-/* vi: set sw=4 ts=4:
- *
- * id.c - print real and effective user and group IDs
+/* id.c - print real and effective user and group IDs
*
* Copyright 2012 Sony Network Entertainment, Inc.
*
*
* See http://opengroup.org/onlinepubs/9699919799/utilities/id.html
-USE_ID(NEWTOY(id, "nGgru", TOYFLAG_BIN))
+USE_ID(NEWTOY(id, ">1"USE_ID_Z("Z")"nGgru[!"USE_ID_Z("Z")"Ggu]", TOYFLAG_USR|TOYFLAG_BIN))
+USE_GROUPS(NEWTOY(groups, NULL, TOYFLAG_USR|TOYFLAG_BIN))
+USE_LOGNAME(NEWTOY(logname, ">0", TOYFLAG_USR|TOYFLAG_BIN))
+USE_WHOAMI(OLDTOY(whoami, logname, TOYFLAG_USR|TOYFLAG_BIN))
config ID
- bool "id"
- default y
- help
- usage: id [-nGgru]
-
- Print user and group ID.
-
- -n print names instead of numeric IDs (to be used with -Ggu)
- -G Show only the group IDs
- -g Show only the effective group ID
- -r Show real ID instead of effective ID
- -u Show only the effective user ID
+ bool "id"
+ default y
+ help
+ usage: id [-nGgru]
+
+ Print user and group ID.
+
+ -n print names instead of numeric IDs (to be used with -Ggu)
+ -G Show only the group IDs
+ -g Show only the effective group ID
+ -r Show real ID instead of effective ID
+ -u Show only the effective user ID
+
+config ID_Z
+ bool
+ default y
+ depends on ID && !TOYBOX_LSM_NONE
+ help
+ usage: id [-Z]
+
+ -Z Show only security context
+
+config GROUPS
+ bool "groups"
+ default y
+ help
+ usage: groups [user]
+
+ Print the groups a user is in.
+
+config LOGNAME
+ bool "logname"
+ default y
+ help
+ usage: logname
+
+ Print the current user name.
+
+config WHOAMI
+ bool "whoami"
+ default y
+ help
+ usage: whoami
+
+ Print the current user name.
*/
#define FOR_id
+#define FORCE_FLAGS
#include "toys.h"
+GLOBALS(
+ int is_groups;
+)
+
static void s_or_u(char *s, unsigned u, int done)
{
- if (toys.optflags & FLAG_n) printf("%s", s);
- else printf("%u", u);
- if (done) {
- xputc('\n');
- exit(0);
- }
+ if (toys.optflags&FLAG_n) printf("%s", s);
+ else printf("%u", u);
+ if (done) {
+ xputc('\n');
+ xexit();
+ }
}
static void showid(char *header, unsigned u, char *s)
{
- printf("%s%u(%s)", header, u, s);
+ printf("%s%u(%s)", header, u, s);
}
-struct passwd *xgetpwuid(uid_t uid)
+static void do_id(char *username)
{
- struct passwd *pwd = getpwuid(uid);
- if (!pwd) error_exit(NULL);
- return pwd;
+ int flags, i, ngroups;
+ struct passwd *pw;
+ struct group *grp;
+ uid_t uid = getuid(), euid = geteuid();
+ gid_t gid = getgid(), egid = getegid(), *groups;
+
+ flags = toys.optflags;
+
+ // check if a username is given
+ if (username) {
+ pw = xgetpwnam(username);
+ uid = euid = pw->pw_uid;
+ gid = egid = pw->pw_gid;
+ if (TT.is_groups) printf("%s : ", pw->pw_name);
+ }
+
+ i = flags & FLAG_r;
+ pw = xgetpwuid(i ? uid : euid);
+ if (toys.optflags&FLAG_u) s_or_u(pw->pw_name, pw->pw_uid, 1);
+
+ grp = xgetgrgid(i ? gid : egid);
+ if (flags & FLAG_g) s_or_u(grp->gr_name, grp->gr_gid, 1);
+
+ if (!(toys.optflags&(FLAG_g|FLAG_Z))) {
+ showid("uid=", pw->pw_uid, pw->pw_name);
+ showid(" gid=", grp->gr_gid, grp->gr_name);
+
+ if (!i) {
+ if (uid != euid) {
+ pw = xgetpwuid(euid);
+ showid(" euid=", pw->pw_uid, pw->pw_name);
+ }
+ if (gid != egid) {
+ grp = xgetgrgid(egid);
+ showid(" egid=", grp->gr_gid, grp->gr_name);
+ }
+ }
+
+ showid(" groups=", grp->gr_gid, grp->gr_name);
+ }
+
+ if (!(toys.optflags&FLAG_Z)) {
+ groups = (gid_t *)toybuf;
+ i = sizeof(toybuf)/sizeof(gid_t);
+ ngroups = username ? getgrouplist(username, gid, groups, &i)
+ : getgroups(i, groups);
+ if (ngroups<0) perror_exit(0);
+
+ int show_separator = !(toys.optflags&FLAG_G);
+ for (i = 0; i<ngroups; i++) {
+ if (show_separator) xputc((toys.optflags&FLAG_G) ? ' ' : ',');
+ show_separator = 1;
+ if (!(grp = getgrgid(groups[i]))) perror_msg(0);
+ else if (toys.optflags&FLAG_G) s_or_u(grp->gr_name, grp->gr_gid, 0);
+ else if (grp->gr_gid != egid) showid("", grp->gr_gid, grp->gr_name);
+ else show_separator = 0; // Because we didn't show anything this time.
