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/*
* SPDX-License-Identifier: ISC
*
* Copyright (c) 2021 Todd C. Miller <Todd.Miller@sudo.ws>
*
* Permission to use, copy, modify, and 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.
*/
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifdef HAVE_STDBOOL_H
# include <stdbool.h>
#else
# include "compat/stdbool.h"
#endif
#include <unistd.h>
#include <pwd.h>
#include <grp.h>
#define SUDO_ERROR_WRAP 0
#include "sudo_compat.h"
#include "sudo_fatal.h"
#include "sudo_util.h"
sudo_dso_public int main(int argc, char *argv[]);
/*
* Implement "id -G" using sudo_getgrouplist2().
*/
int
main(int argc, char *argv[])
{
char *username = NULL;
GETGROUPS_T *groups = NULL;
struct passwd *pw;
int ch, i, ngroups;
gid_t basegid;
initprogname(argc > 0 ? argv[0] : "getgids");
while ((ch = getopt(argc, argv, "v")) != -1) {
switch (ch) {
case 'v':
/* ignore */
break;
default:
fprintf(stderr, "usage: %s [-v] [user]\n", getprogname());
return EXIT_FAILURE;
}
}
argc -= optind;
argv += optind;
if (argc > 0)
username = argv[0];
if (username != NULL) {
if ((pw = getpwnam(username)) == NULL)
sudo_fatalx("unknown user name %s", username);
} else {
if ((pw = getpwuid(getuid())) == NULL)
sudo_fatalx("unknown user ID %u", (unsigned int)getuid());
}
basegid = pw->pw_gid;
if ((username = strdup(pw->pw_name)) == NULL)
sudo_fatal(NULL);
if (sudo_getgrouplist2(username, basegid, &groups, &ngroups) == -1)
sudo_fatal("sudo_getgroulist2");
for (i = 0; i < ngroups; i++) {
printf("%s%u", i ? " " : "", (unsigned int)groups[i]);
}
putchar('\n');
return EXIT_SUCCESS;
}
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