egghelp/eggheads community

Non I/O Blocking exec replacement ?

2003-09-05T08:43:26-04:00

is it possible to use open the way i just told ?

Yes. By using 'fconfigure' to make it non-blocking and 'fileevent readable' to set up the callback. The only thing that is a bit tricky is redirection of stderr...i'll get back to you on this...try this code:

Code:

proc myexec {cmd callback} {set f [open |$cmd r+]fconfigure $f -blocking 0fileevent $f readable [list myexecIn $f $callback]set f}proc myexecIn {f callback} {if {[set i [gets $f line]]>0} {uplevel #0 [concat $callback [list $line]]} elseif {$i==-1} {close $fuplevel #0 [concat $callback {{}}]}}

The callback command will be called for each line of output. Blank lines are ignored and when the process ends the callback command is called with a blank argument - like a dcc connection put under control under eggdrop. (the callback can be a list of command+arguments just like the built in callbacks.) This code is by no means final, but it's something to start with

Statistics: Posted by user — Fri Sep 05, 2003 8:43 am

Non I/O Blocking exec replacement ?

2003-09-05T08:29:59-04:00

why not open |?

is it possible to use open the way i just told ? (seriouse question, i really dont know)

Statistics: Posted by GodOfSuicide — Fri Sep 05, 2003 8:29 am

Non I/O Blocking exec replacement ?

2003-09-05T07:13:16-04:00

why not open |?

Statistics: Posted by user — Fri Sep 05, 2003 7:13 am

Non I/O Blocking exec replacement ?

2003-09-05T06:48:19-04:00

Is there some module out there that replaces the exec cmd with a non blocking one ? (no, i dont mean bgexec or open) ?

like for example
set outfile [myexec "ping $host" ping_get]
and each time this exec sends a new line -> it gets sent to ping_get

maybe one of the coders in here can realize this idea..my own C / C++ skills are too low for this

Statistics: Posted by GodOfSuicide — Fri Sep 05, 2003 6:48 am