FAQ Database Discussion Community

## Updating Ubuntu 11.04 to 12.04 preferrably through command line

I am attempting to update my Ubuntu Natty Narwhal (11.04) to Precise Pangolin (12.04). When I checked the Update Manager, I was told I couldn't do that. I had to get to 11.10 first, if I want it safely. Sounds like a plan. And so I've ran through the Update...

## How to run another file using command prompt and continue with the rest of steps without waiting for the file to be closed

batch-file,command-line,command,command-line-arguments,command-prompt
I came across a strange scenario where it works intermittently. Requirement: Need to back date the system date before running a file and once the file is ran the system date should be reverted to the current date. I have written a code which works for one of the file...

## Parsing exclusive groups in Python

python,command-line-arguments,argparse

## Python argparse a list input

python,command-line-arguments,argparse
The code below accepts command line arguments for mode such as -m fizz and -m fizz bazz. This, as expected, passes the arguments to the main function as ['fizz', 'bazz'] (for the second example above). It seems user-unfriendly to pass command line arguments with spaces, so I'd like argparse to...

## How can I call a function in a vbscript with command line arguments?

vbscript,cmd,command-line-arguments
I have a script that executes remotely to see if a program is running. It works fine but I need it to check for several programs on several servers and I don't want to re-write it. I'm trying to see if I can call the function within the vbscript via...

## Why are command line arguments passed as a String array in Java?

java,command-line-arguments,main
In Java, the command line arguments are passed into my program as a String array, like this: public static void main(String[] args ) { } Why does this use an array, and not a single String ? I think it would be more flexible / adaptable if the command line...

## Command line arguments and read file/print text in C

c,process,command-line-arguments
I am trying to work with command line arguments and parsing a text file in C. Basically I want to be able to put in two numbers, like, 1 and 4 and have it read a column of a text file then print it to stdout. I want to be...

## Passing command line arguments to process when debugging with GDB/Eclipse

eclipse,debugging,process,gdb,command-line-arguments
I'm trying to debug process with GDB from Eclipse (CDT). I can start debugging, step on code and so on. So, basic setup seems to work. However, I don't understand how to pass command line arguments to process. Executable is not built with Eclipse, I use separate make files. Steps...

## How to read values from command line in bash script as given?

bash,shell,command-line-arguments
I want to pass arguments to a script in the form ./myscript.sh -r [1,4] -p [10,20,30] where in myscript.sh if I do: echo [email protected] But I'm getting the output as -r 1 4 -p 1 2 3 How do I get output in the form of -r [1,4] -p [10,20,30]...

## How to have a.out file read text file through terminal by typing “a.out < textfilename.txt”

c++,command-line-arguments
I'm new to programming and I couldn't find an answer to my problem. This is the code I have to have my program open and read the text file I want while running it on the terminal: using namespace std; int main(int argc, string *argv[]) { string fileName; getline(cin, fileName);...

## Xcode won't pass arguments to C++ executable

c++,xcode,debugging,command-line-arguments
I'm attempting to debug a C++ project using Xcode. My program looks for input through stdin like so: string line; getline(cin, line); I have an input file called input.txt that I normally pass into the executable like so: ./verti < input.txt In order to accomplish the same thing while debugging...

## xargs - does the program run in loop or get re-executed

linux,command-line,command-line-arguments,execution,xargs
I have a C++ program that is outputting text strings which are read as command line inputs to my Java program. My question is does the Java program continuously run with new inputs given or does the program terminate and then get executed again when new command line arguments are...

## How to split an UTF-8 string by an escape sequence provided as command line argument in Python 3?

python,string,split,command-line-arguments,ansi-escape
I'm trying to seperate UTF-8 strings by a delimiter provided as command line argument in Python3. The TAB character "\t" should be a valid option. Unfortunately I didn't find any solution to interpret an escape sequence as such. I wrote a little test script called "test.py" 1 # coding: utf8...

