits[rcswhich] |= HARD;
425		} else if (limits[rcswhich].rlim_cur > limits[rcswhich].rlim_max) {
426		    if (which_limits[rcswhich] == SOFT) {
427			limits[rcswhich].rlim_max = limits[rcswhich].rlim_cur;
428			which_limits[rcswhich] |= HARD;
429		    }  else if (which_limits[rcswhich] == HARD) {
430			limits[rcswhich].rlim_cur = limits[rcswhich].rlim_max;
431			which_limits[rcswhich] |= SOFT;
432		    } else {
433			/* else.. if we're specifically setting both to
434			 * silly values, then let it error out.
435			 */
436		    }
437		}
438	    }
439	}
440    }
441
442    /* See if we've overridden anything specific on the command line */
443    if (num_limits && todo == RCSSET) {
444	for (rcswhich = 0; rcswhich < RLIM_NLIMITS; rcswhich++) {
445	    if (which_limits[rcswhich] & HARD)
446		limits[rcswhich].rlim_max = set_limits[rcswhich];
447	    if (which_limits[rcswhich] & SOFT)
448		limits[rcswhich].rlim_cur = set_limits[rcswhich];
449	}
450    }
451
452    /* If *argv is not NULL, then we are being asked to
453     * (perhaps) set environment variables and run a program
454     */
455    if (*argv) {
456	if (doeval) {
457	    warnx("-e cannot be used with `cmd' option");
458	    usage();
459	}
460	if (pid != -1) {
461	    warnx("-P cannot be used with `cmd' option");
462	    usage();
463	}
464
465	login_close(lc);
466
467	/* set leading environment variables, like eval(1) */
468	while (*argv && (p = strchr(*argv, '='))) {
469		*p = '\0';
470		rtrn = setenv(*argv++, p + 1, 1);
471		*p = '=';
472		if (rtrn == -1)
473			err(EXIT_FAILURE, "setenv %s", *argv);
474	}
475
476	/* Set limits */
477	for (rcswhich = 0; rcswhich < RLIM_NLIMITS; rcswhich++) {
478	    if (doall || num_limits == 0 || which_limits[rcswhich] != 0)
479		if (setrlimit(rcswhich, &limits[rcswhich]) == -1)
480		    err(1, "setrlimit %s", resources[rcswhich].cap);
481	}
482
483	if (*argv == NULL)
484	    usage();
485
486	execvp(*argv, argv);
487	err(1, "%s", *argv);
488    }
489
490    if (setproc) {
491	for (rcswhich = 0; rcswhich < RLIM_NLIMITS; rcswhich++) {
492	    if (which_limits[rcswhich] != 0)
493		setrlimit_proc(pid, rcswhich, &limits[rcswhich]);
494	}
495	exit(EXIT_SUCCESS);
496    }
497
498    shelltype = doeval ? getshelltype() : SH_NONE;
499
500    if (type == ANY) /* Default to soft limits */
501	type = SOFT;
502
503    /* Display limits */
504    printf(shellparm[shelltype].cmd,
505	   lc ? " for class " : " (current)",
506	   lc ? lc->lc_class : "");
507
508    for (rcswhich = 0; rcswhich < RLIM_NLIMITS; rcswhich++) {
509	if (doall || num_limits == 0 || which_limits[rcswhich] != 0) {
510	    if (which_limits[rcswhich] == ANY)
511		which_limits[rcswhich] = type;
512	    if (shellparm[shelltype].lprm[rcswhich].pfx) {
513		if (shellparm[shelltype].both && limits[rcswhich].rlim_cur == limits[rcswhich].rlim_max) {
514		    print_limit(limits[rcswhich].rlim_max,
515				shellparm[shelltype].lprm[rcswhich].divisor,
516				shellparm[shelltype].inf,
517				shellparm[shelltype].lprm[rcswhich].pfx,
518				shellparm[shelltype].lprm[rcswhich].sfx,
519				shellparm[shelltype].both);
520		} else {
521		    if (which_limits[rcswhich] & HARD) {
