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Add a clear-on-attach option which when turned off scrolls away the

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existing terminal state instead of entering the alternate screen. This
is useful in environments where tmux is started as a login shell but it
is important that any pre-tmux messages are still visible. GitHub issue
5508 from Josef Řídký.
This commit is contained in:
nicm
2026-08-25 08:37:08 +00:00
committed by tmux update bot
parent 6f4c9b32af
commit 4157b64754
5 changed files with 48 additions and 11 deletions
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28
tty.c
View File

@@ -1,4 +1,4 @@
/* $OpenBSD: tty.c,v 1.479 2026/08/18 09:01:20 nicm Exp $ */
/* $OpenBSD: tty.c,v 1.480 2026/08/25 08:37:08 nicm Exp $ */
/*
* Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -333,6 +333,7 @@ tty_start_tty(struct tty *tty)
{
struct client *c = tty->client;
struct termios tio;
u_int i;
setblocking(c->fd, 0);
event_add(&tty->event_in, NULL);
@@ -348,10 +349,21 @@ tty_start_tty(struct tty *tty)
if (tcsetattr(c->fd, TCSANOW, &tio) == 0)
tcflush(c->fd, TCOFLUSH);
tty_putcode(tty, TTYC_SMCUP);
if (options_get_number(global_options, "clear-on-attach")) {
tty_putcode(tty, TTYC_SMCUP);
tty_putcode(tty, TTYC_CLEAR);
} else {
tty_putcode_ii(tty, TTYC_CSR, 0, tty->sy - 1);
tty_putcode_ii(tty, TTYC_CUP, 0, tty->sy - 1);
if (tty_term_has(tty->term, TTYC_INDN))
tty_putcode_i(tty, TTYC_INDN, tty->sy + 1);
else if (tty_term_has(tty->term, TTYC_IND)) {
for (i = 0; i < tty->sy + 1; i++)
tty_putcode(tty, TTYC_IND);
} else
tty_putcode(tty, TTYC_CLEAR);
}
tty_putcode(tty, TTYC_SMKX);
tty_putcode(tty, TTYC_CLEAR);
if (tty_acs_needed(tty)) {
log_debug("%s: using capabilities for ACS", c->name);
@@ -467,7 +479,8 @@ tty_stop_tty(struct tty *tty)
tty_raw(tty, tty_term_string(tty->term, TTYC_RMACS));
tty_raw(tty, tty_term_string(tty->term, TTYC_SGR0));
tty_raw(tty, tty_term_string(tty->term, TTYC_RMKX));
tty_raw(tty, tty_term_string(tty->term, TTYC_CLEAR));
if (options_get_number(global_options, "clear-on-attach"))
tty_raw(tty, tty_term_string(tty->term, TTYC_CLEAR));
if (tty->cstyle != SCREEN_CURSOR_DEFAULT) {
if (tty_term_has(tty->term, TTYC_SE))
tty_raw(tty, tty_term_string(tty->term, TTYC_SE));
@@ -492,7 +505,10 @@ tty_stop_tty(struct tty *tty)
if (tty_use_margin(tty))
tty_raw(tty, tty_term_string(tty->term, TTYC_DSMG));
tty_raw(tty, tty_term_string(tty->term, TTYC_RMCUP));
if (options_get_number(global_options, "clear-on-attach"))
tty_raw(tty, tty_term_string(tty->term, TTYC_RMCUP));
else
tty_raw(tty, tty_term_string(tty->term, TTYC_CLEAR));
if (tty->term->flags & TERM_VT100LIKE)
tty_raw(tty, "\033[?2031l");