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| author | giraffedata <giraffedata@9d0c8265-081b-0410-96cb-a4ca84ce46f8> | 2011-08-12 02:54:34 +0000 |
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| committer | giraffedata <giraffedata@9d0c8265-081b-0410-96cb-a4ca84ce46f8> | 2011-08-12 02:54:34 +0000 |
| commit | aebebe8e665aea4d1c4f9a9ad870e833537a6ffb (patch) | |
| tree | ec39406e055c477c1219a874a7745d41df0cdb23 /pamexec.html | |
| parent | 5a91a8606fa8ebafe152eff102a45ce68a4006eb (diff) | |
| download | netpbm-mirror-aebebe8e665aea4d1c4f9a9ad870e833537a6ffb.tar.gz netpbm-mirror-aebebe8e665aea4d1c4f9a9ad870e833537a6ffb.tar.xz netpbm-mirror-aebebe8e665aea4d1c4f9a9ad870e833537a6ffb.zip | |
miscellaneous update
git-svn-id: http://svn.code.sf.net/p/netpbm/code/userguide@1535 9d0c8265-081b-0410-96cb-a4ca84ce46f8
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| -rw-r--r-- | pamexec.html | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/pamexec.html b/pamexec.html new file mode 100644 index 00000000..76acb7ed --- /dev/null +++ b/pamexec.html @@ -0,0 +1,115 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 3.2//EN"> +<HTML><HEAD><TITLE>Pamexec User Manual</TITLE></HEAD> +<BODY> +<H1>pamexec</H1> +Updated: 11 August 2011 +<BR> +<A HREF="#index">Table Of Contents</A> + +<H2>NAME</H2> + +pamexec - Execute a shell command on each image in a Netpbm image stream + +<H2 id="synopsis">SYNOPSIS</H2> + +<B>pamexec</B> + +["<i>command</i>"] + +[<I>netpbmfile</I> + +[<b>-check</b>] + +<p>Minimum unique abbreviation of option is acceptable. You may use double +hyphens instead of single hyphen to denote options. You may use white +space in place of the equals sign to separate an option name from its value. + + +<H2 id="description">DESCRIPTION</H2> + +<p>This program is part of <a href="index.html">Netpbm</a>. + +<p><b>pamexec</b> reads a Netpbm image stream as input. For each image, it +runs a specified shell command and supplies the image to it as Standard +Input (with a pipe). + +<P><I>netpbmfile</I> is the file name of the input file, or +<B>-</B> to indicate Standard Input. The default is Standard Input. + +<p>Many Netpbm programs understand multimage Netpbm streams themselves, +so you don't need to use <b>pamexec</b> to run the program on the images +in the stream. Ideally, all Netpbm programs would have that capability, +but multi-image streams are a relatively recent invention, so older Netpbm +programs just process the first image in the stream and then stop. Even +recently written Netpbm programs work that way, since the authors aren't +aware of the multi-image possibility. + +<p>Another way to process a multi-image stream is to use <b>pamsplit</b> to +explode it into multiple files, one image per file. You can then process +those files. + +<p>To run your command on a subset of the images in the stream, use +<b>pampick</b> to select the desired images from the input stream and pipe +the result to <b>pamexec</b>. + + +<h2 id="options">OPTIONS</h2> + +<dl> +<dt><b>-check</b> + +<dd>This causes <b>pamexec</b> to exit without processing any further images +if the command has a nonzero exit status. + +</dl> + +<h2 id="applications">APPLICATIONS</h2> + +To make an animated GIF movie: + +<kbd> +<pre> + pamexec pamtogif myvideo.ppm | gifsicle >myvideo.gif +</pre> +</kbd> + +<h2 id="limitations">LIMITATIONS</h2> + +<p><b>pamexec</b> assumes all commands consume all of Standard Input. +If yours doesn't (perhaps it just exits when it's seen enough), +you can buffer through a temporary file like this: + +<kbd> +<pre> + pamexec "cat >/tmp/x; head -3 x" myvideo.ppm +</pre> +</kbd> + +<h2 id="history">HISTORY</h2> + +<p><b>pamexec</b> was new in Netpbm 10.56 (September 2011). + +<p>Michael Pot wrote it, borrowing from <b>pamsplit</b>. + + +<H2 id="seealso">SEE ALSO</H2> + +<B><A HREF="pamfile.html">pamfile</A></B>, +<B><A HREF="pampick.html">pampick</A></B>, +<B><A HREF="pamsplit.html">pampick</A></B>, +<B><A HREF="pnm.html">pnm</A></B>, +<B><A HREF="pam.html">pam</A></B>, +<B>cat</b> man page + +<HR> +<H2 id="index">Table Of Contents</H2> +<UL> +<LI><A HREF="#synopsis">SYNOPSIS</A> +<LI><A HREF="#description">DESCRIPTION</A> +<LI><A HREF="#options">OPTIONS</A> +<LI><A HREF="#applications">APPLICATIONS</A> +<LI><A HREF="#limitations">LIMITATIONS</A> +<LI><A HREF="#seealso">SEE ALSO</A> +</UL> +</BODY> +</HTML> |