This program is part of Netpbm.
pnmtosir reads a PNM image as input and produces a Solitaire Image Recorder format image.
pnmtosir produces an MGI TYPE 17 file for PBM and PGM files. For PPM, it writes a MGI TYPE 11 file.
There are no command line options defined specifically for pnmtosir, but it recognizes the options common to all programs based on libnetpbm (See Common Options.)