Patch from Denis Vlasenko to add xstat() and use it.
diff --git a/include/libbb.h b/include/libbb.h
index bc3fa59..0ec332b 100644
--- a/include/libbb.h
+++ b/include/libbb.h
@@ -122,6 +122,8 @@
 extern int   bb_fclose_nonstdin(FILE *f);
 extern void  bb_fflush_stdout_and_exit(int retval) ATTRIBUTE_NORETURN;
 
+extern void xstat(const char *filename, struct stat *buf);
+
 #define BB_GETOPT_ERROR 0x80000000UL
 extern const char *bb_opt_complementally;
 extern const struct option *bb_applet_long_options;