/*
* launch_sessiond
*
* Check if the session daemon is available using
* the liblttngctl API for the check. If not, try to
* spawn a daemon.
*/
static int launch_sessiond(void)
{
int ret;
char *pathname = NULL;
ret = lttng_session_daemon_alive();
if (ret) {
/* Sessiond is alive, not an error */
ret = 0;
goto end;
}
/* Try command line option path */
pathname = opt_sessiond_path;
/* Try LTTNG_SESSIOND_PATH env variable */
if (pathname == NULL) {
pathname = getenv(DEFAULT_SESSIOND_PATH_ENV);
}
/* Try with configured path */
if (pathname == NULL) {
if (CONFIG_SESSIOND_BIN[0] != '\0') {
pathname = CONFIG_SESSIOND_BIN;
}
}
/* Try the default path */
if (pathname == NULL) {
pathname = INSTALL_BIN_PATH "/lttng-sessiond";
}
DBG("Session daemon binary path: %s", pathname);
/* Check existence and permissions */
ret = access(pathname, F_OK | X_OK);
if (ret < 0) {
ERR("No such file or access denied: %s", pathname);
goto end;
}
ret = spawn_sessiond(pathname);
end:
if (ret) {
ERR("Problem occurred while launching session daemon (%s)",
pathname);
}
return ret;
}
/*
* check_sessiond
*
* Check if the session daemon is available using
* the liblttngctl API for the check. If not, try to
* spawn a daemon.
*/
static int check_sessiond(void)
{
int ret;
char *pathname = NULL;
ret = lttng_session_daemon_alive();
if (ret == 0) { /* not alive */
/* Try command line option path */
pathname = opt_sessiond_path;
/* Try LTTNG_SESSIOND_PATH env variable */
if (pathname == NULL) {
pathname = getenv(DEFAULT_SESSIOND_PATH_ENV);
}
/* Try with configured path */
if (pathname == NULL) {
if (CONFIG_SESSIOND_BIN[0] != '\0') {
pathname = CONFIG_SESSIOND_BIN;
}
}
/* Let's rock and roll while trying the default path */
if (pathname == NULL) {
pathname = INSTALL_BIN_PATH "/lttng-sessiond";
}
DBG("Session daemon at: %s", pathname);
/* Check existence and permissions */
ret = access(pathname, F_OK | X_OK);
if (ret < 0) {
ERR("No such file or access denied: %s", pathname);
goto end;
}
ret = spawn_sessiond(pathname);
if (ret < 0) {
ERR("Problem occurred when starting %s", pathname);
}
}
end:
return ret;
}
