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I'm trying to get a variable from /var/log/messages when the string "Attached" appears in /var/log/messages.

I've got so far, and stuck:

 sudo stdbuf -o0 tail -f -n0 /var/log/messages | awk  '{if ($9 == "Attached") print$8}'

This gives the usb device dev id eg [sdc] when a USB device is plugged in. FRom here I plan to mount the device as exfat. I'm using Centos 7, which does not automount exfat. fuse-exfat and exfat-utils are installed.

Allen
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1 Answers1

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You are using 'tail -f' which will never terminate (it will wait for additional log messages). You probably want to 'grep' from the file, and pick the first (or last)

device=$(sudo cat /var/log/messages | awk  '{if ($9 == "Attached") print $8 ; exit}')

The 'exit' can be used to pick the first match.

dash-o
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