Pamfile User Manual(0) Pamfile User Manual(0)
pamfile - describe a Netpbm (PAM or PNM) file
This program is part of Netpbm(1).
pamfile reads one or more Netpbm files as input and writes out short
descriptions of the image type, size, etc. This is partly for use in
shell scripts, so the format is not particularly pretty.
By default, pamfile reads only the header of the input file. If that
file is a pipe, that might cause problems for the process that is feed-
ing the pipe. In that case, see the -allimages option.
This option causes pamfile to describe every image in each input
file. Without this option, pamfile describes only the first
image in each input file.
This option also causes pamfile to read all the images from the
input stream, whereas without it, pamfile reads only the header
of the first one. If the input stream is from a pipe, the pro-
cess that is feeding the pipe might require the entire stream to
be consumed. In that case, use this option even if the stream
contains only one image.
This option has no effect if you also specify -count.
Note that before July 2000, a file could not contain more than
one image and many programs ignore all but the first.
This option was new in Netpbm 9.5 (July 2000).
-count This option causes pamfile to display only a count of how many
images are in each input file.
As with -allimages, this causes pamfile to read all the images.
This option was new with Netpbm 10.31 (December 2005).
pam(1), ppmhist(1), file
Copyright (C) 1991 by Jef Poskanzer.
netpbm documentation 23 October 2005 Pamfile User Manual(0)
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