FAQ Database Discussion Community

## 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";...

## 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...

## segmentation fault and argv, argc

c,segmentation-fault,command-line-arguments
I made a code that prints out the input: int main(int argc, char *argv[]) { printf("%c", *argv[1]); return 0; } When I put something like ab, abcdef, ac, *cf, it works well, but when I put ** or $$it returns 2, and when I put a, k, and so... ## Why does Scala ignore exclamation points in command line arguments? scala,command-line-arguments If I write a Scala script (or App) that just prints out the command line arguments, I notice that it ignores all the '!' characters. For example, if my script looks like: println(args(0)) And I run it with: scala MyScript "Hello!" I get the output: Hello And if I run... ## 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... ## 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 interate through command line arguments saved in a variable? bash,iteration,command-line-arguments At some point in my script I need to save value of all command line arguments in a variable (after some shifting), it looks like this: foo="@" Now I need to interate through the arguments from foo variable, but it seems to be quite hard to do it properly if... ## 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... ## how do I know what n(positive integer) is when user types ./a.out -n? c,command-line-arguments How do I make an command line argument a variable? That is, for example, how do I know what n(positive integer) is when user types ./a.out -n? I know I can use strcmp(argv[1], "-1") strcmp(argv[1], "-100") but is there a simpler way to implement this?... ## 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... ## Run python script with some of the argument that are optional python,command-line-arguments,argparse,sys I have gone through the sys documentation, however there is something that is still unclear to me. I have looked for some similar question on stackoverflow, but I haven't find anything useful (clearly any reference is appreciated!). I want to create a script - say foo.py - in which I... ## Updating Ubuntu 11.04 to 12.04 preferrably through command line linux,command-line,installation,command-line-arguments,updates 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 can I easily create a python argparse argument with an inverse? python-3.x,command-line-arguments,argparse Using argparse with Python 3, I'd like to create a complementary pair of arguments: --log-file=~/some-default-log-filename.txt --no-log-file As the example implies, by default the log file arguments would have a default value (a filename). You could change that by specifying a different string value to --log-file, or remove the log file... ## C# Regex command-line argument parsing with single hyphen word wrapping inside argument names c#,regex,parsing,command-line-arguments I am developing an opensource/libre command-line parser for .NET which will be restrictive but clear. It seemed to be an easy task at first but for 2 days being trapped with regex problems, not so fun. :( I've been reading hours of tutorials about word matching and grouping but it... ## 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... ## Command line option for PuTTY (Windows) to set action of mouse buttons to xterm? windows,command-line-arguments,putty As per the title, I'm looking for a command line option which will have the effect of clicking xterm under "Window > Selection > Control use of mouse" in the PuTTY configuration window. I can't see anything in the standard command line options in the PuTTY docs and I'm trying... ## 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);... ## 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 =... ## Create index.php file in directory [closed] c#,file,directory,command-line-arguments I want to write a program to be added to the right-click menu and when I run the program from the right-click menu to create an index.php file in current directory! Exmaple: I go to C:\wamp\www Then I right-click somewhere and want to choose create index.php This should create a... ## C++ Unexpected calculation in program c++,function,arguments,command-line-arguments When my program is ran with a command line argument like 60, the first calculation is wrong but the rest seem to be correct. I think I have a bug in the main() function but I cannot find it. On Linux 60 gives ~30000 steps and on Windows it shows... ## How to add command line argument to a web application(Spring MVC) web-applications,wsdl,cxf,command-line-arguments I'm working on a web project that uses Apache CXF and web services, which i use to hit a request to server and get the response back. The server(Actually the service provider) had given me some username and password. Now, when I run my request as a java application... ## Bash Script: options - case: range of multiple numbers linux,bash,case,command-line-arguments,optional-arguments I'm working on a script in Linux Bash, with different kinds of options to use. Basically, the program is going to ping to the given ip-address. Now, I want to enable the user to write a range of ip-adresses in the terminal, which the program then will ping. Fe: bash... ## 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... ## CMake: Adding command line arugments to project cmake,command-line-arguments My question is somewhat similar to this SO but not the same. I created a HelloWorld program with the following: add_executable( HelloWorld {SRC} ) When I generate a project file (for example a Visual Studio .sln file, or a XCode .xcodeproj file). I want to hit the run button and... ## Running executable files using Haskell shell,haskell,command-line-arguments,executable 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... ## 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 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... ## Use numeric value of input argument in Bash script [duplicate] linux,bash,command-line-arguments This question already has an answer here: Brace expansion with variable? 5 answers I would like to use the numeric value of the input argument that I pass to a bash script like this: ./script_pb3.sh out.txt 3 Here I would like to take the second argument that I pass... ## 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... ## 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... ## 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... ## 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.... ## Calling a Powershell script with the “-command” parameter instead of “-file” powershell,command-line,command-line-arguments What is the difference between calling a powershell script like this: powershell.exe -file "myfile.ps1" and like this (which also works): powershell.exe -command "myfile.ps1" thanks, robert... ## 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... ## 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... ## Best way to access image files to improve performance c#,vb.net,image,performance,command-line-arguments I am using a graphicmagick.exe (command tool) to convert the file from one format to another format: In that, I used to pass input path and output path for conversion as aruguments. Now I am looping a directory using foreach and passing the input file one by one and converting... ## 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... ## 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... ## bash interactive script pass input bash,command-line-arguments I'm running the following interactive Jar. java -jar script.jar argument-line-here \n Now I'm creating a bash script which runs the jar file. How do I pass the argument line and the conformation "\n" to this interactive script? these are input lines for the script. This question has some answers, expect... ## 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... ## Trying to read string “$$” from command line arguments

