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 //config:config INSTALL
   9 //config:       bool "install (12 kb)"
  10 //config:       default y
  11 //config:       help
  12 //config:       Copy files and set attributes.
  13 //config:
  14 //config:config FEATURE_INSTALL_LONG_OPTIONS
  15 //config:       bool "Enable long options"
  16 //config:       default y
  17 //config:       depends on INSTALL && LONG_OPTS
  18
  19 //applet:IF_INSTALL(APPLET(install, BB_DIR_USR_BIN, BB_SUID_DROP))
  20
  21 //kbuild:lib-$(CONFIG_INSTALL) += install.o
  22
  23 /* -v, -b, -c are ignored */
  24 //usage:#define install_trivial_usage
  25 //usage:        "[-cdDsp] [-o USER] [-g GRP] [-m MODE] [-t DIR] [SOURCE]... DEST"
  26 //usage:#define install_full_usage "\n\n"
  27 //usage:       "Copy files and set attributes\n"
  28 //usage:     "\n        -c      Just copy (default)"
  29 //usage:     "\n        -d      Create directories"
  30 //usage:     "\n        -D      Create leading target directories"
  31 //usage:     "\n        -s      Strip symbol table"
  32 //usage:     "\n        -p      Preserve date"
  33 //usage:     "\n        -o USER Set ownership"
  34 //usage:     "\n        -g GRP  Set group ownership"
  35 //usage:     "\n        -m MODE Set permissions"
  36 //usage:     "\n        -t DIR  Install to DIR"
  37 //usage:        IF_SELINUX(
  38 //usage:     "\n        -Z      Set security context"
  39 //usage:        )
  40
  41 #include "libbb.h"
  42 #include "libcoreutils/coreutils.h"
  43
  44 #if ENABLE_FEATURE_INSTALL_LONG_OPTIONS
  45 static const char install_longopts[] ALIGN1 =
  46         IF_FEATURE_VERBOSE(
  47         "verbose\0"             No_argument       "v"
  48         )
  49         "directory\0"           No_argument       "d"
  50         "preserve-timestamps\0" No_argument       "p"
  51         "strip\0"               No_argument       "s"
  52         "group\0"               Required_argument "g"
  53         "mode\0"                Required_argument "m"
  54         "owner\0"               Required_argument "o"
  55         "target-directory\0"    Required_argument "t"
  56 /* autofs build insists of using -b --suffix=.orig */
  57 /* TODO? (short option for --suffix is -S) */
  58 #if ENABLE_SELINUX
  59         "context\0"             Required_argument "Z"
  60         "preserve_context\0"    No_argument       "\xff"
  61         "preserve-context\0"    No_argument       "\xff"
  62 #endif
  63         ;
  64 #endif
  65
  66
  67 #if ENABLE_SELINUX
  68 static void setdefaultfilecon(const char *path)
  69 {
  70         struct stat s;
  71         security_context_t scontext = NULL;
  72
  73         if (!is_selinux_enabled()) {
  74                 return;
  75         }
  76         if (lstat(path, &s) != 0) {
  77                 return;
  78         }
  79
  80         if (matchpathcon(path, s.st_mode, &scontext) < 0) {
  81                 goto out;
  82         }
  83         if (strcmp(scontext, "<<none>>") == 0) {
  84                 goto out;
  85         }
  86
  87         if (lsetfilecon(path, scontext) < 0) {
  88                 if (errno != ENOTSUP) {
  89                         bb_perror_msg("warning: can't change context"
  90                                         " of %s to %s", path, scontext);
  91                 }
  92         }
  93
  94  out:
  95         freecon(scontext);
  96 }
  97
  98 #endif
  99
 100 int install_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 101 int install_main(int argc, char **argv)
 102 {
 103         struct stat statbuf;
 104         mode_t mode;
 105         uid_t uid;
 106         gid_t gid;
 107         char *arg, *last;
 108         const char *gid_str;
 109         const char *uid_str;
 110         const char *mode_str;
 111         int mkdir_flags = FILEUTILS_RECUR;
 112         int copy_flags = FILEUTILS_DEREFERENCE | FILEUTILS_FORCE;
 113         int opts;
 114         int ret = EXIT_SUCCESS;
 115         int isdir;
 116 #if ENABLE_SELINUX
 117         security_context_t scontext;
 118         bool use_default_selinux_context = 1;
 119 #endif
 120         enum {
 121                 OPT_c             = 1 << 0,
 122                 OPT_v             = 1 << 1,
 123                 OPT_b             = 1 << 2,
 124                 OPT_MKDIR_LEADING = 1 << 3,
 125                 OPT_DIRECTORY     = 1 << 4,
 126                 OPT_PRESERVE_TIME = 1 << 5,
 127                 OPT_STRIP         = 1 << 6,
 128                 OPT_GROUP         = 1 << 7,
 129                 OPT_MODE          = 1 << 8,
 130                 OPT_OWNER         = 1 << 9,
 131                 OPT_TARGET        = 1 << 10,
 132 #if ENABLE_SELINUX
 133                 OPT_SET_SECURITY_CONTEXT = 1 << 11,
 134                 OPT_PRESERVE_SECURITY_CONTEXT = 1 << 12,
 135 #endif
 136         };
 137
 138 #if ENABLE_FEATURE_INSTALL_LONG_OPTIONS
 139         applet_long_options = install_longopts;
 140 #endif
 141         opt_complementary = "t--d:d--t:s--d:d--s" IF_FEATURE_INSTALL_LONG_OPTIONS(IF_SELINUX(":Z--\xff:\xff--Z"));
 142         /* -c exists for backwards compatibility, it's needed */
 143         /* -b is ignored ("make a backup of each existing destination file") */
 144         opts = getopt32(argv, "cvb" "Ddpsg:m:o:t:" IF_SELINUX("Z:"),
