I have a bash lopp as #!/bin/bash for (( c=0; c<=1000000; c++ )) do SOME STUFF HERE done I interrupt the long loop by a keyboard input like Ctrl+C but Ctrl+C simply terminates the script. I am looking for an alternative to continue the current cycle and break the loop after finishing the running STUFF in the current cycle.

I'm not an experienced programmer. So maybe it's obvious for you why the break command in this script does not terminate the loop, but I can't see what is causing the problem. I want to use the script to mount a VHD file to the first empty NBD "slot" (which is assumed when it's size is zero, I took this idea from another thread on this site).

function vhdmount() {
 workfile="$1"
 if test -e "$workfile"
 then
  workname=${workfile##*'/'}
  echo "$(tput setaf 3)*** ${workfile}: ***$(tput setaf 7)"
  for (( i=0; i<16; i++ ))
  do (
   if test -e /sys/class/block/nbd${i}/size
   then
    usedornot=$( cat /sys/class/block/nbd${i}/size )
    if (( "$usedornot" == 0 ))
    then
     firstfree=$i
     break
    fi
   else
    firstfree=$i
    break
   fi
  ); done
  sudo modprobe nbd
  sudo qemu-nbd -c /dev/nbd${firstfree} "$workfile"
  sudo mkdir "/media/myusername/${workname//.vhd/.nbd${firstfree}}/"
  sudo mount /dev/nbd${firstfree}p1 "/media/myusername/${workname//.vhd/.nbd${firstfree}}/"
  echo "$(tput setaf 3)    successfully mounted.$(tput setaf 7)"
 fi
}

vhdmount "$1"

Maybe there are other errors as well. I'm always terminating the shell when it asks for the password, because I can tell from the 16 messages telling me that a break command is only useful in a for loop that the break command did not work. By the way, what a useless error message is that?!

I am trying to read a variable with spaces on prompt and trying to use in a for loop., For example:

Enter the items to read separated by space...  
apple orange kiwi

read items  

for i in "$items"  
do  
echo $i  
...(additional operations)....  
done

But shell does take the first item - apple here. What am I missing here.

Imagine I have two folders in my current working directory: back/ and front/. I am trying to enter inside each of them and do some stuff. From the simple script below:

-shell
for dir in */ ; do
    echo "$(dir)"
done

I was expecting an output like:

back
front

However, what I am getting is:

back  front
back  front

I don't understand. The consequence is that, if I try to cd into the folder:

-shell
for dir in */ ; do
    echo "$(dir)"
    cd $(dir)
    echo "$(pwd)"
    cd ..
done

I get:

back  front
/path/to/back
back  front
/path/to/back

I.e. I never enter front/. Could someone please help me understand what I am doing wrong?

I am looking for a possibility to catch in a repeating text pattern all variable amount of lines between them and then do an action with it in bash. Example text:

Total:
text1
text2
Total:
text3
Total:
Text1
Text4
Text5

What I am aiming to do is basically a for loop over the matches with Total: and then do an action with it, which is always going to be the first section of the follow-up subtext. Something like in high level language: for (cat filename = every "Total:" do end Now the interesting part for me is basically how to organize that for loop? In the ` part I want do some jq and awk`. The results would be basically based on the example text these three matches: 1.

Total:
text1
text2

2.

Total:
text3

3.

Total:
Text1
Text4
Text5

Hope the last description describes it. What could be the right tool for catching this? Would that be rather a combination of for and grep or for and awk? I would like to use no more than GNU tools. So no perl or other external tools. Thanks a lot.

I have several servers which have several files with deploy date info I need to parse, and get a local copy of the files which are 2 months old or older.

#!/bin/bash

# split on new line not space
# don't want to quote everything
# globbing desired
IFS=$'\n'

servers=(
  blue
  red
)

parseDate() {
    grep 'deploy_date:' $file | \
    sed  ...                  | \
    # much more in here...
}

getOldFiles() {
    local #all vars
    currentDateInSecs=$(date +%s)
    twoMonthsInSecs=526000
    for server in ${servers[@]}; do
        oldfile=$(
          ssh $server "
            $(declare -f parseDate)
            for file in /dir/$server/file*; do
                dateInSecs=$(date -jf '%b/%e/%Y' $(parseDate) +%s)
                timeDiff=$((\$currentDateInSecs - \$dateInSecs))
                ((\$timeDiff >= \$twoMonthsInSecs)) &&
                    cat \$file
            done
          "
        )
        [ -n $oldFile ] &&
            cat $oldFile ~/oldFiles/${server}-${file}.txt
    done

### Problem: Current issue is with dateInSecs=$(date -jf '%b/%e/%Y' $(parseDate \$file) +%s). When parseDate \$file is in $() the $file variable is not expanded, it works fine without command substitution, but I need it. How do I fix this? ### Info: This isn't a script, they're in my ~/.bash_profile This is a script (among other scripts) in a git repo which is sourced from ~/bash_profile (I have an install script which sets sources using $PWD) so people can use these commands directly instead of cd'ing to the git repo (which has many other things not applicable to the them). Runs from Macos to CentOS servers.

