[PATCH] main: Add handler for SIGSEGV signal

[Inga Stotland <inga.stotland@intel.com>]

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When an ell main loop based process is spun off as a child
and the parent process dies due to a segfault, the child process
is still left running and needs to detect the segfault condition.
To address this need, add watch and signal handler for SIGSEGV.
---
 ell/main.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/ell/main.c b/ell/main.c
index a479b74..712cfb7 100644
--- a/ell/main.c
+++ b/ell/main.c
@@ -619,6 +619,14 @@ static void sigterm_handler(void *user_data)
 		data->callback(SIGTERM, data->user_data);
 }
 
+static void sigsegv_handler(void *user_data)
+{
+	struct signal_data *data = user_data;
+
+	if (data->callback)
+		data->callback(SIGSEGV, data->user_data);
+}
+
 /**
  * l_main_run_with_signal:
  *
@@ -633,6 +641,7 @@ LIB_EXPORT int l_main_run_with_signal(l_main_signal_cb_t callback,
 	struct signal_data *data;
 	struct l_signal *sigint;
 	struct l_signal *sigterm;
+	struct l_signal *sigsegv;
 	int result;
 
 	data = l_new(struct signal_data, 1);
@@ -642,11 +651,13 @@ LIB_EXPORT int l_main_run_with_signal(l_main_signal_cb_t callback,
 
 	sigint = l_signal_create(SIGINT, sigint_handler, data, NULL);
 	sigterm = l_signal_create(SIGTERM, sigterm_handler, data, NULL);
+	sigsegv = l_signal_create(SIGSEGV, sigsegv_handler, data, NULL);
 
 	result = l_main_run();
 
 	l_signal_remove(sigint);
 	l_signal_remove(sigterm);
+	l_signal_remove(sigsegv);
 
 	l_free(data);
 
-- 
2.26.2