How to read the Values of argc and argv in main function (c) from file?

Question

I want for main function in c program, read argc and argv from file.

How to read argv and argc from file in C language?

For example:

./prog --test=cpu --prime=1000 run

Change to:

./prog file.txt

File.txt is:

--test=cpu --prime=1000 run

Prog is a very big program.

Paul R · Accepted Answer · 2022-03-15 11:27:59Z

3

You don't need to change the program, you can just do something like this:

./prog $(cat file.txt)

(assumung bash or similar shell).

answered Mar 15, 2022 at 11:27

Paul R

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4 Comments

DevSolar Over a year ago

This also works for Windows PowerShell, by the way. If you are looking for something that works that way on cmd.exe, though, you are out of luck. ;-)

Zahra Heydari Over a year ago

I need to change the program. Because cat in ./prog $(cat file.txt) causes the same inputs to be placed next to ./prog and I have trouble executing this binary in another program. Because the flags or arguments of the other program interfere with this binary.

Paul R Over a year ago

@ZahraHeydari: sorry, that doesn't make any sense. Please edit your question to explain the underlying problem.

DevSolar Over a year ago

@ZahraHeydari: You did not say anything about another program before...?

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