first attempt in implementinging execution logic

1 files changed, 182 insertions, 0 deletions

diff --git a/service.c b/service.c
new file mode 100644
index 0000000000..ac9c39c3c8
--- /dev/null
+++ b/service.c
@@ -0,0 +1,182 @@
+/*-*- Mode: C; c-basic-offset: 8 -*-*/
+
+#include <errno.h>
+
+#include "name.h"
+#include "service.h"
+#include "load-fragment.h"
+#include "load-dropin.h"
+
+static int service_load_sysv(Service *s) {
+        assert(s);
+
+        /* Load service data from SysV init scripts, preferably with
+         * LSB headers ... */
+
+        return -ENOENT;
+}
+
+static int service_load(Name *n) {
+        int r;
+        Service *s = SERVICE(n);
+
+        assert(s);
+
+        exec_context_defaults(&s->exec_context);
+
+        /* Load a .service file */
+        r = name_load_fragment(n);
+
+        /* Load a classic init script as a fallback */
+        if (r == -ENOENT)
+                r = service_load_sysv(s);
+
+        if (r < 0)
+                return r;
+
+        /* Load dropin directory data */
+        if ((r = name_load_dropin(n)) < 0)
+                return r;
+
+        return 0;
+}
+
+static void service_dump(Name *n, FILE *f, const char *prefix) {
+
+        static const char* const state_table[_SERVICE_STATE_MAX] = {
+                [SERVICE_DEAD] = "dead",
+                [SERVICE_START_PRE] = "start-pre",
+                [SERVICE_START] = "start",
+                [SERVICE_START_POST] = "post",
+                [SERVICE_RUNNING] = "running",
+                [SERVICE_RELOAD_PRE] = "reload-pre",
+                [SERVICE_RELOAD] = "reload",
+                [SERVICE_RELOAD_POST] = "reload-post",
+                [SERVICE_STOP_PRE] = "stop-pre",
+                [SERVICE_STOP] = "stop",
+                [SERVICE_SIGTERM] = "sigterm",
+                [SERVICE_SIGKILL] = "sigkill",
+                [SERVICE_STOP_POST] = "stop-post",
+                [SERVICE_MAINTAINANCE] = "maintainance"
+        };
+
+        static const char* const command_table[_SERVICE_EXEC_MAX] = {
+                [SERVICE_EXEC_START_PRE] = "StartPre",
+                [SERVICE_EXEC_START] = "Start",
+                [SERVICE_EXEC_START_POST] = "StartPost",
+                [SERVICE_EXEC_RELOAD_PRE] = "ReloadPre",
+                [SERVICE_EXEC_RELOAD] = "Reload",
+                [SERVICE_EXEC_RELOAD_POST] = "ReloadPost",
+                [SERVICE_EXEC_STOP_PRE] = "StopPre",
+                [SERVICE_EXEC_STOP] = "Stop",
+                [SERVICE_EXEC_STOP_POST] = "StopPost",
+        };
+
+        ServiceExecCommand c;
+        Service *s = SERVICE(n);
+
+        assert(s);
+
+        fprintf(f,
+                "%sService State: %s\n",
+                prefix, state_table[s->state]);
+
+        exec_context_dump(&s->exec_context, f, prefix);
+
+        for (c = 0; c < _SERVICE_EXEC_MAX; c++) {
+                ExecCommand *i;
+
+                LIST_FOREACH(i, s->exec_command[c])
+                        fprintf(f, "%s%s: %s\n", prefix, command_table[c], i->path);
+        }
+}
+
+static int service_set_state(Service *s, ServiceState state) {
+        assert(s);
+
+        s->state = state;
+        return 0;
+}
+
+static int service_start(Name *n) {
+        Service *s = SERVICE(n);
+
+        assert(s);
+
+        /* We cannot fulfill this request right now */
+        if (s->state == SERVICE_STOP_PRE ||
+            s->state == SERVICE_STOP ||
+            s->state == SERVICE_SIGTERM ||
+            s->state == SERVICE_SIGKILL ||
+            s->state == SERVICE_STOP_POST)
+                return -EAGAIN;
+
+        assert(s->state == SERVICE_DEAD || s->state == SERVICE_MAINTAINANCE);
+
+        return service_set_state(s, SERVICE_START_PRE);
+}
+
+static int service_stop(Name *n) {
+        Service *s = SERVICE(n);
+
+        assert(s);
+
+
+        return 0;
+}
+
+static int service_reload(Name *n) {
+        return 0;
+}
+
+static NameActiveState service_active_state(Name *n) {
+
+        static const NameActiveState table[_SERVICE_STATE_MAX] = {
+                [SERVICE_DEAD] = NAME_INACTIVE,
+                [SERVICE_START_PRE] = NAME_ACTIVATING,
+                [SERVICE_START] = NAME_ACTIVATING,
+                [SERVICE_START_POST] = NAME_ACTIVATING,
+                [SERVICE_RUNNING] = NAME_ACTIVE,
+                [SERVICE_RELOAD_PRE] = NAME_ACTIVE_RELOADING,
+                [SERVICE_RELOAD] = NAME_ACTIVE_RELOADING,
+                [SERVICE_RELOAD_POST] = NAME_ACTIVE_RELOADING,
+                [SERVICE_STOP_PRE] = NAME_DEACTIVATING,
+                [SERVICE_STOP] = NAME_DEACTIVATING,
+                [SERVICE_SIGTERM] = NAME_DEACTIVATING,
+                [SERVICE_SIGKILL] = NAME_DEACTIVATING,
+                [SERVICE_STOP_POST] = NAME_DEACTIVATING,
+                [SERVICE_MAINTAINANCE] = NAME_INACTIVE,
+        };
+
+        return table[SERVICE(n)->state];
+}
+
+static void service_free_hook(Name *n) {
+        Service *s = SERVICE(n);
+        unsigned c;
+
+        assert(s);
+
+        exec_context_free(&s->exec_context);
+
+        for (c = 0; c < _SERVICE_EXEC_MAX; c++)
+                exec_command_free_list(s->exec_command[c]);
+
+        if (s->socket)
+                s->socket->service = NULL;
+}
+
+const NameVTable service_vtable = {
+        .suffix = ".service",
+
+        .load = service_load,
+        .dump = service_dump,
+
+        .start = service_start,
+        .stop = service_stop,
+        .reload = service_reload,
+
+        .active_state = service_active_state,
+
+        .free_hook = service_free_hook
+};