--- /dev/null
+Index: coreutils/Config.in
+===================================================================
+RCS file: /var/cvs/busybox/coreutils/Config.in,v
+retrieving revision 1.24
+diff -u -r1.24 Config.in
+--- a/coreutils/Config.in 15 Mar 2004 08:28:19 -0000 1.24
++++ b/coreutils/Config.in 1 May 2004 11:39:04 -0000
+@@ -218,6 +218,14 @@
+ help
+ id displays the current user and group ID names.
+
++config CONFIG_FEATURE_ID_GROUPS_ALIAS
++ bool " Support 'groups' as alias to 'id -Gn'"
++ default y
++ depends on CONFIG_ID
++ help
++ Print the groups a user is in. This is an alias to 'id -Gn' on
++ most systems.
++
+ config CONFIG_INSTALL
+ bool "install"
+ default n
+Index: coreutils/id.c
+===================================================================
+RCS file: /var/cvs/busybox/coreutils/id.c,v
+retrieving revision 1.24
+diff -u -r1.24 id.c
+--- a/coreutils/id.c 15 Mar 2004 08:28:20 -0000 1.24
++++ b/coreutils/id.c 1 May 2004 11:39:05 -0000
+@@ -3,6 +3,8 @@
+ * Mini id implementation for busybox
+ *
+ * Copyright (C) 2000 by Randolph Chung <tausq@debian.org>
++ * Copyright (C) 2004 by Tony J. White <tjw@tjw.org>
++ * Copyright (C) 2004 by Glenn McGrath <bug1@iinet.net.au>
+ *
+ * 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
+@@ -20,7 +22,6 @@
+ *
+ */
+
+-/* BB_AUDIT SUSv3 _NOT_ compliant -- option -G is not currently supported. */
+
+ #include "busybox.h"
+ #include <stdio.h>
+@@ -33,78 +34,153 @@
+ #include <flask_util.h>
+ #endif
+
+-#define JUST_USER 1
+-#define JUST_GROUP 2
+-#define PRINT_REAL 4
+-#define NAME_NOT_NUMBER 8
++#define ID_OPT_JUST_USER 1
++#define ID_OPT_JUST_GROUP 2
++#define ID_OPT_ALL_GROUPS 4
++#define ID_OPT_PRINT_REAL 8
++#define ID_OPT_NAME_NOT_NUMBER 16
++
++static void print_groups(unsigned long flags, const char sep)
++{
++ gid_t gids[64];
++ int gid_count;
++ int i;
++
++ gid_count = getgroups(64, gids);
++
++ for (i = 0; i < gid_count; i++) {
++ struct group *tmp_grp;
++
++ if (i != 0) {
++ putchar(sep);
++ }
++ tmp_grp = getgrgid(gids[i]);
++ if (flags & ID_OPT_NAME_NOT_NUMBER) {
++ if (tmp_grp == NULL) {
++ continue;
++ }
++ printf("%s", tmp_grp->gr_name);
++ } else {
++ printf("%u", gids[i]);
++ if (!(flags & ID_OPT_ALL_GROUPS)) {
++ if (tmp_grp == NULL) {
++ continue;
++ }
++ printf("(%s)", tmp_grp->gr_name);
++ }
++ }
++ }
++}
+
+ extern int id_main(int argc, char **argv)
+ {
+- char user[9], group[9];
+- long pwnam, grnam;
+- int uid, gid;
+- int flags;
++ struct group *grp;
++ struct passwd *usr;
++ unsigned long flags;
++ uid_t uid;
++ uid_t gid;
++ uid_t euid;
++ uid_t egid;
+ #ifdef CONFIG_SELINUX
+ int is_flask_enabled_flag = is_flask_enabled();
+ #endif
+
+- flags = bb_getopt_ulflags(argc, argv, "ugrn");
++ bb_opt_complementaly = "u~gG:g~uG:G~ug:~n";
++ flags = bb_getopt_ulflags(argc, argv, "ugGrn");
+
+- if (((flags & (JUST_USER | JUST_GROUP)) == (JUST_USER | JUST_GROUP))
+- || (argc > optind + 1)
+- ) {
++ /* Check one and only one context option was given */
++ if ((flags & 0x80000000UL) ||
++ (flags & (ID_OPT_PRINT_REAL | ID_OPT_ALL_GROUPS)) ||
++ ((flags & (ID_OPT_PRINT_REAL | ID_OPT_NAME_NOT_NUMBER)) ==
++ (ID_OPT_PRINT_REAL | ID_OPT_NAME_NOT_NUMBER))) {
+ bb_show_usage();
+ }
+
++#ifdef CONFIG_FEATURE_ID_GROUPS_ALIAS
++ /* groups command is an alias for 'id -Gn' */
++ if (bb_applet_name[0] == 'g') {
++ flags |= (ID_OPT_ALL_GROUPS + ID_OPT_NAME_NOT_NUMBER);
++ }
++#endif
++
++ uid = getuid();
++ gid = getgid();
++ euid = geteuid();
++ egid = getegid();
++
++ if (flags & ID_OPT_PRINT_REAL) {
++ euid = uid;
++ egid = gid;
++ }
++
+ if (argv[optind] == NULL) {
+- if (flags & PRINT_REAL) {
+- uid = getuid();
+- gid = getgid();
+- } else {
+- uid = geteuid();
+- gid = getegid();
+- }
+- my_getpwuid(user, uid);
++ usr = getpwuid(euid);
++ grp = getgrgid(egid);
+ } else {
+- safe_strncpy(user, argv[optind], sizeof(user));
+- gid = my_getpwnamegid(user);
++ usr = getpwnam(argv[optind]);
++ grp = getgrnam(argv[optind]);
+ }
+- my_getgrgid(group, gid);
+
+- pwnam=my_getpwnam(user);
