Erik Andersen | 94f5e0b | 2000-05-01 19:10:52 +0000 | [diff] [blame] | 1 | /* vi: set sw=4 ts=4: */ |
| 2 | /* |
| 3 | * Mini id implementation for busybox |
| 4 | * |
Erik Andersen | 94f5e0b | 2000-05-01 19:10:52 +0000 | [diff] [blame] | 5 | * Copyright (C) 2000 by Randolph Chung <tausq@debian.org> |
| 6 | * |
Bernhard Reutner-Fischer | b1629b1 | 2006-05-19 19:29:19 +0000 | [diff] [blame] | 7 | * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. |
Erik Andersen | 94f5e0b | 2000-05-01 19:10:52 +0000 | [diff] [blame] | 8 | */ |
| 9 | |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 10 | /* BB_AUDIT SUSv3 _NOT_ compliant -- option -G is not currently supported. */ |
Eric Andersen | 7eb79ff | 2004-09-02 22:21:41 +0000 | [diff] [blame] | 11 | /* Hacked by Tito Ragusa (C) 2004 to handle usernames of whatever length and to |
"Vladimir N. Oleynik" | 064f04e | 2005-10-11 14:38:01 +0000 | [diff] [blame] | 12 | * be more similar to GNU id. |
Eric Andersen | 7eb79ff | 2004-09-02 22:21:41 +0000 | [diff] [blame] | 13 | */ |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 14 | |
Eric Andersen | 3570a34 | 2000-09-25 21:45:58 +0000 | [diff] [blame] | 15 | #include "busybox.h" |
Eric Andersen | 7eb79ff | 2004-09-02 22:21:41 +0000 | [diff] [blame] | 16 | #include "pwd_.h" |
Erik Andersen | 94f5e0b | 2000-05-01 19:10:52 +0000 | [diff] [blame] | 17 | #include <stdio.h> |
| 18 | #include <unistd.h> |
Erik Andersen | 94f5e0b | 2000-05-01 19:10:52 +0000 | [diff] [blame] | 19 | #include <sys/types.h> |
Eric Andersen | 7eb79ff | 2004-09-02 22:21:41 +0000 | [diff] [blame] | 20 | |
Eric Andersen | 9e48045 | 2003-07-03 10:07:04 +0000 | [diff] [blame] | 21 | #ifdef CONFIG_SELINUX |
Rob Landley | 60158cb | 2005-05-03 06:25:50 +0000 | [diff] [blame] | 22 | #include <selinux/selinux.h> /* for is_selinux_enabled() */ |
Eric Andersen | 9e48045 | 2003-07-03 10:07:04 +0000 | [diff] [blame] | 23 | #endif |
Erik Andersen | 94f5e0b | 2000-05-01 19:10:52 +0000 | [diff] [blame] | 24 | |
Eric Andersen | 7eb79ff | 2004-09-02 22:21:41 +0000 | [diff] [blame] | 25 | #define PRINT_REAL 1 |
| 26 | #define NAME_NOT_NUMBER 2 |
| 27 | #define JUST_USER 4 |
| 28 | #define JUST_GROUP 8 |
| 29 | |
Glenn L McGrath | f15dfc5 | 2004-09-15 03:04:08 +0000 | [diff] [blame] | 30 | static short printf_full(unsigned int id, const char *arg, const char prefix) |
"Vladimir N. Oleynik" | 064f04e | 2005-10-11 14:38:01 +0000 | [diff] [blame] | 31 | { |
Glenn L McGrath | f15dfc5 | 2004-09-15 03:04:08 +0000 | [diff] [blame] | 32 | const char *fmt = "%cid=%u"; |
| 33 | short status=EXIT_FAILURE; |
"Vladimir N. Oleynik" | 064f04e | 2005-10-11 14:38:01 +0000 | [diff] [blame] | 34 | |
Glenn L McGrath | f15dfc5 | 2004-09-15 03:04:08 +0000 | [diff] [blame] | 35 | if(arg) { |
| 36 | fmt = "%cid=%u(%s)"; |
| 37 | status=EXIT_SUCCESS; |
| 38 | } |
| 39 | bb_printf(fmt, prefix, id, arg); |
| 40 | return status; |
Eric Andersen | 7eb79ff | 2004-09-02 22:21:41 +0000 | [diff] [blame] | 41 | } |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 42 | |
Rob Landley | dfba741 | 2006-03-06 20:47:33 +0000 | [diff] [blame] | 43 | int id_main(int argc, char **argv) |
Erik Andersen | 94f5e0b | 2000-05-01 19:10:52 +0000 | [diff] [blame] | 44 | { |
Eric Andersen | 7eb79ff | 2004-09-02 22:21:41 +0000 | [diff] [blame] | 45 | struct passwd *p; |
Eric Andersen | 7eb79ff | 2004-09-02 22:21:41 +0000 | [diff] [blame] | 46 | uid_t uid; |
| 47 | gid_t gid; |
Glenn L McGrath | f15dfc5 | 2004-09-15 03:04:08 +0000 | [diff] [blame] | 48 | unsigned long flags; |
| 49 | short status; |
Eric Andersen | c7bda1c | 2004-03-15 08:29:22 +0000 | [diff] [blame] | 50 | |
"Vladimir N. Oleynik" | 064f04e | 2005-10-11 14:38:01 +0000 | [diff] [blame] | 51 | /* Don't allow -n -r -nr -ug -rug -nug -rnug */ |
