[gdm] Remove handling of SIGSEGV/SIGFPE/SIGILL etc.

[Ray Strode <halfline src gnome org>]

commit 59d705966a50fe796b5ba7414697aa503476a7ec
Author: Colin Walters <walters verbum org>
Date:   Mon Dec 3 13:24:07 2012 -0500

    Remove handling of SIGSEGV/SIGFPE/SIGILL etc.
    
    Modern operating systems have "crash catching" functionality; for
    example, systemd comes with "systemd-coredump" which collects cores
    automatically.
    
    Attempting to handle these kinds of fatal signals internally is now
    much worse, because the original source of the problem will be masked.
    systemd won't collect a core file that would include a backtrace, for
    example.
    
    Also, with these removed, we can move forward porting to
    g_unix_signal_add().
    
    https://bugzilla.gnome.org/show_bug.cgi?id=676181

 daemon/main.c                     |    9 ---------
 daemon/session-worker-main.c      |   22 ----------------------
 daemon/simple-slave-main.c        |   22 ----------------------
 daemon/xdmcp-chooser-slave-main.c |   22 ----------------------
 gui/simple-greeter/greeter-main.c |    9 ---------
 5 files changed, 0 insertions(+), 84 deletions(-)
---
diff --git a/daemon/main.c b/daemon/main.c
index 62252aa..316e908 100644
--- a/daemon/main.c
+++ b/daemon/main.c
@@ -277,14 +277,6 @@ signal_cb (int      signo,
         ret = TRUE;
 
         switch (signo) {
-        case SIGFPE:
-        case SIGPIPE:
-                /* let the fatal signals interrupt us */
-                g_debug ("Caught signal %d, shutting down abnormally.", signo);
-                ret = FALSE;
-
-                break;
-
         case SIGINT:
         case SIGTERM:
                 /* let the fatal signals interrupt us */
@@ -445,7 +437,6 @@ main (int    argc,
         gdm_signal_handler_add_fatal (signal_handler);
         gdm_signal_handler_add (signal_handler, SIGTERM, signal_cb, NULL);
         gdm_signal_handler_add (signal_handler, SIGINT, signal_cb, NULL);
-        gdm_signal_handler_add (signal_handler, SIGFPE, signal_cb, NULL);
         gdm_signal_handler_add (signal_handler, SIGHUP, signal_cb, NULL);
         gdm_signal_handler_add (signal_handler, SIGUSR1, signal_cb, NULL);
 
diff --git a/daemon/session-worker-main.c b/daemon/session-worker-main.c
index e6b6dd0..57027cf 100644
--- a/daemon/session-worker-main.c
+++ b/daemon/session-worker-main.c
@@ -57,23 +57,6 @@ signal_cb (int      signo,
         ret = TRUE;
 
         switch (signo) {
-        case SIGSEGV:
-        case SIGBUS:
-        case SIGILL:
-        case SIGABRT:
-                g_debug ("Caught signal %d.", signo);
-
-                ret = FALSE;
-                break;
-
-        case SIGFPE:
-        case SIGPIPE:
-                /* let the fatal signals interrupt us */
-                g_debug ("Caught signal %d, shutting down abnormally.", signo);
-                ret = FALSE;
-
-                break;
-
         case SIGINT:
         case SIGTERM:
                 /* let the fatal signals interrupt us */
@@ -183,12 +166,7 @@ main (int    argc,
                                            (GDestroyNotify)g_main_loop_quit,
                                            main_loop);
         gdm_signal_handler_add (signal_handler, SIGINT, signal_cb, NULL);
-        gdm_signal_handler_add (signal_handler, SIGILL, signal_cb, NULL);
-        gdm_signal_handler_add (signal_handler, SIGBUS, signal_cb, NULL);
-        gdm_signal_handler_add (signal_handler, SIGFPE, signal_cb, NULL);
         gdm_signal_handler_add (signal_handler, SIGHUP, signal_cb, NULL);
-        gdm_signal_handler_add (signal_handler, SIGSEGV, signal_cb, NULL);
-        gdm_signal_handler_add (signal_handler, SIGABRT, signal_cb, NULL);
         gdm_signal_handler_add (signal_handler, SIGUSR1, signal_cb, NULL);
 
         g_main_loop_run (main_loop);
diff --git a/daemon/simple-slave-main.c b/daemon/simple-slave-main.c
index 3b18652..b6e6ee4 100644
--- a/daemon/simple-slave-main.c
+++ b/daemon/simple-slave-main.c
@@ -81,23 +81,6 @@ signal_cb (int      signo,
         ret = TRUE;
 
