Skip to main content

Browse the archive

Staging
v0.8.1
https://github.com/python/cpython
09 December 2020, 11:06:31 UTC
Revision 3235fac0d7d94ad6464a162261c18a424829d2e5 authored by Miss Islington (bot) on 11 September 2018, 16:07:11 UTC, committed by Ned Deily on 11 September 2018, 16:07:11 UTC 
bpo-34405: Update to OpenSSL 1.1.0i for macOS installer builds (GH-9166) (GH-9167)
 
(cherry picked from commit 3102e24d83315eee42a94c460956fbcb92ac510f)

Co-authored-by: Ned Deily <nad@python.org>
1 parent c9ece5f
Raw File
Tip revision: 3235fac0d7d94ad6464a162261c18a424829d2e5 authored by Miss Islington (bot) on 11 September 2018, 16:07:11 UTC
bpo-34405: Update to OpenSSL 1.1.0i for macOS installer builds (GH-9166) (GH-9167)
Tip revision: 3235fac
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