/*
- Copyright 2015 IoT.bzh
+ Copyright 2015, 2016, 2017 IoT.bzh
author: José Bollo <jose.bollo@iot.bzh>
#include <stdio.h>
#include <time.h>
#include <getopt.h>
+#include <string.h>
-#include <json.h>
+#include <systemd/sd-bus.h>
+#include <systemd/sd-event.h>
+#include <json-c/json.h>
#include "verbose.h"
#include "utils-jbus.h"
+#include "utils-json.h"
#include "afm.h"
#include "afm-db.h"
+#include "afm-launch-mode.h"
#include "afm-run.h"
+/*
+ * name of the application
+ */
static const char appname[] = "afm-user-daemon";
-static void usage()
-{
- printf(
- "usage: %s [-q] [-v] [-r rootdir]... [-a appdir]...\n"
- "\n"
- " -a appdir adds an application directory\n"
- " -r rootdir adds a root directory of applications\n"
- " -d run as a daemon\n"
- " -q quiet\n"
- " -v verbose\n"
- "\n",
- appname
- );
-}
+/*
+ * string for printing usage
+ */
+static const char usagestr[] =
+ "usage: %s [-q] [-v] [-m mode] [-r rootdir]... [-a appdir]...\n"
+ "\n"
+ " -a appdir adds an application directory\n"
+ " -r rootdir adds a root directory of applications\n"
+ " -m mode set default launch mode (local or remote)\n"
+ " -d run as a daemon\n"
+ " -u addr address of user D-Bus to use\n"
+ " -s addr address of system D-Bus to use\n"
+ " -q quiet\n"
+ " -v verbose\n"
+ "\n";
-static struct option options[] = {
+/*
+ * Option definition for getopt_long
+ */
+static const char options_s[] = "hdqvr:a:m:";
+static struct option options_l[] = {
{ "root", required_argument, NULL, 'r' },
{ "application", required_argument, NULL, 'a' },
+ { "mode", required_argument, NULL, 'm' },
+ { "user-dbus", required_argument, NULL, 'u' },
+ { "system-dbus", required_argument, NULL, 's' },
{ "daemon", no_argument, NULL, 'd' },
{ "quiet", no_argument, NULL, 'q' },
{ "verbose", no_argument, NULL, 'v' },
{ NULL, 0, NULL, 0 }
};
+/*
+ * Connections to D-Bus
+ * This is an array for using the function
+ * jbus_read_write_dispatch_multiple
+ * directly without transformations.
+ */
static struct jbus *jbuses[2];
+#define system_bus jbuses[0]
+#define user_bus jbuses[1]
+
+/*
+ * Handle to the database of applications
+ */
static struct afm_db *afdb;
+/*
+ * Returned error strings
+ */
const char error_nothing[] = "[]";
const char error_bad_request[] = "\"bad request\"";
const char error_not_found[] = "\"not found\"";
const char error_cant_start[] = "\"can't start\"";
const char error_system[] = "\"system error\"";
-static const char *getappid(struct json_object *obj)
-{
- return json_type_string == json_object_get_type(obj) ? json_object_get_string(obj) : NULL;
-}
-static int getrunid(struct json_object *obj)
+/*
+ * retrieves the 'runid' in 'obj' parameters received with the
+ * request 'smsg' for the 'method'.
+ *
+ * Returns 1 in case of success.
+ * Otherwise, if the 'runid' can't be retrived, an error stating
+ * the bad request is replied for 'smsg' and 0 is returned.
+ */
+static int onrunid(struct sd_bus_message *smsg, struct json_object *obj,
+ const char *method, int *runid)
{
- return json_type_int == json_object_get_type(obj) ? json_object_get_int(obj) : 0;
+ if (!j_read_integer(obj, runid)
+ && !j_read_integer_at(obj, "runid", runid)) {
+ INFO("bad request method %s: %s", method,
+ json_object_to_json_string(obj));
+ jbus_reply_error_s(smsg, error_bad_request);
+ return 0;
+ }
+
+ INFO("method %s called for %d", method, *runid);
+ return 1;
}
-static void reply(struct jreq *jreq, struct json_object *resp, const char *errstr)
+/*
+ * Sends the reply 'resp' to the request 'smsg' if 'resp' is not NULL.
