Skip site navigation (1)Skip section navigation (2)

FreeBSD Manual Pages

  
 
  

home | help
UNDELETE(2)		    BSD	System Calls Manual		   UNDELETE(2)

NAME
     undelete -- attempt to recover a deleted file

LIBRARY
     Standard C	Library	(libc, -lc)

SYNOPSIS
     #include <unistd.h>

     int
     undelete(const char *path);

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

     Eventually, the undelete()	functionality may be expanded to other
     filesystems able to recover deleted files such as the log-structured
     filesystem.

RETURN VALUES
     The undelete() function returns the value 0 if successful;	otherwise the
     value -1 is returned and the global variable errno	is set to indicate the
     error.

ERRORS
     The undelete() succeeds unless:

     [ENOTDIR]		A component of the path	prefix is not a	directory.

     [ENAMETOOLONG]	A component of a pathname exceeded 255 characters, or
			an entire path name exceeded 1023 characters.

     [EEXIST]		The path does not reference a whiteout.

     [ENOENT]		The named whiteout does	not exist.

     [EACCES]		Search permission is denied for	a component of the
			path prefix.

     [EACCES]		Write permission is denied on the directory containing
			the name to be undeleted.

     [ELOOP]		Too many symbolic links	were encountered in translat-
			ing the	pathname.

     [EPERM]		The directory containing the name is marked sticky,
			and the	containing directory is	not owned by the ef-
			fective	user ID.

     [EIO]		An I/O error occurred while updating the directory en-
			try.

     [EROFS]		The name resides on a read-only	file system.

     [EFAULT]		Path points outside the	process's allocated address
			space.

SEE ALSO
     unlink(2),	mount_union(8)

HISTORY
     An	undelete() function call first appeared	in 4.4BSD-Lite.

BSD			       October 18, 1994				   BSD

NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUES | ERRORS | SEE ALSO | HISTORY

Want to link to this manual page? Use this URL:
<https://www.freebsd.org/cgi/man.cgi?query=undelete&sektion=2&manpath=FreeBSD+4.9-RELEASE>

home | help