I premise that i'm at the very first arms about this.
I'm trying to create a script that, when twice in a row, detects a % of cpu in use higher than 70%, it kills all the screens and python processes.
For how the script is currently, I do not get errors but I know that it does not work as it should.
Could someone help me?
#!/bin/bash
clear
a=0
b=2
now=$(date +"%T")
echo [$now] Start
while :
do ###i take this 3 line online to check the cpu usage %
cores=$(nproc)
load=$(awk '{print $3}'< /proc/loadavg)
usage=$(echo | awk -v c="${cores}" -v l="${load}" '{print l*100/c}' | awk -F. '{print $1}')
if [[ ${usage} -ge 70 ]];
then
let "a += 1"
if [[ "$a" -eq "$b" ]];
then
echo
echo ============================================
echo
now=$(date +"%T")
echo -e "\e[33m[$now]\e[39m" CPU usage "\e[33m[$usage]\e[39m"
echo
let "a=0"
echo pkill screen ###this 2 command is what i need to do
echo pkill python ###when the cpu is higher than 70%
echo
echo "processi chiusi"
echo ============================================
sleep 15
else
echo
echo ============================================
echo
echo
echo
now=$(date +"%T")
echo -e "\e[33m[$now]\e[39m" CPU usage "\e[33m[$usage]\e[39m"
echo
echo ============================================
sleep 15
fi
else
echo
echo
echo
echo ============================================
echo
now=$(date +"%T")
echo -e "\e[33m[$now]\e[39m" CPU usage "\e[33m[$usage]\e[39m"
let "a=0"
echo
echo "contatore: "
echo "[$a]"
echo ============================================
sleep 15
fi
done
Related
Here is my code:
while [[ "$counter" -gt 0 ]];
do
startNewTest
echo -e "\n" | ./myscript.sh send
while :
do
sleep 30
echo -e "\n Reading status... \n"
./myscript.sh status | \
while read i
do
if echo $i | grep -q "$KEYWORD"
then
echo -e "\n Starting a new round of test... \n"
break 2
fi
done
done
let counter=counter-1
done
When the if condition is met, the "break 2" line should break 2 layers of loop, right? However, when i ran the script, it only break the inner-most loop, and stuck inside the infinite "while :" loop. Where did i make the mistake?
I also tried "break 3", didn't work either.
Can you test this with your myscript.sh ?
It seems you are breaking out of a subprocess after the pipe sign.
Getting the output in the while-loop without a subprocess might help:
while [[ "$counter" -gt 0 ]];
do
startNewTest
echo -e "\n" | ./myscript.sh send
while :
do
sleep 30
echo -e "\n Reading status... \n"
while read i
do
if echo $i | grep -q "$KEYWORD"
then
echo -e "\n Starting a new round of test... \n"
break 2
fi
done < <(./myscript.sh status)
done
let counter=counter-1
done
I have a bash script that asks the user for their details.
I'm setting a limit to how long we wait for the input. I've found this and it appears to what I want.
timelimit=5
echo -e " You have $timelimit seconds\n Enter your name quickly: \c"
name=""
read -t $timelimit name
#read -t $timelimit name <&1
# for bash versions bellow 3.x
if [ ! -z "$name" ]
then
echo -e "\n Your name is $name"
else
echo -e "\n TIME OUT\n You failed to enter your name"
fi
It shows "You have 5 seconds..." any way to update the output so it shows 4,3,2,1 etc as it counts down ?
Thanks
I have tried most of these answers and none of them worked perfectly for me.
Been playing with this for a local developer deployment script.
This solves a few of the issues noted, like including printed output, etc.
Also wrapped as a function for portability. I'm keen to see any improvements.
