coreutils/install.c

   1 /* vi: set sw=4 ts=4: */
   2 /*
   3  * Copyright (C) 2003 by Glenn McGrath
   4  * SELinux support: by Yuichi Nakamura <ynakam@hitachisoft.jp>
   5  *
   6  * Licensed under GPLv2 or later, see file LICENSE in this source tree.
   7  */
   8
   9 /* -v, -b, -c are ignored */
  10 //usage:#define install_trivial_usage
  11 //usage:        "[-cdDsp] [-o USER] [-g GRP] [-m MODE] [-t DIR] [SOURCE]... DEST"
  12 //usage:#define install_full_usage "\n\n"
  13 //usage:       "Copy files and set attributes\n"
  14 //usage:     "\n        -c      Just copy (default)"
  15 //usage:     "\n        -d      Create directories"
  16 //usage:     "\n        -D      Create leading target directories"
  17 //usage:     "\n        -s      Strip symbol table"
  18 //usage:     "\n        -p      Preserve date"
  19 //usage:     "\n        -o USER Set ownership"
  20 //usage:     "\n        -g GRP  Set group ownership"
  21 //usage:     "\n        -m MODE Set permissions"
  22 //usage:     "\n        -t DIR  Install to DIR"
  23 //usage:        IF_SELINUX(
  24 //usage:     "\n        -Z      Set security context"
  25 //usage:        )
  26
  27 #include "libbb.h"
  28 #include "libcoreutils/coreutils.h"
  29
  30 #if ENABLE_FEATURE_INSTALL_LONG_OPTIONS
  31 static const char install_longopts[] ALIGN1 =
  32         IF_FEATURE_VERBOSE(
  33         "verbose\0"             No_argument       "v"
  34         )
  35         "directory\0"           No_argument       "d"
  36         "preserve-timestamps\0" No_argument       "p"
  37         "strip\0"               No_argument       "s"
  38         "group\0"               Required_argument "g"
  39         "mode\0"                Required_argument "m"
  40         "owner\0"               Required_argument "o"
  41         "target-directory\0"    Required_argument "t"
  42 /* autofs build insists of using -b --suffix=.orig */
  43 /* TODO? (short option for --suffix is -S) */
  44 #if ENABLE_SELINUX
  45         "context\0"             Required_argument "Z"
  46         "preserve_context\0"    No_argument       "\xff"
  47         "preserve-context\0"    No_argument       "\xff"
  48 #endif
  49         ;
  50 #endif
  51
  52
  53 #if ENABLE_SELINUX
  54 static void setdefaultfilecon(const char *path)
  55 {
  56         struct stat s;
  57         security_context_t scontext = NULL;
  58
  59         if (!is_selinux_enabled()) {
  60                 return;
  61         }
  62         if (lstat(path, &s) != 0) {
  63                 return;
  64         }
  65
  66         if (matchpathcon(path, s.st_mode, &scontext) < 0) {
  67                 goto out;
  68         }
  69         if (strcmp(scontext, "<<none>>") == 0) {
  70                 goto out;
  71         }
  72
  73         if (lsetfilecon(path, scontext) < 0) {
  74                 if (errno != ENOTSUP) {
  75                         bb_perror_msg("warning: can't change context"
  76                                         " of %s to %s", path, scontext);
  77                 }
  78         }
  79
  80  out:
  81         freecon(scontext);
  82 }
  83
  84 #endif
  85
  86 int install_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
  87 int install_main(int argc, char **argv)
  88 {
  89         struct stat statbuf;
  90         mode_t mode;
  91         uid_t uid;
  92         gid_t gid;
  93         char *arg, *last;
  94         const char *gid_str;
  95         const char *uid_str;
  96         const char *mode_str;
  97         int mkdir_flags = FILEUTILS_RECUR;
  98         int copy_flags = FILEUTILS_DEREFERENCE | FILEUTILS_FORCE;
  99         int opts;
 100         int ret = EXIT_SUCCESS;
 101         int isdir;
 102 #if ENABLE_SELINUX
 103         security_context_t scontext;
 104         bool use_default_selinux_context = 1;
 105 #endif
 106         enum {
 107                 OPT_c             = 1 << 0,
 108                 OPT_v             = 1 << 1,
 109                 OPT_b             = 1 << 2,
 110                 OPT_MKDIR_LEADING = 1 << 3,
 111                 OPT_DIRECTORY     = 1 << 4,
 112                 OPT_PRESERVE_TIME = 1 << 5,
 113                 OPT_STRIP         = 1 << 6,
 114                 OPT_GROUP         = 1 << 7,
 115                 OPT_MODE          = 1 << 8,
 116                 OPT_OWNER         = 1 << 9,
 117                 OPT_TARGET        = 1 << 10,
 118 #if ENABLE_SELINUX
 119                 OPT_SET_SECURITY_CONTEXT = 1 << 11,
 120                 OPT_PRESERVE_SECURITY_CONTEXT = 1 << 12,
 121 #endif
 122         };
 123
 124 #if ENABLE_FEATURE_INSTALL_LONG_OPTIONS
 125         applet_long_options = install_longopts;
 126 #endif
 127         opt_complementary = "t--d:d--t:s--d:d--s" IF_FEATURE_INSTALL_LONG_OPTIONS(IF_SELINUX(":Z--\xff:\xff--Z"));
 128         /* -c exists for backwards compatibility, it's needed */
 129         /* -b is ignored ("make a backup of each existing destination file") */
 130         opts = getopt32(argv, "cvb" "Ddpsg:m:o:t:" IF_SELINUX("Z:"),
 131                         &gid_str, &mode_str, &uid_str, &last
 132                         IF_SELINUX(, &scontext));
 133         argc -= optind;
