userland/libc/fcntl/fcntl.c


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#include <fcntl.h>
#include <stdarg.h>
#include <syscall.h>

int fcntl(int fd, int cmd, ...) {
  int arg = 0;

  if ((F_GETFL == cmd) || (F_SETFL == cmd)) {
    va_list ap;
    va_start(ap, cmd);
    arg = va_arg(ap, int);
    va_end(ap);
  }
  RC_ERRNO(syscall(SYS_FCNTL, fd, cmd, arg, 0, 0));
}