Hi, all monks:
There are two ways to launch system commands in perl, one is by the system operator, and the other is by the backquotes operator.
The system operator can only get the exit status of the command, and the backquotes operator can only get the output of the command.
Sometimes I want to get both the exit status and the output of the command, so I can process the output base on the exit status. Usually I do it by this way: first, launch the command by the system operator to get the exit status, then launch the command again by backquotes operator to get the ouput. But this solution is not that good when launching some network commands, because the network status can be changed between the execution of the two commands.
So, my question is: Is there any way I can get both the exit status and the output of the command without launching it twice?
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.
| & || & |
| < || < |
| > || > |
| [ || [ |
| ] || ] ||