Don't let SIGINT handling block SIGCHLD indefinitely.

* atimer.c (block_atimers):
* callproc.c (block_child_signal): Block SIGINT too;
otherwise, its handler might now unblock signals that it shouldn't.
* keyboard.c (read_char): Clear signal mask, since we may
be in a SIGINT handler, and many signals may be masked.
* keyboard.c (handle_interrupt):
* sysdep.c (handle_arith_signal):
Clear signal mask instead of just unblocking the signal that
was received, since several signals may be blocked at this point.

Fixes: debbugs:17561

1 files changed, 13 insertions, 0 deletions

diff --git a/src/ChangeLog b/src/ChangeLog
index 33952e159bf..6ecf7dbee99 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,16 @@
+2014-05-30  Paul Eggert  <eggert@cs.ucla.edu>
+
+        Don't let SIGINT handling block SIGCHLD indefinitely (Bug#17561).
+        * atimer.c (block_atimers):
+        * callproc.c (block_child_signal): Block SIGINT too;
+        otherwise, its handler might now unblock signals that it shouldn't.
+        * keyboard.c (read_char): Clear signal mask, since we may
+        be in a SIGINT handler, and many signals may be masked.
+        * keyboard.c (handle_interrupt):
+        * sysdep.c (handle_arith_signal):
+        Clear signal mask instead of just unblocking the signal that
+        was received, since several signals may be blocked at this point.
+
 2014-05-29  Eli Zaretskii  <eliz@gnu.org>
 
         * Makefile.in (TEMACS_POST_LINK): Remove target.