*
* Copyright (C) 2000 by Randolph Chung <tausq@debian.org>
*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
+ * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
+ */
+
+/* BB_AUDIT SUSv3 _NOT_ compliant -- option -G is not currently supported. */
+/* Hacked by Tito Ragusa (C) 2004 to handle usernames of whatever length and to
+ * be more similar to GNU id.
+ * -Z option support: by Yuichi Nakamura <ynakam@hitachisoft.jp>
*/
#include "busybox.h"
#include <stdio.h>
#include <unistd.h>
-#include <getopt.h>
-#include <string.h>
#include <sys/types.h>
-extern int id_main(int argc, char **argv)
+#define PRINT_REAL 1
+#define NAME_NOT_NUMBER 2
+#define JUST_USER 4
+#define JUST_GROUP 8
+#if ENABLE_SELINUX
+#define JUST_CONTEXT 16
+#endif
+
+static short printf_full(unsigned int id, const char *arg, const char prefix)
{
- int no_user = 0, no_group = 0, print_real = 0;
- int name_not_number = 0;
- char user[9], group[9];
- long gid;
- long pwnam, grnam;
- int opt;
-
- gid = 0;
+ const char *fmt = "%cid=%u";
+ short status = EXIT_FAILURE;
- while ((opt = getopt(argc, argv, "ugrn")) > 0) {
- switch (opt) {
- case 'u':
- no_group++;
- break;
- case 'g':
- no_user++;
- break;
- case 'r':
- print_real++;
- break;
- case 'n':
- name_not_number++;
- break;
- default:
- show_usage();
- }
+ if (arg) {
+ fmt = "%cid=%u(%s)";
+ status = EXIT_SUCCESS;
}
+ printf(fmt, prefix, id, arg);
+ return status;
+}
- if (no_user && no_group) show_usage();
+int id_main(int argc, char **argv);
+int id_main(int argc, char **argv)
+{
+ struct passwd *p;
+ uid_t uid;
+ gid_t gid;
+ unsigned long flags;
+ short status;
+#if ENABLE_SELINUX
+ security_context_t scontext;
+#endif
+ /* Don't allow -n -r -nr -ug -rug -nug -rnug */
+ /* Don't allow more than one username */
+ opt_complementary = "?1:?:u--g:g--u:r?ug:n?ug" USE_SELINUX(":u--Z:Z--u:g--Z:Z--g");
+ flags = getopt32(argc, argv, "rnug" USE_SELINUX("Z"));
- if (argv[optind] == NULL) {
- if (print_real) {
- my_getpwuid(user, getuid());
- my_getgrgid(group, getgid());
- } else {
- my_getpwuid(user, geteuid());
- my_getgrgid(group, getegid());
- }
- } else {
- strncpy(user, argv[optind], 8);
- user[8] = '\0';
- gid = my_getpwnamegid(user);
- my_getgrgid(group, gid);
+ /* This values could be overwritten later */
+ uid = geteuid();
+ gid = getegid();
+ if (flags & PRINT_REAL) {
+ uid = getuid();
+ gid = getgid();
}
- pwnam=my_getpwnam(user);
- grnam=my_getgrnam(group);
+ if (argv[optind]) {
+ p = getpwnam(argv[optind]);
+ /* xuname2uid is needed because it exits on failure */
+ uid = xuname2uid(argv[optind]);
+ gid = p->pw_gid;
+ /* in this case PRINT_REAL is the same */
+ }
- if (no_group) {
- if(name_not_number && user)
- puts(user);
- else
- printf("%ld\n", pwnam);
- } else if (no_user) {
- if(name_not_number && group)
- puts(group);
- else
- printf("%ld\n", grnam);
- } else {
- printf("uid=%ld(%s) gid=%ld(%s)\n", pwnam, user, grnam, group);
+ if (flags & (JUST_GROUP | JUST_USER USE_SELINUX(| JUST_CONTEXT))) {
+ /* JUST_GROUP and JUST_USER are mutually exclusive */
+ if (flags & NAME_NOT_NUMBER) {
+ /* bb_getpwuid and bb_getgrgid exit on failure so puts cannot segfault */
+ puts((flags & JUST_USER) ? bb_getpwuid(NULL, uid, -1 ) : bb_getgrgid(NULL, gid, -1 ));
+ } else {
+ if (flags & JUST_USER) {
+ printf("%u\n", uid);
+ }
+ if (flags & JUST_GROUP) {
+ printf("%u\n", gid);
+ }
+ }
+
+#if ENABLE_SELINUX
+ if (flags & JUST_CONTEXT) {
+ selinux_or_die();
+ if (argc - optind == 1) {
+ bb_error_msg_and_die("can't print security context when user specified");
+ }
+
+ if (getcon(&scontext)) {
+ bb_error_msg_and_die("can't get process context");
+ }
+ printf("%s\n", scontext);
+ }
+#endif
+ /* exit */
+ fflush_stdout_and_exit(EXIT_SUCCESS);
}
- return(0);
-}
+ /* Print full info like GNU id */
+ /* bb_getpwuid doesn't exit on failure here */
+ status = printf_full(uid, bb_getpwuid(NULL, uid, 0), 'u');
+ putchar(' ');
+ /* bb_getgrgid doesn't exit on failure here */
+ status |= printf_full(gid, bb_getgrgid(NULL, gid, 0), 'g');
+
+#if ENABLE_SELINUX
+ if (is_selinux_enabled()) {
+ security_context_t mysid;
+ const char *context;
-/* END CODE */
+ context = "unknown";
+ getcon(&mysid);
+ if (mysid) {
+ context = alloca(strlen(mysid) + 1);
+ strcpy((char*)context, mysid);
+ freecon(mysid);
+ }
+ printf(" context=%s", context);
+ }
+#endif
+
+ putchar('\n');
+ fflush_stdout_and_exit(status);
+}
projects / oweals / busybox.git / blobdiff