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] [SOURCE]... DEST"
  12 //usage:#define install_full_usage "\n\n"
  13 //usage:       "Copy files and set attributes\n"
  14 //usage:     "\nOptions:"
  15 //usage:     "\n        -c      Just copy (default)"
  16 //usage:     "\n        -d      Create directories"
  17 //usage:     "\n        -D      Create leading target directories"
  18 //usage:     "\n        -s      Strip symbol table"
  19 //usage:     "\n        -p      Preserve date"
  20 //usage:     "\n        -o USER Set ownership"
  21 //usage:     "\n        -g GRP  Set group ownership"
  22 //usage:     "\n        -m MODE Set permissions"
  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         "directory\0"           No_argument       "d"
  33         "preserve-timestamps\0" No_argument       "p"
  34         "strip\0"               No_argument       "s"
  35         "group\0"               Required_argument "g"
  36         "mode\0"                Required_argument "m"
  37         "owner\0"               Required_argument "o"
  38 /* autofs build insists of using -b --suffix=.orig */
  39 /* TODO? (short option for --suffix is -S) */
  40 #if ENABLE_SELINUX
  41         "context\0"             Required_argument "Z"
  42         "preserve_context\0"    No_argument       "\xff"
  43         "preserve-context\0"    No_argument       "\xff"
  44 #endif
  45         ;
  46 #endif
  47
  48
  49 #if ENABLE_SELINUX
  50 static void setdefaultfilecon(const char *path)
  51 {
  52         struct stat s;
  53         security_context_t scontext = NULL;
  54
  55         if (!is_selinux_enabled()) {
  56                 return;
  57         }
  58         if (lstat(path, &s) != 0) {
  59                 return;
  60         }
  61
  62         if (matchpathcon(path, s.st_mode, &scontext) < 0) {
  63                 goto out;
  64         }
  65         if (strcmp(scontext, "<<none>>") == 0) {
  66                 goto out;
  67         }
  68
  69         if (lsetfilecon(path, scontext) < 0) {
  70                 if (errno != ENOTSUP) {
  71                         bb_perror_msg("warning: can't change context"
  72                                         " of %s to %s", path, scontext);
  73                 }
  74         }
  75
  76  out:
  77         freecon(scontext);
  78 }
  79
  80 #endif
  81
  82 int install_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
  83 int install_main(int argc, char **argv)
  84 {
  85         struct stat statbuf;
  86         mode_t mode;
  87         uid_t uid;
  88         gid_t gid;
  89         char *arg, *last;
  90         const char *gid_str;
  91         const char *uid_str;
  92         const char *mode_str;
  93         int copy_flags = FILEUTILS_DEREFERENCE | FILEUTILS_FORCE;
  94         int opts;
  95         int min_args = 1;
  96         int ret = EXIT_SUCCESS;
  97         int isdir = 0;
  98 #if ENABLE_SELINUX
  99         security_context_t scontext;
 100         bool use_default_selinux_context = 1;
 101 #endif
 102         enum {
 103                 OPT_c             = 1 << 0,
 104                 OPT_v             = 1 << 1,
 105                 OPT_b             = 1 << 2,
 106                 OPT_MKDIR_LEADING = 1 << 3,
 107                 OPT_DIRECTORY     = 1 << 4,
 108                 OPT_PRESERVE_TIME = 1 << 5,
 109                 OPT_STRIP         = 1 << 6,
 110                 OPT_GROUP         = 1 << 7,
 111                 OPT_MODE          = 1 << 8,
 112                 OPT_OWNER         = 1 << 9,
 113 #if ENABLE_SELINUX
 114                 OPT_SET_SECURITY_CONTEXT = 1 << 10,
 115                 OPT_PRESERVE_SECURITY_CONTEXT = 1 << 11,
 116 #endif
 117         };
 118
 119 #if ENABLE_FEATURE_INSTALL_LONG_OPTIONS
 120         applet_long_options = install_longopts;
 121 #endif
 122         opt_complementary = "s--d:d--s" IF_FEATURE_INSTALL_LONG_OPTIONS(IF_SELINUX(":Z--\xff:\xff--Z"));
 123         /* -c exists for backwards compatibility, it's needed */
 124         /* -v is ignored ("print name of each created directory") */
 125         /* -b is ignored ("make a backup of each existing destination file") */
 126         opts = getopt32(argv, "cvb" "Ddpsg:m:o:" IF_SELINUX("Z:"),
 127                         &gid_str, &mode_str, &uid_str IF_SELINUX(, &scontext));
 128         argc -= optind;
 129         argv += optind;
 130
 131 #if ENABLE_SELINUX
 132         if (opts & (OPT_PRESERVE_SECURITY_CONTEXT|OPT_SET_SECURITY_CONTEXT)) {
 133                 selinux_or_die();
 134                 use_default_selinux_context = 0;
