Programming :: Read Multiple Input With Bash?

May 7, 2010

As I'm starting to learn bash scripting I'm trying to automatize some tasks I usually perform. I have a notification mail I need to send several times a day. It has this structure:

Quote:

Dear user,
blah blah blah blah

You need to contact the following people:

[code]...

To replace "user", I found this:

Code:

read -p "Please enter username: " username
echo "Dear $username,"

Which probe to be very useful with other simple notifications like this. But I don't know how to manage the email addresses as they are usually more than one and could vary from 1 to 10. They should appear one above the other. I found this: "Here is a little work around. The only thing the user needs to do is hit enter without anything else on a line and it will close out"

Code:

#!/usr/bin/ksh
word=a
until [[ $word = "" ]];do

[code]....

I tried to use it and modify for my needs but I failed, I don't realize yet how can I use it. If possible, I would like to use the until loop like the above example just for learning purposes but any other form will be accepted as well.

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Programming :: Bash - Read User Input: URLs Without The Enter Key Stroke?

Sep 23, 2010

Here's a challenge I've been struggling for months with:

I have a bash script that reads URL addresses of our internal server and then executes some test commands on them. Something like this:

Code:
read -p "Enter URL: " url
sh execute-what-ever-to $url

After copy-pasting the URL the user taps the enter key and the script proceeds, but here comes the tricky part: I want this to work without the need to press the enter key after copy-pasting the URL.

"read -n" does not work in this case, as the URLs vary greatly in length. However, the URLs always end to the same string. They could be like "http://url1/END", "http://url2/END" and so on. So this ending string "END" could be theoretically used to recognize that the whole URL has been pasted.

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Programming :: Read Multiple Arguments In Bash Script?

Nov 24, 2010

First, I made a simply script which let me download a file from a filehosting site on my server, but I can only put one link there, so I need help how to put multiple links in.Here is my script:

Code:
#!/bin/bash
echo "Enter URL:"

[code]...

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Programming :: (BASH) How To Read Multiple Lines From Text File

Mar 11, 2011

For example, I have a text file with data which lists numerical values from two separate individuals

Code:
Person A
100
200
300
400
500
600
700
800
900
1000
1100
1200

Person B
1200
1100
1000
900
800
700
600
500
400
300
200
100

How would I go about reading the values for each Person, then being able to perform mathematical equations for each Person (finding the sum for example)?

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Programming :: Bash Read Input Word For Word ?

May 4, 2010

I am pretty new to bash scripting...I am trying to write a script that will take an input and read it word for word and then DO something with it like echo. I have been able to find how to read word for word from a file but I don't know how to do it with input.

I was looking for something like

Code:

exit 0 The input would be A-Z a-z 0-9 and have a single space between each word.

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Software :: Read Multiple Lines From User Input In C?

Feb 26, 2010

in c how to read multiple lines from user input

using scanf it is not possible and using gets we can able to read one line at a time
hoe to read multiple lines at a time from user input....

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General :: Read From Input File And Append To Multiple Files?

Nov 22, 2010

I wanted to be as clear as possible. I have to add hundreds of new servers to hundreds of configuration files in Nagios. Here is a sample structure:

servers.txt has:
SERVER3
SERVER4

[code]....

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Programming :: Bash Ctrl+c Tarp And Bash Read With Timeout?

Jan 24, 2010

simple bash code:

Code:
#!/bin/bash
trap "echo 'you got me'" SIGINT SIGTERM # to trap ctrl+c
echo "Press ctrl+c during 5 sec loop"
for ((i=0;i<5;i++)); do

[Code]...

How come code behaves normally and stops when ctrl+c signal is caught and resumes, but after I use at least one timeout read in the code it looks like, if signal is caught again it doesn't pause the execution but skips the loop. If you remove -t (timeout) option from the read, both loops look the same!

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Programming :: Run Multiple Bash And Php Scripts From A Bash Script?

