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 * 4. Neither the name of the University nor the names of its contributors 171556Srgrimes * may be used to endorse or promote products derived from this software 181556Srgrimes * without specific prior written permission. 191556Srgrimes * 201556Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 211556Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 221556Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 231556Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 241556Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 251556Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 261556Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 271556Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 281556Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 291556Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 301556Srgrimes * SUCH DAMAGE. 311556Srgrimes */ 321556Srgrimes 331556Srgrimes#ifndef lint 3436150Scharnier#if 0 3536150Scharnierstatic char sccsid[] = "@(#)miscbltin.c 8.4 (Berkeley) 5/4/95"; 3636150Scharnier#endif 371556Srgrimes#endif /* not lint */ 3899110Sobrien#include <sys/cdefs.h> 3999110Sobrien__FBSDID("$FreeBSD$"); 401556Srgrimes 411556Srgrimes/* 4246684Skris * Miscellaneous builtins. 431556Srgrimes */ 441556Srgrimes 4517987Speter#include <sys/types.h> 4617987Speter#include <sys/stat.h> 4717987Speter#include <sys/time.h> 4817987Speter#include <sys/resource.h> 4917987Speter#include <unistd.h> 5018016Speter#include <errno.h> 51104282Smux#include <stdint.h> 5218018Speter#include <stdio.h> 5338536Scracauer#include <stdlib.h> 5417987Speter 551556Srgrimes#include "shell.h" 561556Srgrimes#include "options.h" 571556Srgrimes#include "var.h" 581556Srgrimes#include "output.h" 591556Srgrimes#include "memalloc.h" 601556Srgrimes#include "error.h" 611556Srgrimes#include "mystring.h" 62246167Sjilles#include "syntax.h" 63250214Sjilles#include "trap.h" 641556Srgrimes 651556Srgrimes#undef eflag 661556Srgrimes 67149018Sstefanfint readcmd(int, char **); 68149018Sstefanfint umaskcmd(int, char **); 69149018Sstefanfint ulimitcmd(int, char **); 70149018Sstefanf 711556Srgrimes/* 7250394Stg * The read builtin. The -r option causes backslashes to be treated like 7350394Stg * ordinary characters. 741556Srgrimes * 751556Srgrimes * This uses unbuffered input, which may be avoidable in some cases. 76190295Sstefanf * 77190295Sstefanf * Note that if IFS=' :' then read x y should work so that: 78190295Sstefanf * 'a b' x='a', y='b' 79190295Sstefanf * ' a b ' x='a', y='b' 80190295Sstefanf * ':b' x='', y='b' 81190295Sstefanf * ':' x='', y='' 82190295Sstefanf * '::' x='', y='' 83190295Sstefanf * ': :' x='', y='' 84190295Sstefanf * ':::' x='', y='::' 85190295Sstefanf * ':b c:' x='', y='b c:' 861556Srgrimes */ 871556Srgrimes 8817987Speterint 8990111Simpreadcmd(int argc __unused, char **argv __unused) 9017987Speter{ 911556Srgrimes char **ap; 921556Srgrimes int backslash; 931556Srgrimes char c; 9450394Stg int rflag; 951556Srgrimes char *prompt; 96201053Sjilles const char *ifs; 971556Srgrimes char *p; 981556Srgrimes int startword; 991556Srgrimes int status; 1001556Srgrimes int i; 101190295Sstefanf int is_ifs; 102190295Sstefanf int saveall = 0; 10329983Smsmith struct timeval tv; 10429983Smsmith char *tvptr; 10529983Smsmith fd_set ifds; 106250214Sjilles ssize_t