Here is my solution:
#!/bin/bash
# set -euo pipefail
READTIMEOUT=5
function read_yn {
MESSAGE=$1
TIMEOUTREPLY=$2
NORMALREPLY="Y"
if [ -z "${TIMEOUTREPLY}" ]; then
TIMEOUTREPLY="Y"
fi
TIMEOUTREPLY_UC=$( echo $TIMEOUTREPLY | awk '{print toupper($0)}' )
TIMEOUTREPLY_LC=$( echo $TIMEOUTREPLY | awk '{print tolower($0)}' )
if [ "${TIMEOUTREPLY_UC}" == "Y" ]; then
NORMALREPLY="N"
fi
NORMALREPLY_UC=$( echo $NORMALREPLY | awk '{print toupper($0)}' )
NORMALREPLY_LC=$( echo $NORMALREPLY | awk '{print tolower($0)}' )
for (( i=$READTIMEOUT; i>=0; i--)); do
printf "\r${MESSAGE} [${NORMALREPLY_UC}${NORMALREPLY_LC}/${TIMEOUTREPLY_UC}${TIMEOUTREPLY_LC}] ('${TIMEOUTREPLY_UC}' in ${i}s) "
read -s -n 1 -t 1 waitreadyn
if [ $? -eq 0 ]
then
break
fi
done
yn=""
if [ -z $waitreadyn ]; then
echo -e "\nNo input entered: Defaulting to '${TIMEOUTREPLY_UC}'"
yn="${TIMEOUTREPLY_UC}"
else
echo -e "\n${waitreadyn}"
yn="${waitreadyn}"
fi
}
read_yn "TESTING" "y"
GIST: https://gist.github.com/djravine/7a66478c37974940e8c39764d59d35fa
LIVE DEMO: https://repl.it/#DJRavine/read-input-with-visible-countdownsh
This should work and shouldn't overwrite input, bit more long winded than the other solutions.
#!/bin/bash
abend()
{
stty sane
exit
#Resets stty and then exits script
}
DoAction(){
stty -echo
#Turn off echo
tput sc
#Save cursor position
echo -ne "\033[0K\r"
# Remove previous line
tput cuu1
#Go to previous line
tput el
#clear to end of line
echo "You have $(($time-$count)) seconds"
#Echo timer
echo -n "$Keys"
#Echo currently typed text
stty echo
#turn echo on
tput rc
#return cursor
}
main()
{
trap abend SIGINT # Trap ctrl-c to return terminal to normal
stty -icanon time 0 min 0 -echo
#turn of echo and set read time to nothing
keypress=''
time=5
echo "You have $time seconds"
while Keys=$Keys$keypress; do
sleep 0.05
read keypress && break
((clock = clock + 1 ))
if [[ clock -eq 20 ]];then
((count++))
clock=0
DoAction $Keys
fi
[[ $count -eq $time ]] && echo "you have run out of time" && abend
done
stty sane
echo Your username was $Keys
echo "Thanks for using this script."
exit 0
}
main
This seems to work:
$ cat test.sh
total=5 # total wait time in seconds
count=0 # counter
while [ ${count} -lt ${total} ] ; do
tlimit=$(( $total - $count ))
echo -e "\rYou have ${tlimit} seconds to enter your name: \c"
read -t 1 name
test ! -z "$name" && { break ; }
count=$((count+1))
done
if [ ! -z "$name" ] ; then
echo -e "\nyour name is $name"
else
echo -e "\ntime out"
fi
#!/bin/bash
timelimit=6
name=""
for (( i = 1 ; i <= $timelimit; i++ )); do
echo -ne "\rYou have $(expr $timelimit - $i) seconds. Enter your name quickly: \c"
[ ! -z "$name" ] && { break ; }
read -t 1 name
done
if [ -z "$name" ]; then
echo -e "\n TIME OUT\n You failed to enter your name"
else
echo -e "\n Your name is $name"
fi
this should work
This works fine and fast for me:
#!/bin/bash
#Sets starttimestamp
starttime=$(date +%s)
#Sets timeout
timeout=5
#sets successflag default to false
success=false
#Save Cursorposition
echo -n -e "\033[s"
#While time not up
while [ $(($starttime+$timeout)) -gt $(date +%s) ] ; do
#Return to saved Cursorpositon
echo -n -e "\033[u"
#Display time left
echo "$(((starttime+timeout)-$(date +%s))) seconds left"
#Ask for 1 char then go on in loop make it look like an ongoing input by adding the user variable to the prompt
if read -p foo="Username: $user" -n 1 -t 1 c ; then
#If user hits return in time c will be empty then break out of loop and set success true
if [[ $c == "" ]] ; then
success=true
break
fi
# Append latest character to user variable
user=${user}${c}
unset c
fi
done
if $success ; then
echo "Yiha!"
