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t-dotlock.c
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/* t-dotlock.c - Module test for dotlock.c
* Copyright (C) 2011 Free Software Foundation, Inc.
*
* This file is part of GnuPG.
*
* GnuPG 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.
*
* GnuPG 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/>.
*/
/* Note: This is a standalone test program which does not rely on any
GnuPG helper files. However, it may also be build as part of the
GnuPG build system. */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
/* Some quick replacements for stuff we usually expect to be defined
in config.h. Define HAVE_POSIX_SYSTEM for better readability. */
#if !defined (HAVE_DOSISH_SYSTEM) && defined(_WIN32)
# define HAVE_DOSISH_SYSTEM 1
#endif
#if !defined (HAVE_DOSISH_SYSTEM) && !defined (HAVE_POSIX_SYSTEM)
# define HAVE_POSIX_SYSTEM 1
#endif
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#include <errno.h>
#include <signal.h>
#include <unistd.h>
#include "dotlock.h"
#define PGM "t-dotlock"
static volatile int ctrl_c_pending;
static void
control_c_handler (int signo)
{
(void)signo;
ctrl_c_pending = 1;
}
static void
die (const char *format, ...)
{
va_list arg_ptr;
va_start (arg_ptr, format);
fprintf (stderr, PGM "[%lu]: ", (unsigned long)getpid ());
vfprintf (stderr, format, arg_ptr);
putc ('\n', stderr);
va_end (arg_ptr);
exit (1);
}
static void
inf (const char *format, ...)
{
va_list arg_ptr;
va_start (arg_ptr, format);
fprintf (stderr, PGM "[%lu]: ", (unsigned long)getpid ());
vfprintf (stderr, format, arg_ptr);
putc ('\n', stderr);
va_end (arg_ptr);
}
static void
lock_and_unlock (const char *fname)
{
dotlock_t h;
h = dotlock_create (fname, 0);
if (!h)
die ("error creating lock file for '%s': %s", fname, strerror (errno));
inf ("lock created");
while (!ctrl_c_pending)
{
if (dotlock_take (h, -1))
die ("error taking lock");
inf ("lock taken");
sleep (1);
if (dotlock_release (h))
die ("error releasing lock");
inf ("lock released");
sleep (1);
}
dotlock_destroy (h);
inf ("lock destroyed");
}
int
main (int argc, char **argv)
{
const char *fname;
if (argc > 1)
fname = argv[1];
else
fname = "t-dotlock.tmp";
{
struct sigaction nact;
nact.sa_handler = control_c_handler;
nact.sa_flags = 0;
sigaction (SIGINT, &nact, NULL);
}
dotlock_create (NULL, 0); /* Initialize (optional). */
lock_and_unlock (fname);
return 0;
}
/*
Local Variables:
compile-command: "cc -Wall -O2 -D_FILE_OFFSET_BITS=64 -o t-dotlock t-dotlock.c dotlock.c"
End:
*/

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