apply.c revision 67189
11590Srgrimes/*- 21590Srgrimes * Copyright (c) 1994 31590Srgrimes * The Regents of the University of California. All rights reserved. 41590Srgrimes * 51590Srgrimes * This code is derived from software contributed to Berkeley by 61590Srgrimes * Jan-Simon Pendry. 71590Srgrimes * 81590Srgrimes * Redistribution and use in source and binary forms, with or without 91590Srgrimes * modification, are permitted provided that the following conditions 101590Srgrimes * are met: 111590Srgrimes * 1. Redistributions of source code must retain the above copyright 121590Srgrimes * notice, this list of conditions and the following disclaimer. 131590Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 141590Srgrimes * notice, this list of conditions and the following disclaimer in the 151590Srgrimes * documentation and/or other materials provided with the distribution. 161590Srgrimes * 3. All advertising materials mentioning features or use of this software 171590Srgrimes * must display the following acknowledgement: 181590Srgrimes * This product includes software developed by the University of 191590Srgrimes * California, Berkeley and its contributors. 201590Srgrimes * 4. Neither the name of the University nor the names of its contributors 211590Srgrimes * may be used to endorse or promote products derived from this software 221590Srgrimes * without specific prior written permission. 231590Srgrimes * 241590Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 251590Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 261590Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 271590Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 281590Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 291590Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 301590Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 311590Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 321590Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 331590Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 341590Srgrimes * SUCH DAMAGE. 351590Srgrimes */ 361590Srgrimes 371590Srgrimes#ifndef lint 3854113Skris#if 0 3941568Sarchiestatic const char sccsid[] = "@(#)apply.c 8.4 (Berkeley) 4/4/94"; 4054113Skris#endif 4154113Skrisstatic const char rcsid[] = 4254113Skris "$FreeBSD: head/usr.bin/apply/apply.c 67189 2000-10-16 08:13:59Z brian $"; 431590Srgrimes#endif /* not lint */ 441590Srgrimes 4567189Sbrian#include <sys/types.h> 4667189Sbrian 471590Srgrimes#include <sys/wait.h> 481590Srgrimes 491590Srgrimes#include <ctype.h> 501590Srgrimes#include <err.h> 511590Srgrimes#include <paths.h> 521590Srgrimes#include <signal.h> 531590Srgrimes#include <stdio.h> 541590Srgrimes#include <stdlib.h> 551590Srgrimes#include <string.h> 561590Srgrimes#include <unistd.h> 571590Srgrimes 581590Srgrimesvoid usage __P((void)); 591590Srgrimesint system __P((const char *)); 601590Srgrimes 611590Srgrimesint 621590Srgrimesmain(argc, argv) 631590Srgrimes int argc; 641590Srgrimes char *argv[]; 651590Srgrimes{ 661590Srgrimes int ch, clen, debug, i, l, magic, n, nargs, rval; 671590Srgrimes char *c, *cmd, *p, *q; 681590Srgrimes 691590Srgrimes debug = 0; 701590Srgrimes magic = '%'; /* Default magic char is `%'. */ 711590Srgrimes nargs = -1; 7224360Simp while ((ch = getopt(argc, argv, "a:d0123456789")) != -1) 731590Srgrimes switch (ch) { 741590Srgrimes case 'a': 751590Srgrimes if (optarg[1] != '\0') 761590Srgrimes errx(1, 7754157Scharnier "illegal magic character specification"); 781590Srgrimes magic = optarg[0]; 791590Srgrimes break; 801590Srgrimes case 'd': 811590Srgrimes debug = 1; 821590Srgrimes break; 831590Srgrimes case '0': case '1': case '2': case '3': case '4': 841590Srgrimes case '5': case '6': case '7': case '8': case '9': 851590Srgrimes if (nargs != -1) 861590Srgrimes errx(1, 8754157Scharnier "only one -# argument may be specified"); 881590Srgrimes nargs = optopt - '0'; 891590Srgrimes break; 901590Srgrimes default: 911590Srgrimes usage(); 921590Srgrimes } 931590Srgrimes argc -= optind; 941590Srgrimes argv += optind; 951590Srgrimes 961590Srgrimes if (argc < 2) 971590Srgrimes usage(); 981590Srgrimes 991590Srgrimes /* 1001590Srgrimes * The command to run is argv[0], and the args are argv[1..]. 1011590Srgrimes * Look for %digit references in the command, remembering the 1021590Srgrimes * largest one. 1031590Srgrimes */ 1041590Srgrimes for (n = 0, p = argv[0]; *p != '\0'; ++p) 1051590Srgrimes if (p[0] == magic && isdigit(p[1]) && p[1] != '0') { 1061590Srgrimes ++p; 1071590Srgrimes if (p[0] - '0' > n) 1081590Srgrimes n = p[0] - '0'; 1091590Srgrimes } 1101590Srgrimes 1111590Srgrimes /* 1121590Srgrimes * If there were any %digit references, then use those, otherwise 1131590Srgrimes * build a new command string with sufficient %digit references at 1141590Srgrimes * the end to consume (nargs) arguments each time round the loop. 1151590Srgrimes * Allocate enough space to hold the maximum command. 