libbb/concat_path_file.c

   1 /* vi: set sw=4 ts=4: */
   2 /*
   3  * Utility routines.
   4  *
   5  * Copyright (C) many different people.
   6  * If you wrote this, please acknowledge your work.
   7  *
   8  * Licensed under GPLv2 or later, see file LICENSE in this source tree.
   9  */
  10 #include "libbb.h"
  11
  12 /* Concatenate path and filename to new allocated buffer.
  13  * Add '/' only as needed (no duplicate // are produced).
  14  * If path is NULL, it is assumed to be "/".
  15  * filename should not be NULL.
  16  */
  17
  18 char* FAST_FUNC concat_path_file(const char *path, const char *filename)
  19 {
  20         char *lc;
  21
  22         if (!path)
  23                 path = "";
  24         lc = last_char_is(path, '/');
  25         while (*filename == '/')
  26                 filename++;
  27         return xasprintf("%s%s%s", path, (lc==NULL ? "/" : ""), filename);
  28 }