General :: Passing Multiple Arguments In Shell Script?

Dec 11, 2010

The script receives multiple files as parameters and it is supposed to count the number of lines in each of them and write that number in another file.

This is my script:


while [ -n "$1" ]
lines=`cat $1 | wc -l`
echo "The number of lines in file $1 is $lines." >> lines.txt

Is there any other way to do the same thing, without using shift?

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Programming :: Case Statement Passing Multiple Arguments?

Aug 7, 2010

I've started dabbling with the case statement in order to pass some option's arguments into variables. I do not think I am doing this right.


usage() {
echo "Usage: $0 [-z|--snooze] [-c|--channel] [-p|--playlist]
[-m|--message] [-v|--mpcvolume]"


As you can see, I want to pass arguments depending on the option(s) chosen by the user; ie. --snooze, or --channel. By default, if no options are chosen, I'll display a usage message; though in the future I'll provide some sane defaults. I'd like to create a case statement to handle passing arguments to any number of options; something like:

Code: --snooze 20 --message 'wake up!'

and for the other arguments, it would have a default set. The case statement I provided fails with a syntax error "syntax error near unexpected token `$2'" near the '--snooze' in the statement, so I take it you can't pass a parameter in this way; but I'm confused as to how I'm supposed to pass different parameters to different options without the options being confused as parameters.

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General :: Passing Program Arguments To Gdb?

Nov 18, 2009

I'm using gdb to debug my program. My program requires arguments (e.g., ./prog -dfile).But if I use gdb as in gdb ./prog -dfile, gdb wants to interpret the -d argument. How do I pass an argument to my program via gdb?

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General :: Passing An Array As Command Line Arguments?

Apr 2, 2011

how to pass an array as a command line argument in a shell script?

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General :: Scripting - Try To Passing Arguments To For Cycle - Inside A Function

Apr 26, 2011

The code:


Problem: I need a method to maintain the $i variable. In fact, actually, this variable get lost when executed. I think that an escape can preserve this variable and permit its execution inside the function, but I've no idea about.

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General :: Passing Commands As Arguments To Functions In Bash Script?

May 31, 2010

I wrote a simple bash script to let me treat any set of programs like a deamon. For example if I configure the script a certain way I can start/stop/get the status of apache, mysql and php all from one command. I am having a bit of a problem though. I am passing commands as strings to a function and then depending on the arguments to the script it might run one of these commands or another. Some of these commands need to beun in the background though, such as deluge-web. When I send "deluge-web &" to the function and it execute it deluge-web does not start in the background. I can't figure out why this is. I have tried escaping the & with ''s and with a , but nothing seems to work. I know that this is some idiotic thing that I am overlooking, but I am a bit stumped. Here is the script configured to start/stop/get status of deluged and deluge-web.

function checkanddosomething {


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Ubuntu :: Passing Arguments In Commandline

Mar 13, 2011

I have some source code of an application called gmapping.

I am pasting the source code documentation below:


How do I run this file. When I enter the filename parameter, and press enter, I get

COMMAND LINE: parameter aces not recognized no filename specified

GridFastSlam: Initialization Error!

(Did you specified an input file for reading?)

What is the right line to type in the terminal to sun this code?

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Programming :: Passing Arguments To A Child Process In C++?

Feb 7, 2010

what I am trying to do is to pass an argument to the standard input stream of a child process. I mean I create two programs .. first one invokes the other. second one contains something like


scanf("%d", &n);

now I want my first program to be able to pass a value to the second one so that it gets stored in n.

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Programming :: Passing Arguments To System Command?

Dec 17, 2009

I am calling another executable in my application (C programing) using "system" command
which is user interactive program. now i want to pass those args in system command only.

system(" executable ");

Executable will expect 1,2 or 3.

1 is to continue
2 for do changes in settings
3 exit from application

how to pass these in to system command

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Programming :: Syntax For Passing Arguments In Csh Aliases?

Mar 22, 2009

I want to write a little time-saving alias for my .cshrc file that will move files and then cd to the directory I've moved them to. What I can't quite figure out is the syntax to say 'move all the arguments except the last one.' Here is what I have:

alias follow 'mv !:1-$-1 !:$; cd !:$'

This actually seems to work, but it also gives me an irritating error:

mv: cannot stat `destinationdirectory/-1': No such file or directory

Similarly, I tried:

alias follow 'mv !:*$#argv-1 !:$; cd !:$'

Again the move and cd are successful, but again there is an error:

mv: cannot stat `destinationdirectory/0-1': No such file or directory

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Ubuntu :: Incrontab Not Passing Arguments To Bash Script

Feb 28, 2010

It seems incrontab wont see spaces properly at all. I setup a script to echo the arguments passed to it by incrontab to a file, and no matter what I put around the arguments on the incrontab file it will count a space as the next argument.

I have written a script to automatically retrieve imdb artwork for a given filename. Here is the script:


You can ignore all the commented "echo" commands that was just me testing. Anyway, the script work fine, however I am trying to use incrontab to monitor a folder, when a new (video) file is moved into the folder, it should execute the script and retrieve the artwork. My problem is, when incrontab passes the $# argument to my script, the script wont work because the spaces aren't escaped.

