Add formats and events for OSC 133 commmands, as well as a -T flag to

set-hook -B to only fire when the format is true.

cmd-set-option.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: cmd-set-option.c,v 1.145 2026/07/10 13:38:45 nicm Exp $ */
+/* $OpenBSD: cmd-set-option.c,v 1.146 2026/07/10 15:20:06 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -66,8 +66,8 @@ const struct cmd_entry cmd_set_hook_entry = {
 	.name = "set-hook",
 	.alias = NULL,
 
-	.args = { "agpERt:uB:w", 0, 2, cmd_set_option_args_parse },
+	.args = { "agpERTt:uB:w", 0, 2, cmd_set_option_args_parse },
-	.usage = "[-agpERuw] [-B name:what:format] " CMD_TARGET_PANE_USAGE " "
+	.usage = "[-agpERTuw] [-B name:what:format] " CMD_TARGET_PANE_USAGE " "
 		 "[hook] [command]",
 
 	.target = { 't', CMD_FIND_PANE, CMD_FIND_CANFAIL },
@@ -143,7 +143,7 @@ cmd_set_hook_monitor_exec(struct cmdq_item *item, struct args *args, int window)
 	char			*expanded = NULL, *newvalue = NULL;
 	const char		*value, *old;
 	enum monitor_type	 type;
-	int			 id, scope;
+	int			 id, scope, flags = 0;
 
 	if (args_count(args) > 1) {
 		cmdq_error(item, "too many arguments");
@@ -204,7 +204,9 @@ cmd_set_hook_monitor_exec(struct cmdq_item *item, struct args *args, int window)
 	    oo != global_s_options &&
 	    oo != global_w_options)
 		s = target->s;
-	hooks_monitor_add(item, oo, name, type, id, format, &fs, s);
+	if (args_has(args, 'T'))
+		flags |= MONITOR_NOTIFY_TRUE;
+	hooks_monitor_add(item, oo, name, type, id, format, flags, &fs, s);
 
 out:
 	free(newvalue);

format.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: format.c,v 1.402 2026/07/09 06:33:19 nicm Exp $ */
+/* $OpenBSD: format.c,v 1.403 2026/07/10 15:20:06 nicm Exp $ */
 
 /*
  * Copyright (c) 2011 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -2173,6 +2173,106 @@ format_cb_pane_dead_time(struct format_tree *ft)
 	return (NULL);
 }
 
