X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=udev.c;h=926c4b526ab5a82dd0107af833f5cfaf8569e98b;hp=beaa191c045098ce4c2424735407d63e7ddce1fc;hb=79bd4f222954a331aafcd7d0164742a60b570294;hpb=40caaeec51f5d8f65245932a85396ac85265cbe5

diff --git a/udev.c b/udev.c
index beaa191c0..926c4b526 100644
--- a/udev.c
+++ b/udev.c
@@ -72,6 +72,7 @@ int main(int argc, char *argv[], char *envp[])
 	const char *devpath;
 	const char *subsystem;
 	struct sigaction act;
+	int devnull;
 	int retval = -EINVAL;
 
 	if (argc == 2 && strcmp(argv[1], "-V") == 0) {
@@ -79,7 +80,22 @@ int main(int argc, char *argv[], char *envp[])
 		exit(0);
 	}
 
+	/* set std fd's to /dev/null, if the kernel forks us, we don't have them at all */
+	devnull = open("/dev/null", O_RDWR);
+	if (devnull >= 0)  {
+		if (devnull != STDIN_FILENO)
+			dup2(devnull, STDIN_FILENO);
+		if (devnull != STDOUT_FILENO)
+			dup2(devnull, STDOUT_FILENO);
+		if (devnull != STDERR_FILENO)
+			dup2(devnull, STDERR_FILENO);
+		if (devnull > STDERR_FILENO)
+			close(devnull);
+	}
+
 	logging_init("udev");
+	if (devnull < 0)
+		err("fatal, could not open /dev/null");
 	udev_init_config();
 	dbg("version %s", UDEV_VERSION);