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-rw-r--r--common/mkdir_p.c187
1 files changed, 187 insertions, 0 deletions
diff --git a/common/mkdir_p.c b/common/mkdir_p.c
new file mode 100644
index 0000000..6fb98c3
--- /dev/null
+++ b/common/mkdir_p.c
@@ -0,0 +1,187 @@
+/* mkdir_p.c - Create a directory and any missing parents.
+ * Copyright (C) 2015 g10 Code GmbH
+ *
+ * This file is part of GnuPG.
+ *
+ * This file is free software; you can redistribute it and/or modify
+ * it under the terms of either
+ *
+ * - the GNU Lesser General Public License as published by the Free
+ * Software Foundation; either version 3 of the License, or (at
+ * your option) any later version.
+ *
+ * or
+ *
+ * - the GNU General Public License as published by the Free
+ * Software Foundation; either version 2 of the License, or (at
+ * your option) any later version.
+ *
+ * or both in parallel, as here.
+ *
+ * This file 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/>.
+ */
+
+#include <config.h>
+#include <sys/stat.h>
+#include <errno.h>
+#include <assert.h>
+#include <stdarg.h>
+
+#include "util.h"
+#include "stringhelp.h"
+#include "logging.h"
+#include "sysutils.h"
+#include "mkdir_p.h"
+
+
+gpg_error_t
+gnupg_amkdir_p (const char **directory_components)
+{
+ gpg_error_t err = 0;
+ int count;
+ char **dirs;
+ int i;
+
+ for (count = 0; directory_components[count]; count ++)
+ ;
+
+ /* log_debug ("%s: %d directory components.\n", __func__, count); */
+
+ dirs = xtrycalloc (count, sizeof *dirs);
+ if (!dirs)
+ return gpg_err_make (default_errsource, gpg_err_code_from_syserror ());
+
+ for (i = 0; directory_components[i]; i ++)
+ {
+ if (i == 0)
+ dirs[i] = make_filename_try (directory_components[i], NULL);
+ else
+ dirs[i] = make_filename_try (dirs[i-1], directory_components[i], NULL);
+ if (!dirs[i])
+ {
+ err = gpg_err_make (default_errsource, gpg_err_code_from_syserror ());
+ goto out;
+ }
+
+ /* log_debug ("%s: Directory %d: `%s'.\n", __func__, i, dirs[i]); */
+ }
+
+ for (i = count - 1; i >= 0; i --)
+ {
+ struct stat s;
+
+ /* log_debug ("%s: stat(%s)\n", __func__, dirs[i]); */
+
+ if (!gnupg_stat (dirs[i], &s))
+ {
+ if ( ! S_ISDIR (s.st_mode))
+ {
+ /* log_debug ("%s: %s exists, but is not a directory!\n", */
+ /* __func__, dirs[i]); */
+ err = gpg_err_make (default_errsource, GPG_ERR_ENOTDIR);
+ goto out;
+ }
+ else
+ {
+ /* Got a directory. */
+ /* log_debug ("%s: %s exists and is a directory!\n", */
+ /* __func__, dirs[i]); */
+ err = 0;
+ break;
+ }
+ }
+ else if (errno == ENOENT)
+ /* This directory does not exist yet. Continue walking up the
+ hierarchy. */
+ {
+ /* log_debug ("%s: %s does not exist!\n", */
+ /* __func__, dirs[i]); */
+ continue;
+ }
+ else
+ /* Some other error code. Die. Note: this could be ENOTDIR
+ (we return this above), which means that a component of the
+ path prefix is not a directory. */
+ {
+ /* log_debug ("%s: stat(%s) => %s!\n", */
+ /* __func__, dirs[i], strerror (errno)); */
+ err = gpg_err_make (default_errsource, gpg_err_code_from_syserror ());
+ goto out;
+ }
+ }
+
+ assert (i >= -1);
+ /* DIRS[I] exists. Start with the following entry. */
+ i ++;
+
+ for (; i < count; i ++)
+ {
+ /* log_debug ("Creating directory: %s\n", dirs[i]); */
+
+ if (gnupg_mkdir (dirs[i], "-rwx"))
+ {
+ err = gpg_err_make (default_errsource, gpg_err_code_from_syserror ());
+ goto out;
+ }
+ }
+
+ out:
+ for (i = 0; i < count; i ++)
+ xfree (dirs[i]);
+ xfree (dirs);
+
+ /* log_debug ("%s: Returning %s\n", __func__, gpg_strerror (rc)); */
+
+ return err;
+}
+
+
+gpg_error_t
+gnupg_mkdir_p (const char *directory_component, ...)
+{
+ va_list ap;
+ gpg_error_t err = 0;
+ int i;
+ int space = 1;
+ const char **dirs;
+
+ dirs = xtrymalloc (space * sizeof (char *));
+ if (!dirs)
+ return gpg_err_make (default_errsource, gpg_err_code_from_syserror ());
+
+ dirs[0] = directory_component;
+
+ va_start (ap, directory_component);
+ for (i = 1; dirs[i - 1]; i ++)
+ {
+ if (i == space)
+ {
+ const char **tmp_dirs;
+
+ space = 2 * space;
+ tmp_dirs = xtryrealloc (dirs, space * sizeof (char *));
+ if (!tmp_dirs)
+ {
+ err = gpg_err_make (default_errsource,
+ gpg_err_code_from_syserror ());
+ break;
+ }
+ dirs = tmp_dirs;
+ }
+ dirs[i] = va_arg (ap, char *);
+ }
+ va_end (ap);
+
+ if (!err)
+ err = gnupg_amkdir_p (dirs);
+
+ xfree (dirs);
+
+ return err;
+}