General :: Get User Input Into A Script ?
Nov 5, 2009
I have a section of a script that is supposed to change the filename of similar files in a directory. It works the way I need it to work, except that I would like to input the new filename each time it runs without having to edit the script.
I capture 5-6 images into ~/screenshots. They are labeled Picture 1.png, Picture 2.png, etc. I would like to be able to rename them as Lesson 1.png, Lesson 2.png, and so forth. It works if I hardcode the new NAME (Lesson) into the script, but I want to replace NAME with a variable that I can input at a prompt or pass into the script from another. I have tried setting a variable and replacing "Lesson" with $variable in line #11, but that leaves me with only the extension and no filename.
I have also tried using $1 on the command line:
Here is what I have that works:
How do I get a variable into this script?
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Apr 8, 2010
I have a script in which it searches the password file for a username based on the user's input. Is there a way I can take the bad input and keep it in a variable. (one that keeps adding all the non-existent users)so how would I get non-existent users into another variable?
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Dec 2, 2010
I want ssh a remote server through shell script with predefines username and passwd. i dont know how to use expect command to do that.
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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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May 5, 2011
I have a program that I run from the terminal that requires manual input (it's matlab in mex debugging mode, matlab -Dgdb, which starts the GNU C debugger with its own custom settings).
Every time I run this program I always type in the same few commands in the program's interactive shell before I actually start working (for example: run -nojvm; stop at mexFunction; continue). I want to avoid typing these commands and I thought I could do this with shell scripting, saving the commands in the mycommands file, then running: myprogram < mycommands
The problem is that this runs all the commands and then exits the program. I want it to run the commands and return control to me so I can run my commands. Is there a way to tell the shell to use a file or a string as the input to a program then immediately return control to the user without the exiting the program?
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Jan 18, 2010
Execute putty to start a script on a remote linux server which requires user input The remote script does a read -p "Please enter name" NAME I can use plink to execute a script over SSH, the following attempts and problems are shown below :- Note the -load ns is to load a session that doesnt exist, ie ensure no defaults are used
1) plink.exe -load ns <ip_addr> -l <user> -pw <password> <script path/name> Problem) Doesn't allow/show user input, ie its non-interactive.
2) Add -t to allocate a pty :- plink.exe -t -load nc <ip_addr> -l <user> -pw <password> <script path/name> so now the user input can be seen, but I get Ctrl+H (^H) when backspace is pressed, ok if the user doesnt make a mistake!
3) Use putty instead with a saved session putty.exe -load "SavedSession" Get a new window opened, not a biggy, but not as nice. (b) saved session cannot be easily moved. (c) Get password prompt, cannot provide password like with plink, I know I know, use keys, but this is a closed, private network, and its easier not to bother with keys!I would like the SSH to execute in-line, that is from within the batch file/command line shell I am in, not prompt for username/password, run the linux script and allow prompts and delete/backspace to work.
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Nov 28, 2010
I am new to writing shell scripts. So, please bare with me. I am currently trying to write a shell script which will read the directory path as input from user and will traverse the Dir tree to find all available audio and video files. I have tried to write as much as I could but I don't know where I am making mistake as I get some files to be audio file which are actully tar balls. On the second note there are some files which video but script shows them to be audio. And, some video files are completely skipped. I am giving the shell script below so that you can see. I am using two external files as source which I am attaching.
Code:
#!/bin/bash
#Let's load the extensions that we want to search for
vdExt=$(cat vdExtList)
adExt=$(cat adExtList)
[code]....
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Jun 27, 2011
Seemingly simple question, which yields slightly undesired results. Execute putty to start a script on a remote linux server which requires user input The remote script does a read -p "Please enter name" NAME I can use plink to execute a script over SSH, the following attempts and problems are shown below :-
Note the -load ns is to load a session that doesnt exist, ie ensure no defaults are used
1) plink.exe -load ns <ip_addr> -l <user> -pw <password> <script path/name> Problem) Doesn't allow/show user input, ie its non-interactive.
