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From: Corinna Vinschen <corinna@sourceware.org> To: cygwin-cvs@sourceware.org Subject: [newlib-cygwin] Cygwin: pty: Fix a bug in the code removing set window title sequence. Date: Mon, 31 Aug 2020 14:48:04 +0000 (GMT) [thread overview] Message-ID: <20200831144804.937BC3851C17@sourceware.org> (raw) https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=6871c8418d102c8cfc6185757210d5c7f2dd4d46 commit 6871c8418d102c8cfc6185757210d5c7f2dd4d46 Author: Takashi Yano via Cygwin-patches <cygwin-patches@cygwin.com> Date: Mon Aug 31 21:02:13 2020 +0900 Cygwin: pty: Fix a bug in the code removing set window title sequence. - Commit 4e08fe42c9f3fdba63a57a8e3a6d705c4e10f50f has a bug which may cause infinite loop in pty_master_fwd_thread(). This patch fixes the issue. Diff: --- winsup/cygwin/fhandler_tty.cc | 13 +++++-------- 1 file changed, 5 insertions(+), 8 deletions(-) diff --git a/winsup/cygwin/fhandler_tty.cc b/winsup/cygwin/fhandler_tty.cc index e4e94f114..8bf39c3e6 100644 --- a/winsup/cygwin/fhandler_tty.cc +++ b/winsup/cygwin/fhandler_tty.cc @@ -2168,15 +2168,12 @@ fhandler_pty_master::pty_master_fwd_thread () /* Remove Set title sequence */ char *p0, *p1; p0 = outbuf; - while ((p0 = (char *) memmem (p0, rlen, "\033]0;", 4))) + while ((p0 = (char *) memmem (p0, rlen, "\033]0;", 4)) + && (p1 = (char *) memchr (p0, '\007', rlen-(p0-outbuf)))) { - p1 = (char *) memchr (p0, '\007', rlen - (p0 - outbuf)); - if (p1) - { - memmove (p0, p1 + 1, rlen - (p1 + 1 - outbuf)); - rlen -= p1 + 1 - p0; - wlen = rlen; - } + memmove (p0, p1 + 1, rlen - (p1 + 1 - outbuf)); + rlen -= p1 + 1 - p0; + wlen = rlen; } } /* Remove CSI > Pm m */
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