+ * Otherwise, when 'resp' is NULL replies the error string 'errstr'.
+ */
+static void reply(struct sd_bus_message *smsg, struct json_object *resp,
+ const char *errstr)
{
if (resp)
- jbus_reply_j(jreq, resp);
+ jbus_reply_j(smsg, resp);
else
- jbus_reply_error_s(jreq, errstr);
+ jbus_reply_error_s(smsg, errstr);
}
-static void reply_status(struct jreq *jreq, int status)
+/*
+ * Sends the reply "true" to the request 'smsg' if 'status' is zero.
+ * Otherwise, when 'status' is not zero replies the error string 'errstr'.
+ */
+static void reply_status(struct sd_bus_message *smsg, int status, const char *errstr)
{
if (status)
- jbus_reply_error_s(jreq, error_not_found);
+ jbus_reply_error_s(smsg, errstr);
else
- jbus_reply_s(jreq, "true");
+ jbus_reply_s(smsg, "true");
}
-static void on_runnables(struct jreq *jreq, struct json_object *obj)
+/*
+ * On query "runnables" from 'smsg' with parameters of 'obj'.
+ *
+ * Nothing is expected in 'obj' that can be anything.
+ */
+static void on_runnables(struct sd_bus_message *smsg, struct json_object *obj, void *unused)
{
- struct json_object *resp = afm_db_application_list(afdb);
- jbus_reply_j(jreq, resp);
+ struct json_object *resp;
+ INFO("method runnables called");
+ resp = afm_db_application_list(afdb);
+ jbus_reply_j(smsg, resp);
json_object_put(resp);
}
-static void on_detail(struct jreq *jreq, struct json_object *obj)
+/*
+ * On query "detail" from 'smsg' with parameters of 'obj'.
+ */
+static void on_detail(struct sd_bus_message *smsg, struct json_object *obj, void *unused)
{
- const char *appid = getappid(obj);
- struct json_object *resp = afm_db_get_application_public(afdb, appid);
- reply(jreq, resp, error_not_found);
+ const char *appid;
+ struct json_object *resp;
+
+ /* get the parameters */
+ if (j_read_string(obj, &appid))
+ ; /* appid as a string */
+ else if (j_read_string_at(obj, "id", &appid))
+ ; /* appid as obj.id string */
+ else {
+ INFO("method detail called but bad request!");
+ jbus_reply_error_s(smsg, error_bad_request);
+ return;
+ }
+
+ /* wants details for appid */
+ INFO("method detail called for %s", appid);
+ resp = afm_db_get_application_public(afdb, appid);
+ reply(smsg, resp, error_not_found);
json_object_put(resp);
}
-static void on_start(struct jreq *jreq, struct json_object *obj)
+/*
+ * On query "start" from 'smsg' with parameters of 'obj'.
