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* [newlib-cygwin] Cygwin: console: Abort read() on signal if SA_RESTART is not set.
@ 2021-02-15 13:23 Corinna Vinschen
0 siblings, 0 replies; only message in thread
From: Corinna Vinschen @ 2021-02-15 13:23 UTC (permalink / raw)
To: cygwin-cvs
https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=ad2877505520025abfb9eef2696ac14aec1f8c2e
commit ad2877505520025abfb9eef2696ac14aec1f8c2e
Author: Takashi Yano via Cygwin-patches <cygwin-patches@cygwin.com>
Date: Sun Feb 14 18:42:50 2021 +0900
Cygwin: console: Abort read() on signal if SA_RESTART is not set.
- Currently, console read() keeps reading after SIGWINCH is sent
even if SA_RESTART flag is not set. With this patch, read()
returns EINTR on SIGWINCH if SA_RESTART flag is not set.
The same problem for SIGQUIT and SIGTSTP has also been fixed.
Diff:
---
winsup/cygwin/fhandler_console.cc | 7 +++----
winsup/cygwin/fhandler_termios.cc | 1 +
winsup/cygwin/tty.cc | 1 +
winsup/cygwin/tty.h | 1 +
4 files changed, 6 insertions(+), 4 deletions(-)
diff --git a/winsup/cygwin/fhandler_console.cc b/winsup/cygwin/fhandler_console.cc
index 3c0783575..78af6cf2b 100644
--- a/winsup/cygwin/fhandler_console.cc
+++ b/winsup/cygwin/fhandler_console.cc
@@ -586,12 +586,11 @@ wait_retry:
case input_ok: /* input ready */
break;
case input_signalled: /* signalled */
- release_input_mutex ();
- /* The signal will be handled by cygwait() above. */
- continue;
case input_winch:
release_input_mutex ();
- continue;
+ if (global_sigs[get_ttyp ()->last_sig].sa_flags & SA_RESTART)
+ continue;
+ goto sig_exit;
default:
/* Should not come here */
release_input_mutex ();
diff --git a/winsup/cygwin/fhandler_termios.cc b/winsup/cygwin/fhandler_termios.cc
index 9fbace95c..e8daf946b 100644
--- a/winsup/cygwin/fhandler_termios.cc
+++ b/winsup/cygwin/fhandler_termios.cc
@@ -133,6 +133,7 @@ tty_min::kill_pgrp (int sig)
siginfo_t si = {0};
si.si_signo = sig;
si.si_code = SI_KERNEL;
+ last_sig = sig;
for (unsigned i = 0; i < pids.npids; i++)
{
diff --git a/winsup/cygwin/tty.cc b/winsup/cygwin/tty.cc
index 41f81f694..7627cd6c7 100644
--- a/winsup/cygwin/tty.cc
+++ b/winsup/cygwin/tty.cc
@@ -251,6 +251,7 @@ tty::init ()
master_is_running_as_service = false;
req_xfer_input = false;
pcon_input_state = to_cyg;
+ last_sig = 0;
}
HANDLE
diff --git a/winsup/cygwin/tty.h b/winsup/cygwin/tty.h
index e1de7ab46..a8ddd68d6 100644
--- a/winsup/cygwin/tty.h
+++ b/winsup/cygwin/tty.h
@@ -48,6 +48,7 @@ public:
fh_devices ntty;
ULONGLONG last_ctrl_c; /* tick count of last ctrl-c */
bool is_console;
+ int last_sig;
IMPLEMENT_STATUS_FLAG (bool, initialized)
IMPLEMENT_STATUS_FLAG (bool, rstcons)
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