miscbltin.c revision 29983
11556Srgrimes/*- 21556Srgrimes * Copyright (c) 1991, 1993 31556Srgrimes * The Regents of the University of California. All rights reserved. 41556Srgrimes * 51556Srgrimes * This code is derived from software contributed to Berkeley by 61556Srgrimes * Kenneth Almquist. 71556Srgrimes * 81556Srgrimes * Redistribution and use in source and binary forms, with or without 91556Srgrimes * modification, are permitted provided that the following conditions 101556Srgrimes * are met: 111556Srgrimes * 1. Redistributions of source code must retain the above copyright 121556Srgrimes * notice, this list of conditions and the following disclaimer. 131556Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 141556Srgrimes * notice, this list of conditions and the following disclaimer in the 151556Srgrimes * documentation and/or other materials provided with the distribution. 161556Srgrimes * 3. All advertising materials mentioning features or use of this software 171556Srgrimes * must display the following acknowledgement: 181556Srgrimes * This product includes software developed by the University of 191556Srgrimes * California, Berkeley and its contributors. 201556Srgrimes * 4. Neither the name of the University nor the names of its contributors 211556Srgrimes * may be used to endorse or promote products derived from this software 221556Srgrimes * without specific prior written permission. 231556Srgrimes * 241556Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 251556Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 261556Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 271556Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 281556Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 291556Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 301556Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 311556Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 321556Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 331556Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 341556Srgrimes * SUCH DAMAGE. 353044Sdg * 3629983Smsmith * $Id: miscbltin.c,v 1.13 1997/05/19 00:18:43 steve Exp $ 371556Srgrimes */ 381556Srgrimes 391556Srgrimes#ifndef lint 4020425Sstevestatic char const sccsid[] = "@(#)miscbltin.c 8.4 (Berkeley) 5/4/95"; 411556Srgrimes#endif /* not lint */ 421556Srgrimes 431556Srgrimes/* 441556Srgrimes * Miscelaneous builtins. 451556Srgrimes */ 461556Srgrimes 4717987Speter#include <sys/types.h> 4817987Speter#include <sys/stat.h> 4917987Speter#include <sys/time.h> 5017987Speter#include <sys/resource.h> 5117987Speter#include <unistd.h> 5217987Speter#include <ctype.h> 5318016Speter#include <errno.h> 5418018Speter#include <stdio.h> 5529983Smsmith#include <termios.h> 5617987Speter 571556Srgrimes#include "shell.h" 581556Srgrimes#include "options.h" 591556Srgrimes#include "var.h" 601556Srgrimes#include "output.h" 611556Srgrimes#include "memalloc.h" 621556Srgrimes#include "error.h" 631556Srgrimes#include "mystring.h" 641556Srgrimes 651556Srgrimes#undef eflag 661556Srgrimes 671556Srgrimesextern char **argptr; /* argument list for builtin command */ 681556Srgrimes 691556Srgrimes 701556Srgrimes/* 711556Srgrimes * The read builtin. The -e option causes backslashes to escape the 721556Srgrimes * following character. 