@ikegami: Fellow Monks, can you please explain in detail the need for the explicit close here?

Normally opening with an existing FH closes the original file or at least I never noticed a problem in cutting this corner in one-shots, one-liners or inline shell scripts (but usually avoiding read, sysread, tty's and STDIN/OUT/ERR).

Thanx,
Peter

Update: - ok, any takers for this riddle with more time? Will summarize if pointed correctly with keywords and RTFM's to check :)

From perldoc -f close:

You don’t have to close FILEHANDLE if you are immediately going to do another "open" on it, because "open" will close it for you. (See "open".) However, an explicit "close" on an input file resets the line counter ($.), while the implicit close done by "open" does not.

There are a few more notes on pipes, but those don't seem to match the opener's situation either. Skimming perlopentut I didn't see pointers of interest - au contraire, it even _seems_ to imply that reopening w/o close (my reading on the lack of close() in the Playing with STDIN/STDOUT section) for STDIN/STDOUT is fine. Or is there indeed some hardcoded magic of it being STDOUT we insist to read from??

What do I miss?

In reply to Re^2: reading from a file after a seek isn't working for me by jakobi
in thread reading from a file after a seek isn't working for me by samwyse

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.