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122 lines
3.2 KiB
C
122 lines
3.2 KiB
C
/*
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* OpenMODBUS/TCP to RS-232/485 MODBUS RTU gateway
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*
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* log.c - debug logging facility
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*
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* Copyright (c) 2002-2003, 2013, Victor Antonovich (v.antonovich@gmail.com)
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* - Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* - Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $Id: log.c,v 1.6 2015/02/25 10:33:57 kapyar Exp $
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*/
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#include "log.h"
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#ifdef LOG
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#include "cfg.h"
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/* log file full name */
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char logfullname[INTBUFSIZE + 1];
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int
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log_init(char *logname)
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{
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FILE *logfile;
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int maxlen = INTBUFSIZE;
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/* checking log file name */
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if (*logname == '/')
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strncpy(logfullname, logname, maxlen);
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else
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{
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if (!*logname)
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{
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/* logfile isn't needed */
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*logfullname = '\0';
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return RC_OK;
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}
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/* append default log path */
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strncpy(logfullname, LOGPATH, maxlen);
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maxlen -= strlen(logfullname);
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strncat(logfullname, logname, maxlen);
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}
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logfile = fopen(logfullname, "at");
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if (logfile)
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{
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fclose(logfile);
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return RC_OK;
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}
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return RC_ERR;
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}
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/* Append message STRING to log file LOGNAME */
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int
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log_app(char *logname, char *string)
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{
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FILE *logfile;
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logfile = fopen(logname, "at");
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if (logfile)
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{
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fputs(string, logfile);
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fclose(logfile);
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return RC_OK;
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}
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return RC_ERR;
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}
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/* Put message with format FMT with errorlevel LEVEL to log file */
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void
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logw(int level, char *fmt, ...)
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{
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#ifdef HRDATE
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time_t tt;
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struct tm *t;
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#else
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struct timeval tv;
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#endif
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va_list args;
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int strsize = 0;
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static char str[INTBUFSIZE + 1] = {0}, *p;
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if (level > cfg.dbglvl) return;
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#ifdef HRDATE
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tt = time(NULL);
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t = localtime(&tt);
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strsize += strftime(str, 32, "%d %b %Y %H:%M:%S ", t);
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#else
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(void)gettimeofday(&tv, NULL);
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strsize += snprintf(str, 32, "%06lu:%06lu ", tv.tv_sec, tv.tv_usec);
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#endif
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va_start(args, fmt);
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p = str + strsize;
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strsize += vsnprintf(p, INTBUFSIZE - strsize, fmt, args);
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va_end(args);
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strcpy(str + strsize++, "\n");
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if (!isdaemon) fprintf(stderr, "%s", str);
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if (*logfullname == '\0') return;
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log_app(logfullname, str);
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}
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#endif
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