c++,string,char,command-line-arguments
I'm trying to get a string from the command line arguments, one of the arguments I'm trying to use is "$$". The argument resides in argv[2]. My program reads "" fine (argv[2] = ""), but when "$$" is used, argv[2] = "29628".... What's going on here? ...

## How to make “if” condition change automatically depending on Command Line Argument in Java?

java,if-statement,command-line-arguments
In my code, if condition should change depending on command line argument. For example in the code below: int a = Integer.parseInt(args[0]); for (int i = 0; i < 100000; i++) { if (a == 2) if ((i % 25 == 0) || ((i+1) % 25 == 0) // do...

## 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...

## How to make a short and long version of a required argument using Python Argparse?

python,command-line-arguments,argparse
I want to specify a required argument called inputdir but I also would like to have a shorthand version of it called i. I don't see a concise solution to do this without making both optional arguments and then doing my own check. Is there a preferred practice for this...

## 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...

## 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); }...

## 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)...

## 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...

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

bash,shell,command-line-arguments

## How can I append the values from an input file to the command line options using argparse?

python,command-line-arguments,argparse
Say I have a yaml input file (input.txt) that contains the following: names: [Bob, Jill] ages: [22, 31] county: somewhere my code to parse this: import yaml import argparse parser = argparse.ArgumentParser() parser.add_argument('--name', default=[], dest='names', action='append') parser.add_argument('--age', default=[], dest='ages', action='append') parser.add_argument('--county', dest='county') parser.add_argument( '--config-file', dest='config_file', type=argparse.FileType(mode='r')) args = parser.parse_args() print...

## Passing multiple arguments as comman line args

arrays,vb.net,command-line-arguments
I am calling one .NET app from another using Process.Start and passing in a bunch of strings as command line arguments: startInfo.Arguments = String.Join(""" """, MyArray) Dim p As Process = Process.Start(startInfo) My intent is to pass in something like: "first value" "second value" "third value" and retrieve from within...

## 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... ## 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... ## 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... ## Golang command arguments empty causing error go,command-line-arguments I'm writing a go program and I need to use command arguments. However if I don't pass arguments when I run the executable or go run gosite.go the code it does the following runtime error. panic: runtime error: index out of range goroutine 1 [running]: runtime.panic(0x80c8540, 0x816d4b7) /usr/lib/go/src/pkg/runtime/panic.c:266 +0xac main.main()... ## Passing command line argument from the terminal with apostrophe or quote bash,command-line-arguments I have seen questions about passing arguments with quotes to a shell script (e.g., this question). My situation is slightly different: I am passing an argument to my java program from the bash terminal. The number of possible arguments is finite (20, to be precise), and one of them is... ## 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... ## 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.... ## 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")... ## Passing array of arguments to Quartz Scheduler java,command-line-arguments,quartz-scheduler I am trying to add a Quartz Scheduler to an existing Java class. The class uses String[] args as input from the main function. public static void main(String[] args) { //validate(args); summarizeData(args); } But then the Java class implements Job, and it has to use the execute method which only... ## 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,... ## 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...

## Using “extends” correctly to display inheritance in a Commandline argument

java,inheritance,command-line-arguments
The user is supposed to input a name, a last name, and the age in that order into the commandline, and it displays into a JoptionPlane. It then displays again with a Dr. in front of the arguments with the age increased by 1. However I am having trouble with...

## Manage multiple following positional argument with argparse

python,command-line-arguments,argparse,args
I'm using this lib for parsing arguments in python : https://docs.python.org/2/library/argparse.html So far I have this: prog arg1 [-s arg2 [arg2 ...]] [-m arg3 [arg3 ...]] And I want this: prog arg1 -s arg2 [arg2 ...] -m arg3 [arg3 ...] Here is my python code: parser = argparse.ArgumentParser() parser.add_argument('path', type=str,...

## How do I show processes for a specific uid or username using command line in python?

python,process,command-line-arguments
for opt, arg in opts: if opt in ('-u'): arg = numuid ps = subprocess.Popen('ps -u ', shell=True, stdout=subprocess.PIPE) print ps.stdout.read() this is what i have so far, numuid is supposed to go after ps -u and is the uid. but what do i do to have it read in...

## 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...

## Using Net.exe, how do you add a user group with a 'Description' field as shown in Windows Computer Management?

windows,command-line-arguments
I knew how to add a user group using net.exe: net localgroup/group madeupgroupname /add This simple question was eluding me, perhaps because it is obvious: "How do you do this, and change the description that appears when you view the groups in computer management?" I saw the code: net localgroup/group...

## 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...

## Parsing exclusive groups in Python

python,command-line-arguments,argparse