/*
* Copyright (C) 2004-2006 Andre Noll <maan@systemlinux.org>
*
- * 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 2 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, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
+ * Licensed under the GPL v2. For licencing details see COPYING.
*/
/** \file signal.c signal handling functions */
-
+#include <signal.h>
+#include <sys/types.h>
+#include <dirent.h>
#include "para.h"
+#include "error.h"
#include "fd.h"
-#include <signal.h>
-
-#include "error.h"
static int signal_pipe[2];
/**
- * initialize the paraslash signal subsystem
+ * Initialize the paraslash signal subsystem.
*
* This function creates a pipe, the signal pipe, to deliver pending
* signals to the application (Bernstein's trick). It should be called
*/
int para_signal_init(void)
{
- int ret = -E_SIGNAL_PIPE;
- if (pipe(signal_pipe))
+ int ret;
+ if (pipe(signal_pipe) < 0) {
+ ret = -ERRNO_TO_PARA_ERROR(errno);
goto err_out;
+ }
ret = mark_fd_nonblock(signal_pipe[0]);
if (ret < 0)
goto err_out;
if (pid <= 0) {
if (pid < 0)
pid = -E_WAITPID;
- return 0;
+ return pid;
}
if (WIFEXITED(status))
PARA_DEBUG_LOG("child %i exited. Exit status: %i\n", pid,
* This should be called if the fd for the signal pipe is ready for reading.
*
* \return On success, the number of the received signal is returned. \p
- * -E_SIGNAL_READ is returned if a read error occured while reading the signal
+ * -E_SIGNAL_READ is returned if a read error occurred while reading the signal
* pipe. If the read was interrupted by another signal the function returns 0.
*/
int para_next_signal(void)