Verify CUPS print queue file system type when mounted via C program code as tmpfs.
I have a Linux network server coded in C to use CUPS. It creates the print queue (/var/spool/cups) as a tmpfs. However, when I am running, I want to verify the print queue was mounted as a RAM-based file system (tmpfs). I am logged in as root. When I use 'df -T' or 'mount -t tmpfs', I am not seeing /var/spool/cups listed at all.
How can I verify that it was mounted correctly as a tmpfs?