Blame SOURCES/at-3.1.14-usePOSIXtimers.patch

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diff -up at-3.1.14/atd.c.timers at-3.1.14/atd.c
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--- at-3.1.14/atd.c.timers	2013-12-02 11:03:01.250080057 +0100
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+++ at-3.1.14/atd.c	2013-12-02 11:06:15.560243498 +0100
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@@ -831,6 +831,54 @@ run_loop()
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     return next_job;
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 }
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+#ifdef HAVE_TIMER_CREATE
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+timer_t timer;
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+struct itimerspec timeout;
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+
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+void timer_setup()
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+{
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+    struct sigevent sev;
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+
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+    sev.sigev_notify = SIGEV_SIGNAL;
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+    sev.sigev_signo = SIGHUP;
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+    sev.sigev_value.sival_ptr = &timer;
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+
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+    memset(&timeout, 0, sizeof(timeout));
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+
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+    if (timer_create(CLOCK_REALTIME, &sev, &timer) < 0)
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+           pabort("unable to create timer");
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+}
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+
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+time_t atd_gettime()
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+{
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+    struct timespec curtime;
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+
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+    clock_gettime(CLOCK_REALTIME, &curtime);
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+
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+    return curtime.tv_sec;
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+}
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+
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+void atd_setalarm(time_t next)
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+{
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+    timeout.it_value.tv_sec = next;
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+    timer_settime(timer, TIMER_ABSTIME, &timeout, NULL);
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+    pause();
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+}
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+#else
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+void timer_setup()
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+{
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+}
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+
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+time_t atd_gettime()
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+{
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+    return time(NULL);
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+}
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+
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+void atd_setalarm(time_t next)
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+{
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+    sleep(next - atd_gettime());
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+}
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+#endif
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 /* Global functions */
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 int
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@@ -936,7 +984,7 @@ main(int argc, char *argv[])
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     sigaction(SIGCHLD, &act, NULL);
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     if (!run_as_daemon) {
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-	now = time(NULL);
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+	now = atd_gettime();
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 	run_loop();
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 	exit(EXIT_SUCCESS);
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     }
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@@ -959,13 +1007,14 @@ main(int argc, char *argv[])
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     act.sa_handler = set_term;
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     sigaction(SIGINT, &act, NULL);
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+    timer_setup();
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     daemon_setup();
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     do {
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-	now = time(NULL);
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+	now = atd_gettime();
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 	next_invocation = run_loop();
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 	if (next_invocation > now) {
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-	    sleep(next_invocation - now);
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+	    atd_setalarm(next_invocation);
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 	}
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     } while (!term_signal);
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     daemon_cleanup();
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diff -up at-3.1.14/config.h.in.timers at-3.1.14/config.h.in
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--- at-3.1.14/config.h.in.timers	2013-12-02 11:00:27.000000000 +0100
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+++ at-3.1.14/config.h.in	2013-12-02 11:02:06.521033976 +0100
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@@ -38,6 +38,9 @@
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 /* Define to 1 if you have the `getloadavg' function. */
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 #undef HAVE_GETLOADAVG
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+/* Define to 1 if you have the `timer_create' function. */
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+#undef HAVE_TIMER_CREATE
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+
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 /* Define to 1 if you have the <getopt.h> header file. */
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 #undef HAVE_GETOPT_H
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diff -up at-3.1.14/configure.ac.timers at-3.1.14/configure.ac
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--- at-3.1.14/configure.ac.timers	2013-12-02 11:00:27.000000000 +0100
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+++ at-3.1.14/configure.ac	2013-12-02 11:02:45.217066560 +0100
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@@ -254,6 +254,10 @@ AC_CHECK_LIB(selinux, is_selinux_enabled
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 AC_SUBST(SELINUXLIB)
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 AC_SUBST(WITH_SELINUX)
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+dnl check for POSIX timer functions
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+AC_SEARCH_LIBS([timer_create],[rt])
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+AC_CHECK_FUNCS([timer_create])
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+
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 AC_MSG_CHECKING(groupname to run under)
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 AC_ARG_WITH(daemon_groupname,
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 [ --with-daemon_groupname=DAEMON_GROUPNAME	Groupname to run under (default daemon) ],