2 * Copyright (c) 1991, 1993
3 * The Regents of the University of California. All rights reserved.
5 * This code is derived from software contributed to Berkeley by
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 4. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 static char sccsid[] = "@(#)miscbltin.c 8.4 (Berkeley) 5/4/95";
38 #include <sys/cdefs.h>
39 __FBSDID("$FreeBSD$");
42 * Miscellaneous builtins.
45 #include <sys/types.h>
48 #include <sys/resource.h>
67 int readcmd(int, char **);
68 int umaskcmd(int, char **);
69 int ulimitcmd(int, char **);
72 * The read builtin. The -r option causes backslashes to be treated like
73 * ordinary characters.
75 * This uses unbuffered input, which may be avoidable in some cases.
77 * Note that if IFS=' :' then read x y should work so that:
79 * ' a b ' x='a', y='b'
85 * ':b c:' x='', y='b c:'
89 readcmd(int argc __unused, char **argv __unused)
103 ptrdiff_t lastnonifs, lastnonifsws;
114 while ((i = nextopt("erp:t:")) != '\0') {
125 tv.tv_sec = strtol(shoptarg, &tvptr, 0);
126 if (tvptr == shoptarg)
127 error("timeout value");
139 error("timeout unit");
144 if (prompt && isatty(0)) {
148 if (*(ap = argptr) == NULL)
150 if ((ifs = bltinlookup("IFS", 1)) == NULL)
153 if (tv.tv_sec >= 0) {
155 * Wait for something to become available.
159 status = select(1, &ifds, NULL, NULL, &tv);
161 * If there's nothing ready, return an error.
165 return (128 + (sig != 0 ? sig : SIGALRM));
173 lastnonifs = lastnonifsws = -1;
175 nread = read(STDIN_FILENO, &c, 1);
177 if (errno == EINTR) {
184 warning("read error: %s", strerror(errno));
187 } else if (nread != 1) {
198 lastnonifs = lastnonifsws = p - stackblock();
203 if (!rflag && c == '\\') {
210 is_ifs = strchr(" \t\n", c) ? 1 : 2;
214 if (startword != 0) {
216 /* Ignore leading IFS whitespace */
221 if (is_ifs == 2 && startword == 1) {
222 /* Only one non-whitespace IFS per word */
225 lastnonifsws = p - stackblock();
233 /* append this character to the current variable */
236 /* Not just a spare terminator */
238 lastnonifs = lastnonifsws = p - stackblock();
243 /* end of variable... */
247 /* Last variable needs all IFS chars */
250 lastnonifsws = p - stackblock();
256 setvar(*ap, stackblock(), 0);
259 lastnonifs = lastnonifsws = -1;
264 * Remove trailing IFS chars: always remove whitespace, don't remove
265 * non-whitespace unless it was naked
268 lastnonifsws = lastnonifs;
269 stackblock()[lastnonifsws + 1] = '\0';
270 setvar(*ap, stackblock(), 0);
272 /* Set any remaining args to "" */
273 while (*++ap != NULL)
281 umaskcmd(int argc __unused, char **argv __unused)
286 int symbolic_mode = 0;
288 while ((i = nextopt("S")) != '\0') {
297 if ((ap = *argptr) == NULL) {
299 char u[4], g[4], o[4];
302 if ((mask & S_IRUSR) == 0)
304 if ((mask & S_IWUSR) == 0)
306 if ((mask & S_IXUSR) == 0)
311 if ((mask & S_IRGRP) == 0)
313 if ((mask & S_IWGRP) == 0)
315 if ((mask & S_IXGRP) == 0)
320 if ((mask & S_IROTH) == 0)
322 if ((mask & S_IWOTH) == 0)
324 if ((mask & S_IXOTH) == 0)
328 out1fmt("u=%s,g=%s,o=%s\n", u, g, o);
330 out1fmt("%.4o\n", mask);
336 if (*ap >= '8' || *ap < '0')
337 error("Illegal number: %s", *argptr);
338 mask = (mask << 3) + (*ap - '0');
339 } while (*++ap != '\0');
344 if ((set = setmode (ap)) == NULL)
345 error("Illegal number: %s", ap);
347 mask = getmode (set, ~mask & 0777);
359 * This code, originally by Doug Gwyn, Doug Kingston, Eric Gisin, and
360 * Michael Rendell was ripped from pdksh 5.0.8 and hacked for use with
361 * ash by J.T. Conklin.