+ }
+ if (toys.optflags&FLAG_G) {
+ xputc('\n');
+ xexit();
+ }
+ }
+
+ if (!CFG_TOYBOX_LSM_NONE) {
+ if (lsm_enabled()) {
+ char *context = lsm_context();
+
+ printf(" context=%s"+!!(toys.optflags&FLAG_Z), context);
+ if (CFG_TOYBOX_FREE) free(context);
+ } else if (toys.optflags&FLAG_Z) error_exit("%s disabled", lsm_name());
+ }
+
+ xputc('\n');
}
-struct group *xgetgrgid(gid_t gid)
+void id_main(void)
{
- struct group *group = getgrgid(gid);
- if (!group) error_exit(NULL);
- return group;
+ if (toys.optc) while(*toys.optargs) do_id(*toys.optargs++);
+ else do_id(NULL);
}
-void id_main(void)
+void groups_main(void)
+{
+ TT.is_groups = 1;
+ toys.optflags = FLAG_G|FLAG_n;
+ id_main();
+}
+
+void logname_main(void)
{
- int flags = toys.optflags, i, ngroups;
- struct passwd *pw;
- struct group *grp;
- uid_t uid = getuid(), euid = geteuid();
- gid_t gid = getgid(), egid = getegid(), *groups;
-
- /* check if a username is given */
- if (*toys.optargs) {
- if (!(pw = getpwnam(*toys.optargs)))
- error_exit("no such user '%s'", *toys.optargs);
- uid = euid = pw->pw_uid;
- gid = egid = pw->pw_gid;
- }
-
- i = toys.optflags & FLAG_r;
- pw = xgetpwuid(i ? uid : euid);
- if (flags & FLAG_u) s_or_u(pw->pw_name, pw->pw_uid, 1);
-
- grp = xgetgrgid(i ? gid : egid);
- if (flags & FLAG_g) s_or_u(grp->gr_name, grp->gr_gid, 1);
-
- if (!(flags & FLAG_G)) {
- showid("uid=", pw->pw_uid, pw->pw_name);
- showid(" gid=", grp->gr_gid, grp->gr_name);
-
- if (!i) {
- if (uid != euid) {
- pw = xgetpwuid(euid);
- showid(" euid=", pw->pw_uid, pw->pw_name);
- }
- if (gid != egid) {
- grp = xgetgrgid(egid);
- showid(" egid=", grp->gr_gid, grp->gr_name);
- }
- }
-
- showid(" groups=", grp->gr_gid, grp->gr_name);
- }
-
-
- groups = (gid_t *)toybuf;
- if (0 >= (ngroups = getgroups(sizeof(toybuf)/sizeof(gid_t), groups)))
- perror_exit(0);
-
- for (i = 0; i < ngroups; i++) {
- xputc(' ');
- if (!(grp = getgrgid(groups[i]))) perror_msg(0);
- else if (flags & FLAG_G)
- s_or_u(grp->gr_name, grp->gr_gid, 0);
- else if (grp->gr_gid != egid) showid("", grp->gr_gid, grp->gr_name);
- }
- xputc('\n');
+ toys.optflags = FLAG_u|FLAG_n;
+ id_main();
}
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