Skip to main content

Browse the archive

Staging
v0.5.1
https://github.com/python/cpython
09 December 2020, 11:06:31 UTC
Revision b63a620014b67a6e63d10783149c41baaf59def8 authored by Matěj Cepl on 07 December 2020, 20:05:13 UTC, committed by GitHub on 07 December 2020, 20:05:13 UTC 
bpo-42579: Make workaround for various versions of Sphinx more robust (GH-23662)
 
The solution in gh#python/cpython#13236 is too strict because it
effectively requires the use of Sphinx >= 2.0. It is not too difficult to
make the same solution more robust so it works with all normal versions
of Sphinx.
1 parent c0afb7f
Raw File
Tip revision: b63a620014b67a6e63d10783149c41baaf59def8 authored by Matěj Cepl on 07 December 2020, 20:05:13 UTC
bpo-42579: Make workaround for various versions of Sphinx more robust (GH-23662)
Tip revision: b63a620
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>
#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;
}
back to top