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/* ISC license. */
#undef _POSIX_C_SOURCE
#undef _XOPEN_SOURCE
#ifndef _XPG4_2
#define _XPG4_2
#endif
#ifndef _GNU_SOURCE
#define _GNU_SOURCE
#endif
#ifndef _DEFAULT_SOURCE
#define _DEFAULT_SOURCE
#endif
#include <sys/socket.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>
int main (void)
{
struct sockaddr blah ;
socklen_t blahlen = sizeof(blah) ;
int fd = open("/dev/null", O_RDONLY | O_NONBLOCK) ;
if (fd < 0) return 111 ;
if ((accept4(fd, &blah, &blahlen, SOCK_NONBLOCK) < 0) && (errno != ENOTSOCK)) return 1 ;
return 0 ;
}
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