int core_pidof(lua_State *L) {
const char *path = NULL, *key= NULL ;
int pid;
int top = lua_gettop(L);
if (top == 0) {
lua_pushnil(L);
lua_pushfstring(L, "wrong number of arguments for '%s'", "core_pidof");
return 2;
}
if (top > 0) path = lua_tostring(L, 1);
if (top > 1) key = lua_tostring(L, 2);
if (pidfile_exists(path) == UGERR) {
lua_pushnil(L);
lua_pushfstring(L, "cannot find the pidfile '%s'", path);
return 2;
}
if (pidfile_getpid(path, &pid) == UGERR) {
lua_pushnil(L);
lua_pushfstring(L, "get pid failed by pidfile '%s'", path);
return 2;
}
if (pidfile_verify(path) == UGOK ||
(key != NULL && proc_isrunning(pid, key) == UGOK)) {
lua_pushinteger(L, pid);
return 1;
}
lua_pushnil(L);
return 1;
}
void pidfile_init( const char *pidfile ) {
if( pidfile_exists( pidfile ) == 1 ) {
pss_fatal( "Daemon already running (pidfile %s exists)!\n", pidfile == NULL ? DEFAULT_PIDFILE : pidfile );
} else {
pidfile_create( pidfile );
}
}