一些方便系统诊断的bash函数

2018-01-13 11:00:39来源:http://hongjiang.info/common-bash-functions/作者:在路上人点击

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这段脚本包含100多个bash函数,是我几年前方便自己调试和诊断问题写的。贴出来给有需要的人,因为比较懒怎么使用这些函数就不写说明了。其中以下划线开头的是表示私有函数,以cf_
开头的表示公共函数,可当做命令使用。


# check current os is linux
function cf_is_linux() {
[[ "$OSTYPE" = *linux* ]] && echo "true" && return 0
echo "false" && return 1
}
# check current os is mac/darwin
function cf_is_darwin() {
[[ "$OSTYPE" = *darwin* ]] && echo "true" && return 0
echo "false" && return 1
}
# check current os is windows/cygwin
function cf_is_cygwin() {
[[ "$OSTYPE" = *cygwin* ]] && echo "true" && return 0
echo "false" && return 1
}
function cf_is_gnu_date() {
date --version >/dev/null 2>&1 && echo "true" && return 0
echo "false" && return 1
}
function cf_is_gnu_sed() {
sed --version >/dev/null 2>&1 && echo "true" && return 0
echo "false" && return 1
}
function cf_is_gnu_awk() {
awk --version | grep GNU >/dev/null && echo "true" && return 0
echo "false" && return 1
}
function cf_is_gnu_grep() {
grep --version | grep GNU >/dev/null && echo "true" && return 0
echo "false" && return 1
}
# java style startsWith
function cf_starts_with() {
local str=$1
local pre=$2
[[ "$str" ==${pre}* ]]
}
# java style substring
function cf_substring() {
local str=$1
local begin=$2
local end=$3
if [ -z "$end" ]; then
echo ${str:$begin}
else
local len=`expr $end - $begin`
echo ${str:$begin:$len}
fi
}
# get current shell name
function cf_shell_name() {
local name=$( ps -ocommand= -p $$ | awk '{print $1}')
if cf_starts_with $name "-"; then
cf_substring $name 1
else
echo $name
fi
}
# check current shell is bash
function cf_is_bash() {
[[ `cf_shell_name` = "-bash" || `basename $(cf_shell_name)` = "bash" ]] && echo "true" && return 0
echo "false" && return 1
}
# check current shell is zsh
function cf_is_zsh() {
[[ `cf_shell_name` = "-zsh" || `basename $(cf_shell_name)` = "zsh" ]] && echo "true" && return 0
echo "false" && return 1
}
function _script_dir() {
if cf_is_bash >/dev/null; then
cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd -P
elif cf_is_zsh >/dev/null; then
cd "$( dirname "${(%):-%N}" )" && pwd -P
else
echo "unsupported shell" && return 1
fi
}
function _script_file() {
if cf_is_bash >/dev/null; then
basename "${BASH_SOURCE[0]}"
elif cf_is_zsh >/dev/null; then
basename "${(%):-%N}"
else
echo "unsupported shell" && return 1
fi
}
# colorful grep. private function
function _get_colorful_grep() {
cf_is_gnu_grep >/dev/null && echo "grep --color" && return 0
export GREP_OPTIONS='--color=always'
export GREP_COLOR='1;35;40'
echo "grep"
}
# list all common functions
function cf_functions() {
if cf_is_bash >/dev/null; then
declare -F | awk '{print $NF}' | grep "cf_" | sort
elif cf_is_zsh >/dev/null; then
