miscbltin.c revision 46684
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. 351556Srgrimes */ 361556Srgrimes 371556Srgrimes#ifndef lint 3836150Scharnier#if 0 3936150Scharnierstatic char sccsid[] = "@(#)miscbltin.c 8.4 (Berkeley) 5/4/95"; 4036150Scharnier#endif 4136150Scharnierstatic const char rcsid[] = 4246684Skris "$Id: miscbltin.c,v 1.18 1998/12/16 04:45:35 imp Exp $"; 431556Srgrimes#endif /* not lint */ 441556Srgrimes 451556Srgrimes/* 4646684Skris * Miscellaneous builtins. 471556Srgrimes */ 481556Srgrimes 4917987Speter#include <sys/types.h> 5017987Speter#include <sys/stat.h> 5117987Speter#include <sys/time.h> 5217987Speter#include <sys/resource.h> 5317987Speter#include <unistd.h> 5417987Speter#include <ctype.h> 5518016Speter#include <errno.h> 5618018Speter#include <stdio.h> 5738536Scracauer#include <stdlib.h> 5829983Smsmith#include <termios.h> 5917987Speter 601556Srgrimes#include "shell.h" 611556Srgrimes#include "options.h" 621556Srgrimes#include "var.h" 631556Srgrimes#include "output.h" 641556Srgrimes#include "memalloc.h" 651556Srgrimes#include "error.h" 661556Srgrimes#include "mystring.h" 671556Srgrimes 681556Srgrimes#undef eflag 691556Srgrimes 701556Srgrimesextern char **argptr; /* argument list for builtin command */ 711556Srgrimes 721556Srgrimes 731556Srgrimes/* 741556Srgrimes * The read builtin. The -e option causes backslashes to escape the 751556Srgrimes * following character. 761556Srgrimes * 771556Srgrimes * This uses unbuffered input, which may be avoidable in some cases. 781556Srgrimes */ 791556Srgrimes 8017987Speterint 8117987Speterreadcmd(argc, argv) 8225905Ssteve int argc __unused; 8325905Ssteve char **argv __unused; 8417987Speter{ 851556Srgrimes char **ap; 861556Srgrimes int backslash; 871556Srgrimes char c; 881556Srgrimes int eflag; 891556Srgrimes char *prompt; 901556Srgrimes char *ifs; 911556Srgrimes char *p; 921556Srgrimes int startword; 931556Srgrimes int status; 941556Srgrimes int i; 9529983Smsmith struct timeval tv; 9629983Smsmith char *tvptr; 9729983Smsmith fd_set ifds; 9829983Smsmith struct termios told, tnew; 9929983Smsmith int tsaved; 1001556Srgrimes 1011556Srgrimes eflag = 0; 1021556Srgrimes prompt = NULL; 10329983Smsmith tv.tv_sec = -1; 10429983Smsmith tv.tv_usec = 0; 10529983Smsmith while ((i = nextopt("ep:t:")) != '\0') { 10629983Smsmith switch(i) { 10729983Smsmith case 'p': 1081556Srgrimes prompt = optarg; 10929983Smsmith break; 11029983Smsmith case 'e': 1111556Srgrimes eflag = 1; 11229983Smsmith break; 11329983Smsmith case 't': 11429983Smsmith tv.tv_sec = strtol(optarg, &tvptr, 0); 11529983Smsmith if (tvptr == optarg) 11629983Smsmith error("timeout value"); 11729983Smsmith switch(*tvptr) { 11829983Smsmith case 0: 11929983Smsmith case 's': 12029983Smsmith break; 12129983Smsmith case 'h': 12229983Smsmith tv.tv_sec *= 60; 12329983Smsmith /* FALLTHROUGH */ 12429983Smsmith case 'm': 12529983Smsmith tv.tv_sec *= 60; 12629983Smsmith break; 12729983Smsmith default: 12829983Smsmith error("timeout unit"); 12929983Smsmith } 13029983Smsmith break; 13129983Smsmith } 1321556Srgrimes } 1331556Srgrimes if (prompt && isatty(0)) { 1341556Srgrimes out2str(prompt); 1351556Srgrimes flushall(); 1361556Srgrimes } 1371556Srgrimes if (*(ap = argptr) == NULL) 1381556Srgrimes error("arg count"); 1391556Srgrimes if ((ifs = bltinlookup("IFS", 1)) == NULL) 1401556Srgrimes ifs = nullstr; 14129983Smsmith 14229983Smsmith if (tv.tv_sec >= 0) { 14329983Smsmith /* 14429983Smsmith * See if we can disable input processing; this will 14529983Smsmith * not give the desired result if we are in a pipeline 14629983Smsmith * and someone upstream is still in line-by-line mode. 14729983Smsmith */ 14829983Smsmith tsaved = 0; 14929983Smsmith if (tcgetattr(0, &told) == 0) { 15029983Smsmith memcpy(&tnew, &told, sizeof(told)); 15129983Smsmith cfmakeraw(&tnew); 15229983Smsmith tcsetattr(0, TCSANOW, &tnew); 15329983Smsmith tsaved = 1; 15429983Smsmith } 15529983Smsmith /* 15629983Smsmith * Wait for something to become available. 