On 2007-08-12 00:57:22 +0100, William Pursell wrote: > Here is a method for doing a timeout. I'm not arguing against > the claim that sh is limited, nor am I claiming that the method > presented here is robust (it doesn't work well if the function > has already completed, for example), but this certainly demonstrates > that it is possible to execute a command with a timeout. [...]
The timeout function keeps waiting even after the command has completed (when it has completed before the timeout, which is the normal case), and this is a real efficiency problem. Of course, I think that one can replace your "sleep $timeout" by a loop that would poll every second, but this is rather inelegant and possibly inefficient. Moreover, there is a possible race condition; I suppose that this can also be solved by trapping SIGCHLD. Also, if one wants to interrupt the script by Ctrl-C for instance, this doesn't work well (the command is not killed). -- Vincent Lefèvre <[EMAIL PROTECTED]> - Web: <http://www.vinc17.org/> 100% accessible validated (X)HTML - Blog: <http://www.vinc17.org/blog/> Work: CR INRIA - computer arithmetic / Arenaire project (LIP, ENS-Lyon) -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
