UNDELETE(2) BSD System Calls Manual UNDELETE(2)
NAME
undelete -- remove whiteout
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <unistd.h>
int
undelete(const char *path);
DESCRIPTION
Currently undelete works only when the named object is a whiteout in a union filesystem. The system call removes the whiteout causing any
objects in a lower layer of the union stack to become visible once more.
RETURN VALUES
Upon successful completion, a value of 0 is returned. Otherwise, a value of -1 is returned and errno is set to indicate the error.
ERRORS
The undelete() succeeds unless:
[EACCES] Search permission is denied for a component of the path prefix, or write permission is denied on the directory containing the
name to be undeleted.
[EEXIST] The path does not reference a whiteout.
[EFAULT] path points outside the process's allocated address space.
[EINVAL] The pathname contains a character with the high-order bit set.
[EIO] An I/O error occurred while updating the directory entry.
[ELOOP] Too many symbolic links were encountered in translating the pathname.
[ENAMETOOLONG] A component of a pathname exceeded 255 characters, or an entire path name exceeded 1023 characters.
[ENOENT] The named whiteout does not exist.
[ENOTDIR] A component of the path prefix is not a directory.
[EPERM] The directory containing the name is marked sticky, and the containing directory is not owned by the effective user ID.
[EROFS] The name resides on a read-only file system.
SEE ALSO
unlink(2), mount_union(8)
HISTORY
An undelete function call first appeared in 4.4BSD -Lite.
BSD
November 28, 2008 BSD
