1 files changed, 74 insertions, 0 deletions
diff --git a/src/go/collectors/go.d.plugin/modules/nvme/init.go b/src/go/collectors/go.d.plugin/modules/nvme/init.go
new file mode 100644
index 000000000..44ff90f4e
--- /dev/null
+++ b/src/go/collectors/go.d.plugin/modules/nvme/init.go
@@ -0,0 +1,74 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+package nvme
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"os"
+	"os/exec"
+	"path/filepath"
+)
+
+func (n *NVMe) validateConfig() error {
+	if n.BinaryPath == "" {
+		return errors.New("'binary_path' can not be empty")
+	}
+
+	return nil
+}
+
+func (n *NVMe) initNVMeCLIExec() (nvmeCLI, error) {
+	if exePath, err := os.Executable(); err == nil {
+		ndsudoPath := filepath.Join(filepath.Dir(exePath), "ndsudo")
+
+		if fi, err := os.Stat(ndsudoPath); err == nil {
+			// executable by owner or group
+			if fi.Mode().Perm()&0110 != 0 {
+				n.Debug("using ndsudo")
+				return &nvmeCLIExec{
+					ndsudoPath: ndsudoPath,
+					timeout:    n.Timeout.Duration(),
+				}, nil
+			}
+		}
+	}
+
+	// TODO: remove after next minor release of Netdata (latest is v1.44.0)
+	// can't remove now because it will break "from source + stable channel" installations
+	nvmePath, err := exec.LookPath(n.BinaryPath)
+	if err != nil {
+		return nil, err
+	}
+
+	var sudoPath string
+	if os.Getuid() != 0 {
+		sudoPath, err = exec.LookPath("sudo")
+		if err != nil {
+			return nil, err
+		}
+	}
+
+	if sudoPath != "" {
+		ctx1, cancel1 := context.WithTimeout(context.Background(), n.Timeout.Duration())
+		defer cancel1()
+
+		if _, err := exec.CommandContext(ctx1, sudoPath, "-n", "-v").Output(); err != nil {
+			return nil, fmt.Errorf("can not run sudo on this host: %v", err)
+		}
+
+		ctx2, cancel2 := context.WithTimeout(context.Background(), n.Timeout.Duration())
+		defer cancel2()
+
+		if _, err := exec.CommandContext(ctx2, sudoPath, "-n", "-l", nvmePath).Output(); err != nil {
+			return nil, fmt.Errorf("can not run '%s' with sudo: %v", n.BinaryPath, err)
+		}
+	}
+
+	return &nvmeCLIExec{
+		sudoPath: sudoPath,
+		nvmePath: nvmePath,
+		timeout:  n.Timeout.Duration(),
+	}, nil
+}