Star King of the Grape Trees <[EMAIL PROTECTED]> said on Mon, 16 Jan 2006 10:47:03 +1100: > Ron Johnson wrote: > > >On Mon, 2006-01-16 at 08:40 +1100, Tim Connors wrote: > > > > > >><snip> > >> > >>Why on earth would you want to put ls in backticks? I wonder who > >>originated this rather redundant and fragile (what happens when a > >>filename has any form of whitespace?) construct? > >> > >> > That would be me.
Nope -- heaps of people have done this before you. Did you pick this technique up from someone else? It'd be nice if the technique would kindly stop propogating :) > >If you're dealing with so many files that the bash "glob buffer" > >fills up, `ls *.bmp` can work around that. I don't think there is a fixed limit glob buffer. Are you sure you are not confusing this with the amount of space bash is allowed to allocate for arguments for spawned commands -- a kernel limit? So saying: for a in * ; do blah "$a" done has no limit, whereas blah2 * does have a limit (of about 20K characters, IIRC). (hmmm, maybe more on the 2.6 kernel -- I can't seem to generate that dreaded "Argument list too long" message except by doing something stupid like: ls -lA /var/spool/news/message.id/*/* ) > And imho, much easier than dealing with xargs and find -exec whatnot ; > Also, if spaces are a problem, fancy quotes can deal with that: > for f in `ls *.bmp`; do echo "$f"; done <-- Note I have NOT tested this. Nope. #mkdir tmp #cd tmp #for i in `seq 1 10000` ; do touch "blah $i" ; done #for f in `ls *`; do ls -lA "$f"; done ls: blah: No such file or directory ls: 1: No such file or directory ls: blah: No such file or directory ls: 10: No such file or directory ls: blah: No such file or directory ls: 100: No such file or directory ls: blah: No such file or directory ls: 1000: No such file or directory ls: blah: No such file or directory .... Because each space output by the backticks causes the for loop to plop the next bit into a new loop. -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
