Merge branch 'master' into jcarr

1 files changed, 99 insertions, 0 deletions

diff --git a/cmds/gui-example/os.go b/cmds/gui-example/os.go
new file mode 100644
index 0000000..ce5db8d
--- /dev/null
+++ b/cmds/gui-example/os.go
@@ -0,0 +1,99 @@
+package main
+
+import "log"
+import "strings"
+import "os"
+import "os/exec"
+import "io/ioutil"
+import "errors"
+// import "bufio"
+
+// import "github.com/davecgh/go-spew/spew"
+
+/*
+import "time"
+import "runtime"
+import "runtime/debug"
+import "runtime/pprof"
+
+import "git.wit.org/wit/gui"
+import "git.wit.org/wit/shell"
+import "github.com/gobuffalo/packr"
+*/
+
+func runSimpleCommand(s string) {
+	cmd := strings.TrimSpace(s) // this is like 'chomp' in perl
+	cmd  = strings.TrimSuffix(cmd, "\n") // this is like 'chomp' in perl
+        cmdArgs := strings.Fields(cmd)
+	runLinuxCommand(cmdArgs)
+}
+
+var geom string = "120x30+500+500"
+
+func xterm(cmd string) {
+	var tmp []string
+	var argsXterm = []string{"nohup", "xterm", "-geometry", geom}
+	tmp = append(argsXterm, "-hold", "-e", cmd)
+	log.Println("xterm cmd=", cmd)
+	go runCommand(tmp)
+}
+
+func runCommand(cmdArgs []string) {
+	log.Println("runCommand() START", cmdArgs)
+	process := exec.Command(cmdArgs[0], cmdArgs[1:len(cmdArgs)]...)
+	// process := exec.Command("xterm", "-e", "ping localhost")
+	log.Println("runCommand() process.Start()")
+	process.Start()
+	log.Println("runCommand() process.Wait()")
+	err := process.Wait()
+	lookupError(err)
+	log.Println("runCommand() NEED TO CHECK THE TIME HERE TO SEE IF THIS WORKED")
+	log.Println("runCommand() OTHERWISE INFORM THE USER")
+	log.Println("runCommand() END", cmdArgs)
+}
+
+func lookupError(err error) {
+	var (
+		ee *exec.ExitError
+		pe *os.PathError
+	)
+
+	if errors.As(err, &ee) {
+		log.Println("ran, but non-zero exit code =", ee.ExitCode()) // ran, but non-zero exit code
+	} else if errors.As(err, &pe) {
+		log.Printf("os.PathError = %v", pe) // "no such file ...", "permission denied" etc.
+	} else if err != nil {
+		log.Printf("something really bad happened general err = %v", err) // something really bad happened!
+		if exitError, ok := err.(*exec.ExitError); ok {
+			log.Printf("exitError.ExitCode() is %d\n", exitError.ExitCode())
+		}
+	} else {
+		log.Println("success! // ran without error (exit code zero)")
+	}
+}
+
+func runLinuxCommand(cmdArgs []string) (string, error) {
+	process := exec.Command(cmdArgs[0], cmdArgs[1:len(cmdArgs)]...)
+
+	process.Stdin = os.Stdin
+	process.Stderr = os.Stderr
+
+	stdOut, err := process.StdoutPipe()
+	if err != nil {
+		return "", err
+	}
+
+	if err := process.Start(); err != nil {
+		return "", err
+	}
+
+	bytes, err := ioutil.ReadAll(stdOut)
+	if err != nil {
+		return "", err
+	}
+	err = process.Wait()
+	lookupError(err)
+
+	log.Println(string(bytes))
+	return string(bytes), err
+}