15729983Smsmith */ 15829983Smsmith FD_ZERO(&ifds); 15929983Smsmith FD_SET(0, &ifds); 16029983Smsmith status = select(1, &ifds, NULL, NULL, &tv); 16129983Smsmith if (tsaved) 16229983Smsmith tcsetattr(0, TCSANOW, &told); 16329983Smsmith /* 16429983Smsmith * If there's nothing ready, return an error. 16529983Smsmith */ 16629983Smsmith if (status <= 0) 16729983Smsmith return(1); 16829983Smsmith } 16929983Smsmith 1701556Srgrimes status = 0; 1711556Srgrimes startword = 1; 1721556Srgrimes backslash = 0; 1731556Srgrimes STARTSTACKSTR(p); 1741556Srgrimes for (;;) { 1751556Srgrimes if (read(0, &c, 1) != 1) { 1761556Srgrimes status = 1; 1771556Srgrimes break; 1781556Srgrimes } 1791556Srgrimes if (c == '\0') 1801556Srgrimes continue; 1811556Srgrimes if (backslash) { 1821556Srgrimes backslash = 0; 1831556Srgrimes if (c != '\n') 1841556Srgrimes STPUTC(c, p); 1851556Srgrimes continue; 1861556Srgrimes } 1871556Srgrimes if (eflag && c == '\\') { 1881556Srgrimes backslash++; 1891556Srgrimes continue; 1901556Srgrimes } 1911556Srgrimes if (c == '\n') 1921556Srgrimes break; 1931556Srgrimes if (startword && *ifs == ' ' && strchr(ifs, c)) { 1941556Srgrimes continue; 1951556Srgrimes } 1961556Srgrimes startword = 0; 1971556Srgrimes if (backslash && c == '\\') { 1981556Srgrimes if (read(0, &c, 1) != 1) { 1991556Srgrimes status = 1; 2001556Srgrimes break; 2011556Srgrimes } 2021556Srgrimes STPUTC(c, p); 2031556Srgrimes } else if (ap[1] != NULL && strchr(ifs, c) != NULL) { 2041556Srgrimes STACKSTRNUL(p); 2051556Srgrimes setvar(*ap, stackblock(), 0); 2061556Srgrimes ap++; 2071556Srgrimes startword = 1; 2081556Srgrimes STARTSTACKSTR(p); 2091556Srgrimes } else { 2101556Srgrimes STPUTC(c, p); 2111556Srgrimes } 2121556Srgrimes } 2131556Srgrimes STACKSTRNUL(p); 2141556Srgrimes setvar(*ap, stackblock(), 0); 2151556Srgrimes while (*++ap != NULL) 2161556Srgrimes setvar(*ap, nullstr, 0); 2171556Srgrimes return status; 2181556Srgrimes} 2191556Srgrimes 2201556Srgrimes 2211556Srgrimes 22217987Speterint 22317987Speterumaskcmd(argc, argv) 22425905Ssteve int argc __unused; 22520425Ssteve char **argv; 22617987Speter{ 22717987Speter char *ap; 2281556Srgrimes int mask; 2291556Srgrimes int i; 23017987Speter int symbolic_mode = 0; 2311556Srgrimes 23217987Speter while ((i = nextopt("S")) != '\0') { 23317987Speter symbolic_mode = 1; 2341556Srgrimes } 23511571Sjoerg 23617987Speter INTOFF; 23717987Speter mask = umask(0); 23817987Speter umask(mask); 23917987Speter INTON; 24011571Sjoerg 24117987Speter if ((ap = *argptr) == NULL) { 24217987Speter if (symbolic_mode) { 24317987Speter char u[4], g[4], o[4]; 24411571Sjoerg 24517987Speter i = 0; 24617987Speter if ((mask & S_IRUSR) == 0) 24717987Speter u[i++] = 'r'; 24817987Speter if ((mask & S_IWUSR) == 0) 24917987Speter u[i++] = 'w'; 25017987Speter if ((mask & S_IXUSR) == 0) 25117987Speter u[i++] = 'x'; 25217987Speter u[i] = '\0'; 25311571Sjoerg 25417987Speter i = 0; 25517987Speter if ((mask & S_IRGRP) == 0) 