--- /dev/null
+/*
+ * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
+ * Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ *
+ * 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; only version 2 of the License.
+ *
+ * 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, write to the Free Software Foundation, Inc., 59 Temple
+ * Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#define _GNU_SOURCE
+#include <errno.h>
+#include <limits.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+#include <lttngerr.h>
+
+#include "utils.h"
+
+/*
+ * Write to writable pipe used to notify a thread.
+ */
+int notify_thread_pipe(int wpipe)
+{
+ int ret;
+
+ ret = write(wpipe, "!", 1);
+ if (ret < 0) {
+ PERROR("write poll pipe");
+ }
+
+ return ret;
+}
+
+/*
+ * Return pointer to home directory path using the env variable HOME.
+ *
+ * No home, NULL is returned.
+ */
+const char *get_home_dir(void)
+{
+ return ((const char *) getenv("HOME"));
+}
+
+/*
+ * Create recursively directory using the FULL path.
+ */
+int mkdir_recursive(const char *path, mode_t mode, uid_t uid, gid_t gid)
+{
+ int ret;
+ char *p, tmp[PATH_MAX];
+ size_t len;
+ mode_t old_umask;
+
+ ret = snprintf(tmp, sizeof(tmp), "%s", path);
+ if (ret < 0) {
+ PERROR("snprintf mkdir");
+ goto error;
+ }
+
+ len = ret;
+ if (tmp[len - 1] == '/') {
+ tmp[len - 1] = 0;
+ }
+
+ old_umask = umask(0);
+ for (p = tmp + 1; *p; p++) {
+ if (*p == '/') {
+ *p = 0;
+ ret = mkdir(tmp, mode);
+ if (ret < 0) {
+ if (!(errno == EEXIST)) {
+ PERROR("mkdir recursive");
+ ret = -errno;
+ goto umask_error;
+ }
+ } else if (ret == 0) {
+ /*
+ * We created the directory. Set its ownership to the
+ * user/group specified.
+ */
+ ret = chown(tmp, uid, gid);
+ if (ret < 0) {
+ PERROR("chown in mkdir recursive");
+ ret = -errno;
+ goto umask_error;
+ }
+ }
+ *p = '/';
+ }
+ }
+
+ ret = mkdir(tmp, mode);
+ if (ret < 0) {
+ if (!(errno == EEXIST)) {
+ PERROR("mkdir recursive last piece");
+ ret = -errno;
+ } else {
+ ret = 0;
+ }
+ } else if (ret == 0) {
+ /*
+ * We created the directory. Set its ownership to the user/group
+ * specified.
+ */
+ ret = chown(tmp, uid, gid);
+ if (ret < 0) {
+ PERROR("chown in mkdir recursive");
+ ret = -errno;
+ goto umask_error;
+ }
+ }
+
+umask_error:
+ umask(old_umask);
+error:
+ return ret;
+}