which,ash: changes to which/command/type

Change how 'which' detects if it was run from a standalone shell:
the shell passes the undocumented '-s' option.  This is stricter
and more reliable than the previous method of checking the name
of the binary.

Add a function to determine the binary associated with a given
applet name.  This makes it possible for 'which' and 'command -v'
to list the correct binary even for applets other than 'busybox'.
For example, when the binary is called 'sh.exe' 'which sh' will
report its path.

In standalone shell mode 'command -V' and 'type' now report "xxx
is a builtin applet" rather than "xxx is xxx", which is true but
not very illuminating.

(GitHub issue #248)

1 files changed, 1 insertions, 0 deletions

diff --git a/include/mingw.h b/include/mingw.h
index 8a9610898..5e01b874e 100644
--- a/include/mingw.h
+++ b/include/mingw.h
@@ -584,3 +584,4 @@ int unix_path(const char *path);
 int has_path(const char *file);
 int is_relative_path(const char *path);
 char *get_last_slash(const char *path);
+const char *applet_to_exe(const char *name);