*
* 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.
+ */
#include "busybox.h"
#include <stdio.h>
#include <unistd.h>
-#include <getopt.h>
-#include <string.h>
#include <sys/types.h>
+
#ifdef CONFIG_SELINUX
-#include <proc_secure.h>
-#include <flask_util.h>
+#include <selinux/selinux.h> /* for is_selinux_enabled() */
#endif
-#define JUST_USER 1
-#define JUST_GROUP 2
-#define PRINT_REAL 4
-#define NAME_NOT_NUMBER 8
+#define PRINT_REAL 1
+#define NAME_NOT_NUMBER 2
+#define JUST_USER 4
+#define JUST_GROUP 8
-extern int id_main(int argc, char **argv)
+static short printf_full(unsigned int id, const char *arg, const char prefix)
{
- char user[32], group[32];
- long pwnam, grnam;
- int uid, gid;
- int flags;
-#ifdef CONFIG_SELINUX
- int is_flask_enabled_flag = is_flask_enabled();
-#endif
-
- flags = bb_getopt_ulflags(argc, argv, "ugrn");
+ const char *fmt = "%cid=%u";
+ short status = EXIT_FAILURE;
- if (((flags & (JUST_USER | JUST_GROUP)) == (JUST_USER | JUST_GROUP))
- || (argc > optind + 1)
- ) {
- bb_show_usage();
+ if (arg) {
+ fmt = "%cid=%u(%s)";
+ status = EXIT_SUCCESS;
}
+ printf(fmt, prefix, id, arg);
+ return status;
+}
- if (argv[optind] == NULL) {
- if (flags & PRINT_REAL) {
- uid = getuid();
- gid = getgid();
- } else {
- uid = geteuid();
- gid = getegid();
- }
- my_getpwuid(user, uid, sizeof(user));
- } else {
- safe_strncpy(user, argv[optind], sizeof(user));
- gid = my_getpwnamegid(user);
+int id_main(int argc, char **argv)
+{
+ struct passwd *p;
+ uid_t uid;
+ gid_t gid;
+ unsigned long flags;
+ short status;
+
+ /* 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";
+ flags = getopt32(argc, argv, "rnug");
+
+ /* This values could be overwritten later */
+ uid = geteuid();
+ gid = getegid();
+ if (flags & PRINT_REAL) {
+ uid = getuid();
+ gid = getgid();
}
- my_getgrgid(group, gid, sizeof(group));
- pwnam=my_getpwnam(user);
- grnam=my_getgrnam(group);
+ if (argv[optind]) {
+ p = getpwnam(argv[optind]);
+ /* bb_xgetpwnam is needed because it exits on failure */
+ uid = bb_xgetpwnam(argv[optind]);
+ gid = p->pw_gid;
+ /* in this case PRINT_REAL is the same */
+ }
if (flags & (JUST_GROUP | JUST_USER)) {
- char *s = group;
- if (flags & JUST_USER) {
- s = user;
- grnam = pwnam;
- }
+ /* JUST_GROUP and JUST_USER are mutually exclusive */
if (flags & NAME_NOT_NUMBER) {
- puts(s);
+ /* 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 {
- printf("%ld\n", grnam);
+ printf("%u\n", (flags & JUST_USER) ? uid : gid);
}
- } else {
+ /* exit */
+ fflush_stdout_and_exit(EXIT_SUCCESS);
+ }
+
+ /* 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');
+
#ifdef CONFIG_SELINUX
- printf("uid=%ld(%s) gid=%ld(%s)", pwnam, user, grnam, group);
- if(is_flask_enabled_flag)
- {
- security_id_t mysid = getsecsid();
+ if (is_selinux_enabled()) {
+ security_context_t mysid;
char context[80];
int len = sizeof(context);
- context[0] = '\0';
- if(security_sid_to_context(mysid, context, &len))
- strcpy(context, "unknown");
- printf(" context=%s\n", context);
- }
- else
- printf("\n");
-#else
- printf("uid=%ld(%s) gid=%ld(%s)\n", pwnam, user, grnam, group);
-#endif
+ getcon(&mysid);
+ context[0] = '\0';
+ if (mysid) {
+ len = strlen(mysid)+1;
+ safe_strncpy(context, mysid, len);
+ freecon(mysid);
+ } else {
+ safe_strncpy(context, "unknown", 8);
+ }
+ printf(" context=%s", context);
}
+#endif
- bb_fflush_stdout_and_exit(0);
+ putchar('\n');
+ fflush_stdout_and_exit(status);
}
projects / oweals / busybox.git / blobdiff