Function launch_specified_editor

editor.c:60–125

}

static int launch_specified_editor(const char *editor, const char *path,
				   struct strbuf *buffer, const char *const *env)
{
	if (!editor)
		return error("Terminal is dumb, but EDITOR unset");

	if (strcmp(editor, ":")) {
		struct strbuf realpath = STRBUF_INIT;
		struct child_process p = CHILD_PROCESS_INIT;
		int ret, sig;
		int print_waiting_for_editor = advice_enabled(ADVICE_WAITING_FOR_EDITOR) && isatty(2);

		if (print_waiting_for_editor) {
			/*
			 * A dumb terminal cannot erase the line later on. Add a
			 * newline to separate the hint from subsequent output.
			 *
			 * Make sure that our message is separated with a whitespace
			 * from further cruft that may be written by the editor.
			 */
			const char term = is_terminal_dumb() ? '\n' : ' ';

			fprintf(stderr,
				_("hint: Waiting for your editor to close the file...%c"),
				term);
			fflush(stderr);
		}

		strbuf_realpath(&realpath, path, 1);

		strvec_pushl(&p.args, editor, realpath.buf, NULL);
		if (env)
			strvec_pushv(&p.env, (const char **)env);
		p.use_shell = 1;
		p.trace2_child_class = "editor";
		if (start_command(&p) < 0) {
			strbuf_release(&realpath);
			return error("unable to start editor '%s'", editor);
		}

		sigchain_push(SIGINT, SIG_IGN);
		sigchain_push(SIGQUIT, SIG_IGN);
		ret = finish_command(&p);
		strbuf_release(&realpath);
		sig = ret - 128;
		sigchain_pop(SIGINT);
		sigchain_pop(SIGQUIT);
		if (sig == SIGINT || sig == SIGQUIT)
			raise(sig);
		if (print_waiting_for_editor && !is_terminal_dumb())
			/*
			 * Erase the entire line to avoid wasting the
			 * vertical space.
			 */
			term_clear_line();
		if (ret)
			return error("there was a problem with the editor '%s'",
					editor);