print -l ${(ok)functions} | grep "cf_" | sort
else
echo "unsupported shell" && return 1
fi
}
# get total memory (MB)
function cf_mem_total() {
if cf_is_linux >/dev/null; then
free -m | awk '/^Mem/{print $2"M"}'
elif cf_is_darwin >/dev/null; then
sysctl hw.memsize | awk '{print $2/1024/1024"M"}'
else
echo "unsupported os" && return 1
fi
}
# decimal to hexadecimal
function cf_dec2Hex() {
printf "%x" $1
}
# decimal to octal
function cf_dec2Oct() {
printf "%o" $1
}
# decimal to binary
function cf_dec2Bin() {
echo "obase=2; $1" | bc
}
# hexadecimal to decimal
function cf_hex2Dec() {
echo $((16#$1))
}
# octal to decimal
function cf_oct2Dec() {
echo $((8#$1))
}
# binary to decimal
function cf_bin2Dec() {
echo $((2#$1))
}
function cf_calc() {
local exp="$1"
echo "$exp" | bc -l | awk '{printf "%.2f", $0}'
}
# warning and exit, not for interactive shell
function cf_die() {
local msg="$1"
local code=${2:-1}
echo "$msg" && exit $code
}
# highlight key words from file or pipeline
function cf_highlight() {
local keyword="$1"
local cgrep="$(_get_colorful_grep)"
if [ -p /dev/stdin ]; then
# from pipeline
while IFS='' read line; do
echo $line | eval "$cgrep -E /"${keyword}|$/""
done
else
local file="$2"
eval "$cgrep -E /"${keyword}|$/"" "$file"
fi
}
function cf_ps_env() {
local pid=$1
! cf_is_pid_exists >/dev/null $pid && echo "pid:$pid not exists" && return 1
if cf_is_linux >/dev/null; then
xargs --null --max-args=1 < /proc/$pid/environ
elif cf_is_darwin >/dev/null; then
ps -wwE -p $pid
else
echo "unsupported os" && return 1
fi
}
# get bash(current shell) major version
function cf_bash_major_ver() {
echo ${BASH_VERSINFO[0]}
}
# get bash(current shell) minor version
function cf_bash_minor_ver() {
echo ${BASH_VERSINFO[1]}
}
# get kernel version
function cf_kernel_ver() {
if cf_is_linux >/dev/null; then
uname -r | cut -d'-' -f1
elif cf_is_darwin >/dev/null; then
uname -r | cut -d'-' -f1
else
echo "unsupported os" && return 1
fi
}
# get kernel major version
function cf_kernel_major_ver() {
if cf_is_linux >/dev/null; then
uname -r | awk -F'.' '{print $1"."$2}'
elif cf_is_darwin >/dev/null; then
uname -r | awk -F'.' '{print $1"."$2}'
else
echo "unsupported os" && return 1
fi
}
# get kernel minor version
function cf_kernel_minor_ver() {
if cf_is_linux >/dev/null; then
uname -r | awk -F'.' '{print $3}'
elif cf_is_darwin >/dev/null; then
uname -r | awk -F'.' '{print $3}'
else
echo "unsupported os" && return 1
fi
}
# get value from config file such as app.properties
function cf_get_property() {
local file="$1"
local key="$2"
grep "^${key}=" "$file" | tr -d '/r' | cut -d'=' -f2 | cf_trim
}
# get command path, eg: `cf_command_path ls` output /usr/bin/ls
function cf_command_path() {
local cmd=$1
cf_is_bash && builtin type -P $cmd && return $?
