Bruce Momjian <pgman@candle.pha.pa.us> writes:
> Should I just change them all to:
> errno = 0; /* avoid checking result for failure */
No, that's still a completely inaccurate description of the reason
for having the statement.
> or should I add a macro to c.h as:
> /* Sometimes we need to clear errno so we can check errno
> * without having to check for a failure value from the function
> * call.
> */
> #define CLEAR_ERRNO \\
> do { \
> errno = 0; \\
> while (0);
I vote "neither". Anyone who doesn't understand what this is for will
need to go read the C library man pages for a bit anyway. Nor do I find
"CLEAR_ERRNO" an improvement over "errno = 0".
regards, tom lane