On Wed, 05 Mar 2008 12:16:02 -0800 Bob McGowan <[EMAIL PROTECTED]> wrote:
> Brian wrote: > > > > So can you explain exactly what the first < <( echo "$teststring" ) > > does exactly please? > > > In any case, I'd be interested in knowing where you found this > construct. > The bash man page seems to be one of the few that can be read a thousand times and /still/ find something new in it each time! The following extract is from 'man bash' ;-) ,although what it doesn't make clear is that <(list) is preceeded by '< ', which I guess is why it's often missed. <blockquote> Process Substitution Process substitution is supported on systems that support named pipes (FIFOs) or the /dev/fd method of naming open files. It takes the form of <(list) or >(list). The process list is run with its input or out- put connected to a FIFO or some file in /dev/fd. The name of this file is passed as an argument to the current command as the result of the expansion. If the >(list) form is used, writing to the file will pro- vide input for list. If the <(list) form is used, the file passed as an argument should be read to obtain the output of list. When available, process substitution is performed simultaneously with parameter and variable expansion, command substitution, and arithmetic expansion. </blockquote> Cheers Mark. -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]