Implement shutdown components

* src/pies.h: Update comment.
* src/progman.c (register_prog0): Register shutdown components
in disabled state.
(program_shutdown): New function.
(progman_stop): Call program_shutdown.

* tests/shutdown.at: New test.
* tests/Makefile.am: Add new test.
* tests/testsuite.at: Likewise.
* tests/aux/startup: Rename to tests/aux/touchfile
* tests/startup.at: Reflect the change.

1 files changed, 58 insertions, 0 deletions

diff --git a/tests/shutdown.at b/tests/shutdown.at
new file mode 100644
index 0000000..79bec37
--- /dev/null
+++ b/tests/shutdown.at
@@ -0,0 +1,58 @@
+# This file is part of GNU pies testsuite. -*- Autotest -*-
+# Copyright (C) 2019 Sergey Poznyakoff
+#
+# GNU pies is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3, or (at your option)
+# any later version.
+#
+# GNU pies is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with GNU pies.  If not, see <http://www.gnu.org/licenses/>.
+
+AT_SETUP([Shutdown components])
+
+AT_CHECK([
+PIES_XFAIL_CHECK
+PIES_CONTROL_INIT
+comp_pid_file=$PWD/comp.pid
+
+cat > pies.conf <<_EOT
+component s {
+        mode shutdown;
+        command "$auxdir/touchfile $PWD 0 shutdown";
+}
+
+component test {
+        mode respawn;
+        command "$auxdir/respawn -append -pid $comp_pid_file";
+}
+_EOT
+
+pies --config-file control.conf --config-file pies.conf
+
+n=0
+while :
+do
+    if test -f $comp_pid_file; then
+        break
+    fi
+    sleep 1
+    n=$(($n + 1))
+    if test $n -gt 10; then
+        echo >&2 "timed out"
+        break
+    fi
+done
+
+PIES_STOP
+
+test -f shutdown
+])
+
+AT_CLEANUP
+