{"id":40,"date":"2006-07-12T13:18:01","date_gmt":"2006-07-12T11:18:01","guid":{"rendered":"http:\/\/www.hackenberger.at\/wordpress\/?page_id=40"},"modified":"2006-07-12T13:39:45","modified_gmt":"2006-07-12T11:39:45","slug":"how-to-configure-hotplugging-to-execute-a-specific-script-on-addingremoving-a-device","status":"publish","type":"page","link":"https:\/\/www.hackenberger.at\/blog\/linux-guides\/gentoo-guides\/how-to-configure-hotplugging-to-execute-a-specific-script-on-addingremoving-a-device\/","title":{"rendered":"Custom hotplugging scripts"},"content":{"rendered":"

Instructions how to configure hotplugging to execute a specific script on adding\/removing a device
\n<\/strong><\/p>\n

The first thing you have to do is to get hotplugging working in general. Visit \t\t\t\tLinux Hotplugging<\/a> to learn how \t\t\t\tto do that.
\nYou should have a file named usb.usermap in your \/etc\/hotplug\/ directory. This file \t\t\t\thandles to scripts for particular devices. You have to set several colums in this \t\t\t\tfile to get a script working. The first colum is the filename of the script. The \t\t\t\tscripts are always expected in \/etc\/hotplug\/usb\/. The next column is, i don’t know \t\t\t\twhat it is for. The next two are the Vendor and Product id of your device. \t\t\t\t\/proc\/bud\/usb\/devices helps you out with these as soon as you plug in your device. \t\t\t\tYou don’t need the rest of the columns. \t\t\t\tHere \t\t\t\tis an example for my HP IPAQ:
\nipaq 0x0003 0x049f 0x505a 0x0000 0x0000 0x00 0x00 0x00 0x00 0x00 0x00 0x00000005
\nThis has to be ONE single line.<\/p>\n

Now that hotplug knows which script to invoke, you can write the script itself. \t\t\t\tVisit \/etc\/hotplug\/usb.agent for a description of preset variables. Here is an \t\t\t\texample script, setting up IP-Masquerading for my IPAQ:<\/p>\n

#!\/bin\/bash<\/p>\n

#This is the IPAQ Organizer. We want IP-Masquerading
\n#Bring up the interface (We assume the standard Opie usb IP)
\nifconfig usb0 192.168.0.200 netmask 255.255.255.0 pointopoint 192.168.0.202 up
\n#Write the route to the IPAQ into the routing table
\nroute add -host 192.168.0.202 usb0 > \/dev\/null
\n#Now set up IP-Masquerading
\niptables -t nat -I POSTROUTING -j MASQUERADE -s 192.168.0.202\/16
\niptables -I FORWARD -s 192.168.0.202\/16 -j ACCEPT
\niptables -I FORWARD -d 192.168.0.202\/16 -j ACCEPT
\n#And active it
\necho 1 > \/proc\/sys\/net\/ipv4\/ip_forward
\n#set the remover script
\n:> $REMOVER
\n#Remove all the iptables entries we’ve created
\necho “iptables -t nat -D POSTROUTING -j MASQUERADE -s 192.168.0.202\/16” >> $REMOVER
\necho “iptables -D FORWARD -s 192.168.0.202\/16 -j ACCEPT” >> $REMOVER
\necho “iptables -D FORWARD -d 192.168.0.202\/16 -j ACCEPT” >> $REMOVER
\nchmod +x $REMOVER<\/p><\/blockquote>\n

Very important are the line down from “:> $REMOVER”. The REMOVER variable is your \t\t\t\tscript which is called on removing the device.<\/p>\n

Ok, thats it, you have your mapping from the device to the script, you have your \t\t\t\tscript itself and have set up a REMOVER script as well.<\/p>\n

Have fun!<\/p>\n","protected":false},"excerpt":{"rendered":"

Instructions how to configure hotplugging to execute a specific script on adding\/removing a device The first thing you have to do is to get hotplugging working in general. Visit Linux Hotplugging to learn how to do that. You should have a file named usb.usermap in your \/etc\/hotplug\/ directory. This file handles to scripts for particular … Continue reading Custom hotplugging scripts<\/span> →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":35,"menu_order":0,"comment_status":"open","ping_status":"open","template":"","meta":[],"_links":{"self":[{"href":"https:\/\/www.hackenberger.at\/blog\/wp-json\/wp\/v2\/pages\/40"}],"collection":[{"href":"https:\/\/www.hackenberger.at\/blog\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.hackenberger.at\/blog\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.hackenberger.at\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.hackenberger.at\/blog\/wp-json\/wp\/v2\/comments?post=40"}],"version-history":[{"count":0,"href":"https:\/\/www.hackenberger.at\/blog\/wp-json\/wp\/v2\/pages\/40\/revisions"}],"up":[{"embeddable":true,"href":"https:\/\/www.hackenberger.at\/blog\/wp-json\/wp\/v2\/pages\/35"}],"wp:attachment":[{"href":"https:\/\/www.hackenberger.at\/blog\/wp-json\/wp\/v2\/media?parent=40"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}