Here is some more detail:




The problem is, the script GetArtwork, doesn't see "Bangcock Dangerous" it just sees "Bangcock"

I have tried putting quotes around the $# in the incrontab - this just makes the script see "Bangcock (notice the single quote character)

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Programming :: Passing Arguments To A Bash Source File?

Apr 24, 2010

Is it possible to pass arguments to a source file in a bash script? For example

. /dir1/dir1/funclib -a -b

How would you check for the passed arguments in funclib without getting confused with any arguments passed to the main script?

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Programming :: C Syntax - Passing In Unknown Number Of Arguments?

May 18, 2009

I need to write a wrapper function around the mvprintw function, like so:

int smvprintw( ? )
// Do various checks/modifications on the first two arguments (int y,
int x) first,
// and then
return mvprintw ( ? );

How should I write the args for smvprintw so that I can pass all the data correctly to mvprintw, and also do my checks on the first two args (for example, to modify them)? I'm confused by the prototype of mvprintw: This is mvprintw as listed in the man pages:

int mvprintw(int y, int x, const char *fmt, ...);

And this is how I saw it in ncurses.h:

extern NCURSES_EXPORT(int) mvprintw (int,int, const char *,...)

I believe the "..." refers to the unknown number of items after const char * fmt. Will it suffice to do something like "int smvprintw(int y, int x, const char * fmt, void * etc)" and then "mvprintw(y, x, fmt, etc)" inside the function?

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Programming :: Passing Command-line Arguments To Qglviewer Application?

Jul 13, 2009

how to use QGLviewer. I want to give my program a file name as a command line argument. All of the sample programs I find have a main.cpp file like this:


#include <QApplication>
#include "window.h"
int main(int argc, char *argv[])


Then the Window class, which is derived from QGLViewer, does all the program's actual work. If I want access to argc and argv, for example, to open and read a file that's passed as an argument, what would handle that? Is there a built-in way to get the arg variables to the window class, or do I need to just write a loadfile function and pass them?

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Ubuntu :: Parsing Textfiles And Passing Arguments In Bash To Preserve Tracker-tag Metadata

Sep 3, 2010

I'm at the bottom of the bash learning curve, looking up, hoping someone can toss me a line. I need to update tracker on my system but this will erase the metatag database I've been building up over the course of months for the purpose of indexing a news archive. So the solution seems to be, 1) save the output of tracker-tag to a text file for all relevant files within a directory, 2) upgrade tracker (since the version in the Ubuntu repositories is very much out of date) and then 3) use a script to parse the text file and pass appropriate arguments back to tracker-tag to rebuild the database. It sounds as though it ought to be simple enough, but I need a push in the right direction, which hopefully will not be off the cliff. Before I confuse my metaphors any further, here's what the text file looks like.


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General :: Arch Usability - Pass Arguments From A Shell Script To A Program?

May 7, 2010

1. What file do i have to edit in order to include /usr/local/bin in the class path (ie. I put an executable in /usr/local/bin and when I try to execute it, it says the command cannot be found, etc.) EDIT: Solved, just didn't set PATH correctly. EDIT: New problem. When I try to execute a program in /usr/local/bin, it says "fopen: john.ini: File not found" Yet when i cd to /usr/local/bin, it doesn't say that. What would cause this?

2. Once I get my system setup the way i like it, how would i go about making it into a bootable CD/DVD?

3. How would I pass arguments from a shell script to a program?

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General :: Running Shell Script Taking Command Line Arguments In A Jsp Page?

Feb 10, 2011

how to run a shell script taking command line arguments in a jsp page.

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General :: Write Shell Script That Takes A File Path As Command-line Arguments?

Dec 14, 2010

How can i write a shell script that takes a file path as command-line arguments.and it should report whether the path denotes a file or a directory.

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Programming :: Running A Program With Arguments Using A Shell Script

Jul 14, 2011

Running a program with arguments using a shell script

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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:

echo "Enter URL:"


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Ubuntu :: Passing Enter To Shell Script

Apr 26, 2011

I want to write a script that runs ssh-keygen command and when it prompts for input, the ENTER key code is passed automatically for all questions.

For example consider this:


I want to automatically pass ENTER to the questions. What should I do?

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Software :: Taking Command Arguments From Serial Port Into Shell Script

Jun 11, 2011

I have a linux system connected to an external sensor device that spits out strings of serial data every few seconds. I need to send the data to a remote URL for logging and graphing purposes.

The data coming down the serial is essentially in the format:

And I need to call a URL from my linus box in the format

wget -s [url]

I can read the data to the shell using cat </dev/ttyS0 but I'm now stuck as to how I might then format that data and pass it to a shell script which would presumably run in an endless loop and contain the wget.

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Programming :: Python Passing Multiple Args To Bash

Jan 14, 2011

I have a text string I want to pass as the second arg to a bash shell.

