234 lines
6.3 KiB
C
234 lines
6.3 KiB
C
/*-
|
|
* 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. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. 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.
|
|
*/
|
|
|
|
#ifndef lint
|
|
static const char sccsid[] = "@(#)apply.c 8.4 (Berkeley) 4/4/94";
|
|
#endif /* not lint */
|
|
|
|
#include <sys/wait.h>
|
|
|
|
#include <ctype.h>
|
|
#include <err.h>
|
|
#include <paths.h>
|
|
#include <signal.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
|
|
void usage __P((void));
|
|
int system __P((const char *));
|
|
|
|
int
|
|
main(argc, argv)
|
|
int argc;
|
|
char *argv[];
|
|
{
|
|
int ch, clen, debug, i, l, magic, n, nargs, rval;
|
|
char *c, *cmd, *p, *q;
|
|
|
|
debug = 0;
|
|
magic = '%'; /* Default magic char is `%'. */
|
|
nargs = -1;
|
|
while ((ch = getopt(argc, argv, "a:d0123456789")) != -1)
|
|
switch (ch) {
|
|
case 'a':
|
|
if (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 (p[0] == magic && isdigit(p[1]) && p[1] != '0') {
|
|
++p;
|
|
if (p[0] - '0' > n)
|
|
n = p[0] - '0';
|
|
}
|
|
|
|
/*
|
|
* 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.
|
|
*/
|
|
if ((cmd = malloc(sizeof("exec ") - 1 +
|
|
strlen(argv[0]) + 9 * (sizeof(" %1") - 1) + 1)) == NULL)
|
|
err(1, NULL);
|
|
|
|
if (n == 0) {
|
|
/* If nargs not set, default to a single argument. */
|
|
if (nargs == -1)
|
|
nargs = 1;
|
|
|
|
p = cmd;
|
|
p += sprintf(cmd, "exec %s", argv[0]);
|
|
for (i = 1; i <= nargs; i++)
|
|
p += sprintf(p, " %c%d", magic, i);
|
|
|
|
/*
|
|
* If nargs set to the special value 0, eat a single
|
|
* argument for each command execution.
|
|
*/
|
|
if (nargs == 0)
|
|
nargs = 1;
|
|
} else {
|
|
(void)sprintf(cmd, "exec %s", argv[0]);
|
|
nargs = n;
|
|
}
|
|
|
|
/*
|
|
* Grab some space in which to build the command. Allocate
|
|
* as necessary later, but no reason to build it up slowly
|
|
* for the normal case.
|
|
*/
|
|
if ((c = malloc(clen = 1024)) == NULL)
|
|
err(1, NULL);
|
|
|
|
/*
|
|
* (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) {
|
|
/*
|
|
* Find a max value for the command length, and ensure
|
|
* there's enough space to build it.
|
|
*/
|
|
for (l = strlen(cmd), i = 0; i < nargs; i++)
|
|
l += strlen(argv[i]);
|
|
if (l > clen && (c = realloc(c, clen = l)) == NULL)
|
|
err(1, NULL);
|
|
|
|
/* Expand command argv references. */
|
|
for (p = cmd, q = c; *p != '\0'; ++p)
|
|
if (p[0] == magic && isdigit(p[1]) && p[1] != '0')
|
|
q += sprintf(q, "%s", argv[(++p)[0] - '0']);
|
|
else
|
|
*q++ = *p;
|
|
|
|
/* Terminate the command string. */
|
|
*q = '\0';
|
|
|
|
/* Run the command. */
|
|
if (debug)
|
|
(void)printf("%s\n", c);
|
|
else
|
|
if (system(c))
|
|
rval = 1;
|
|
}
|
|
|
|
if (argc != 1)
|
|
errx(1, "expecting additional argument%s after \"%s\"",
|
|
(nargs - argc) ? "s" : "", argv[argc - 1]);
|
|
exit(rval);
|
|
}
|
|
|
|
/*
|
|
* system --
|
|
* Private version of system(3). Use the user's SHELL environment
|
|
* variable as the shell to execute.
|
|
*/
|
|
int
|
|
system(command)
|
|
const char *command;
|
|
{
|
|
static char *name, *shell;
|
|
pid_t pid;
|
|
int omask, pstat;
|
|
sig_t intsave, quitsave;
|
|
|
|
if (shell == NULL) {
|
|
if ((shell = getenv("SHELL")) == NULL)
|
|
shell = _PATH_BSHELL;
|
|
if ((name = strrchr(shell, '/')) == NULL)
|
|
name = shell;
|
|
else
|
|
++name;
|
|
}
|
|
if (!command) /* just checking... */
|
|
return(1);
|
|
|
|
omask = sigblock(sigmask(SIGCHLD));
|
|
switch(pid = fork()) {
|
|
case -1: /* error */
|
|
err(1, "fork");
|
|
case 0: /* child */
|
|
(void)sigsetmask(omask);
|
|
execl(shell, name, "-c", command, NULL);
|
|
err(1, "%s", shell);
|
|
}
|
|
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);
|
|
}
|
|
|
|
void
|
|
usage()
|
|
{
|
|
|
|
(void)fprintf(stderr,
|
|
"usage: apply [-a magic] [-0123456789] command arguments ...\n");
|
|
exit(1);
|
|
}
|