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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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 :: 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 - 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 :: 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 :: 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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Ubuntu :: Bash Script, Take User Input Then Use It As A Path?

Jan 29, 2011

I'm trying to make a script to make it quicker to encode videos.

Code:
#!/bin/bash
echo "Type the path of the video file"

[code]....

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General :: Store User Input In A Config File GUI For A BASH Script?

Dec 4, 2010

I'm trying to create a backup script. For my second version, I want to make a GUI that will ask the user three things:

1. which folders should be excluded
2. where to store the backup
3. the user's email

I need to store this input, and later input the values into variables in my script. How do I go about doings this?

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General :: How To Make BASH Script Yes / No User Input Query Terminate With 3 Invalid Inputs?

Mar 16, 2010

I have a BASH script which at one point asks the user a yes/no question. I want to make it so that if the user types in an invalid input 3 times consecutively then the BASH script will echo an error and terminate with exit status 1.

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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 :: Shell Programming - Delete User Input

Jan 21, 2011

I recently started shell programming and my task now is to do a menu display.Currently i am stuck whereby user will input both title and author and it will delete it.

Do i have to use sed command?

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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: 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 :: C - User To Input The Name Of A File As An Argument

Aug 5, 2010

Write a program that requires the user to input the name of a file as an argument. If the user fails to include one argument it should make use of a thread that handles a signal. The signal handler should tells the user Incorrect number of arguments and then calls the terminate signal on the process.

If the numbers of arguments are correct then the program should allocate memory space to the file (5MB) and create a child process that requests the user for a character that it should send to the parent. The child should keep request for data until the user keys in the character O. During each request it should pause for 10 seconds, send the character to the parent and then requesting again for another character.

The parent should get the character from the child. Do not make the parent wait for the child to finish requesting for data. Make use of pipes to facilitate communication between the parent and the child. A second child should be created to read and display data from the file. Make use of any appropriate Inter Process Communication technique to ensure that the second child and the parent do not access the file simultaneously (Mutual exclusion).

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Programming :: Array Size Base On User Input?

Oct 27, 2010

If I have an array which its size is based on the user input, from some material, I need to use malloc function to allocate memory for that array what is known dynamic array. Don't forget to free it.hat's fine, however, I like to try things out even I know the program will crash.I have written some test program on my Mac using C language like this:int width = 0;//get user input, and assign the input value to width, for example, 3char * array_var[width];and width is an int, its value will be assigned by the user input. The point is, this program work as expected, for example, in command line, I input 3, then array_var length is 3, its size is 3 * sizeof(char *).

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Programming :: Take A Single Line Of Input From User In Shell Script?

Mar 10, 2011

How do i take a single line of input from the user in a shell script?

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Programming :: Perl - Way To Encrypt Command-line Input When User Enter A Password ?

Nov 4, 2010

I need user to input a password through command line in Windows cmd prompt. Is there a way to encrypt the input (such as put it into ......) when user is typing ?

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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 :: Switch User In A Bash Script?

Jul 28, 2011

I need to switch from one user to another in a script in a solaris machine. No one of those users is root. I see I can use su commandt I think I can't pass the password as a parameter . I'm using bash. Is there anyway that I can switch user in a bash script

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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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Programming :: How Can User Runs Bash Script At Boot Of PC?

Dec 28, 2008

I wanna that the pc starts (on/off), the pc arrives to gdm. It waits for an user to log.But but at the boot of this machine, I would like that an user has a script started in the processes (NO X cuz bash script).How can an user runs a script at boot of the PC ? (once only and no one loged)

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Programming :: Get A Password In A Bash Script For Mysql User Creation?

Apr 25, 2010

I'm trying to get a password in a bash script for mysql user creation. But sometimes a get a non-alphanumeric character(s) in the password, and mysql failes with that. I tryed with apg -EO0Il1`~!@#$%^&*()_+-=[];./{}|:"'<>? but failed. I tryed with sed 's/[^a-zA-Z2-9]//g' , but at that moment the minimum password lenght failed. I'm also fine when there is a better alternative then apg.

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Programming :: BASH - Create User And Password On Multiple Machines

Aug 9, 2010

I'm trying to write a script that will prompt the user for a username/password, then create that user/password in the right groups on all my machines. I know this is kind of a long way around to avoid a NIS server, but I like making my life more difficult.

This is what I have so far:

Code:

the script has 2 problems: The "if" functions return an error and do not compare the strings successfully. whatever password is entered does get applied properly and the user is unable to login

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Programming :: Check If The User Is In Correct Directory Before Executing Bash Script

Dec 10, 2010

I have been searching for 90 minutes for something that I "think" should be fairly easy. I'm pretty new to Bash Scripting so I could be completely wrong. Then again it may be a weird request to even need something like this. But here it is.I have a script written to convert data from one of our software version to another. The only thing I need to add to it is a "check to make sure the user running the script is in the /tmp directory".

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Programming :: Bash Scripting - Display Real Name From Username Logged In + User Processes?

Jan 14, 2011

i am using putty to connect to the linux server and i am using nano as my text editor to write a bash script.

this is my script:

echo "Please enter your Username"
read userName
userName= grep $USER /etc/passwd | cut -d: -f5
echo "Welcome " $userName | cat >> output.txt

the problem i have is that when i enter my username, the output (my real name) does not display in the output.txt. instead it displays in putty. so when i run my script in putty it shows the message to enter username and after i enter my username my real name appears below it. i want it to show in the output.txt

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Programming :: Bash Shell Read User Argument From Command Line And Test It

Aug 29, 2010

Trying to create a small script that will read user's input, test if user entered some input and if not display some message or display a text using user's input.

The script is the following but i get an error saying "[: 6: =: argument expected"

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