This program is part of Netpbm.
pgmtofs reads a PGM image as input and produces Usenix FaceSaver(tm) format as output.
FaceSaver is a registered trademark of Metron Computerware Ltd. of Oakland, CA.
There are no command line options defined specifically for pgmtofs, but it recognizes the options common to all programs based on libnetpbm (See Common Options.)