 135                 if (opts & OPT_PRESERVE_SECURITY_CONTEXT) {
 136                         copy_flags |= FILEUTILS_PRESERVE_SECURITY_CONTEXT;
 137                 }
 138                 if (opts & OPT_SET_SECURITY_CONTEXT) {
 139                         setfscreatecon_or_die(scontext);
 140                         copy_flags |= FILEUTILS_SET_SECURITY_CONTEXT;
 141                 }
 142         }
 143 #endif
 144
 145         /* preserve access and modification time, this is GNU behaviour,
 146          * BSD only preserves modification time */
 147         if (opts & OPT_PRESERVE_TIME) {
 148                 copy_flags |= FILEUTILS_PRESERVE_STATUS;
 149         }
 150         mode = 0755; /* GNU coreutils 6.10 compat */
 151         if (opts & OPT_MODE)
 152                 bb_parse_mode(mode_str, &mode);
 153         uid = (opts & OPT_OWNER) ? get_ug_id(uid_str, xuname2uid) : getuid();
 154         gid = (opts & OPT_GROUP) ? get_ug_id(gid_str, xgroup2gid) : getgid();
 155
 156         last = argv[argc - 1];
 157         if (!(opts & OPT_DIRECTORY)) {
 158                 argv[argc - 1] = NULL;
 159                 min_args++;
 160
 161                 /* coreutils install resolves link in this case, don't use lstat */
 162                 isdir = stat(last, &statbuf) < 0 ? 0 : S_ISDIR(statbuf.st_mode);
 163         }
 164
 165         if (argc < min_args)
 166                 bb_show_usage();
 167
 168         while ((arg = *argv++) != NULL) {
 169                 char *dest = last;
 170                 if (opts & OPT_DIRECTORY) {
 171                         dest = arg;
 172                         /* GNU coreutils 6.9 does not set uid:gid
 173                          * on intermediate created directories
 174                          * (only on last one) */
 175                         if (bb_make_directory(dest, 0755, FILEUTILS_RECUR)) {
 176                                 ret = EXIT_FAILURE;
 177                                 goto next;
 178                         }
 179                 } else {
 180                         if (opts & OPT_MKDIR_LEADING) {
 181                                 char *ddir = xstrdup(dest);
 182                                 bb_make_directory(dirname(ddir), 0755, FILEUTILS_RECUR);
 183                                 /* errors are not checked. copy_file
 184                                  * will fail if dir is not created. */
 185                                 free(ddir);
 186                         }
 187                         if (isdir)
 188                                 dest = concat_path_file(last, bb_basename(arg));
 189                         if (copy_file(arg, dest, copy_flags) != 0) {
 190                                 /* copy is not made */
 191                                 ret = EXIT_FAILURE;
 192                                 goto next;
 193                         }
 194                         if (opts & OPT_STRIP) {
 195                                 char *args[4];
 196                                 args[0] = (char*)"strip";
 197                                 args[1] = (char*)"-p"; /* -p --preserve-dates */
 198                                 args[2] = dest;
 199                                 args[3] = NULL;
 200                                 if (spawn_and_wait(args)) {
 201                                         bb_perror_msg("strip");
 202                                         ret = EXIT_FAILURE;
 203                                 }
 204                         }
 205                 }
 206
 207                 /* Set the file mode (always, not only with -m).
 208                  * GNU coreutils 6.10 is not affected by umask. */
 209                 if (chmod(dest, mode) == -1) {
 210                         bb_perror_msg("can't change %s of %s", "permissions", dest);
 211                         ret = EXIT_FAILURE;
 212                 }
 213 #if ENABLE_SELINUX
 214                 if (use_default_selinux_context)
 215                         setdefaultfilecon(dest);
 216 #endif
 217                 /* Set the user and group id */
 218                 if ((opts & (OPT_OWNER|OPT_GROUP))
 219                  && lchown(dest, uid, gid) == -1
 220                 ) {
 221                         bb_perror_msg("can't change %s of %s", "ownership", dest);
 222                         ret = EXIT_FAILURE;
 223                 }
 224  next:
 225                 if (ENABLE_FEATURE_CLEAN_UP && isdir)
 226                         free(dest);
 227         }
 228
 229         return ret;
 230 }