NetBSD/usr.bin/env/env.c

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/*
* Copyright (c) 1988 The Regents of the University of California.
* All rights reserved.
*
* 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
char copyright[] =
"@(#) Copyright (c) 1988 The Regents of the University of California.\n\
All rights reserved.\n";
#endif /* not lint */
#ifndef lint
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/*static char sccsid[] = "from: @(#)env.c 5.3 (Berkeley) 6/1/90";*/
static char rcsid[] = "$Id: env.c,v 1.7 1993/12/31 19:26:21 jtc Exp $";
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#endif /* not lint */
#include <stdio.h>
#include <stdlib.h>
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#include <string.h>
#include <locale.h>
#include <errno.h>
#include <unistd.h>
#include <err.h>
static void usage __P((void));
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int
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main(argc, argv)
int argc;
char **argv;
{
extern char **environ;
extern int errno, optind;
register char **ep, *p;
char *cleanenv[1];
int ch;
setlocale(LC_ALL, "");
while ((ch = getopt(argc, argv, "-i")) != -1)
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switch((char)ch) {
case '-': /* obsolete */
case 'i':
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environ = cleanenv;
cleanenv[0] = NULL;
break;
case '?':
default:
usage();
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}
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for (argv += optind; *argv && (p = index(*argv, '=')); ++argv)
(void)setenv(*argv, ++p, 1);
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if (*argv) {
/* return 127 if the command to be run could not be found; 126
if the command was was found but could not be invoked */
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execvp(*argv, argv);
err((errno == ENOENT) ? 127 : 126, "%s", *argv);
/* NOTREACHED */
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}
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for (ep = environ; *ep; ep++)
(void)printf("%s\n", *ep);
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exit(0);
}
static void
usage ()
{
(void) fprintf(stderr, "usage: env [-i] [name=value ...] [command]\n");
exit (1);
}