522			print_limit(limits[rcswhich].rlim_max,
523				    shellparm[shelltype].lprm[rcswhich].divisor,
524				    shellparm[shelltype].inf,
525				    shellparm[shelltype].lprm[rcswhich].pfx,
526				    shellparm[shelltype].lprm[rcswhich].sfx,
527				    shellparm[shelltype].hard);
528		    }
529		    if (which_limits[rcswhich] & SOFT) {
530			print_limit(limits[rcswhich].rlim_cur,
531				    shellparm[shelltype].lprm[rcswhich].divisor,
532				    shellparm[shelltype].inf,
533				    shellparm[shelltype].lprm[rcswhich].pfx,
534				    shellparm[shelltype].lprm[rcswhich].sfx,
535				    shellparm[shelltype].soft);
536		    }
537		}
538	    }
539	}
540    }
541
542    login_close(lc);
543    exit(EXIT_SUCCESS);
544}
545
546
547static void
548usage(void)
549{
550    (void)fprintf(stderr,
551	"usage: limits [-C class|-P pid|-U user] [-eaSHBE] "
552	"[-bcdfklmnostuvpw [val]] [[name=val ...] cmd]\n");
553    exit(EXIT_FAILURE);
554}
555
556static void
557print_limit(rlim_t limit, unsigned divisor, const char * inf, const char * pfx, const char * sfx, const char * which)
558{
559    char numbr[64];
560
561    if (limit == RLIM_INFINITY)
562	strlcpy(numbr, inf, sizeof(numbr));
563    else
564	sprintf(numbr, "%jd", (intmax_t)((limit + divisor/2) / divisor));
565    printf(pfx, which, numbr);
566    printf(sfx, which);
567
568}
569
570
571static rlim_t
572resource_num(int which, int ch, const char *str)
573{
574    rlim_t res = RLIM_INFINITY;
575
576    if (str != NULL &&
577	!(strcasecmp(str, "inf") == 0 ||
578	  strcasecmp(str, "infinity") == 0 ||
579	  strcasecmp(str, "unlimit") == 0 ||
580	  strcasecmp(str, "unlimited") == 0)) {
581	const char * s = str;
582	char *e;
583
584	switch (which) {
585	case RLIMIT_CPU:	/* time values */
586	    errno = 0;
587	    res = 0;
588	    while (*s) {
589		rlim_t tim = strtoq(s, &e, 0);
590		if (e == NULL || e == s || errno)
591		    break;
592		switch (*e++) {
593		case 0:		   	/* end of string */
594		    e--;
595		default:
596		case 's': case 'S':	/* seconds */
597		    break;
598		case 'm': case 'M':	/* minutes */
599		    tim *= 60L;
600		    break;
601		case 'h': case 'H':	/* hours */
602		    tim *= (60L * 60L);
603		    break;
604		case 'd': case 'D':	/* days */
605		    tim *= (60L * 60L * 24L);
606		    break;
607		case 'w': case 'W':	/* weeks */
608		    tim *= (60L * 60L * 24L * 7L);
609		    break;
610		case 'y': case 'Y':	/* Years */
611		    tim *= (60L * 60L * 24L * 365L);
612		}
613		s = e;
614		res += tim;
615	    }
616	    break;
617	case RLIMIT_FSIZE: /* Size values */
618	case RLIMIT_DATA:
619	case RLIMIT_STACK:
620	case RLIMIT_CORE:
621	case RLIMIT_RSS:
622	case RLIMIT_MEMLOCK:
623	case RLIMIT_SBSIZE:
624	case RLIMIT_VMEM:
625	case RLIMIT_SWAP:
626	    errno = 0;
627	    res = 0;
628	    while (*s) {
629		rlim_t mult, tim = strtoq(s, &e, 0);
630		if (e == NULL || e == s || errno)
631		    break;
632		switch (*e++) {
633		case 0:	/* end of string */
634		    e--;
635		default:
636		    mult = 1;
637		    break;
638		case 'b': case 'B':	/* 512-byte blocks */
639		    mult = 512;
640		    break;
641		case 'k': case 'K':	/* 1024-byte Kilobytes */
642		    mult = 1024;
643		    break;
