[apple/shell_cmds.git] / apply / apply.c

/*	$NetBSD: apply.c,v 1.6 1997/12/31 05:53:45 thorpej Exp $	*/

/*-
 * 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.
 */

#include <sys/cdefs.h>
#ifndef lint
#if 0
static char sccsid[] = "@(#)apply.c	8.4 (Berkeley) 4/4/94";
#else
__RCSID("$NetBSD: apply.c,v 1.6 1997/12/31 05:53:45 thorpej Exp $");
#endif
#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>

int	main __P((int, char **));
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, "malloc");
		
	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, "malloc");

	/*
	 * (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, "malloc");

		/* 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;
	union wait pstat;
	pid_t pid;
	int omask;
	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 = vfork()) {
	case -1:			/* error */
		err(1, "vfork");
	case 0:				/* child */
		(void)sigsetmask(omask);
		execl(shell, name, "-c", command, NULL);
		warn("%s", shell);
		_exit(1);
	}
	intsave = signal(SIGINT, SIG_IGN);
	quitsave = signal(SIGQUIT, SIG_IGN);
	pid = waitpid(pid, (int *)&pstat, 0);
	(void)sigsetmask(omask);
	(void)signal(SIGINT, intsave);
	(void)signal(SIGQUIT, quitsave);
	return(pid == -1 ? -1 : pstat.w_status);
}

