vendor: cilium/ebbf 4032b1d8aae306b7bb94a2a11002932caf88c644

full diff: 60c3aa43f4...4032b1d8aa

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

vendor/github.com/cilium/ebpf/internal/errors.go

@@ -0,0 +1,50 @@
+package internal
+
+import (
+	"bytes"
+	"fmt"
+	"strings"
+
+	"github.com/cilium/ebpf/internal/unix"
+	"github.com/pkg/errors"
+)
+
+// ErrorWithLog returns an error that includes logs from the
+// kernel verifier.
+//
+// logErr should be the error returned by the syscall that generated
+// the log. It is used to check for truncation of the output.
+func ErrorWithLog(err error, log []byte, logErr error) error {
+	logStr := strings.Trim(CString(log), "\t\r\n ")
+	if errors.Cause(logErr) == unix.ENOSPC {
+		logStr += " (truncated...)"
+	}
+
+	return &loadError{err, logStr}
+}
+
+type loadError struct {
+	cause error
+	log   string
+}
+
+func (le *loadError) Error() string {
+	if le.log == "" {
+		return le.cause.Error()
+	}
+
+	return fmt.Sprintf("%s: %s", le.cause, le.log)
+}
+
+func (le *loadError) Cause() error {
+	return le.cause
+}
+
+// CString turns a NUL / zero terminated byte buffer into a string.
+func CString(in []byte) string {
+	inLen := bytes.IndexByte(in, 0)
+	if inLen == -1 {
+		return ""
+	}
+	return string(in[:inLen])
+}