else
echo "Too late!"
fi
I have shell Script written which does a job of comparing two files and and gives me result in a HTML format for defects. But i want to improve it so that i can only get modified files defects instead of legacy defects also. I am using this script to get Coverity report.
while read line; do
n=$((++n))
if echo $line | grep '^[[:space:]]*>' &>/dev/null; then
if [ $(($n % 2)) -eq 1 ]; then
# TODO somehow get proper defect number from html
# echo "Defect num: $(($n/2 + 1))"
def_num=$((++def_num))
fi
echo $line | sed -n -e 's/>[[:space:]]*\(.*\)/\1/p'
if [ $(($n % 2)) -eq 0 ]; then
echo "-------------------------------"
fi
done < <(diff -y -W 200 ./cov-results-base/result.filt ./cov-results-changed/result.filt)
echo "==============================="
echo
echo "Number of defects in old code: $(tac cov-results-base/summary.xml |
sed -n '/num/{s|<num>\(.*\)</num>|\1|p; q;}')"
echo "Number of defects in new code: $(tac cov-results-changed/summary.xml |
sed -n '/num/{s|<num>\(.*\)</num>|\1|p; q;}')"
This enables you to get the last modification time of a file and the compare with the current time.
now=`date +%s`
modified=`stat -c "%Y" $file`
if [ $(($now-$modified)) -gt 0 ]; then
echo "not modified";
else
echo "modified";
fi
I hope that this is what you wanted.
We have to cache quite a big database of data after each upload, so we created a bash script that should handle it for us. The script should start 4 paralel curls to the site and once they're done, start the next one from the URL list we store in the file.
In theory everything works ok, and the concept works if we run the run 4 processes from our local machines to the target site.
If i set the MAX_NPROC=1 the curl takes as long as it would if the browser hits the URL
i.e. 20s
If I set the MAX_NPROC=2 the time request took, triples.
Am I missing something? Is that an apache setting that is slowing us down? or is this a secret cURL setting that I'm missing?
Any help will be appreciated. Please find the bash script below
#!/bin/bash
if [[ -z $2 ]]; then
MAX_NPROC=4 # default
else
MAX_NPROC=$2
fi
if [[ -z $1 ]]; then
echo "File with URLs is missing"
exit
fi;
NUM=0
QUEUE=""
DATA=""
URL=""
declare -a URL_ARRAY
declare -a TIME_ARRAY
ERROR_LOG=""
function queue {
QUEUE="$QUEUE $1"
NUM=$(($NUM+1))
}
function regeneratequeue {
OLDREQUEUE=$QUEUE
echo "OLDREQUEUE:$OLDREQUEUE"
QUEUE=""
NUM=0
for PID in $OLDREQUEUE
do
process_count=`ps ax | awk '{print $1 }' | grep -c "^${PID}$"`
if [ $process_count -eq 1 ] ; then
QUEUE="$QUEUE $PID"
NUM=$(($NUM+1))
fi
done
}
function checkqueue {
OLDCHQUEUE=$QUEUE
for PID in $OLDCHQUEUE
do
process_count=`ps ax | awk '{print $1 }' | grep -c "^${PID}$"`
if [ $process_count -eq 0 ] ; then
wait $PID
my_status=$?
