pnmindex version (return code: 0)
cp: omitting directory 'version'
pnmfile: /tmp/pi.jfpAAzbT/pi.tmp - No such file or directory
/usr/bin/pnmindex: line 123: [: -gt: unary operator expected
/usr/bin/pnmindex: line 124: [: -gt: unary operator expected
pnmcat: /tmp/pi.jfpAAzbT/pi.tmp - No such file or directory
pnmcat: EOF / read error reading magic number
pnmindex --help (return code: 1)
usage: /usr/bin/pnmindex [-size N] [-across N] [-colors N] [-black] pnmfile ...