libc-bottom-half/sources/socket.c

   1 #include <errno.h>
   2 #include <fcntl.h>
   3 #include <assert.h>
   4 #include <sys/socket.h>
   5
   6 static_assert((SOCK_DGRAM & ~SOCK_NONBLOCK & ~SOCK_CLOEXEC) == SOCK_DGRAM,
   7               "Socket type flags clash");
   8 static_assert((SOCK_STREAM & ~SOCK_NONBLOCK & ~SOCK_CLOEXEC) == SOCK_STREAM,
   9               "Socket type flags clash");
  10
  11 static int socketcall(int domain, int type, int protocol) {
  12     // FIXME: Implement socket by looking up pre-opened network sockets.
  13     errno = ENOSYS;
  14     return -1;
  15 }
  16
  17 int socket(int domain, int type, int protocol)
  18 {
  19     int s = socketcall(domain, type & ~SOCK_CLOEXEC & ~SOCK_NONBLOCK, protocol);
  20     if (s < 0) return s;
  21     if (type & SOCK_CLOEXEC)  fcntl(s, F_SETFD, FD_CLOEXEC);
  22     if (type & SOCK_NONBLOCK) fcntl(s, F_SETFL, O_NONBLOCK);
  23     return s;
  24 }