/* logger.c -- logging code Copyright (C) 2004-2006 Guus Sliepen 2004-2005 Ivo Timmermans This program 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. This program 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 this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ #include "system.h" #include "conf.h" #include "meta.h" #include "logger.h" #include "connection.h" #include "control_common.h" debug_t debug_level = DEBUG_NOTHING; static logmode_t logmode = LOGMODE_STDERR; static pid_t logpid; extern char *logfilename; static FILE *logfile = NULL; #ifdef HAVE_MINGW static HANDLE loghandle = NULL; #endif static const char *logident = NULL; bool logcontrol = false; void openlogger(const char *ident, logmode_t mode) { logident = ident; logmode = mode; switch(mode) { case LOGMODE_STDERR: logpid = getpid(); break; case LOGMODE_FILE: logpid = getpid(); logfile = fopen(logfilename, "a"); if(!logfile) { fprintf(stderr, "Could not open log file %s: %s\n", logfilename, strerror(errno)); logmode = LOGMODE_NULL; } break; case LOGMODE_SYSLOG: #ifdef HAVE_MINGW loghandle = RegisterEventSource(NULL, logident); if(!loghandle) { fprintf(stderr, "Could not open log handle!"); logmode = LOGMODE_NULL; } break; #else #ifdef HAVE_SYSLOG_H openlog(logident, LOG_CONS | LOG_PID, LOG_DAEMON); break; #endif #endif case LOGMODE_NULL: break; } } void reopenlogger() { if(logmode != LOGMODE_FILE) return; fflush(logfile); FILE *newfile = fopen(logfilename, "a"); if(!newfile) { logger(DEBUG_ALWAYS, LOG_ERR, "Unable to reopen log file %s: %s\n", logfilename, strerror(errno)); return; } fclose(logfile); logfile = newfile; } void logger(int level, int priority, const char *format, ...) { va_list ap; char timestr[32] = ""; char message[1024] = ""; time_t now; static bool suppress = false; // Bail out early if there is nothing to do. if(suppress) return; if(!logcontrol && (level > debug_level || logmode == LOGMODE_NULL)) return; va_start(ap, format); vsnprintf(message, sizeof message, format, ap); va_end(ap); if(level <= debug_level) { switch(logmode) { case LOGMODE_STDERR: fprintf(stderr, "%s\n", message); fflush(stderr); break; case LOGMODE_FILE: now = time(NULL); strftime(timestr, sizeof timestr, "%Y-%m-%d %H:%M:%S", localtime(&now)); fprintf(logfile, "%s %s[%ld]: %s\n", timestr, logident, (long)logpid, message); fflush(logfile); break; case LOGMODE_SYSLOG: #ifdef HAVE_MINGW { const char *messages[] = {message}; ReportEvent(loghandle, priority, 0, 0, NULL, 1, 0, messages, NULL); } #else #ifdef HAVE_SYSLOG_H syslog(priority, "%s", message); #endif #endif break; case LOGMODE_NULL: break; } } if(logcontrol) { suppress = true; logcontrol = false; for(splay_node_t *node = connection_tree->head; node; node = node->next) { connection_t *c = node->data; if(!c->status.log) continue; logcontrol = true; if(level > (c->outcompression >= 0 ? c->outcompression : debug_level)) continue; int len = strlen(message); if(send_request(c, "%d %d %d", CONTROL, REQ_LOG, len)) send_meta(c, message, len); } suppress = false; } } void closelogger(void) { switch(logmode) { case LOGMODE_FILE: fclose(logfile); break; case LOGMODE_SYSLOG: #ifdef HAVE_MINGW DeregisterEventSource(loghandle); break; #else #ifdef HAVE_SYSLOG_H closelog(); break; #endif #endif case LOGMODE_NULL: case LOGMODE_STDERR: break; break; } }