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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 3.3//EN">
<html> <head>
<title>Netpbm subroutine library: pm_make_tmpfile_fd() function</title>
<meta name="manual_section" content="3">
</head>
<body>
<h1>pm_make_tmpfile_fd()</h1>
Updated: 31 December 2007
<br>
<h2>NAME</h2>
pm_make_tmpfile_fd() - create a temporary named file
<h2>SYNOPSIS</h2>
<pre>
#include <netpbm/pm.h>
pm_make_tmpfile(int * fdP,
const char ** filenameP);
</pre>
<h2>EXAMPLE</h2>
<p>This simple example creates a temporary file, writes "hello
world" to it, then writes some search patterns to it, then uses
it as input to <b>grep</b>:
<pre>
#include <netpbm/pm.h>
int fd;
const char * myfilename;
pm_make_tmpfile_fd(&fdP, &myfilename);
write(fd, "^account:\\s.*\n", 16);
fprintf(fd, "^name:\\s.*\n", 13);
close(fd);
asprintfN(&grepCommand, "grep --file='%s' /tmp/infile >/tmp/outfile");
system(grepCommand);
strfree(grepCommand);
unlink(myfilename);
strfree(myfilename);
</pre>
<h2>DESCRIPTION</h2>
<p>This library function is part of <a href="index.html">Netpbm</a>.
<p><b>pm_make_tmpfile_fd()</b> is analogous to <a
href="libmaketmpfile.html"><b>pm_make_tmpfile()</b></a>. The only
difference is that it opens the file as a low level file, as
<b>open()</b> would, rather than as a stream, as <b>fopen()</b> would.
<p>If you don't need to access the file by name, use
<b>pm_tmpfile_fd()</b> instead, because it's cleaner. With
<b>pm_tmpfile_fd()</b>, the operating system always deletes the
temporary file when your program exits, if the program failed to clean
up after itself.
<h2>HISTORY</h2>
<p><b>pm_tmpfile()</b> was introduced in Netpbm 10.42 (March 2008).
</body>
</html>
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