| 1 | /* vi: set sw=4 ts=4: */
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| 2 | /*
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| 3 | * Copyright (C) 2003 by Glenn McGrath
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| 4 | * SELinux support: by Yuichi Nakamura <ynakam@hitachisoft.jp>
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| 5 | *
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| 6 | * Licensed under GPLv2 or later, see file LICENSE in this source tree.
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| 7 | */
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| 8 |
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| 9 | /* -v, -b, -c are ignored */
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| 10 | //usage:#define install_trivial_usage
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| 11 | //usage: "[-cdDsp] [-o USER] [-g GRP] [-m MODE] [SOURCE]... DEST"
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| 12 | //usage:#define install_full_usage "\n\n"
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| 13 | //usage: "Copy files and set attributes\n"
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| 14 | //usage: "\n -c Just copy (default)"
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| 15 | //usage: "\n -d Create directories"
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| 16 | //usage: "\n -D Create leading target directories"
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| 17 | //usage: "\n -s Strip symbol table"
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| 18 | //usage: "\n -p Preserve date"
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| 19 | //usage: "\n -o USER Set ownership"
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| 20 | //usage: "\n -g GRP Set group ownership"
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| 21 | //usage: "\n -m MODE Set permissions"
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| 22 | //usage: IF_SELINUX(
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| 23 | //usage: "\n -Z Set security context"
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| 24 | //usage: )
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| 25 |
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| 26 | #include "libbb.h"
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| 27 | #include "libcoreutils/coreutils.h"
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| 28 |
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| 29 | #if ENABLE_FEATURE_INSTALL_LONG_OPTIONS
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| 30 | static const char install_longopts[] ALIGN1 =
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| 31 | "directory\0" No_argument "d"
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| 32 | "preserve-timestamps\0" No_argument "p"
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| 33 | "strip\0" No_argument "s"
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| 34 | "group\0" Required_argument "g"
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| 35 | "mode\0" Required_argument "m"
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| 36 | "owner\0" Required_argument "o"
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| 37 | /* autofs build insists of using -b --suffix=.orig */
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| 38 | /* TODO? (short option for --suffix is -S) */
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| 39 | #if ENABLE_SELINUX
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| 40 | "context\0" Required_argument "Z"
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| 41 | "preserve_context\0" No_argument "\xff"
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| 42 | "preserve-context\0" No_argument "\xff"
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| 43 | #endif
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| 44 | ;
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| 45 | #endif
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| 46 |
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| 47 |
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| 48 | #if ENABLE_SELINUX
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| 49 | static void setdefaultfilecon(const char *path)
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| 50 | {
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| 51 | struct stat s;
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| 52 | security_context_t scontext = NULL;
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| 53 |
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| 54 | if (!is_selinux_enabled()) {
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| 55 | return;
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| 56 | }
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| 57 | if (lstat(path, &s) != 0) {
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| 58 | return;
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| 59 | }
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| 60 |
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| 61 | if (matchpathcon(path, s.st_mode, &scontext) < 0) {
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| 62 | goto out;
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| 63 | }
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| 64 | if (strcmp(scontext, "<<none>>") == 0) {
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| 65 | goto out;
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| 66 | }
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| 67 |
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| 68 | if (lsetfilecon(path, scontext) < 0) {
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| 69 | if (errno != ENOTSUP) {
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| 70 | bb_perror_msg("warning: can't change context"
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| 71 | " of %s to %s", path, scontext);
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| 72 | }
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| 73 | }
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| 74 |
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| 75 | out:
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| 76 | freecon(scontext);
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| 77 | }
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| 78 |
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| 79 | #endif
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| 80 |
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| 81 | int install_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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| 82 | int install_main(int argc, char **argv)
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| 83 | {
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| 84 | struct stat statbuf;
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| 85 | mode_t mode;
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| 86 | uid_t uid;
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| 87 | gid_t gid;
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| 88 | char *arg, *last;
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| 89 | const char *gid_str;
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| 90 | const char *uid_str;
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| 91 | const char *mode_str;
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| 92 | int copy_flags = FILEUTILS_DEREFERENCE | FILEUTILS_FORCE;
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| 93 | int opts;
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| 94 | int min_args = 1;
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| 95 | int ret = EXIT_SUCCESS;
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| 96 | int isdir = 0;
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| 97 | #if ENABLE_SELINUX
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| 98 | security_context_t scontext;
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| 99 | bool use_default_selinux_context = 1;
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| 100 | #endif
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| 101 | enum {
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| 102 | OPT_c = 1 << 0,
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| 103 | OPT_v = 1 << 1,
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| 104 | OPT_b = 1 << 2,
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| 105 | OPT_MKDIR_LEADING = 1 << 3,
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| 106 | OPT_DIRECTORY = 1 << 4,
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| 107 | OPT_PRESERVE_TIME = 1 << 5,
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| 108 | OPT_STRIP = 1 << 6,
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| 109 | OPT_GROUP = 1 << 7,
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| 110 | OPT_MODE = 1 << 8,
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| 111 | OPT_OWNER = 1 << 9,
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| 112 | #if ENABLE_SELINUX
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| 113 | OPT_SET_SECURITY_CONTEXT = 1 << 10,
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| 114 | OPT_PRESERVE_SECURITY_CONTEXT = 1 << 11,
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| 115 | #endif
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| 116 | };
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| 117 |
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| 118 | #if ENABLE_FEATURE_INSTALL_LONG_OPTIONS