if [ -x /usr/bin/which ]; then
local p=$( /usr/bin/which $1 | head -1 )
[ ! -z "$p" ] && echo $p && return 0
return 1
else
local p=$( which $1 | grep "^/" | head -1 )
[ ! -z "$p" ] && echo $p && return 0
return 1
fi
}
# get all ip addresses
function cf_ip_list() {
if [ -x /sbin/ip ]; then
local list=$(/sbin/ip -o -4 addr list | awk '{print $4}' | cut -d'/' -f1 | tr '/n' ',')
else
local list=$(/sbin/ifconfig | grep "inet " | awk '{print $2}' | sed 's/addr://' | tr '/n' ',')
fi
echo ${list%,}
}
function cf_stdio() {
local pid=$1
/usr/sbin/lsof -a -p $pid -d 0,1,2
}
function cf_stdout() {
local pid=$1
if cf_is_linux >/dev/null; then
readlink -f /proc/$pid/fd/1
elif cf_is_darwin >/dev/null; then
/usr/sbin/lsof -a -p $pid -d 1 | awk 'NR>1{print $NF}'
else
echo "unsupported os" && return 1
fi
}
# get file last modification time
function cf_last_modification() {
local file="$1"
if [[ $OSTYPE == *linux* ]];then
date +%Y%m%d%H%M%S -r $file
elif [[ $OSTYPE == *darwin* ]];then
stat -f "%Sm" -t "%Y%m%d%H%M%S" $file
fi
}
# check current user is root
function cf_is_root() {
[ `whoami` = "root" ] && echo "true" && return 0
echo "false" && return 1
}
# check current shell is interactive
function cf_is_interactive_shell() {
if cf_is_bash >/dev/null; then
[[ "$-" = *i* ]] && echo "true" && return 0
elif cf_is_zsh >/dev/null; then
[[ -o interactive ]] && echo "true" && return 0
else
echo "unsupported shell" && return 1
fi
echo "false" && return 1
}
# check current shell is login shell
function cf_is_login_shell() {
if cf_is_bash >/dev/null; then
shopt -q login_shell && echo "true" && return 0
elif cf_is_zsh >/dev/null; then
[[ -o login ]] && echo "true" && return 0
else
echo "unsupported shell" && return 1
fi
echo "false" && return 1
}
# check command is exists
function cf_is_command_exists() {
local cmd=$1
if [ -x /usr/bin/which ]; then
/usr/bin/which $cmd >/dev/null 2>&1 && echo "true" && return 0
else
which $cmd >/dev/null 2>&1 && echo "true" && return 0
fi
echo "false" && return 1
}
# check file name globbing flag
function cf_is_glob_enabled() {
if cf_is_bash >/dev/null; then
[[ $- != *f* ]] && echo "true" && return 0
elif cf_is_zsh >/dev/null; then
[[ -o glob ]] && echo "true" && return 0
else
echo "unsupported shell" && return 1
fi
echo "false" && return 1
}
# enable file name globbing
function cf_enable_glob() {
cf_is_bash >/dev/null && set +f && return 0
cf_is_zsh >/dev/null && set -o glob && return 0
echo "unsupported shell" && return 1
}
# disable file name globbing
function cf_disable_glob() {
cf_is_bash >/dev/null && set -f && return 0
cf_is_zsh >/dev/null && set -o noglob && return 0
echo "unsupported shell" && return 1
}
# check extglob flag
function cf_is_extglob_enabled() {
if cf_is_bash >/dev/null; then
shopt -q extglob && echo "true" && return 0
elif cf_is_zsh >/dev/null; then
[[ -o kshglob ]] && echo "true" && return 0
else
echo "unsupported shell" && return 1
fi
echo "false" && return 1
}
# enable extglob
function cf_enable_extglob() {
cf_is_bash >/dev/null && shopt -s extglob && return 0
cf_is_zsh >/dev/null && set -o kshglob && return 0
echo "unsupported shell" && return 1
