1: /* Find path of executable.
    2:    Copyright (C) 1998, 1999, 2000, 2002, 2004 Free Software Foundation, Inc.
    3:    This file is part of the GNU C Library.
    4:    Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.
    5: 
    6:    The GNU C Library is free software; you can redistribute it and/or
    7:    modify it under the terms of the GNU Lesser General Public
    8:    License as published by the Free Software Foundation; either
    9:    version 2.1 of the License, or (at your option) any later version.
   10: 
   11:    The GNU C Library is distributed in the hope that it will be useful,
   12:    but WITHOUT ANY WARRANTY; without even the implied warranty of
   13:    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   14:    Lesser General Public License for more details.
   15: 
   16:    You should have received a copy of the GNU Lesser General Public
   17:    License along with the GNU C Library; if not, write to the Free
   18:    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   19:    02111-1307 USA.  */
   20: 
   21: #include <stdlib.h>
   22: #include <string.h>
   23: #include <sys/param.h>
   24: #include <ldsodefs.h>
   25: 
   26: #include <dl-dst.h>
   27: 
   28: 
   29: const char *
   30: _dl_get_origin (void)
   31: {
   32:   char *result = (char *) -1;
   33:   /* We use the environment variable LD_ORIGIN_PATH.  If it is set make
   34:      a copy and strip out trailing slashes.  */
   35:   if (GLRO(dl_origin_path) != NULL)
   36:     {
   37:       size_t len = strlen (GLRO(dl_origin_path));
   38:       result = (char *) malloc (len + 1);
   39:       if (result == NULL)
   40:         result = (char *) -1;
   41:       else
   42:         {
   43:           char *cp = __mempcpy (result, GLRO(dl_origin_path), len);
   44:           while (cp > result + 1 && cp[-1] == '/')
   45:             --cp;
   46:           *cp = '\0';
   47:         }
   48:     }
   49: 
   50:   return result;
   51: }