Mercurial > vim
changeset 34776:19e038a1139a v9.1.0264
patch 9.1.0264: libgpm may delete some signal handlers
Commit: https://github.com/vim/vim/commit/cc59d62215b075c715294ad24a41bfd091cb8d48
Author: Julio B <julio.bacel@gmail.com>
Date: Thu Apr 4 21:55:10 2024 +0200
patch 9.1.0264: libgpm may delete some signal handlers
Problem: libgpm may delete some signal handlers
Solution: restore these signal handlers after calling gpm
(Julio B)
When 'mouse' is set, vim is trying to detect mouse support on startup.
Eventually, vim resorts to using libgpm as the final method of
mouse detection. This library may delete some signals handlers that were
initially set up by vim.
This is how:
- mch_setmouse() calls gpm_open()
- Gpm_Open is executed, which returns early on line 210 [1]
- Keep in mind that lines 353-373 [2] are skipped, so
gpm_saved_suspend_hook and gpm_saved_winch_hook are empty
- Finally, Gpm_Close is called, which will reset [3] SIGWINCH and
SIGTSTP to an empty sigaction.
[1] https://github.com/telmich/gpm/blob/e82d1a653ca94aa4ed12441424da6ce780b1e530/src/lib/liblow.c#L210
[2] https://github.com/telmich/gpm/blob/e82d1a653ca94aa4ed12441424da6ce780b1e530/src/lib/liblow.c#L353-L373
[3] https://github.com/telmich/gpm/blob/e82d1a653ca94aa4ed12441424da6ce780b1e530/src/lib/liblow.c#L419-L424
fixes: #12154
closes: #14401
Signed-off-by: Julio B <julio.bacel@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
| author | Christian Brabandt <cb@256bit.org> |
|---|---|
| date | Thu, 04 Apr 2024 22:00:06 +0200 |
| parents | e0059b2d4e2b |
| children | 7ad9d92905ac |
| files | src/os_unix.c src/version.c |
| diffstat | 2 files changed, 14 insertions(+), 0 deletions(-) [+] |
line wrap: on
line diff
--- a/src/os_unix.c +++ b/src/os_unix.c @@ -7494,7 +7494,19 @@ gpm_open(void) return 1; // succeed } if (gpm_fd == -2) + { Gpm_Close(); // We don't want to talk to xterm via gpm + + // Gpm_Close fails to properly restore the WINCH and TSTP handlers, + // leading to Vim ignoring resize signals. We have to re-initialize + // these handlers again here. +# ifdef SIGWINCH + mch_signal(SIGWINCH, sig_winch); +# endif +# ifdef SIGTSTP + mch_signal(SIGTSTP, restricted ? SIG_IGN : sig_tstp); +# endif + } return 0; }