X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=coreutils%2Fid.c;h=66874a71e68b3fe243316411492c9cd37b44a20a;hb=d686a045c8134d3a42fa5cc6b2e09118e08d603f;hp=db8afc58575a3493e7199786aee7878715627957;hpb=52499cb9ae01a67187c65ea43a48140b147968cf;p=oweals%2Fbusybox.git

diff --git a/coreutils/id.c b/coreutils/id.c
index db8afc585..66874a71e 100644
--- a/coreutils/id.c
+++ b/coreutils/id.c
@@ -4,107 +4,108 @@
  *
  * 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);
 }