Backing out patch for bug 171343. I need to do autoconf tests for siginfo_t and SA_SIGINFO, it seems.

profile/src/nsProfileAccess.cpp

@@ -1625,11 +1625,7 @@ static struct sigaction SIGABRT_oldact;
 static struct sigaction SIGSEGV_oldact;
 static struct sigaction SIGTERM_oldact;
 
-// There is no standard type definition for the type of sa_sigaction.
-typedef void (*my_sigaction_t)(int, siginfo_t*, void*);
-
-void nsProfileLock::FatalSignalHandler(int signo, siginfo_t* info,
-                                       void* context)
+void nsProfileLock::FatalSignalHandler(int signo)
 {
     // Remove any locks still held.
     RemovePidLockFiles();
@@ -1664,22 +1660,12 @@ void nsProfileLock::FatalSignalHandler(int signo, siginfo_t* info,
         break;
     }
 
-    if (oldact) {
-        if (oldact->sa_flags & SA_SIGINFO) {
-            if (oldact->sa_sigaction &&
-                oldact->sa_sigaction != (my_sigaction_t) SIG_DFL &&
-                oldact->sa_sigaction != (my_sigaction_t) SIG_IGN)
-            {
-                oldact->sa_sigaction(signo, info, context);
-            }
-        } else {
-            if (oldact->sa_handler &&
-                oldact->sa_handler != SIG_DFL &&
-                oldact->sa_handler != SIG_IGN)
-            {
-                oldact->sa_handler(signo);
-            }
-        }
+    if (oldact &&
+        oldact->sa_handler &&
+        oldact->sa_handler != SIG_DFL &&
+        oldact->sa_handler != SIG_IGN)
+    {
+        oldact->sa_handler(signo);
     }
 
     // Backstop exit call, just in case.
@@ -1943,16 +1929,14 @@ nsresult nsProfileLock::Lock(nsILocalFile* aFile)
                 // Don't arm a handler if the signal is being ignored, e.g.,
                 // because mozilla is run via nohup.
                 struct sigaction act, oldact;
-                act.sa_sigaction = FatalSignalHandler;
-                act.sa_flags = SA_SIGINFO;
+                act.sa_handler = FatalSignalHandler;
+                act.sa_flags = 0;
                 sigfillset(&act.sa_mask);
 
 #define CATCH_SIGNAL(signame)                                                 \
     PR_BEGIN_MACRO                                                            \
         if (sigaction(signame, NULL, &oldact) == 0 &&                         \
-            ((oldact.sa_flags & SA_SIGINFO) ?                                 \
-               (oldact.sa_sigaction != (my_sigaction_t) SIG_IGN) :            \
-               (oldact.sa_handler != SIG_IGN)))                               \
+            oldact.sa_handler != SIG_IGN)                                     \
         {                                                                     \
             sigaction(signame, &act, &signame##_oldact);                      \
         }                                                                     \

profile/src/nsProfileAccess.h

@@ -33,10 +33,6 @@
 #include <windows.h>
 #endif
 
-#ifdef XP_UNIX
-#include <signal.h>
-#endif
-
 class ProfileStruct
 {    
 public:
@@ -202,8 +198,7 @@ private:
     LHANDLE                 mLockFileHandle;
 #elif defined (XP_UNIX)
     static void             RemovePidLockFiles();
-    static void             FatalSignalHandler(int signo, siginfo_t* info,
-                                               void* context);
+    static void             FatalSignalHandler(int signo);
     static PRCList          mPidLockList;
     char*                   mPidLockFileName;
     int                     mLockFileDesc;