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dracut-logger: 'user' facility for build-time and 'daemon' for boot-time

master
Amadeusz Żołnowski 2011-03-25 15:56:44 +01:00 committed by Harald Hoyer
parent 0874654c78
commit 9ebc51100b
1 changed files with 42 additions and 24 deletions
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66
dracut-logger
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@ -76,9 +76,11 @@ __DRACUT_LOGGER__=1
# - @var kmsgloglvl - logging level to /dev/kmsg (only for boot-time) # - @var kmsgloglvl - logging level to /dev/kmsg (only for boot-time)
# - @var logfile - log file which is used when @var fileloglvl is higher # - @var logfile - log file which is used when @var fileloglvl is higher
# than 0 # than 0
# and one global variable @var maxloglvl which <b>must not</b> be overwritten. # and two global variables: @var maxloglvl and @var syslogfacility which <b>must
# @var maxloglvl is set by dlog_init() and holds maximum logging level of those # not</b> be overwritten. Both are set by dlog_init(). @var maxloglvl holds
# three and indicates that dlog_init() was run. # maximum logging level of those three and indicates that dlog_init() was run.
# @var syslogfacility is set either to 'user' (when building initramfs) or
# 'daemon' (when booting).
# #
# Logging level set by the variable means that messages from this logging level # Logging level set by the variable means that messages from this logging level
# and above (FATAL is the highest) will be shown. Logging levels may be set # and above (FATAL is the highest) will be shown. Logging levels may be set
@ -101,8 +103,8 @@ __DRACUT_LOGGER__=1
# - @var kmsgloglvl = 0 (no logging) # - @var kmsgloglvl = 0 (no logging)
# set to 0 # set to 0
# #
# @warning Function sets global variable @var maxloglvl. See file doc for # @warning Function sets global variables @var maxloglvl and @syslogfacility.
# details. # See file doc comment for details.
dlog_init() { dlog_init() {
# Skip initialization if it's already done. # Skip initialization if it's already done.
[ -n "$maxloglvl" ] && return 0 [ -n "$maxloglvl" ] && return 0
@ -144,6 +146,15 @@ dlog_init() {
fi fi
fi fi


if [ $sysloglvl -gt 0 -o $kmsgloglvl -gt 0 ]; then
if [ -n "$dracutbasedir" ]; then
readonly syslogfacility=user
else
readonly syslogfacility=daemon
fi
export syslogfacility
fi

local lvl; local maxloglvl_l=0 local lvl; local maxloglvl_l=0
for lvl in $stdloglvl $sysloglvl $fileloglvl $kmsgloglvl; do for lvl in $stdloglvl $sysloglvl $fileloglvl $kmsgloglvl; do
[ $lvl -gt $maxloglvl_l ] && maxloglvl_l=$lvl [ $lvl -gt $maxloglvl_l ] && maxloglvl_l=$lvl
@ -180,7 +191,8 @@ _lvl2char() {
# @retval 1 if @a lvl is out of range. # @retval 1 if @a lvl is out of range.
# @retval 0 if @a lvl is correct. # @retval 0 if @a lvl is correct.
# @result Echoes logger priority. # @result Echoes logger priority.
_lvl2syslogpri() { _lvl2syspri() {
printf $syslogfacility.
case "$1" in case "$1" in
1) echo crit;; 1) echo crit;;
2) echo error;; 2) echo error;;
@ -192,7 +204,7 @@ _lvl2syslogpri() {
esac esac
} }


## @brief Converts dracut-logger numeric level to kernel console log level ## @brief Converts dracut-logger numeric level to syslog log level
# #
# @param lvl Numeric logging level in range from 1 to 6. # @param lvl Numeric logging level in range from 1 to 6.
# @retval 1 if @a lvl is out of range. # @retval 1 if @a lvl is out of range.
@ -202,26 +214,32 @@ _lvl2syslogpri() {
# Conversion is done as follows: # Conversion is done as follows:
# #
# <tt> # <tt>
# none -> KERN_EMERG (0) # FATAL(1) -> LOG_EMERG (0)
# FATAL(1) -> KERN_ALERT (1) # none -> LOG_ALERT (1)
# none -> KERN_CRIT (2) # none -> LOG_CRIT (2)
# ERROR(2) -> KERN_ERR (3) # ERROR(2) -> LOG_ERR (3)
# WARN(3) -> KERN_WARNING (4) # WARN(3) -> LOG_WARNING (4)
# none -> KERN_NOTICE (5) # none -> LOG_NOTICE (5)
# INFO(4) -> KERN_INFO (6) # INFO(4) -> LOG_INFO (6)
# DEBUG(5) -> KERN_DEBUG (7) # DEBUG(5) -> LOG_DEBUG (7)
# TRACE(6) / # TRACE(6) /
# </tt> # </tt>
_dlvl2klvl() { #
# @see /usr/include/sys/syslog.h
_dlvl2syslvl() {
local lvl

case "$1" in case "$1" in
1) echo 1;; 1) lvl=0;;
2) echo 3;; 2) lvl=3;;
3) echo 4;; 3) lvl=4;;
4) echo 6;; 4) lvl=6;;
5) echo 7;; 5) lvl=7;;
6) echo 7;; 6) lvl=7;;
*) return 1;; *) return 1;;
esac esac

[ "$syslogfacility" = user ] && echo $((8+$lvl)) || echo $((24+$lvl))
} }


## @brief Prints to stderr and/or writes to file, to syslog and/or /dev/kmsg ## @brief Prints to stderr and/or writes to file, to syslog and/or /dev/kmsg
@ -261,13 +279,13 @@ _do_dlog() {


[ $lvl -le $stdloglvl ] && echo "$msg" >&2 [ $lvl -le $stdloglvl ] && echo "$msg" >&2
if [ $lvl -le $sysloglvl ]; then if [ $lvl -le $sysloglvl ]; then
logger -t "dracut[$$]" -p $(_lvl2syslogpri $lvl) "$msg" logger -t "dracut[$$]" -p $(_lvl2syspri $lvl) "$msg"
fi fi
if [ $lvl -le $fileloglvl -a -w "$logfile" -a -f "$logfile" ]; then if [ $lvl -le $fileloglvl -a -w "$logfile" -a -f "$logfile" ]; then
echo "$msg" >>"$logfile" echo "$msg" >>"$logfile"
fi fi
[ $lvl -le $kmsgloglvl ] && \ [ $lvl -le $kmsgloglvl ] && \
echo "<$(_dlvl2klvl $lvl)>dracut[$$] $msg" >/dev/kmsg echo "<$(_dlvl2syslvl $lvl)>dracut[$$] $msg" >/dev/kmsg
} }


## @brief Internal helper function for _do_dlog() ## @brief Internal helper function for _do_dlog()