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undelete ()
  • >> undelete (2) ( FreeBSD man: Системные вызовы )

  • BSD mandoc
     

    NAME

    
    
    undelete
    
     - attempt to recover a deleted file
    
     
    

    LIBRARY

    Lb libc
    
     
    

    SYNOPSIS

       #include <unistd.h>
    int undelete (const char *path);
     

    DESCRIPTION

    The undelete ();
    system call attempts to recover the deleted file named by Fa path . Currently, this works only when the named object is a whiteout in a union file system. The system call removes the whiteout causing any objects in a lower layer of the union stack to become visible once more.

    Eventually, the undelete ();
    functionality may be expanded to other file systems able to recover deleted files such as the log-structured file system.  

    RETURN VALUES

    Rv -std undelete  

    ERRORS

    The undelete ();
    succeeds unless:

    Bq Er ENOTDIR
    A component of the path prefix is not a directory.
    Bq Er ENAMETOOLONG
    A component of a pathname exceeded 255 characters, or an entire path name exceeded 1023 characters.
    Bq Er EEXIST
    The path does not reference a whiteout.
    Bq Er ENOENT
    The named whiteout does not exist.
    Bq Er EACCES
    Search permission is denied for a component of the path prefix.
    Bq Er EACCES
    Write permission is denied on the directory containing the name to be undeleted.
    Bq Er ELOOP
    Too many symbolic links were encountered in translating the pathname.
    Bq Er EPERM
    The directory containing the name is marked sticky, and the containing directory is not owned by the effective user ID.
    Bq Er EINVAL
    The last component of the path is `..'
    Bq Er EIO
    An I/O error occurred while updating the directory entry.
    Bq Er EROFS
    The name resides on a read-only file system.
    Bq Er EFAULT
    The Fa path argument points outside the process's allocated address space.

     

    SEE ALSO

    unlink(2), mount_unionfs8  

    HISTORY

    The undelete ();
    system call first appeared in BSD 4.4 Lite


     

    Index

    NAME
    LIBRARY
    SYNOPSIS
    DESCRIPTION
    RETURN VALUES
    ERRORS
    SEE ALSO
    HISTORY


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