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Document quoting requirements for the devctl protocol

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Belatedly document the quoting requirements for the devctl protocol. I
thought they'd been previously documented.

Also, while I'm here, make igor happy.

Reviewed by: bcr
Differential Revision: https://reviews.freebsd.org/D26520
This commit is contained in:
Warner Losh 2020-09-22 23:01:57 +00:00
parent c6d67028c7
commit a5dca7c7e4
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=366026
1 changed files with 17 additions and 1 deletions
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18
share/man/man4/devctl.4
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@ -23,12 +23,16 @@
.\"
.\" $FreeBSD$
.\"
.Dd March 26, 2014
.Dd September 21, 2020
.Dt DEVCTL 4
.Os
.Sh NAME
.Nm devctl
.Nd "device event reporting and device control interface"
.Sh SYNOPSIS
The
.Nm
driver is automatically included in the kernel.
.Sh DESCRIPTION
The
.Nm
@ -124,5 +128,17 @@ driver.
The attach message driver has already claimed this device.
One cannot use the detach messages to flush data to the device.
The device is already gone.
.Pp
All values passed back are of the form
.Sq key=value
or
.Sq key="value" .
When the latter, the string
.Dq value
must have any internal backslashes doubled.
It must also have any internal double quote characters
.Sq "
preceded by a backslash.
All other characters should be passed through.
.Sh SEE ALSO
.Xr devd 8