libbb/concat_path_file.c

   1 /* vi: set sw=4 ts=4: */
   2 /*
   3  * Utility routines.
   4  *
   5  * Copyright (C) many different people.  If you wrote this, please
   6  * acknowledge your work.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful, but
  14  * WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16  * General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  21  * USA
  22  */
  23
  24 /* concatenate path and file name to new allocation buffer,
  25  * not addition '/' if path name already have '/'
  26 */
  27
  28 #include <string.h>
  29 #include "libbb.h"
  30
  31 extern char *concat_path_file(const char *path, const char *filename)
  32 {
  33         char *outbuf;
  34         char *lc;
  35
  36         if (!path)
  37             path="";
  38         lc = last_char_is(path, '/');
  39         while (*filename == '/')
  40                 filename++;
  41         outbuf = xmalloc(strlen(path)+strlen(filename)+1+(lc==NULL));
  42         sprintf(outbuf, "%s%s%s", path, (lc==NULL)? "/" : "", filename);
  43
  44         return outbuf;
  45 }