1 /* vi: set sw=4 ts=4: */
3 * Mini id implementation for busybox
5 * Copyright (C) 2000 by Randolph Chung <tausq@debian.org>
7 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
10 /* BB_AUDIT SUSv3 _NOT_ compliant -- option -G is not currently supported. */
11 /* Hacked by Tito Ragusa (C) 2004 to handle usernames of whatever length and to
12 * be more similar to GNU id.
19 #include <sys/types.h>
22 #include <selinux/selinux.h> /* for is_selinux_enabled() */
26 #define NAME_NOT_NUMBER 2
30 static short printf_full(unsigned int id, const char *arg, const char prefix)
32 const char *fmt = "%cid=%u";
33 short status=EXIT_FAILURE;
39 bb_printf(fmt, prefix, id, arg);
43 int id_main(int argc, char **argv)
51 /* Don't allow -n -r -nr -ug -rug -nug -rnug */
52 /* Don't allow more than one username */
53 bb_opt_complementally = "?1:?:u--g:g--u:r?ug:n?ug";
54 flags = bb_getopt_ulflags(argc, argv, "rnug");
56 /* This values could be overwritten later */
59 if (flags & PRINT_REAL) {
65 p=getpwnam(argv[optind]);
66 /* bb_xgetpwnam is needed because it exits on failure */
67 uid = bb_xgetpwnam(argv[optind]);
69 /* in this case PRINT_REAL is the same */
72 if(flags & (JUST_GROUP | JUST_USER)) {
73 /* JUST_GROUP and JUST_USER are mutually exclusive */
74 if(flags & NAME_NOT_NUMBER) {
75 /* bb_getpwuid and bb_getgrgid exit on failure so puts cannot segfault */
76 puts((flags & JUST_USER) ? bb_getpwuid(NULL, uid, -1 ) : bb_getgrgid(NULL, gid, -1 ));
78 bb_printf("%u\n",(flags & JUST_USER) ? uid : gid);
81 bb_fflush_stdout_and_exit(EXIT_SUCCESS);
84 /* Print full info like GNU id */
85 /* bb_getpwuid doesn't exit on failure here */
86 status=printf_full(uid, bb_getpwuid(NULL, uid, 0), 'u');
88 /* bb_getgrgid doesn't exit on failure here */
89 status|=printf_full(gid, bb_getgrgid(NULL, gid, 0), 'g');
92 if ( is_selinux_enabled() ) {
93 security_context_t mysid;
95 int len = sizeof(context);
100 len = strlen(mysid)+1;
101 safe_strncpy(context, mysid, len);
104 safe_strncpy(context, "unknown",8);
106 bb_printf(" context=%s", context);
111 bb_fflush_stdout_and_exit(status);