X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=udev.c;h=17867180c7d793824de88b91365b4c6b653414b5;hb=a8d141a3c165dafcf21d081e88f3cc0b7f1e65c5;hp=beaa191c045098ce4c2424735407d63e7ddce1fc;hpb=40caaeec51f5d8f65245932a85396ac85265cbe5;p=elogind.git

diff --git a/udev.c b/udev.c
index beaa191c0..17867180c 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: %s", strerror(errno));
 	udev_init_config();
 	dbg("version %s", UDEV_VERSION);
 
@@ -116,7 +132,7 @@ int main(int argc, char *argv[], char *envp[])
 	}
 
 	udev_init_device(&udev, devpath, subsystem, action);
-	udev_rules_init(&rules, 1, 0);
+	udev_rules_init(&rules, 0);
 
 	retval = udev_process_event(&rules, &udev);