X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=lib%2Fsigaction.c;h=659c4ec531e341b533ba59a10dd69ea6d6704441;hb=5eb934dfd78a8ff086ffef87f5d4ec18e2d45cf7;hp=1bad8092f2795077329db8ed282fbcfca6872805;hpb=371a3a2d058f3709baeeb0dbe18ae21ddb11ea90;p=gnulib.git

diff --git a/lib/sigaction.c b/lib/sigaction.c
index 1bad8092f..659c4ec53 100644
--- a/lib/sigaction.c
+++ b/lib/sigaction.c
@@ -1,5 +1,5 @@
 /* POSIX compatible signal blocking.
-   Copyright (C) 2008 Free Software Foundation, Inc.
+   Copyright (C) 2008-2012 Free Software Foundation, Inc.
    Written by Eric Blake <ebb9@byu.net>, 2008.
 
    This program is free software: you can redistribute it and/or modify
@@ -24,7 +24,7 @@
 #include <stdint.h>
 #include <stdlib.h>
 
-/* This implementation of sigaction is tailored to Woe32 behavior:
+/* This implementation of sigaction is tailored to native Windows behavior:
    signal() has SysV semantics (ie. the handler is uninstalled before
    it is invoked).  This is an inherent data race if an asynchronous
    signal is sent twice in a row before we can reinstall our handler,
@@ -39,9 +39,9 @@
      - We don't implement SA_NOCLDSTOP or SA_NOCLDWAIT, because SIGCHLD
        is not defined.
      - We don't implement SA_ONSTACK, because sigaltstack() is not present.
-     - We ignore SA_RESTART, because blocking Win32 calls are not interrupted
-       anyway when an asynchronous signal occurs, and the MSVCRT runtime
-       never sets errno to EINTR.
+     - We ignore SA_RESTART, because blocking native Windows API calls are
+       not interrupted anyway when an asynchronous signal occurs, and the
+       MSVCRT runtime never sets errno to EINTR.
      - We don't implement SA_SIGINFO because it is impossible to do so
        portably.
 
@@ -64,6 +64,14 @@
 # define SIGSTOP (-1)
 #endif
 
+/* On native Windows, as of 2008, the signal SIGABRT_COMPAT is an alias
+   for the signal SIGABRT.  Only one signal handler is stored for both
+   SIGABRT and SIGABRT_COMPAT.  SIGABRT_COMPAT is not a signal of its own.  */
+#if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
+# undef SIGABRT_COMPAT
+# define SIGABRT_COMPAT 6
+#endif
+
 /* A signal handler.  */
 typedef void (*handler_t) (int signal);
 
@@ -83,7 +91,7 @@ sigaction_handler (int sig)
     {
       /* Unexpected situation; be careful to avoid recursive abort.  */
       if (sig == SIGABRT)
-	signal (SIGABRT, SIG_DFL);
+        signal (SIGABRT, SIG_DFL);
       abort ();
     }
 
@@ -134,6 +142,11 @@ sigaction (int sig, const struct sigaction *restrict act,
       return -1;
     }
 
+#ifdef SIGABRT_COMPAT
+  if (sig == SIGABRT_COMPAT)
+    sig = SIGABRT;
+#endif
+
   /* POSIX requires sigaction() to be async-signal-safe.  In other
      words, if an asynchronous signal can occur while we are anywhere
      inside this function, the user's handler could then call