Beefy Boxes and Bandwidth Generously Provided by pair Networks
Perl-Sensitive Sunglasses

comment on

( #3333=superdoc: print w/replies, xml ) Need Help??

Checking my copy of Stevens APUE my reading (and vague recollections of actual behavior) confirms this; you're not going to get SIGPIPE until you actually write to the fd the child's closed. The SIGCHLD should be the first sign you get.

use IPC::Run qw( start pump ); use Log::Log4perl qw( :easy ); Log::Log4perl->easy_init($DEBUG); $SIG{$_} = eval qq{sub{INFO qq{Got $_}; 1}} for qw(CHLD PIPE); INFO q{Starting}; my $in=q{}; my $chld = start(["bash","-c","sleep 5"],q{<},\$in); ## This will get CLHD and sleep will exit early INFO q{Sleeping}; my $r=sleep(10); WARN( qq{$r, $!} ); ## This will trigger PIPE $in .= qq{FOO}; pump $chld; ## This won't be reached. INFO q{Done} __END__ 2021/01/13 15:07:42 Starting 2021/01/13 15:07:42 Sleeping 2021/01/13 15:07:47 Got CHLD 2021/01/13 15:07:47 5, Interrupted system call 2021/01/13 15:07:47 Got PIPE ack Broken pipe: write( 6, 'FOO' ) at ....

The cake is a lie.
The cake is a lie.
The cake is a lie.

In reply to Re^2: Detect whether a writeable filehandle has closed? by Fletch
in thread Detect whether a writeable filehandle has closed? by jdporter

Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post; it's "PerlMonks-approved HTML":

  • Are you posting in the right place? Check out Where do I post X? to know for sure.
  • Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
    <code> <a> <b> <big> <blockquote> <br /> <dd> <dl> <dt> <em> <font> <h1> <h2> <h3> <h4> <h5> <h6> <hr /> <i> <li> <nbsp> <ol> <p> <small> <strike> <strong> <sub> <sup> <table> <td> <th> <tr> <tt> <u> <ul>
  • Snippets of code should be wrapped in <code> tags not <pre> tags. In fact, <pre> tags should generally be avoided. If they must be used, extreme care should be taken to ensure that their contents do not have long lines (<70 chars), in order to prevent horizontal scrolling (and possible janitor intervention).
  • Want more info? How to link or or How to display code and escape characters are good places to start.
Log In?

What's my password?
Create A New User
Domain Nodelet?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others chanting in the Monastery: (2)
As of 2022-07-07 04:20 GMT
Find Nodes?
    Voting Booth?

    No recent polls found