I'm trying to redirect NSLog()'s output to a file. Since it writes
to stderr, I should be able to do this with
stderr->_write = my_stderr_write ,
where `my_stderr_write' is a pointer to one of my functions. This
works just fine if I use fprintf() to write to stderr, but NSLog()
stubbornly refuses to call my function. What exactly is NSLog()
doing here that is so special?
What exaclty capability or behaviour are you expecting from the
logging function and what will it be use for?
It sounds that you will need replace NSLog() with your own logging
function "MyLog()".
void MyFLogv(FILE *fp, NSString *format, va_list argList) {
int old_fd = dup(fileno(stderr));
int new_fd = dup2(fileno(fp), fileno(stderr));
NSLogv(format, argList);
(void)dup2(old_fd, fileno(stderr));
}
FYI, you can use syslog(3) or perhaps asl(3). Logging is tuned by /
etc/syslog.conf and written to /var/log/*
Regards,
Rog
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