+/* Callback for pane_last_output_time. */
+static void *
+format_cb_pane_last_output_time(struct format_tree *ft)
+{
+	struct window_pane	*wp = ft->wp;
+	static struct timeval	 tv;
+
+	if (wp != NULL && wp->last_output_time != 0) {
+		tv.tv_sec = wp->last_output_time;
+		tv.tv_usec = 0;
+		return (&tv);
+	}
+	return (NULL);
+}
+
+/* Callback for pane_last_prompt_time. */
+static void *
+format_cb_pane_last_prompt_time(struct format_tree *ft)
+{
+	struct window_pane	*wp = ft->wp;
+	static struct timeval	 tv;
+
+	if (wp != NULL && wp->last_prompt_time != 0) {
+		tv.tv_sec = wp->last_prompt_time;
+		tv.tv_usec = 0;
+		return (&tv);
+	}
+	return (NULL);
+}
+
+/* Callback for pane_command_start_time. */
+static void *
+format_cb_pane_command_start_time(struct format_tree *ft)
+{
+	struct window_pane	*wp = ft->wp;
+	static struct timeval	 tv;
+
+	if (wp != NULL && wp->cmd_start_time != 0) {
+		tv.tv_sec = wp->cmd_start_time;
+		tv.tv_usec = 0;
+		return (&tv);
+	}
+	return (NULL);
+}
+
+/* Callback for pane_command_end_time. */
+static void *
+format_cb_pane_command_end_time(struct format_tree *ft)
+{
+	struct window_pane	*wp = ft->wp;
+	static struct timeval	 tv;
+
+	if (wp != NULL && wp->cmd_end_time != 0) {
+		tv.tv_sec = wp->cmd_end_time;
+		tv.tv_usec = 0;
+		return (&tv);
+	}
+	return (NULL);
+}
+
+/* Callback for pane_command_running. */
+static void *
+format_cb_pane_command_running(struct format_tree *ft)
+{
+	struct window_pane	*wp = ft->wp;
+
+	if (wp != NULL)
+		return (format_printf("%d", !!(wp->flags & PANE_CMDRUNNING)));
+	return (NULL);
+}
+
+/* Callback for pane_command_duration. */
+static void *
+format_cb_pane_command_duration(struct format_tree *ft)
+{
+	struct window_pane	*wp = ft->wp;
+	time_t			 end;
+
+	if (wp == NULL || wp->cmd_start_time == 0)
+		return (NULL);
+	if (wp->flags & PANE_CMDRUNNING)
+		end = time(NULL);
+	else
+		end = wp->cmd_end_time;
+	if (end < wp->cmd_start_time)
+		end = wp->cmd_start_time;
+	return (format_printf("%lld", (long long)(end - wp->cmd_start_time)));
+}
+
+/* Callback for pane_command_status. */
+static void *
+format_cb_pane_command_status(struct format_tree *ft)
+{
+	struct window_pane	*wp = ft->wp;
+
+	if (wp != NULL && wp->cmd_status != -1)
+		return (format_printf("%d", wp->cmd_status));
+	return (NULL);
+}
+
 /* Callback for pane_format. */
 static void *
 format_cb_pane_format(struct format_tree *ft)
@@ -3485,6 +3585,21 @@ static const struct format_table_entry format_table[] = {
 	{ "pane_bottom", FORMAT_TABLE_STRING,
 	  format_cb_pane_bottom
 	},
+	{ "pane_command_duration", FORMAT_TABLE_STRING,
+	  format_cb_pane_command_duration
+	},
+	{ "pane_command_end_time", FORMAT_TABLE_TIME,
+	  format_cb_pane_command_end_time
+	},
+	{ "pane_command_running", FORMAT_TABLE_STRING,
+	  format_cb_pane_command_running
+	},
+	{ "pane_command_start_time", FORMAT_TABLE_TIME,
+	  format_cb_pane_command_start_time
+	},
+	{ "pane_command_status", FORMAT_TABLE_STRING,
+	  format_cb_pane_command_status
+	},
 	{ "pane_current_command", FORMAT_TABLE_STRING,
 	  format_cb_current_command
 	},
@@ -3536,6 +3651,12 @@ static const struct format_table_entry format_table[] = {
 	{ "pane_last", FORMAT_TABLE_STRING,
 	  format_cb_pane_last
 	},
+	{ "pane_last_output_time", FORMAT_TABLE_TIME,
+	  format_cb_pane_last_output_time
+	},
+	{ "pane_last_prompt_time", FORMAT_TABLE_TIME,
+	  format_cb_pane_last_prompt_time
+	},
 	{ "pane_left", FORMAT_TABLE_STRING,
 	  format_cb_pane_left
 	},

hooks.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: hooks.c,v 1.12 2026/07/10 13:38:45 nicm Exp $ */
+/* $OpenBSD: hooks.c,v 1.13 2026/07/10 15:20:06 nicm Exp $ */
 
