ref: a9d4e5967cb7ddd34d2e6f0826ca6a38deb3b35f
dir: /sys/man/3/sdloop/
.TH SDLOOP 3 .SH NAME sdloop \- loopback storage device interface .SH SYNOPSIS .nf .B bind -a #S /dev .BI "echo config switch on spec " l " type loop/\fIpath\fP[!\fIsectsize\fP] >/dev/sdctl" .BI /dev/sd l 0/ctl .BI /dev/sd l 0/raw .BI /dev/sd l 0/data \&... .fi .SH DESCRIPTION .I Sdloop allows a file to be used as a sd device. To configure .B /tmp/data as .BR sdl0 : with a 1024-byte sector size .IP .EX echo config switch on spec l type loop//tmp/data!1024 >/dev/sdctl .EE .PP To turn this device off, .IP .EX echo config switch off spec l >/dev/sdctl .EE .PP The configuration variable .B loopdev may be specified in .IR plan9.ini (8) to configure a loopback .I sd device at boot. For example .IP .EX loopdev=l!/tmp/data!1024 .EE .SH SOURCE .B /sys/src/9/port/sdloop.c .SH SEE ALSO .IR sd (3), .IR sdaoe (3), .IR partfs (8) .SH BUGS Maybe.