731556Srgrimes * 741556Srgrimes * This uses unbuffered input, which may be avoidable in some cases. 751556Srgrimes */ 761556Srgrimes 7717987Speterint 7817987Speterreadcmd(argc, argv) 7925905Ssteve int argc __unused; 8025905Ssteve char **argv __unused; 8117987Speter{ 821556Srgrimes char **ap; 831556Srgrimes int backslash; 841556Srgrimes char c; 851556Srgrimes int eflag; 861556Srgrimes char *prompt; 871556Srgrimes char *ifs; 881556Srgrimes char *p; 891556Srgrimes int startword; 901556Srgrimes int status; 911556Srgrimes int i; 9229983Smsmith struct timeval tv; 9329983Smsmith char *tvptr; 9429983Smsmith fd_set ifds; 9529983Smsmith struct termios told, tnew; 9629983Smsmith int tsaved; 971556Srgrimes 981556Srgrimes eflag = 0; 991556Srgrimes prompt = NULL; 10029983Smsmith tv.tv_sec = -1; 10129983Smsmith tv.tv_usec = 0; 10229983Smsmith while ((i = nextopt("ep:t:")) != '\0') { 10329983Smsmith switch(i) { 10429983Smsmith case 'p': 1051556Srgrimes prompt = optarg; 10629983Smsmith break; 10729983Smsmith case 'e': 1081556Srgrimes eflag = 1; 10929983Smsmith break; 11029983Smsmith case 't': 11129983Smsmith tv.tv_sec = strtol(optarg, &tvptr, 0); 11229983Smsmith if (tvptr == optarg) 11329983Smsmith error("timeout value"); 11429983Smsmith switch(*tvptr) { 11529983Smsmith case 0: 11629983Smsmith case 's': 11729983Smsmith break; 11829983Smsmith case 'h': 11929983Smsmith tv.tv_sec *= 60; 12029983Smsmith /* FALLTHROUGH */ 12129983Smsmith case 'm': 12229983Smsmith tv.tv_sec *= 60; 12329983Smsmith break; 12429983Smsmith default: 12529983Smsmith error("timeout unit"); 12629983Smsmith } 12729983Smsmith break; 12829983Smsmith } 1291556Srgrimes } 1301556Srgrimes if (prompt && isatty(0)) { 1311556Srgrimes out2str(prompt); 1321556Srgrimes flushall(); 1331556Srgrimes } 1341556Srgrimes if (*(ap = argptr) == NULL) 1351556Srgrimes error("arg count"); 1361556Srgrimes if ((ifs = bltinlookup("IFS", 1)) == NULL) 1371556Srgrimes ifs = nullstr; 13829983Smsmith 13929983Smsmith if (tv.tv_sec >= 0) { 14029983Smsmith /* 14129983Smsmith * See if we can disable input processing; this will 14229983Smsmith * not give the desired result if we are in a pipeline 14329983Smsmith * and someone upstream is still in line-by-line mode. 14429983Smsmith */ 14529983Smsmith tsaved = 0; 14629983Smsmith if (tcgetattr(0, &told) == 0) { 14729983Smsmith memcpy(&tnew, &told, sizeof(told)); 14829983Smsmith cfmakeraw(&tnew); 14929983Smsmith tcsetattr(0, TCSANOW, &tnew); 15029983Smsmith tsaved = 1; 15129983Smsmith } 15229983Smsmith /* 15329983Smsmith * Wait for something to become available. 15429983Smsmith */ 15529983Smsmith FD_ZERO(&ifds); 15629983Smsmith FD_SET(0, &ifds); 15729983Smsmith status = select(1, &ifds, NULL, NULL, &tv); 15829983Smsmith if (tsaved) 15929983Smsmith tcsetattr(0, TCSANOW, &told); 16029983Smsmith /* 16129983Smsmith * If there's nothing ready, return an error. 