Hello, I'm trying to write a bash script for a back up job. Unfortunately I'm not getting anywhere.
>I need to mount a file system only if the filesystem is >_not_ already mounted. > >I'm thinking of it like this: Ok, I've been reading documentation and wrote a test script. I've so far managed to make it like this: #!/bin/bash if [ -n `mount |grep "/mnt/root/cschomeserver/e"` ] #if it's already mounted don't mount it then PREMOUNTED='YES' && echo "is mounted" #If it's already mounted set a var else echo "mount /mnt/root/cschomeserver/e is not mounted" #if it's not mounted, mount it. fi echo $PREMOUNTED Unfortunately it seems that -n is exactly the opposite of what I need because the output is backwards. Additionally, it was working backwards but without error a minute ago and now it's giving that "too many arguments" thing - I'm not sure what's changed, I tried undoing my (very small) edits to the file and it's still erroring even after the un-do so I'm not sure what happened. When it really is mounted I get the following output from that script: fluorite:~ # ./test.sh ./test.sh: [: too many arguments mount /mnt/root/cschomeserver/e is not mounted Which is backwards - it is mounted. As you can see PREMOUNTED doesn't get set either - again, that's backwards. Then when it really isn't mounted the script _does_ set the var: fluorite:~ # umount /mnt/root/cschomeserver/e/ fluorite:~ # ./test.sh YES So, can someone tell me what the opposite of -n is? According to the man page it's -z but that's acting the same as -n (weird) I can't figure it out. I've tried -n, -z and a host of other options I see in the man page and none of it's working and it's backwards both ways. Also can anyone explain the "too many arguments" part - are you not allowed to run a command inside [] for output? I'm also testing it with the interactive shell, such as the following variation: fluorite:~ # if test -n $( `mount |grep "/mnt/root/cschomeserver/e"` ) ; then PREMOUNTED="YES" && echo $PREMOUNTED ; else echo "no" ; fi YES Unfortunately this (and test -z) is always returning "YES" so something's still quite wrong. Obviously I do not understand how to properly get a yes/no value out of the string returned from a nested command. If someone could explain even that much I'd appreciate it. TIA ---------------------------------------------------- Jonathan Wilson System Administrator Cedar Creek Software http://www.cedarcreeksoftware.com Central Texas IT http://www.centraltexasit.com _______________________________________________ Redhat-list mailing list [EMAIL PROTECTED] https://listman.redhat.com/mailman/listinfo/redhat-list