[PATCH 2/3] examples: Work around lack of mingw sigaction()

[Eric Blake <eblake@xxxxxxxxxx>]

mingw lacks sigaction(); we were getting it from gnulib. But since
commit acf522e8 stopped linking examples against gnulib, we are
getting a build failure. Keep the examples standalone, and work
around mingw by using signal() instead.

Signed-off-by: Eric Blake <eblake@xxxxxxxxxx>
---
 examples/domtop/domtop.c            | 10 ++++------
 examples/object-events/event-test.c | 11 ++++-------
 2 files changed, 8 insertions(+), 13 deletions(-)

diff --git a/examples/domtop/domtop.c b/examples/domtop/domtop.c
index ada5a064fb..008065c651 100644
--- a/examples/domtop/domtop.c
+++ b/examples/domtop/domtop.c
@@ -266,10 +266,6 @@ do_top(virConnectPtr conn,
     int max_id = 0;
     int nparams = 0, then_nparams = 0, now_nparams = 0;
     virTypedParameterPtr then_params = NULL, now_params = NULL;
-    struct sigaction action_stop;
-
-    memset(&action_stop, 0, sizeof(action_stop));
-    action_stop.sa_handler = stop;

     /* Lookup the domain */
     if (!(dom = virDomainLookupByName(conn, dom_name))) {
@@ -295,8 +291,10 @@ do_top(virConnectPtr conn,
         goto cleanup;
     }

-    sigaction(SIGTERM, &action_stop, NULL);
-    sigaction(SIGINT, &action_stop, NULL);
+    /* The ideal program would use sigaction to set this handler, but
+     * this way is portable to mingw. */
+    signal(SIGTERM, stop);
+    signal(SIGINT, stop);

     run_top = true;
     while (run_top) {
diff --git a/examples/object-events/event-test.c b/examples/object-events/event-test.c
index 0c99fb33e3..fcf4492470 100644
--- a/examples/object-events/event-test.c
+++ b/examples/object-events/event-test.c
@@ -1147,13 +1147,8 @@ main(int argc, char **argv)
     virConnectPtr dconn = NULL;
     int callback1ret = -1;
     int callback16ret = -1;
-    struct sigaction action_stop;
     size_t i;

-    memset(&action_stop, 0, sizeof(action_stop));
-
-    action_stop.sa_handler = stop;
-
     if (argc > 1 && STREQ(argv[1], "--help")) {
         printf("%s uri\n", argv[0]);
         goto cleanup;
@@ -1184,8 +1179,10 @@ main(int argc, char **argv)
         goto cleanup;
     }

-    sigaction(SIGTERM, &action_stop, NULL);
-    sigaction(SIGINT, &action_stop, NULL);
+    /* The ideal program would use sigaction to set this handler, but
+     * this way is portable to mingw. */
+    signal(SIGTERM, stop);
+    signal(SIGINT, stop);

     printf("Registering event callbacks\n");

-- 
2.20.1

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