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/*
* UNG's Not GNU
*
* Copyright (c) 2011-2017, Jakob Kaivo <jkk@ung.org>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
*/
#define _XOPEN_SOURCE 700
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#define UTILITY_NOT_INVOKED (126)
#define UTILITY_NOT_FOUND (127)
extern char **environ;
int main(int argc, char *argv[])
{
int c;
while ((c = getopt(argc, argv, "i")) != -1) {
switch (c) {
case 'i': /** ignore inherited environment **/
environ = NULL;
break;
default:
return 1;
}
}
while (argv[optind] && strchr(argv[optind], '=')) {
putenv(argv[optind++]);
}
if (optind >= argc) {
if (environ) {
for (int i = 0; environ[i]; i++) {
puts(environ[i]);
}
}
return 0;
}
execvp(argv[optind], argv + optind);
fprintf(stderr, "env: Couldn't run '%s': %s\n", argv[optind], strerror(errno));
return errno == ENOENT ? UTILITY_NOT_FOUND : UTILITY_NOT_INVOKED;
}
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