Adding upstream version 9.1.upstream/9.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 332 insertions, 0 deletions

diff --git a/src/chown.c b/src/chown.c
new file mode 100644
index 0000000..07cc907
--- /dev/null
+++ b/src/chown.c
@@ -0,0 +1,332 @@
+/* chown -- change user and group ownership of files
+   Copyright (C) 1989-2022 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by David MacKenzie <djm@gnu.ai.mit.edu>. */
+
+#include <config.h>
+#include <stdio.h>
+#include <sys/types.h>
+#include <getopt.h>
+
+#include "system.h"
+#include "chown-core.h"
+#include "die.h"
+#include "error.h"
+#include "fts_.h"
+#include "quote.h"
+#include "root-dev-ino.h"
+#include "userspec.h"
+
+/* The official name of this program (e.g., no 'g' prefix).  */
+#define PROGRAM_NAME "chown"
+
+#define AUTHORS \
+  proper_name ("David MacKenzie"), \
+  proper_name ("Jim Meyering")
+
+/* The argument to the --reference option.  Use the owner and group IDs
+   of this file.  This file must exist.  */
+static char *reference_file;
+
+/* For long options that have no equivalent short option, use a
+   non-character as a pseudo short option, starting with CHAR_MAX + 1.  */
+enum
+{
+  DEREFERENCE_OPTION = CHAR_MAX + 1,
+  FROM_OPTION,
+  NO_PRESERVE_ROOT,
+  PRESERVE_ROOT,
+  REFERENCE_FILE_OPTION
+};
+
+static struct option const long_options[] =
+{
+  {"recursive", no_argument, NULL, 'R'},
+  {"changes", no_argument, NULL, 'c'},
+  {"dereference", no_argument, NULL, DEREFERENCE_OPTION},
+  {"from", required_argument, NULL, FROM_OPTION},
+  {"no-dereference", no_argument, NULL, 'h'},
+  {"no-preserve-root", no_argument, NULL, NO_PRESERVE_ROOT},
+  {"preserve-root", no_argument, NULL, PRESERVE_ROOT},
+  {"quiet", no_argument, NULL, 'f'},
+  {"silent", no_argument, NULL, 'f'},
+  {"reference", required_argument, NULL, REFERENCE_FILE_OPTION},
+  {"verbose", no_argument, NULL, 'v'},
+  {GETOPT_HELP_OPTION_DECL},
+  {GETOPT_VERSION_OPTION_DECL},
+  {NULL, 0, NULL, 0}
+};
+
+void
+usage (int status)
+{
+  if (status != EXIT_SUCCESS)
+    emit_try_help ();
+  else
+    {
+      printf (_("\
+Usage: %s [OPTION]... [OWNER][:[GROUP]] FILE...\n\
+  or:  %s [OPTION]... --reference=RFILE FILE...\n\
+"),
+              program_name, program_name);
+      fputs (_("\
+Change the owner and/or group of each FILE to OWNER and/or GROUP.\n\
+With --reference, change the owner and group of each FILE to those of RFILE.\n\
+\n\
+"), stdout);
+      fputs (_("\
+  -c, --changes          like verbose but report only when a change is made\n\
+  -f, --silent, --quiet  suppress most error messages\n\
+  -v, --verbose          output a diagnostic for every file processed\n\
+"), stdout);
+      fputs (_("\
+      --dereference      affect the referent of each symbolic link (this is\n\
+                         the default), rather than the symbolic link itself\n\
+  -h, --no-dereference   affect symbolic links instead of any referenced file\n\
+"), stdout);
+      fputs (_("\
+                         (useful only on systems that can change the\n\
+                         ownership of a symlink)\n\
+"), stdout);
+      fputs (_("\
+      --from=CURRENT_OWNER:CURRENT_GROUP\n\
+                         change the owner and/or group of each file only if\n\
+                         its current owner and/or group match those specified\n\
+                         here.  Either may be omitted, in which case a match\n\
+                         is not required for the omitted attribute\n\
+"), stdout);
+      fputs (_("\
+      --no-preserve-root  do not treat '/' specially (the default)\n\
+      --preserve-root    fail to operate recursively on '/'\n\
+"), stdout);
+      fputs (_("\
+      --reference=RFILE  use RFILE's owner and group rather than\n\
+                         specifying OWNER:GROUP values\n\
+"), stdout);
+      fputs (_("\
+  -R, --recursive        operate on files and directories recursively\n\
+"), stdout);
+      fputs (_("\
+\n\
+The following options modify how a hierarchy is traversed when the -R\n\
+option is also specified.  If more than one is specified, only the final\n\
+one takes effect.\n\
+\n\
+  -H                     if a command line argument is a symbolic link\n\
+                         to a directory, traverse it\n\
+  -L                     traverse every symbolic link to a directory\n\
+                         encountered\n\
+  -P                     do not traverse any symbolic links (default)\n\
+\n\
+"), stdout);
+      fputs (HELP_OPTION_DESCRIPTION, stdout);
+      fputs (VERSION_OPTION_DESCRIPTION, stdout);
+      fputs (_("\
+\n\
+Owner is unchanged if missing.  Group is unchanged if missing, but changed\n\
+to login group if implied by a ':' following a symbolic OWNER.\n\
+OWNER and GROUP may be numeric as well as symbolic.\n\
+"), stdout);
+      printf (_("\
+\n\
+Examples:\n\
+  %s root /u        Change the owner of /u to \"root\".\n\
+  %s root:staff /u  Likewise, but also change its group to \"staff\".\n\
+  %s -hR root /u    Change the owner of /u and subfiles to \"root\".\n\
+"),
+              program_name, program_name, program_name);
+      emit_ancillary_info (PROGRAM_NAME);
+    }
+  exit (status);
+}
+
+int
+main (int argc, char **argv)
+{
+  bool preserve_root = false;
+
+  uid_t uid = -1;	/* Specified uid; -1 if not to be changed. */
+  gid_t gid = -1;	/* Specified gid; -1 if not to be changed. */
+
+  /* Change the owner (group) of a file only if it has this uid (gid).
