PWB1/usr/man/man8/clri.8

.th CLRI VIII 5/31/77
.sh NAME
clri \*- clear i-node
.sh SYNOPSIS
.bd /etc/clri
i-number [ filesystem ]
.sh DESCRIPTION
.it Clri
writes zeros on the 32 bytes occupied by the i-node
numbered
.it i-number.
If the
.it "filesystem"
argument is given, the i-node resides on
the given device, otherwise on a
default file system.
The
.it filesystem
argument
must be a special file
name referring to a device
containing a file system.
After
.it clri,
any blocks
in the affected file
will show up as ``missing'' in an
.it check
of the
.it filesystem.
.s3
Read and write permission is required on the specified
.it filesystem
device.
The i-node becomes allocatable.
.s3
The primary purpose of this routine
is to remove a file which
for some reason appears in no
directory.
If it is used to zap an i-node
which does appear in a directory, care should be taken to track down
the entry and remove it.
Otherwise, when the i-node is reallocated to some new file,
the old entry will still point to that file.
At that point removing the old entry will destroy the new file.
The new entry will again point to an unallocated i-node,
so the whole cycle is likely to be repeated again and again.
.sh "SEE ALSO"
clrm(VIII), check(VIII)
.sh BUGS
Whatever the default file system is,
it is likely to be wrong.
Specify the
.it filesystem
explicitly.
.s3
If the file is open,
.it clri
is likely to be ineffective.
.s3
.it Clri
is not as handy as
.it clrm(VIII).