dsignal.h(3) libdaemon dsignal.h(3)
NAME
dsignal.h - Contains the API for serializing signals to a pipe for usage
with select() or poll().
SYNOPSIS
Functions
int daemon_signal_init (int s,...)
Installs signal handlers for the specified signals.
int daemon_signal_install (int s)
Install a signal handler for the specified signal.
void daemon_signal_done (void)
Free resources of signal handling, should be called before daemon
exit.
int daemon_signal_next (void)
Return the next signal received.
int daemon_signal_fd (void)
Return the file descriptor the daemon should select() on for
reading.
Detailed Description
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 received with
daemon_signal_next(). You should call daemon_signal_done() before
exiting.
Definition in file dsignal.h.
Function Documentation
void daemon_signal_done (void)
Free resources of signal handling, should be called before daemon exit.
Examples
testd.c.
int daemon_signal_fd (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.
Returns
The file descriptor or negative on failure
Examples
testd.c.
int daemon_signal_init (int s, ...)
Installs signal handlers for the specified signals.
Parameters
s,... The signals to install handlers for. The list should be
terminated by 0
Returns
zero on success, nonzero on failure
Examples
testd.c.
int daemon_signal_install (int s)
Install a signal handler for the specified signal.
Parameters
s The signalto install handler for
Returns
zero onsuccess,nonzero on failure
int daemon_signal_next (void)
Return the next signal received. This function will not block. Instead
it returns 0 if no signal is queued.
Returns
The next queued signal if one is queued, zero if none is queued,
negative on failure.
Examples
testd.c.
Author
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Version 0.14 Mon Dec 21 2020 dsignal.h(3)
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