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Top Forums Programming Unix Shell background processing Post 302456935 by Mercfh on Monday 27th of September 2010 01:49:26 AM
Old 09-27-2010
Unix Shell background processing

So I made my own unix shell, but i want to make a background process when using the & appended to the end, so far most of the commands seem to work (except cd, but thats another story)
right now here is what I have got.

Im thinking maybe I shouldn't be using switch and maybe switch it to something else, and Im also unsure of how to actually CHECK to see if theirs an &, because im not sure if my parsearg function will do the trick

thanks

Last edited by Mercfh; 09-28-2010 at 06:54 PM..
 

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VDE_PLUG2TAP(1) 					      General Commands Manual						   VDE_PLUG2TAP(1)

NAME
vde_plug2tap - Virtual Distributed Ethernet plug-to-tap SYNOPSIS
vde_plug2tap [OPTION]... tap_name DESCRIPTION
vde_plug2tap is a plug to be connected into a VDE switch. All the data that is catched by the plug is sent to the tap interface tap_name and everything from that interface is injected in the switch. Example: vde_plug2tap tap4 connects the default switch (/var/run/vde.ctl) to the tap4 interface. OPTIONS
-p, --port=portnum It is possible to decide which port of the switch to use. When this option is not specified the switch assigns the first available unused port (if any). It is possible to connect several cables in the same switch port: in this way all this cables work concur- rently. It means that packet can result as duplicate but no ARP table loops are generated. Is useful when vde is used for mobil- ity. Several physical interfaces can be used at a time during handoffs to prevent hichups in connectivity. -g, --group=group group ownership of the communication socket. For security when more want to share a switch it is better to use a unix group to own the comm sockets so that the network traffic cannot be sniffed. -m, --mod=octal-mode octal chmod like permissions for the comm sockets -s, --sock=socket specify the UNIX socket to be used by local programs for joining the VDE. The default value is "/var/run/vde.ctl". When '-' is used in place of the VDE switch directory, vde_plug2tap works as a plug (see vde_plug(1)). The command: dpipe vde_plug = ssh remote.machine.org vde_plug2tap -s - tapx connects the default local switch to a remote tapx interface. -d, --daemon start vde_plug2tap as a background process -P, --pidfile=pidfile put the process ID of vde_plug2tap in pidfile. Can be used with --daemon to store the PID for future killing. -h, --help show a brief help NOTICE
Virtual Distributed Ethernet is not related in any way with www.vde.com ("Verband der Elektrotechnik, Elektronik und Informationstechnik" i.e. the German "Association for Electrical, Electronic & Information Technologies"). SEE ALSO
vde_switch(1), vde_plug(1), vdeq(1), dpipe(1). AUTHOR
VDE is a project by Renzo Davoli <renzo@cs.unibo.it> Virtual Distributed Ethernet December 5, 2006 VDE_PLUG2TAP(1)
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