         switch (signo) {
-        case SIGSEGV:
-        case SIGBUS:
-        case SIGILL:
-        case SIGABRT:
-                g_debug ("Caught signal %d.", signo);
-
-                ret = FALSE;
-                break;
-
-        case SIGFPE:
-        case SIGPIPE:
-                /* let the fatal signals interrupt us */
-                g_debug ("Caught signal %d, shutting down abnormally.", signo);
-                ret = FALSE;
-
-                break;
-
         case SIGINT:
         case SIGTERM:
                 /* let the fatal signals interrupt us */
@@ -230,12 +213,7 @@ main (int    argc,
                                            main_loop);
         gdm_signal_handler_add (signal_handler, SIGTERM, signal_cb, NULL);
         gdm_signal_handler_add (signal_handler, SIGINT, signal_cb, NULL);
-        gdm_signal_handler_add (signal_handler, SIGILL, signal_cb, NULL);
-        gdm_signal_handler_add (signal_handler, SIGBUS, signal_cb, NULL);
-        gdm_signal_handler_add (signal_handler, SIGFPE, signal_cb, NULL);
         gdm_signal_handler_add (signal_handler, SIGHUP, signal_cb, NULL);
-        gdm_signal_handler_add (signal_handler, SIGSEGV, signal_cb, NULL);
-        gdm_signal_handler_add (signal_handler, SIGABRT, signal_cb, NULL);
         gdm_signal_handler_add (signal_handler, SIGUSR1, signal_cb, NULL);
         gdm_signal_handler_add (signal_handler, SIGUSR2, signal_cb, NULL);
 
diff --git a/daemon/xdmcp-chooser-slave-main.c b/daemon/xdmcp-chooser-slave-main.c
index 637848f..e6bd30c 100644
--- a/daemon/xdmcp-chooser-slave-main.c
+++ b/daemon/xdmcp-chooser-slave-main.c
@@ -80,23 +80,6 @@ signal_cb (int      signo,
         ret = TRUE;
 
         switch (signo) {
-        case SIGSEGV:
-        case SIGBUS:
-        case SIGILL:
-        case SIGABRT:
-                g_debug ("Caught signal %d.", signo);
-
-                ret = FALSE;
-                break;
-
-        case SIGFPE:
-        case SIGPIPE:
-                /* let the fatal signals interrupt us */
-                g_debug ("Caught signal %d, shutting down abnormally.", signo);
-                ret = FALSE;
-
-                break;
-
         case SIGINT:
         case SIGTERM:
                 /* let the fatal signals interrupt us */
@@ -223,12 +206,7 @@ main (int    argc,
                                            main_loop);
         gdm_signal_handler_add (signal_handler, SIGTERM, signal_cb, NULL);
         gdm_signal_handler_add (signal_handler, SIGINT, signal_cb, NULL);
-        gdm_signal_handler_add (signal_handler, SIGILL, signal_cb, NULL);
-        gdm_signal_handler_add (signal_handler, SIGBUS, signal_cb, NULL);
-        gdm_signal_handler_add (signal_handler, SIGFPE, signal_cb, NULL);
         gdm_signal_handler_add (signal_handler, SIGHUP, signal_cb, NULL);
-        gdm_signal_handler_add (signal_handler, SIGSEGV, signal_cb, NULL);
-        gdm_signal_handler_add (signal_handler, SIGABRT, signal_cb, NULL);
         gdm_signal_handler_add (signal_handler, SIGUSR1, signal_cb, NULL);
         gdm_signal_handler_add (signal_handler, SIGUSR2, signal_cb, NULL);
 
diff --git a/gui/simple-greeter/greeter-main.c b/gui/simple-greeter/greeter-main.c
index ba8efc0..d83493e 100644
--- a/gui/simple-greeter/greeter-main.c
+++ b/gui/simple-greeter/greeter-main.c
@@ -79,14 +79,6 @@ signal_cb (int      signo,
         ret = TRUE;
 
         switch (signo) {
-        case SIGFPE:
-        case SIGPIPE:
-                /* let the fatal signals interrupt us */
-                g_debug ("Caught signal %d, shutting down abnormally.", signo);
-                ret = FALSE;
-
-                break;
-
         case SIGINT:
         case SIGTERM:
                 /* let the fatal signals interrupt us */
@@ -297,7 +289,6 @@ main (int argc, char *argv[])
         gdm_signal_handler_add_fatal (signal_handler);
         gdm_signal_handler_add (signal_handler, SIGTERM, signal_cb, NULL);
         gdm_signal_handler_add (signal_handler, SIGINT, signal_cb, NULL);
-        gdm_signal_handler_add (signal_handler, SIGFPE, signal_cb, NULL);
         gdm_signal_handler_add (signal_handler, SIGHUP, signal_cb, NULL);
         gdm_signal_handler_add (signal_handler, SIGUSR1, signal_cb, NULL);