/*
 * Public domain dup2() lookalike
 * by Curtis Jackson @ AT&T Technologies, Burlington, NC
 * electronic address:  burl!rcj
 *
 * dup2 performs the following functions:
 *
 * Check to make sure that fd1 is a valid open file descriptor.
 * Check to see if fd2 is already open; if so, close it.
 * Duplicate fd1 onto fd2; checking to make sure fd2 is a valid fd.
 * Return fd2 if all went well; return BADEXIT otherwise.
 */

#include <fcntl.h>
#include <unistd.h>

#define BADEXIT -1

int
dup2(int fd1, int fd2)
{
	if (fd1 != fd2) {
		if (fcntl(fd1, F_GETFL) < 0)
			return BADEXIT;
		if (fcntl(fd2, F_GETFL) >= 0)
			close(fd2);
		if (fcntl(fd1, F_DUPFD, fd2) < 0)
			return BADEXIT;
	}
	return fd2;
}
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<table class='tabs'><tr><td>
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<div class='content'><div class='cgit-panel'><b>diff options</b><form method='get' action='.'><input type='hidden' name='h' value='feature/vfd_swmr'/><input type='hidden' name='id' value='9f60f016ab71cf8ce39c859fd9eb61c6fca35d63'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Quincey Koziol &lt;koziol@hdfgroup.org&gt;</td><td class='right'>2008-10-07 04:17:35 (GMT)</td></tr>
<tr><th>committer</th><td>Quincey Koziol &lt;koziol@hdfgroup.org&gt;</td><td class='right'>2008-10-07 04:17:35 (GMT)</td></tr>
<tr><th>commit</th><td colspan='2' class='sha1'><a href='/oss-git/hdf5.git/commit/?h=feature/vfd_swmr&amp;id=9f60f016ab71cf8ce39c859fd9eb61c6fca35d63'>9f60f016ab71cf8ce39c859fd9eb61c6fca35d63</a> (<a href='/oss-git/hdf5.git/patch/?id=9f60f016ab71cf8ce39c859fd9eb61c6fca35d63'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='sha1'><a href='/oss-git/hdf5.git/tree/?h=feature/vfd_swmr&amp;id=9f60f016ab71cf8ce39c859fd9eb61c6fca35d63'>0ddbcb2f8707b578af22c62748420b9e3c19177b</a></td></tr>
<tr><th>parent</th><td colspan='2' class='sha1'><a href='/oss-git/hdf5.git/commit/?h=feature/vfd_swmr&amp;id=504c67846e6a4cc5706403bf21a9ae4f07aae7b4'>504c67846e6a4cc5706403bf21a9ae4f07aae7b4</a> (<a href='/oss-git/hdf5.git/diff/?h=feature/vfd_swmr&amp;id=9f60f016ab71cf8ce39c859fd9eb61c6fca35d63&amp;id2=504c67846e6a4cc5706403bf21a9ae4f07aae7b4'>diff</a>)</td></tr><tr><th>download</th><td colspan='2' class='sha1'><a href='/oss-git/hdf5.git/snapshot/hdf5-9f60f016ab71cf8ce39c859fd9eb61c6fca35d63.zip'>hdf5-9f60f016ab71cf8ce39c859fd9eb61c6fca35d63.zip</a><br/><a href='/oss-git/hdf5.git/snapshot/hdf5-9f60f016ab71cf8ce39c859fd9eb61c6fca35d63.tar.gz'>hdf5-9f60f016ab71cf8ce39c859fd9eb61c6fca35d63.tar.gz</a><br/><a href='/oss-git/hdf5.git/snapshot/hdf5-9f60f016ab71cf8ce39c859fd9eb61c6fca35d63.tar.bz2'>hdf5-9f60f016ab71cf8ce39c859fd9eb61c6fca35d63.tar.bz2</a><br/></td></tr></table>
<div class='commit-subject'>[svn-r15800] Description:<span class='decoration'></span></div><div class='commit-msg'>	Bring file free space branch changes through r15795 into trunk, which
includes a fair bit of code cleanup &amp; rearrangement along with a couple of
bug fixes also.

Tested on:
        Mac OS X/32 10.5.5 (amazon) in debug mode
        Mac OS X/32 10.5.5 (amazon) w/C++ &amp; FORTRAN, w/threadsafe,
                                in production mode
        FreeBSD/32 6.3 (duty) in debug mode
        FreeBSD/64 6.3 (liberty) w/C++ &amp; FORTRAN, in debug mode
        Linux/32 2.6 (kagiso) w/PGI compilers, w/C++ &amp; FORTRAN, w/threadsafe,
                                in debug mode
        Linux/64-amd64 2.6 (smirom) w/Intel compilers w/default API=1.6.x,
                                w/C++ &amp; FORTRAN, in production mode
        Solaris/32 2.10 (linew) w/deprecated symbols disabled, w/C++ &amp; FORTRAN,
                                w/szip filter, in production mode
        Linux/64-ia64 2.6 (cobalt) w/Intel compilers, w/C++ &amp; FORTRAN,
                                in production mode
        Linux/64-ia64 2.4 (tg-login3) w/parallel, w/FORTRAN, in production mode
        Linux/64-amd64 2.6 (abe) w/parallel, w/FORTRAN, in production mode
</div><div class='diffstat-header'><a href='/oss-git/hdf5.git/diff/?h=feature/vfd_swmr&amp;id=9f60f016ab71cf8ce39c859fd9eb61c6fca35d63'>Diffstat</a></div><table summary='diffstat' class='diffstat'>