25617987Speter g[i++] = 'r'; 25717987Speter if ((mask & S_IWGRP) == 0) 25817987Speter g[i++] = 'w'; 25917987Speter if ((mask & S_IXGRP) == 0) 26017987Speter g[i++] = 'x'; 26117987Speter g[i] = '\0'; 26211571Sjoerg 26317987Speter i = 0; 26417987Speter if ((mask & S_IROTH) == 0) 26517987Speter o[i++] = 'r'; 26617987Speter if ((mask & S_IWOTH) == 0) 26717987Speter o[i++] = 'w'; 26817987Speter if ((mask & S_IXOTH) == 0) 26917987Speter o[i++] = 'x'; 27017987Speter o[i] = '\0'; 27111571Sjoerg 27217987Speter out1fmt("u=%s,g=%s,o=%s\n", u, g, o); 27317987Speter } else { 27417987Speter out1fmt("%.4o\n", mask); 27517987Speter } 27617987Speter } else { 27717987Speter if (isdigit(*ap)) { 27817987Speter mask = 0; 27917987Speter do { 28017987Speter if (*ap >= '8' || *ap < '0') 28117987Speter error("Illegal number: %s", argv[1]); 28217987Speter mask = (mask << 3) + (*ap - '0'); 28317987Speter } while (*++ap != '\0'); 28417987Speter umask(mask); 28517987Speter } else { 28620425Ssteve void *set; 28717987Speter if ((set = setmode (ap)) == 0) 28841844Simp error("Illegal number: %s", ap); 28911571Sjoerg 29017987Speter mask = getmode (set, ~mask & 0777); 29117987Speter umask(~mask & 0777); 29241844Simp free(set); 29317987Speter } 29417987Speter } 29511571Sjoerg return 0; 29611571Sjoerg} 29711571Sjoerg 29817987Speter/* 29917987Speter * ulimit builtin 30017987Speter * 30117987Speter * This code, originally by Doug Gwyn, Doug Kingston, Eric Gisin, and 30217987Speter * Michael Rendell was ripped from pdksh 5.0.8 and hacked for use with 30317987Speter * ash by J.T. Conklin. 30417987Speter * 30517987Speter * Public domain. 30617987Speter */ 30711571Sjoerg 30817987Speterstruct limits { 30917987Speter const char *name; 31018016Speter const char *units; 31117987Speter int cmd; 31217987Speter int factor; /* multiply by to get rlim_{cur,max} values */ 31317987Speter char option; 31417987Speter}; 31511571Sjoerg 31617987Speterstatic const struct limits limits[] = { 31717987Speter#ifdef RLIMIT_CPU 31818016Speter { "cpu time", "seconds", RLIMIT_CPU, 1, 't' }, 31917987Speter#endif 32017987Speter#ifdef RLIMIT_FSIZE 32118016Speter { "file size", "512-blocks", RLIMIT_FSIZE, 512, 'f' }, 32217987Speter#endif 32317987Speter#ifdef RLIMIT_DATA 32418016Speter { "data seg size", "kbytes", RLIMIT_DATA, 1024, 'd' }, 32517987Speter#endif 32617987Speter#ifdef RLIMIT_STACK 32718016Speter { "stack size", "kbytes", RLIMIT_STACK, 1024, 's' }, 32817987Speter#endif 32917987Speter#ifdef RLIMIT_CORE 33018016Speter { "core file size", "512-blocks", RLIMIT_CORE, 512, 'c' }, 33117987Speter#endif 33217987Speter#ifdef RLIMIT_RSS 33318016Speter { "max memory size", "kbytes", RLIMIT_RSS, 1024, 'm' }, 33417987Speter#endif 33517987Speter#ifdef RLIMIT_MEMLOCK 33618016Speter { "locked memory", "kbytes", RLIMIT_MEMLOCK, 1024, 'l' }, 33717987Speter#endif 33817987Speter#ifdef RLIMIT_NPROC 33918016Speter { "max user processes", (char *)0, RLIMIT_NPROC, 1, 'u' }, 34017987Speter#endif 34117987Speter#ifdef RLIMIT_NOFILE 34218016Speter { "open files", (char *)0, RLIMIT_NOFILE, 1, 'n' }, 34317987Speter#endif 34417987Speter#ifdef RLIMIT_VMEM 34518016Speter { "virtual mem size", "kbytes", RLIMIT_VMEM, 1024, 'v' }, 34617987Speter#endif 34717987Speter#ifdef RLIMIT_SWAP 34818016Speter { "swap limit", "kbytes", RLIMIT_SWAP, 1024, 'w' }, 34917987Speter#endif 35018016Speter { (char *) 0, (char *)0, 0, 0, '\0' } 35117987Speter}; 35217987Speter 35317987Speterint 35417987Speterulimitcmd(argc, argv) 35525905Ssteve