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
44 enum
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 */
63 static 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
226 static 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
257 static rlim_t resource_num(int which, int ch, const char *str);
258 static void usage(void) __dead2;
259 static int getshelltype(void);
260 static void print_limit(rlim_t limit, unsigned divisor, const char *inf,
261 const char *pfx, const char *sfx, const char *which);
262 static void getrlimit_proc(pid_t pid, int resource, struct rlimit *rlp);
263 static void setrlimit_proc(pid_t pid, int resource, const struct rlimit *rlp);
264 extern char **environ;
265
266 static const char rcs_string[] = RCS_STRING;
267
268 int
main(int argc,char * argv[])269 main(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
547 static void
usage(void)548 usage(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
556 static void
print_limit(rlim_t limit,unsigned divisor,const char * inf,const char * pfx,const char * sfx,const char * which)557 print_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
571 static rlim_t
resource_num(int which,int ch,const char * str)572 resource_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
676 static int
getshellbyname(const char * shell)677 getshellbyname(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
708 static int
getshelltype(void)709 getshelltype(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
744 static void
getrlimit_proc(pid_t pid,int resource,struct rlimit * rlp)745 getrlimit_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
764 static void
setrlimit_proc(pid_t pid,int resource,const struct rlimit * rlp)765 setrlimit_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