libbb: fix #!/bin/busybox

Commit 3476fb9f4c (ps: display interpreted script name in comm
column) required the applet start up code to detect the index
of the script in a shebang command line.

When a script starts with '#!/bin/busybox' the argument list is
shifted in busybox_main() but the script index wasn't adjusted
to match.  This caused the command to fail.

Make the proper adjustment.

Add 16 bytes.

(GitHub issue #357)

1 files changed, 4 insertions, 0 deletions

diff --git a/libbb/appletlib.c b/libbb/appletlib.c
index 8801c732d..bf9ae4603 100644
--- a/libbb/appletlib.c
+++ b/libbb/appletlib.c
@@ -1113,6 +1113,10 @@ int busybox_main(int argc UNUSED_PARAM, char **argv)
                 /* We support "busybox /a/path/to/applet args..." too. Allows for
                  * "#!/bin/busybox"-style wrappers
                  */
+#  if ENABLE_PLATFORM_MINGW32
+                if (interp)
+                        --interp;
+#  endif
                 applet_name = bb_get_last_path_component_nostrip(argv[0]);
         }
         run_applet_and_exit(applet_name, argv);