/*-
* SPDX-License-Identifier: BSD-3-Clause
*
* Copyright (c) 1994
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Jan-Simon Pendry.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#if 0
#ifndef lint
static char sccsid[] = "@(#)apply.c 8.4 (Berkeley) 4/4/94";
#endif
#endif
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/types.h>
#include <sys/sbuf.h>
#include <sys/wait.h>
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <paths.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#define ISMAGICNO(p) \
(p)[0] == magic && isdigit((unsigned char)(p)[1]) && (p)[1] != '0'
static int exec_shell(const char *, const char *, const char *);
static void usage(void);
int
main(int argc, char *argv[])
{
struct sbuf *cmdbuf;
long arg_max;
int ch, debug, i, magic, n, nargs, rval;
size_t cmdsize;
char buf[4];
char *cmd, *name, *p, *shell, *slashp, *tmpshell;
debug = 0;
magic = '%'; /* Default magic char is `%'. */
nargs = -1;
while ((ch = getopt(argc, argv, "a:d0123456789")) != -1)
switch (ch) {
case 'a':
if (optarg[0] == '\0' || optarg[1] != '\0')
errx(1,
"illegal magic character specification");
magic = optarg[0];
break;
case 'd':
debug = 1;
break;
case '0': case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
if (nargs != -1)
errx(1,
"only one -# argument may be specified");
nargs = optopt - '0';
break;
default:
usage();
}
argc -= optind;
argv += optind;
if (argc < 2)
usage();
/*
* The command to run is argv[0], and the args are argv[1..].
* Look for %digit references in the command, remembering the
* largest one.
*/
for (n = 0, p = argv[0]; *p != '\0'; ++p)
if (ISMAGICNO(p)) {
++p;
if (p[0] - '0' > n)
n = p[0] - '0';
}
/*
* Figure out the shell and name arguments to pass to execl()
* in exec_shell(). Always malloc() shell and just set name
* to point at the last part of shell if there are any backslashes,
* otherwise just set it to point at the space malloc()'d. If
* SHELL environment variable exists, replace contents of
* shell with it.
*/
shell = name = NULL;
tmpshell = getenv("SHELL");
shell = (tmpshell != NULL) ? strdup(tmpshell) : strdup(_PATH_BSHELL);
if (shell == NULL)
err(1, "strdup() failed");
slashp = strrchr(shell, '/');
name = (slashp != NULL) ? slashp + 1 : shell;
/*
* If there were any %digit references, then use those, otherwise
* build a new command string with sufficient %digit references at
* the end to consume (nargs) arguments each time round the loop.
* Allocate enough space to hold the maximum command. Save the
* size to pass to snprintf().
*/
if (n == 0) {
cmdsize = strlen(argv[0]) + 9 * (sizeof(" %1") - 1) + 1;
if ((cmd = malloc(cmdsize)) == NULL)
err(1, NULL);
strlcpy(cmd, argv[0], cmdsize);
/* If nargs not set, default to a single argument. */
if (nargs == -1)
nargs = 1;
for (i = 1; i <= nargs; i++) {
snprintf(buf, sizeof(buf), " %c%d", magic, i);
strlcat(cmd, buf, cmdsize);
}
/*
* If nargs set to the special value 0, eat a single
* argument for each command execution.
*/
if (nargs == 0)
nargs = 1;
} else {
if ((cmd = strdup(argv[0])) == NULL)
err(1, NULL);
nargs = n;
}
cmdbuf = sbuf_new(NULL, NULL, 1024, SBUF_AUTOEXTEND);
if (cmdbuf == NULL)
err(1, NULL);
arg_max = sysconf(_SC_ARG_MAX);
/*
* (argc) and (argv) are still offset by one to make it simpler to
* expand %digit references. At the end of the loop check for (argc)
* equals 1 means that all the (argv) has been consumed.
*/
for (rval = 0; argc > nargs; argc -= nargs, argv += nargs) {
sbuf_clear(cmdbuf);
sbuf_cat(cmdbuf, "exec ");
/* Expand command argv references. */
for (p = cmd; *p != '\0'; ++p) {
if (ISMAGICNO(p)) {
if (sbuf_cat(cmdbuf, argv[(++p)[0] - '0'])
== -1)
errc(1, ENOMEM, "sbuf");
} else {
if (sbuf_putc(cmdbuf, *p) == -1)
errc(1, ENOMEM, "sbuf");
}
if (sbuf_len(cmdbuf) > arg_max)
errc(1, E2BIG, NULL);
}
/* Terminate the command string. */
sbuf_finish(cmdbuf);
/* Run the command. */
if (debug)
(void)printf("%s\n", sbuf_data(cmdbuf));
else
if (exec_shell(sbuf_data(cmdbuf), shell, name))
rval = 1;
}
if (argc != 1)
errx(1, "expecting additional argument%s after \"%s\"",
(nargs - argc) ? "s" : "", argv[argc - 1]);
free(cmd);
sbuf_delete(cmdbuf);
free(shell);
exit(rval);
}
/*
* exec_shell --
* Execute a shell command using passed use_shell and use_name
* arguments.
*/
static int
exec_shell(const char *command, const char *use_shell, const char *use_name)
{
pid_t pid;
int omask, pstat;
sig_t intsave, quitsave;
if (!command) /* just checking... */
return(1);
omask = sigblock(sigmask(SIGCHLD));
switch(pid = vfork()) {
case -1: /* error */
err(1, "vfork");
case 0: /* child */
(void)sigsetmask(omask);
execl(use_shell, use_name, "-c", command, (char *)NULL);
warn("%s", use_shell);
_exit(1);
}
intsave = signal(SIGINT, SIG_IGN);
quitsave = signal(SIGQUIT, SIG_IGN);
pid = waitpid(pid, &pstat, 0);
(void)sigsetmask(omask);
(void)signal(SIGINT, intsave);
(void)signal(SIGQUIT, quitsave);
return(pid == -1 ? -1 : pstat);
}
static void
usage(void)
{
(void)fprintf(stderr,
"usage: apply [-a magic] [-d] [-0123456789] command arguments ...\n");
exit(1);
}
