Re^2: how to properly handle the closing of pipe? read from the pipe unzip-c and get out before

[Eliya]

in reply to Re: how to properly handle the closing of pipe? read from the pipe unzip-c and get out before
in thread how to properly handle the closing of pipe? read from the pipe unzip-c and get out before

In your croak statement, you should be using $!, not $ERRNO.

Why?  As he's using English, $ERRNO should be the same as $!.

[Illuminatus]

You are right, of course. I never use anything but $!, so I had forgotten this. The OP error output seemed to indicate that $ERRNO was blank. I was unsure as to why, or whether he simply omitted it. At any rate, it looks like his problem was fixed by changing the params to unzip

fnord

[mishin]

unzip fixed - yes,but error after the close of the pipe is still
$ perl pipe_quest.pl
unable to close: unzip -p test.zip utp.live.stp.published.messages.txt at pipe_quest.pl line 29

[Illuminatus]

Another check of the unzip man page yields the likely reason for your problem. Closing a pipe causes the writer (unzip in this case) to receive SIGPIPE. unzip subsequently returns a non-zero exit status (sets $? to SIGPIPE, or 13), which may be causing croak to fire. You may want to change you logic to not croak if the close fails, but $? is set to 13

fnord