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Fix #40: update docs and online help text wrt. caching of kmsg seqno

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Signed-off-by: Joachim Wiberg <troglobit@gmail.com>
This commit is contained in:
Joachim Wiberg 2021-07-26 14:04:45 +02:00
parent 5211bcee08
commit b0d4e4cc3f
3 changed files with 17 additions and 1 deletions
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5
README.md
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@ -132,6 +132,11 @@ sudo make install-strip
You may want to remove the `--prefix=/usr` option. Most users prefer You may want to remove the `--prefix=/usr` option. Most users prefer
non-distro binaries in `/usr/local` or `/opt`. non-distro binaries in `/usr/local` or `/opt`.
> **Note:** the `--runstatedir` option should point to a filesystem
> that is cleaned at reboot. syslogd relies on this for
> its `syslogd.cache` file, which keeps track of the last
> read kernel log message from `/dev/kmsg`.
Building from GIT Building from GIT
----------------- -----------------

12
man/syslogd.8
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@ -220,6 +220,13 @@ If
cannot write to, or read from, this file it will cause repeated kernel cannot write to, or read from, this file it will cause repeated kernel
log messages when restarting log messages when restarting
.Nm . .Nm .
.Pp
.Sy Note:
.Nm
relies on this file being removed at system reboot. The default
location depends on the system and how
.Nm
was configured.
.It Fl d .It Fl d
Put Put
.Nm .Nm
@ -461,7 +468,10 @@ conventional name for default rules.
default process ID file default process ID file
.It Pa /var/run/syslogd.cache .It Pa /var/run/syslogd.cache
cache of last read sequence number from cache of last read sequence number from
.Pa /dev/kmsg .Pa /dev/kmsg .
Please note,
.Nm
relies on this file being removed at system reboot.
.It Pa /dev/log .It Pa /dev/log
name of the name of the
.Ux .Ux

1
src/syslogd.c
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@ -275,6 +275,7 @@ int usage(int code)
" default: 'syslog', port 514\n" " default: 'syslog', port 514\n"
"\n" "\n"
" -C FILE File to cache last read kernel seqno, default: %s\n" " -C FILE File to cache last read kernel seqno, default: %s\n"
" Note: syslogd relies on this file being removed at system reboot.\n"
" -d Enable debug mode, implicitly enables -F to prevent backgrounding\n" " -d Enable debug mode, implicitly enables -F to prevent backgrounding\n"
" -F Run in foreground, required when monitored by init(1)\n" " -F Run in foreground, required when monitored by init(1)\n"
" -f FILE Alternate .conf file, default: %s\n" " -f FILE Alternate .conf file, default: %s\n"