On 12 Jan 2012 at 14:02:50, Dean S. Messing wrote: > > In a system script I find this snippet > > nodevs=$(< /proc/filesystems fgrep rootfs) > > and don't understand the syntax. According to the bash man page, > > $(< file) is shorthand for $(cat file). But then the above should read > > nodevs=$(< /proc/filesystems | fgrep rootfs) > > However, the latter leaves $nodevs empty whereas the former puts the > stuff that fgrep processes into nodevs as it should. The command < /proc/filesystems fgrep rootfs redirects the input from the file /proc/filesystems into the command "fgrep rootfs". You could rewrite this as fgrep rootfs < /proc/filesystems nodevs=$( command ) takes the result of the command inside the parentheses and assigns into the variable nodevs. Anthony. -- users mailing list users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines Have a question? Ask away: http://ask.fedoraproject.org
