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#include <fs/types.h>
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#include <fs/errno.h>
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#include <fs/task.h>
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#include <fs/util.h>
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#include <fs/maccess.h>
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#include <fs/fcntl.h>
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#include "file.h"
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#include "dentry.h"
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#include "fs.h"
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/*
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  this are from bits/fcntl.h
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  if they are changed then this code must be rewritten!  
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  #define F_DUPFD               0
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  #define F_GETFD               1
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  #define F_SETFD               2
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  #define F_GETFL               3
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  #define F_SETFL               4
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  #define F_GETLK               5
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  #define F_SETLK               6
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  #define F_SETLKW              7
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 */
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int dupfd(__pid_t pid, int fildes, void *ptr)
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{
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  int res;
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  res=__duplicate_fd(pid,fildes,(int)ptr);
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  unlock_desctable(pid);
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  if (res) return -EMFILE;
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  return EOK;
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}
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int getfd(__pid_t pid, int fildes, void *ptr)
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{
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  int res;
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  res=*fildesflags_ptr(pid,fildes);
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  unlock_desctable(pid);  
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  return res;
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}
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int setfd(__pid_t pid, int fildes, void *ptr)
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{
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  *fildesflags_ptr(pid,fildes)=((int)ptr)&FD_CLOEXEC;
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  unlock_desctable(pid);  
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  return EOK;
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}
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int getfl(__pid_t pid, int fildes, void *ptr)
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{
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  int res;
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  res=*fildesfflags_ptr(pid,fildes);
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  unlock_desctable(pid);  
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  return res;
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}
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int setfl(__pid_t pid, int fildes, void *ptr)
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{
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  *fildesfflags_ptr(pid,fildes)=((int)ptr)&
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    (O_APPEND|O_DSYNC|O_NONBLOCK|O_RSYNC|O_SYNC);
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  unlock_desctable(pid);  
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  return EOK;
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}
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int dummy(__pid_t pid, int fildes, void *ptr)
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{
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  unlock_desctable(pid);  
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  return -EINVAL;
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}
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static struct {
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  int (*f)(__pid_t pid, int fildes, void *ptr);
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} func[]={
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  {dupfd},
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  {getfd},
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  {setfd},
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  {getfl},
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  {setfl},
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  {dummy},
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  {dummy},
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  {dummy}
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};
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int k_fcntl(int fildes,int cmd,void *ptr)
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{
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  __pid_t pid;
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  call_to_fs();
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  pid=__get_pid();  
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  lock_desctable(pid);
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  if (!__isvalid_fd(pid,fildes)) {
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    lock_desctable(pid);
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    return_from_fs(-EBADF);
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  }
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  if (cmd<F_DUPFD||cmd>=F_SETLKW)
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    return_from_fs(-ENOSYS);
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  return_from_fs(func[cmd].f(pid,fildes,ptr));  
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}