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 The proto files are read (see proto(2) for their format) and any files spec- ified in them that are out of date are copied. Mkfs copies only those files that are out of date.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 All files in proto, not just those out of date, are archived.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 Page 1 Plan 9 (printed 10/14/24) 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) Page 2 Plan 9 (printed 10/14/24)