ref: 592b8d5b3528ba34f5bd0fffebdffcac1c9450cd
dir: /sys/man/8/mkfs/
.TH MKFS 8 .SH NAME mkfs, mkext \- archive or update a file system .SH SYNOPSIS .B disk/mkfs .RB [ -aprvoxU ] .RB [ -d .IR root ] .RB [ -n .IR name ] .RB [ -s .IR source ] .RB [ -u .IR users ] .RB [ -z .IR n ] .I proto ... .PP .B disk/mkext .RB [ -d .IR name ] .RB [ -u ] .RB [ -h ] .RB [ -v ] .RB [ -x ] .RB [ -T ] .I file ... .SH DESCRIPTION .I Mkfs copies files from the file tree .I source (default .BR / ) to a .B kfs file system (see .IR kfs (4)). The kfs service is mounted on .I root (default .BR /n/kfs ), and .B /adm/users is copied to .IB root /adm/users\f1. The .I proto files are read (see .IR proto (2) for their format) and any files specified in them that are out of date are copied to .BR /n/kfs . .PP .I Mkfs copies only those files that are out of date.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 .I kfs file system that are not specified in the .I proto file are not updated and not removed. .PP The options to .I mkfs are: .TF "s source" .TP .B a Instead of writing to a .B kfs file system, write an archive file to standard output, suitable for .IR mkext . All files in .IR proto , not just those out of date, are archived. .TP .B x For use with .BR -a , this option writes a list of file names, dates, and sizes to standard output rather than producing an archive file. .TP .B o Similar to .BR -x above, but produces a list of source file names to standard output rather than producing an archive file. .TP .BI "d " root Copy files into the tree rooted at .I root (default .BR /n/kfs ). This option suppresses setting the .B uid and .B gid fields when copying files. Use .B -U to reenable it. .TP .BI "n " name Use .RI kfs. name as the name of the kfs service (default .BR kfs ). .TP .B p Update the permissions of a file even if it is up to date. .TP .B U Update of uid and gid of the target files. .TP .B r Copy all files. .TP .BI "s " source Copy from files rooted at the tree .IR source . .TP .BI "u " users Copy file .I users into .B /adm/users in the new system. .TP .B v Print the names of all of the files as they are copied. .TP .BI "z " n Copy files assuming kfs block .I n (default 1024) bytes long. If a block contains only 0-valued bytes, it is not copied. .PD .PP .I Mkext unpacks archive files made by the .B -a option of .IR mkfs . 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 options are: .TP .B d specifies a directory (default .BR / ) to serve as the root of the unpacked file system. .TP .B u sets the owners of the files created to correspond to those in the archive and restores the modification times of the files. .TP .B T restores only the modification times of the files. .TP .B v prints the names and sizes of files as they are extracted. .TP .B h prints headers for the files on standard output instead of unpacking the files. .PD .SH EXAMPLES .PP Make an archive to establish a new file system: .IP .EX disk/mkfs -a -u files/adm.users -s dist proto > arch .EE .PP Unpack that archive onto a new file system: .IP .EX srv newfs mount -c /srv/newfs /n/newfs disk/mkext -u -d /n/newfs < arch .EE .SH SOURCE .B /sys/src/cmd/disk/mkfs.c .br .B /sys/src/cmd/disk/mkext.c .SH "SEE ALSO" .IR prep (8), .IR kfscmd (8), .IR sd (3), .IR tar (1)