CODEWITHSUNDEEP
objective-ccocoamacosunixcommand-line
Tom
Tom

Reputation: 7091

Cocoa/ Objective-C Shell Command Line Execution

This is probably a stupid question, but how can I execute a shell command from my Cocoa app?

I have the command as a string "command", but can easily manipulate data as needed.

There is no need to get a returned output value.

Upvotes: 18

Views: 22094

Answers (3)

Quinn Taylor
Quinn Taylor

Reputation: 44769

NSTask is pretty easy to do this with. For a synchronous call, you can use something like this fragment:

NSString *path = @"/path/to/executable";
NSArray *args = [NSArray arrayWithObjects:..., nil];
[[NSTask launchedTaskWithLaunchPath:path arguments:args] waitUntilExit];

The -waitUntilExit call makes sure it finishes before proceeding. If the task can be asynchronous, you can remove that call and just let the NSTask do it's thing.

Upvotes: 30

BJ Homer
BJ Homer

Reputation: 49054

If you just want to run something and don't care about the output or return code (for example, you want to touch a file), you can just do

system("touch myfile.txt");

Easy as that.

Upvotes: 9

Terry Wilcox
Terry Wilcox

Reputation: 9040

NSTask

Using the NSTask class, your program can run another program as a subprocess and can monitor that program’s execution.

Upvotes: 3

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