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#ifndef foodaemonsignalhfoo
#define foodaemonsignalhfoo
/*
* This file is part of libdaemon.
*
* libdaemon 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.
*
* libdaemon 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 libdaemon; if not, write to the Free Software Foundation,
* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/
/** \file
*
* Contains the API for serializing signals to a pipe for
* usage with select() or poll().
*
* You should register all signals you
* wish to handle with select() in your main loop with
* daemon_signal_init() or daemon_signal_install(). After that you
* should sleep on the file descriptor returned by daemon_signal_fd()
* and get the next signal recieved with daemon_signal_next(). You
* should call daemon_signal_done() before exiting.
*/
/** Installs signal handlers for the specified signals
* @param s, ... The signals to install handlers for. The list should be terminated by -1
* @return zero on success, nonzero on failure
*/
int daemon_signal_init(int s, ...);
/** Install a signal handler for the specified signal
* @param s The signalto install handler for
* @return zero onsuccess,nonzero on failure
*/
int daemon_signal_install(int s);
/** Free resources of signal handling, should be called before daemon exit
*/
void daemon_signal_done(void);
/** Return the next signal recieved. This function will not
* block. Instead it returns 0 if no signal is queued.
* @return The next queued signal if one is queued, zero if none is
* queued, negative on failure.
*/
int daemon_signal_next(void);
/** Return the file descriptor the daemon should select() on for
* reading. Whenever the descriptor is ready you should call
* daemon_signal_next() to get the next signal queued.
* @return The file descriptor or negative on failure
*/
int daemon_signal_fd(void);
#endif
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