}
# disable extglob
function cf_disable_extglob() {
cf_is_bash >/dev/null && shopt -u extglob && return 0
cf_is_zsh >/dev/null && unsetopt kshglob && return 0
echo "unsupported shell" && return 1
}
# check pid is exists
function cf_is_pid_exists() {
local pid=$1
[ -z "$pid" ] && echo "false" && return 1
kill -0 $pid >/dev/null 2>&1 && echo "true" && return 0
echo "false" && return 1
}
function cf_is_java() {
local pid=$1
! cf_is_pid_exists >/dev/null $pid && echo "pid:$pid not exists" && return 1
ps -ocommand= -p$pid | awk '$1~/java$/' > /dev/null && echo "true" && return 0
echo "false" && return 1
}
function cf_is_available_port() {
local port=$1
if [[ "$OSTYPE" = *linux* ]];then
local r=$( netstat -ant | awk '$6=="LISTEN" && $4~":'$port'$"' )
elif [[ "$OSTYPE" = *darwin* ]];then
local r=$( netstat -ant | awk '$6=="LISTEN"' | grep "/.$port " )
else
echo "unknown system" && return 1
fi
[ -z "$r" ] && echo "true" && return 0;
echo "false" && return 1 # port has been used
}
function cf_defined() {
if cf_is_bash >/dev/null; then
[[ ${!1-X} == ${!1-Y} ]]
elif cf_is_zsh >/dev/null; then
[[ ${(P)1-X} == ${(P)1-Y} ]]
else
echo "unsupported shell" && return 1
fi
}
function cf_has_value() {
cf_defined $1 || return 1
if cf_is_bash >/dev/null; then
[[ -n ${!1} ]] && return 0
elif cf_is_zsh >/dev/null; then
[[ -n ${(P)1} ]] && return 0
fi
return 1
}
function cf_has_sudo_privilege() {
# do not need password
sudo -n echo >/dev/null 2>&1
}
function cf_timestamp() {
date +%F-%T | tr ':-' '_' #2015_12_01_22_15_22
}
function cf_length() {
echo ${#1}
}
# trim string
function cf_trim() {
if [ -p /dev/stdin ]; then
while IFS='' read line; do
_trim "$line"
done
else
_trim "$1"
fi
}
# private function
function _trim() {
local str="$1"
local extglob=$(cf_is_extglob_enabled)
if cf_is_bash >/dev/null || cf_is_zsh >/dev/null; then
[ $extglob = "false" ] && cf_enable_extglob
str="${str##*( )}"
str="${str%%*( )}"
[ $extglob = "false" ] && cf_disable_extglob
else
echo "unsupported shell" && return 1
fi
echo $str
}
function cf_lower() {
echo "$1" | tr '[:upper:]' '[:lower:]'
}
function cf_upper() {
echo "$1" | tr '[:lower:]' '[:upper:]'
}
function cf_ps_name() {
local pid=$1
! cf_is_pid_exists >/dev/null $pid && echo "pid:$pid not exists" && return 1
if cf_is_java $pid >/dev/null; then
local main=$(cf_ps_java_main $pid)
echo "java($main)"
else
ps -ocommand= -p $pid | awk '{print $1}'
fi
}
function cf_ppid() {
local pid=$1
! cf_is_pid_exists >/dev/null $pid && echo "pid:$pid not exists" && return 1
ps -oppid= -p $pid
}
function cf_ps_java_main() {
local pid=$1
! cf_is_pid_exists >/dev/null $pid && echo "pid:$pid not exists" && return 1
ps -ocommand= -p $pid | tr ' ' '/n' | awk '/-classpath|-cp/{getline;next};/^-/{next}1' | awk 'NR==2'
}
function cf_ps_time() {
local pid=$1
! cf_is_pid_exists >/dev/null $pid && echo "pid:$pid not exists" && return 1
local elapsed="$(ps -oetime= -p $pid | cf_trim)"
local started="$(ps -olstart= -p $pid | cf_trim)"
if [ `cf_is_gnu_date` = "true" ]; then
started=$(date +'%Y-%m-%d %H:%M:%S' -d "$started")
fi
local cpu_time=$(ps -otime= -p $pid | cf_trim)
