main: Increase FD limit

This defaults to 1024, which is tiny, but is a requirement
for processes using the deprecated `select` function.

We must reset this back whenever we fork to start a new process,
as this is inherited, and breaks applications using `select` otherwise.

Signed-off-by: Joshua Ashton <joshua@froggi.es>

src/common/spawn.c

@@ -10,6 +10,7 @@
 #include <unistd.h>
 #include <wlr/util/log.h>
 #include "common/spawn.h"
+#include "common/fd_util.h"
 
 void
 spawn_async_no_shell(char const *command)
@@ -39,6 +40,8 @@ spawn_async_no_shell(char const *command)
 		wlr_log(WLR_ERROR, "unable to fork()");
 		goto out;
 	case 0:
+		restore_nofile_limit();
+
 		setsid();
 		sigset_t set;
 		sigemptyset(&set);

src/main.c

@@ -9,6 +9,7 @@
 #include "theme.h"
 #include "xbm/xbm.h"
 #include "menu/menu.h"
+#include "common/fd_util.h"
 
 struct rcxml rc = { 0 };
 
@@ -85,6 +86,8 @@ main(int argc, char *argv[])
 		exit(EXIT_FAILURE);
 	}
 
+	increase_nofile_limit();
+
 	struct server server = { 0 };
 	server_init(&server);
 	server_start(&server);