16229983Smsmith */ 16329983Smsmith if (status <= 0) 16429983Smsmith return(1); 16529983Smsmith } 16629983Smsmith 1671556Srgrimes status = 0; 1681556Srgrimes startword = 1; 1691556Srgrimes backslash = 0; 1701556Srgrimes STARTSTACKSTR(p); 1711556Srgrimes for (;;) { 1721556Srgrimes if (read(0, &c, 1) != 1) { 1731556Srgrimes status = 1; 1741556Srgrimes break; 1751556Srgrimes } 1761556Srgrimes if (c == '\0') 1771556Srgrimes continue; 1781556Srgrimes if (backslash) { 1791556Srgrimes backslash = 0; 1801556Srgrimes if (c != '\n') 1811556Srgrimes STPUTC(c, p); 1821556Srgrimes continue; 1831556Srgrimes } 1841556Srgrimes if (eflag && c == '\\') { 1851556Srgrimes backslash++; 1861556Srgrimes continue; 1871556Srgrimes } 1881556Srgrimes if (c == '\n') 1891556Srgrimes break; 1901556Srgrimes if (startword && *ifs == ' ' && strchr(ifs, c)) { 1911556Srgrimes continue; 1921556Srgrimes } 1931556Srgrimes startword = 0; 1941556Srgrimes if (backslash && c == '\\') { 1951556Srgrimes if (read(0, &c, 1) != 1) { 1961556Srgrimes status = 1; 1971556Srgrimes break; 1981556Srgrimes } 1991556Srgrimes STPUTC(c, p); 2001556Srgrimes } else if (ap[1] != NULL && strchr(ifs, c) != NULL) { 2011556Srgrimes STACKSTRNUL(p); 2021556Srgrimes setvar(*ap, stackblock(), 0); 2031556Srgrimes ap++; 2041556Srgrimes startword = 1; 2051556Srgrimes STARTSTACKSTR(p); 2061556Srgrimes } else { 2071556Srgrimes STPUTC(c, p); 2081556Srgrimes } 2091556Srgrimes } 2101556Srgrimes STACKSTRNUL(p); 2111556Srgrimes setvar(*ap, stackblock(), 0); 2121556Srgrimes while (*++ap != NULL) 2131556Srgrimes setvar(*ap, nullstr, 0); 2141556Srgrimes return status; 2151556Srgrimes} 2161556Srgrimes 2171556Srgrimes 2181556Srgrimes 21917987Speterint 22017987Speterumaskcmd(argc, argv) 22125905Ssteve int argc __unused; 22220425Ssteve char **argv; 22317987Speter{ 22417987Speter char *ap; 2251556Srgrimes int mask; 2261556Srgrimes int i; 22717987Speter int symbolic_mode = 0; 2281556Srgrimes 22917987Speter while ((i = nextopt("S")) != '\0') { 23017987Speter symbolic_mode = 1; 2311556Srgrimes } 23211571Sjoerg 23317987Speter INTOFF; 23417987Speter mask = umask(0); 23517987Speter umask(mask); 23617987Speter INTON; 23711571Sjoerg 23817987Speter if ((ap = *argptr) == NULL) { 23917987Speter if (symbolic_mode) { 24017987Speter char u[4], g[4], o[4]; 24111571Sjoerg 24217987Speter i = 0; 24317987Speter if ((mask & S_IRUSR) == 0) 24417987Speter u[i++] = 'r'; 24517987Speter if ((mask & S_IWUSR) == 0) 24617987Speter u[i++] = 'w'; 24717987Speter if ((mask & S_IXUSR) == 0) 24817987Speter u[i++] = 'x'; 24917987Speter u[i] = '\0'; 25011571Sjoerg 25117987Speter i = 0; 25217987Speter if ((mask & S_IRGRP) == 0) 25317987Speter g[i++] = 'r'; 25417987Speter if ((mask & S_IWGRP) == 0) 25517987Speter g[i++] = 'w'; 25617987Speter if ((mask & S_IXGRP) == 0) 25717987Speter g[i++] = 'x'; 25817987Speter g[i] = '\0'; 25911571Sjoerg 26017987Speter i = 0; 26117987Speter if ((mask & S_IROTH) == 0) 26217987Speter o[i++] = 'r'; 26317987Speter if ((mask & S_IWOTH) == 0) 26417987Speter o[i++] = 'w'; 26517987Speter if ((mask & S_IXOTH) == 0) 26617987Speter o[i++] = 'x'; 26717987Speter o[i] = '\0'; 26811571Sjoerg 26917987Speter out1fmt("u=%s,g=%s,o=%s\n", u, g, o); 27017987Speter } else { 27117987Speter out1fmt("%.4o\n", mask); 27217987Speter } 