Mercurial > vim
diff src/ex_getln.c @ 34196:57b21d421cb2 v9.1.0048
patch 9.1.0048: Abort opening cmdwin if autocmds screw things up
Commit: https://github.com/vim/vim/commit/43b395ec2e7d24a067d7cb00109818b64da144a5
Author: Sean Dewar <seandewar@users.noreply.github.com>
Date: Wed Aug 16 16:17:31 2023 +0100
patch 9.1.0048: Abort opening cmdwin if autocmds screw things up
Problem: Autocmds triggered from opening the cmdwin (in win_split and
do_ecmd) can cause issues such as E199, as the current checks
are insufficient.
Solution: Commands executed from the cmdwin apply to the old curwin/buf,
so they should be kept in a "suspended" state; abort if
they've changed. Also abort if cmdwin/buf was tampered with,
and check that curwin is correct. Try to clean up the cmdwin
buffer (only if hidden and non-current to simplify things; the
same approach is used when closing cmdwin normally), and add a
beep. (Sean Dewar)
It'd be nice to also check that curwin was *really* created by win_split, as
autocommands can change curwin before it returns (so it can't be assumed to be
that of the split); for now, this means that the cmdwin may not be the botwin in
that case, which is probably OK.
closes: #12819
Signed-off-by: Sean Dewar <seandewar@users.noreply.github.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
| author | Christian Brabandt <cb@256bit.org> |
|---|---|
| date | Tue, 23 Jan 2024 23:00:05 +0100 |
| parents | a522c6c0127b |
| children | 08e6a44e5c77 |
line wrap: on
line diff
--- a/src/ex_getln.c +++ b/src/ex_getln.c @@ -4458,6 +4458,8 @@ open_cmdwin(void) #ifdef FEAT_FOLDING int save_KeyTyped; #endif + int newbuf_status; + int cmdwin_valid; // Can't do this when text or buffer is locked. // Can't do this recursively. Can't do it when typing a password. @@ -4491,6 +4493,16 @@ open_cmdwin(void) ga_clear(&winsizes); return K_IGNORE; } + // win_split() autocommands may have messed with the old window or buffer. + // Treat it as abandoning this command-line. + if (!win_valid(old_curwin) || curwin == old_curwin + || !bufref_valid(&old_curbuf) + || old_curwin->w_buffer != old_curbuf.br_buf) + { + beep_flush(); + ga_clear(&winsizes); + return Ctrl_C; + } // Don't let quitting the More prompt make this fail. got_int = FALSE; @@ -4498,14 +4510,29 @@ open_cmdwin(void) cmdwin_type = get_cmdline_type(); cmdwin_win = curwin; - // Create the command-line buffer empty. - if (do_ecmd(0, NULL, NULL, NULL, ECMD_ONE, ECMD_HIDE, NULL) == FAIL) + // Create empty command-line buffer. Be especially cautious of BufLeave + // autocommands from do_ecmd(), as cmdwin restrictions do not apply to them! + newbuf_status = do_ecmd(0, NULL, NULL, NULL, ECMD_ONE, ECMD_HIDE, + NULL); + cmdwin_valid = win_valid(cmdwin_win); + if (newbuf_status == FAIL || !cmdwin_valid || curwin != cmdwin_win || + !win_valid(old_curwin) || !bufref_valid(&old_curbuf) || + old_curwin->w_buffer != old_curbuf.br_buf) { - // Some autocommand messed it up? - win_close(curwin, TRUE); - ga_clear(&winsizes); + if (newbuf_status == OK) + set_bufref(&bufref, curbuf); + if (cmdwin_valid && !last_window()) + win_close(cmdwin_win, TRUE); + + // win_close() autocommands may have already deleted the buffer. + if (newbuf_status == OK && bufref_valid(&bufref) && + bufref.br_buf != curbuf) + close_buffer(NULL, bufref.br_buf, DOBUF_WIPE, FALSE, FALSE); + cmdwin_type = 0; cmdwin_win = NULL; + beep_flush(); + ga_clear(&winsizes); return Ctrl_C; } cmdwin_buf = curbuf; @@ -4622,12 +4649,13 @@ open_cmdwin(void) cmdwin_win = NULL; exmode_active = save_exmode; - // Safety check: The old window or buffer was deleted: It's a bug when - // this happens! - if (!win_valid(old_curwin) || !bufref_valid(&old_curbuf)) + // Safety check: The old window or buffer was changed or deleted: It's a bug + // when this happens! + if (!win_valid(old_curwin) || !bufref_valid(&old_curbuf) + || old_curwin->w_buffer != old_curbuf.br_buf) { cmdwin_result = Ctrl_C; - emsg(_(e_active_window_or_buffer_deleted)); + emsg(_(e_active_window_or_buffer_changed_or_deleted)); } else {