At 12:12 AM +0800 10/10/06, ???? wrote: >2006/10/9, Tony Nelson <tonynelson@xxxxxxxxxxxxxxxxx>: >> At 11:46 PM +0800 10/9/06, ???? wrote: >> >> >2006/10/9, Dan Track <dan.track@xxxxxxxxx>: >> >> Hi >> >> >> >> I've got a script that should check which rpms are installed on the >> >> system. Part of the script involves using file descriptors. I'm having >> >> trouble understanding these file descriptors and was hoping someone >> >> can clarify my mistake. As a simple script I wrote the following: >> >> >> >> #!/bin/bash >> >> $filename=$1 >> >> $filename1=$2 >> >> >> >> exec 9<&0 < $filename >> >> >The line in the script "exec 9<&0 <$filename" means "first copy fd0 to >> >fd9, then redirect file to fd0", so in the following lines of the >> >script fd9 is always the stdin. >> >> According to the Wikipedia link >> >> exec 9<$filename >> >> seems more likely. >"exec 9<$filename" means "redirect file to fd9, without dealing with fd0". Yes. Your point is? -- ____________________________________________________________________ TonyN.:' The Great Writ <mailto:tonynelson@xxxxxxxxxxxxxxxxx> ' is no more. <http://www.georgeanelson.com/>