nread; 107250214Sjilles int sig; 1081556Srgrimes 10950394Stg rflag = 0; 1101556Srgrimes prompt = NULL; 11129983Smsmith tv.tv_sec = -1; 11229983Smsmith tv.tv_usec = 0; 11350394Stg while ((i = nextopt("erp:t:")) != '\0') { 11429983Smsmith switch(i) { 11529983Smsmith case 'p': 11659436Scracauer prompt = shoptarg; 11729983Smsmith break; 11829983Smsmith case 'e': 11929983Smsmith break; 12050394Stg case 'r': 12150394Stg rflag = 1; 12250394Stg break; 12329983Smsmith case 't': 12459436Scracauer tv.tv_sec = strtol(shoptarg, &tvptr, 0); 12559436Scracauer if (tvptr == shoptarg) 12629983Smsmith error("timeout value"); 12729983Smsmith switch(*tvptr) { 12829983Smsmith case 0: 12929983Smsmith case 's': 13029983Smsmith break; 13129983Smsmith case 'h': 13229983Smsmith tv.tv_sec *= 60; 13329983Smsmith /* FALLTHROUGH */ 13429983Smsmith case 'm': 13529983Smsmith tv.tv_sec *= 60; 13629983Smsmith break; 13729983Smsmith default: 13829983Smsmith error("timeout unit"); 13929983Smsmith } 14029983Smsmith break; 14129983Smsmith } 1421556Srgrimes } 1431556Srgrimes if (prompt && isatty(0)) { 1441556Srgrimes out2str(prompt); 1451556Srgrimes flushall(); 1461556Srgrimes } 1471556Srgrimes if (*(ap = argptr) == NULL) 1481556Srgrimes error("arg count"); 1491556Srgrimes if ((ifs = bltinlookup("IFS", 1)) == NULL) 150190298Sstefanf ifs = " \t\n"; 15129983Smsmith 15229983Smsmith if (tv.tv_sec >= 0) { 15329983Smsmith /* 15429983Smsmith * Wait for something to become available. 15529983Smsmith */ 15629983Smsmith FD_ZERO(&ifds); 15729983Smsmith FD_SET(0, &ifds); 15829983Smsmith status = select(1, &ifds, NULL, NULL, &tv); 15929983Smsmith /* 16029983Smsmith * If there's nothing ready, return an error. 16129983Smsmith */ 162250214Sjilles if (status <= 0) { 163250214Sjilles sig = pendingsig; 164250214Sjilles return (128 + (sig != 0 ? sig : SIGALRM)); 165250214Sjilles } 16629983Smsmith } 16729983Smsmith 1681556Srgrimes status = 0; 169190295Sstefanf startword = 2; 1701556Srgrimes backslash = 0; 1711556Srgrimes STARTSTACKSTR(p); 1721556Srgrimes for (;;) { 173250214Sjilles nread = read(STDIN_FILENO, &c, 1); 174250214Sjilles if (nread == -1) { 175250214Sjilles if (errno == EINTR) { 176250214Sjilles sig = pendingsig; 177250214Sjilles if (sig == 0) 178250214Sjilles continue; 179250214Sjilles status = 128 + sig; 180250214Sjilles break; 181250214Sjilles } 182250214Sjilles warning("read error: %s", strerror(errno)); 183250214Sjilles status = 2; 184250214Sjilles break; 185250214Sjilles } else if (nread != 1) { 1861556Srgrimes status = 1; 1871556Srgrimes break; 1881556Srgrimes } 1891556Srgrimes if (c == '\0') 1901556Srgrimes continue; 191215783Sjilles CHECKSTRSPACE(1, p); 1921556Srgrimes if (backslash) { 1931556Srgrimes backslash = 0; 194212339Sjilles startword = 0; 1951556Srgrimes if (c != '\n') 196215783Sjilles USTPUTC(c, p); 1971556Srgrimes continue; 1981556Srgrimes } 19950394Stg if (!rflag && c == '\\') { 2001556Srgrimes backslash++; 2011556Srgrimes continue; 2021556Srgrimes } 2031556Srgrimes if (c == '\n') 2041556Srgrimes break; 205190295Sstefanf if (strchr(ifs, c)) 206190295Sstefanf is_ifs = strchr(" \t\n", c) ? 