MKFS(8) MKFS(8)
NAME
mkfs, mkext - archive or update a file system
SYNOPSIS
disk/mkfs [-aprvx] [-d root] [-n name] [-s source] [-u
users] [-z n] proto ...
disk/mkext [-d name] [-u] [-h] [-v] [-x] file ...
DESCRIPTION
Mkfs copies files from the file tree source (default /) to a
kfs file system (see kfs(4)). The kfs service is mounted on
root (default /n/kfs), and /adm/users is copied to
root/adm/users. The proto files are read (see proto(2) for
their format) and any files specified in them that are out
of date are copied to /n/kfs.
Mkfs copies only those files that are out of date. Such a
file is first copied into a temporary file in the appropri-
ate destination directory and then moved to the destination
file. Files in the kfs file system that are not specified
in the proto file are not updated and not removed.
The options to mkfs are:
a Instead of writing to a kfs file system, write an
archive file to standard output, suitable for
mkext. All files in proto, not just those out of
date, are archived.
x For use with -a, this option writes a list of file
names, dates, and sizes to standard output rather
than producing an archive file.
d root Copy files into the tree rooted at root (default
/n/kfs).
n name Use kfs.name as the name of the kfs service
(default kfs).
p Update the permissions of a file even if it is up
to date.
r Copy all files.
s source Copy from files rooted at the tree source.
u users Copy file users into /adm/users in the new system.
v Print the names of all of the files as they are
copied.
z n Copy files assuming kfs block n (default 1024)
bytes long. If a block contains only 0-valued
bytes, it is not copied.
Mkext unpacks archive files made by the -a option of mkfs.
The -d option specifies a directory (default /) to serve as
the root of the unpacked file system. The -u option, to be
MKFS(8) MKFS(8)
used only when initializing a new fs(4) file system, sets
the owners of the files created to correspond to those in
the archive and restores the modification times of the
files. (This is only permitted at the initial load of the
files into a file system.) Each file on the command line is
unpacked in one pass through the archive. If the file is a
directory, all files and subdirectories of that directory
are also unpacked. When a file is unpacked, the entire path
is created if it does not exist. If no files are specified,
the entire archive is unpacked; in this case, missing inter-
mediate directories are not created. The -v option prints
the names and sizes of files as they are extracted; -h
prints headers for the files on standard output instead of
unpacking the files.
EXAMPLES
Make an archive to establish a new file system:
disk/mkfs -a -u files/adm.users -s dist proto > arch
Unpack that archive onto a new file system:
srv il!newfs
mount -c /srv/il!newfs /n/newfs
disk/mkext -u -d /n/newfs < arch
SOURCE
/sys/src/cmd/disk/mkfs.c
/sys/src/cmd/disk/mkext.c
SEE ALSO
prep(8), kfscmd(8), sd(3)