===================================================================
RCS file: /cvsrepo/anoncvs/cvs/src/usr.bin/tmux/tmux.1,v
retrieving revision 1.942
retrieving revision 1.943
diff -u -r1.942 -r1.943
--- src/usr.bin/tmux/tmux.1	2024/05/14 07:40:39	1.942
+++ src/usr.bin/tmux/tmux.1	2024/05/14 07:52:19	1.943
@@ -1,4 +1,4 @@
-.\" $OpenBSD: tmux.1,v 1.942 2024/05/14 07:40:39 nicm Exp $
+.\" $OpenBSD: tmux.1,v 1.943 2024/05/14 07:52:19 nicm Exp $
 .\"
 .\" Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
 .\"
@@ -4889,6 +4889,14 @@
 set-hook -g after-split-window "selectl even-vertical"
 .Ed
 .Pp
+If a command fails, the
+.Ql command-error
+hook will be fired.
+For example, this could be used to write to a log file:
+.Bd -literal -offset indent
+set-hook -g command-error "run-shell \\"echo 'a tmux command failed' >>/tmp/log\\""
+.Ed
+.Pp
 All the notifications listed in the
 .Sx CONTROL MODE
 section are hooks (without any arguments), except
@@ -4921,6 +4929,8 @@
 Run when a client is resized.
 .It client-session-changed
 Run when a client's attached session is changed.
+.It command-error
+Run when a command fails.
 .It pane-died
 Run when the program running in a pane exits, but
 .Ic remain-on-exit