Jul 25, 2011

I have written quite a few separate bash & scripts and php scripts that up to now I have run from cron jobs. However I have to estimate how long each takes to run, before running the next and so it probably takes much longer than necessary to run them all. They have to run in order.

Now there are so many I am thinking it would be better to have a master bash script that would run one after the other, but I am not sure how to get the master script to wait before starting to run the next script. Is this possible and is there a command that will make the script wait between bash and php scripts , for them to finish, before running the next?

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Programming :: Read Each Line Of A File As Input?

Jun 21, 2011

I'm writing a program which now accepts user input:

Code:
echo "Enter a date in the format YYYY MM DD hh mm ss."

read gregyr gregmo gregdy greghr gregmn gregsc This lets the user input a date and time, such as 2011 06 21 15 12 45, and have each number assigned to their corresponding variable. Later in the program, these variables are put into an equation, and then the terminal spits out the answer. Now I have to have the program read all of the lines from a text file, which is in this format, assign the variables.

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General :: Bash Script To Read Csv File With Multiple Length Columns

Jul 27, 2011

I've searched everywhere and I can't come up with a good solution. For each line I need to find the average, min, and max. I've seen plenty of solutions where the number of columns is fixed, unfortunately for me these lines can get pretty large. My thought was to read each line individually into an array, loop through the array and find the avg, min, and max that way but i haven't had much luck. I can read each line using a while loop but I'm having trouble with the array part, or perhaps that's not the best solution?

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General :: Create BASH Script To Process Multiple Inputs On Read

May 26, 2010

First post from a very new Linux user....I am trying to create a BASH script that will allow user to provide multiple directory names, Checks if the directory exists and if not create the directory.

I am using the following code:

Which works fine as long as the user enters a single directory name. How can I modify this so it will process all directory names user enters on the read response?

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Programming :: Write A Program Which Will Read Input From A Text File

Apr 7, 2010

i am trying to write a program which will read input from a text file, check if each line contains any alphabets and then display a message imforming me if there is an alphabet in each line. My text file is formatted in this way...

[Code]....

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Programming :: User Input Bash Script

Apr 28, 2010

I've written a bash script that allows a user to input a directory location to find out the size of the directory. However, if the user inputs a directory and finds its size then inputs another directory then wants to quit, the script asks the user numerous times if he wants to quit!! The script won't exit until the number of times the user looks at a directory is reached! What gives?

Here's the script:

Code:

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Programming :: Working With User Input In Bash

Jun 2, 2009

I've been using python/bash to help myself automate things for a long time, however I am curious. One reason I use python more is because I don't quite know how to work with user input in Bash, such as getting it to ask for input and wait, and then placing that user input into a command.

Here's an example of a script I use from time to time for converting OGG video files into AVI.

How could I write this same script in Bash? Keep in mind I am mostly self taught, so I am by no means an expert programmer.

Code:

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Debian Programming :: Check If Files Exists By Read Input From A File

Jul 27, 2013

I need a script that dose the following checks if files exists by read input from a file then compares them to the files listed in the directory if they don’t exists the script would report back which file dose not exists. I also need to format the output so that files are grouped in different groups, group A, B, and C and etc based on file name. I would like the output of that do not exists files to be sorted based on second number in the file name than group according. I understand some of the basics of bash scripting something along of the lines of a loop and if statements might do the trick. Below is what I have so far. I don’t car so much about the script reporting back the file exists I prefer to only know if the file is missing and is less than 3 days old. Problem is if a file dose not exists in the reports file the test compares against the wrong file.

Group A

Foo22000.tar.gz
Foo22010.tar.gz

Group B

foo25000.tar.gz
foo25100.tar.gz

Group C

foo26000.tar.gz

Code] ....

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Programming :: Bash: Handling Input From File And Keyboard?

Jan 20, 2009

I have this little shell script which copies file names taken from inputfile:

Code:
while read line; do
cp -i $line something

[code]...

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Programming :: Bash: Passing Output To Another Programs Input?

