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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 "file.h"
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#include "dentry.h"
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#include "fs.h"
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int k_chdir(char *newpath)
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{
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  declare_buffer(char,pathname,MAXPATHNAME);  
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  int createflag=DENTRY_NOCREATE;
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  struct dentry *d;
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  __pid_t pid;
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  int len;
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  call_to_fs();
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  len=__verify_read_nolen((char*)newpath);
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  if ((!len)||(len>MAXPATHNAMELEN)) return_from_fs(-EVERIFY);
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  __copy_from_user(pathname,newpath,len+1);
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  pid=__get_pid();  
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  lock_desctable(pid);
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  d=find_dentry_from_ext(cwden_ptr(pid),(char *)pathname,&createflag);
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  if (d==NULL) {
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    unlock_desctable(pid);
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    return_from_fs(-ENOENT);
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  }
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  unlock_dentry(cwden_ptr(pid));
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  /* dovrebbe essere: cwden_ptr(pid)=d; */
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  desctable[pid].fd_cwden=d;
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  strcpy(cwd_ptr(pid),pathname);
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  unlock_desctable(pid);
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  return_from_fs(EOK);
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}