MKFS(8) MKFS(8)
NAME
mkfs, mkext - archive or update a file system
SYNOPSIS
disk/mkfs [-aprv] [-n name] [-s source] [-u users] [-z n] proto ...
disk/mkext [-d name] [-u] [-h] [-v] 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 /n/kfs, and
/adm/users is copied to /n/kfs/adm/users. The proto files are read,
and any files specified in them that are out of date are copied to
/n/kfs.
Each line of the proto file specifies a file to copy. Indentation is
significant, with each level of indentation corresponding to a level in
the file tree. Fields within a line are separated by white space. The
first field is the last path element in the destination file tree. The
second field specifies the permissions. The third field is the owner
of the file, and the fourth is the group owning the file. The fifth
field is the name of the file from which to copy; this file is read
from the current name space, not the source file tree. All fields
except the first are optional.
Names beginning with a are expanded as environment variables. If the
first file specified in a directory is all of the files in that direc-
tory are copied. If the first file is all of the files are copied, and
all subdirectories are recursively copied.
Mkfs copies only those files that are out of date. Such a file is
first copied into a temporary file in the appropriate 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just those out of date, are archived.
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 /n/kfs) to serve as the root of
the unpacked file system. The -u option, to be used only when initial-
izing 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
intermediate 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
FILES
/lib/proto
directory of prototype files.
/lib/proto/portproto
generic prototype file.
SOURCE
/sys/src/cmd/disk/mkfs.c
/sys/src/cmd/disk/mkext.c
SEE ALSO
prep(8), kfscmd(8), wren(3), pip(8)
MKFS(8)
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