## How to pass Ctrl+Enter command to Process when using C# StandardInput redirection

c#,process,cmd,command-line-arguments,pos-tagger
Im trying to make C# application that uses hunpos tagger. Runing hunpos-tag.exe requires three input arguments: model, inputFile, outputFile In cmd it would look something like this: hunpos-tag.exe model <inputFile >outputFile Although, hunpos-tag.exe can be run with just the model, at that point it'll wait for text input (from cmd)...

## Writing text into and retrieving text from the text file using command line auguments

c++,text,command-line,command,command-line-arguments
Hello I want to write the output of my C++ Program in a text file using Command Line Argument then afterward retrieve it from the file . can you help me please I cannot get a satisfying code help.

## perl App::Cmd call subcommand from script

perl,command-line-arguments
I am trying to call a command line application implemented using App::Cmd from another script (without a system call). My application is taken from the tutorial for the package, having a a script yourapp: #!/usr/bin/perl use YourApp; an application class YourApp.pm: package YourApp; use App::Cmd::Setup -app; 1; and a command...

## trouble with str.isnumeric()

python,python-3.x,command-line-arguments,isnumeric
Im trying to test whether a command line argument is a number or not by using the isnumeric string method. It is to my understanding that it returns True if all characters are numeric and false if otherwise however when running it I seem to be getting True regardless of...

## Parsing command-line entries in C: implementing a shell

c,shell,command-line,command-line-arguments,command-line-parsing
I'm implementing a shell in C, and I ran into some problems parsing command-line entries. I want my parser method to separate command-line entries that are delimited by the whitespace character, and return the result as a double char pointer. ie, say I have "ls -l >ls.txt", my parser should...

## Change argparse usage message argument order

python,python-3.x,command-line-arguments,argparse
I'm using argparse in python3. In my script, I have some subparsers, a positional argument and some optional arguments. I have an optional argument to pass in any number of file paths, and it's using nargs='*'. The usage message for my script displays like this: usage: myprog.py subparser1 [-h] [--dir...

## Segfault for invalid long option

c,segmentation-fault,command-line-arguments,getopt,getopt-long
I have the following code: struct option longopts[] = { {"version", no_argument, 0, 'v'} }; if (argc > 1) { int c; int longindex; while ((c = getopt_long (argc, argv, "v", longopts, &longindex)) != -1) { switch (c) { case 'v': puts (VERSION_INFO); exit (0); case '?': exit (1); }...

## Python Command Line Arguments: Calling a function

python,command-line,command-line-arguments,argparse,optparse
So I'm stuck on a project I'm working on that involves the command line in python. So basically, here's what I'm trying to accomplish: I have a set of functions in a class, say, def do_option1(self, param1, param2) : #some python code here def do_option2(self, param1): #some python code here...

## Parameter checks in bash not testing correctly

linux,bash,command-line,command-line-arguments
I've been scratching my head about this for a while... I'm trying to get my code to react like: If no parameters, go to menu If more OR less than 4 parameters, call error and go to menu If exactly 4 parameters, write to file and exit I can't get...

## Expanding variables in a Windows batch file

batch-file,command-line-arguments,batch-processing,command-prompt
I run the following command in a Windows batch file: start "" "C:\PDF Viewer\PDFXCview.exe" /A "page=1&zoom=33.3" "G:\my pdfs\file 1.pdf" /A "page=4&zoom=55.5" "G:\my pdfs\file 2.pdf" The works perfectly fine and opens both PDF files using their respective parameters. However, to make the process cleaner, I would like to start using variables...

## Dealing with backslash as a command line argument in Python

python,string,command-line-arguments,backslash
I know about escaping backslashes in programming. However I'm passing in a command line argument into a Python program to parse. Whitespace is irrelevant, however via the command line, whitespace does matter. So I am trying to concatenate all argv[] arguments except the first element into a string to then...

## Testing for pipe or console standard input with ARGF

ruby,input,command-line-arguments
I have written a script that I would like to take input either from a pipe or by providing a filename as an argument. ARGF makes it easy to deal with this flexibly, except in the incorrect usage cases where neither is provided, in which case STDIN is opened and...

## How to Use Command Line Arguments to Dictate Flow of Program?

java,methods,command-line-arguments
I have scoured all of Google it seems and I cannot find anything regarding how to use command line arguments to tell the Java program which subsequent method to perform. I am trying to create a Java program with several different aspects of a student grading application. The main program...

