ipaccess-proxy: generate coredump and exit upon SIGABRT received
Previous code relied on abort() switching sigaction to SIG_FDL +
retriggering SIGABRT in case the signal handler returns, which would
then generate the coredump + terminate the process.
However, if a SIGABRT is received from somewhere else (kill -SIGABRT),
then the process would print the talloc report and continue running,
which is not desired.
Change-Id: Iff920ff3dbeb48bd871b7578470f27fe9d0f9516
Fixes: OS#4865
diff --git a/src/ipaccess/ipaccess-proxy.c b/src/ipaccess/ipaccess-proxy.c
index 47465b4..d676038 100644
--- a/src/ipaccess/ipaccess-proxy.c
+++ b/src/ipaccess/ipaccess-proxy.c
@@ -1086,14 +1086,22 @@
return ret;
}
-static void signal_handler(int signal)
+static void signal_handler(int signum)
{
- fprintf(stdout, "signal %u received\n", signal);
+ fprintf(stdout, "signal %u received\n", signum);
- switch (signal) {
+ switch (signum) {
case SIGABRT:
- /* in case of abort, we want to obtain a talloc report
- * and then return to the caller, who will abort the process */
+ /* in case of abort, we want to obtain a talloc report and
+ * then run default SIGABRT handler, who will generate coredump
+ * and abort the process. abort() should do this for us after we
+ * return, but program wouldn't exit if an external SIGABRT is
+ * received.
+ */
+ talloc_report_full(tall_bsc_ctx, stderr);
+ signal(SIGABRT, SIG_DFL);
+ raise(SIGABRT);
+ break;
case SIGUSR1:
talloc_report_full(tall_bsc_ctx, stderr);
break;