CODEWITHSUNDEEP
bashshell
t0mmyt
t0mmyt

Reputation: 513

How to stop bash evaluating a string

I have the following block in a script to verify whether a mount point is tmpfs

if [ "$(stat -f -c '%T' $LOGDIR)" -ne 'tmpfs' ]
then
    echo "Log directory ($LOGDIR) must be tmpfs"
    exit 1
fi

The problem is that if the filesystem is returned as ext2/ext3 then the shell attempts to evaluate that and falls over with a division by zero. How can I force it to be treated as a regular string?

Upvotes: 0

Views: 368

Answers (2)

chepner
chepner

Reputation: 530960

Use != for string comparison; -ne is for integer comparison only. (Actually, I'm surprised it tried to do arithmetic using "ext2/ext3", as opposed to simply treating the entire string as a zero value.)

Upvotes: 2

choroba
choroba

Reputation: 241808

Do not use the -ne arithmetic operator, use the string operator !=.

BTW, what version of bash are you running? I am getting integer expression expected.

Upvotes: 2

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