go syscall bug

strace-on-amd64.txt

go version go1.9 linux/amd64 (from Debian unstable)

$ strace ./test 2>&1|grep ioctl
ioctl(0, TCGETS, {B9600 opost isig icanon echo ...}) = 0
ioctl(0, TCGETS, {B9600 opost isig icanon echo ...}) = 0



go version go1.8.1 gccgo (Debian 7.2.0-1) 7.2.0 linux/amd64
$ strace ./test 2>&1|grep ioctl
ioctl(0, TCGETS, {B9600 opost isig icanon echo ...}) = 0
ioctl(0, TCGETS, {B9600 opost isig icanon echo ...}) = 0

strace-on-ppc64le.txt

go version go1.9 linux/ppc64le (from Debian unstable)

$ strace ./test 2>&1|grep ioctl
ioctl(0, TCGETS, {B38400 opost isig icanon echo ...}) = 0
ioctl(0, _IOC(_IOC_READ, 0x74, 0x13, 0x3c), 0xc208014080) = -1 ENOTTY (Inappropriate ioctl for device)



go version go1.8.1 gccgo (Debian 7.2.0-2) 7.2.0 linux/ppc64le

$ strace ./test 2>&1|grep ioctl
ioctl(0, TCGETS, {B38400 opost isig icanon echo ...}) = 0
ioctl(0, _IOC(_IOC_READ, 0x74, 0x13, 0x3c), 0xc208014080) = -1 ENOTTY (Inappropriate ioctl for device)

syscall-test.go

package main

/*
#include<unistd.h>
*/
import "C"
import (
	"syscall"
	"unsafe"
)

func main() {
	C.isatty(C.int(0))
	var termios syscall.Termios
	syscall.RawSyscall(syscall.SYS_IOCTL, 0, uintptr(syscall.TCGETS), uintptr(unsafe.Pointer(&termios)))
}