Merge pull request #1645 from 18F/wml-cross-platform-syscalls

Breakout syscalls based on build target so app can be built cross platform

api/cmd/syscalls_bsd.go

@@ -0,0 +1,8 @@
+// +build darwin freebsd netbsd openbsd solaris dragonfly
+
+package cmd
+
+import "syscall"
+
+const ioctlReadTermios = syscall.TIOCGETA
+const ioctlWriteTermios = syscall.TIOCSETA

api/cmd/syscalls_linux.go

@@ -0,0 +1,8 @@
+// +build linux
+
+package cmd
+
+import "syscall"
+
+const ioctlReadTermios = syscall.TCGETS
+const ioctlWriteTermios = syscall.TCSETS

api/cmd/webclient.go

@@ -188,7 +188,7 @@ func echo(visible bool) {
 	var termios = &syscall.Termios{}
 	var fd = os.Stdout.Fd()
 
-	if _, _, err := syscall.Syscall(syscall.SYS_IOCTL, fd, syscall.TCGETS, uintptr(unsafe.Pointer(termios))); err != 0 {
+	if _, _, err := syscall.Syscall(syscall.SYS_IOCTL, fd, ioctlReadTermios, uintptr(unsafe.Pointer(termios))); err != 0 {
 		return
 	}
 
@@ -198,7 +198,7 @@ func echo(visible bool) {
 		termios.Lflag &^= syscall.ECHO
 	}
 
-	if _, _, err := syscall.Syscall(syscall.SYS_IOCTL, fd, syscall.TCSETS, uintptr(unsafe.Pointer(termios))); err != 0 {
+	if _, _, err := syscall.Syscall(syscall.SYS_IOCTL, fd, ioctlWriteTermios, uintptr(unsafe.Pointer(termios))); err != 0 {
 		return
 	}
 }