+ */
+static void on_start(struct sd_bus_message *smsg, struct json_object *obj, void *unused)
{
- const char *appid;
- struct json_object *appli;
+ const char *appid, *modestr;
+ char *uri;
+ struct json_object *appli, *resp;
int runid;
char runidstr[20];
+ enum afm_launch_mode mode;
+
+ /* get the parameters */
+ mode = invalid_launch_mode;
+ if (j_read_string(obj, &appid)) {
+ mode = get_default_launch_mode();
+ } else if (j_read_string_at(obj, "id", &appid)) {
+ if (j_read_string_at(obj, "mode", &modestr)) {
+ mode = launch_mode_of_name(modestr);
+ } else {
+ mode = get_default_launch_mode();
+ }
+ }
+ if (!is_valid_launch_mode(mode)) {
+ jbus_reply_error_s(smsg, error_bad_request);
+ return;
+ }
+
+ /* get the application */
+ INFO("method start called for %s mode=%s", appid,
+ name_of_launch_mode(mode));
+ appli = afm_db_get_application(afdb, appid);
+ if (appli == NULL) {
+ jbus_reply_error_s(smsg, error_not_found);
+ return;
+ }
+
+ /* launch the application */
+ uri = NULL;
+ runid = afm_run_start(appli, mode, &uri);
+ if (runid <= 0) {
+ jbus_reply_error_s(smsg, error_cant_start);
+ free(uri);
+ return;
+ }
- appid = getappid(obj);
- if (appid == NULL)
- jbus_reply_error_s(jreq, error_bad_request);
+ if (uri == NULL) {
+ /* returns only the runid */
+ snprintf(runidstr, sizeof runidstr, "%d", runid);
+ runidstr[sizeof runidstr - 1] = 0;
+ jbus_reply_s(smsg, runidstr);
+ return;
+ }
+
+ /* returns the runid and its uri */
+ resp = json_object_new_object();
+ if (resp != NULL && j_add_integer(resp, "runid", runid)
+ && j_add_string(resp, "uri", uri))
+ jbus_reply_j(smsg, resp);
else {
- appli = afm_db_get_application(afdb, appid);
- if (appli == NULL)
- jbus_reply_error_s(jreq, error_not_found);
- else {
- runid = afm_run_start(appli);
- if (runid <= 0)
- jbus_reply_error_s(jreq, error_cant_start);
- else {
- snprintf(runidstr, sizeof runidstr, "%d", runid);
- runidstr[sizeof runidstr - 1] = 0;
- jbus_reply_s(jreq, runidstr);
- }
- }
+ afm_run_terminate(runid);
+ jbus_reply_error_s(smsg, error_system);
+ }
+ json_object_put(resp);
+ free(uri);
+}
+
+/*
+ * On query "once" from 'smsg' with parameters of 'obj'.
+ */
+static void on_once(struct sd_bus_message *smsg, struct json_object *obj, void *unused)
+{
+ const char *appid;
+ struct json_object *appli, *resp;
+ int runid;
+
+ /* get the parameters */
+ if (!j_read_string(obj, &appid) && !j_read_string_at(obj, "id", &appid)) {
+ jbus_reply_error_s(smsg, error_bad_request);
+ return;
+ }
+
+ /* get the application */
+ INFO("method once called for %s", appid);
+ appli = afm_db_get_application(afdb, appid);
+ if (appli == NULL) {
+ jbus_reply_error_s(smsg, error_not_found);
+ return;
+ }
+
+ /* launch the application */
+ runid = afm_run_once(appli);
+ if (runid <= 0) {
+ jbus_reply_error_s(smsg, error_cant_start);
+ return;
+ }
+
+ /* returns the state */
+ resp = afm_run_state(runid);
+ reply(smsg, resp, error_not_found);
+ json_object_put(resp);
+}
+
+/*
+ * On query "pause" from 'smsg' with parameters of 'obj'.
+ */
+static void on_pause(struct sd_bus_message *smsg, struct json_object *obj, void *unused)
+{
+ int runid, status;
+ if (onrunid(smsg, obj, "pause", &runid)) {
+ status = afm_run_pause(runid);
+ reply_status(smsg, status, error_not_found);
}
}
-static void on_stop(struct jreq *jreq, struct json_object *obj)
+/*
+ * On query "resume" from 'smsg' with parameters of 'obj'.
+ */
+static void on_resume(struct sd_bus_message *smsg, struct json_object *obj, void *unused)
{
- int runid = getrunid(obj);
- int status = afm_run_stop(runid);
- reply_status(jreq, status);
+ int runid, status;
+ if (onrunid(smsg, obj, "resume", &runid)) {
+ status = afm_run_resume(runid);
+ reply_status(smsg, status, error_not_found);
+ }
}
-static void on_continue(struct jreq *jreq, struct json_object *obj)
+/*
+ * On query "stop" from 'smsg' with parameters of 'obj'.
+ */
+static void on_stop(struct sd_bus_message *smsg, struct json_object *obj, void *unused)
{
- int runid = getrunid(obj);
- int status = afm_run_continue(runid);
- reply_status(jreq, status);
+ NOTICE("call to obsolete 'stop'");
+ on_pause(smsg, obj, unused);
}
-static void on_terminate(struct jreq *jreq, struct json_object *obj)
+/*
+ * On query "continue" from 'smsg' with parameters of 'obj'.
