// this is the monitor for glob patterns
void uwsgi_imperial_monitor_glob(struct uwsgi_emperor_scanner *ues) {
glob_t g;
int i;
struct stat st;
struct uwsgi_instance *ui_current;
if (glob(ues->arg, GLOB_MARK | GLOB_NOCHECK, NULL, &g)) {
uwsgi_error("glob()");
return;
}
for (i = 0; i < (int) g.gl_pathc; i++) {
if (!uwsgi_emperor_is_valid(g.gl_pathv[i]))
continue;
if (stat(g.gl_pathv[i], &st))
continue;
if (!S_ISREG(st.st_mode))
continue;
ui_current = emperor_get(g.gl_pathv[i]);
if (ui_current) {
// check if uid or gid are changed, in such case, stop the instance
if (uwsgi.emperor_tyrant) {
if (st.st_uid != ui_current->uid || st.st_gid != ui_current->gid) {
uwsgi_log("!!! permissions of file %s changed. stopping the instance... !!!\n", g.gl_pathv[i]);
emperor_stop(ui_current);
continue;
}
}
// check if mtime is changed and the uWSGI instance must be reloaded
if (st.st_mtime > ui_current->last_mod) {
emperor_respawn(ui_current, st.st_mtime);
}
}
else {
emperor_add(ues, g.gl_pathv[i], st.st_mtime, NULL, 0, st.st_uid, st.st_gid);
}
}
globfree(&g);
// now check for removed instances
struct uwsgi_instance *c_ui = ui->ui_next;
while (c_ui) {
if (c_ui->scanner == ues) {
if (stat(c_ui->name, &st)) {
emperor_stop(c_ui);
}
}
c_ui = c_ui->ui_next;
}
}
void uwsgi_emperor_simple_do(struct uwsgi_emperor_scanner *ues, char *name, char *config, time_t ts, uid_t uid, gid_t gid) {
if (!uwsgi_emperor_is_valid(name))
return;
struct uwsgi_instance *ui_current = emperor_get(name);
if (ui_current) {
// check if uid or gid are changed, in such case, stop the instance
if (uwsgi.emperor_tyrant) {
if (uid != ui_current->uid || gid != ui_current->gid) {
uwsgi_log("[emperor-tyrant] !!! permissions of vassal %s changed. stopping the instance... !!!\n", name);
emperor_stop(ui_current);
return;
}
}
// check if mtime is changed and the uWSGI instance must be reloaded
if (ts > ui_current->last_mod) {
// make a new config (free the old one)
free(ui_current->config);
ui_current->config = config;
ui_current->config_len = strlen(config);
// always respawn (no need for amqp-style rules)
emperor_respawn(ui_current, ts);
}
}
else {
// make a copy of the config as it will be freed
emperor_add(ues, name, ts, uwsgi_str(config), strlen((const char *) config), uid, gid);
}
}
// this is the monitor for non-glob directories
void uwsgi_imperial_monitor_directory(struct uwsgi_emperor_scanner *ues) {
struct uwsgi_instance *ui_current;
struct dirent *de;
struct stat st;
if (chdir(ues->arg)) {
uwsgi_error("chdir()");
return;
}
DIR *dir = opendir(".");
while ((de = readdir(dir)) != NULL) {
if (!uwsgi_emperor_is_valid(de->d_name))
continue;
if (stat(de->d_name, &st))
continue;
if (!S_ISREG(st.st_mode))
continue;
ui_current = emperor_get(de->d_name);
if (ui_current) {
// check if uid or gid are changed, in such case, stop the instance
if (uwsgi.emperor_tyrant) {
if (st.st_uid != ui_current->uid || st.st_gid != ui_current->gid) {
uwsgi_log("!!! permissions of file %s changed. stopping the instance... !!!\n", de->d_name);
emperor_stop(ui_current);
continue;
}
}
// check if mtime is changed and the uWSGI instance must be reloaded
if (st.st_mtime > ui_current->last_mod) {
emperor_respawn(ui_current, st.st_mtime);
}
}
else {
emperor_add(ues, de->d_name, st.st_mtime, NULL, 0, st.st_uid, st.st_gid);
}
}
closedir(dir);
// now check for removed instances
struct uwsgi_instance *c_ui = ui->ui_next;
while (c_ui) {
if (c_ui->scanner == ues) {
if (stat(c_ui->name, &st)) {
emperor_stop(c_ui);
}
}
c_ui = c_ui->ui_next;
}
}
void uwsgi_emperor_simple_do(struct uwsgi_emperor_scanner *ues, char *name, char *config, time_t ts, uid_t uid, gid_t gid, char *socket_name) {
if (!uwsgi_emperor_is_valid(name))
return;
struct uwsgi_instance *ui_current = emperor_get(name);
if (ui_current) {
// check if uid or gid are changed, in such case, stop the instance
if (uwsgi.emperor_tyrant) {
if (uid != ui_current->uid || gid != ui_current->gid) {