My python line is :

The first arg "gap" works great and the bash shell uses it as $1

I need "fill" passed along as $2 intact

Here is the bash line:

As you can see after the -f it has to be in single quotes and $FILL will complete the single quote

Nothing is getting passed as a second arg from python, I did have the first word at one time but that was 85 tries ago and forgot how I did it!

The bash script complains about an unterminated quote.

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Server :: Shell Scripting Command Line / Getting Error While Passing Parameter?

May 6, 2011

I am very new to shell scripting.How does one pass a command-line parameter to a shell script?for the below program
mount -t cifs -o user=ramkannan,password=Linux123@ // /MT
cd /MT/test
date=`/bin/date "+\%Y-\%m-\%d-\%H-\%M-\%S"`
mysqldump -uroot -pram2@ employeedb > $date.sql
gzip $date.sql

I want to pass parameter for everything,i tried in google and did but iam getting error while passing parameter to all

mount -t cifs -o user=$1,password=$2 // /MT
cd /MT/test
date=`/bin/date "+\%Y-\%m-\%d-\%H-\%M-\%S"`
mysqldump -uroot -pram2@ employeedb > $date.sql
gzip $date.sql

i was getting error while passing parameter to all.

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General :: Count Multiple Objects In Shell Script?

Jul 21, 2010

Trying to count the number of oracle instances on HPUX 11.23 - using ksh. I have multiple instances running and I would like to have a count for how many processes for eachinstance.Example, run the 'ps -efu oracle' command and for each instance increment a counter. So I am looking forINT1=# INT2=# INT3=# ... INTn=#I keep thinking a 'do-while' or some type of 'while' loop but I am missing something, somewhere

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General :: Debugger For Shell Script - Get Rid Of Multiple Exit Command ?

Jun 14, 2010

My two doubts:

(i) In office i open many terminal windows when i start my day and in each terminal i keep on login as different users many times in a day to do some task, by the end of the day when i need to exit from all terminals in a safeway instead of directly closing it i need to execute exit command or CTRL+D many times to close a single terminal safely. Can anybody tell me a way to exit from each terminal in single go, is there any command to acheive this ? I wish if we had a command like exitall like in vi we have :qa command to close multiple files opened in single window. I hope friends you have got what i am asking for ?

(ii) I want a software for debugging shellscripts searched a lot but dint got it.

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General :: Shell Scripting: Getting Multiple Input Files For An Application?

Sep 21, 2010

I am running an application called QuantiSNP [URL]. The binary file is "quantisnp2", called upon in the "" supplied by the authors. I am only able to run the application for single file processing (e.g. 1 input file for 1 sample; I can't run the batch file processing because I don't have the necessary BeadStudio report files, which has different formatting for the input files).

The difficulty is that I have 300 samples (300 unique sample IDs) and 3 input files for each sample for a total of 900 runs of this application. I am wondering how would I be able to automate this process as a shell script instead of basically manually changing the sample ID and respective input files every time a run completes? I bolded the single file processing shell script command line options below that need to be changed for each sample/input single file processing run. The command line option "--sampleid" is for the name given to the processed output files corresponding to the sample of interest and there are 3 input files for each sample.

/home2/jason/QuantiSNP/quantisnp/linux64/ /home2/jason/QuantiSNP/MCR/v79/ --config /home2/jason/QuantiSNP/quantisnp/config/params.dat --levels /home2/jason/QuantiSNP/quantisnp/config/levels-affy.dat --outdir /home2/jason/QuantiSNP/quantisnp_out/ --sampleid sample1 --gender female --input-files /home2/jason/files/sample1_input.txt

Note that each sample has 3 input files, for a total of 3 runs of "quantisnp2" for each sample. e.g.

sample1 /home2/jason/files/sample1_input.txt
sample1 /home2/jason/files/sample1_input2.txt
sample1 /home2/jason/files/sample1_input3.txt


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General :: Shell Script File - Pass Multiple Parameters To Interpreter?

Feb 2, 2011

I have a Python script that I run which needs to execute under a special environment, so I would run the program like so from my working directory (~/project/src):

python shell

This opens up an interactive shell for me to start typing my own commands.I have another set of administrative activities that I would like to house in another directory (~/project/admin). The is really finicky about running from the working directory. So, to make this whole thing work, I made a script which starts off like so:

#!/usr/bin/python ../src/ shell

There are a couple problems with this. The first is that it doesn't work:

/usr/bin/python: can't open file '"/../src/" shell': [Errno 2] No such file or directory

How do you specify multiple parameters to the interpreter?How do I change the working directory?

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General :: Runs Multiple Shell Script Inside A Main Script Using Crontab?

Oct 22, 2009

I wrote a simple shell script called and inside it calling another shell script called are placed in a same directory.[/home/srimal/test]



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Ubuntu :: Not Allow Multiple Logins To The Shell?

May 20, 2010

Is there a way to prevent a user from being able to login more than once. Not a one-time login, but a single login. What I'm trying to do here is in moving our email system, an email user would login to this account, enter some password information, sync up their email, and have the passwords files removed, then log off. Next user can log in to the same account.

The reason for the single login is to protect the user's passwords.

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