linux环境应用程序LOG日志打印（C语言）

下面是前段时间做项目用到的一个输出LOG日志的代码，每个文件最多记录10W行，超过10W行，将当前日志文件重命名，重新再打开。直接看代码吧，很简单！

int InitTCpRtpLog()
{

char log[256];

mkdir(TCP_RTP_LOG_PATH, 0755);

snprintf(log, sizeof(log), "%s/%s", TCP_RTP_LOG_PATH, TCP_RTP_LOG_FILE);
vTcpRtpLogHandle = fopen((char*)log, "a");
if (vTcpRtpLogHandle){
PrintMsgTrace("###%s(),creat log file %s sucessfull!\n",__FUNCTION__, log);

return 0;
}else{
PrintMsgTrace("###$s(), Fail openning event log file (errno=%s)\n", __FUNCTION__, strerror(errno));

return  - 1;
}
}
static int _rebuildTcpRtpLogFiles()
{

char tmp[256];
char tmp2[256];
char date[128];
time_t now;
struct tm ptm;

if (vTcpRtpLogHandle)
{
fclose(vTcpRtpLogHandle);
time(&now);
localtime_r(&now,&ptm);
strftime((char *)date, 128, "_%F_%T", &ptm);

snprintf(tmp, sizeof(tmp), "%s/%s", TCP_RTP_LOG_PATH, TCP_RTP_LOG_FILE);
snprintf(tmp2, sizeof(tmp2), "%s_%s.log", tmp,date);

remove(tmp2);
rename(tmp, tmp2);

vTcpRtpLogHandle = fopen((char*)tmp, "a");
}

return 1;
}

void LogTcpRtp(char *p_fmt, ...)
{
char date[256];
time_t now;
struct tm ptm;
va_list ap;

if (!vTcpRtpLogHandle){
return;
}

pthread_mutex_lock(&_vTcpRtpLogMutex);

time(&now);                   // Gets the system time

if (localtime_r(&now, &ptm))
{
strftime(date, sizeof (date), "%F %T", &ptm);
fprintf(vTcpRtpLogHandle, "[ %s ]:", date);

va_start(ap, p_fmt);
vfprintf(vTcpRtpLogHandle, p_fmt, ap);
va_end(ap);

fflush(vTcpRtpLogHandle);

_vCurTcpRtpLogNum++;
if (_vCurTcpRtpLogNum > MAX_RTP_TCP_NUMBER){
_rebuildTcpRtpLogFiles();
_vCurTcpRtpLogNum = 0;
}
}

pthread_mutex_unlock(&_vTcpRtpLogMutex);
}