apply.c revision 54157
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 54157 1999-12-05 19:53:37Z charnier $"; 431590Srgrimes#endif /* not lint */ 441590Srgrimes 451590Srgrimes#include <sys/wait.h> 461590Srgrimes 471590Srgrimes#include <ctype.h> 481590Srgrimes#include <err.h> 491590Srgrimes#include <paths.h> 501590Srgrimes#include <signal.h> 511590Srgrimes#include <stdio.h> 521590Srgrimes#include <stdlib.h> 531590Srgrimes#include <string.h> 541590Srgrimes#include <unistd.h> 551590Srgrimes 561590Srgrimesvoid usage __P((void)); 571590Srgrimesint system __P((const char *)); 581590Srgrimes 591590Srgrimesint 601590Srgrimesmain(argc, argv) 611590Srgrimes int argc; 621590Srgrimes char *argv[]; 631590Srgrimes{ 641590Srgrimes int ch, clen, debug, i, l, magic, n, nargs, rval; 651590Srgrimes char *c, *cmd, *p, *q; 661590Srgrimes 671590Srgrimes debug = 0; 681590Srgrimes magic = '%'; /* Default magic char is `%'. */ 691590Srgrimes nargs = -1; 7024360Simp while ((ch = getopt(argc, argv, "a:d0123456789")) != -1) 711590Srgrimes switch (ch) { 721590Srgrimes case 'a': 731590Srgrimes if (optarg[1] != '\0') 741590Srgrimes errx(1, 7554157Scharnier "illegal magic character specification"); 761590Srgrimes magic = optarg[0]; 771590Srgrimes break; 781590Srgrimes case 'd': 791590Srgrimes debug = 1; 801590Srgrimes break; 811590Srgrimes case '0': case '1': case '2': case '3': case '4': 821590Srgrimes case '5': case '6': case '7': case '8': case '9': 831590Srgrimes if (nargs != -1) 841590Srgrimes errx(1, 8554157Scharnier "only one -# argument may be specified"); 861590Srgrimes nargs = optopt - '0'; 871590Srgrimes break; 881590Srgrimes default: 891590Srgrimes usage(); 901590Srgrimes } 911590Srgrimes argc -= optind; 921590Srgrimes argv += optind; 931590Srgrimes 941590Srgrimes if (argc < 2) 951590Srgrimes usage(); 961590Srgrimes 971590Srgrimes /* 981590Srgrimes * The command to run is argv[0], and the args are argv[1..]. 991590Srgrimes * Look for %digit references in the command, remembering the 1001590Srgrimes * largest one. 1011590Srgrimes */ 1021590Srgrimes for (n = 0, p = argv[0]; *p != '\0'; ++p) 1031590Srgrimes if (p[0] == magic && isdigit(p[1]) && p[1] != '0') { 1041590Srgrimes ++p; 1051590Srgrimes if (p[0] - '0' > n) 1061590Srgrimes n = p[0] - '0'; 1071590Srgrimes } 1081590Srgrimes 1091590Srgrimes /* 1101590Srgrimes * If there were any %digit references, then use those, otherwise 1111590Srgrimes * build a new command string with sufficient %digit references at 1121590Srgrimes * the end to consume (nargs) arguments each time round the loop. 1131590Srgrimes * Allocate enough space to hold the maximum command. 1141590Srgrimes */ 1151590Srgrimes if ((cmd = malloc(sizeof("exec ") - 1 + 1161590Srgrimes strlen(argv[0]) + 9 * (sizeof(" %1") - 1) + 1)) == NULL) 1171590Srgrimes err(1, NULL); 1188874Srgrimes 1191590Srgrimes if (n == 0) { 1201590Srgrimes /* If nargs not set, default to a single argument. */ 1211590Srgrimes if (nargs == -1) 1221590Srgrimes nargs = 1; 1231590Srgrimes 1241590Srgrimes p = cmd; 1251590Srgrimes p += sprintf(cmd, "exec %s", argv[0]); 1261590Srgrimes for (i = 1; i <= nargs; i++) 1271590Srgrimes p += sprintf(p, " %c%d", magic, i); 1281590Srgrimes 1291590Srgrimes /* 1301590Srgrimes * If nargs set to the special value 0, eat a single 1311590Srgrimes * argument for each command execution. 