Nov 12, 2009

I am not sure if that Subject really explains it, basically I have a script that executes a CLI java-applet that requires a passphrase from the user. I can easily execute this by issuing the -p argument followed by the passphrase however that shows up on possible logs or at least on the results of the ' ps ' command. If you do not supply this -p argument it provides a new line with the echo " Enter Passphrase: " and asks for input.

how can I provide a result/input for the Passphrase request and is it still possible to throw this application in the background with the ' & ' following the command? I have seen a few examples that show a /bin/expect that expects a result and sends a command however I would like to refrain from any extra dependencies. Example of Regular Execution of application:

Code:

$ /usr/local/***/**** -u USERNAME -r Default-Realm -f certificate.der
Password:

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Programming :: Bash Script Predefined User Input

Aug 9, 2009

I have a script im having some problems with, what I need is to have the system generate a random password for me and use that password when creating new users to it.

System is Debian Lenny and script is in bash.

The program is znc. I have made it so that it will generate the random password on the shell but the problem is to use it in the bnc software.

To make a password there the command is znc --makepass and look like this:

My question is now if it would be possible to put in the script so it would "answer" when it need those passwords ? the random password that is generated is in a variable called $setpass and is NOT crypted.

Or is there any other software that would be able to generate that md5 string for me ?

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Programming :: Bash: Feeding Input To A Script From A Text File?

Nov 17, 2010

I have a script which checks on my jobs that run on some cluster.The script, "script.sh", takes as an input the job-id for the job to be checked. Sometimes I have 100s of jobs and I want to check them all (for successful completion.) I could put these job-ids into a text file, "job-id.txt", each id in its own line.For each job-id, the script would ask me few questions (with a yes or no answers) to see if I want to do some other checks for each job-id.I want to know how may I direct my job-ids from this text file into the script one job-id at a time.

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Programming :: Catch User Input While The Bash Script Is Running?

Oct 30, 2010

How do you catch user input while the script is running? Or, how would you make two scripts run at the same time, but use input from one script to the other? The program I'm trying to make, echos text on the screen continuously, but while thats happening, I want the user to be able to input something, so the program can detect the input and display something else. So I thought maybe I could make two scripts run to do each task.

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Programming :: Bash - Calling A Specific Variable Based On User Input?

May 3, 2011

I'm trying to call a specific variable based on a user selection. For example:

Code: Select a file:

[1] foo.tar
[2] bar.tar

Enter a selection: I have already coded each possible selection to have its own variable. If the user selects 2 I need to select $SELECTED_TAR2, or if they select 1 I need to select $SELECTED_TAR1 and then do something like this behind the scenes:

Code: cp /home/user/$SELECTED_TAR2 /home/user/backup/$SELECTED_TAR2

I was thinking something like this:

Code: echo "Enter a selection: "
read -e SELECTED_NUMBER
cp /home/user/$SELECTED_TAR$SELECTED_NUMBER /home/user/backup

[code]....

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Programming :: Bash Scripting Handling User Input Sections Automatically?

Jun 17, 2010

I have a system setup script for my Slackware installations that pulls all packages and source files from another machine and sets everything up to be identical between machines. The script works as expected but make it entirely unattended. How do I make the bash script deal with automatically selecting "Yes" for, for example "Install x(Yes/No): " when prompted by a make file?

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Programming :: Multiple Input Into Seq Command From Pipe - Single Column Unique Numbers

May 13, 2011

Have this script which is reading in a series of files, one at a time with while-do-done loop, each file goes through various greps/awk's where this info is then saved to various files for later use. i.e....

Script is being run on Linux Red Hat,

In one of the grep/awk's the output (currently) are 2 columns (min max), i.e....| awk '{print $1, $2}' | sort -u which outputs (e.g.)

The number of "min max" pairs varies from file to file. Want to output a single column of unique numbers from the min max pairs & get the number of them for input to a file...i.e...

Where <PROCESS> is some process/technique that will generate a single column of integers (increment of 1) to pipe into the next one (sort -u)

i.e. (example from above)

Have tried command seq - only works for single pair input i.e.

