mirror of https://github.com/sudo-project/sudo.git
92 lines
2.3 KiB
C
92 lines
2.3 KiB
C
/*
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* SPDX-License-Identifier: ISC
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*
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* Copyright (c) 2021 Todd C. Miller <Todd.Miller@sudo.ws>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <config.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#ifdef HAVE_STDBOOL_H
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# include <stdbool.h>
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#else
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# include <compat/stdbool.h>
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#endif
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#include <unistd.h>
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#include <pwd.h>
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#include <grp.h>
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#define SUDO_ERROR_WRAP 0
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#include <sudo_compat.h>
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#include <sudo_fatal.h>
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#include <sudo_util.h>
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sudo_dso_public int main(int argc, char *argv[]);
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/*
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* Implement "id -G" using sudo_getgrouplist2().
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*/
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int
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main(int argc, char *argv[])
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{
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char *username = NULL;
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GETGROUPS_T *groups = NULL;
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struct passwd *pw;
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int ch, i, ngroups;
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gid_t basegid;
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initprogname(argc > 0 ? argv[0] : "getgids");
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while ((ch = getopt(argc, argv, "v")) != -1) {
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switch (ch) {
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case 'v':
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/* ignore */
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break;
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default:
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fprintf(stderr, "usage: %s [-v] [user]\n", getprogname());
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return EXIT_FAILURE;
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}
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}
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argc -= optind;
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argv += optind;
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if (argc > 0)
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username = argv[0];
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if (username != NULL) {
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if ((pw = getpwnam(username)) == NULL)
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sudo_fatalx("unknown user name %s", username);
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} else {
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if ((pw = getpwuid(getuid())) == NULL)
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sudo_fatalx("unknown user ID %u", (unsigned int)getuid());
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}
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basegid = pw->pw_gid;
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if ((username = strdup(pw->pw_name)) == NULL)
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sudo_fatal(NULL);
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if (sudo_getgrouplist2(username, basegid, &groups, &ngroups) == -1)
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sudo_fatal("sudo_getgroulist2");
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for (i = 0; i < ngroups; i++) {
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printf("%s%u", i ? " " : "", (unsigned int)groups[i]);
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}
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putchar('\n');
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return EXIT_SUCCESS;
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}
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