Line data    Source code

       1             : /* Program name management.
       2             :    Copyright (C) 2016 Free Software Foundation, Inc.
       3             : 
       4             :    This program is free software: you can redistribute it and/or modify
       5             :    it under the terms of the GNU General Public License as published by
       6             :    the Free Software Foundation; either version 3 of the License, or
       7             :    (at your option) any later version.
       8             : 
       9             :    This program is distributed in the hope that it will be useful,
      10             :    but WITHOUT ANY WARRANTY; without even the implied warranty of
      11             :    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      12             :    GNU General Public License for more details.
      13             : 
      14             :    You should have received a copy of the GNU General Public License
      15             :    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
      16             : 
      17             : #include <config.h>
      18             : 
      19             : /* Specification.  */
      20             : #include "getprogname.h"
      21             : 
      22             : #include <errno.h> /* get program_invocation_name declaration */
      23             : #include <stdlib.h> /* get __argv declaration */
      24             : 
      25             : #include "dirname.h"
      26             : 
      27             : #ifndef HAVE_GETPROGNAME
      28             : 
      29             : char const *
      30           0 : getprogname (void)
      31             : {
      32             : # if HAVE_DECL_PROGRAM_INVOCATION_SHORT_NAME
      33           0 :   return program_invocation_short_name;
      34             : # elif HAVE_DECL_PROGRAM_INVOCATION_NAME
      35             :   return last_component (program_invocation_name);
      36             : # elif HAVE_GETEXECNAME
      37             :   const char *p = getexecname ();
      38             :   if (!p)
      39             :     p = "?";
      40             :   return last_component (p);
      41             : # elif HAVE_DECL___ARGV
      42             :   const char *p = __argv && __argv[0] ? __argv[0] : "?";
      43             :   return last_component (p);
      44             : # else
      45             : #  error "getprogname module not ported to this OS"
      46             : # endif
      47             : }
      48             : 
      49             : #endif