From: Michael Tremer <michael.tremer@ipfire.org>
Date: Sat, 19 Oct 2024 10:18:44 +0000 (+0000)
Subject: pty: Configure like SSH does it
X-Git-Tag: 0.9.30~992
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=9490a3bf4cd9560833eb92d67ab6a9f3d0f1ca1f;p=pakfire.git

pty: Configure like SSH does it

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>
---

diff --git a/src/libpakfire/pty.c b/src/libpakfire/pty.c
index ff83cf052..11d03a3bc 100644
--- a/src/libpakfire/pty.c
+++ b/src/libpakfire/pty.c
@@ -648,6 +648,82 @@ static int pakfire_pty_stdout(sd_event_source* source, int fd, uint32_t events,
 	return pakfire_pty_activity(pty, &pty->stdout, events);
 }
 
+static void pakfire_pty_make_raw(struct termios* termios) {
+	// Set input flags
+	termios->c_iflag |= (
+		// Ignore framing errors and parity errors
+		IGNPAR
+	);
+
+	// Clear input flags
+	termios->c_iflag &= ~(
+		// Strip off eighth bit
+		ISTRIP |
+
+		// Translate NL to CR on input
+		INLCR |
+
+		// Ignore carriage return on input
+		IGNCR |
+
+		// Translate carriage return to newline on input (unless IGNCR is set)
+		ICRNL |
+
+		// Enable XON/XOFF flow control on output
+		IXON |
+
+		// Typing any character will restart stopped output
+		IXANY |
+
+		// Enable XON/XOFF flow control on input
+		IXOFF |
+
+		// Map uppercase characters to lowercase on input
+		IUCLC
+	);
+
+	// Clear local flags
+	termios->c_lflag &= ~(
+		//  Send the SIGTTOU signal to the process group of a background process
+		// which tries to write to its controlling terminal
+		TOSTOP |
+
+		// When any of the characters INTR, QUIT, SUSP, or DSUSP are received,
+		// generate the corresponding signal
+		ISIG |
+
+		// Enable canonical mode
+		ICANON |
+
+		// Echo input characters
+		ECHO |
+
+		// If ICANON is also set, the ERASE character erases the preceding input character,
+		// and WERASE erases the preceding word.
+		ECHOE |
+
+		// If ICANON is also set, the KILL character erases the current line
+		ECHOK |
+
+		// If ICANON is also set, echo the NL character even if ECHO is not set.
+		ECHONL |
+
+		// Enable implementation-defined input processing. This flag, as well as ICANON
+		// must be enabled for the special characters EOL2, LNEXT, REPRINT, WERASE to be
+		// interpreted, and for the IUCLC flag to be effective.
+		IEXTEN
+	);
+
+	// Set output flags
+	termios->c_oflag |= (
+		// Map NL to CR-NL on output
+		ONLCR |
+
+		// Enable implementation-defined output processing
+		OPOST
+	);
+}
+
 static int pakfire_pty_enable_raw_mode(struct pakfire_pty* pty) {
 	struct termios raw_attrs;
 	int same;
@@ -672,7 +748,7 @@ static int pakfire_pty_enable_raw_mode(struct pakfire_pty* pty) {
 		raw_attrs = pty->stdin.attrs;
 
 		// Enable raw mode
-		cfmakeraw(&raw_attrs);
+		pakfire_pty_make_raw(&raw_attrs);
 
 		if (!same)
 			raw_attrs.c_oflag = pty->stdin.attrs.c_oflag;
@@ -696,7 +772,7 @@ static int pakfire_pty_enable_raw_mode(struct pakfire_pty* pty) {
 		raw_attrs = pty->stdout.attrs;
 
 		// Enable raw mode
-		cfmakeraw(&raw_attrs);
+		pakfire_pty_make_raw(&raw_attrs);
 
 		raw_attrs.c_iflag = pty->stdout.attrs.c_iflag;
 		raw_attrs.c_lflag = pty->stdout.attrs.c_lflag;