Travis Crump <[EMAIL PROTECTED]> writes: > Drew Cohan wrote: >> Hi, >> Using a bash shell script (/bin/sh), I need to know how to check to see >> if certain files exist in a directory, as in, "Are there any jpegs in >> this directory?". I've tried various things (like using -s, -f with >> test and a do/for loop) but nothing seems to work right. The closest I >> can come is >> if test `ls /opt/images/*.jpg | wc -l` -gt 0 then ... >> Unfortunately, this gives me the error message "ls: /opt/images/*.jpg: >> No such file or directory" when there are no jpegs in /opt/images. >> So what am I missing here? >> > > From the there has got to be a better way department: > > ls /opt/images/*.jpg > /dev/null 2>&1 && echo there are jpegs
Here's one of several ways to do it in bash that won't involve forking a subprocess, in case you want to conserve system resources: shopt -s nullglob result=; for result in /opt/images/*.jpg; do break; done After this, the '$result' variable will be empty unless there are one or more files which match the pattern. -- Lloyd Zusman [EMAIL PROTECTED] -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
