I'm trying to figure out if it's possible to start an executeable and wait for it to close. I have f...

# kotlin-native

[Kroppeb]

I'm trying to figure out if it's possible to start an executeable and wait for it to close. I have found https://stackoverflow.com/questions/51460921/kotlin-native-execute-an-executable, but that uses the "exec" family which won't return after the process is finished it seems?

[Kroppeb]

Looking a it furter, It seems I could fork and then exec, but that leaves the issue of waiting for the exit of the child process

[msink]

system
https://pubs.opengroup.org/onlinepubs/9699919799/functions/system.html

[Kroppeb]

Thank you so much

[aleksey.tomin]

If your application run on posix you can run and read program output by popen("your program", "r") something like

return sequence {
            val fp: CPointer<FILE>? = requireNotNull(popen(command, "r"))
            try {
                val buffer = ByteArray(4096)
                while (true) {
                    val scan = fgets(buffer.refTo(0), buffer.size, fp)
                    if (scan != null && scan != NULL) {
                        yield(scan.toKString())
                    } else {
                        break
                    }
                }
            } finally {
                pclose(fp)
            }
        }

[Kroppeb]

that piece of code is to read files no?

[Kroppeb]

anyway, was still helpful, cause I just realised i forgot to call fclose

[aleksey.tomin]

It reads output of posix program. Try it gor “ls” 😉

[Kroppeb]

huh

[Kroppeb]

In my case I just need to wait for it to end so system will probably work fine 😃