src/network/accept4.c

   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
   8 int 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 }