+     -1 means there's no restriction.  */
+  uid_t required_uid = -1;
+  gid_t required_gid = -1;
+
+  /* Bit flags that control how fts works.  */
+  int bit_flags = FTS_PHYSICAL;
+
+  /* 1 if --dereference, 0 if --no-dereference, -1 if neither has been
+     specified.  */
+  int dereference = -1;
+
+  struct Chown_option chopt;
+  bool ok;
+  int optc;
+
+  initialize_main (&argc, &argv);
+  set_program_name (argv[0]);
+  setlocale (LC_ALL, "");
+  bindtextdomain (PACKAGE, LOCALEDIR);
+  textdomain (PACKAGE);
+
+  atexit (close_stdout);
+
+  chopt_init (&chopt);
+
+  while ((optc = getopt_long (argc, argv, "HLPRcfhv", long_options, NULL))
+         != -1)
+    {
+      switch (optc)
+        {
+        case 'H': /* Traverse command-line symlinks-to-directories.  */
+          bit_flags = FTS_COMFOLLOW | FTS_PHYSICAL;
+          break;
+
+        case 'L': /* Traverse all symlinks-to-directories.  */
+          bit_flags = FTS_LOGICAL;
+          break;
+
+        case 'P': /* Traverse no symlinks-to-directories.  */
+          bit_flags = FTS_PHYSICAL;
+          break;
+
+        case 'h': /* --no-dereference: affect symlinks */
+          dereference = 0;
+          break;
+
+        case DEREFERENCE_OPTION: /* --dereference: affect the referent
+                                    of each symlink */
+          dereference = 1;
+          break;
+
+        case NO_PRESERVE_ROOT:
+          preserve_root = false;
+          break;
+
+        case PRESERVE_ROOT:
+          preserve_root = true;
+          break;
+
+        case REFERENCE_FILE_OPTION:
+          reference_file = optarg;
+          break;
+
+        case FROM_OPTION:
+          {
+            bool warn;
+            char const *e = parse_user_spec_warn (optarg,
+                                                  &required_uid, &required_gid,
+                                                  NULL, NULL, &warn);
+            if (e)
+              error (warn ? 0 : EXIT_FAILURE, 0, "%s: %s", e, quote (optarg));
+            break;
+          }
+
+        case 'R':
+          chopt.recurse = true;
+          break;
+
+        case 'c':
+          chopt.verbosity = V_changes_only;
+          break;
+
+        case 'f':
+          chopt.force_silent = true;
+          break;
+
+        case 'v':
+          chopt.verbosity = V_high;
+          break;
+
+        case_GETOPT_HELP_CHAR;
+        case_GETOPT_VERSION_CHAR (PROGRAM_NAME, AUTHORS);
+        default:
+          usage (EXIT_FAILURE);
+        }
+    }
+
+  if (chopt.recurse)
+    {
+      if (bit_flags == FTS_PHYSICAL)
+        {
+          if (dereference == 1)
+            die (EXIT_FAILURE, 0,
+                 _("-R --dereference requires either -H or -L"));
+          dereference = 0;
+        }
+    }
+  else
+    {
+      bit_flags = FTS_PHYSICAL;
+    }
+  chopt.affect_symlink_referent = (dereference != 0);
+
+  if (argc - optind < (reference_file ? 1 : 2))
+    {
+      if (argc <= optind)
+        error (0, 0, _("missing operand"));
+      else
+        error (0, 0, _("missing operand after %s"), quote (argv[argc - 1]));
+      usage (EXIT_FAILURE);
+    }
+
+  if (reference_file)
+    {
+      struct stat ref_stats;
+      if (stat (reference_file, &ref_stats))
+        die (EXIT_FAILURE, errno, _("failed to get attributes of %s"),
+             quoteaf (reference_file));
+
+      uid = ref_stats.st_uid;
+      gid = ref_stats.st_gid;
+      chopt.user_name = uid_to_name (ref_stats.st_uid);
+      chopt.group_name = gid_to_name (ref_stats.st_gid);
+    }
+  else
+    {
+      bool warn;
+      char const *e = parse_user_spec_warn (argv[optind], &uid, &gid,
+                                            &chopt.user_name,
+                                            &chopt.group_name, &warn);
+      if (e)
+        error (warn ? 0 : EXIT_FAILURE, 0, "%s: %s", e, quote (argv[optind]));
+
+      /* If a group is specified but no user, set the user name to the
+         empty string so that diagnostics say "ownership :GROUP"
+         rather than "group GROUP".  */
+      if (!chopt.user_name && chopt.group_name)
+        chopt.user_name = xstrdup ("");
+
+      optind++;
+    }
+
+  if (chopt.recurse && preserve_root)
+    {
+      static struct dev_ino dev_ino_buf;
+      chopt.root_dev_ino = get_root_dev_ino (&dev_ino_buf);
+      if (chopt.root_dev_ino == NULL)
+        die (EXIT_FAILURE, errno, _("failed to get attributes of %s"),
+             quoteaf ("/"));
+    }
+
+  bit_flags |= FTS_DEFER_STAT;
+  ok = chown_files (argv + optind, bit_flags,
+                    uid, gid,
+                    required_uid, required_gid, &chopt);
+
+  main_exit (ok ? EXIT_SUCCESS : EXIT_FAILURE);
+}