Initial code commit

back/cmd.go

@@ -0,0 +1,32 @@
+package back
+
+import (
+	"bufio"
+	"io"
+	"os"
+	"os/exec"
+)
+
+// WriteToStdin is a utility function that writes a string to a command's stdin.
+func WriteToStdin(cmd *exec.Cmd, input string) {
+	stdin, err := cmd.StdinPipe()
+	if err != nil {
+		PrintError("Failed to access stdin for system command: "+err.Error(), ErrorOther, true)
+	}
+
+	go func() {
+		defer func(stdin io.WriteCloser) {
+			_ = stdin.Close() // error ignored; if stdin could be accessed, it can probably be closed
+		}(stdin)
+		_, _ = io.WriteString(stdin, input)
+	}()
+}
+
+// ReadFromStdin is a utility function that reads a string from stdin.
+func ReadFromStdin() string {
+	scanner := bufio.NewScanner(os.Stdin)
+	if scanner.Scan() {
+		return scanner.Text()
+	}
+	return ""
+}