What makes you think execution was successful? Like Perl is telling you, it wasn't successful. You closed its STDOUT before it was done writing to it.

Update: I figured out why 141. It's (1<<7)|SIGPIPE. This is the shell letting the parent know how its kid exited. 

# No shell involved, and the child died from SIGPIPE:
$ perl -e'open(PS,"ls . |") or die "$!"; close PS or die $!; printf("%
+04X\n", $?);'
000D

# The shell relaying how its child died via its exit code:
$ perl -e'open(PS,"ls . 2>/dev/null |") or die "$!"; close PS or die $
+!; printf("%04X\n", $?);'
8D00

[download]

In reply to Re: How to know the status of a command invoked by open function? by ikegami
in thread How to know the status of a command invoked by open function? by zhujian0805

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


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.