hook

Just for fun I want to pipe all output text in a terminal to espeak . For example, after this is set up I should be able to type echo hi and hear "hi" spoken, or ls and hear my directory contents listed. The only promising method to capture output I've found so far is from here: http://www.linuxjournal.com/content/bash-redirections-using-exec This is what I have so far: npipe=/tmp/$$.tmp mknod $npipe p tee /dev/tty <$npipe | espeak & espeakpid=$! exec 1>&- exec 1>$npipe trap "rm -f $npipe; kill $espeakpid" EXIT It works (also printing a bunch of "Done" jobs), but creating the named pipe,

Good morning everyone. As the title says I'm trying to fire a function when an order is updated. More specifically I want to run this function when a custom field in the order page (admin side) is changed and then saved. I'm not looking to find out when an order is complete or when its status is updated, but just when this field is updated. Currently I'm using woocommerce_process_shop_order_meta hook but it doesn't seem to work. Any advice? Thank you! -- EDIT -- woocommerce_process_shop_order_meta is the righ hook to use, I was having an error in the function triggered by this hook so if you

I need to hijack all operating system calls of my own process. I cannot rewrite code as it is partly not my code (plug-ins). I need to be able to decide within my implementation of a specific system call, if I want to call the original implementation or not. Operating systems will be at first windows xp and higher versions. Later os x 10.5 and higher will follow. Starting on windows with 32 bit versions, later for all operating systems also 64 bit versions. I found a lot of documentation and tools about hooking other processes but I would hope my job is much simpler and I would hope for some

I'd like to write a script that examines the incoming changesets on a push to a mercurial server and rejects the push if the changesets do not conform to a particular standard. It seems like my options are the prechangegroup , pre-changegroup , and pretxnchangegroup hooks. Unfortunately, the prechangegroup and pre-changegroup hooks do not appear to have access to the incoming changesets, so I would need pretxnchangegroup . But according to the documentation at http://hgbook.red-bean.com/read/handling-repository-events-with-hooks.html#sec:hook:pretxnchangegroup , this can lead to inconsistent