Skip to main content

Browse the archive

Staging
v0.5.1
https://github.com/python/cpython
09 December 2020, 11:06:31 UTC
Revision b50eff65906f8e9b4597cb0128ea1729341346fc authored by Miss Islington (bot) on 13 September 2019, 09:44:04 UTC, committed by GitHub on 13 September 2019, 09:44:04 UTC 
bpo-37785: Fix xgettext warning in argparse (GH-15161)
 
(cherry picked from commit 42671aea2db6cbc54369617da0fd3545048e0a45)

Co-authored-by: Jakub Kulík <Kulikjak@gmail.com>
1 parent 6e0c066
Raw File
Tip revision: b50eff65906f8e9b4597cb0128ea1729341346fc authored by Miss Islington (bot) on 13 September 2019, 09:44:04 UTC
bpo-37785: Fix xgettext warning in argparse (GH-15161)
Tip revision: b50eff6
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