1321590Srgrimes */ 1331590Srgrimes if (nargs == 0) 1341590Srgrimes nargs = 1; 1351590Srgrimes } else { 1361590Srgrimes (void)sprintf(cmd, "exec %s", argv[0]); 1371590Srgrimes nargs = n; 1381590Srgrimes } 1391590Srgrimes 1401590Srgrimes /* 1411590Srgrimes * Grab some space in which to build the command. Allocate 1421590Srgrimes * as necessary later, but no reason to build it up slowly 1431590Srgrimes * for the normal case. 1441590Srgrimes */ 1451590Srgrimes if ((c = malloc(clen = 1024)) == NULL) 1461590Srgrimes err(1, NULL); 1471590Srgrimes 1481590Srgrimes /* 1491590Srgrimes * (argc) and (argv) are still offset by one to make it simpler to 1501590Srgrimes * expand %digit references. At the end of the loop check for (argc) 1511590Srgrimes * equals 1 means that all the (argv) has been consumed. 1521590Srgrimes */ 1531590Srgrimes for (rval = 0; argc > nargs; argc -= nargs, argv += nargs) { 1541590Srgrimes /* 1551590Srgrimes * Find a max value for the command length, and ensure 1561590Srgrimes * there's enough space to build it. 1571590Srgrimes */ 1581590Srgrimes for (l = strlen(cmd), i = 0; i < nargs; i++) 15954113Skris l += strlen(argv[i+1]); 1601590Srgrimes if (l > clen && (c = realloc(c, clen = l)) == NULL) 1611590Srgrimes err(1, NULL); 1621590Srgrimes 1631590Srgrimes /* Expand command argv references. */ 1641590Srgrimes for (p = cmd, q = c; *p != '\0'; ++p) 1651590Srgrimes if (p[0] == magic && isdigit(p[1]) && p[1] != '0') 1661590Srgrimes q += sprintf(q, "%s", argv[(++p)[0] - '0']); 1671590Srgrimes else 1681590Srgrimes *q++ = *p; 1691590Srgrimes 1701590Srgrimes /* Terminate the command string. */ 1711590Srgrimes *q = '\0'; 1721590Srgrimes 1731590Srgrimes /* Run the command. */ 1741590Srgrimes if (debug) 1751590Srgrimes (void)printf("%s\n", c); 1761590Srgrimes else 1771590Srgrimes if (system(c)) 1781590Srgrimes rval = 1; 1791590Srgrimes } 1801590Srgrimes 1811590Srgrimes if (argc != 1) 1821590Srgrimes errx(1, "expecting additional argument%s after \"%s\"", 1831590Srgrimes (nargs - argc) ? "s" : "", argv[argc - 1]); 1841590Srgrimes exit(rval); 1851590Srgrimes} 1861590Srgrimes 1871590Srgrimes/* 1881590Srgrimes * system -- 1891590Srgrimes * Private version of system(3). Use the user's SHELL environment 1901590Srgrimes * variable as the shell to execute. 1911590Srgrimes */ 1921590Srgrimesint 1931590Srgrimessystem(command) 1941590Srgrimes const char *command; 1951590Srgrimes{ 1961590Srgrimes static char *name, *shell; 1971590Srgrimes pid_t pid; 19843928Seivind int omask, pstat; 1991590Srgrimes sig_t intsave, quitsave; 2001590Srgrimes 2011590Srgrimes if (shell == NULL) { 2021590Srgrimes if ((shell = getenv("SHELL")) == NULL) 2031590Srgrimes shell = _PATH_BSHELL; 2041590Srgrimes if ((name = strrchr(shell, '/')) == NULL) 2051590Srgrimes name = shell; 2061590Srgrimes else 2071590Srgrimes ++name; 2081590Srgrimes } 2091590Srgrimes if (!command) /* just checking... */ 2101590Srgrimes return(1); 2111590Srgrimes 2121590Srgrimes omask = sigblock(sigmask(SIGCHLD)); 21340301Sdes switch(pid = fork()) { 2141590Srgrimes case -1: /* error */ 2151590Srgrimes err(1, "fork"); 2161590Srgrimes case 0: /* child */ 2171590Srgrimes (void)sigsetmask(omask); 2181590Srgrimes execl(shell, name, "-c", command, NULL); 2191590Srgrimes err(1, "%s", shell); 2201590Srgrimes } 2211590Srgrimes intsave = signal(SIGINT, SIG_IGN); 2221590Srgrimes quitsave = signal(SIGQUIT, SIG_IGN); 22343928Seivind pid = waitpid(pid, &pstat, 0); 2241590Srgrimes (void)sigsetmask(omask); 2251590Srgrimes (void)signal(SIGINT, intsave); 2261590Srgrimes (void)signal(SIGQUIT, quitsave); 22743928Seivind return(pid == -1 ? -1 : pstat); 2281590Srgrimes} 2291590Srgrimes 2301590Srgrimesvoid 2311590Srgrimesusage() 2321590Srgrimes{ 2331590Srgrimes 2341590Srgrimes (void)fprintf(stderr, 23554157Scharnier "usage: apply [-a magic] [-d] [-0123456789] command arguments ...\n"); 2361590Srgrimes exit(1); 2371590Srgrimes} 238