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lirc.4: Document error returns more explicitly 

Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
This commit is contained in:
Sean Young 2018-11-02 11:04:35 +00:00 committed by Michael Kerrisk
parent 922819b84d
commit 5116995534
1 changed files with 21 additions and 3 deletions
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24
man4/lirc.4
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@ -187,7 +187,11 @@ If a driver does not announce support of certain features, calling of
the corresponding ioctls will return ENOTTY.
.TP
.BR LIRC_GET_REC_MODE " (\fIvoid\fP)"
Return the receive mode, which will be one of:
If the
.B lirc
device has no receiver return
.B ENOTTY,
else return the receive mode, which will be one of:
.RS 4
.TP
.BR LIRC_MODE_MODE2
@ -207,6 +211,10 @@ is either
.BR LIRC_MODE_SCANCODE
or
.BR LIRC_MODE_MODE2 .
If the
.B lirc
device has no receiver, return
.B ENOTTY.
.TP
.BR LIRC_GET_SEND_MODE " (\fIvoid\fP)"
Return the send mode.
@ -214,6 +222,10 @@ Return the send mode.
or
.BR LIRC_MODE_SCANCODE
is supported.
If the
.B lirc
device cannot send, return
.B ENOTTY.
.TP
.BR LIRC_SET_SEND_MODE " (\fIint\fP)"
Set the send mode.
@ -221,7 +233,12 @@ Set the send mode.
is either
.BR LIRC_MODE_SCANCODE
or
.BR LIRC_MODE_PULSE.
.BR LIRC_MODE_PULSE .
If the
.B lirc
device cannot send, return
.B ENOTTY
.
.TP
.BR LIRC_SET_SEND_CARRIER " (\fIint\fP)"
Set the modulation frequency.
@ -252,7 +269,8 @@ For such drivers,
.BR LIRC_GET_MIN_TIMEOUT
and
.BR LIRC_GET_MAX_TIMEOUT
will return the same value.
will return
.BR ENOTTY .
.TP
.BR LIRC_SET_REC_TIMEOUT " (\fIint\fP)"
Set the integer value for IR inactivity timeout (microseconds).