mirror of https://github.com/octoleo/lsyncd.git
115 lines
1.8 KiB
C
115 lines
1.8 KiB
C
/*
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| singal.c from Lsyncd -- the Live (Mirror) Syncing Demon
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| Albeit this signal handling system at first seems to violate
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| rentry rules things are evened out by sigmasks taking care
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| only one signal at a time can enter the core.
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| License: GPLv2 (see COPYING) or any later version
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| Authors: Axel Kittenberger <axkibe@gmail.com>
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*/
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#include "feature.h"
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#include <stddef.h>
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#include <signal.h>
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#include <string.h>
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#define LUA_USE_APICHECK 1
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#include <lua.h>
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#include <lualib.h>
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#include <lauxlib.h>
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#include "mem.h"
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static volatile sig_atomic_t * queue;
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static int queue_len;
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static int queue_pos;
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/*
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| XXX
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*/
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static int *handlers;
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static int handlers_len;
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static int handlers_maxlen;
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/*
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| Set by TERM or HUP signal handler
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| telling Lsyncd should end or reset ASAP.
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*/
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volatile sig_atomic_t hup = 0;
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volatile sig_atomic_t term = 0;
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volatile sig_atomic_t sigcode = 0;
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/*
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| signal handler
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*/
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static void signal_child( int sig )
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{
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// Nothing!
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//
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// This signal handler is just installed so the kernel
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// keeps finished child processes as zombies waiting to be reaped.
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}
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/*
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| signal handler
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*/
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static void
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signal_handler( int sig )
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{
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switch( sig )
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{
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case SIGTERM:
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case SIGINT:
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term = 1;
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sigcode = sig;
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return;
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case SIGHUP:
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hup = 1;
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return;
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}
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}
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/*
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| Initializes signal handling.
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| Listens to SIGCHLD, but blocks it until pselect( )
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| opens the signal handler up.
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*/
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void
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signal_init( )
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{
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queue_len = 5;
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queue = s_malloc( queue_len * sizeof( sig_atomic_t ) );
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queue_pos = 0;
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handlers_maxlen = 5;
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handlers_len = 0;
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handlers = s_malloc( handlers_maxlen * sizeof( int * ) );
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}
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/*
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sigset_t set;
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sigemptyset( &set );
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sigaddset( &set, SIGCHLD );
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signal( SIGCHLD, signal_child );
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sigprocmask( SIG_BLOCK, &set, NULL );
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signal( SIGHUP, signal_handler );
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signal( SIGTERM, signal_handler );
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signal( SIGINT, signal_handler );
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}
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*/
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