echo "started from: $started, elapsed: $elapsed, cumulative cpu time: $cpu_time"
}
function cf_ps_zombies() {
ps -opid,state,command -e | awk 'NR==1 || $2=="Z"'
}
function cf_connection_topology() {
local pid=$1
! cf_is_pid_exists >/dev/null $pid && echo "pid:$pid not exists" && return 1
/usr/sbin/lsof -Pan -iTCP -p $pid > /tmp/.$pid.lsof
grep -o "[0-9.:]*->[0-9.:]*" /tmp/.$pid.lsof > /tmp/.$pid.conns
grep "LISTEN" /tmp/.$pid.lsof | awk '$9~/*/{print substr($9,3)}' > /tmp/.$pid.ports
echo "-------------- downstream -------------"
for port in $(cat /tmp/.$pid.ports); do
cf_connection_list_by_port $port | awk '$6=="ESTABLISHED" {print $5}' | cut -d':' -f1 | sort | uniq -c | awk '{print $2"-->localhost:"'$port'" ("$1")"}'
done
echo "-------------- upstream ---------------"
local portsExpr=$(cat /tmp/.$pid.ports | sed -e 's/^/:/' -e 's/$/->/' | xargs | sed 's/ /|/g')
grep -Ev "$portsExpr" /tmp/.$pid.conns > /tmp/.$pid.out
awk -F'->' '{print $2}' /tmp/.$pid.out | sort | uniq -c | sort -nrk1 | awk '{print "localhost-->"$2" ("$1")"}'
rm -f /tmp/.$pid.lsof /tmp/.$pid.conns /tmp/.$pid.ports
}
function cf_connection_list_by_pid() {
local pid=$1
! cf_is_pid_exists >/dev/null $pid && echo "pid:$pid not exists" && return 1
/usr/sbin/lsof -Pan -iTCP -p $pid
}
function cf_connection_list_by_port() {
local port=$1
netstat -ant| awk '$4~/[:.]'"$port"'$/'
}
function cf_connection_stat_by_pid() {
local pid=$1
! cf_is_pid_exists >/dev/null $pid && echo "pid:$pid not exists" && return 1
local interval=${2:-1}
/usr/sbin/lsof -Pan -iTCP -p $pid -r $interval
}
function cf_connection_stat_by_port() {
local port=$1
netstat -ant -c| awk '$1=="Proto"{print "/n"$0};$4~/[:.]'"$port"'$/'
}
function cf_listening_sockets() {
#lsof -Pnl -i4TCP -sTCP:LISTEN #low version unsupported -sTCP params
if cf_is_linux >/dev/null || cf_is_darwin >/dev/null; then
if cf_has_sudo_privilege; then
sudo /usr/sbin/lsof -Pnl -i4TCP | grep LISTEN
else
/usr/sbin/lsof -Pnl -i4TCP | grep LISTEN
fi
else
netstat -plnt 2>/dev/null | grep -v tcp6
fi
}
function cf_traffic_by_eth() {
local eth=${1:-"eth0"}
if cf_is_linux >/dev/null; then
[ ! -d /sys/class/net/$eth ] && echo "network interface not exists." && return 1
while true; do
local r1=`cat /sys/class/net/$eth/statistics/rx_bytes`
local t1=`cat /sys/class/net/$eth/statistics/tx_bytes`
sleep 1
local r2=`cat /sys/class/net/$eth/statistics/rx_bytes`
local t2=`cat /sys/class/net/$eth/statistics/tx_bytes`
local rkbps=`cf_calc "( $r2 - $r1 ) / 1024"`
local tkbps=`cf_calc "( $t2 - $t1 ) / 1024"`
echo "$eth: RX $rkbps kB/s TX $tkbps kB/s"
done
elif cf_is_darwin >/dev/null; then
# `netstat -I eth0 -w 1` or `nettop -n -m tcp`
declare -a tuple
local _i1=0
cf_is_zsh >/dev/null && _i1=1
local _i2=1
cf_is_zsh >/dev/null && _i1=2
while true; do
tuple=( $(netstat -nbi -I $eth | tail -1 | awk '{print $7,$10}') )
local r1=${tuple[$_i1]}
local t1=${tuple[$_i2]}
sleep 1
tuple=( $(netstat -nbi -I $eth | tail -1 | awk '{print $7,$10}') )
local r2=${tuple[$_i1]}
local t2=${tuple[$_i2]}
local rkbps=`cf_calc "( $r2 - $r1 ) / 1024"`
local tkbps=`cf_calc "( $t2 - $t1 ) / 1024"`
echo "$eth: RX $rkbps kB/s TX $tkbps kB/s"