 134         argv += optind;
 135
 136 #if ENABLE_SELINUX
 137         if (opts & (OPT_PRESERVE_SECURITY_CONTEXT|OPT_SET_SECURITY_CONTEXT)) {
 138                 selinux_or_die();
 139                 use_default_selinux_context = 0;
 140                 if (opts & OPT_PRESERVE_SECURITY_CONTEXT) {
 141                         copy_flags |= FILEUTILS_PRESERVE_SECURITY_CONTEXT;
 142                 }
 143                 if (opts & OPT_SET_SECURITY_CONTEXT) {
 144                         setfscreatecon_or_die(scontext);
 145                         copy_flags |= FILEUTILS_SET_SECURITY_CONTEXT;
 146                 }
 147         }
 148 #endif
 149
 150         if ((opts & OPT_v) && FILEUTILS_VERBOSE) {
 151                 mkdir_flags |= FILEUTILS_VERBOSE;
 152                 copy_flags |= FILEUTILS_VERBOSE;
 153         }
 154
 155         /* preserve access and modification time, this is GNU behaviour,
 156          * BSD only preserves modification time */
 157         if (opts & OPT_PRESERVE_TIME) {
 158                 copy_flags |= FILEUTILS_PRESERVE_STATUS;
 159         }
 160         mode = 0755; /* GNU coreutils 6.10 compat */
 161         if (opts & OPT_MODE)
 162                 mode = bb_parse_mode(mode_str, mode);
 163         uid = (opts & OPT_OWNER) ? get_ug_id(uid_str, xuname2uid) : getuid();
 164         gid = (opts & OPT_GROUP) ? get_ug_id(gid_str, xgroup2gid) : getgid();
 165
 166         /* If -t DIR is in use, then isdir=true, last="DIR" */
 167         isdir = (opts & OPT_TARGET);
 168         if (!(opts & (OPT_TARGET|OPT_DIRECTORY))) {
 169                 /* Neither -t DIR nor -d is in use */
 170                 argc--;
 171                 last = argv[argc];
 172                 argv[argc] = NULL;
 173                 /* coreutils install resolves link in this case, don't use lstat */
 174                 isdir = stat(last, &statbuf) < 0 ? 0 : S_ISDIR(statbuf.st_mode);
 175         }
 176
 177         if (argc < 1)
 178                 bb_show_usage();
 179
 180         while ((arg = *argv++) != NULL) {
 181                 char *dest;
 182
 183                 if (opts & OPT_DIRECTORY) {
 184                         dest = arg;
 185                         /* GNU coreutils 6.9 does not set uid:gid
 186                          * on intermediate created directories
 187                          * (only on last one) */
 188                         if (bb_make_directory(dest, 0755, mkdir_flags)) {
 189                                 ret = EXIT_FAILURE;
 190                                 goto next;
 191                         }
 192                 } else {
 193                         dest = last;
 194                         if (opts & OPT_MKDIR_LEADING) {
 195                                 char *ddir = xstrdup(dest);
 196                                 bb_make_directory(dirname(ddir), 0755, mkdir_flags);
 197                                 /* errors are not checked. copy_file
 198                                  * will fail if dir is not created. */
 199                                 free(ddir);
 200                         }
 201                         if (isdir)
 202                                 dest = concat_path_file(last, bb_basename(arg));
 203                         if (copy_file(arg, dest, copy_flags) != 0) {
 204                                 /* copy is not made */
 205                                 ret = EXIT_FAILURE;
 206                                 goto next;
 207                         }
 208                         if (opts & OPT_STRIP) {
 209                                 char *args[4];
 210                                 args[0] = (char*)"strip";
 211                                 args[1] = (char*)"-p"; /* -p --preserve-dates */
 212                                 args[2] = dest;
 213                                 args[3] = NULL;
 214                                 if (spawn_and_wait(args)) {
 215                                         bb_perror_msg("strip");
 216                                         ret = EXIT_FAILURE;
 217                                 }
 218                         }
 219                 }
 220
 221                 /* Set the file mode (always, not only with -m).
 222                  * GNU coreutils 6.10 is not affected by umask. */
 223                 if (chmod(dest, mode) == -1) {
 224                         bb_perror_msg("can't change %s of %s", "permissions", dest);
 225                         ret = EXIT_FAILURE;
 226                 }
 227 #if ENABLE_SELINUX
 228                 if (use_default_selinux_context)
 229                         setdefaultfilecon(dest);
 230 #endif
 231                 /* Set the user and group id */
 232                 if ((opts & (OPT_OWNER|OPT_GROUP))
 233                  && lchown(dest, uid, gid) == -1
 234                 ) {
 235                         bb_perror_msg("can't change %s of %s", "ownership", dest);
 236                         ret = EXIT_FAILURE;
 237                 }
 238  next:
 239                 if (ENABLE_FEATURE_CLEAN_UP && isdir)
 240                         free(dest);
 241         }
 242
 243         return ret;
 244 }