27317987Speter } else { 27417987Speter if (isdigit(*ap)) { 27517987Speter mask = 0; 27617987Speter do { 27717987Speter if (*ap >= '8' || *ap < '0') 27817987Speter error("Illegal number: %s", argv[1]); 27917987Speter mask = (mask << 3) + (*ap - '0'); 28017987Speter } while (*++ap != '\0'); 28117987Speter umask(mask); 28217987Speter } else { 28320425Ssteve void *set; 28417987Speter if ((set = setmode (ap)) == 0) 28517987Speter error("Illegal number: %s", ap); 28611571Sjoerg 28717987Speter mask = getmode (set, ~mask & 0777); 28817987Speter umask(~mask & 0777); 28917987Speter } 29017987Speter } 29111571Sjoerg return 0; 29211571Sjoerg} 29311571Sjoerg 29417987Speter/* 29517987Speter * ulimit builtin 29617987Speter * 29717987Speter * This code, originally by Doug Gwyn, Doug Kingston, Eric Gisin, and 29817987Speter * Michael Rendell was ripped from pdksh 5.0.8 and hacked for use with 29917987Speter * ash by J.T. Conklin. 30017987Speter * 30117987Speter * Public domain. 30217987Speter */ 30311571Sjoerg 30417987Speterstruct limits { 30517987Speter const char *name; 30618016Speter const char *units; 30717987Speter int cmd; 30817987Speter int factor; /* multiply by to get rlim_{cur,max} values */ 30917987Speter char option; 31017987Speter}; 31111571Sjoerg 31217987Speterstatic const struct limits limits[] = { 31317987Speter#ifdef RLIMIT_CPU 31418016Speter { "cpu time", "seconds", RLIMIT_CPU, 1, 't' }, 31517987Speter#endif 31617987Speter#ifdef RLIMIT_FSIZE 31718016Speter { "file size", "512-blocks", RLIMIT_FSIZE, 512, 'f' }, 31817987Speter#endif 31917987Speter#ifdef RLIMIT_DATA 32018016Speter { "data seg size", "kbytes", RLIMIT_DATA, 1024, 'd' }, 32117987Speter#endif 32217987Speter#ifdef RLIMIT_STACK 32318016Speter { "stack size", "kbytes", RLIMIT_STACK, 1024, 's' }, 32417987Speter#endif 32517987Speter#ifdef RLIMIT_CORE 32618016Speter { "core file size", "512-blocks", RLIMIT_CORE, 512, 'c' }, 32717987Speter#endif 32817987Speter#ifdef RLIMIT_RSS 32918016Speter { "max memory size", "kbytes", RLIMIT_RSS, 1024, 'm' }, 33017987Speter#endif 33117987Speter#ifdef RLIMIT_MEMLOCK 33218016Speter { "locked memory", "kbytes", RLIMIT_MEMLOCK, 1024, 'l' }, 33317987Speter#endif 33417987Speter#ifdef RLIMIT_NPROC 33518016Speter { "max user processes", (char *)0, RLIMIT_NPROC, 1, 'u' }, 33617987Speter#endif 33717987Speter#ifdef RLIMIT_NOFILE 33818016Speter { "open files", (char *)0, RLIMIT_NOFILE, 1, 'n' }, 33917987Speter#endif 34017987Speter#ifdef RLIMIT_VMEM 34118016Speter { "virtual mem size", "kbytes", RLIMIT_VMEM, 1024, 'v' }, 34217987Speter#endif 34317987Speter#ifdef RLIMIT_SWAP 34418016Speter { "swap limit", "kbytes", RLIMIT_SWAP, 1024, 'w' }, 34517987Speter#endif 34618016Speter { (char *) 0, (char *)0, 0, 0, '\0' } 34717987Speter}; 34817987Speter 34917987Speterint 35017987Speterulimitcmd(argc, argv) 35125905Ssteve int argc __unused; 35225905Ssteve char **argv __unused; 35317987Speter{ 35425222Ssteve int c; 35518018Speter quad_t val = 0; 35617987Speter enum { SOFT = 0x1, HARD = 0x2 } 35717987Speter how = SOFT | HARD; 35817987Speter const struct limits *l; 35917987Speter int set, all = 0; 36017987Speter int optc, what; 36117987Speter