If I ls files without a for loop in a remote host everything is fine however, if I capture the ls in a variable and try to echo each file it fails as the variables don't expand/have a value. What I mean:

IFS=$'\n'
servers=(
  blue
  green
  red
)

for i in ${servers[@]}; do 
   ssh $i "
     ls /dir/xyz_${i}*/details.txt
   "
done
/dir/xyx_blue0/details.txt 
/dir/xyz_blue1/details.txt
/dir/xyx_green2/details.txt 
/dir/xyz_green4/details.txt
/dir/xyx_red1/details.txt 
/dir/xyz_red8/details.txt

But I actually need to loop through the output of ls so I can do things to the files, however the variable doesn't expand:

for i in ${servers[@]}; do 
   ssh $i "
     for i in $(ls /dir/xyz_${i}*/details.txt); do 
        echo $i
     done
   "
done
not found: /dir/xyx_blue*/details.txt 
not found: /dir/xyx_green*/details.txt 
not found: /dir/xyx_red*/details.txt

How can I get $i to expand when running a loop on the remote host?

How can I use this shell script with for loop and an array. I would like to call create condition for quality gate creation of sonarqube with a for loop. Example:

#!/bin/bash --login

echo "Creating SonarQube Gateway Condition"

QG_ID=$(cat qualitygate.json | jq -r ".id")
Gateway="curl -u ${USERNAME}:${PASSWORD} -k -X POST "${SONAR_HOST_URL}/api/qualitygates/create_condition?"
declare -a gateMetrics=("gateId=$QG_ID&metric=coverage&op=LT&error=80\"" "gateId=$QG_ID&metric=duplicated_lines_density&op=GT&error=10\"")

for val in "${gateMetrics[@]}"
do
  echo $Gateway$val
done

I want the output as below after running above command

curl -u ${USERNAME}:${PASSWORD} -k -X POST "${SONAR_HOST_URL}/api/qualitygates/create_condition?gateId=$QG_ID&metric=coverage&op=LT&error=80"

I have a python program that requires 2 arguments input-file and output-file. It reads input-file and creates a copy of that file with some modifications in the output-file. I created a text file with a set of arguments. It has multiple sets of arguments on multiple lines. But for 1 execution of a program it needs to read line by line. So each line has 2 args (separated by a space) to be passed: input-file and output-file. Example of file with arguments (call it *File-With-Multiple-Arguments-Per-Line.txt*): input-file-1-path/input-file-1-name.sql output-file-1-path/output-file-1-name.sql input-file-2-path/input-file-2-name.sql output-file-2-path/output-file-2-name.sql input-file-3-path/input-file-3-name.sql output-file-3-path/output-file-3-name.sql input-file-4-path/input-file-4-name.sql output-file-4-path/output-file-4-name.sql I tried this: for arg in $(` But using "$arg" "$arg" leads to incorrect interpretation of my program. As if does the same task 3 times - first time does what is intended; second time using input-file as output and input; third time using output-file as output and input. I've tried the solution below as well, but then my program does not do anything. Though it displays the output in my terminal as if it did what was supposed to be done. And no error appears. For reference: https://unix.stackexchange.com/questions/429834/reading-multiple-arguments-for-a-shell-script-from-file while read x y; do python /Users/Git-Repos/MyProgram.py "$x" "$y" done < /Users/Repository/File-With-Multiple-Arguments-Per-Line.txt

In csh: How do I redirect the output from a foreach-loop to a pipe? This works but uses a temp file: set tmpfile=/tmp/file true > $tmpfile foreach v (set | awk -e '{print $1}' |grep -v prompt2); eval if'($?'$v' && ${#'$v'} > $tmpfile eval if'($?'$v' && ${#'$v'} > 1) echo array'$v'="$'$v'"' >> $tmpfile end cat $tmpfile | parallel --shellquote | perl -pe 's/^scalar(\S+).=/set $1=/ or s/^array(\S+).=(.*)/set $1=($2)/;' I would like to get rid of the temp file and use a pipe instead. So something like this (does not work): ( foreach v (set | awk -e '{print $1}' |grep -v prompt2); eval if'($?'$v' && ${#'$v'} 1) echo array'$v'="$'$v'"' end ) | parallel --shellquote | perl -pe 's/^scalar(\S+).=/set $1=/ or s/^array(\S+).=(.*)/set $1=($2)/;'

