[PATCH 1/1] Cygwin: console: Fix deadlock at calling fork().
Takashi Yano
takashi.yano@nifty.ne.jp
Mon Aug 12 13:46:00 GMT 2019
- Calling fork() on console occasionally falls into deadlock. The reason
is not clear, however, this patch fixes this problem anyway.
---
winsup/cygwin/fhandler_console.cc | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/winsup/cygwin/fhandler_console.cc b/winsup/cygwin/fhandler_console.cc
index 3d26a0b90..4afb7efb7 100644
--- a/winsup/cygwin/fhandler_console.cc
+++ b/winsup/cygwin/fhandler_console.cc
@@ -168,8 +168,12 @@ fhandler_console::set_unit ()
if (created)
con.owner = getpid ();
}
- if (!created && shared_console_info && kill (con.owner, 0) == -1)
- con.owner = getpid ();
+ if (!created && shared_console_info)
+ {
+ pinfo p (con.owner);
+ if (!p)
+ con.owner = getpid ();
+ }
dev ().parse (devset);
if (devset != FH_ERROR)
--
2.21.0
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