done
else
echo "unsupported os" && return 1
fi
}
function cf_traffic_by_pid() {
! cf_is_linux >/dev/null && echo "only works in linux" && return 1
local pid=$1
! cf_is_pid_exists >/dev/null $pid && echo "pid:$pid not exists" && return 1
# kernel 2.6.18 not support, must 2.6.32 or later?
local pf="/proc/$pid/net/netstat"
[ ! -f $pf ] && echo "$pf not found!" && return 1
declare -a tuple
local _i1=0
cf_is_zsh >/dev/null && _i1=1
local _i2=1
cf_is_zsh >/dev/null && _i1=2
local pname="$(cf_ps_name $pid)"
while true; do
tuple=( $(grep "IpExt: " $pf | awk 'NR==2{print $8,$9}') )
local r1=${tuple[$_i1]}
local t1=${tuple[$_i2]}
sleep 1
tuple=( $(grep "IpExt: " $pf | awk 'NR==2{print $8,$9}') )
local r2=${tuple[$_i1]}
local t2=${tuple[$_i2]}
local rkbps=`cf_calc "( $r2 - $r1 ) / 1024"`
local tkbps=`cf_calc "( $t2 - $t1 ) / 1024"`
echo "$pname: IN $rkbps kB/s OUT $tkbps kB/s"
done
}
function cf_iotop() {
sudo iotop -bod1
}
function cf_check_sum() {
local dir=${1:-$PWD}
local dirsum=0
for sumin $(find ${dir} -type f -print0 | xargs -0 cksum | awk '{print $1}')
do
dirsum=$(( ${sum} + ${dirsum} ))
done
echo ${dirsum}
}
function cf_java_classpath_check() {
[ $# -eq 0 ] && echo "please enter classpath dir" && return 1
[ ! -d "$1" ] && echo "not a directory" && return 1
local tmpfile="/tmp/.cp$(date +%s)"
local tmphash="/tmp/.hash$(date +%s)"
local verbose="/tmp/cp-verbose.log"
if cf_is_zsh >/dev/null;then
local -a files
local begin=1
elif cf_is_bash >/dev/null;then
declare -a files
local begin=0
else
echo "unsupported shell" && return 1
fi
files=(`find "$1" -name "*.jar"`)
for f in $files; do
jarName=`basename $f`
list=`unzip -l $f | awk -v fn=$jarName '//.class$/{print $NF,fn}'`
size=`echo "$list" | wc -l`
echo $jarName $size >> $tmphash
echo "$list"
done | sort | awk 'NF{ a[$1]++;m[$1]=m[$1]","$2}END{for(i in a) if(a[i] > 1) print i,substr(m[i],2)}' > $tmpfile
awk '{print $2}' $tmpfile | awk -F',' '{i=1;for(;i<=NF;i++) for(j=i+1;j<=NF;j++) print $i,$j}' | sort | uniq -c | sort -nrk1 |
while read line; do
local dup=${line%% *}
local jars=${line#* }
local jar1=${jars% *}
local jar2=${jars#* }
local len_jar1=`grep -F "$jar1" $tmphash | grep ^"$jar1" | awk '{print $2}'`
local len_jar2=`grep -F "$jar2" $tmphash | grep ^"$jar2" | awk '{print $2}'`
local len=$(($len_jar1 > $len_jar2 ? $len_jar1 : $len_jar2))
local per=$(echo "scale=2; $dup/$len" | bc -l)
echo ${per/./} $dup $jar1 $jar2
done | sort -nr -k1 -k2 | awk 'NR==1{print "Similarity DuplicateClasses File1 File2"}{print "%"$0}'| column -t
sort $tmpfile | awk '{print $1,"/n/t/t",$2}' > $verbose
echo "See $verbose for more details."