+- grnam=my_getgrnam(group);
++ if (usr == NULL) {
++ bb_perror_msg_and_die("cannot find user name");
++ }
++ if (grp == NULL) {
++ bb_perror_msg_and_die("cannot find group name");
++ }
+
+- if (flags & (JUST_GROUP | JUST_USER)) {
+- char *s = group;
+- if (flags & JUST_USER) {
+- s = user;
+- grnam = pwnam;
++ if (flags & ID_OPT_JUST_USER) {
++ if (flags & ID_OPT_NAME_NOT_NUMBER) {
++ printf("%s", grp->gr_name);
++ } else {
++ printf("%u", euid);
+ }
+- if (flags & NAME_NOT_NUMBER) {
+- puts(s);
++ }
++ else if (flags & ID_OPT_JUST_GROUP) {
++ if (flags & ID_OPT_NAME_NOT_NUMBER) {
++ printf("%s", grp->gr_name);
+ } else {
+- printf("%ld\n", grnam);
++ printf("%u", egid);
+ }
++ }
++ else if (flags & ID_OPT_ALL_GROUPS) {
++ print_groups(flags, ' ');
+ } else {
+-#ifdef CONFIG_SELINUX
+- printf("uid=%ld(%s) gid=%ld(%s)", pwnam, user, grnam, group);
+- if(is_flask_enabled_flag)
+- {
+- security_id_t mysid = getsecsid();
+- 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
++ printf("uid=%u(%s) gid=%u(%s)", uid, usr->pw_name, gid, grp->gr_name);
++ if (uid != euid) {
++ struct passwd *eusr;
++ printf(" euid=%u", euid);
++ eusr = getpwuid(euid);
++ if (eusr != NULL) {
++ printf("(%s)", eusr->pw_name);
++ }
++ }
++ if (gid != egid) {
++ struct group *egrp;
++ printf(" egid=%u", egid);
++ egrp = getgrgid(egid);
++ if (egrp != NULL) {
++ printf("(%s)", egrp->gr_name);
++ }
++ }
++ printf(" groups=");
++ print_groups(flags, ',');
++ }
+
++#ifdef CONFIG_SELINUX
++ if (is_flask_enabled_flag)
++ {
++ security_id_t mysid = getsecsid();
++ char context[80];
++ int len = sizeof(context);
++
++ context[0] = '\0';
++ if (security_sid_to_context(mysid, len, &len)) {
++ strcpy(context, "unknown");
++ }
++ printf(" context=%s", context);
+ }
++#endif
+
++ putchar('\n');
+ bb_fflush_stdout_and_exit(0);
+ }
+Index: include/applets.h
+===================================================================
+RCS file: /var/cvs/busybox/include/applets.h,v
+retrieving revision 1.113
+diff -u -r1.113 applets.h
+--- a/include/applets.h 6 Apr 2004 16:59:43 -0000 1.113
++++ b/include/applets.h 1 May 2004 11:39:06 -0000
+@@ -232,6 +232,9 @@
+ #ifdef CONFIG_GREP
+ APPLET(grep, grep_main, _BB_DIR_BIN, _BB_SUID_NEVER)
+ #endif
++#if defined(CONFIG_FEATURE_ID_GROUPS_ALIAS)
++ APPLET(groups, id_main, _BB_DIR_USR_BIN, _BB_SUID_NEVER)
++#endif
+ #ifdef CONFIG_GUNZIP
+ APPLET(gunzip, gunzip_main, _BB_DIR_BIN, _BB_SUID_NEVER)
+ #endif
+Index: include/usage.h
+===================================================================
+RCS file: /var/cvs/busybox/include/usage.h,v
+retrieving revision 1.207
+diff -u -r1.207 usage.h
+--- a/include/usage.h 14 Apr 2004 17:59:21 -0000 1.207
++++ b/include/usage.h 1 May 2004 11:39:10 -0000
+@@ -800,6 +800,16 @@
+ "$ grep ^[rR]oo. /etc/passwd\n" \
+ "root:x:0:0:root:/root:/bin/bash\n"
+
++#define groups_trivial_usage \
++ " [USERNAME]"
++#define groups_full_usage \
++ "Print all group names that USERNAME is a member of."
++#define groups_example_usage \
++ "$ groups\n" \
++ "andersen users\n" \
++ "$ groups tjw\n" \
++ "tjw users\n"
++
+ #define gunzip_trivial_usage \
+ "[OPTION]... FILE"
+ #define gunzip_full_usage \
+@@ -1035,7 +1045,7 @@
+ #endif
+
+ #define id_trivial_usage \
+- "[OPTIONS]... [USERNAME]"
++ "[-Ggu[nr]]] [USERNAME]"
+ #define id_full_usage \
+ "Print information for USERNAME or the current user\n\n" \
+ "Options:\n" \
+@@ -1043,10 +1053,11 @@
+ "\t-g\tprints only the group ID\n" \
+ "\t-u\tprints only the user ID\n" \
+ "\t-n\tprint a name instead of a number\n" \
+- "\t-r\tprints the real user ID instead of the effective ID"
++ "\t-r\tprints the real user ID instead of the effective ID\n" \
++ "\t-G\tprints all groups the user belongs to"
+ #define id_example_usage \
+ "$ id\n" \
+- "uid=1000(andersen) gid=1000(andersen)\n"
++ "uid=1000(andersen) gid=1000(andersen) groups=1000(andersen),100(users)\n"
+
+ #ifdef CONFIG_FEATURE_IFCONFIG_SLIP
+ #define USAGE_SIOCSKEEPALIVE(a) a
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