 /*
  * Copyright (c) 2026 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -407,7 +407,7 @@ hooks_monitor_cb(struct monitor_change *change, void *data)
 void
 hooks_monitor_add(__unused struct cmdq_item *item, struct options *oo,
     const char *name, enum monitor_type type, int id, const char *format,
-    struct cmd_find_state *fs, struct session *s)
+    int flags, struct cmd_find_state *fs, struct session *s)
 {
 	struct options_entry	*o;
 	struct hook_monitor	*hm;
@@ -426,7 +426,7 @@ hooks_monitor_add(__unused struct cmdq_item *item, struct options *oo,
 	hm->set = monitor_create_session(s, hooks_monitor_cb, hm);
 	hm->sink = events_add_sink(name, hooks_monitor_hook_cb, hm);
 	options_set_monitor_data(o, hm);
-	monitor_add(hm->set, name, type, id, format, 0);
+	monitor_add(hm->set, name, type, id, format, flags);
 }
 
 /* Convert a hook monitor to its value. */

input.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: input.c,v 1.265 2026/07/10 13:38:45 nicm Exp $ */
+/* $OpenBSD: input.c,v 1.266 2026/07/10 15:20:06 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -1034,6 +1034,8 @@ input_parse_pane(struct window_pane *wp)
 	size_t	 new_size;
 
 	new_data = window_pane_get_new_data(wp, &wp->offset, &new_size);
+	if (new_size != 0)
+		wp->last_output_time = time(NULL);
 	input_parse_buffer(wp, new_data, new_size);
 	window_pane_update_used_data(wp, &wp->offset, new_size);
 }
@@ -3126,7 +3128,8 @@ input_osc_12(struct input_ctx *ictx, const char *p)
 			c = ictx->ctx.s->ccolour;
 			if (c == -1)
 				c = ictx->ctx.s->default_ccolour;
-			input_osc_colour_reply(ictx, 1, 12, 0, c, ictx->input_end);
+			input_osc_colour_reply(ictx, 1, 12, 0, c,
+			    ictx->input_end);
 		}
 		return;
 	}
@@ -3146,24 +3149,92 @@ input_osc_112(struct input_ctx *ictx, const char *p)
 		screen_set_cursor_colour(ictx->ctx.s, -1);
 }
 
+/* Fire an OSC 133 command event. */
+static void
+input_fire_command_event(struct window_pane *wp, const char *name)
+{
+	struct event_payload	*ep;
+	struct cmd_find_state	 fs;
+	time_t			 tstart = wp->cmd_start_time, end;
+	time_t			 tend = wp->cmd_end_time;
+
+	ep = event_payload_create();
+	cmd_find_from_pane(&fs, wp, 0);
+	event_payload_set_target(ep, &fs);
+	if (fs.s != NULL)
+		event_payload_set_session(ep, "session", fs.s);
+	if (fs.wl != NULL)
+		event_payload_set_int(ep, "window_index", fs.wl->idx);
+	event_payload_set_window(ep, "window", wp->window);
+	event_payload_set_pane(ep, "pane", wp);
+
+	if (wp->cmd_status != -1)
+		event_payload_set_int(ep, "command_status", wp->cmd_status);
+	if (tstart != 0)
+		event_payload_set_time(ep, "command_start_time", tstart);
+	if (tend != 0)
+		event_payload_set_time(ep, "command_end_time", tend);
+
+	if (tstart != 0) {
+		if (wp->flags & PANE_CMDRUNNING)
+			end = time(NULL);
+		else
+			end = tend;
+		if (end < tstart)
+			end = tstart;
+		end -= tstart;
+		event_payload_set_uint(ep, "command_duration", end);
+	}
+
+	events_fire(name, ep);
+}
+
 /* Handle the OSC 133 sequence. */
 static void
 input_osc_133(struct input_ctx *ictx, const char *p)
 {
+	struct window_pane	*wp = ictx->wp;
 	struct grid		*gd = ictx->ctx.s->grid;
 	u_int			 line = ictx->ctx.s->cy + gd->hsize;
-	struct grid_line	*gl;
+	struct grid_line	*gl = NULL;
+	const char		*errstr;
+	int			 status;
 
