Adding upstream version 9.1.upstream/9.1upstream

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

1 files changed, 310 insertions, 0 deletions

diff --git a/src/mkdir.c b/src/mkdir.c
new file mode 100644
index 0000000..8ab3bec
--- /dev/null
+++ b/src/mkdir.c
@@ -0,0 +1,310 @@
+/* mkdir -- make directories
+   Copyright (C) 1990-2022 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/>.  */
+
+/* David MacKenzie <djm@ai.mit.edu>  */
+
+#include <config.h>
+#include <stdio.h>
+#include <getopt.h>
+#include <sys/types.h>
+#include <selinux/label.h>
+
+#include "system.h"
+#include "die.h"
+#include "error.h"
+#include "mkdir-p.h"
+#include "modechange.h"
+#include "prog-fprintf.h"
+#include "quote.h"
+#include "savewd.h"
+#include "selinux.h"
+#include "smack.h"
+
+/* The official name of this program (e.g., no 'g' prefix).  */
+#define PROGRAM_NAME "mkdir"
+
+#define AUTHORS proper_name ("David MacKenzie")
+
+static struct option const longopts[] =
+{
+  {GETOPT_SELINUX_CONTEXT_OPTION_DECL},
+  {"mode", required_argument, NULL, 'm'},
+  {"parents", no_argument, NULL, 'p'},
+  {"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]... DIRECTORY...\n"), program_name);
+      fputs (_("\
+Create the DIRECTORY(ies), if they do not already exist.\n\
+"), stdout);
+
+      emit_mandatory_arg_note ();
+
+      fputs (_("\
+  -m, --mode=MODE   set file mode (as in chmod), not a=rwx - umask\n\
+  -p, --parents     no error if existing, make parent directories as needed,\n\
+                    with their file modes unaffected by any -m option.\n\
+  -v, --verbose     print a message for each created directory\n\
+"), stdout);
+      fputs (_("\
+  -Z                   set SELinux security context of each created directory\n\
+                         to the default type\n\
+      --context[=CTX]  like -Z, or if CTX is specified then set the SELinux\n\
+                         or SMACK security context to CTX\n\
+"), stdout);
+      fputs (HELP_OPTION_DESCRIPTION, stdout);
+      fputs (VERSION_OPTION_DESCRIPTION, stdout);
+      emit_ancillary_info (PROGRAM_NAME);
+    }
+  exit (status);
+}
+
+/* Options passed to subsidiary functions.  */
+struct mkdir_options
+{
+  /* Function to make an ancestor, or NULL if ancestors should not be
+     made.  */
+  int (*make_ancestor_function) (char const *, char const *, void *);
+
+  /* Umask value for when making an ancestor.  */
+  mode_t umask_ancestor;
+
+  /* Umask value for when making the directory itself.  */
+  mode_t umask_self;
+
+  /* Mode for directory itself.  */
+  mode_t mode;
+
+  /* File mode bits affected by MODE.  */
+  mode_t mode_bits;
+
+  /* Set the SELinux File Context.  */
+  struct selabel_handle *set_security_context;
+
+  /* If not null, format to use when reporting newly made directories.  */
+  char const *created_directory_format;
+};
+
+/* Report that directory DIR was made, if OPTIONS requests this.  */
+static void
+announce_mkdir (char const *dir, void *options)
+{
+  struct mkdir_options const *o = options;
+  if (o->created_directory_format)
+    prog_fprintf (stdout, o->created_directory_format, quoteaf (dir));
+}
+
+/* Make ancestor directory DIR, whose last component is COMPONENT,
+   with options OPTIONS.  Assume the working directory is COMPONENT's
+   parent.  Return 0 if successful and the resulting directory is
+   readable, 1 if successful but the resulting directory is not
+   readable, -1 (setting errno) otherwise.  */
+static int
+make_ancestor (char const *dir, char const *component, void *options)
+{
+  struct mkdir_options const *o = options;
+
+  if (o->set_security_context
+      && defaultcon (o->set_security_context, component, S_IFDIR) < 0
+      && ! ignorable_ctx_err (errno))
+    error (0, errno, _("failed to set default creation context for %s"),
+           quoteaf (dir));
+
+  if (o->umask_ancestor != o->umask_self)
+    umask (o->umask_ancestor);
+  int r = mkdir (component, S_IRWXUGO);
+  if (o->umask_ancestor != o->umask_self)
+    {
+      int mkdir_errno = errno;
+      umask (o->umask_self);
+      errno = mkdir_errno;
+    }
+  if (r == 0)
+    {
+      r = (o->umask_ancestor & S_IRUSR) != 0;
+      announce_mkdir (dir, options);
+    }
+  return r;
+}
+
+/* Process a command-line file name.  */
+static int
+process_dir (char *dir, struct savewd *wd, void *options)
+{
+  struct mkdir_options const *o = options;
+
+  /* If possible set context before DIR created.  */
+  if (o->set_security_context)
+    {
+      if (! o->make_ancestor_function
+          && defaultcon (o->set_security_context, dir, S_IFDIR) < 0
+          && ! ignorable_ctx_err (errno))
