| 1 | /* vi: set sw=4 ts=4: */
|
|---|
| 2 | /*
|
|---|
| 3 | * Mini id implementation for busybox
|
|---|
| 4 | *
|
|---|
| 5 | * Copyright (C) 2000 by Randolph Chung <tausq@debian.org>
|
|---|
| 6 | *
|
|---|
| 7 | * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
|
|---|
| 8 | */
|
|---|
| 9 |
|
|---|
| 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.
|
|---|
| 13 | */
|
|---|
| 14 |
|
|---|
| 15 | #include "busybox.h"
|
|---|
| 16 | #include "pwd_.h"
|
|---|
| 17 | #include <stdio.h>
|
|---|
| 18 | #include <unistd.h>
|
|---|
| 19 | #include <sys/types.h>
|
|---|
| 20 |
|
|---|
| 21 | #ifdef CONFIG_SELINUX
|
|---|
| 22 | #include <selinux/selinux.h> /* for is_selinux_enabled() */
|
|---|
| 23 | #endif
|
|---|
| 24 |
|
|---|
| 25 | #define PRINT_REAL 1
|
|---|
| 26 | #define NAME_NOT_NUMBER 2
|
|---|
| 27 | #define JUST_USER 4
|
|---|
| 28 | #define JUST_GROUP 8
|
|---|
| 29 |
|
|---|
| 30 | static short printf_full(unsigned int id, const char *arg, const char prefix)
|
|---|
| 31 | {
|
|---|
| 32 | const char *fmt = "%cid=%u";
|
|---|
| 33 | short status=EXIT_FAILURE;
|
|---|
| 34 |
|
|---|
| 35 | if(arg) {
|
|---|
| 36 | fmt = "%cid=%u(%s)";
|
|---|
| 37 | status=EXIT_SUCCESS;
|
|---|
| 38 | }
|
|---|
| 39 | bb_printf(fmt, prefix, id, arg);
|
|---|
| 40 | return status;
|
|---|
| 41 | }
|
|---|
| 42 |
|
|---|
| 43 | int id_main(int argc, char **argv)
|
|---|
| 44 | {
|
|---|
| 45 | struct passwd *p;
|
|---|
| 46 | uid_t uid;
|
|---|
| 47 | gid_t gid;
|
|---|
| 48 | unsigned long flags;
|
|---|
| 49 | short status;
|
|---|
| 50 |
|
|---|
| 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");
|
|---|
| 55 |
|
|---|
| 56 | /* This values could be overwritten later */
|
|---|
| 57 | uid = geteuid();
|
|---|
| 58 | gid = getegid();
|
|---|
| 59 | if (flags & PRINT_REAL) {
|
|---|
| 60 | uid = getuid();
|
|---|
| 61 | gid = getgid();
|
|---|
| 62 | }
|
|---|
| 63 |
|
|---|
| 64 | if(argv[optind]) {
|
|---|
| 65 | p=getpwnam(argv[optind]);
|
|---|
| 66 | /* bb_xgetpwnam is needed because it exits on failure */
|
|---|
| 67 | uid = bb_xgetpwnam(argv[optind]);
|
|---|
| 68 | gid = p->pw_gid;
|
|---|
| 69 | /* in this case PRINT_REAL is the same */
|
|---|
| 70 | }
|
|---|
| 71 |
|
|---|
| 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 ));
|
|---|
| 77 | } else {
|
|---|
| 78 | bb_printf("%u\n",(flags & JUST_USER) ? uid : gid);
|
|---|
| 79 | }
|
|---|
| 80 | /* exit */
|
|---|
| 81 | bb_fflush_stdout_and_exit(EXIT_SUCCESS);
|
|---|
| 82 | }
|
|---|
| 83 |
|
|---|
| 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');
|
|---|
| 87 | putchar(' ');
|
|---|
| 88 | /* bb_getgrgid doesn't exit on failure here */
|
|---|
| 89 | status|=printf_full(gid, bb_getgrgid(NULL, gid, 0), 'g');
|
|---|
| 90 |
|
|---|
| 91 | #ifdef CONFIG_SELINUX
|
|---|
| 92 | if ( is_selinux_enabled() ) {
|
|---|
| 93 | security_context_t mysid;
|
|---|
| 94 | char context[80];
|
|---|
| 95 | int len = sizeof(context);
|
|---|
| 96 |
|
|---|
| 97 | getcon(&mysid);
|
|---|
| 98 | context[0] = '\0';
|
|---|
| 99 | if (mysid) {
|
|---|
| 100 | len = strlen(mysid)+1;
|
|---|
| 101 | safe_strncpy(context, mysid, len);
|
|---|
| 102 | freecon(mysid);
|
|---|
| 103 | }else{
|
|---|
| 104 | safe_strncpy(context, "unknown",8);
|
|---|
| 105 | }
|
|---|
| 106 | bb_printf(" context=%s", context);
|
|---|
| 107 | }
|
|---|
| 108 | #endif
|
|---|
| 109 |
|
|---|
| 110 | putchar('\n');
|
|---|
| 111 | bb_fflush_stdout_and_exit(status);
|
|---|
| 112 | }
|
|---|
