LinuxQuestions.org - creating a log file

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creating a log file

I am creating a log file for an application I am writing. The text file has each line representing a log message. Each line needs a time stamp so that we can see when that event happened. What would be the correct time related functions to use with g++ to get these time values ?

Thanks in advance,
Tom

try http://this. Third one down seems to be good.

hope this helps,

Code:

void logStatus(char *logMsg,...)

{

  char info[200];

  char eventTime[200];

  va_list alist;

  time_t  logtime;

  struct tm *now = NULL;



  memset(info, '\0', 200);

  memset(eventTime, '\0', 200);



  va_start(alist, logMsg);

  vsprintf(info, logMsg, alist);

  va_end(alist);



  time(&logtime);

  now=localtime(&logtime);



        fprintf(<your_logfile_pointer>, "%04d-%02d-%02d %02d:%02d:%02d %s\n", 

        1900 + now->tm_year, now->tm_mon + 1, now->tm_mday, 

        now->tm_hour, now->tm_min, now->tm_sec, info); 

}

any part of the code to log a message in to the log file
can make a call to this function

log file would have the appropriate message with time stamp

the log file can be opened , logged with message and closed
upon each time a message can is logged

else can be opened only once and the file pointer can be made available as a global pointer