void
usage()
{

	(void)fprintf(stderr,
	    "usage: apply [-a magic] [-0123456789] command arguments ...\n");
	exit(1);
}
Commit	Line	Data
44bd5ea7 A	1	/* $NetBSD: apply.c,v 1.6 1997/12/31 05:53:45 thorpej Exp $ */
	2
	3	/*-
	4	* Copyright (c) 1994
	5	* The Regents of the University of California. All rights reserved.
	6	*
	7	* This code is derived from software contributed to Berkeley by
	8	* Jan-Simon Pendry.
	9	*
	10	* Redistribution and use in source and binary forms, with or without
	11	* modification, are permitted provided that the following conditions
	12	* are met:
	13	* 1. Redistributions of source code must retain the above copyright
	14	* notice, this list of conditions and the following disclaimer.
	15	* 2. Redistributions in binary form must reproduce the above copyright
	16	* notice, this list of conditions and the following disclaimer in the
	17	* documentation and/or other materials provided with the distribution.
	18	* 3. All advertising materials mentioning features or use of this software
	19	* must display the following acknowledgement:
	20	* This product includes software developed by the University of
	21	* California, Berkeley and its contributors.
	22	* 4. Neither the name of the University nor the names of its contributors
	23	* may be used to endorse or promote products derived from this software
	24	* without specific prior written permission.
	25	*
	26	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	27	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	28	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	29	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	30	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	31	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	32	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	33	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	34	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	35	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	36	* SUCH DAMAGE.
	37	*/
	38
	39	#include <sys/cdefs.h>
	40	#ifndef lint
	41	#if 0
	42	static char sccsid[] = "@(#)apply.c 8.4 (Berkeley) 4/4/94";
	43	#else
	44	__RCSID("$NetBSD: apply.c,v 1.6 1997/12/31 05:53:45 thorpej Exp $");
	45	#endif
	46	#endif /* not lint */
	47
	48	#include <sys/wait.h>
	49
	50	#include <ctype.h>
	51	#include <err.h>
	52	#include <paths.h>
	53	#include <signal.h>
	54	#include <stdio.h>
	55	#include <stdlib.h>
	56	#include <string.h>
	57	#include <unistd.h>
	58
	59	int main __P((int, char **));
	60	void usage __P((void));
	61	int system __P((const char *));
	62
	63	int
	64	main(argc, argv)
65	int argc;
66	char *argv[];
67	{
68	int ch, clen, debug, i, l, magic, n, nargs, rval;
69	char c, cmd, p, q;
70
71	debug = 0;
72	magic = '%'; /* Default magic char is `%'. */
73	nargs = -1;
74	while ((ch = getopt(argc, argv, "a:d0123456789")) != -1)
75	switch (ch) {
76	case 'a':
77	if (optarg[1] != '\0')
78	errx(1,
79	"illegal magic character specification.");
80	magic = optarg[0];
81	break;
82	case 'd':
83	debug = 1;
84	break;
85	case '0': case '1': case '2': case '3': case '4':
86	case '5': case '6': case '7': case '8': case '9':
87	if (nargs != -1)
88	errx(1,
89	"only one -# argument may be specified.");
90	nargs = optopt - '0';
91	break;
92	default:
93	usage();
94	}
95	argc -= optind;
96	argv += optind;
97
98	if (argc < 2)
99	usage();
100
101	/*
102	* The command to run is argv[0], and the args are argv[1..].
103	* Look for %digit references in the command, remembering the
104	* largest one.
105	*/
106	for (n = 0, p = argv[0]; *p != '\0'; ++p)
107	if (p[0] == magic && isdigit(p[1]) && p[1] != '0') {
108	++p;
109	if (p[0] - '0' > n)
110	n = p[0] - '0';
111	}
112
113	/*
114	* If there were any %digit references, then use those, otherwise
115	* build a new command string with sufficient %digit references at
116	* the end to consume (nargs) arguments each time round the loop.
117	* Allocate enough space to hold the maximum command.
118	*/
119	if ((cmd = malloc(sizeof("exec ") - 1 +
120	strlen(argv[0]) + 9 * (sizeof(" %1") - 1) + 1)) == NULL)
121	err(1, "malloc");
122
123	if (n == 0) {
124	/* If nargs not set, default to a single argument. */
125	if (nargs == -1)
126	nargs = 1;
127
128	p = cmd;
129	p += sprintf(cmd, "exec %s", argv[0]);
130	for (i = 1; i <= nargs; i++)
131	p += sprintf(p, " %c%d", magic, i);
132
133	/*
134	* If nargs set to the special value 0, eat a single
135	* argument for each command execution.
136	*/
137	if (nargs == 0)
138	nargs = 1;
139	} else {
140	(void)sprintf(cmd, "exec %s", argv[0]);
141	nargs = n;
142	}
143
144	/*
145	* Grab some space in which to build the command. Allocate
146	* as necessary later, but no reason to build it up slowly
147	* for the normal case.
148	*/
149	if ((c = malloc(clen = 1024)) == NULL)
150	err(1, "malloc");
151
152	/*
153	* (argc) and (argv) are still offset by one to make it simpler to
154	* expand %digit references. At the end of the loop check for (argc)
155	* equals 1 means that all the (argv) has been consumed.
156	*/
157	for (rval = 0; argc > nargs; argc -= nargs, argv += nargs) {
158	/*
159	* Find a max value for the command length, and ensure
160	* there's enough space to build it.
161	*/
162	for (l = strlen(cmd), i = 0; i < nargs; i++)
163	l += strlen(argv[i]);
164	if (l > clen && (c = realloc(c, clen = l)) == NULL)
165	err(1, "malloc");
166
167	/* Expand command argv references. */
168	for (p = cmd, q = c; *p != '\0'; ++p)
169	if (p[0] == magic && isdigit(p[1]) && p[1] != '0')
170	q += sprintf(q, "%s", argv[(++p)[0] - '0']);
171	else
172	q++ = p;
173
174	/* Terminate the command string. */
175	*q = '\0';
176
177	/* Run the command. */
178	if (debug)
179	(void)printf("%s\n", c);
180	else
181	if (system(c))
182	rval = 1;
183	}
184
185	if (argc != 1)
186	errx(1, "expecting additional argument%s after \"%s\"",
187	(nargs - argc) ? "s" : "", argv[argc - 1]);
188	exit(rval);
189	}
190
191	/*
192	* system --
193	* Private version of system(3). Use the user's SHELL environment
194	* variable as the shell to execute.
195	*/
196	int
197	system(command)
198	const char *command;
199	{
200	static char name, shell;
201	union wait pstat;
202	pid_t pid;
203	int omask;
204	sig_t intsave, quitsave;
205
206	if (shell == NULL) {
207	if ((shell = getenv("SHELL")) == NULL)
208	shell = _PATH_BSHELL;
209	if ((name = strrchr(shell, '/')) == NULL)
210	name = shell;
211	else
212	++name;
213	}
214	if (!command) /* just checking... */
215	return(1);
216
217	omask = sigblock(sigmask(SIGCHLD));
218	switch(pid = vfork()) {
219	case -1: /* error */
220	err(1, "vfork");
221	case 0: /* child */
222	(void)sigsetmask(omask);
223	execl(shell, name, "-c", command, NULL);
224	warn("%s", shell);
225	_exit(1);
226	}
227	intsave = signal(SIGINT, SIG_IGN);
228	quitsave = signal(SIGQUIT, SIG_IGN);
229	pid = waitpid(pid, (int *)&pstat, 0);
230	(void)sigsetmask(omask);
231	(void)signal(SIGINT, intsave);
232	(void)signal(SIGQUIT, quitsave);
233	return(pid == -1 ? -1 : pstat.w_status);
234	}
235
236	void
237	usage()
238	{
239
240	(void)fprintf(stderr,
241	"usage: apply [-a magic] [-0123456789] command arguments ...\n");
242	exit(1);
243	}