Make child processes exit when parent dies

The child processes call prctl() and when their parent process is
killed, they are sent SIGTERM using prctl. This is currently
Linux-specific, for non-Linuxes, a similar effect is achieved by
catching a set of common termination signals and sending SIGTERM to the
process group.

2 files changed, 12 insertions, 0 deletions

diff --git a/server/responder/nss/nsssrv.c b/server/responder/nss/nsssrv.c
index 248d5384..418e2f9f 100644
--- a/server/responder/nss/nsssrv.c
+++ b/server/responder/nss/nsssrv.c
@@ -365,6 +365,12 @@ int main(int argc, const char *argv[])
     ret = server_setup("sssd[nss]", 0, NSS_SRV_CONFIG, &main_ctx);
     if (ret != EOK) return 2;
 
+    ret = die_if_parent_died();
+    if (ret != EOK) {
+        /* This is not fatal, don't return */
+        DEBUG(2, ("Could not set up to exit when parent process does\n"));
+    }
+
     ret = nss_process_init(main_ctx,
                            main_ctx->event_ctx,
                            main_ctx->confdb_ctx);
diff --git a/server/responder/pam/pamsrv.c b/server/responder/pam/pamsrv.c
index 92fa4aec..bff2f7cc 100644
--- a/server/responder/pam/pamsrv.c
+++ b/server/responder/pam/pamsrv.c
@@ -227,6 +227,12 @@ int main(int argc, const char *argv[])
     ret = server_setup("sssd[pam]", 0, PAM_SRV_CONFIG, &main_ctx);
     if (ret != EOK) return 2;
 
+    ret = die_if_parent_died();
+    if (ret != EOK) {
+        /* This is not fatal, don't return */
+        DEBUG(2, ("Could not set up to exit when parent process does\n"));
+    }
+
     pam_dp_interface = get_pam_dp_interface();
     sss_cmds = register_sss_cmds();
     ret = sss_process_init(main_ctx,