which: treat busybox as a special case

Busybox knows the path to its own executable even if it isn't on
PATH.  Treat this as a special case and print the path.

`which busybox` is used in testsuite/busybox.tests

1 files changed, 8 insertions, 1 deletions

diff --git a/debianutils/which.c b/debianutils/which.c
index 9613c6fc5..13f922615 100644
--- a/debianutils/which.c
+++ b/debianutils/which.c
@@ -48,7 +48,14 @@ int which_main(int argc UNUSED_PARAM, char **argv)
                 char *p;
 
 #if ENABLE_FEATURE_SH_STANDALONE
-                if (find_applet_by_name(*argv) >= 0 ||
+                if (strcmp(*argv, "busybox") == 0 &&
+                                is_suffixed_with(bb_busybox_exec_path, "busybox.exe")) {
+                        missing = 0;
+                        puts(bb_busybox_exec_path);
+                        if (!option_mask32) /* -a not set */
+                                break;
+                }
+                else if (find_applet_by_name(*argv) >= 0 ||
                                 is_prefixed_with(*argv, "busybox")) {
                         missing = 0;
                         puts(*argv);