libc-bottom-half/cloudlibc/src/libc/sys/socket/shutdown.c

   1 // Copyright (c) 2015-2016 Nuxi, https://nuxi.nl/
   2 //
   3 // SPDX-License-Identifier: BSD-2-Clause
   4
   5 #include <common/errno.h>
   6
   7 #include <sys/socket.h>
   8
   9 #include <assert.h>
  10 #include <wasi/api.h>
  11 #include <errno.h>
  12
  13 #ifdef __wasilibc_unmodified_upstream // generated constant names
  14 static_assert(SHUT_RD == __WASI_SHUT_RD, "Value mismatch");
  15 static_assert(SHUT_WR == __WASI_SHUT_WR, "Value mismatch");
  16 #else
  17 static_assert(SHUT_RD == __WASI_SDFLAGS_RD, "Value mismatch");
  18 static_assert(SHUT_WR == __WASI_SDFLAGS_WR, "Value mismatch");
  19 #endif
  20
  21 int shutdown(int socket, int how) {
  22   // Validate shutdown flags.
  23   if (how != SHUT_RD && how != SHUT_WR && how != SHUT_RDWR) {
  24     errno = EINVAL;
  25     return -1;
  26   }
  27
  28   __wasi_errno_t error = __wasi_sock_shutdown(socket, how);
  29   if (error != 0) {
  30     errno = errno_fixup_socket(socket, error);
  31     return -1;
  32   }
  33   return error;
  34 }