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+.TH SACFS 4
+.SH NAME
+sacfs  \- compressed file system
+.SH SYNOPSIS
+.B disk/sacfs
+[
+.B -i
+.I infd
+.I outfd
+]
+[
+.B -s
+]
+[
+.B -m
+.I mountpoint
+]
+.I file
+.SH DESCRIPTION
+Sacfs interprets the compressed, block based file system created by
+.IR mksacfs (8)
+and stored in
+.I file
+so that it can be mounted into a Plan 9 file system.
+.I Sacfs
+is typically used to create a stand alone file system from
+a small persistent storage device, such as a flash rom.
+It does not authenticate its clients and assumes each group
+has a single member with the same name.
+.PP
+The
+.B -s
+flag causes
+.I sacfs
+to post its channel on
+.BR #s/sacfs .
+The
+.B -i
+flag causes
+.I sacfs
+to use file descriptors
+.I infd
+and
+.I outfd
+for its communication channel.
+If neither
+.B -s
+nor
+.B -i
+are given,
+.I sacfs
+mounts itself on
+.IR mountpoint
+(default
+.BR /n/c: ).
+.SH SOURCE
+.B /sys/src/cmd/disk/sacfs/sacfs.c
+.SH "SEE ALSO"
+.IR mksacfs (8)