-	if (line > gd->hsize + gd->sy - 1)
+	if (line <= gd->hsize + gd->sy - 1)
-		return;
+		gl = grid_get_line(gd, line);
-	gl = grid_get_line(gd, line);
 
 	switch (*p) {
 	case 'A':
-		gl->flags |= GRID_LINE_START_PROMPT;
+		if (gl != NULL)
+			gl->flags |= GRID_LINE_START_PROMPT;
+		if (wp != NULL) {
+			wp->last_prompt_time = time(NULL);
+			events_fire_pane("pane-shell-prompt", wp);
+		}
 		break;
 	case 'C':
-		gl->flags |= GRID_LINE_START_OUTPUT;
+		if (gl != NULL)
+			gl->flags |= GRID_LINE_START_OUTPUT;
+		if (wp != NULL) {
+			wp->cmd_start_time = time(NULL);
+			wp->cmd_end_time = 0;
+			wp->flags |= PANE_CMDRUNNING;
+			wp->cmd_status = -1;
+			input_fire_command_event(wp, "pane-command-started");
+		}
+		break;
+	case 'D':
+		if (wp != NULL) {
+			wp->cmd_end_time = time(NULL);
+			wp->flags &= ~PANE_CMDRUNNING;
+			wp->cmd_status = -1;
+			if (p[1] == ';' && p[2] != '\0') {
+				status = strtonum(p + 2, 0, INT_MAX, &errstr);
+				if (errstr == NULL)
+					wp->cmd_status = status;
+			}
+			input_fire_command_event(wp, "pane-command-finished");
+		}
 		break;
 	}
 }

monitor.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: monitor.c,v 1.5 2026/07/10 13:38:45 nicm Exp $ */
+/* $OpenBSD: monitor.c,v 1.6 2026/07/10 15:20:06 nicm Exp $ */
 
 /*
  * Copyright (c) 2026 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -53,7 +53,7 @@ struct monitor_item {
 
 	enum monitor_type		 type;
 	u_int				 id;
-	u_int				 flags;
+	int				 flags;
 
 	char				*last;
 	struct monitor_panes		 panes;
@@ -198,7 +198,9 @@ monitor_check_value(struct monitor_set *ms, struct monitor_item *me,
 {
 	if (*last == NULL) {
 		*last = value;
-		if (me->flags & MONITOR_NOTIFY_INITIAL)
+		if ((me->flags & MONITOR_NOTIFY_INITIAL) &&
+		    ((~me->flags & MONITOR_NOTIFY_TRUE) ||
+		    format_true(value)))
 			monitor_report(ms, me, s, wl, wp, value, NULL);
 		return;
 	}
@@ -208,7 +210,8 @@ monitor_check_value(struct monitor_set *ms, struct monitor_item *me,
 		return;
 	}
 
-	monitor_report(ms, me, s, wl, wp, value, *last);
+	if ((~me->flags & MONITOR_NOTIFY_TRUE) || format_true(value))
+		monitor_report(ms, me, s, wl, wp, value, *last);
 	free(*last);
 	*last = value;
 }
@@ -621,7 +624,7 @@ fail:
 /* Add a subscription. */
 void
 monitor_add(struct monitor_set *ms, const char *name, enum monitor_type type,
-    int id, const char *format, u_int flags)
+    int id, const char *format, int flags)
 {
 	struct monitor_item	*me, find = { .name = (char *)name };
 	struct timeval		 tv = { .tv_sec = 1 };

options-table.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: options-table.c,v 1.232 2026/07/10 13:38:45 nicm Exp $ */
+/* $OpenBSD: options-table.c,v 1.233 2026/07/10 15:20:06 nicm Exp $ */
 
