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+.\"
+.\" Copyright (c) 2020 M Warner Losh
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY EXPRESS OR
+.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+.\" IN NO EVENT SHALL THE DEVELOPERS BE LIABLE FOR ANY DIRECT, INDIRECT,
+.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+.\"
+.Dd September 22, 2020
+.Dt DEVCTL_SAFE_QUOTE_SB 9
+.Os
+.Sh NAME
+.Nm devctl_safe_quote_sb
+.Nd Insert a string, properly quoted, into a sbuf
+.Sh SYNOPSIS
+.In sys/devctl.h
+.In sys/sbuf.h
+.Ft void
+.Fn devctl_safe_quote_sb "struct sbuf *sb" "const char *src"
+.Sh DESCRIPTION
+Copy the string from
+.Va src
+into
+.Va sb .
+All backslash characters are doubled.
+All double quote characters
+.Sq \&"
+are also preceded by a backslash.
+All other characters are copied without modification.
+The
+.Xr devctl 4
+protocol requires quoted string to be quoted thus.
+This routine centralizes this knowledge.
+.Sh SEE ALSO
+.Xr devd 8
+.Sh AUTHORS
+This manual page was written by
+.An M. Warner Losh