From 39c623c010d2f87058e63fe025fcbf4b04c61ef6 Mon Sep 17 00:00:00 2001 From: sigsegv7 Date: Wed, 4 Oct 2023 16:09:10 -0400 Subject: kernel/docs: Add syslog(9) manpage Signed-off-by: sigsegv7 --- share/man/man9/syslog.9 | 71 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 71 insertions(+) create mode 100644 share/man/man9/syslog.9 (limited to 'share/man/man9') diff --git a/share/man/man9/syslog.9 b/share/man/man9/syslog.9 new file mode 100644 index 0000000..6b6ecab --- /dev/null +++ b/share/man/man9/syslog.9 @@ -0,0 +1,71 @@ +.\" Copyright (c) 2023 Ian Marco Moffett and the VegaOS team. +.\" All rights reserved. +.\" +.\" 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. +.\" 3. Neither the name of VegaOS nor the names of its +.\" contributors may be used to endorse or promote products derived from +.\" this software without specific prior written permission. +.\" +.\" THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 COPYRIGHT OWNER OR CONTRIBUTORS 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 October 4, 2023 +.Dt SYSLOG 9 +.Os +.Sh NAME +.Nm syslog - vega system logging interface +.Sh SYNOPSIS +.In sys/syslog.h + +.Bd -literal +void kprintf(const char *fmt, ...); +void vkprintf(const char *fmt, va_list *ap); +.Ed + +.Sh DESCRIPTION +The Vega syslog interface allows kernel logging. The +.Ft kprintf() +function allows writing a string with formatting. + +The +.Ft vkprintf() +function allows passing a pointer to a +.Ft va_list +somewhere in memory. While essentially doing the same thing as +.Ft kprintf() + +The "%c" format specifier is for characters (single byte) + +The "%s" format specifier is for strings + +The "%d" format specifier is for base-10 values + +The "%x" format specifier is for base-16 values + +Is it recommend to use macros like +.Ft KINFO() +or similar for standard logging. + +All of these macros are defined in the +.Ft sys/syslog.h +header. But require +.Ft __THIS_MODULE +to be defined by the +.Ft __MODULE_NAME() +macro found in +.Ft sys/cdefs.h -- cgit v1.2.3