 145                         &gid_str, &mode_str, &uid_str, &last
 146                         IF_SELINUX(, &scontext));
 147         argc -= optind;
 148         argv += optind;
 149
 150 #if ENABLE_SELINUX
 151         if (opts & (OPT_PRESERVE_SECURITY_CONTEXT|OPT_SET_SECURITY_CONTEXT)) {
 152                 selinux_or_die();
 153                 use_default_selinux_context = 0;
 154                 if (opts & OPT_PRESERVE_SECURITY_CONTEXT) {
 155                         copy_flags |= FILEUTILS_PRESERVE_SECURITY_CONTEXT;
 156                 }
 157                 if (opts & OPT_SET_SECURITY_CONTEXT) {
 158                         setfscreatecon_or_die(scontext);
 159                         copy_flags |= FILEUTILS_SET_SECURITY_CONTEXT;
 160                 }
 161         }
 162 #endif
 163
 164         if ((opts & OPT_v) && FILEUTILS_VERBOSE) {
 165                 mkdir_flags |= FILEUTILS_VERBOSE;
 166                 copy_flags |= FILEUTILS_VERBOSE;
 167         }
 168
 169         /* preserve access and modification time, this is GNU behaviour,
 170          * BSD only preserves modification time */
 171         if (opts & OPT_PRESERVE_TIME) {
 172                 copy_flags |= FILEUTILS_PRESERVE_STATUS;
 173         }
 174         mode = 0755; /* GNU coreutils 6.10 compat */
 175         if (opts & OPT_MODE)
 176                 mode = bb_parse_mode(mode_str, mode);
 177         uid = (opts & OPT_OWNER) ? get_ug_id(uid_str, xuname2uid) : getuid();
 178         gid = (opts & OPT_GROUP) ? get_ug_id(gid_str, xgroup2gid) : getgid();
 179
 180         /* If -t DIR is in use, then isdir=true, last="DIR" */
 181         isdir = (opts & OPT_TARGET);
 182         if (!(opts & (OPT_TARGET|OPT_DIRECTORY))) {
 183                 /* Neither -t DIR nor -d is in use */
 184                 argc--;
 185                 last = argv[argc];
 186                 argv[argc] = NULL;
 187                 /* coreutils install resolves link in this case, don't use lstat */
 188                 isdir = stat(last, &statbuf) < 0 ? 0 : S_ISDIR(statbuf.st_mode);
 189         }
 190
 191         if (argc < 1)
 192                 bb_show_usage();
 193
 194         while ((arg = *argv++) != NULL) {
 195                 char *dest;
 196
 197                 if (opts & OPT_DIRECTORY) {
 198                         dest = arg;
 199                         /* GNU coreutils 6.9 does not set uid:gid
 200                          * on intermediate created directories
 201                          * (only on last one) */
 202                         if (bb_make_directory(dest, 0755, mkdir_flags)) {
 203                                 ret = EXIT_FAILURE;
 204                                 goto next;
 205                         }
 206                 } else {
 207                         dest = last;
 208                         if (opts & OPT_MKDIR_LEADING) {
 209                                 char *ddir = xstrdup(dest);
 210                                 bb_make_directory(dirname(ddir), 0755, mkdir_flags);
 211                                 /* errors are not checked. copy_file
 212                                  * will fail if dir is not created.
 213                                  */
 214                                 free(ddir);
 215                         }
 216                         if (isdir)
 217                                 dest = concat_path_file(last, bb_basename(arg));
 218                         if (copy_file(arg, dest, copy_flags) != 0) {
 219                                 /* copy is not made */
 220                                 ret = EXIT_FAILURE;
 221                                 goto next;
 222                         }
 223                         if (opts & OPT_STRIP) {
 224                                 char *args[4];
 225                                 args[0] = (char*)"strip";
 226                                 args[1] = (char*)"-p"; /* -p --preserve-dates */
 227                                 args[2] = dest;
 228                                 args[3] = NULL;
 229                                 if (spawn_and_wait(args)) {
 230                                         bb_perror_msg("strip");
 231                                         ret = EXIT_FAILURE;
 232                                 }
 233                         }
 234                 }
 235
 236                 /* Set the file mode (always, not only with -m).
 237                  * GNU coreutils 6.10 is not affected by umask. */
 238                 if (chmod(dest, mode) == -1) {
 239                         bb_perror_msg("can't change %s of %s", "permissions", dest);
 240                         ret = EXIT_FAILURE;
 241                 }
 242 #if ENABLE_SELINUX
 243                 if (use_default_selinux_context)
 244                         setdefaultfilecon(dest);
 245 #endif
 246                 /* Set the user and group id */
 247                 if ((opts & (OPT_OWNER|OPT_GROUP))
 248                  && lchown(dest, uid, gid) == -1
 249                 ) {
 250                         bb_perror_msg("can't change %s of %s", "ownership", dest);
 251                         ret = EXIT_FAILURE;
 252                 }
 253  next:
 254                 if (ENABLE_FEATURE_CLEAN_UP && isdir)
 255                         free(dest);
 256         }
 257
 258         return ret;
 259 }