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UNDELETE(2) 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. NetBSD 7.1.2 November 28, 2008 NetBSD 7.1.2