NOMMU re-exec trick shuld not depend on existence of "don't daemonize"

option for every affected applet (and dnsd, for example, don't have one).
Thus rework re-exec support to not require it. Code got smaller too.

1 files changed, 7 insertions, 0 deletions

diff --git a/applets/busybox.c b/applets/busybox.c
index 0387d79b7..5334827ca 100644
--- a/applets/busybox.c
+++ b/applets/busybox.c
@@ -7,6 +7,7 @@
 #include "busybox.h"
 
 const char *applet_name ATTRIBUTE_EXTERNALLY_VISIBLE;
+smallint re_execed;
 
 #ifdef CONFIG_FEATURE_INSTALLER
 /*
@@ -59,6 +60,12 @@ int main(int argc, char **argv)
 {
         const char *s;
 
+        /* NOMMU re-exec trick sets high-order bit in first byte of name */
+        if (argv[0][0] & 0x80) {
+                re_execed = 1;
+                argv[0][0] &= 0x7f;
+        }
+
         applet_name = argv[0];
         if (*applet_name == '-')
                 applet_name++;