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| 119 | applet_long_options = install_longopts;
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| 120 | #endif
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| 121 | opt_complementary = "s--d:d--s" IF_FEATURE_INSTALL_LONG_OPTIONS(IF_SELINUX(":Z--\xff:\xff--Z"));
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| 122 | /* -c exists for backwards compatibility, it's needed */
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| 123 | /* -v is ignored ("print name of each created directory") */
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| 124 | /* -b is ignored ("make a backup of each existing destination file") */
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| 125 | opts = getopt32(argv, "cvb" "Ddpsg:m:o:" IF_SELINUX("Z:"),
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| 126 | &gid_str, &mode_str, &uid_str IF_SELINUX(, &scontext));
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| 127 | argc -= optind;
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| 128 | argv += optind;
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| 129 |
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| 130 | #if ENABLE_SELINUX
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| 131 | if (opts & (OPT_PRESERVE_SECURITY_CONTEXT|OPT_SET_SECURITY_CONTEXT)) {
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| 132 | selinux_or_die();
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| 133 | use_default_selinux_context = 0;
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| 134 | if (opts & OPT_PRESERVE_SECURITY_CONTEXT) {
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| 135 | copy_flags |= FILEUTILS_PRESERVE_SECURITY_CONTEXT;
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| 136 | }
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| 137 | if (opts & OPT_SET_SECURITY_CONTEXT) {
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| 138 | setfscreatecon_or_die(scontext);
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| 139 | copy_flags |= FILEUTILS_SET_SECURITY_CONTEXT;
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| 140 | }
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| 141 | }
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| 142 | #endif
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| 143 |
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| 144 | /* preserve access and modification time, this is GNU behaviour,
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| 145 | * BSD only preserves modification time */
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| 146 | if (opts & OPT_PRESERVE_TIME) {
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| 147 | copy_flags |= FILEUTILS_PRESERVE_STATUS;
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| 148 | }
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| 149 | mode = 0755; /* GNU coreutils 6.10 compat */
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| 150 | if (opts & OPT_MODE)
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| 151 | bb_parse_mode(mode_str, &mode);
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| 152 | uid = (opts & OPT_OWNER) ? get_ug_id(uid_str, xuname2uid) : getuid();
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| 153 | gid = (opts & OPT_GROUP) ? get_ug_id(gid_str, xgroup2gid) : getgid();
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| 154 |
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| 155 | last = argv[argc - 1];
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| 156 | if (!(opts & OPT_DIRECTORY)) {
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| 157 | argv[argc - 1] = NULL;
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| 158 | min_args++;
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| 159 |
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| 160 | /* coreutils install resolves link in this case, don't use lstat */
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| 161 | isdir = stat(last, &statbuf) < 0 ? 0 : S_ISDIR(statbuf.st_mode);
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| 162 | }
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| 163 |
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| 164 | if (argc < min_args)
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| 165 | bb_show_usage();
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| 166 |
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| 167 | while ((arg = *argv++) != NULL) {
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| 168 | char *dest = last;
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| 169 | if (opts & OPT_DIRECTORY) {
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| 170 | dest = arg;
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| 171 | /* GNU coreutils 6.9 does not set uid:gid
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| 172 | * on intermediate created directories
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| 173 | * (only on last one) */
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| 174 | if (bb_make_directory(dest, 0755, FILEUTILS_RECUR)) {
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| 175 | ret = EXIT_FAILURE;
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| 176 | goto next;
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| 177 | }
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| 178 | } else {
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| 179 | if (opts & OPT_MKDIR_LEADING) {
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| 180 | char *ddir = xstrdup(dest);
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| 181 | bb_make_directory(dirname(ddir), 0755, FILEUTILS_RECUR);
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| 182 | /* errors are not checked. copy_file
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| 183 | * will fail if dir is not created. */
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| 184 | free(ddir);
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| 185 | }
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| 186 | if (isdir)
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| 187 | dest = concat_path_file(last, bb_basename(arg));
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| 188 | if (copy_file(arg, dest, copy_flags) != 0) {
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| 189 | /* copy is not made */
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| 190 | ret = EXIT_FAILURE;
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| 191 | goto next;
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| 192 | }
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| 193 | if (opts & OPT_STRIP) {
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| 194 | char *args[4];
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| 195 | args[0] = (char*)"strip";
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| 196 | args[1] = (char*)"-p"; /* -p --preserve-dates */
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| 197 | args[2] = dest;
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| 198 | args[3] = NULL;
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| 199 | if (spawn_and_wait(args)) {
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| 200 | bb_perror_msg("strip");
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| 201 | ret = EXIT_FAILURE;
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| 202 | }
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| 203 | }
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| 204 | }
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| 205 |
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| 206 | /* Set the file mode (always, not only with -m).
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| 207 | * GNU coreutils 6.10 is not affected by umask. */
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| 208 | if (chmod(dest, mode) == -1) {
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| 209 | bb_perror_msg("can't change %s of %s", "permissions", dest);
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| 210 | ret = EXIT_FAILURE;
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| 211 | }
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| 212 | #if ENABLE_SELINUX
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| 213 | if (use_default_selinux_context)
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| 214 | setdefaultfilecon(dest);
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| 215 | #endif
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| 216 | /* Set the user and group id */
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| 217 | if ((opts & (OPT_OWNER|OPT_GROUP))
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| 218 | && lchown(dest, uid, gid) == -1
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| 219 | ) {
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| 220 | bb_perror_msg("can't change %s of %s", "ownership", dest);
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| 221 | ret = EXIT_FAILURE;
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| 222 | }
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| 223 | next:
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| 224 | if (ENABLE_FEATURE_CLEAN_UP && isdir)
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| 225 | free(dest);
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| 226 | }
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| 227 |
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| 228 | return ret;
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| 229 | }
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