/* Program name management.
Copyright (C) 2001-2003, 2005-2010 Free Software Foundation, Inc.
Written by Bruno Haible <bruno@clisp.org>, 2001.
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. */
#include "progname.h"
#include <errno.h> /* get program_invocation_name declaration */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
/* String containing name the program is called with.
To be initialized by main(). */
/* Set program_name, based on argv[0].
argv0 must be a string allocated with indefinite extent, and must not be
modified after this call. */
void
{
/* 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.
const char *slash;
const char *base;
/* Sanity check. POSIX requires the invoking process to pass a non-NULL
argv[0]. */
{
/* It's a bug in the invoking program. Help diagnosing it. */
fputs ("A NULL argv[0] was passed through an exec system call.\n",
stderr);
abort ();
}
{
{
/* On glibc systems, remove the "lt-" prefix from the variable
program_invocation_short_name. */
program_invocation_short_name = (char *) argv0;
#endif
}
}
/* But don't strip off a leading <dirname>/ in general, because when the user
runs
he should get the error message
not
cp: `foo' and `foo' are the same file
*/
/* On glibc systems, the error() function comes from libc and uses the
variable program_invocation_name, not program_name. So set this variable
as well. */
program_invocation_name = (char *) argv0;
#endif
}