Initial 2024-01-26

cmpSnipper/cmpSnipperSnipPing.go

@@ -0,0 +1,70 @@
+
+	package cmpSnipper
+
+	import (
+		"os/exec"
+		"context"
+		"time"
+		"strings"
+		"syscall"
+	)
+
+	func (app *App) PingSnip(parm any) (any, error) {
+		// log.Println("PingSnip")
+
+		path, err := exec.LookPath("ping")
+
+		app.Log("Prog:", path)
+
+		if err != nil {
+			return map[string]interface{}{
+				"retval"   : 127,
+				"error"    : "No prog",
+			}, nil
+		}
+
+		ctx, cancel := context.WithTimeout(context.Background(), 10 * time.Second)
+
+		defer cancel()
+
+		cmd := exec.CommandContext(ctx, "ping", "-c", "4", "8.8.8.8")
+
+		cmd.Stdin = strings.NewReader("")
+
+		var stdout strings.Builder
+		cmd.Stdout = &stdout
+
+		var stderr strings.Builder
+		cmd.Stderr = &stderr
+
+		var exitCode int;
+
+		err = cmd.Run()
+
+		 if err != nil {
+			// try to get the exit code
+			if exitError, ok := err.(*exec.ExitError); ok {
+				ws := exitError.Sys().(syscall.WaitStatus)
+				exitCode = ws.ExitStatus()
+			} else {
+				// This will happen (in OSX) if `name` is not available in $PATH,
+				// in this situation, exit code could not be get, and stderr will be
+				// empty string very likely, so we use the default fail code, and format err
+				// to string and set to stderr
+
+				app.Log("Could not get exit code for failed program")
+				exitCode = 255
+			}
+		} else {
+			// success, exitCode should be 0 if go is ok
+			ws := cmd.ProcessState.Sys().(syscall.WaitStatus)
+			exitCode = ws.ExitStatus()
+		}
+
+		return map[string]interface{}{
+			"retval"	: exitCode,
+			"error"		: err,
+			"stdout"	: stdout.String(),
+			"stderr"	: stderr.String(),
+		}, nil
+	}