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v0.5.1
https://github.com/python/cpython
09 December 2020, 11:06:31 UTC
Revision 38a5800cdca6ca11cd60ad07c520a512e88304de authored by Ezio Melotti on 02 August 2010, 03:14:27 UTC, committed by Ezio Melotti on 02 August 2010, 03:14:27 UTC 
Merged revisions 77871,77910,77913 via svnmerge from
 
svn+ssh://pythondev@svn.python.org/python/trunk

........
  r77871 | ezio.melotti | 2010-01-31 13:46:54 +0200 (Sun, 31 Jan 2010) | 1 line

  #7092: silence more -3 and -Wd warnings
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  r77910 | ezio.melotti | 2010-02-02 10:37:35 +0200 (Tue, 02 Feb 2010) | 1 line

  #7092: silence py3k warnings for bsddb. Patch by Florent Xicluna.
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  r77913 | ezio.melotti | 2010-02-02 19:34:37 +0200 (Tue, 02 Feb 2010) | 1 line

  #7092: Silence py3k warnings in test_exceptions and test_pep352. Patch by Florent Xicluna.
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1 parent 9c4fbdb
Raw File
Tip revision: 38a5800cdca6ca11cd60ad07c520a512e88304de authored by Ezio Melotti on 02 August 2010, 03:14:27 UTC
Merged revisions 77871,77910,77913 via svnmerge from
Tip revision: 38a5800
dup2.c 
/*
 * 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>

#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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