preinit: create a sentinel file during preinit

Signed-off-by: John Crispin <john@phrozen.org>

diff --git a/initd/preinit.c b/initd/preinit.c
index f38d8ef2a014acac7311a06a16c7a2401907debb..51fde31a5c351c4745ded5499d1175eb95b81b41 100644 (file)
--- a/initd/preinit.c
+++ b/initd/preinit.c
@@ -15,6 +15,7 @@
 #include <sys/stat.h>
 #include <sys/types.h>
 #include <sys/mount.h>
+#include <fcntl.h>
 
 #include <libubox/uloop.h>
 #include <libubox/utils.h>
@@ -64,6 +65,7 @@ spawn_procd(struct uloop_process *proc, int ret)
 
        unsetenv("INITRAMFS");
        unsetenv("PREINIT");
+       unlink("/tmp/.preinit");
        DEBUG(2, "Exec to real procd now\n");
        if (wdt_fd)
                setenv("WDTFD", wdt_fd, 1);
@@ -104,6 +106,7 @@ preinit(void)
        uloop_process_add(&plugd_proc);
 
        setenv("PREINIT", "1", 1);
+       creat("/tmp/.preinit", 0600);
 
        preinit_proc.cb = spawn_procd;
        preinit_proc.pid = fork();