X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;ds=sidebyside;f=coreutils%2Fid.c;h=66874a71e68b3fe243316411492c9cd37b44a20a;hb=d686a045c8134d3a42fa5cc6b2e09118e08d603f;hp=542f86566fc3247ac7f9ad1da427decff2b624f4;hpb=7ab9c7ee52db8759d457819f5480378fa3aa97cc;p=oweals%2Fbusybox.git

diff --git a/coreutils/id.c b/coreutils/id.c
index 542f86566..66874a71e 100644
--- a/coreutils/id.c
+++ b/coreutils/id.c
@@ -2,94 +2,110 @@
 /*
  * Mini id implementation for busybox
  *
- *
  * 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 "internal.h"
+#include "busybox.h"
 #include <stdio.h>
 #include <unistd.h>
-#include <pwd.h>
-#include <grp.h>
 #include <sys/types.h>
 
-static const char id_usage[] =
-	"id [OPTIONS]... [USERNAME]\n"
-#ifndef BB_FEATURE_TRIVIAL_HELP
-	"\nPrint information for USERNAME or the current user\n\n"
-	"\t-g\tprints only the group ID\n"
-	"\t-u\tprints only the user ID\n"
-	"\t-r\tprints the real user ID instead of the effective ID (with -ug)\n\n"
+#ifdef CONFIG_SELINUX
+#include <selinux/selinux.h>          /* for is_selinux_enabled() */
 #endif
-	;
 
-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
+
+static short printf_full(unsigned int id, const char *arg, const char prefix)
 {
-	int no_user = 0, no_group = 0, print_real = 0;
-	char *cp, *user, *group;
+	const char *fmt = "%cid=%u";
+	short status = EXIT_FAILURE;
+
+	if (arg) {
+		fmt = "%cid=%u(%s)";
+		status = EXIT_SUCCESS;
+	}
+	printf(fmt, prefix, id, arg);
+	return status;
+}
+
+int id_main(int argc, char **argv)
+{
+	struct passwd *p;
+	uid_t uid;
 	gid_t gid;
-	
-	cp = user = group = NULL;
+	unsigned long flags;
+	short status;
 
-	argc--; argv++;
+	/* 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");
 
-	while (argc > 0) {
-		cp = *argv;
-		if (*cp == '-') {
-			switch (*++cp) {
-			case 'u': no_group = 1; break;
-			case 'g': no_user = 1; break;
-			case 'r': print_real = 1; break;
-			default: usage(id_usage);
-			}
-		} else {
-			user = cp;			
-		}
-		argc--; argv++;
+	/* This values could be overwritten later */
+	uid = geteuid();
+	gid = getegid();
+	if (flags & PRINT_REAL) {
+		uid = getuid();
+		gid = getgid();
 	}
 
-	if (no_user && no_group) usage(id_usage);
+	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 (user == NULL) {
-		user = xmalloc(9);
-		group = xmalloc(9);
-		if (print_real) {
-			my_getpwuid(user, getuid());
-			my_getgrgid(group, getgid());
+	if (flags & (JUST_GROUP | JUST_USER)) {
+		/* 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 {
-			my_getpwuid(user, geteuid());
-			my_getgrgid(group, getegid());
+			printf("%u\n", (flags & JUST_USER) ? uid : gid);
 		}
-	} else {
-		group = xmalloc(9);
-	    gid = my_getpwnamegid(user);
-		my_getgrgid(group, gid);
+		/* exit */
+		fflush_stdout_and_exit(EXIT_SUCCESS);
 	}
 
-	if (no_group) printf("%u\n", my_getpwnam(user));
-	else if (no_user) printf("%u\n", my_getgrnam(group));
-	else
-		printf("uid=%u(%s) gid=%u(%s)\n",
-			   my_getpwnam(user), user, my_getgrnam(group), group);
-	
+	/* 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');
 
-	exit(0);
-}
+#ifdef CONFIG_SELINUX
+	if (is_selinux_enabled()) {
+			security_context_t mysid;
+			char context[80];
+			int len = sizeof(context);
 
+			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
 
-/* END CODE */
+	putchar('\n');
+	fflush_stdout_and_exit(status);
+}