int argc __unused; 35625905Ssteve char **argv __unused; 35717987Speter{ 35825222Ssteve int c; 35918018Speter quad_t val = 0; 36017987Speter enum { SOFT = 0x1, HARD = 0x2 } 36117987Speter how = SOFT | HARD; 36217987Speter const struct limits *l; 36317987Speter int set, all = 0; 36417987Speter int optc, what; 36517987Speter struct rlimit limit; 36611571Sjoerg 36717987Speter what = 'f'; 36818016Speter while ((optc = nextopt("HSatfdsmcnul")) != '\0') 36917987Speter switch (optc) { 37011571Sjoerg case 'H': 37117987Speter how = HARD; 37211571Sjoerg break; 37311571Sjoerg case 'S': 37417987Speter how = SOFT; 37511571Sjoerg break; 37611571Sjoerg case 'a': 37717987Speter all = 1; 37811571Sjoerg break; 37917987Speter default: 38017987Speter what = optc; 38111571Sjoerg } 38211571Sjoerg 38317987Speter for (l = limits; l->name && l->option != what; l++) 38417987Speter ; 38517987Speter if (!l->name) 38620425Ssteve error("ulimit: internal error (%c)", what); 38717987Speter 38817987Speter set = *argptr ? 1 : 0; 38917987Speter if (set) { 39017987Speter char *p = *argptr; 39117987Speter 39217987Speter if (all || argptr[1]) 39320425Ssteve error("ulimit: too many arguments"); 39417987Speter if (strcmp(p, "unlimited") == 0) 39511571Sjoerg val = RLIM_INFINITY; 39611571Sjoerg else { 39717987Speter val = (quad_t) 0; 39817987Speter 39917987Speter while ((c = *p++) >= '0' && c <= '9') 40017987Speter { 40117987Speter val = (val * 10) + (long)(c - '0'); 40217987Speter if (val < (quad_t) 0) 40317987Speter break; 40417987Speter } 40517987Speter if (c) 40620425Ssteve error("ulimit: bad number"); 40717987Speter val *= l->factor; 40811571Sjoerg } 40917987Speter } 41017987Speter if (all) { 41118016Speter for (l = limits; l->name; l++) { 41218016Speter char optbuf[40]; 41318016Speter if (getrlimit(l->cmd, &limit) < 0) 41420425Ssteve error("ulimit: can't get limit: %s", strerror(errno)); 41517987Speter if (how & SOFT) 41617987Speter val = limit.rlim_cur; 41717987Speter else if (how & HARD) 41817987Speter val = limit.rlim_max; 41917987Speter 42018016Speter if (l->units) 42118016Speter snprintf(optbuf, sizeof(optbuf), 42218019Speter "(%s, -%c) ", l->units, l->option); 42318016Speter else 42418016Speter snprintf(optbuf, sizeof(optbuf), 42518019Speter "(-%c) ", l->option); 42618019Speter out1fmt("%-18s %18s ", l->name, optbuf); 42717987Speter if (val == RLIM_INFINITY) 42817987Speter out1fmt("unlimited\n"); 42917987Speter else 43017987Speter { 43117987Speter val /= l->factor; 43218018Speter out1fmt("%qd\n", (quad_t) val); 43317987Speter } 43411571Sjoerg } 43517987Speter return 0; 43611571Sjoerg } 43717987Speter 43818016Speter if (getrlimit(l->cmd, &limit) < 0) 43920425Ssteve error("ulimit: can't get limit: %s", strerror(errno)); 44017987Speter if (set) { 44117987Speter if (how & SOFT) 44217987Speter limit.rlim_cur = val; 44317987Speter if (how & HARD) 44417987Speter limit.rlim_max = val; 44517987Speter if (setrlimit(l->cmd, &limit) < 0) 44620425Ssteve error("ulimit: bad limit: %s", strerror(errno)); 44717987Speter } else { 44817987Speter if (how & SOFT) 44917987Speter val = limit.rlim_cur; 45017987Speter else if (how & HARD) 45117987Speter val = limit.rlim_max; 45217987Speter 45317987Speter if (val == RLIM_INFINITY) 45417987Speter out1fmt("unlimited\n"); 45517987Speter else 45617987Speter { 45717987Speter val /= l->factor; 45818018Speter out1fmt("%qd\n", (quad_t) val); 45917987Speter } 46017987Speter } 46111571Sjoerg return 0; 46211571Sjoerg} 463