I have a bash script that checks ping for 163 sites(stores around the country), which is this: #!/bin/bash #storestest.sh #version 0.9.2 clear; printf "Check stores procedure started; date +"%d/%m/%Y %H:%M:%S"\n"; declare -a STORESITE=($(cat 'stores.txt' | awk -F, '{print $1}')); # Declaring an array and populated by the file stores.txt declare -i UP=0; # Create a variable to serve as a counter for stores that are up declare -i DOWN=0; # Create a variable to serve as a counter for stores that are down touch storesdown.txt; # Create a file if does not exist to store the list of the store the stores that are down printf "" > storesdown.txt; # Clear the contents of the file touch storesup.txt; # Create a file if does not exist to store the list of the store the stores that are up printf "" > storesup.txt; # Clear the contents of the file whiptail --title "Testing stores connectivity" --backtitle "Store Test" --yes-button "OK" --no-button "Cancel" --yesno "Check stores procidure has started" 10 50 if [ $? -ne 0 ]; then exit; fi for i in "${STORESITE[@]}" ; do ping -c 3 $i > /dev/null 2> /dev/null; if [ $? -eq 0 ]; then echo "$i is up" >> storesup.txt; let UP++ sleep 1 else echo "$i is down" >> storesdown.txt; let DOWN++ sleep 1 fi printf "Total: $UP are online and $DOWN are off line.\r"; done echo "Total: $UP are online and $DOWN are off line."; exit; The above script is working fine but I decided to make it a bit fancier by adding a gauge to show the total progress of it. So here is what I did next: #!/bin/bash #storestest.sh #version 0.9.3 clear; printf "Check stores procedure started; date +"%d/%m/%Y %H:%M:%S"\n"; declare -a STORESITE=($(cat 'stores.txt' | awk -F, '{print $1}')); # Declaring an array and populated by the file stores.txt declare -i UP=0; # Create a variable to serve as a counter for stores that are up declare -i DOWN=0; # Create a variable to serve as a counter for stores that are down touch storesdown.txt; # Create a file if does not exist to store the list of the store the stores that are down printf "" > storesdown.txt; # Clear the contents of the file touch storesup.txt; # Create a file if does not exist to store the list of the store the stores that are up printf "" > storesup.txt; # Clear the contents of the file whiptail --title "Testing stores connectivity" --backtitle "Store Test" --yes-button "OK" --no-button "Cancel" --yesno "Check stores procidure has started" 10 50 if [ $? -ne 0 ]; then exit; fi total="${#STORESITE[*]}"; { for ((g = 0; g /dev/null 2> /dev/null; if [ $? -eq 0 ]; then echo "$i is up" >> storesup.txt; let UP++ sleep 2 else echo "$i is down" >> storesdown.txt; let DOWN++ sleep 2 fi printf "Total: $UP are online and $DOWN are off line.\r"; done sleep 1 echo $g done } | whiptail --gauge "Please wait" 6 60 0 echo "Total: $UP are online and $DOWN are off line."; exit; Which does not work as I thought it should be.... That was the best way I could think and write to make at least the whiptail work, but apparently what it happens is to skip the nested loop. P.S I know some of my coding is obsolete and old fashion way of bash scripting.

I have a variable that contains a list of strings, one per line, to be looped over in a for...in...do...done command. I move regularly between bourne shell and zsh. As far as I can understand it, zsh doesnt by default split words out of a a string at newline or whitespace; bourne shell does. So commands like for list_item in $list; do... fail in zsh whereas they'd work in bourne shell, or with literal text rather than variable. Ive tried playing with IFS= in the command, and quoting the variable, but can't seem to make progress. Is there a single syntax for a loop over the words/lines in the string, that will work unmodified in both shells, for ease? if not, what's best practice?

For example, in this for loop

for var in ?????
do
    dummy command
done

I would like to be able to loop through each directory in the one that I am currently in, but it will be an unknown list of directories so I can't write every single one into where the question marks are. Any help is appreciated.

I want to recursively convert files from .docx to .doc in a folder. The problem is that all the output files are created in the folder where I run the following command, not in the location of the source files: find -type f -name "*.docx"-exec libreoffice --convert-to doc {} \; I understand that find gives source files to the libreoffice command and the output obviously has to be in the current location, so how can I use a command to loop recursively into a folder and execute the command from the location where the files is found, not the initial one?

I think I'm pretty close to having a code which will start at a directory, then spit out a fixed copy, using fd (instead of find) and ffmpeg. I have written the if statement here as psudo-code: for i in $(fd -e .mp4 -e .avi); do if [ffmpeg -v error -i "$i" -f null - 2] has an error, then ffmpeg -err_detect ignore_err -i video.mkv -c copy video_fixed.mkv; done I believe that when you use 'fatal' if there is no fatal error, the file will be blank/zero. Which would be easier, but I think 'error' is more appropriate. What I want to modify is to have the IF statement execute if there are errors, and do nothing if not. If there are errors it will create the video_fixed.mkv. However, I also don't want this to be video_fixed.mkv, I want it to be the same file name as $i with the same file extension as the original, and to replace the original with it. I'm also not sure if $i is just the filename, or the filename including the entire path, which makes things tricky, I'd have to capture the string after the last '/' as the file name. If it's too hard to do the comparison, I'll have to just copy all the files regardless of if they have errors, but to do this I'll still need to name and override the copies to be the same as the originals. Thanks