370 int factor; /* multiply by to get rlim_{cur,max} values */
374 static const struct limits limits[] = {
376 { "cpu time", "seconds", RLIMIT_CPU, 1, 't' },
379 { "file size", "512-blocks", RLIMIT_FSIZE, 512, 'f' },
382 { "data seg size", "kbytes", RLIMIT_DATA, 1024, 'd' },
385 { "stack size", "kbytes", RLIMIT_STACK, 1024, 's' },
388 { "core file size", "512-blocks", RLIMIT_CORE, 512, 'c' },
391 { "max memory size", "kbytes", RLIMIT_RSS, 1024, 'm' },
393 #ifdef RLIMIT_MEMLOCK
394 { "locked memory", "kbytes", RLIMIT_MEMLOCK, 1024, 'l' },
397 { "max user processes", (char *)0, RLIMIT_NPROC, 1, 'u' },
400 { "open files", (char *)0, RLIMIT_NOFILE, 1, 'n' },
403 { "virtual mem size", "kbytes", RLIMIT_VMEM, 1024, 'v' },
406 { "swap limit", "kbytes", RLIMIT_SWAP, 1024, 'w' },
409 { "socket buffer size", "bytes", RLIMIT_SBSIZE, 1, 'b' },
412 { "pseudo-terminals", (char *)0, RLIMIT_NPTS, 1, 'p' },
414 #ifdef RLIMIT_KQUEUES
415 { "kqueues", (char *)0, RLIMIT_KQUEUES, 1, 'k' },
418 { "umtx shared locks", (char *)0, RLIMIT_UMTXP, 1, 'o' },
420 { (char *) 0, (char *)0, 0, 0, '\0' }
423 enum limithow { SOFT = 0x1, HARD = 0x2 };
426 printlimit(enum limithow how, const struct rlimit *limit,
427 const struct limits *l)
432 val = limit->rlim_cur;
434 val = limit->rlim_max;
435 if (val == RLIM_INFINITY)
436 out1str("unlimited\n");
440 out1fmt("%jd\n", (intmax_t)val);
445 ulimitcmd(int argc __unused, char **argv __unused)
448 enum limithow how = SOFT | HARD;
449 const struct limits *l;
455 while ((optc = nextopt("HSatfdsmcnuvlbpwko")) != '\0')
470 for (l = limits; l->name && l->option != what; l++)
473 error("internal error (%c)", what);
475 set = *argptr ? 1 : 0;
479 if (all || argptr[1])
480 error("too many arguments");
481 if (strcmp(p, "unlimited") == 0)
487 if (*p < '0' || *p > '9')
490 uval = strtoumax(p, &end, 10);
491 if (errno != 0 || *end != '\0')
493 if (uval > UINTMAX_MAX / l->factor)
497 if (val < 0 || (uintmax_t)val != uval ||
498 val == RLIM_INFINITY)
503 for (l = limits; l->name; l++) {
505 if (getrlimit(l->cmd, &limit) < 0)
506 error("can't get limit: %s", strerror(errno));
509 snprintf(optbuf, sizeof(optbuf),
510 "(%s, -%c) ", l->units, l->option);
512 snprintf(optbuf, sizeof(optbuf),
513 "(-%c) ", l->option);
514 out1fmt("%-18s %18s ", l->name, optbuf);
515 printlimit(how, &limit, l);
520 if (getrlimit(l->cmd, &limit) < 0)
521 error("can't get limit: %s", strerror(errno));
524 limit.rlim_cur = val;
526 limit.rlim_max = val;
527 if (setrlimit(l->cmd, &limit) < 0)
528 error("bad limit: %s", strerror(errno));
530 printlimit(how, &limit, l);