X-Git-Url: http://git.ozlabs.org/?p=ccan;a=blobdiff_plain;f=ccan%2Fdaemonize%2Fdaemonize.c;h=3c0a53a8bfa11a25a6e0685dc4c7f7ed72a4ab10;hp=ca4aafc8fa99c403b8396dd0d871d3840e536e46;hb=cc2d609dfca7192305ad477b8c2b52cfdc1aa9be;hpb=cd13fd53487ba6f10b78ab1ffd625cb3da7ab22a

diff --git a/ccan/daemonize/daemonize.c b/ccan/daemonize/daemonize.c
index ca4aafc8..3c0a53a8 100644
--- a/ccan/daemonize/daemonize.c
+++ b/ccan/daemonize/daemonize.c
@@ -1,8 +1,10 @@
+/* Licensed under BSD-MIT - see LICENSE file for details */
 #include <ccan/daemonize/daemonize.h>
 #include <unistd.h>
 #include <stdlib.h>
 #include <sys/types.h>
 #include <sys/stat.h>
+#include <fcntl.h>
 
 /* This code is based on Stevens Advanced Programming in the UNIX
  * Environment. */
@@ -21,6 +23,14 @@ bool daemonize(void)
 	close(STDOUT_FILENO);
 	close(STDERR_FILENO);
 
+	/* Many routines write to stderr; that can cause chaos if used
+	 * for something else, so set it here. */
+	if (open("/dev/null", O_WRONLY) != 0)
+		return false;
+	if (dup2(0, STDERR_FILENO) != STDERR_FILENO)
+		return false;
+	close(0);
+
 	/* Session leader so ^C doesn't whack us. */
 	setsid();
 	/* Move off any mount points we might be in. */