ctdb-common: Separate system utilties that are ctdb independent

Routines in system_common and system_<os> are supposed to be ctdb
functions with OS specific implementations.

Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Martin Schwenke <martin@meltin.net>

1 files changed, 71 insertions, 0 deletions

diff --git a/ctdb/common/system_util.c b/ctdb/common/system_util.c
new file mode 100644
index 0000000000..3aa9ebaaee
--- /dev/null
+++ b/ctdb/common/system_util.c
@@ -0,0 +1,71 @@
+/*
+   common system utilities
+
+   Copyright (C) Amitay Isaacs  2014
+   Copyright (C) Martin Schwenke  2014
+
+   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 <http://www.gnu.org/licenses/>.
+*/
+
+#include "includes.h"
+#include "system/filesys.h"
+
+#include <libgen.h>
+
+int mkdir_p(const char *dir, int mode)
+{
+	char t[PATH_MAX];
+	ssize_t len;
+	int ret;
+
+	if (strcmp(dir, "/") == 0) {
+		return 0;
+	}
+
+	if (strcmp(dir, ".") == 0) {
+		return 0;
+	}
+
+	/* Try to create directory */
+	ret = mkdir(dir, mode);
+	/* Succeed if that worked or if it already existed */
+	if (ret == 0 || errno == EEXIST) {
+		return 0;
+	}
+	/* Fail on anything else except ENOENT */
+	if (errno != ENOENT) {
+		return ret;
+	}
+
+	/* Create ancestors */
+	len = strlen(dir);
+	if (len >= PATH_MAX) {
+		errno = ENAMETOOLONG;
+		return -1;
+	}
+	strncpy(t, dir, len+1);
+
+	ret = mkdir_p(dirname(t), mode);
+	if (ret != 0) {
+		return ret;
+	}
+
+	/* Create directory */
+	ret = mkdir(dir, mode);
+	if ((ret == -1) && (errno == EEXIST)) {
+		ret = 0;
+	}
+
+	return ret;
+}