MKFS(8) MKFS(8)
NAME
mkfs, mkext - archive or update a file system
SYNOPSIS
disk/mkfs [-aprvoxU] [-d root] [-s source] [-z n] proto ...
disk/mkext [-d name] [-u] [-h] [-v] [-x] [-T] file ...
DESCRIPTION
Mkfs copies files from the file tree source (default /) to a
new file system root (default /n/newfs). The proto files
are read (see proto(2) for their format) and any files spec-
ified in them that are out of date are copied.
Mkfs copies only those files that are out of date.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 that are not specified in the proto file are
not updated and not removed.
The options to mkfs are:
a Instead of writing to new 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 All files in proto, not just those out of
date, are archived.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.
o Similar to -x above, but produces a list of source
file names to standard output rather than produc-
ing an archive file.
d root Copy files into the tree rooted at root (default
/n/newfs). This option suppresses setting the uid
and gid fields when copying files. Use -U to
reenable it.
p Update the permissions of a file even if it is up
to date.
U Update of uid and gid of the target files.
r Copy all files.
s source Copy from files rooted at the tree source.
v Print the names of all of the files as they are
copied.
z n Copy files assuming block size 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.
Each file on the command line is unpacked in one pass
through the archive. If the file is a directory, all files
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MKFS(8) MKFS(8)
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 options are:
d specifies a directory (default /) to serve as the root
of the unpacked file system.
u sets the owners of the files created to correspond to
those in the archive and restores the modification
times of the files.
T restores only the modification times of the files.
v 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 -s dist proto > arch
Unpack that archive onto a new file system:
srv newfs
mount -c /srv/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), sd(3), tar(1)
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