I've been looking all over for the answer to this question and it is either so simple that no one else bothers to ask it (and I'm an idiot) or it is very esoteric (and I'm a genius -- or would be if I knew the answer). I've got a module that carries it's own output handle around for doing output. It contains a function that lets the user pass in a new output handle. I want to check that you can actually write to this handle before accepting this as the module's new output channel. I can use fileno()
to check if it's open or not, but I can't seem to find a way to tell if it's open for writing or not. The closest thing seems to be to use select()
) to see if it's ready for writing. I'm not sure, though if that is good enough; it seems to me like you could have a filehandle open for writing, but not ready at that moment to be written to.
Anybody got any better ideas how to do this?
"If God had meant for us to think for ourselves he would have given us brains. Oh, wait..."
Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
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:
Outside of code tags, you may need to use entities for some characters:
- a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, 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, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
Link using PerlMonks shortcuts! What shortcuts can I use for linking?
See Writeup Formatting Tips and other pages linked from there for more info.
| & || & |
| < || < |
| > || > |
| [ || [ |
| ] || ] ||