 /*
  * Copyright (c) 2011 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -1934,6 +1934,8 @@ const struct options_table_entry options_table[] = {
 	OPTIONS_TABLE_HOOK("client-dark-theme", ""),
 	OPTIONS_TABLE_HOOK("command-error", ""),
 	OPTIONS_TABLE_HOOK("marked-pane-changed", ""),
+	OPTIONS_TABLE_PANE_HOOK("pane-command-finished", ""),
+	OPTIONS_TABLE_PANE_HOOK("pane-command-started", ""),
 	OPTIONS_TABLE_PANE_HOOK("pane-created", ""),
 	OPTIONS_TABLE_PANE_HOOK("pane-died", ""),
 	OPTIONS_TABLE_PANE_HOOK("pane-exited", ""),
@@ -1946,6 +1948,7 @@ const struct options_table_entry options_table[] = {
 	OPTIONS_TABLE_PANE_HOOK("pane-prompt-opened", ""),
 	OPTIONS_TABLE_PANE_HOOK("pane-resized", ""),
 	OPTIONS_TABLE_PANE_HOOK("pane-set-clipboard", ""),
+	OPTIONS_TABLE_PANE_HOOK("pane-shell-prompt", ""),
 	OPTIONS_TABLE_PANE_HOOK("pane-title-changed", ""),
 	OPTIONS_TABLE_HOOK("session-closed", ""),
 	OPTIONS_TABLE_HOOK("session-created", ""),

tmux.1

@@ -1,4 +1,4 @@
-.\" $OpenBSD: tmux.1,v 1.1131 2026/07/10 13:38:45 nicm Exp $
+.\" $OpenBSD: tmux.1,v 1.1132 2026/07/10 15:20:06 nicm Exp $
 .\"
 .\" Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
 .\"
@@ -6359,6 +6359,17 @@ Run when a client switches to a dark theme.
 Run when a command fails.
 .It marked\-pane\-changed
 Run when the marked pane is set or cleared.
+.It pane\-command\-finished
+Run when an OSC 133 command finishes in a pane.
+The event payload includes
+.Ql hook_command_start_time ,
+.Ql hook_command_end_time ,
+.Ql hook_command_duration
+and
+.Ql hook_command_status
+if present.
+.It pane\-command\-started
+Run when an OSC 133 command starts in a pane.
 .It pane\-created
 Run when a pane is created or respawned.
 .It pane\-died
@@ -6391,6 +6402,8 @@ Run when a pane is resized.
 Run when the terminal clipboard is set using the
 .Xr xterm 1
 escape sequence.
+.It pane\-shell\-prompt
+Run when an OSC 133 shell prompt starts in a pane.
 .It pane\-title\-changed
 Run when a pane title is changed.
 .It session\-closed
@@ -6425,7 +6438,7 @@ Run when a window is unlinked from a session.
 Hooks are managed with these commands:
 .Bl -tag -width Ds
 .It Xo Ic set\-hook
-.Op Fl agpERuw
+.Op Fl agpERTuw
 .Op Fl B Ar name:what:format
 .Op Fl t Ar target\-pane
 .Ar hook\-name
@@ -6456,6 +6469,11 @@ is the hook to run,
 selects the session, pane, all panes, window, or all windows, and
 .Ar format
 is expanded once a second.
+With
+.Fl T ,
+the hook is run only when
+.Ar format
+is true.
 For monitor hooks,
 .Ar name
 must begin with
@@ -7191,6 +7209,11 @@ The following variables are available, where appropriate:
 .It Li "pane_at_top" Ta "" Ta "1 if pane is at the top of window"
 .It Li "pane_bg" Ta "" Ta "Pane background colour"
 .It Li "pane_bottom" Ta "" Ta "Bottom of pane"
+.It Li "pane_command_duration" Ta "" Ta "Current or most recent OSC 133 command duration in seconds"
+.It Li "pane_command_end_time" Ta "" Ta "Time most recent OSC 133 command ended"
+.It Li "pane_command_running" Ta "" Ta "1 if an OSC 133 command is running"
+.It Li "pane_command_start_time" Ta "" Ta "Time current or most recent OSC 133 command started"
+.It Li "pane_command_status" Ta "" Ta "Exit status from most recent OSC 133 command"
 .It Li "pane_current_command" Ta "" Ta "Current command if available"
 .It Li "pane_current_path" Ta "" Ta "Current path if available"
 .It Li "pane_dead" Ta "" Ta "1 if pane is dead"
@@ -7208,6 +7231,8 @@ The following variables are available, where appropriate:
 .It Li "pane_input_off" Ta "" Ta "1 if input to pane is disabled"
 .It Li "pane_key_mode" Ta "" Ta "Extended key reporting mode in this pane"
 .It Li "pane_last" Ta "" Ta "1 if last pane"
+.It Li "pane_last_output_time" Ta "" Ta "Time pane last produced output"
+.It Li "pane_last_prompt_time" Ta "" Ta "Time most recent OSC 133 prompt began"
 .It Li "pane_left" Ta "" Ta "Left of pane"
 .It Li "pane_marked" Ta "" Ta "1 if this is the marked pane"
 .It Li "pane_marked_set" Ta "" Ta "1 if a marked pane is set"