struct rlimit limit; 36211571Sjoerg 36317987Speter what = 'f'; 36418016Speter while ((optc = nextopt("HSatfdsmcnul")) != '\0') 36517987Speter switch (optc) { 36611571Sjoerg case 'H': 36717987Speter how = HARD; 36811571Sjoerg break; 36911571Sjoerg case 'S': 37017987Speter how = SOFT; 37111571Sjoerg break; 37211571Sjoerg case 'a': 37317987Speter all = 1; 37411571Sjoerg break; 37517987Speter default: 37617987Speter what = optc; 37711571Sjoerg } 37811571Sjoerg 37917987Speter for (l = limits; l->name && l->option != what; l++) 38017987Speter ; 38117987Speter if (!l->name) 38220425Ssteve error("ulimit: internal error (%c)", what); 38317987Speter 38417987Speter set = *argptr ? 1 : 0; 38517987Speter if (set) { 38617987Speter char *p = *argptr; 38717987Speter 38817987Speter if (all || argptr[1]) 38920425Ssteve error("ulimit: too many arguments"); 39017987Speter if (strcmp(p, "unlimited") == 0) 39111571Sjoerg val = RLIM_INFINITY; 39211571Sjoerg else { 39317987Speter val = (quad_t) 0; 39417987Speter 39517987Speter while ((c = *p++) >= '0' && c <= '9') 39617987Speter { 39717987Speter val = (val * 10) + (long)(c - '0'); 39817987Speter if (val < (quad_t) 0) 39917987Speter break; 40017987Speter } 40117987Speter if (c) 40220425Ssteve error("ulimit: bad number"); 40317987Speter val *= l->factor; 40411571Sjoerg } 40517987Speter } 40617987Speter if (all) { 40718016Speter for (l = limits; l->name; l++) { 40818016Speter char optbuf[40]; 40918016Speter if (getrlimit(l->cmd, &limit) < 0) 41020425Ssteve error("ulimit: can't get limit: %s", strerror(errno)); 41117987Speter if (how & SOFT) 41217987Speter val = limit.rlim_cur; 41317987Speter else if (how & HARD) 41417987Speter val = limit.rlim_max; 41517987Speter 41618016Speter if (l->units) 41718016Speter snprintf(optbuf, sizeof(optbuf), 41818019Speter "(%s, -%c) ", l->units, l->option); 41918016Speter else 42018016Speter snprintf(optbuf, sizeof(optbuf), 42118019Speter "(-%c) ", l->option); 42218019Speter out1fmt("%-18s %18s ", l->name, optbuf); 42317987Speter if (val == RLIM_INFINITY) 42417987Speter out1fmt("unlimited\n"); 42517987Speter else 42617987Speter { 42717987Speter val /= l->factor; 42818018Speter out1fmt("%qd\n", (quad_t) val); 42917987Speter } 43011571Sjoerg } 43117987Speter return 0; 43211571Sjoerg } 43317987Speter 43418016Speter if (getrlimit(l->cmd, &limit) < 0) 43520425Ssteve error("ulimit: can't get limit: %s", strerror(errno)); 43617987Speter if (set) { 43717987Speter if (how & SOFT) 43817987Speter limit.rlim_cur = val; 43917987Speter if (how & HARD) 44017987Speter limit.rlim_max = val; 44117987Speter if (setrlimit(l->cmd, &limit) < 0) 44220425Ssteve error("ulimit: bad limit: %s", strerror(errno)); 44317987Speter } else { 44417987Speter if (how & SOFT) 44517987Speter val = limit.rlim_cur; 44617987Speter else if (how & HARD) 44717987Speter val = limit.rlim_max; 44817987Speter 44917987Speter if (val == RLIM_INFINITY) 45017987Speter out1fmt("unlimited\n"); 45117987Speter else 45217987Speter { 45317987Speter val /= l->factor; 45418018Speter out1fmt("%qd\n", (quad_t) val); 45517987Speter } 45617987Speter } 45711571Sjoerg return 0; 45811571Sjoerg} 459