ash: reject unknown long options

Commit 64f70cc755 (Add --login support) added code in options()
to handle the bash-compatible '--login' option.  In doing so it
committed BusyBox ash to silently accepting all other long
options.

Restore compatibility with other ash variants by rejecting unknown
long options.

(GitHub issue #457)

1 files changed, 5 insertions, 0 deletions

diff --git a/shell/ash.c b/shell/ash.c
index 5f231385a..8bbc19d1f 100644
--- a/shell/ash.c
+++ b/shell/ash.c
@@ -12821,11 +12821,16 @@ options(int *login_sh)
                                 if (val && (c == '-')) { /* long options */
                                         if (strcmp(p, "login") == 0) {
                                                 *login_sh = 1;
+#if ENABLE_PLATFORM_MINGW32
+                                                break;
+#endif
                                         }
 /* TODO: --noprofile: e.g. if I want to run emergency shell from sulogin,
  * I want minimal/no shell init scripts - but it insists on running it as "-ash"...
  */
+#if !ENABLE_PLATFORM_MINGW32
                                         break;
+#endif
                                 }
                         }
                         if (c == 'o') {