+
−/* Program name management.
+
−   Copyright (C) 2001-2003, 2005-2009 Free Software Foundation, Inc.
+
−   Written by Bruno Haible <haible@clisp.cons.org>, 2001.
+
−
+
−   This program is free software: you can redistribute it and/or modify
+
−   it under the terms of the GNU General Public License as published by
+
−   the Free Software Foundation; either version 3 of the License, or
+
−   (at your option) any later version.
+
−
+
−   This program is distributed in the hope that it will be useful,
+
−   but WITHOUT ANY WARRANTY; without even the implied warranty of
+
−   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+
−   GNU General Public License for more details.
+
−
+
−   You should have received a copy of the GNU General Public License
+
−   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
−
+
−
+
−#include <config.h>
+
−
+
−/* Specification.  */
+
−#undef ENABLE_RELOCATABLE /* avoid defining set_program_name as a macro */
+
−#include "progname.h"
+
−
+
−#include <errno.h> /* get program_invocation_name declaration */
+
−#include <string.h>
+
−
+
−
+
−/* String containing name the program is called with.
+
−   To be initialized by main().  */
+
−const char *program_name = NULL;
+
−
+
−/* Set program_name, based on argv[0].  */
+
−void
+
−set_program_name (const char *argv0)
+
−{
+
−  /* libtool creates a temporary executable whose name is sometimes prefixed
+
−     with "lt-" (depends on the platform).  It also makes argv[0] absolute.
+
−     But the name of the temporary executable is a detail that should not be
+
−     visible to the end user and to the test suite.
+
−     Remove this "<dirname>/.libs/" or "<dirname>/.libs/lt-" prefix here.  */
+
−  const char *slash;
+
−  const char *base;
+
−
+
−  slash = strrchr (argv0, '/');
+
−  base = (slash != NULL ? slash + 1 : argv0);
+
−  if (base - argv0 >= 7 && strncmp (base - 7, "/.libs/", 7) == 0)
+
−    {
+
−      argv0 = base;
+
−      if (strncmp (base, "lt-", 3) == 0)
+
−	argv0 = base + 3;
+
−    }
+
−
+
−  /* But don't strip off a leading <dirname>/ in general, because when the user
+
−     runs
+
−         /some/hidden/place/bin/cp foo foo
+
−     he should get the error message
+
−         /some/hidden/place/bin/cp: `foo' and `foo' are the same file
+
−     not
+
−         cp: `foo' and `foo' are the same file
+
−   */
+
−
+
−  program_name = argv0;
+
−
+
−  /* On glibc systems, when the gnulib module 'error' is not used, the error()
+
−     function comes from libc and uses the variable program_invocation_name,
+
−     not program_name.  So set this variable as well.  */
+
−#if HAVE_DECL_PROGRAM_INVOCATION_NAME
+
−  program_invocation_name = (char *) argv0;
+
−#endif
+
−}