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v0.8.1
Revision c7d2d69d95b263ee5f83511bc6fbe53acdc24ea3 authored by Victor Stinner on 12 March 2020, 07:38:11 UTC, committed by GitHub on 12 March 2020, 07:38:11 UTC 
bpo-39884: Add method name in "bad call flags" error (GH-18944)
 
PyDescr_NewMethod() and PyCFunction_NewEx() now include the method
name in the SystemError "bad call flags" error message to ease debug.
1 parent 1dd3794
Raw File
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;
}
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