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To prepare to use make, you must write a file called the makefile that describes the relationships among files in your program, and the states the commands for updating each file. In a program, typically the executable file is updated from object files, which are in turn made by compiling source files.
Linux system is derived from Unix and it is a continuation of the basis of Unix design. Linux distributions are the most famous and healthiest example of the direct Unix derivatives. BSD (Berkley Software Distribution) is also an example of a Unix derivative.
Unix commands are inbuilt programs that can be invoked in multiple ways. Here, we will work with these commands interactively from a Unix terminal. A Unix terminal is a graphical program that provides a command-line interface using a shell program.
To create a new file run the cat command followed by the redirection operator > and the name of the file you want to create. Press Enter type the text and once you are done press the CRTL+D to save the files.
I currently am tasked with creating some command-line helper utilities for our internal development team to use. However, I want to know the best practice for creating unix command-line tools. I have tried viewing git source code for an example of how to read parameters and display messages accordingly. However, I'm looking for a clear template for creating a tool, reading parameters safely, and displaying the standard "help" messages if a user types in an incorrect parameter or --help I want to show the help message. Is there a standard library for reading -abcFGH and --parameter and switching which process starts based upon the passed parameter?
Command-Line:
git
or
git --help
Output:
usage: git [--version] [--exec-path[=<path>]] [--html-path] [--man-path] [--info-path]
[-p|--paginate|--no-pager] [--no-replace-objects] [--bare]
[--git-dir=<path>] [--work-tree=<path>] [--namespace=<name>]
[-c name=value] [--help]
<command> [<args>]
...
Command-Line:
MyTool CommandName --CommandArgs
Output:
Whatever that specific command does.
What I have working so far:
Code:
int main(int argc, char **argv)
{
if(argc < 2)
helpMessage();
char* commandParameter = argv[1];
if (strncmp(argv [1],"help", strlen(commandParameter)) == 0)
helpMessage();
else if (strncmp(argv [1],"pull", strlen(commandParameter)) == 0)
pull();
else
helpMessage();
}
What would be ideal would look like this:
Code:
int main(int argc, char **argv)
{
MagicParameters magicParameters = new MagicParameters(argv);
switch(magicParameters[1])
{
case command1:
Command1();
break;
case ...
case help:
default:
HelpMessage();
break;
}
}
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