Is there any command like seq etc which will output a single column based on a input of min max numbers (increment 1) to pipe onwards to next command?

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Programming :: Create A Simple Program With Will Continually Read Input From The User Until They Enter A Blank Line?

Apr 6, 2011

basically i have to create a simple program with will continually read input from the user until they enter a blank linei know how to read in certain input but not sure how to get it continually in a loop

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Programming :: Bash Scripting - Taking User Input And Adding It To A Particular Area Of A File?

Jan 12, 2010

in bash scripting...say I want to take the input from a user via a question...I would do this:

Quote:

#!/bin/bash

echo "How large do you want this partition to be in GB (enter only the number)?" read PART_SIZE echo "You want your partition to be $PART_SIZE GB" But I don't want to echo it back to the screen, I want to add it to the content of /etc/fstab. I have been mucking around with sed to find the tmpfs partition in /etc/fstab and add the partition size attribute (this is to use the onboard RAM as a volatile partition)...but am not having any luck...

The portion of /etc/fstab that uses /dev/shm for the tmpfs partition is:

tmpfs /dev/shm tmpfs defaults 0 0

So, if a user says "24" GB to the answer (from above), how do I get it to automatically add that value to the tmpfs partition line in /etc/fstab? So it would look like:

tmpfs /dev/shm tmpfs size=24g,defaults 0 0

I understand that I would also have to come up with a way to put "size=XXg", which I could do with a copied over generic file before this action...then the script would have to find "XX" and replace it with the user's figure...

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Programming :: Bash Scripting With Sudo / Password Prompt And Accepting User Input?

Jul 30, 2011

I'm creating a bash script to do some tasks for me. I would like the script to be run at a set time of everyday. My first question is if it is possible that if one of the commands in the script requires sudo, is there a way to get around it with out making sudo not require a password. Such as, is there a way to include the password in the script? If that is the case, I can always just set the file as read only by sudo. I've been looking for a way to do this, with no success. if I have a command that wants input, how do I give it to the program. For example, if I want to make a zip file that is encrypted, the command would go as:

Code:

zip -r example * -e

now how would I get the script to insert my wanted password.

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Programming :: Bash To Read Write Registers?

Jun 3, 2010

I have been looking for a script example of reading and writing to the parallel port's data, status, and control registers using bash. I see it done in pascal, tcl, etc. but nothing in bash.

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Programming :: Bash - Read The Array Dynamically?

Sep 24, 2010

Code:

test=(1 2 3 4 5)
for car in ${test[@]}
do
echo "Element : $car"

[code]....

if variable $car equals 1, new element is added "6" to an array. But i don't know why when i am printing all elements of this array (echo "Element : $car") this element ("6") is not mentioned, but if i make a command which check an amount of contained elements by array it will be 6 elements.

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Programming :: BASH Read File Once Then Return To Top?

Aug 8, 2010

I have a script that reads part of a line, delimited between the first and second intended part by a colon. Then it "chops" the part after the colon, which are words offset by commas (counting them beforehand so as to catch every word in the string's second part), like this:

Code:

"COLORS.JPG:red,orange,yellow,green,"
(Returning)
red

[code]....

single script that parses/breaks both parts of a line like this "COLORS.JPG:red,orange,yellow,green;blue,indigo,violet," so that the two parts, separated into single words (or two and three words, sometimes with spaces) can be used as single-line annotations and written to JPEG files using Exiv2. So far, I haven't been able to come up with a script that does this without one part of the total string(usually that part after the colon) becoming the first word in the second array. In other words, I look for this:

KEYWORDS:

[ ]red
[ ]orange
[ ]yellow

[code]....

Or vice-versa (ie, the second array winds up as a single-line "member" of the first). I think it's because I'm using a single while read loop to read the text file in which the filenames and substrings happen to be. If there's some way of reading a file once and going back to the beginning to read it again in another while loop, I haven't found it.

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