From: Andre Noll <maan@tuebingen.mpg.de>
Date: Wed, 5 May 2021 16:48:13 +0000 (+0200)
Subject: enter: Save and restore the terminal settings.
X-Git-Url: http://git.tuebingen.mpg.de/releases/paraslash-0.2.17.tar.bz2.asc?a=commitdiff_plain;h=b38165e385fd9f1bb66d020d48cb2d09348ba657;p=micoforia.git

enter: Save and restore the terminal settings.

On some systems, the backspace key no longer worked the
enter subcommand exited.
---

diff --git a/micoforia.c b/micoforia.c
index 6e10a0c..b09f352 100644
--- a/micoforia.c
+++ b/micoforia.c
@@ -1929,6 +1929,8 @@ static bool com_enter(void)
 	bool success;
 	int ret, pid;
 	char *errctx;
+	struct termios tios;
+	bool tty;
 
 	ret = lls_check_arg_count(sublpr, 1, INT_MAX, &errctx);
 	if (ret < 0)
@@ -1951,7 +1953,21 @@ static bool com_enter(void)
 			: dflt_cmd[n];
 	argv[N - 1] = NULL;
 	clean_env();
+	tty = false;
+	if (isatty(STDIN_FILENO) && isatty(STDOUT_FILENO)) {
+		if (tcgetattr(STDIN_FILENO, &tios) >= 0)
+			tty = true;
+	}
 	success = xexec(argv, NULL);
+	if (tty) { /* reset terminal settings */
+		/*
+		 * First give up the controlling terminal. Without this, the
+		 * command gets SIGSTOP and goes to the background. We ignore
+		 * errors here because nobody cares about a messed up terminal.
+		 */
+		ioctl(STDIN_FILENO, TIOCNOTTY);
+		tcsetattr(STDIN_FILENO, TCSAFLUSH, &tios);
+	}
 	free(argv);
 	return success;
 }