rm -f $tmpfile
rm -f $tmphash
}
function cf_java_class_find() {
local libdir=$1
local name=$2
local glob=$(cf_is_glob_enabled)
[ $glob = "false" ] && cf_enable_glob
builtin pushd $libdir >/dev/null
for j in *.jar; do
unzip -l $j | grep $name && echo $j;
done
builtin popd >/dev/null
[ $glob = "false" ] && cf_disable_glob
}
function cf_java_pids() {
ps x | grep "jav[a]" | awk '{print $1}'
}
function cf_java_infos() {
for p in `cf_java_pids`; do
echo "java pid: $p"
info=`ps -opid=,command= -p $p | tr ' ' '/n' | awk '/-classpath|-cp/{getline;next};/-Xmx|-Dcatalina.base/{print};/^-/{next};1' | xargs`
echo "$info"
time=`cf_ps_time $p`
echo "$time"
done
}
function cf_java_threads() {
local pid=$1
local vm_threads="GC task|VM |CompilerThread|Finalizer|Reference Handler|Signal Dispatcher"
"$JAVA_HOME"/bin/jstack $pid | grep "^/"" | grep -Ev "$vm_threads"
}
function cf_java_sysprops() {
local pid=$1
! cf_is_pid_exists >/dev/null $pid && echo "pid:$pid not exists" && return 1
"$JAVA_HOME"/bin/jinfo -sysprops $pid
}
function cf_jstack_series() {
local pid=$1
! cf_is_pid_exists >/dev/null $pid && echo "pid:$pid not exists" && return 1
local count=${2:-5}# defaults 5 times
local delay=${3:-0.5} # defaults 0.5 seconds
local logdir=${LOG_DIR:-"/tmp"}
while [ $count -gt 0 ]; do
if cf_is_gnu_date >/dev/null; then
local suffix=$(date +%H%M%S.%N)
else
local suffix=$(date +%H%M%S)"."$count
fi
"$JAVA_HOME"/bin/jstack $pid > $logdir/jstack.$pid.$suffix
sleep $delay
let count--
echo -n "."
done
}
function cf_dmesg() {
! cf_is_linux >/dev/null && echo "only works in linux" && return 1
dmesg -T "$@" 2>/dev/null
[ $? -eq 0 ] && return 0
dmesg "$@" | perl -w -e 'use strict;
my ($uptime) = do { local @ARGV="/proc/uptime";<>}; ($uptime) = ($uptime =~ /^(/d+)/./);
foreach my $line (<>) {
printf( ($line=~/^/[/s*(/d+)/./d+/](.+)/) ? ( "[%s]%s/n", scalar localtime(time - $uptime + $1), $2 ) : $line )
}'
}
function cf_trace_http_request() {
! cf_is_linux >/dev/null && echo "only works in linux" && return 1
local pid=$1
! cf_is_pid_exists >/dev/null $pid && echo "pid:$pid not exists" && return 1
strace -e read -s 2000 -qftp $pid 2>&1 | grep " HTTP/1[.][01][/]r[/]n"
}
function cf_trace_http_response() {
! cf_is_linux >/dev/null && echo "only works in linux" && return 1
local pid=$1
! cf_is_pid_exists >/dev/null $pid && echo "pid:$pid not exists" && return 1
strace -e write -s 2000 -qftp $pid 2>&1 | grep "HTTP/1[.][01] "
}
function cf_trace_http_req_header() {
! cf_is_linux >/dev/null && echo "only works in linux" && return 1
local pid=$1
! cf_is_pid_exists >/dev/null $pid && echo "pid:$pid not exists" && return 1
strace -e read -s 2000 -qftp $pid 2>&1 | grep " HTTP/1[.][01][/]r[/]n" | sed's///r//n//n/g'
}
function cf_trace_http_resp_header() {
! cf_is_linux >/dev/null && echo "only works in linux" && return 1
local pid=$1
! cf_is_pid_exists >/dev/null $pid && echo "pid:$pid not exists" && return 1
strace -e write -s 2000 -qftp $pid 2>&1 | grep "HTTP/1[.][01] " | sed 's///r//n//n/g'
}
function cf_trace_http_invoke() {
! cf_is_linux >/dev/null && echo "only works in linux" && return 1
local pid=$1
