mirror of
https://github.com/octoleo/lsyncd.git
synced 2024-11-11 07:40:55 +00:00
134 lines
3.1 KiB
C
134 lines
3.1 KiB
C
/**
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* lsyncd.h Live (Mirror) Syncing Demon
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*
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* Interface between the core modules.
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*
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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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*/
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#ifndef LSYNCD_H
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#define LSYNCD_H
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// some older machines need this to see pselect
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#define _DEFAULT_SOURCE 1
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#define _XOPEN_SOURCE 700
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#define _DARWIN_C_SOURCE 1
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#define LUA_COMPAT_ALL
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#define LUA_COMPAT_5_1
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// includes needed for headerfile
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#include "config.h"
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#include <signal.h>
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#include <stdbool.h>
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#include <stdlib.h>
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#define LUA_USE_APICHECK 1
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#include <lua.h>
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#define LSYNCD_CORE_LIBNAME "core"
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#define LSYNCD_INOTIFY_LIBNAME "inotify"
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/*
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| Workaround to register a library for different lua versions.
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*/
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#if LUA_VERSION_NUM > 502
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#define lua_compat_register( L, name, lib ) \
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{ \
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lua_newtable((L)); \
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luaL_setfuncs((L), (lib), 0); \
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}
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#else
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#define lua_compat_register( L, name, lib ) \
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{luaL_register( (L), (name), (lib) );}
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#endif
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/*
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* Lsyncd runtime configuration
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*/
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extern struct settings {
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char * log_file; // If not NULL Lsyncd logs into this file.
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bool log_syslog; // If true Lsyncd sends log messages to syslog
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char * log_ident; // If not NULL the syslog identity (otherwise "Lsyncd")
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int log_facility; // The syslog facility
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int log_level; // -1 logs everything, 0 normal mode, LOG_ERROR errors only.
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} settings;
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/*
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* time comparisons - wrap around safe
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*/
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#define time_after(a,b) ((long)(b) - (long)(a) < 0)
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#define time_before(a,b) time_after(b,a)
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#define time_after_eq(a,b) ((long)(a) - (long)(b) >= 0)
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#define time_before_eq(a,b) time_after_eq(b,a)
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// returns (on Lua stack) the current kernels * clock state (jiffies)
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extern int l_now(lua_State *L);
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// pushes a runner function and the runner error handler onto Lua stack
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extern void load_mci(lua_State *L, const char *name);
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// set to 1 on hup signal or term signal
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extern volatile sig_atomic_t hup;
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extern volatile sig_atomic_t term;
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/*
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| File-descriptor helpers
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*/
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// Sets the non-blocking flag for a file descriptor.
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extern void non_block_fd(int fd);
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// Sets the close-on-exit flag for a file descriptor.
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extern void close_exec_fd(int fd);
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/**
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* An observance to be called when a file descritor becomes
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* read-ready or write-ready.
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*/
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struct observance {
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// The file descriptor to observe.
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int fd;
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// Function to call when read becomes ready.
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void (*ready)(lua_State *, struct observance *);
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// Function to call when write becomes ready.
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void (*writey)(lua_State *, struct observance *);
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// Function to call to clean up
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void (*tidy)(struct observance *);
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// Extra tokens to pass to the functions.
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void *extra;
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};
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// makes the core observe a file descriptor
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extern void observe_fd(
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int fd,
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void (*ready) (lua_State *, struct observance *),
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void (*writey)(lua_State *, struct observance *),
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void (*tidy) (struct observance *),
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void *extra
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);
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// makes the big select for all observed fds
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extern void observe_select( lua_State * L, struct timespec const * timeout );
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// tidies up all observances
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extern void observe_tidy_all( );
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// stops the core to observe a file descriptor
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extern void nonobserve_fd(int fd);
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#endif
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