1 : 2; 207190295Sstefanf else 208190295Sstefanf is_ifs = 0; 209190295Sstefanf 210190295Sstefanf if (startword != 0) { 211190295Sstefanf if (is_ifs == 1) { 212190295Sstefanf /* Ignore leading IFS whitespace */ 213190295Sstefanf if (saveall) 214215783Sjilles USTPUTC(c, p); 215190295Sstefanf continue; 216190295Sstefanf } 217190295Sstefanf if (is_ifs == 2 && startword == 1) { 218190295Sstefanf /* Only one non-whitespace IFS per word */ 219190295Sstefanf startword = 2; 220190295Sstefanf if (saveall) 221215783Sjilles USTPUTC(c, p); 222190295Sstefanf continue; 223190295Sstefanf } 224190295Sstefanf } 225190295Sstefanf 226190295Sstefanf if (is_ifs == 0) { 227190295Sstefanf /* append this character to the current variable */ 228190295Sstefanf startword = 0; 229190295Sstefanf if (saveall) 230190295Sstefanf /* Not just a spare terminator */ 231190295Sstefanf saveall++; 232215783Sjilles USTPUTC(c, p); 2331556Srgrimes continue; 2341556Srgrimes } 235190295Sstefanf 236190295Sstefanf /* end of variable... */ 237190295Sstefanf startword = is_ifs; 238190295Sstefanf 239190295Sstefanf if (ap[1] == NULL) { 240190295Sstefanf /* Last variable needs all IFS chars */ 241190295Sstefanf saveall++; 242215783Sjilles USTPUTC(c, p); 243190295Sstefanf continue; 2441556Srgrimes } 245190295Sstefanf 246190295Sstefanf STACKSTRNUL(p); 247190295Sstefanf setvar(*ap, stackblock(), 0); 248190295Sstefanf ap++; 249190295Sstefanf STARTSTACKSTR(p); 2501556Srgrimes } 2511556Srgrimes STACKSTRNUL(p); 252190295Sstefanf 253190295Sstefanf /* Remove trailing IFS chars */ 254190295Sstefanf for (; stackblock() <= --p; *p = 0) { 255190295Sstefanf if (!strchr(ifs, *p)) 256190295Sstefanf break; 257190295Sstefanf if (strchr(" \t\n", *p)) 258190295Sstefanf /* Always remove whitespace */ 259190295Sstefanf continue; 260190295Sstefanf if (saveall > 1) 261190295Sstefanf /* Don't remove non-whitespace unless it was naked */ 262190295Sstefanf break; 263190295Sstefanf } 2641556Srgrimes setvar(*ap, stackblock(), 0); 265190295Sstefanf 266190295Sstefanf /* Set any remaining args to "" */ 2671556Srgrimes while (*++ap != NULL) 2681556Srgrimes setvar(*ap, nullstr, 0); 2691556Srgrimes return status; 2701556Srgrimes} 2711556Srgrimes 2721556Srgrimes 2731556Srgrimes 27417987Speterint 275201053Sjillesumaskcmd(int argc __unused, char **argv __unused) 27617987Speter{ 27717987Speter char *ap; 2781556Srgrimes int mask; 2791556Srgrimes int i; 28017987Speter int symbolic_mode = 0; 2811556Srgrimes 28217987Speter while ((i = nextopt("S")) != '\0') { 28317987Speter symbolic_mode = 1; 2841556Srgrimes } 28511571Sjoerg 28617987Speter INTOFF; 28717987Speter mask = umask(0); 28817987Speter umask(mask); 28917987Speter INTON; 29011571Sjoerg 29117987Speter if ((ap = *argptr) == NULL) { 29217987Speter if (symbolic_mode) { 29317987Speter char u[4], g[4], o[4]; 29411571Sjoerg 29517987Speter i = 0; 29617987Speter if ((mask & S_IRUSR) == 0) 29717987Speter u[i++] = 'r'; 29817987Speter if ((mask & S_IWUSR) == 0) 29917987Speter u[i++] = 'w'; 30017987Speter if ((mask & S_IXUSR) == 0) 30117987Speter u[i++] = 'x'; 30217987Speter u[i] = '\0'; 30311571Sjoerg 30417987Speter i = 0; 30517987Speter if ((mask & S_IRGRP) == 0) 30617987Speter g[i++] = 'r'; 30717987Speter if ((mask & S_IWGRP) == 0) 30817987Speter g[i++] = 'w'; 30917987Speter if ((mask & S_IXGRP) == 0) 31017987Speter g[i++] = 'x'; 31117987Speter g[i] = '\0'; 31211571Sjoerg 31317987Speter i = 0; 31417987Speter if ((mask & S_IROTH) == 0) 31517987Speter o[i++] = 'r'; 31617987Speter if ((mask & S_IWOTH) == 0) 31717987Speter o[i++] = 'w'; 31817987Speter if ((mask & S_IXOTH) == 0) 