fusl/src/network/socket.c

#include <sys/socket.h>
#include <fcntl.h>
#include <errno.h>
#include "syscall.h"

int socket(int domain, int type, int protocol) {
  int s = syscall(SYS_socket, domain, type, protocol, 0, 0, 0);
  if (s < 0 && (errno == EINVAL || errno == EPROTONOSUPPORT) &&
      (type & (SOCK_CLOEXEC | SOCK_NONBLOCK))) {
    s = syscall(SYS_socket, domain, type & ~(SOCK_CLOEXEC | SOCK_NONBLOCK),
                protocol, 0, 0, 0);
    if (s < 0)
      return s;
    if (type & SOCK_CLOEXEC)
      __syscall(SYS_fcntl, s, F_SETFD, FD_CLOEXEC);
    if (type & SOCK_NONBLOCK)
      __syscall(SYS_fcntl, s, F_SETFL, O_NONBLOCK);
  }
  return s;
}