Oh, I apologize for not providing you with enough explanation. I just noticed that this is configuration-specific issue. In order to reproduce this problem, we should enable visual bell.
> set-option -g visual-bell on If we type this command on shell environment, ECHO-backed OSC sequences such as '\033]12;rgb:xx/xx/xx\033\\' will be emitted infinitely, > printf '\033]12;?\033\\' I found this problem on OSX 10.7 / Xterm patch level 288, at present. The another person seems to reproduce it on Ubuntu 12.10. I guess the process of this problem is as follows; 1. Tmux accepts '\033]12;?\033\\' as OSC sequence and misunderstand "?" as a "cursor color". So Tmux comes to emit '\033]12;?\033\\' every time the cursor is updated. However, according to Xterm's specification, this sequence does not mean "set cursor color", but "query cursor color". ref.http://invisible-island.net/xterm/ctlseqs/ctlseqs.html 2. Xterm replies current cursor color, such as '\033]12;rgb:xx/xx/xx\033\\', against this query. 3. bash / tcsh / zsh / ksh accepts it as key input, and it is echoed back to stout. Then the shell treats "\033]" or "\033\\" as invalid key sequences. typically they will emit BEL(^G). 4. Tmux accept BEL and does visual-bell action. status line is updated and cursor is updated again. They establishes the following circuit. it looks like an infinite echo loop. 1.cursor update -> 2.xterm's response -> 3.shell emits BEL -> 4.visual bell -> 1.cursor update -> ... On 2013/01/16, at 17:31, Nicholas Marriott wrote: > I don't understand what the problem is or how this fixes it. Where is ST > in your change? > > > On Wed, Jan 16, 2013 at 04:54:06PM +0900, Hayaki Saito wrote: >>> Is the ? in this diff supposed to be \\234? >> >> No, It's just a hot fix, for infinite echo problem. >> >> On 2013/01/15, at 13:26, Nicholas Marriott wrote: >> >>> Hi >>> >>> Why only check the first character of the string? >>> >>> Is the ? in this diff supposed to be \\234? >>> >>> >>> >>> >>> On Tue, Jan 01, 2013 at 11:51:24AM +0900, Hayaki Saito wrote: >>>> >>>> This is a hotfix patch for infinite echo loop issue which occurs with >>>> following shell command. >>>> >>>>> $ echo -en '\033]12;?\033\\' >>>> >>>> This problem occurs in some terminals that support OSC 12/get access >>>> feature (e.g. xterm). >>>> >>>> I think OSC 12 sequense should be completely parsed and validated. >>>> Some terminals like PuTTY accept 8bit ST (0x9c) control and treat it as >>>> OSC terminate character. >>>> So if cursor color string sequence includes 9c, it might cause unexpected >>>> behavior. >>>> >>>> --- >>>> input.c | 3 ++- >>>> 1 file changed, 2 insertions(+), 1 deletion(-) >>>> >>>> diff --git a/input.c b/input.c >>>> index 23b9574..9855324 100644 >>>> --- a/input.c >>>> +++ b/input.c >>>> @@ -1560,7 +1560,8 @@ input_exit_osc(struct input_ctx *ictx) >>>> server_status_window(ictx->wp->window); >>>> break; >>>> case 12: >>>> - screen_set_cursor_colour(ictx->ctx.s, p); >>>> + if (*p != '?') >>>> + screen_set_cursor_colour(ictx->ctx.s, p); >>>> break; >>>> case 112: >>>> if (*p == '\0') /* No arguments allowed. */ >>>> -- >>>> 1.7.11.5 >>>> >>>> >>>> >>>> ------------------------------------------------------------------------------ >>>> Master SQL Server Development, Administration, T-SQL, SSAS, SSIS, SSRS >>>> and more. Get SQL Server skills now (including 2012) with LearnDevNow - >>>> 200+ hours of step-by-step video tutorials by Microsoft MVPs and experts. >>>> SALE $99.99 this month only - learn more at: >>>> http://p.sf.net/sfu/learnmore_122512 >>>> _______________________________________________ >>>> tmux-users mailing list >>>> tmux-users@lists.sourceforge.net >>>> https://lists.sourceforge.net/lists/listinfo/tmux-users >> ------------------------------------------------------------------------------ Master Java SE, Java EE, Eclipse, Spring, Hibernate, JavaScript, jQuery and much more. Keep your Java skills current with LearnJavaNow - 200+ hours of step-by-step video tutorials by Java experts. SALE $49.99 this month only -- learn more at: http://p.sf.net/sfu/learnmore_122612 _______________________________________________ tmux-users mailing list tmux-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/tmux-users