31917987Speter o[i++] = 'x'; 32017987Speter o[i] = '\0'; 32111571Sjoerg 32217987Speter out1fmt("u=%s,g=%s,o=%s\n", u, g, o); 32317987Speter } else { 32417987Speter out1fmt("%.4o\n", mask); 32517987Speter } 32617987Speter } else { 327246167Sjilles if (is_digit(*ap)) { 32817987Speter mask = 0; 32917987Speter do { 33017987Speter if (*ap >= '8' || *ap < '0') 331149918Sstefanf error("Illegal number: %s", *argptr); 33217987Speter mask = (mask << 3) + (*ap - '0'); 33317987Speter } while (*++ap != '\0'); 33417987Speter umask(mask); 33517987Speter } else { 33620425Ssteve void *set; 337151795Sstefanf INTOFF; 33817987Speter if ((set = setmode (ap)) == 0) 33941844Simp error("Illegal number: %s", ap); 34011571Sjoerg 34117987Speter mask = getmode (set, ~mask & 0777); 34217987Speter umask(~mask & 0777); 34341844Simp free(set); 344151795Sstefanf INTON; 34517987Speter } 34617987Speter } 34711571Sjoerg return 0; 34811571Sjoerg} 34911571Sjoerg 35017987Speter/* 35117987Speter * ulimit builtin 35217987Speter * 35317987Speter * This code, originally by Doug Gwyn, Doug Kingston, Eric Gisin, and 35417987Speter * Michael Rendell was ripped from pdksh 5.0.8 and hacked for use with 35517987Speter * ash by J.T. Conklin. 35617987Speter * 35717987Speter * Public domain. 35817987Speter */ 35911571Sjoerg 36017987Speterstruct limits { 36117987Speter const char *name; 36218016Speter const char *units; 36317987Speter int cmd; 36417987Speter int factor; /* multiply by to get rlim_{cur,max} values */ 36517987Speter char option; 36617987Speter}; 36711571Sjoerg 36817987Speterstatic const struct limits limits[] = { 36917987Speter#ifdef RLIMIT_CPU 37018016Speter { "cpu time", "seconds", RLIMIT_CPU, 1, 't' }, 37117987Speter#endif 37217987Speter#ifdef RLIMIT_FSIZE 37318016Speter { "file size", "512-blocks", RLIMIT_FSIZE, 512, 'f' }, 37417987Speter#endif 37517987Speter#ifdef RLIMIT_DATA 37618016Speter { "data seg size", "kbytes", RLIMIT_DATA, 1024, 'd' }, 37717987Speter#endif 37817987Speter#ifdef RLIMIT_STACK 37918016Speter { "stack size", "kbytes", RLIMIT_STACK, 1024, 's' }, 38017987Speter#endif 38117987Speter#ifdef RLIMIT_CORE 38218016Speter { "core file size", "512-blocks", RLIMIT_CORE, 512, 'c' }, 38317987Speter#endif 38417987Speter#ifdef RLIMIT_RSS 38518016Speter { "max memory size", "kbytes", RLIMIT_RSS, 1024, 'm' }, 38617987Speter#endif 38717987Speter#ifdef RLIMIT_MEMLOCK 38818016Speter { "locked memory", "kbytes", RLIMIT_MEMLOCK, 1024, 'l' }, 38917987Speter#endif 39017987Speter#ifdef RLIMIT_NPROC 39118016Speter { "max user processes", (char *)0, RLIMIT_NPROC, 1, 'u' }, 39217987Speter#endif 39317987Speter#ifdef RLIMIT_NOFILE 39418016Speter { "open files", (char *)0, RLIMIT_NOFILE, 1, 'n' }, 39517987Speter#endif 39617987Speter#ifdef RLIMIT_VMEM 39718016Speter { "virtual mem size", "kbytes", RLIMIT_VMEM, 1024, 'v' }, 39817987Speter#endif 39917987Speter#ifdef RLIMIT_SWAP 40018016Speter { "swap limit", "kbytes", RLIMIT_SWAP, 1024, 'w' }, 40117987Speter#endif 40252072Sgreen#ifdef RLIMIT_SBSIZE 40352072Sgreen { "sbsize", "bytes", RLIMIT_SBSIZE, 1, 'b' }, 40452072Sgreen#endif 405181905Sed#ifdef RLIMIT_NPTS 406181905Sed { "pseudo-terminals", (char *)0, RLIMIT_NPTS, 1, 'p' }, 407181905Sed#endif 40818016Speter { (char *) 0, (char *)0, 0, 0, '\0' } 40917987Speter}; 41017987Speter 41117987Speterint 41290111Simpulimitcmd(int argc __unused, char **argv __unused) 41317987Speter{ 41425222Ssteve int c; 415104282Smux rlim_t val = 0; 41617987Speter enum { SOFT = 0x1, HARD = 0x2 } 41717987Speter how = SOFT | HARD; 41817987Speter const struct limits *l; 41917987Speter int set, all = 0; 42017987Speter int optc, what; 42117987Speter struct rlimit limit; 42211571Sjoerg 42317987Speter what = 'f'; 424194767Skib while ((optc = nextopt("HSatfdsmcnuvlbpw")) != '\0') 42517987Speter switch (optc) { 42611571Sjoerg case 'H': 42717987Speter how = HARD; 42811571Sjoerg break; 42911571Sjoerg case 'S': 43017987Speter how = SOFT; 43111571Sjoerg break; 43211571Sjoerg case 'a': 43317987Speter all = 1; 43411571Sjoerg break; 43517987Speter default: 43617987Speter what = optc; 43711571Sjoerg } 43811571Sjoerg 43917987Speter for (l = limits; l->name && l->option != what; l++) 44017987Speter ; 44117987Speter if (!l->name) 442104208Stjr error("internal error (%c)", what); 44317987Speter 44417987Speter set = *argptr ? 1 : 0; 44517987Speter if (set) { 44617987Speter char *p = *argptr; 44717987Speter 44817987Speter if (all || argptr[1]) 449104208Stjr error("too many arguments"); 45017987Speter if (strcmp(p, "unlimited") == 0) 45111571Sjoerg val = RLIM_INFINITY; 45211571Sjoerg else { 453104282Smux val = 0; 45417987Speter 45517987Speter while ((c = *p++) >= '0' && c <= '9') 45617987Speter { 45717987Speter val = (val * 10) + (long)(c - '0'); 458104282Smux if (val < 0) 45917987Speter break; 46017987Speter } 46117987Speter if (c) 462104208Stjr error("bad number"); 46317987Speter val *= l->factor; 46411571Sjoerg } 46517987Speter } 46617987Speter if (all) { 467155301Sschweikh for (l = limits; l->name; l++) { 46818016Speter char optbuf[40]; 46918016Speter if (getrlimit(l->cmd, &limit) < 0) 470104208Stjr error("can't get limit: %s", strerror(errno)); 47117987Speter if (how & SOFT) 47217987Speter val = limit.rlim_cur; 47317987Speter else if (how & HARD) 47417987Speter val = limit.rlim_max; 47517987Speter 47618016Speter if (l->units) 47718016Speter snprintf(optbuf, sizeof(optbuf), 47818019Speter "(%s, -%c) ", l->units, l->option); 47918016Speter else 48018016Speter snprintf(optbuf, sizeof(optbuf), 48118019Speter "(-%c) ", l->option); 48218019Speter out1fmt("%-18s %18s ", l->name, optbuf); 48317987Speter if (val == RLIM_INFINITY) 484221975Sjilles out1str("unlimited\n"); 48517987Speter else 48617987Speter { 48717987Speter val /= l->factor; 488104282Smux out1fmt("%jd\n", (intmax_t)val); 48917987Speter } 49011571Sjoerg } 49117987Speter return 0; 49211571Sjoerg } 49317987Speter 49418016Speter if (getrlimit(l->cmd, &limit) < 0) 495104208Stjr error("can't get limit: %s", strerror(errno)); 49617987Speter if (set) { 49717987Speter if (how & SOFT) 49817987Speter limit.rlim_cur = val; 49917987Speter if (how & HARD) 50017987Speter limit.rlim_max = val; 50117987Speter if (setrlimit(l->cmd, &limit) < 0) 502104208Stjr error("bad limit: %s", strerror(errno)); 50317987Speter } else { 50417987Speter if (how & SOFT) 50517987Speter val = limit.rlim_cur; 50617987Speter else if (how & HARD) 50717987Speter val = limit.rlim_max; 50817987Speter 50917987Speter if (val == RLIM_INFINITY) 510221975Sjilles out1str("unlimited\n"); 51117987Speter else 51217987Speter { 51317987Speter val /= l->factor; 514104282Smux out1fmt("%jd\n", (intmax_t)val); 51517987Speter } 51617987Speter } 51711571Sjoerg return 0; 51811571Sjoerg} 519