listen: moved redirect_stdin() to daemon.c

redirect_stdin() is a daemonization function, and disconnecting from
the standard input is always a good idea for MPD.

src/daemon.c

@@ -24,6 +24,32 @@
 #include <unistd.h>
 #include <errno.h>
 #include <string.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+
+void
+daemonize_close_stdin(void)
+{
+	int fd, st;
+	struct stat ss;
+
+	if ((st = fstat(STDIN_FILENO, &ss)) < 0) {
+		if ((fd = open("/dev/null", O_RDONLY) > 0)) {
+			g_debug("stdin closed, and could not open /dev/null "
+				"as fd=0, some external library bugs "
+				"may be exposed...");
+			close(fd);
+		}
+		return;
+	}
+	if (!isatty(STDIN_FILENO))
+		return;
+	if ((fd = open("/dev/null", O_RDONLY)) < 0)
+		g_error("failed to open /dev/null %s", strerror(errno));
+	if (dup2(fd, STDIN_FILENO) < 0)
+		g_error("dup2 stdin: %s", strerror(errno));
+}
 
 void
 daemonize(Options *options)

src/daemon.h

@@ -21,6 +21,12 @@
 
 #include "cmdline.h"
 
+/**
+ * Close stdin (fd 0) and re-open it as /dev/null.
+ */
+void
+daemonize_close_stdin(void);
+
 void
 daemonize(Options *options);
 

src/listen.c

@@ -49,34 +49,6 @@ static int *listenSockets;
 static int numberOfListenSockets;
 int boundPort;
 
-/*
- * redirect stdin to /dev/null to work around a libao bug
- * there are likely other bugs in other libraries (and even our code!)
- * that check for fd > 0, so it's easiest to just keep
- * fd = 0 == /dev/null for now...
- */
-static void redirect_stdin(void)
-{
-	int fd, st;
-	struct stat ss;
-
-	if ((st = fstat(STDIN_FILENO, &ss)) < 0) {
-		if ((fd = open("/dev/null", O_RDONLY) > 0)) {
-			g_debug("stdin closed, and could not open /dev/null "
-				"as fd=0, some external library bugs "
-				"may be exposed...");
-			close(fd);
-		}
-		return;
-	}
-	if (!isatty(STDIN_FILENO))
-		return;
-	if ((fd = open("/dev/null", O_RDONLY)) < 0)
-		g_error("failed to open /dev/null %s", strerror(errno));
-	if (dup2(fd, STDIN_FILENO) < 0)
-		g_error("dup2 stdin: %s", strerror(errno));
-}
-
 static int establishListen(int pf, const struct sockaddr *addrp,
 			   socklen_t addrlen)
 {
@@ -245,7 +217,6 @@ void listenOnPort(void)
 
 	boundPort = port;
 
-	redirect_stdin();
 	do {
 		parseListenConfigParam(port, param);
 	} while ((param = getNextConfigParam(CONF_BIND_TO_ADDRESS, param)));

src/main.c

@@ -186,6 +186,8 @@ int main(int argc, char *argv[])
 	clock_t start;
 	GTimer *save_state_timer;
 
+	daemonize_close_stdin();
+
 #ifdef HAVE_LOCALE
 	/* initialize locale */
 	setlocale(LC_CTYPE,"");