Very Computer

 man gettimeofday
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gettimeofday(3C)       C Library Functions       gettimeofday(3C)

NAME
     gettimeofday, settimeofday - get or set the date and time

SYNOPSIS
     #include <sys/time.h>

     int gettimeofday(struct timeval *tp);

....

#ifdef __cplusplus
int gettimeofday(struct timeval *, void *);
int settimeofday(struct timeval *, void *);
#endif

What is  void* for?

This makes it very hard to write code that compiles on other machines.

#ifdef Solaris24
gettimeofday(time);
#elseif SYSV
gettimeofday(time);
#else
gettimeofday(time, timezone);
#endif

--
        - Bill

Quote:>What is  void* for?

The second argument of gettimeofday use to be a "struct timezone *"
from the time when the kernel kept the timezone.  This parameter
is now obsolete and gettimeofday no longer needs a second parameter
so it was dropped in teh SVID (I think).  It's been added back
as a dummy parameter in the latest X/Open spec.

Quote:>This makes it very hard to write code that compiles on other machines.

Why do you make a difference between SYSV and Solaris24??

Quote:>#ifdef Solaris24
>#elseif SYSV

I'd suggest passing "NULL" as second argument, if a second argument is
needed.

I'd prefer a prototype either with one argument over one with two
arguments.  Programs that expect a timezone parameter to be filled in with
a non-bogus value should break so they can be fixed.  But the standard
apparently is differnt.

Casper
--
Casper Dik - Network Security Engineer - Sun Microsystems
This article is posted from my guest account at the University

Opinions expressed here are mine (but you're welcome to share them with me)