+ */
+static void on_continue(struct sd_bus_message *smsg, struct json_object *obj, void *unused)
{
- int runid = getrunid(obj);
- int status = afm_run_terminate(runid);
- reply_status(jreq, status);
+ NOTICE("call to obsolete 'continue'");
+ on_resume(smsg, obj, unused);
}
-static void on_runners(struct jreq *jreq, struct json_object *obj)
+/*
+ * On query "terminate" from 'smsg' with parameters of 'obj'.
+ */
+static void on_terminate(struct sd_bus_message *smsg, struct json_object *obj, void *unused)
{
- struct json_object *resp = afm_run_list();
- jbus_reply_j(jreq, resp);
- json_object_put(resp);
+ int runid, status;
+ if (onrunid(smsg, obj, "terminate", &runid)) {
+ status = afm_run_terminate(runid);
+ reply_status(smsg, status, error_not_found);
+ }
}
-static void on_state(struct jreq *jreq, struct json_object *obj)
+/*
+ * On query "runners" from 'smsg' with parameters of 'obj'.
+ */
+static void on_runners(struct sd_bus_message *smsg, struct json_object *obj, void *unused)
{
- int runid = getrunid(obj);
- struct json_object *resp = afm_run_state(runid);
- reply(jreq, resp, error_not_found);
+ struct json_object *resp;
+ INFO("method runners called");
+ resp = afm_run_list();
+ jbus_reply_j(smsg, resp);
json_object_put(resp);
}
-static void propagate(struct jreq *jreq, const char *msg, const char *method)
+/*
+ * On query "state" from 'smsg' with parameters of 'obj'.
+ */
+static void on_state(struct sd_bus_message *smsg, struct json_object *obj, void *unused)
+{
+ int runid;
+ struct json_object *resp;
+ if (onrunid(smsg, obj, "state", &runid)) {
+ resp = afm_run_state(runid);
+ reply(smsg, resp, error_not_found);
+ json_object_put(resp);
+ }
+}
+
+/*
+ * Calls the system daemon to achieve application management of
+ * the 'method' gotten from 'smsg' with the parameter's string 'msg'.
+ *
+ * The principle is very simple: call the corresponding system method
+ * and reply its response to the caller.
+ *
+ * The request and reply is synchronous and is blocking.
+ * It is possible to implment it in an asynchrounous way but it
+ * would brake the common behaviour. It would be a call like
+ * jbus_call_ss(system_bus, method, msg, callback, smsg)
+ */
+static void propagate(struct sd_bus_message *smsg, const char *msg, const char *method)
{
- char *reply = jbus_call_ss_sync(jbuses[0], method, msg);
- if (reply)
- jbus_reply_s(jreq, reply);
+ char *reply;
+ INFO("method %s propagated with %s", method, msg);
+ reply = jbus_call_ss_sync(system_bus, method, msg);
+ if (reply) {
+ jbus_reply_s(smsg, reply);
+ free(reply);
+ }
else
- jbus_reply_error_s(jreq, error_system);
+ jbus_reply_error_s(smsg, error_system);
}
-static void on_install(struct jreq *jreq, const char *msg)
+#if defined(EXPLICIT_CALL)
+/*
+ * On query "install" from 'smsg' with parameters of 'msg'.
+ */
+static void on_install(struct sd_bus_message *smsg, const char *msg, void *unused)
{
- return propagate(jreq, msg, "install");
+ return propagate(smsg, msg, "install");
}
-static void on_uninstall(struct jreq *jreq, const char *msg)
+/*
+ * On query "uninstall" from 'smsg' with parameters of 'msg'.
+ */
+static void on_uninstall(struct sd_bus_message *smsg, const char *msg, void *unused)
{
- return propagate(jreq, msg, "uninstall");
+ return propagate(smsg, msg, "uninstall");
}
+#endif
-static void on_signal_changed(struct json_object *obj)
+/*
+ * On system signaling that applications list changed
+ */
+static void on_signal_changed(struct json_object *obj, void *unused)
{
/* update the database */
afm_db_update_applications(afdb);
- /* propagate now */
- jbus_send_signal_j(jbuses[1], "changed", obj);
+ /* re-propagate now */
+ jbus_send_signal_j(user_bus, "changed", obj);
}
+/*
+ * Tiny routine to daemonize the program
+ * Return 0 on success or -1 on failure.