if [[ $my_status -ne 0 ]]
then
echo "`date` $my_status ${URL_ARRAY[$PID]}" >> $ERROR_LOG
fi
current_time=`date +%s`
old_time=${TIME_ARRAY[$PID]}
time_difference=$(expr $current_time - $old_time)
echo "`date` ${URL_ARRAY[$PID]} END ($time_difference seconds)" >> $REVERSE_LOG
#unset TIME_ARRAY[$PID]
#unset URL_ARRAY[$PID]
regeneratequeue # at least one PID has finished
break
fi
done
}
REVERSE_LOG="$1.rvrs"
ERROR_LOG="$1.error"
echo "Cache STARTED at `date`" > $REVERSE_LOG
echo "" > ERROR_LOG
while read line; do
# create the command to be run
DATA="username=user#server.com&password=password"
URL=$line
CMD=$(curl --data "${DATA}" -s -o /dev/null --url "${URL}")
echo "Command: ${CMD}"
# Run the command
$CMD &
# Get PID for process
PID=$!
queue $PID;
URL_ARRAY[$PID]=$URL;
TIME_ARRAY[$PID]=`date +%s`
while [ $NUM -ge $MAX_NPROC ]; do
checkqueue
sleep 0.4
done
done < $1
echo "Cache FINISHED at `date`" >> $REVERSE_LOG
exit
The network is almost always the bottleneck. Spawning more connections usually makes it slower.
You can try to see if parallel'izing it will do you any good by spawning several
time curl ...... &
I'm trying to write a bash script and I needed to do some floating point math. Basically I want to do something like this:
NUM=$(echo "scale=25;$1/10" | bc)
if [ $? -ne 0 ]
then
echo bad
fi
The problem I'm running into is $? tends to hold the output from the echo program and not the bc call. Is there a way I save the output from the bc program into a variable?
EDIT:
Thanks for the quick replies. Here's another way of looking at the problem. Say I modified the script a little bit so it looks like this:
#!/bin/bash
NUM=$(echo "scale=25;$1/10" | bc)
if [ $? -ne 0 ]
then
echo bad
exit
fi
echo "$NUM"
When the user inputs a normal floating point value, it works fine:
bash script.sh 1.0
output:
.1000000000000000000000000
However, when the user enters an incorrect value, the script can't recover:
bash script.sh 1.0a
output:
(standard_in) 1: parse error
What I'm trying to do is get it to exit gracefully.
I don't see anything wrong. $NUM is supposed to hold your bc command results
see:
NUM=$(echo "scale=25;$1/10" | bc)
echo "\$? is $?"
echo "NUM is $NUM"
output
$ ./shell.sh 10
$? is 0
NUM is 1.0000000000000000000000000
another way is to use awk
NUM=$(awk -vinput="$1" 'BEGIN{printf "%.25f", input/10 }')
echo "\$? is $?"
echo "NUM is $NUM"
The other way, is to do the check of "$1" before you pass to bc. eg
shopt -s extglob
input="$1"
case "$input" in
+([0-9.]))
IFS="."; set -- $input
if [ $# -ne 2 ];then
echo "bad decimal"
else
NUM=$(echo "scale=25;$1/10" | bc )
echo "$NUM"
fi
esac
you don't have to check for $? from bc anymore
For GNU bc, an error similar to "(standard_in) 1: syntax error" will be output on stderr. You can capture this in your variable and check for it.
#!/bin/bash
NUM=$(echo "scale=25;$1/10" | bc 2>&1)
if [[ $NUM =~ error || $? -ne 0 ]]
then
echo bad
exit
fi
echo "$NUM"
Are you after the result of calculation from bc (which you store in NUM) or the status return from the system call?
As I said you have the result of calculation in $NUM:
#bctest.sh
NUM=$(echo "scale=25;$1/10" | bc)
if [ $? -ne 0 ]
then
echo bad
fi
echo "result: ", $NUM
Test:
bash ./bctest.sh 15
result: , 1.5000000000000000000000000