1 files changed, 94 insertions, 0 deletions
diff --git a/lib/tempfile.c b/lib/tempfile.c
new file mode 100644
index 0000000..5d8847c
--- /dev/null
+++ b/lib/tempfile.c
@@ -0,0 +1,94 @@
+/* tempfile.c: handle temporary directory creation (formerly also temporary
+ * files but this is no longer used).
+ *
+ * Copyright (C) 2001, 2003, 2007, 2009, 2011 Colin Watson.
+ *
+ * This file is part of man-db.
+ *
+ * man-db 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 2 of the License, or
+ * (at your option) any later version.
+ *
+ * man-db 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 man-db; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#ifdef HAVE_CONFIG_H
+#  include "config.h"
+#endif /* HAVE_CONFIG_H */
+
+#include <assert.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include "attribute.h"
+#include "xvasprintf.h"
+
+#include "manconfig.h"
+
+#include "tempfile.h"
+
+static bool ATTRIBUTE_PURE running_setid (void)
+{
+#ifdef HAVE_GETUID
+	return getuid () != geteuid () || getgid () != getegid ();
+#else /* !HAVE_GETUID */
+	return false;
+#endif /* HAVE_GETUID */
+}
+
+static const char *path_search (void)
+{
+	const char *dir = NULL;
+
+	if (running_setid ()) {
+		dir = getenv ("TMPDIR");
+		if (!dir || !CAN_ACCESS (dir, W_OK))
+			dir = NULL;
+		if (!dir) {
+			dir = getenv ("TMP");
+			if (!dir || !CAN_ACCESS (dir, W_OK))
+				dir = NULL;
+		}
+	}
+#ifdef P_tmpdir
+	if (!dir) {
+		dir = P_tmpdir;
+		if (!dir || !CAN_ACCESS (dir, W_OK))
+			dir = NULL;
+	}
+#endif
+	if (!dir) {
+		dir = "/tmp";
+		if (!CAN_ACCESS (dir, W_OK))
+			dir = NULL;
+	}
+
+	return dir;
+}
+
+/* Get a sane temporary directory, looking in $TMPDIR, P_tmpdir, and finally
+ * /tmp.
+ */
+char *create_tempdir (const char *template)
+{
+	const char *dir = path_search ();
+	char *created_dirname;
+
+	if (!dir)
+		return NULL;
+	created_dirname = xasprintf ("%s/%sXXXXXX", dir, template);
+	assert (created_dirname);
+	if (!mkdtemp (created_dirname))
+		return NULL;
+	return created_dirname;
+}