X-Git-Url: https://git.lttng.org/?a=blobdiff_plain;f=src%2Fbin%2Flttng-sessiond%2Futils.c;h=d0c8dd16f62571618db8118759d7a8ee4e650a76;hb=a24f7994321e1b114bf900b530604560786a9131;hp=313f4cf782511e8b0fbab6cb9ecf64bcb22ef7b9;hpb=10a8a2237343699e3923d87e24dbf2d7fe225377;p=lttng-tools.git

diff --git a/src/bin/lttng-sessiond/utils.c b/src/bin/lttng-sessiond/utils.c
index 313f4cf78..d0c8dd16f 100644
--- a/src/bin/lttng-sessiond/utils.c
+++ b/src/bin/lttng-sessiond/utils.c
@@ -2,29 +2,30 @@
  * 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 free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License, version 2 only,
+ * as published by the Free Software Foundation.
  *
- * 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.
+ * 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.
+ * 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.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
 
 #define _GNU_SOURCE
 #include <errno.h>
+#include <fcntl.h>
 #include <limits.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
 
-#include <common/lttngerr.h>
+#include <common/error.h>
 
 #include "utils.h"
 
@@ -52,3 +53,77 @@ const char *get_home_dir(void)
 {
 	return ((const char *) getenv("HOME"));
 }
+
+/*
+ * Create a pipe in dst.
+ */
+int utils_create_pipe(int *dst)
+{
+	int ret;
+
+	if (dst == NULL) {
+		return -1;
+	}
+
+	ret = pipe(dst);
+	if (ret < 0) {
+		PERROR("create pipe");
+	}
+
+	return ret;
+}
+
+/*
+ * Create pipe and set CLOEXEC flag to both fd.
+ *
+ * Make sure the pipe opened by this function are closed at some point. Use
+ * utils_close_pipe().
+ */
+int utils_create_pipe_cloexec(int *dst)
+{
+	int ret, i;
+
+	if (dst == NULL) {
+		return -1;
+	}
+
+	ret = utils_create_pipe(dst);
+	if (ret < 0) {
+		goto error;
+	}
+
+	for (i = 0; i < 2; i++) {
+		ret = fcntl(dst[i], F_SETFD, FD_CLOEXEC);
+		if (ret < 0) {
+			PERROR("fcntl pipe cloexec");
+			goto error;
+		}
+	}
+
+error:
+	return ret;
+}
+
+/*
+ * Close both read and write side of the pipe.
+ */
+void utils_close_pipe(int *src)
+{
+	int i, ret;
+
+	if (src == NULL) {
+		return;
+	}
+
+	for (i = 0; i < 2; i++) {
+		/* Safety check */
+		if (src[i] < 0) {
+			continue;
+		}
+
+		ret = close(src[i]);
+		if (ret) {
+			PERROR("close pipe");
+		}
+	}
+}