tmux.h

@@ -1,4 +1,4 @@
-/* $OpenBSD: tmux.h,v 1.1394 2026/07/10 13:38:45 nicm Exp $ */
+/* $OpenBSD: tmux.h,v 1.1395 2026/07/10 15:20:06 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -1267,6 +1267,7 @@ struct window_pane {
 #define PANE_UNSEENCHANGES 0x4000
 #define PANE_REDRAWSCROLLBAR 0x8000
 #define PANE_DESTROYED 0x10000
+#define PANE_CMDRUNNING 0x20000
 
 	bitstr_t	*sync_dirty;
 	u_int		 sync_dirty_size;
@@ -1289,6 +1290,12 @@ struct window_pane {
 	struct cmdq_item *wait_item;	/* new-pane -W: waiting for pane exit */
 	struct spawn_editor_state *editor;
 
+	time_t		 last_output_time;
+	time_t		 last_prompt_time;
+	time_t		 cmd_start_time;
+	time_t		 cmd_end_time;
+	int		 cmd_status;
+
 	int		 fd;
 	struct bufferevent *event;
 
@@ -2293,6 +2300,7 @@ enum monitor_type {
 	MONITOR_ALL_WINDOWS
 };
 #define MONITOR_NOTIFY_INITIAL 0x1
+#define MONITOR_NOTIFY_TRUE 0x2
 struct monitor_change {
 	const char		*name;
 	const char		*value;
@@ -2699,7 +2707,7 @@ void	 hooks_build_events(void);
 void	 hooks_run(struct cmdq_item *, const char *);
 void	 hooks_monitor_add(struct cmdq_item *, struct options *,
 	    const char *, enum monitor_type, int, const char *,
-	    struct cmd_find_state *, struct session *);
+	    int, struct cmd_find_state *, struct session *);
 void	 hooks_monitor_remove(struct options *, const char *);
 void	 hooks_monitor_free(void *);
 char	*hooks_monitor_to_string(struct options_entry *);
@@ -3901,7 +3909,7 @@ void	monitor_destroy(struct monitor_set *);
 int	monitor_parse(const char *, char **, enum monitor_type *, int *,
 	    char **);
 void	monitor_add(struct monitor_set *, const char *, enum monitor_type, int,
-	    const char *, u_int);
+	    const char *, int);
 void	monitor_remove(struct monitor_set *, const char *);
 
 /* control.c */

window.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: window.c,v 1.359 2026/07/10 13:38:45 nicm Exp $ */
+/* $OpenBSD: window.c,v 1.360 2026/07/10 15:20:06 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -1177,6 +1177,7 @@ window_pane_create(struct window *w, u_int sx, u_int sy, u_int hlimit)
 	wp->window = w;
 	wp->options = options_create(w->options);
 	wp->flags = PANE_STYLECHANGED;
+	wp->cmd_status = -1;
 
 	wp->id = next_window_pane_id++;
 	RB_INSERT(window_pane_tree, &all_window_panes, wp);