+ */
static int daemonize()
{
int rc = fork();
return 0;
}
+/*
+ * Opens a sd-bus connection and returns it in 'ret'.
+ * The sd-bus connexion is intended to be for user if 'isuser'
+ * is not null. The adress is the default address when 'address'
+ * is NULL or, otherwise, the given address.
+ * It might be necessary to pass the address as an argument because
+ * library systemd uses secure_getenv to retrieves the default
+ * addresses and secure_getenv might return NULL in some cases.
+ */
+static int open_bus(sd_bus **ret, int isuser, const char *address)
+{
+ sd_bus *b;
+ int rc;
+
+ if (address == NULL)
+ return (isuser ? sd_bus_open_user : sd_bus_open_system)(ret);
+
+ rc = sd_bus_new(&b);
+ if (rc < 0)
+ return rc;
+
+ rc = sd_bus_set_address(b, address);
+ if (rc < 0)
+ goto fail;
+
+ sd_bus_set_bus_client(b, 1);
+
+ rc = sd_bus_start(b);
+ if (rc < 0)
+ goto fail;
+
+ *ret = b;
+ return 0;
+
+fail:
+ sd_bus_unref(b);
+ return rc;
+}
+
+/*
+ * ENTRY POINT OF AFM-USER-DAEMON
+ */
int main(int ac, char **av)
{
- int i, daemon = 0;
+ int i, daemon = 0, rc;
+ enum afm_launch_mode mode;
+ struct sd_event *evloop;
+ struct sd_bus *sysbus, *usrbus;
+ const char *sys_bus_addr, *usr_bus_addr;
LOGAUTH(appname);
/* first interpretation of arguments */
- while ((i = getopt_long(ac, av, "hdqvr:a:", options, NULL)) >= 0) {
+ sys_bus_addr = NULL;
+ usr_bus_addr = NULL;
+ while ((i = getopt_long(ac, av, options_s, options_l, NULL)) >= 0) {
switch (i) {
case 'h':
- usage();
+ printf(usagestr, appname);
return 0;
case 'q':
if (verbosity)
break;
case 'a':
break;
+ case 'm':
+ mode = launch_mode_of_name(optarg);
+ if (!is_valid_launch_mode(mode)) {
+ ERROR("invalid mode '%s'", optarg);
+ return 1;
+ }
+ set_default_launch_mode(mode);
+ break;
+ case 'u':
+ usr_bus_addr = optarg;
+ break;
+ case 's':
+ sys_bus_addr = optarg;
+ break;
case ':':
ERROR("missing argument value");
return 1;
/* second interpretation of arguments */
optind = 1;
- while ((i = getopt_long(ac, av, "hdqvr:a:", options, NULL)) >= 0) {
+ while ((i = getopt_long(ac, av, options_s, options_l, NULL)) >= 0) {
switch (i) {
case 'r':
if (afm_db_add_root(afdb, optarg)) {
break;
case 'a':
if (afm_db_add_application(afdb, optarg)) {
- ERROR("can't add application %s", optarg);
- return 1;
- }
+ ERROR("can't add application %s", optarg);
+ return 1;
+ }
break;
}
}
return 1;
}
+ /* daemonize if requested */
if (daemon && daemonize()) {
ERROR("daemonization failed");
return 1;
}
- /* init observers */
- jbuses[0] = create_jbus(0, AFM_SYSTEM_DBUS_PATH);
- if (!jbuses[0]) {
+ /* get systemd objects */
+ rc = sd_event_new(&evloop);
+ if (rc < 0) {
+ ERROR("can't create event loop");
+ return 1;
+ }
+ rc = open_bus(&sysbus, 0, sys_bus_addr);
+ if (rc < 0) {
+ ERROR("can't create system bus");
+ return 1;
+ }
+ rc = sd_bus_attach_event(sysbus, evloop, 0);
+ if (rc < 0) {
+ ERROR("can't attach system bus to event loop");
+ return 1;
+ }
+ rc = open_bus(&usrbus, 1, usr_bus_addr);