! cf_is_pid_exists >/dev/null $pid && echo "pid:$pid not exists" && return 1
strace -e sendto -s 2000 -qftp $pid 2>&1 | grep " HTTP/1[.][01][/]r[/]n"
}
function cf_trace_connect() {
! cf_is_linux >/dev/null && echo "only works in linux" && return 1
local pid=$1
! cf_is_pid_exists >/dev/null $pid && echo "pid:$pid not exists" && return 1
strace -e connect -s 2000 -qftp $pid 2>&1 | grep "port"
}
function cf_trace_socket() {
! cf_is_linux >/dev/null && echo "only works in linux" && return 1
local pid=$1
! cf_is_pid_exists >/dev/null $pid && echo "pid:$pid not exists" && return 1
strace -e connect,socket,close -s 2000 -qftp $pid 2>&1 | grep "port"
}
function cf_trace_sql_select() {
! cf_is_linux >/dev/null && echo "only works in linux" && return 1
local pid=$1
! cf_is_pid_exists >/dev/null $pid && echo "pid:$pid not exists" && return 1
strace -e sendto,write -s 2000 -qftp $pid 2>&1 | grep -i "[/]3select"
}
function cf_trace_sql_update() {
! cf_is_linux >/dev/null && echo "only works in linux" && return 1
local pid=$1
! cf_is_pid_exists >/dev/null $pid && echo "pid:$pid not exists" && return 1
strace -e sendto,write -s 2000 -qftp $pid 2>&1 | grep -i "[/]3update"
}
function cf_trace_sql_insert() {
! cf_is_linux >/dev/null && echo "only works in linux" && return 1
local pid=$1
! cf_is_pid_exists >/dev/null $pid && echo "pid:$pid not exists" && return 1
strace -e sendto,write -s 2000 -qftp $pid 2>&1 | grep -i "[/]3insert"
}
function cf_trace_redis_command() {
! cf_is_linux >/dev/null && echo "only works in linux" && return 1
local pid=$1
! cf_is_pid_exists >/dev/null $pid && echo "pid:$pid not exists" && return 1
local cmd=$2
strace -e sendto,write -s 2000 -qftp $pid 2>&1 | grep -i "$cmd[/]r[/]n"
}
function cf_trace_dubbo_request() {
! cf_is_linux >/dev/null && echo "only works in linux" && return 1
local pid=$1
! cf_is_pid_exists >/dev/null $pid && echo "pid:$pid not exists" && return 1
strace -e read -s 2000 -qftp $pid 2>&1 | grep -i "[/]tinterface"
}
function cf_trace_dubbo_invoke() {
! cf_is_linux >/dev/null && echo "only works in linux" && return 1
local pid=$1
! cf_is_pid_exists >/dev/null $pid && echo "pid:$pid not exists" && return 1
strace -e write -s 2000 -qftp $pid 2>&1 | grep -i "[/]tinterface"
}
function cf_trace_system_call() {
! cf_is_linux >/dev/null && echo "only works in linux" && return 1
local pid=$1
! cf_is_pid_exists >/dev/null $pid && echo "pid:$pid not exists" && return 1
local time=${2:-5}
local outfile="/tmp/.sys-call.$pid"
strace -cqftp $pid -o $outfile &
local spid=$!
while [ $time -gt 0 ]; do
sleep 1
let time--
echo -n "."
done
echo ""
kill $spid && echo "ok"
# if strace process still exists
cf_is_pid_exists $spid >/dev/null 2>&1 && kill -9 $spid
cat $outfile && rm -f $outfile
}
function cf_random_entropy_stat() {
! cf_is_linux >/dev/null && echo "only works in linux" && return 1
while true; do
echo "entropy available:" `cat /proc/sys/kernel/random/entropy_avail`
sleep 1
done
}
function cf_json_fmt() {
python -mjson.tool
}
function cf_http_server() {
local port=${1:-8000}
python -mSimpleHTTPServer $port 2>/dev/null
}

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