syscalls/accept4.c

   1 /*
   2  * SYSCALL_DEFINE4(accept4, int, fd, struct sockaddr __user *, upeer_sockaddr,
   3          int __user *, upeer_addrlen, int, flags)
   4  *
   5  * On success, these system calls return a nonnegative integer that is a descriptor for the accepted socket.
   6  * On error, -1 is returned, and errno is set appropriately.
   7  *
   8  */
   9
  10 #define SOCK_CLOEXEC 02000000
  11 #define SOCK_NONBLOCK 04000
  12
  13 #include "sanitise.h"
  14
  15 struct syscallentry syscall_accept4 = {
  16         .name = "accept4",
  17         .num_args = 4,
  18         .arg1name = "fd",
  19         .arg1type = ARG_FD,
  20         .arg2name = "upeer_sockaddr",
  21         .arg2type = ARG_SOCKADDR,
  22         .arg3name = "upeer_addrlen",
  23         .arg3type = ARG_SOCKADDRLEN,
  24         .arg4name = "flags",
  25         .arg4type = ARG_LIST,
  26         .arg4list = {
  27                 .num = 2,
  28                 .values = { SOCK_NONBLOCK, SOCK_CLOEXEC },
  29         },
  30         .rettype = RET_FD,
  31         .flags = NEED_ALARM,
  32 };