+        error (0, errno, _("failed to set default creation context for %s"),
+               quoteaf (dir));
+    }
+
+  int ret = (make_dir_parents (dir, wd, o->make_ancestor_function, options,
+                               o->mode, announce_mkdir,
+                               o->mode_bits, (uid_t) -1, (gid_t) -1, true)
+             ? EXIT_SUCCESS
+             : EXIT_FAILURE);
+
+  /* FIXME: Due to the current structure of make_dir_parents()
+     we don't have the facility to call defaultcon() before the
+     final component of DIR is created.  So for now, create the
+     final component with the context from previous component
+     and here we set the context for the final component. */
+  if (ret == EXIT_SUCCESS && o->set_security_context
+      && o->make_ancestor_function)
+    {
+      if (! restorecon (o->set_security_context, last_component (dir), false)
+          && ! ignorable_ctx_err (errno))
+        error (0, errno, _("failed to restore context for %s"),
+               quoteaf (dir));
+    }
+
+  return ret;
+}
+
+int
+main (int argc, char **argv)
+{
+  char const *specified_mode = NULL;
+  int optc;
+  char const *scontext = NULL;
+  struct mkdir_options options;
+
+  options.make_ancestor_function = NULL;
+  options.mode = S_IRWXUGO;
+  options.mode_bits = 0;
+  options.created_directory_format = NULL;
+  options.set_security_context = NULL;
+
+  initialize_main (&argc, &argv);
+  set_program_name (argv[0]);
+  setlocale (LC_ALL, "");
+  bindtextdomain (PACKAGE, LOCALEDIR);
+  textdomain (PACKAGE);
+
+  atexit (close_stdout);
+
+  while ((optc = getopt_long (argc, argv, "pm:vZ", longopts, NULL)) != -1)
+    {
+      switch (optc)
+        {
+        case 'p':
+          options.make_ancestor_function = make_ancestor;
+          break;
+        case 'm':
+          specified_mode = optarg;
+          break;
+        case 'v': /* --verbose  */
+          options.created_directory_format = _("created directory %s");
+          break;
+        case 'Z':
+          if (is_smack_enabled ())
+            {
+              /* We don't yet support -Z to restore context with SMACK.  */
+              scontext = optarg;
+            }
+          else if (is_selinux_enabled () > 0)
+            {
+              if (optarg)
+                scontext = optarg;
+              else
+                {
+                  options.set_security_context = selabel_open (SELABEL_CTX_FILE,
+                                                               NULL, 0);
+                  if (! options.set_security_context)
+                    error (0, errno, _("warning: ignoring --context"));
+                }
+            }
+          else if (optarg)
+            {
+              error (0, 0,
+                     _("warning: ignoring --context; "
+                       "it requires an SELinux/SMACK-enabled kernel"));
+            }
+          break;
+        case_GETOPT_HELP_CHAR;
+        case_GETOPT_VERSION_CHAR (PROGRAM_NAME, AUTHORS);
+        default:
+          usage (EXIT_FAILURE);
+        }
+    }
+
+  if (optind == argc)
+    {
+      error (0, 0, _("missing operand"));
+      usage (EXIT_FAILURE);
+    }
+
+  /* FIXME: This assumes mkdir() is done in the same process.
+     If that's not always the case we would need to call this
+     like we do when options.set_security_context.  */
+  if (scontext)
+    {
+      int ret = 0;
+      if (is_smack_enabled ())
+        ret = smack_set_label_for_self (scontext);
+      else
+        ret = setfscreatecon (scontext);
+
+      if (ret < 0)
+        die (EXIT_FAILURE, errno,
+             _("failed to set default file creation context to %s"),
+             quote (scontext));
+    }
+
+
+  if (options.make_ancestor_function || specified_mode)
+    {
+      mode_t umask_value = umask (0);
+      options.umask_ancestor = umask_value & ~(S_IWUSR | S_IXUSR);
+
+      if (specified_mode)
+        {
+          struct mode_change *change = mode_compile (specified_mode);
+          if (!change)
+            die (EXIT_FAILURE, 0, _("invalid mode %s"),
+                 quote (specified_mode));
+          options.mode = mode_adjust (S_IRWXUGO, true, umask_value, change,
+                                      &options.mode_bits);
+          options.umask_self = umask_value & ~options.mode;
+          free (change);
+        }
+      else
+        {
+          options.mode = S_IRWXUGO;
+          options.umask_self = umask_value;
+        }
+
+      umask (options.umask_self);
+    }
+
+  return savewd_process_files (argc - optind, argv + optind,
+                               process_dir, &options);
+}