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/*
* UNG's Not GNU
*
* Copyright (c) 2022, Jakob Kaivo <jkk@ung.org>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
/* TODO: track down XPG/3 or 4 for more details on requirements */
#define _XOPEN_SOURCE 400
#define _XOPEN_SOURCE_EXTENDED 1
#include <errno.h>
#include <fcntl.h>
#include <locale.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#define UTILITY_NOT_INVOKED (126)
#define UTILITY_NOT_FOUND (127)
int main(int argc, char *argv[])
{
setlocale(LC_ALL, "");
while (getopt(argc, argv, "") != -1) {
return 1;
}
if (optind >= argc - 1) {
fprintf(stderr, "chroot: missing operand\n");
return UTILITY_NOT_INVOKED;
}
if (chroot(argv[optind++]) != 0) {
perror("chroot");
return UTILITY_NOT_INVOKED;
}
execvp(argv[optind], argv + optind);
fprintf(stderr, "chroot: %s: %s\n", argv[optind], strerror(errno));
return errno == ENOENT ? UTILITY_NOT_FOUND : UTILITY_NOT_INVOKED;
}
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