From: Christian Brauner <christian.brauner@ubuntu.com>
Date: Wed, 29 Nov 2017 02:46:12 +0000 (+0100)
Subject: utils: backport set_stdfds()
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6bdbc920ec709d112e8ab84ba6dbdd5bb39d2b70;p=thirdparty%2Flxc.git

utils: backport set_stdfds()

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
---

diff --git a/src/lxc/utils.c b/src/lxc/utils.c
index f8239874d..dbe2e810b 100644
--- a/src/lxc/utils.c
+++ b/src/lxc/utils.c
@@ -1365,3 +1365,25 @@ int safe_mount(const char *src, const char *dest, const char *fstype,
 
 	return 0;
 }
+
+int set_stdfds(int fd)
+{
+	int ret;
+
+	if (fd < 0)
+		return -1;
+
+	ret = dup2(fd, STDIN_FILENO);
+	if (ret < 0)
+		return -1;
+
+	ret = dup2(fd, STDOUT_FILENO);
+	if (ret < 0)
+		return -1;
+
+	ret = dup2(fd, STDERR_FILENO);
+	if (ret < 0)
+		return -1;
+
+	return 0;
+}
diff --git a/src/lxc/utils.h b/src/lxc/utils.h
index bf62bd060..89225da1e 100644
--- a/src/lxc/utils.h
+++ b/src/lxc/utils.h
@@ -294,4 +294,5 @@ int null_stdfds(void);
 
 int safe_mount(const char *src, const char *dest, const char *fstype,
 		unsigned long flags, const void *data, const char *rootfs);
+int set_stdfds(int fd);
 #endif /* __LXC_UTILS_H */