## Iterative command line arguments in Python

python,command-line-arguments
I am working on Python 2.7.9 and using argparse module for command line arguments. I want to extend my code such that it should be able to take the command line arguments depending on the arguments already given by the user in the same command line. Lets say, the arguments...

## Accessing option data

python,command-line-arguments,options
I am trying to add an option to a Python program like so: optionParse= argparse.ArgumentParser(description='Change Number of Locations') optionParse.add_argument('-n') The -n option will allow the user to specify a number that will be used in the program. They will input it like this: myProgram.py -n 12 How would I access...

## Python handling options and args

python,arguments,command-line-arguments,options,getopt
I have written a python code and I want to handle switches and arguments. So I want to tell script: If you see -u then there is no -d <name> in arguments print "sth": if sys.argv=='-u' and sys.argv!='-d': print "You must use the -d switch!" sys.exit() Seems this is wrong...

## bash getopts validate options

linux,bash,scripting,command-line-arguments,getopts
I have following code in bash script: # argument validation and usage help usage() { cat << EOF usage: $0 options File Integrity Monitoring Script: OPTIONS: -b input file for [backup] -r input file for [diff report] -l list backup files EOF } if [$# -eq 0 ] then...

## How to embed commandline arguments in a execution command?

python,c++,command-line-arguments
I need to pass the commandline arguments of my C++ code as the commandline arguments of my python script. My code looks like: int main(int argc,char * argv[]) { FILE *in; char buff[512]; cout<<argv[1]; string str = "python comparescript.py "+argv[1]+" "+argv[2]+" "+argv[3]; if(!(in = popen(str, "r"))){ cout<<"Image Comparison made successful";...

## Options not parse as Argument in Unix

bash,command-line-arguments,getopt,getopts
I has an existing script which works on $1$2 $3, etc. I want to add an optional argument without disturbing the order. Do we have some ready made solution for: If a valid option (using getopts) is found, this index of argument should not be considered as argument.... ## Use$^I and supply arguments

perl,file,command-line,command-line-arguments
I am trying to perform some inplace editing. And I have a basic snippet that works for when I have hard coded substitute in place. I am trying to generalize the script by passing in variables now and it fails. my code use strict; use warnings; $^I = '.bak'; my... ## passing arguments to a cURL shell script file python,shell,curl,command-line-arguments I do not have much experience with shell or python scripts so I am looking for some help on how I can accomplish this. Goal: Pass arguments to a shell or python script file that will be used to perform either a cURL Post request or a python post request.... ## how to pass input and configurations files by using linux command c++,linux,parameters,command-line-arguments I have an executable file vs-vectorize for which I want to pass a file to analyze along side its configuration files. I am Very very new to linux so excuse my question. The file to analyze is in xml format: <doc id="E0211315"> <text> Gimme Dat For the Chris Brown song,... ## What are some use cases of “$*” in bash?

bash,parameters,arguments,command-line-arguments
From the bash man page: "$*" is equivalent to "$1c$2c...", where c is the first character of the value of the IFS variable. "[email protected]" is equivalent to "$1" "$2" ... Any example where "[email protected]" cannot work in place of "$*"?...

## how to execute a command using array containing strings with spaces linux

arrays,linux,bash,command-line-arguments

## How to read a text file in to a scanner using command line in Java

java,command-line,command-line-arguments
I have a small snippet of code that will ask user to type input such as 5 12 59 58 28 58 The first number will indicate the size of the array i need to create and the rest of the numbers will be stored in that array. So with...

## C++ How to pass command line argument to read txt file

c++,command-line-arguments
What I've been trying to do is... 1) to read txt files by command line argument, 2) to use strings in the txt files as arguments for the main method (or whatever method you need to invoke). For example, there are two txt files, one of which is named character.txt...

