X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=lib%2Fsigaction.c;h=e14bd9647e5b43f259ccd6ae348518522192a21a;hb=ab43907148e80f3895280928c05d4be93875580f;hp=9b0c92fdae8f74683bfa2c3538f68f62c3726d6f;hpb=cfb3906f210bec09f48f5d48511b72064153311a;p=gnulib.git

diff --git a/lib/sigaction.c b/lib/sigaction.c
index 9b0c92fda..e14bd9647 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, 2009, 2010 Free Software Foundation, Inc.
    Written by Eric Blake <ebb9@byu.net>, 2008.
 
    This program is free software: you can redistribute it and/or modify
@@ -35,11 +35,15 @@
    the situation by reading static storage in a signal handler, which
    POSIX warns is not generically async-signal-safe.  Oh well.
 
-   Additionally, SIGCHLD is not defined, so we don't implement
-   SA_NOCLDSTOP or SA_NOCLDWAIT; sigaltstack() is not present, so we
-   don't implement SA_ONSTACK; and siginterrupt() is not present, so
-   we don't implement SA_RESTART.  Supporting SA_SIGINFO is impossible
-   to do portably.
+   Additionally:
+     - 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 don't implement SA_SIGINFO because it is impossible to do so
+       portably.
 
    POSIX states that an application should not mix signal() and
    sigaction().  We support the use of signal() within the gnulib
@@ -60,6 +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);
 
@@ -79,7 +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 ();
     }
 
@@ -130,6 +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