On 2015-05-17 07:40:28 -0700, Kevin J. McCarthy wrote:
> However, taking another look at close() in the perl book, I do see that
> $! may also be non-zero "if a syscall fails". I will add a check for
> that to the close() call (along with a comment that the callers are
> checking $?) and resend the patch later today. Does that sound good?
I think that's OK. The Perl manual gives:
If the filehandle came from a piped open, "close" returns false if
one of the other syscalls involved fails or if its program exits
with non-zero status. If the only problem was that the program
exited non-zero, $! will be set to 0. Closing a pipe also waits
for the process executing on the pipe to exit--in case you wish to
look at the output of the pipe afterwards--and implicitly puts the
exit status value of that command into $? and
${^CHILD_ERROR_NATIVE}".
with the example:
close OUTPUT # wait for sort to finish
or warn $! ? "Error closing sort pipe: $!"
: "Exit status $? from sort";
--
Vincent Lefèvre <[email protected]> - Web: <https://www.vinc17.net/>
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Work: CR INRIA - computer arithmetic / AriC project (LIP, ENS-Lyon)
