rpm: respect BB_SYSTEMROOTHEADmaster

Update the 'rpm' applet so it also respects the BB_SYSTEMROOT
environment variable.

Replace chdir_system_drive() with xchdir_system_drive(), which
exits on failure to change directory.

Saves 32-36 bytes.

(GitHub PR #603)

Signed-off-by: Ron Yorston <rmy@pobox.com>

1 files changed, 4 insertions, 7 deletions

diff --git a/win32/mingw.c b/win32/mingw.c
index 28ee81e4e..6e6b20e80 100644
--- a/win32/mingw.c
+++ b/win32/mingw.c
@@ -2461,14 +2461,11 @@ const char * FAST_FUNC get_system_drive(void)
         return getenv(BB_SYSTEMROOT) ?: drive;
 }
 
-int chdir_system_drive(void)
+void xchdir_system_drive(void)
 {
-        const char *sd = get_system_drive();
-        int ret = -1;
-
-        if (*sd)
-                ret = chdir(auto_string(concat_path_file(sd, "")));
-        return ret;
+        char *path = concat_path_file(get_system_drive(), "");
+        xchdir(path);
+        free(path);
 }
 
 /*