Has anyone had success calling `platform.posix.isa...

# kotlin-native

[AJ Alt]

Has anyone had success calling platform.posix.isatty from K/N? It seems that isatty(STDIN_FILENO) always returns 0 on my machine (calling the built binary directly, not though gradle). Calling isatty(fileno(stdout)) in the same way from a C program returns the expected values.

[olonho]

nike@~/kotlin/2kotlin-native
>cat isa.kt
import platform.posix.*

fun main() {
  println(isatty(STDIN_FILENO))
}
nike@~/kotlin/2kotlin-native
>./dist/bin/konanc isa.kt -o i
nike@~/kotlin/2kotlin-native
>./i.kexe 
1
nike@~/kotlin/2kotlin-native
>uname -a
Darwin iMac-Nikolay.local 18.7.0 Darwin Kernel Version 18.7.0: Sat Oct 12 00:02:19 PDT 2019; root:xnu-4903.278.12~1/RELEASE_X86_64 x86_64

[olonho]

what is your OS?

[napperley]

On Linux X64 the result is 1 (same result in both IntelliJ's Terminal and Gnome Terminal on Linux Mint 19.3), which is the same as Nikolay's program.

[Kavan]

Fedora Rawhide K/N compiler 1.4.0 it return 0 from idea

[Kavan]

It returns 1 if I run build executable on terminal

[AJ Alt]

Hm, I'm using the mingw target on windows, maybe that has something to do with it?

[olonho]

Maybe you compile for different subsystem? Using appropriate Win32 API could be better here.

[AJ Alt]

Hm, I just tried using the windows version, _isatty(STDIN_FILENO), and still only get 0

[olonho]

Also see https://mail.openvswitch.org/pipermail/ovs-dev/2017-June/333625.html

[AJ Alt]

That patch seems to be checking for false-positives, where isatty is returning 1 when they expect 0. I'm experiencing the opposite case.

[AJ Alt]

And it doesn't happen when compiling C code with mingw directly.