software: Implement serial port detection

1 files changed, 28 insertions, 0 deletions

diff --git a/software/vendor/github.com/creack/goselect/select.go b/software/vendor/github.com/creack/goselect/select.go
new file mode 100644
index 0000000..7f2875e
--- /dev/null
+++ b/software/vendor/github.com/creack/goselect/select.go
@@ -0,0 +1,28 @@
+package goselect
+
+import (
+	"syscall"
+	"time"
+)
+
+// Select wraps syscall.Select with Go types
+func Select(n int, r, w, e *FDSet, timeout time.Duration) error {
+	var timeval *syscall.Timeval
+	if timeout >= 0 {
+		t := syscall.NsecToTimeval(timeout.Nanoseconds())
+		timeval = &t
+	}
+
+	return sysSelect(n, r, w, e, timeval)
+}
+
+// RetrySelect wraps syscall.Select with Go types, and retries a number of times, with a given retryDelay.
+func RetrySelect(n int, r, w, e *FDSet, timeout time.Duration, retries int, retryDelay time.Duration) (err error) {
+	for i := 0; i < retries; i++ {
+		if err = Select(n, r, w, e, timeout); err != syscall.EINTR {
+			return err
+		}
+		time.Sleep(retryDelay)
+	}
+	return err
+}