1161590Srgrimes */ 1171590Srgrimes if ((cmd = malloc(sizeof("exec ") - 1 + 1181590Srgrimes strlen(argv[0]) + 9 * (sizeof(" %1") - 1) + 1)) == NULL) 1191590Srgrimes err(1, NULL); 1208874Srgrimes 1211590Srgrimes if (n == 0) { 1221590Srgrimes /* If nargs not set, default to a single argument. */ 1231590Srgrimes if (nargs == -1) 1241590Srgrimes nargs = 1; 1251590Srgrimes 1261590Srgrimes p = cmd; 1271590Srgrimes p += sprintf(cmd, "exec %s", argv[0]); 1281590Srgrimes for (i = 1; i <= nargs; i++) 1291590Srgrimes p += sprintf(p, " %c%d", magic, i); 1301590Srgrimes 1311590Srgrimes /* 1321590Srgrimes * If nargs set to the special value 0, eat a single 1331590Srgrimes * argument for each command execution. 1341590Srgrimes */ 1351590Srgrimes if (nargs == 0) 1361590Srgrimes nargs = 1; 1371590Srgrimes } else { 1381590Srgrimes (void)sprintf(cmd, "exec %s", argv[0]); 1391590Srgrimes nargs = n; 1401590Srgrimes } 1411590Srgrimes 1421590Srgrimes /* 1431590Srgrimes * Grab some space in which to build the command. Allocate 1441590Srgrimes * as necessary later, but no reason to build it up slowly 1451590Srgrimes * for the normal case. 1461590Srgrimes */ 1471590Srgrimes if ((c = malloc(clen = 1024)) == NULL) 1481590Srgrimes err(1, NULL); 1491590Srgrimes 1501590Srgrimes /* 1511590Srgrimes * (argc) and (argv) are still offset by one to make it simpler to 1521590Srgrimes * expand %digit references. At the end of the loop check for (argc) 1531590Srgrimes * equals 1 means that all the (argv) has been consumed. 1541590Srgrimes */ 1551590Srgrimes for (rval = 0; argc > nargs; argc -= nargs, argv += nargs) { 1561590Srgrimes /* 1571590Srgrimes * Find a max value for the command length, and ensure 1581590Srgrimes * there's enough space to build it. 1591590Srgrimes */ 1601590Srgrimes for (l = strlen(cmd), i = 0; i < nargs; i++) 16154113Skris l += strlen(argv[i+1]); 1621590Srgrimes if (l > clen && (c = realloc(c, clen = l)) == NULL) 1631590Srgrimes err(1, NULL); 1641590Srgrimes 1651590Srgrimes /* Expand command argv references. */ 1661590Srgrimes for (p = cmd, q = c; *p != '\0'; ++p) 1671590Srgrimes if (p[0] == magic && isdigit(p[1]) && p[1] != '0') 1681590Srgrimes q += sprintf(q, "%s", argv[(++p)[0] - '0']); 1691590Srgrimes else 1701590Srgrimes *q++ = *p; 1711590Srgrimes 1721590Srgrimes /* Terminate the command string. */ 1731590Srgrimes *q = '\0'; 1741590Srgrimes 1751590Srgrimes /* Run the command. */ 1761590Srgrimes if (debug) 1771590Srgrimes (void)printf("%s\n", c); 1781590Srgrimes else 1791590Srgrimes if (system(c)) 1801590Srgrimes rval = 1; 1811590Srgrimes } 1821590Srgrimes 1831590Srgrimes if (argc != 1) 1841590Srgrimes errx(1, "expecting additional argument%s after \"%s\"", 1851590Srgrimes (nargs - argc) ? "s" : "", argv[argc - 1]); 1861590Srgrimes exit(rval); 1871590Srgrimes} 1881590Srgrimes 1891590Srgrimes/* 1901590Srgrimes * system -- 1911590Srgrimes * Private version of system(3). Use the user's SHELL environment 1921590Srgrimes * variable as the shell to execute. 1931590Srgrimes */ 1941590Srgrimesint 1951590Srgrimessystem(command) 1961590Srgrimes const char *command; 1971590Srgrimes{ 1981590Srgrimes static char *name, *shell; 1991590Srgrimes pid_t pid; 20043928Seivind int omask, pstat; 2011590Srgrimes sig_t intsave, quitsave; 2021590Srgrimes 2031590Srgrimes if (shell == NULL) { 2041590Srgrimes if ((shell = getenv("SHELL")) == NULL) 2051590Srgrimes shell = _PATH_BSHELL; 2061590Srgrimes if ((name = strrchr(shell, '/')) == NULL) 2071590Srgrimes name = shell; 2081590Srgrimes else 2091590Srgrimes ++name; 2101590Srgrimes } 2111590Srgrimes if (!command) /* just checking... */ 2121590Srgrimes return(1); 2131590Srgrimes 2141590Srgrimes omask = sigblock(sigmask(SIGCHLD)); 21560706Skris switch(pid = vfork()) { 2161590Srgrimes case -1: /* error */ 21760706Skris err(1, "vfork"); 2181590Srgrimes case 0: /* child */ 2191590Srgrimes (void)sigsetmask(omask); 2201590Srgrimes execl(shell, name, "-c", command, NULL); 22160706Skris warn("%s", shell); 22260706Skris _exit(1); 2231590Srgrimes } 2241590Srgrimes intsave = signal(SIGINT, SIG_IGN); 2251590Srgrimes quitsave = signal(SIGQUIT, SIG_IGN); 22643928Seivind pid = waitpid(pid, &pstat, 0); 2271590Srgrimes (void)sigsetmask(omask); 2281590Srgrimes (void)signal(SIGINT, intsave); 2291590Srgrimes (void)signal(SIGQUIT, quitsave); 23043928Seivind return(pid == -1 ? -1 : pstat); 2311590Srgrimes} 2321590Srgrimes 2331590Srgrimesvoid 2341590Srgrimesusage() 2351590Srgrimes{ 2361590Srgrimes 2371590Srgrimes (void)fprintf(stderr, 23854157Scharnier "usage: apply [-a magic] [-d] [-0123456789] command arguments ...\n"); 2391590Srgrimes exit(1); 2401590Srgrimes} 241