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| | #ifdef HAVE_ACCEPT4
# define A4_SOCK_CLOEXEC SOCK_CLOEXEC
# define A4_SOCK_NONBLOCK SOCK_NONBLOCK
#else
# ifndef _GNU_SOURCE
# define _GNU_SOURCE
# endif
# include <sys/types.h>
# include <sys/socket.h>
# ifndef SOCK_CLOEXEC
# if (FD_CLOEXEC == O_NONBLOCK)
# define A4_SOCK_CLOEXEC 1
# define A4_SOCK_NONBLOCK 2
# else
# define A4_SOCK_CLOEXEC FD_CLOEXEC
# define A4_SOCK_NONBLOCK O_NONBLOCK
# endif
# else
# define A4_SOCK_CLOEXEC SOCK_CLOEXEC
# define A4_SOCK_NONBLOCK SOCK_NONBLOCK
# endif
/* accept4() is currently a Linux-only goodie */
static int
accept4(int sockfd, struct sockaddr *addr, socklen_t *addrlen, int flags)
{
int fd = accept(sockfd, addr, addrlen);
if (fd >= 0) {
if ((flags & A4_SOCK_CLOEXEC) == A4_SOCK_CLOEXEC)
(void)fcntl(fd, F_SETFD, FD_CLOEXEC);
/*
* Some systems inherit O_NONBLOCK across accept().
* We also expect our users to use MSG_DONTWAIT under
* Linux, so fcntl() is completely unnecessary
* in most cases...
*/
if ((flags & A4_SOCK_NONBLOCK) == A4_SOCK_NONBLOCK) {
int fl = fcntl(fd, F_GETFL);
if ((fl & O_NONBLOCK) == 0)
(void)fcntl(fd, F_SETFL, fl | O_NONBLOCK);
}
/*
* nothing we can do about fcntl() errors in this wrapper
* function, let the user (Ruby) code figure it out
*/
errno = 0;
}
return fd;
}
#endif /* !HAVE_ACCEPT4 */
|