| /* id.c - print real and effective user and group IDs |
| * |
| * Copyright 2012 Sony Network Entertainment, Inc. |
| * |
| * by Tim Bird <tim.bird@am.sony.com> |
| * |
| * See http://opengroup.org/onlinepubs/9699919799/utilities/id.html |
| |
| 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] [USER...] |
| |
| Print user and group ID. |
| |
| -G Show all group IDs |
| -g Show only the effective group ID |
| -n Print names instead of numeric IDs (to be used with -Ggu) |
| -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 showone(char *prefix, char *s, unsigned u, int done) |
| { |
| if (FLAG(n)) printf("%s%s", prefix, s); |
| else printf("%s%u", prefix, u); |
| if (done) { |
| xputc('\n'); |
| xexit(); |
| } |
| } |
| |
| static void showid(char *prefix, unsigned u, char *s) |
| { |
| printf("%s%u(%s)", prefix, u, s); |
| } |
| |
| static void do_id(char *username) |
| { |
| struct passwd *pw; |
| struct group *grp; |
| uid_t uid = getuid(), euid = geteuid(); |
| gid_t gid = getgid(), egid = getegid(); |
| gid_t *groups = (gid_t *)toybuf; |
| int i = sizeof(toybuf)/sizeof(gid_t), ngroups; |
| |
| // check if a username is given |
| if (username) { |
| pw = getpwnam(username); |
| if (!pw) { |
| uid = atolx_range(username, 0, INT_MAX); |
| if ((pw = getpwuid(uid))) username = pw->pw_name; |
| } |
| if (!pw) error_exit("no such user '%s'", username); |
| uid = euid = pw->pw_uid; |
| gid = egid = pw->pw_gid; |
| if (TT.is_groups) printf("%s : ", pw->pw_name); |
| } |
| |
| pw = xgetpwuid(FLAG(r) ? uid : euid); |
| if (FLAG(u)) showone("", pw->pw_name, pw->pw_uid, 1); |
| |
| grp = xgetgrgid(FLAG(r) ? gid : egid); |
| if (FLAG(g)) showone("", grp->gr_name, grp->gr_gid, 1); |
| |
| ngroups = username ? getgrouplist(username, gid, groups, &i) |
| : getgroups(i, groups); |
| if (ngroups<0) perror_exit("getgroups"); |
| |
| if (FLAG(G)) { |
| showone("", grp->gr_name, grp->gr_gid, 0); |
| for (i = 0; i<ngroups; i++) { |
| if (groups[i] != egid) { |
| if ((grp=getgrgid(groups[i]))) showone(" ",grp->gr_name,grp->gr_gid,0); |
| else printf(" %u", groups[i]); |
| } |
| } |
| xputc('\n'); |
| return; |
| } |
| |
| if (!FLAG(Z)) { |
| showid("uid=", pw->pw_uid, pw->pw_name); |
| showid(" gid=", grp->gr_gid, grp->gr_name); |
| |
| if (!FLAG(r)) { |
| 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=", gid, grp->gr_name); |
| for (i = 0; i<ngroups; i++) { |
| if (groups[i] != egid) { |
| if ((grp=getgrgid(groups[i]))) showid(",", grp->gr_gid, grp->gr_name); |
| else printf(",%u", groups[i]); |
| } |
| } |
| } |
| |
| if (!CFG_TOYBOX_LSM_NONE) { |
| if (lsm_enabled()) { |
| char *context = lsm_context(); |
| |
| printf("%s%s", FLAG(Z) ? "" : " context=", context); |
| if (CFG_TOYBOX_FREE) free(context); |
| } else if (FLAG(Z)) error_exit("%s disabled", lsm_name()); |
| } |
| |
| xputc('\n'); |
| } |
| |
| void id_main(void) |
| { |
| if (toys.optc) while(*toys.optargs) do_id(*toys.optargs++); |
| else do_id(NULL); |
| } |
| |
| void groups_main(void) |
| { |
| TT.is_groups = 1; |
| toys.optflags = FLAG_G|FLAG_n; |
| id_main(); |
| } |
| |
| void logname_main(void) |
| { |
| toys.optflags = FLAG_u|FLAG_n; |
| id_main(); |
| } |