101 lines
2.9 KiB
C
101 lines
2.9 KiB
C
/* $OpenBSD: env.c,v 1.19 2024/07/28 21:44:42 kn 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 <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
|
|
static void __dead usage(void);
|
|
|
|
int
|
|
main(int argc, char *argv[])
|
|
{
|
|
extern char **environ;
|
|
extern int optind;
|
|
char **ep, *p;
|
|
int ch;
|
|
|
|
if (pledge("stdio exec", NULL) == -1)
|
|
err(1, "pledge");
|
|
|
|
while ((ch = getopt(argc, argv, "iu:-")) != -1)
|
|
switch(ch) {
|
|
case '-': /* obsolete */
|
|
case 'i':
|
|
if ((environ = calloc(1, sizeof(char *))) == NULL)
|
|
err(126, "calloc");
|
|
break;
|
|
case 'u':
|
|
if (unsetenv(optarg) == -1)
|
|
err(126, "unsetenv");
|
|
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);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void __dead
|
|
usage(void)
|
|
{
|
|
extern char *__progname;
|
|
|
|
(void)fprintf(stderr, "usage: %s [-i] [-u name] [name=value ...] "
|
|
"[utility [argument ...]]\n", __progname);
|
|
exit(1);
|
|
}
|