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#include <fs/types.h>
#include <fs/errno.h>
#include <fs/task.h>
#include <fs/util.h>
#include <fs/maccess.h>
#include <fs/fcntl.h>

#include "file.h"
#include "dentry.h"
#include "fs.h"

/*
  this are from bits/fcntl.h
  if they are changed then this code must be rewritten!  
  #define F_DUPFD               0
  #define F_GETFD               1
  #define F_SETFD               2
  #define F_GETFL               3
  #define F_SETFL               4
  #define F_GETLK               5
  #define F_SETLK               6
  #define F_SETLKW              7
 */

int dupfd(__pid_t pid, int fildes, void *ptr)
{
  int res;
  res=__duplicate_fd(pid,fildes,(int)ptr);
  unlock_desctable(pid);
  if (res) return -EMFILE;
  return EOK;
}

int getfd(__pid_t pid, int fildes, void *ptr)
{
  int res;
  res=*fildesflags_ptr(pid,fildes);
  unlock_desctable(pid);  
  return res;
}

int setfd(__pid_t pid, int fildes, void *ptr)
{
  *fildesflags_ptr(pid,fildes)=((int)ptr)&FD_CLOEXEC;
  unlock_desctable(pid);  
  return EOK;
}

int getfl(__pid_t pid, int fildes, void *ptr)
{
  int res;
  res=*fildesfflags_ptr(pid,fildes);
  unlock_desctable(pid);  
  return res;
}

int setfl(__pid_t pid, int fildes, void *ptr)
{
  *fildesfflags_ptr(pid,fildes)=((int)ptr)&
    (O_APPEND|O_DSYNC|O_NONBLOCK|O_RSYNC|O_SYNC);
  unlock_desctable(pid);  
  return EOK;
}

int dummy(__pid_t pid, int fildes, void *ptr)
{
  unlock_desctable(pid);  
  return -EINVAL;
}

static struct {
  int (*f)(__pid_t pid, int fildes, void *ptr);
} func[]={
  {dupfd},
  {getfd},
  {setfd},
  {getfl},
  {setfl},
  {dummy},
  {dummy},
  {dummy}
};

int k_fcntl(int fildes,int cmd,void *ptr)
{
  __pid_t pid;

  call_to_fs();
 
  pid=__get_pid();  
  lock_desctable(pid);
  if (!__isvalid_fd(pid,fildes)) {
    lock_desctable(pid);
    return_from_fs(-EBADF);
  }

  if (cmd<F_DUPFD||cmd>=F_SETLKW)
    return_from_fs(-ENOSYS);

  return_from_fs(func[cmd].f(pid,fildes,ptr));  
}