644		case 'm': case 'M':	/* 1024-k kbytes */
645		    mult = 1024 * 1024;
646		    break;
647		case 'g': case 'G':	/* 1Gbyte */
648		    mult = 1024 * 1024 * 1024;
649		    break;
650		case 't': case 'T':	/* 1TBte */
651		    mult = 1024LL * 1024LL * 1024LL * 1024LL;
652		    break;
653		}
654		s = e;
655		res += (tim * mult);
656	    }
657	    break;
658	case RLIMIT_NPROC:
659	case RLIMIT_NOFILE:
660	case RLIMIT_NPTS:
661	case RLIMIT_KQUEUES:
662	case RLIMIT_UMTXP:
663	    res = strtoq(s, &e, 0);
664	    s = e;
665	    break;
666	}
667	if (*s) {
668	    warnx("invalid value -%c `%s'", ch, str);
669	    usage();
670	}
671    }
672    return res;
673}
674
675
676static int
677getshellbyname(const char * shell)
678{
679    int i;
680    const char * q;
681    const char * p = strrchr(shell, '/');
682
683    p = p ? p+1 : shell;
684    for (i = 0; (q = shellparm[i].name) != NULL; i++) {
685	while (*q) {
686	    int j = strcspn(q, "|");
687
688	    if (j == 0)
689		break;
690	    if (strncmp(p, q, j) == 0)
691		return i;
692	    if (*(q += j))
693		++q;
694	}
695    }
696    return SH_SH;
697}
698
699
700/*
701 * Determine the type of shell our parent process is
702 * This is quite tricky, not 100% reliable and probably
703 * not nearly as thorough as it should be. Basically, this
704 * is a "best guess" only, but hopefully will work in
705 * most cases.
706 */
707
708static int
709getshelltype(void)
710{
711    pid_t ppid = getppid();
712
713    if (ppid != 1) {
714	struct kinfo_proc kp;
715	struct stat st;
716	char path[MAXPATHLEN];
717	char * shell = getenv("SHELL");
718	int mib[4];
719	size_t len;
720
721	mib[0] = CTL_KERN;
722	mib[1] = KERN_PROC;
723	mib[3] = ppid;
724
725	if (shell != NULL && stat(shell, &st) != -1) {
726	    struct stat st1;
727
728	    mib[2] = KERN_PROC_PATHNAME;
729	    len = sizeof(path);
730	    if (sysctl(mib, 4, path, &len, NULL, 0) != -1) {
731		/* $SHELL is actual shell? */
732		if (stat(path, &st1) != -1 && memcmp(&st, &st1, sizeof st) == 0)
733		    return getshellbyname(shell);
734	    }
735	}
736	mib[2] = KERN_PROC_PID;
737	len = sizeof(kp);
738	if (sysctl(mib, 4, &kp, &len, NULL, 0) != -1)
739	    return getshellbyname(kp.ki_comm);
740    }
741    return SH_SH;
742}
743
744static void
745getrlimit_proc(pid_t pid, int resource, struct rlimit *rlp)
746{
747    int error;
748    int name[5];
749    size_t len;
750
751    name[0] = CTL_KERN;
752    name[1] = KERN_PROC;
753    name[2] = KERN_PROC_RLIMIT;
754    name[3] = pid;
755    name[4] = resource;
756    len = sizeof(*rlp);
757    error = sysctl(name, 5, rlp, &len, NULL, 0);
758    if (error == -1)
759	err(EXIT_FAILURE, "sysctl: kern.proc.rlimit: %d", pid);
760    if (len != sizeof(*rlp))
761	errx(EXIT_FAILURE, "sysctl() returns wrong size");
762}
763
764static void
765setrlimit_proc(pid_t pid, int resource, const struct rlimit *rlp)
766{
767    int error;
768    int name[5];
769
770    name[0] = CTL_KERN;
771    name[1] = KERN_PROC;
772    name[2] = KERN_PROC_RLIMIT;
773    name[3] = pid;
774    name[4] = resource;
775    error = sysctl(name, 5, NULL, 0, rlp, sizeof(*rlp));
776    if (error == -1)
777	err(EXIT_FAILURE, "sysctl: kern.proc.rlimit: %d", pid);
778}
779