Writing data to virtual log devices

Arbitrary data is written to a virtual log device by opening the appropriate file in the /dev directory and writing data to the file. A virtual log can be opened by one process at a time.

For example:

To write messages to the virtual log devices by using the echo command, enter the following command:

	echo “Log Message” > /dev/vlog0

To store files to the virtual log devices by using the cat command, enter the following command:

cat /etc/passwd > /dev/vlog0

The maximum individual write size is limited to 32 KB, and programs that attempt to write more data in a single write operation receive an I/O (EIO) error. The command-line interface (CLI) utilities, such as the cat command, automatically break up the transfers into 32 KB write operations.