## Setting an environment variable on same line as program execution is different than setting it separately? - shell variables vs. environment variables

bash,shell,environment-variables,command-line-arguments
What is the difference between: prompt$TSAN_OPTIONS="suppressions=/somewhere/file" ./myprogram and prompt$ TSAN_OPTIONS="suppressions=/somewhere/file" prompt\$ ./myprogram The thread-sanitizer library gives the first case as how to get their library (used within myprogram) to read the file given in options. I read it, and assumed it was supposed to be two separate lines, so...

## Adjust exception message basing on missing information

python,python-2.7,command-line-arguments,python-2.x,command-line-parsing
Having such code: if __name__ == "__main__": parser.add_argument("--u_shape_dict", default="", action='store', help="required for ...") parser.add_argument("--v_shape_dict", default="", action='store', help="required for ...") u_shape_dict = args['u_shape_dict'] if not u_shape_dict: raise Exception('u_shape_dict is missing. Please provide it') v_shape_dict = args['v_shape_dict'] if not v_shape_dict: raise Exception('v_shape_dict is missing. Please provide it') I want to combine this...

## Maven install not respecting command line arguments

java,maven,command-line-arguments,pom.xml
I have a project which I am attempting to install with maven. The pom.xml has a few properties in it which are modified when the maven install command is run depending on whatever version of a library we are attempting to build with: <properties> <some-version>0</some-version> </properties> The zero here is...

## Does jar differentiate between program arguments and jvm arguments

java,jvm,command-line-arguments
I am trying to execute a jar file. It needs both program arguments and the jvm arguments. Do we need to do something different while passing the command line parameters in order for it to be able to differentiate them, or it will be handled automatically? Currently I am using...

## Passing arguments to a method in Rake Task [duplicate]

This question already has an answer here: How do I pass command line arguments to a rake task? 15 answers I have a Rake task wherein I am taking two arguments from command line and i need to pass those arguments to the method inside the task. How do...

## Cannot access private member declared in class 'CCustomCommandLineInfo'

c++,mfc,command-line-arguments
I am trying to add a command-line interface to an existing MFC application, and found a class online at this website. I have adapted it to my needs and when I try to build I get an error that reads "error C2248: 'CCustomCommandLineInfo::CCustomCommandLineInfo' : cannot access private member declared in...

## Running executable files using Haskell

Say there's a C++ code that I've compiled into an executable using: g++ test.cpp -o testcpp I can run this using Terminal (I'm using OS X), and provide an input file for processing inside the C++ program, like: ./testcpp < input.txt I was wondering if doing this is possible, from...

## Test if string represents “yyyy-mm-dd”

c++,command-line-arguments
I am working on a program that takes two command line arguments. Both arguments should be dates of the form yyyy-mm-dd. Since other folks will be using this program and it will be requesting from mysql, I want to make sure that the command line arguments are valid. My original...

## When reading command line arguments in Windows script, is there a way to escape the comma character?

batch-file,command-line,scripting,cmd,command-line-arguments
I am trying to read multiple input parameters from the command-line. The last one is expected to be a comma-separated list, but the script is only able to read the first word before the comma. That is, when I call the script: test.cmd a b c d,e,f %4 comes as...

## Create parser with subcommands in argparse, customize positional argument(s)

python,command-line-arguments,argparse
I'm very new to this module so please bear with me. I have the following code: reader.py import argparse parent_parser = argparse.ArgumentParser(description="Read text files.") parent_parser.add_argument('filename', help='TXT file', type=file, nargs='+') parent_parser.add_argument('--verbose', '-v', action='store_true', help="Verbosity on") child_parser = parent_parser.add_subparsers(title="subcommand", help="Subcommand help") new_file_command = child_parser.add_parser('new', help="New text file") edit_file_command =...

## Python Args not working correctly

python,command-line-arguments
I have this program that is supposed to allow the user to input a start/end arg as well as a file arg and then the program will open a txt file and read line line s starting and ending at the args. but if i type in 2 as the...

## Reading lines from .txt into batch file and handing into command line as arguments?

python,batch-file,command-line-interface,command-line-arguments
I need to read each line of a .txt file, line by line, handing in each line as an argument to a process I'm running in the CMD line interface. In the command line it would look like: "process c:/script.js arguments". I originally did this using Python: with open("C:\path\to\document.txt", "r")...