Pseudo File Systems

Pseudo file system types are logical groupings of files that reside in disk-based systems. The TFS pseudo file system is not included in the SunOS release 5.7 software.

The SunOS release 5.7 pseudo file systems are:

• CACHEFS pseudo file system - can be used to improve performance of slow devices such as a CD-ROM drive.

• PROCFS pseudo file system - resides in memory and contains a list of active processes, by process number, in the /proc directory. See the proc(4) man page.

• FDFS pseudo file system - provides explicit names for opening files using file descriptors.

• FIFOFS pseudo file system - contains pipe files that give processes common access to data.

• NAMEFS pseudo file system - used mostly by STREAMS for dynamic mounts of file descriptors on top of files.

• SWAPFS pseudo file system - the default swap device when the system boots, or you create additional swap space.