Class TShellCommand

util/system/shellcommand.h:352–496

* @brief Execute command in shell and provide its results * @attention Not thread-safe */

 * @attention Not thread-safe
 */
class TShellCommand: public TMoveOnly {
private:
    TShellCommand();

public:
    enum ECommandStatus {
        SHELL_NONE,
        SHELL_RUNNING,
        SHELL_FINISHED,
        SHELL_INTERNAL_ERROR,
        SHELL_ERROR
    };

public:
    /**
     * @brief create the command with initial arguments list
     *
     * @param cmd binary name
     * @param args arguments list
     * @param options execution options
     * @todo store entire options structure
     */
    TShellCommand(const TStringBuf cmd, const TList<TString>& args, const TShellCommandOptions& options = TShellCommandOptions(),
                  const TString& workdir = TString());
    TShellCommand(const TStringBuf cmd, const TShellCommandOptions& options = TShellCommandOptions(), const TString& workdir = TString());
    ~TShellCommand();

public:
    /**
     * @brief append argument to the args list
     *
     * @param argument string argument
     *
     * @return self
     */
    TShellCommand& operator<<(const TStringBuf argument);

    /**
     * @brief return the collected output from the command.
     * If the output stream is set, empty string will be returned
     *
     * @return collected output
     */
    const TString& GetOutput() const;

    /**
     * @brief return the collected error output from the command.
     * If the error stream is set, empty string will be returned
     *
     * @return collected error output
     */
    const TString& GetError() const;

    /**
     * @brief return the internal error occured while watching
     * the command execution. Should be called if execution
     * status is SHELL_INTERNAL_ERROR
     *