System Commands for UNIX

At a certain point in my c code I want to run a program in the same directory. Then immediately return control back to code. What command and paramaters do I need to use? Thanks.

-Carl

Do you mean that you want to run the application in the background?

If so, just compile the code normally, and add "&" to the back of the command, e.g.:

Code:

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$ myprog &

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That will run myprog as a background task, and as long as myprog doesn't require input from the stdin stream, that should be fine.

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Mats

In my c code how do I force another program in the same directory as my code to run before I continue. I need another file to update (which executing the program does) so the data my current code will work on is up to date. I hope that makes sense. Thanks.

-Carl

Quote:

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Originally Posted by cjohnman

In my c code how do I force another program in the same directory as my code to run before I continue. I need another file to update (which executing the program does) so the data my current code will work on is up to date. I hope that makes sense. Thanks.

-Carl

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Code:

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system("/some/prog/to/run");

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The tricky part is finding the directory where your program is stored. This is not as simple as it sounds.

Generally, I would use a shell-script, something where you just "list" the commands you need to execute, e.g.

Code:

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#!/bin/sh    # This is a "magic" for "This is a shell-script".
prog1          # first program to run
prog2          # second program to run.

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It's much more easy (and easier to change later) to use a shell-script than to write C code to do the same work.

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Mats

Thanks for your help!