volname (1) - Linux Manuals
volname: return volume name
NAME
volname - return volume name
SYNOPSIS
volname [<device-file>]DESCRIPTION
Volname returns the volume name for a device formatted with an ISO-9660 file system, typically a CD-ROM. It also works with normal files that contain a ISO-9660 file system.
The file name can be specified on the command line. If omitted, it defaults to /dev/cdrom.