2) Add -t to allocate a pty :- plink.exe -t -load nc <ip_addr> -l <user> -pw <password> <script path/name> Problem) Ok, so now the user input can be seen, but I get Ctrl+H (^H) when backspace is pressed, ok if the user doesnt make a mistake!
3) Use putty instead with a saved session putty.exe -load "SavedSession" Problem) (a) Get a new window opened, not a biggy, but not as nice. (b) saved session cannot be easily moved. (c) Get password prompt, cannot provide password like with plink, I know I know, use keys, but this is a closed, private network, and its easier not to bother with keys!
So ideally, I would like the SSH to execute in-line, that is from within the batch file/command line shell I am in, not prompt for username/password, run the linux script and allow prompts and delete/backspace to work.
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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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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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Feb 25, 2010
I have a service that when shutdown requires a username and password. I use `read` in my script to gather this info because I can't have it in the file. When I run the init script by hand it will ask for the username and password and everything shutsdown properly. When I run reboot or halt I get no prompt. get user input in a shutdown process?
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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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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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Sep 25, 2009
I'm sure you all seen how you can use curl to post to you twitter acct. What I'm wondering is how to add a variable to take user input and post that imput.
Code:
#!/usr/bin/perl
"Enter tweet: ";
$msg = <STDIN>;
[Code]...
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Jul 4, 2010
I am using LuckyBackup to back up my laptop disk to a USB disk. I would like to display to the user the message "Please mount backup disk" and have the user click "OK". LuckyBackup has a feature to allow issuing commands before it does the backup. I have been investigating scripts (I have never written one.), but do not understand how to use them to this end.
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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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Jul 15, 2010
I wanna trace user's command input history. but I dont plan to use "history", "lastcomm" becauze there is not detail of the user command history. if there is some software use to log user command to one file or database, it's suit for me.
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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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Oct 26, 2010
I ve a script to delete a folder is given below:
1. I need a script to clear the cacheroot in my box.
2. What user mention to delete the folder that should ve to delete.
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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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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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Dec 18, 2009
openSuse v11.1
Linux 2.6.27.39-0.2-default x86_64
VirtualBox v3.1.0
One user account completely ignores all keyboard input. No other account demonstrates this bizarre behavior. The faulty account has had occasional keyboard difficulty but it has always been related to the Virtual Machines (VirtualBox); the hosting account always functioned correctly.
Then the ban on keyboard input. Poof! "Keyboard? What keyboard? I don't see no stinking keyboard!"
It is not the physical keyboard. Three different hardware exhibit the same fault. It is not the motherboard; two mb's show the same fault. It is only that one account. And I even took the Windows route of re-installing the OS (what a waste of time that was).
If something changed, I am not aware of it (although something must have).
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Sep 28, 2009
I have a file called a.sql which I need to execute in a database and the script I am calling in a shell script .Before executing the script I have to change a value in the script according to the user input.How can I do this .
Eg...
A.sql file contains an sql query like this:
And My shll script is like this:
When executed the script it asks for enter salary and if the user has input 5000 then the Enter_salary value in a.sql must be replaced by 5000.
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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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Mar 10, 2011
How do i take a single line of input from the user in a shell script?
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Jul 30, 2011
I'm trying to make a script that loads at boot and asks for user input before doing it's stuff. So I created a script in /etc/init.d/ following the example given there (skeleton file) and used update-rc.d to make it load before GDM.
But when my script requests user input, init doesn't stop, and goes on loading other services and loads GDM. I have to CTRL+F1 to get to my script. I want my script to pause the init system till it ends doing it's stuff and the the other services can go on loading.
I tried
#X-interactive: true to no avail.
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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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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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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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Feb 12, 2010
Would it be safe to say that if I build a restricted user: "Desktop" or "unprivileged" user I will be ok? From what I understand - most scripts or applications cannot install without the 'sudo' prompt and user input.
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