1 #define _GNU_SOURCE
2 #include <sys/socket.h>
3 #include <errno.h>
4 #include <fcntl.h>
5 #include "syscall.h"
6
accept4(int fd,struct sockaddr * restrict addr,socklen_t * restrict len,int flg)7 int accept4(int fd, struct sockaddr *restrict addr, socklen_t *restrict len, int flg)
8 {
9 if (!flg) return accept(fd, addr, len);
10 int ret = socketcall_cp(accept4, fd, addr, len, flg, 0, 0);
11 if (ret>=0 || (errno != ENOSYS && errno != EINVAL)) return ret;
12 ret = accept(fd, addr, len);
13 if (ret<0) return ret;
14 if (flg & SOCK_CLOEXEC)
15 __syscall(SYS_fcntl, ret, F_SETFD, FD_CLOEXEC);
16 if (flg & SOCK_NONBLOCK)
17 __syscall(SYS_fcntl, ret, F_SETFL, O_NONBLOCK);
18 return ret;
19 }
20