syscalls/accept.c

   1 /*
   2  * SYSCALL_DEFINE3(accept, int, fd, struct sockaddr __user *, upeer_sockaddr, int __user *, upeer_addrlen)
   3  *
   4  * On success, these system calls return a nonnegative integer that is a descriptor for the accepted socket.
   5  * On error, -1 is returned, and errno is set appropriately.
   6  */
   7 #include "sanitise.h"
   8
   9 struct syscallentry syscall_accept = {
  10         .name = "accept",
  11         .num_args = 3,
  12         .arg1name = "fd",
  13         .arg1type = ARG_FD,
  14         .arg2name = "upeer_sockaddr",
  15         .arg2type = ARG_SOCKADDR,
  16         .arg3name = "upeer_addrlen",
  17         .arg3type = ARG_SOCKADDRLEN,
  18         .rettype = RET_FD,
  19         .flags = NEED_ALARM,
  20 };
  21
  22
  23 /*
  24  * SYSCALL_DEFINE4(accept4, int, fd, struct sockaddr __user *, upeer_sockaddr,
  25          int __user *, upeer_addrlen, int, flags)
  26  *
  27  * On success, these system calls return a nonnegative integer that is a descriptor for the accepted socket.
  28  * On error, -1 is returned, and errno is set appropriately.
  29  *
  30  */
  31
  32 #define SOCK_CLOEXEC 02000000
  33 #define SOCK_NONBLOCK 04000
  34
  35 struct syscallentry syscall_accept4 = {
  36         .name = "accept4",
  37         .num_args = 4,
  38         .arg1name = "fd",
  39         .arg1type = ARG_FD,
  40         .arg2name = "upeer_sockaddr",
  41         .arg2type = ARG_SOCKADDR,
  42         .arg3name = "upeer_addrlen",
  43         .arg3type = ARG_SOCKADDRLEN,
  44         .arg4name = "flags",
  45         .arg4type = ARG_LIST,
  46         .arg4list = {
  47                 .num = 2,
  48                 .values = { SOCK_NONBLOCK, SOCK_CLOEXEC },
  49         },
  50         .rettype = RET_FD,
  51         .flags = NEED_ALARM,
  52 };