Glenn L McGrath | f15dfc5 | 2004-09-15 03:04:08 +0000 | [diff] [blame] | 52 | /* Don't allow more than one username */ |
Denis Vlasenko | 67b23e6 | 2006-10-03 21:00:06 +0000 | [diff] [blame^] | 53 | opt_complementary = "?1:?:u--g:g--u:r?ug:n?ug"; |
| 54 | flags = getopt32(argc, argv, "rnug"); |
"Vladimir N. Oleynik" | 064f04e | 2005-10-11 14:38:01 +0000 | [diff] [blame] | 55 | |
Eric Andersen | 7eb79ff | 2004-09-02 22:21:41 +0000 | [diff] [blame] | 56 | /* This values could be overwritten later */ |
| 57 | uid = geteuid(); |
| 58 | gid = getegid(); |
| 59 | if (flags & PRINT_REAL) { |
| 60 | uid = getuid(); |
| 61 | gid = getgid(); |
Erik Andersen | 94f5e0b | 2000-05-01 19:10:52 +0000 | [diff] [blame] | 62 | } |
"Vladimir N. Oleynik" | 064f04e | 2005-10-11 14:38:01 +0000 | [diff] [blame] | 63 | |
Glenn L McGrath | f15dfc5 | 2004-09-15 03:04:08 +0000 | [diff] [blame] | 64 | if(argv[optind]) { |
Eric Andersen | 7eb79ff | 2004-09-02 22:21:41 +0000 | [diff] [blame] | 65 | p=getpwnam(argv[optind]); |
Bernhard Reutner-Fischer | d5bd137 | 2005-09-20 21:06:17 +0000 | [diff] [blame] | 66 | /* bb_xgetpwnam is needed because it exits on failure */ |
| 67 | uid = bb_xgetpwnam(argv[optind]); |
Eric Andersen | 7eb79ff | 2004-09-02 22:21:41 +0000 | [diff] [blame] | 68 | gid = p->pw_gid; |
"Vladimir N. Oleynik" | 064f04e | 2005-10-11 14:38:01 +0000 | [diff] [blame] | 69 | /* in this case PRINT_REAL is the same */ |
Erik Andersen | 94f5e0b | 2000-05-01 19:10:52 +0000 | [diff] [blame] | 70 | } |
| 71 | |
Glenn L McGrath | f15dfc5 | 2004-09-15 03:04:08 +0000 | [diff] [blame] | 72 | if(flags & (JUST_GROUP | JUST_USER)) { |
| 73 | /* JUST_GROUP and JUST_USER are mutually exclusive */ |
| 74 | if(flags & NAME_NOT_NUMBER) { |
Bernhard Reutner-Fischer | d5bd137 | 2005-09-20 21:06:17 +0000 | [diff] [blame] | 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 )); |
Glenn L McGrath | f15dfc5 | 2004-09-15 03:04:08 +0000 | [diff] [blame] | 77 | } else { |
| 78 | bb_printf("%u\n",(flags & JUST_USER) ? uid : gid); |
| 79 | } |
"Vladimir N. Oleynik" | 064f04e | 2005-10-11 14:38:01 +0000 | [diff] [blame] | 80 | /* exit */ |
Eric Andersen | 7eb79ff | 2004-09-02 22:21:41 +0000 | [diff] [blame] | 81 | bb_fflush_stdout_and_exit(EXIT_SUCCESS); |
Eric Andersen | c1b8f12 | 2001-01-25 05:12:02 +0000 | [diff] [blame] | 82 | } |
Glenn L McGrath | f15dfc5 | 2004-09-15 03:04:08 +0000 | [diff] [blame] | 83 | |
Eric Andersen | 7eb79ff | 2004-09-02 22:21:41 +0000 | [diff] [blame] | 84 | /* Print full info like GNU id */ |
Bernhard Reutner-Fischer | d5bd137 | 2005-09-20 21:06:17 +0000 | [diff] [blame] | 85 | /* bb_getpwuid doesn't exit on failure here */ |
| 86 | status=printf_full(uid, bb_getpwuid(NULL, uid, 0), 'u'); |
Glenn L McGrath | f15dfc5 | 2004-09-15 03:04:08 +0000 | [diff] [blame] | 87 | putchar(' '); |
Bernhard Reutner-Fischer | d5bd137 | 2005-09-20 21:06:17 +0000 | [diff] [blame] | 88 | /* bb_getgrgid doesn't exit on failure here */ |
| 89 | status|=printf_full(gid, bb_getgrgid(NULL, gid, 0), 'g'); |
Rob Landley | 60158cb | 2005-05-03 06:25:50 +0000 | [diff] [blame] | 90 | |
Eric Andersen | 7eb79ff | 2004-09-02 22:21:41 +0000 | [diff] [blame] | 91 | #ifdef CONFIG_SELINUX |
Rob Landley | 60158cb | 2005-05-03 06:25:50 +0000 | [diff] [blame] | 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 | } |
Glenn L McGrath | f15dfc5 | 2004-09-15 03:04:08 +0000 | [diff] [blame] | 106 | bb_printf(" context=%s", context); |
Eric Andersen | 7eb79ff | 2004-09-02 22:21:41 +0000 | [diff] [blame] | 107 | } |
| 108 | #endif |
Rob Landley | 60158cb | 2005-05-03 06:25:50 +0000 | [diff] [blame] | 109 | |
Glenn L McGrath | f15dfc5 | 2004-09-15 03:04:08 +0000 | [diff] [blame] | 110 | putchar('\n'); |
| 111 | bb_fflush_stdout_and_exit(status); |
Erik Andersen | 94f5e0b | 2000-05-01 19:10:52 +0000 | [diff] [blame] | 112 | } |