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Full Discussion: How to read a dynamically changing file
Top Forums Shell Programming and Scripting How to read a dynamically changing file Post 302623797 by kashif.live on Saturday 14th of April 2012 04:23:20 PM
Old 04-14-2012
How to read a dynamically changing file
I want to read a constantly changing file and do some operation on text found in that file.
Actually that is log file of linux system and whenever i find a matching string in that file i want to create a text file with timestamp. is it possible to read that file?

here is sample output of log file
Code:
Apr 14 16:03:38 localhost kernel: usb 1-2.1: new high speed USB device using uhci_hcd and address 9
Apr 14 16:03:38 localhost kernel: usb 1-2.1: New USB device found, idVendor=12d1, idProduct=1037
Apr 14 16:03:38 localhost kernel: usb 1-2.1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
Apr 14 16:03:38 localhost kernel: usb 1-2.1: Product: Ideos
Apr 14 16:03:38 localhost kernel: usb 1-2.1: Manufacturer: Huawei Incorporated

Apr 14 16:02:21 localhost kernel: usb 1-1: new full speed USB device using uhci_hcd and address 8
Apr 14 16:02:21 localhost kernel: usb 1-1: New USB device found, idVendor=0951, idProduct=1643
Apr 14 16:02:21 localhost kernel: usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
Apr 14 16:02:21 localhost kernel: usb 1-1: Product: DataTraveler G3
Apr 14 16:02:21 localhost kernel: usb 1-1: Manufacturer: Kingston

I want to create a file whenever "New USB device found" text is found in this file. create a file with timestamp in \usr\temp folder.
 

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