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 * 4. Neither the name of the University nor the names of its contributors 171590Srgrimes * may be used to endorse or promote products derived from this software 181590Srgrimes * without specific prior written permission. 191590Srgrimes * 201590Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 211590Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 221590Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 231590Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 241590Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 251590Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 261590Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 271590Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 281590Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 291590Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 301590Srgrimes * SUCH DAMAGE. 311590Srgrimes */ 321590Srgrimes 3387628Sdwmalone#if 0 3487628Sdwmalone#ifndef lint 3587628Sdwmalonestatic char sccsid[] = "@(#)apply.c 8.4 (Berkeley) 4/4/94"; 3687628Sdwmalone#endif 3787628Sdwmalone#endif 3887628Sdwmalone 3987231Smarkm#include <sys/cdefs.h> 4087231Smarkm__FBSDID("$FreeBSD: stable/11/usr.bin/apply/apply.c 337825 2018-08-15 01:24:43Z kevans $"); 4187231Smarkm 4267189Sbrian#include <sys/types.h> 43204761Sjh#include <sys/sbuf.h> 441590Srgrimes#include <sys/wait.h> 451590Srgrimes 461590Srgrimes#include <ctype.h> 471590Srgrimes#include <err.h> 48204761Sjh#include <errno.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 56337825Skevans#define ISMAGICNO(p) \ 57337825Skevans (p)[0] == magic && isdigit((unsigned char)(p)[1]) && (p)[1] != '0' 581590Srgrimes 59245048Sdelphijstatic int exec_shell(const char *, const char *, const char *); 6071326Swillstatic void usage(void); 6170692Swill 621590Srgrimesint 63204761Sjhmain(int argc, char *argv[]) 64204761Sjh{ 65204761Sjh struct sbuf *cmdbuf; 66204761Sjh long arg_max; 67337825Skevans int ch, debug, i, magic, n, nargs, rval; 68204761Sjh size_t cmdsize; 69337825Skevans char buf[4]; 70204761Sjh char *cmd, *name, *p, *shell, *slashp, *tmpshell; 711590Srgrimes 721590Srgrimes debug = 0; 731590Srgrimes magic = '%'; /* Default magic char is `%'. */ 741590Srgrimes nargs = -1; 7570672Swill while ((ch = getopt(argc, argv, "a:d0123456789")) != -1) 761590Srgrimes switch (ch) { 771590Srgrimes case 'a': 78337825Skevans if (optarg[0] == '\0' || optarg[1] != '\0') 791590Srgrimes errx(1, 8054157Scharnier "illegal magic character specification"); 811590Srgrimes magic = optarg[0]; 821590Srgrimes break; 831590Srgrimes case 'd': 841590Srgrimes debug = 1; 851590Srgrimes break; 861590Srgrimes case '0': case '1': case '2': case '3': case '4': 871590Srgrimes case '5': case '6': case '7': case '8': case '9': 881590Srgrimes if (nargs != -1) 891590Srgrimes errx(1, 9054157Scharnier "only one -# argument may be specified"); 911590Srgrimes nargs = optopt - '0'; 921590Srgrimes break; 931590Srgrimes default: 941590Srgrimes usage(); 951590Srgrimes } 961590Srgrimes argc -= optind; 971590Srgrimes argv += optind; 981590Srgrimes 991590Srgrimes if (argc < 2) 1001590Srgrimes usage(); 1011590Srgrimes 1021590Srgrimes /* 1031590Srgrimes * The command to run is argv[0], and the args are argv[1..]. 1041590Srgrimes * Look for %digit references in the command, remembering the 1051590Srgrimes * largest one. 1061590Srgrimes */ 1071590Srgrimes for (n = 0, p = argv[0]; *p != '\0'; ++p) 108337825Skevans if (ISMAGICNO(p)) { 1091590Srgrimes ++p; 1101590Srgrimes if (p[0] - '0' > n) 1111590Srgrimes n = p[0] - '0'; 1121590Srgrimes } 1131590Srgrimes 1141590Srgrimes /* 11570692Swill * Figure out the shell and name arguments to pass to execl() 11670692Swill * in exec_shell(). Always malloc() shell and just set name 11770692Swill * to point at the last part of shell if there are any backslashes, 11870692Swill * otherwise just set it to point at the space malloc()'d. If 11970692Swill * SHELL environment variable exists, replace contents of 12070692Swill * shell with it. 12170692Swill */ 12270692Swill shell = name = NULL; 12370692Swill tmpshell = getenv("SHELL"); 12470692Swill shell = (tmpshell != NULL) ? strdup(tmpshell) : strdup(_PATH_BSHELL); 12570692Swill if (shell == NULL) 12670692Swill err(1, "strdup() failed"); 12770692Swill slashp = strrchr(shell, '/'); 12870692Swill name = (slashp != NULL) ? slashp + 1 : shell; 12970692Swill 13070692Swill /* 1311590Srgrimes * If there were any %digit references, then use those, otherwise 1321590Srgrimes * build a new command string with sufficient %digit references at 1331590Srgrimes * the end to consume (nargs) arguments each time round the loop. 13470692Swill * Allocate enough space to hold the maximum command. Save the 13570692Swill * size to pass to snprintf(). 