1#define _GNU_SOURCE 2#include <sys/socket.h> 3#include <errno.h> 4#include <fcntl.h> 5#include "syscall.h" 6#include "libc.h" 7 8int accept4(int fd, struct sockaddr *restrict addr, socklen_t *restrict len, int flg) 9{ 10 if (!flg) return accept(fd, addr, len); 11 int ret = socketcall_cp(accept4, fd, addr, len, flg, 0, 0); 12 if (ret>=0 || (errno != ENOSYS && errno != EINVAL)) return ret; 13 ret = accept(fd, addr, len); 14 if (ret<0) return ret; 15 if (flg & SOCK_CLOEXEC) 16 __syscall(SYS_fcntl, ret, F_SETFD, FD_CLOEXEC); 17 if (flg & SOCK_NONBLOCK) 18 __syscall(SYS_fcntl, ret, F_SETFL, O_NONBLOCK); 19 return ret; 20} 21