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/* $OpenBSD: env.c,v 1.15 2014/03/08 00:09:20 schwarze Exp $ */
/*
* Copyright (c) 1988, 1993, 1994
* 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. 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 <err.h>
#include <errno.h>
#include <locale.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
__dead void usage(void);
int
main(int argc, char *argv[])
{
extern char **environ;
extern int optind;
char **ep, *p;
int ch;
setlocale(LC_ALL, "");
while ((ch = getopt(argc, argv, "i-")) != -1)
switch(ch) {
case '-': /* obsolete */
case 'i':
if ((environ = calloc(1, sizeof(char *))) == NULL)
err(126, "calloc");
break;
default:
usage();
}
argc -= optind;
argv += optind;
for (; *argv && (p = strchr(*argv, '=')); ++argv) {
*p++ = '\0';
if (setenv(*argv, p, 1) == -1) {
/* reuse 126, it matches the problem most */
err(126, "setenv");
}
}
if (*argv) {
/*
* return 127 if the command to be run could not be
* found; 126 if the command was found but could
* not be invoked
*/
execvp(*argv, argv);
err((errno == ENOENT) ? 127 : 126, "%s", *argv);
}
for (ep = environ; *ep; ep++)
(void)printf("%s\n", *ep);
exit(0);
}
void
usage(void)
{
extern char *__progname;
(void)fprintf(stderr, "usage: %s [-i] [name=value ...] "
"[utility [argument ...]]\n", __progname);
exit(1);
}
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