+ if (rc < 0) {
+ ERROR("can't create user bus");
+ return 1;
+ }
+ rc = sd_bus_attach_event(usrbus, evloop, 0);
+ if (rc < 0) {
+ ERROR("can't attach user bus to event loop");
+ return 1;
+ }
+
+ /* connects to the system bus */
+ system_bus = create_jbus(sysbus, AFM_SYSTEM_DBUS_PATH);
+ if (!system_bus) {
ERROR("create_jbus failed for system");
return 1;
}
- if(jbus_on_signal_j(jbuses[0], "changed", on_signal_changed)) {
+
+ /* observe signals of system */
+ if(jbus_on_signal_j(system_bus, "changed", on_signal_changed, NULL)) {
ERROR("adding signal observer failed");
return 1;
}
- /* init service */
- jbuses[1] = create_jbus(1, AFM_USER_DBUS_PATH);
- if (!jbuses[1]) {
+ /* connect to the session bus */
+ user_bus = create_jbus(usrbus, AFM_USER_DBUS_PATH);
+ if (!user_bus) {
ERROR("create_jbus failed");
return 1;
}
- if(jbus_add_service_j(jbuses[1], "runnables", on_runnables)
- || jbus_add_service_j(jbuses[1], "detail", on_detail)
- || jbus_add_service_j(jbuses[1], "start", on_start)
- || jbus_add_service_j(jbuses[1], "terminate", on_terminate)
- || jbus_add_service_j(jbuses[1], "stop", on_stop)
- || jbus_add_service_j(jbuses[1], "continue", on_continue)
- || jbus_add_service_j(jbuses[1], "runners", on_runners)
- || jbus_add_service_j(jbuses[1], "state", on_state)
- || jbus_add_service_s(jbuses[1], "install", on_install)
- || jbus_add_service_s(jbuses[1], "uninstall", on_uninstall)) {
+
+ /* init services */
+ if (jbus_add_service_j(user_bus, "runnables", on_runnables, NULL)
+ || jbus_add_service_j(user_bus, "detail", on_detail, NULL)
+ || jbus_add_service_j(user_bus, "start", on_start, NULL)
+ || jbus_add_service_j(user_bus, "once", on_once, NULL)
+ || jbus_add_service_j(user_bus, "terminate", on_terminate, NULL)
+ || jbus_add_service_j(user_bus, "pause", on_pause, NULL)
+ || jbus_add_service_j(user_bus, "resume", on_resume, NULL)
+ || jbus_add_service_j(user_bus, "stop", on_stop, NULL)
+ || jbus_add_service_j(user_bus, "continue", on_continue, NULL)
+ || jbus_add_service_j(user_bus, "runners", on_runners, NULL)
+ || jbus_add_service_j(user_bus, "state", on_state, NULL)
+#if defined(EXPLICIT_CALL)
+ || jbus_add_service_s(user_bus, "install", on_install, NULL)
+ || jbus_add_service_s(user_bus, "uninstall", on_uninstall, NULL)
+#else
+ || jbus_add_service_s(user_bus, "install", (void (*)(struct sd_bus_message *, const char *, void *))propagate, "install")
+ || jbus_add_service_s(user_bus, "uninstall", (void (*)(struct sd_bus_message *, const char *, void *))propagate, "uninstall")
+#endif
+ ) {
ERROR("adding services failed");
return 1;
}
- /* start and run */
- if (jbus_start_serving(jbuses[1])) {
+ /* start servicing */
+ if (jbus_start_serving(user_bus) < 0) {
ERROR("can't start server");
return 1;
}
- while (jbus_read_write_dispatch_multiple(jbuses, 2, -1, 20) >= 0);
+
+ /* run until error */
+ for(;;)
+ sd_event_run(evloop, (uint64_t)-1);
return 0;
}
+
+
+
+
+
+
+
+
+
+
+
+
+
+
Code Review / src / app-framework-main.git / blobdiff