freebsd-skq/share/man/man9/device_printf.9

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.\"
.\" Copyright (c) 2003 M. Warner Losh <imp@FreeBSD.org>
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.\"
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.Dd April 21, 2003
.Dt DEVICE_PRINTF 9
.Os
.Sh NAME
.Nm device_printf
.Nd formatted output conversion
.Sh SYNOPSIS
.In sys/param.h
.In sys/bus.h
.Ft int
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.Fn device_printf "device_t dev" "const char *fmt" ...
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.Sh DESCRIPTION
The
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.Fn device_printf
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function is a convenience interface to the
.Xr printf 9
function.
It outputs the name of the
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.Fa dev
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device, followed by a colon and a space, and then what
.Xr printf 9
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would print if you passed
.Fa fmt
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and the remaining arguments to it.
.Sh RETURN VALUES
The
.Fn device_printf
function returns the number of characters displayed.
.Sh SEE ALSO
.Xr printf 3 ,
.Xr printf 9