1361590Srgrimes */ 137337825Skevans if (n == 0) { 138337825Skevans cmdsize = strlen(argv[0]) + 9 * (sizeof(" %1") - 1) + 1; 139337825Skevans if ((cmd = malloc(cmdsize)) == NULL) 140337825Skevans err(1, NULL); 141337825Skevans strlcpy(cmd, argv[0], cmdsize); 1428874Srgrimes 1431590Srgrimes /* If nargs not set, default to a single argument. */ 1441590Srgrimes if (nargs == -1) 1451590Srgrimes nargs = 1; 1461590Srgrimes 14770692Swill for (i = 1; i <= nargs; i++) { 148337825Skevans snprintf(buf, sizeof(buf), " %c%d", magic, i); 149337825Skevans strlcat(cmd, buf, cmdsize); 15070692Swill } 1511590Srgrimes 1521590Srgrimes /* 1531590Srgrimes * If nargs set to the special value 0, eat a single 1541590Srgrimes * argument for each command execution. 1551590Srgrimes */ 1561590Srgrimes if (nargs == 0) 1571590Srgrimes nargs = 1; 1581590Srgrimes } else { 159337825Skevans if ((cmd = strdup(argv[0])) == NULL) 160337825Skevans err(1, NULL); 1611590Srgrimes nargs = n; 1621590Srgrimes } 1631590Srgrimes 164204761Sjh cmdbuf = sbuf_new(NULL, NULL, 1024, SBUF_AUTOEXTEND); 165204761Sjh if (cmdbuf == NULL) 1661590Srgrimes err(1, NULL); 1671590Srgrimes 168204761Sjh arg_max = sysconf(_SC_ARG_MAX); 169204761Sjh 1701590Srgrimes /* 1711590Srgrimes * (argc) and (argv) are still offset by one to make it simpler to 1721590Srgrimes * expand %digit references. At the end of the loop check for (argc) 1731590Srgrimes * equals 1 means that all the (argv) has been consumed. 1741590Srgrimes */ 1751590Srgrimes for (rval = 0; argc > nargs; argc -= nargs, argv += nargs) { 176204761Sjh sbuf_clear(cmdbuf); 177337825Skevans sbuf_cat(cmdbuf, "exec "); 1781590Srgrimes /* Expand command argv references. */ 179204761Sjh for (p = cmd; *p != '\0'; ++p) { 180337825Skevans if (ISMAGICNO(p)) { 181204761Sjh if (sbuf_cat(cmdbuf, argv[(++p)[0] - '0']) 182204761Sjh == -1) 183204761Sjh errc(1, ENOMEM, "sbuf"); 184204761Sjh } else { 185204761Sjh if (sbuf_putc(cmdbuf, *p) == -1) 186204761Sjh errc(1, ENOMEM, "sbuf"); 187204761Sjh } 188204761Sjh if (sbuf_len(cmdbuf) > arg_max) 189204761Sjh errc(1, E2BIG, NULL); 190204761Sjh } 1911590Srgrimes 1921590Srgrimes /* Terminate the command string. */ 193204761Sjh sbuf_finish(cmdbuf); 1941590Srgrimes 1951590Srgrimes /* Run the command. */ 1961590Srgrimes if (debug) 197204761Sjh (void)printf("%s\n", sbuf_data(cmdbuf)); 1981590Srgrimes else 199204761Sjh if (exec_shell(sbuf_data(cmdbuf), shell, name)) 2001590Srgrimes rval = 1; 2011590Srgrimes } 2021590Srgrimes 2031590Srgrimes if (argc != 1) 2041590Srgrimes errx(1, "expecting additional argument%s after \"%s\"", 205204761Sjh (nargs - argc) ? "s" : "", argv[argc - 1]); 20670692Swill free(cmd); 207204761Sjh sbuf_delete(cmdbuf); 20870692Swill free(shell); 2091590Srgrimes exit(rval); 2101590Srgrimes} 2111590Srgrimes 2121590Srgrimes/* 21370692Swill * exec_shell -- 21470692Swill * Execute a shell command using passed use_shell and use_name 21570692Swill * arguments. 2161590Srgrimes */ 21770692Swillstatic int 218245048Sdelphijexec_shell(const char *command, const char *use_shell, const char *use_name) 2191590Srgrimes{ 2201590Srgrimes pid_t pid; 22143928Seivind int omask, pstat; 2221590Srgrimes sig_t intsave, quitsave; 2231590Srgrimes 22470672Swill if (!command) /* just checking... */ 2251590Srgrimes return(1); 2261590Srgrimes 2271590Srgrimes omask = sigblock(sigmask(SIGCHLD)); 22860706Skris switch(pid = vfork()) { 2291590Srgrimes case -1: /* error */ 23060706Skris err(1, "vfork"); 2311590Srgrimes case 0: /* child */ 2321590Srgrimes (void)sigsetmask(omask); 23379452Sbrian execl(use_shell, use_name, "-c", command, (char *)NULL); 23470692Swill warn("%s", use_shell); 23560706Skris _exit(1); 2361590Srgrimes } 2371590Srgrimes intsave = signal(SIGINT, SIG_IGN); 2381590Srgrimes quitsave = signal(SIGQUIT, SIG_IGN); 23943928Seivind pid = waitpid(pid, &pstat, 0); 2401590Srgrimes (void)sigsetmask(omask); 2411590Srgrimes (void)signal(SIGINT, intsave); 2421590Srgrimes (void)signal(SIGQUIT, quitsave); 24343928Seivind return(pid == -1 ? -1 : pstat); 2441590Srgrimes} 2451590Srgrimes 246245048Sdelphijstatic void 24799984Salfredusage(void) 2481590Srgrimes{ 2491590Srgrimes 2501590Srgrimes (void)fprintf(stderr, 25170672Swill "usage: apply [-a magic] [-d] [-0123456789] command arguments ...\n"); 2521590Srgrimes exit(1); 2531590Srgrimes} 254