uwsgi_log("[emperor-tyrant] !!! permissions of vassal %s changed. stopping the instance... !!!\n", name);
emperor_stop(ui_current);
return;
}
}
// check if mtime is changed and the uWSGI instance must be reloaded
if (ts > ui_current->last_mod) {
// make a new config (free the old one) if needed
if (config) {
if (ui_current->config)
free(ui_current->config);
ui_current->config = uwsgi_str(config);
ui_current->config_len = strlen(ui_current->config);
}
// reload the instance
emperor_respawn(ui_current, ts);
}
}
else {
// make a copy of the config as it will be freed
char *new_config = NULL;
size_t new_config_len = 0;
if (config) {
new_config = uwsgi_str(config);
new_config_len = strlen(new_config);
}
emperor_add(ues, name, ts, new_config, new_config_len, uid, gid, socket_name);
}
}
// this is the monitor for glob patterns
void uwsgi_imperial_monitor_glob(struct uwsgi_emperor_scanner *ues) {
glob_t g;
int i;
struct stat st;
struct uwsgi_instance *ui_current;
if (glob(ues->arg, GLOB_MARK | GLOB_NOCHECK, NULL, &g)) {
uwsgi_error("glob()");
return;
}
for (i = 0; i < (int) g.gl_pathc; i++) {
if (!uwsgi_emperor_is_valid(g.gl_pathv[i]))
continue;
if (stat(g.gl_pathv[i], &st))
continue;
if (!S_ISREG(st.st_mode))
continue;
ui_current = emperor_get(g.gl_pathv[i]);
uid_t t_uid = st.st_uid;
gid_t t_gid = st.st_gid;
if (uwsgi.emperor_tyrant && uwsgi.emperor_tyrant_nofollow) {
struct stat lst;
if (lstat(g.gl_pathv[i], &lst)) {
uwsgi_error("[emperor-tyrant]/lstat()");
if (ui_current) {
uwsgi_log("!!! availability of file %s changed. stopping the instance... !!!\n", g.gl_pathv[i]);
emperor_stop(ui_current);
}
continue;
}
t_uid = lst.st_uid;
t_gid = lst.st_gid;
}
if (ui_current) {
// check if uid or gid are changed, in such case, stop the instance
if (uwsgi.emperor_tyrant) {
if (t_uid != ui_current->uid || t_gid != ui_current->gid) {
uwsgi_log("!!! permissions of file %s changed. stopping the instance... !!!\n", g.gl_pathv[i]);
emperor_stop(ui_current);
continue;
}
}
// check if mtime is changed and the uWSGI instance must be reloaded
if (st.st_mtime > ui_current->last_mod) {
emperor_respawn(ui_current, st.st_mtime);
}
}
else {
char *socket_name = emperor_check_on_demand_socket(g.gl_pathv[i]);
emperor_add(ues, g.gl_pathv[i], st.st_mtime, NULL, 0, t_uid, t_gid, socket_name);
if (socket_name) free(socket_name);
}
}
globfree(&g);
// now check for removed instances
struct uwsgi_instance *c_ui = ui->ui_next;
while (c_ui) {
if (c_ui->scanner == ues) {
if (c_ui->zerg) {
char *colon = strrchr(c_ui->name, ':');
if (!colon) {
emperor_stop(c_ui);
}
else {
char *filename = uwsgi_calloc(0xff);
memcpy(filename, c_ui->name, colon - c_ui->name);
if (stat(filename, &st)) {
emperor_stop(c_ui);
}
free(filename);
}
}
else {
if (stat(c_ui->name, &st)) {
emperor_stop(c_ui);
}
}
}
c_ui = c_ui->ui_next;
}
}
// this is the monitor for non-glob directories
void uwsgi_imperial_monitor_directory(struct uwsgi_emperor_scanner *ues) {
struct uwsgi_instance *ui_current;
struct dirent *de;
struct stat st;
if (chdir(ues->arg)) {
uwsgi_error("chdir()");
return;
}
DIR *dir = opendir(".");
while ((de = readdir(dir)) != NULL) {
if (!uwsgi_emperor_is_valid(de->d_name))
continue;
if (stat(de->d_name, &st))
continue;
if (!S_ISREG(st.st_mode))
continue;
ui_current = emperor_get(de->d_name);
uid_t t_uid = st.st_uid;
gid_t t_gid = st.st_gid;
if (uwsgi.emperor_tyrant && uwsgi.emperor_tyrant_nofollow) {
struct stat lst;
if (lstat(de->d_name, &lst)) {
uwsgi_error("[emperor-tyrant]/lstat()");
if (ui_current) {
uwsgi_log("!!! availability of file %s changed. stopping the instance... !!!\n", de->d_name);
emperor_stop(ui_current);
}
continue;
}
t_uid = lst.st_uid;
t_gid = lst.st_gid;
}
if (ui_current) {
// check if uid or gid are changed, in such case, stop the instance
if (uwsgi.emperor_tyrant) {
if (t_uid != ui_current->uid || t_gid != ui_current->gid) {
uwsgi_log("!!! permissions of file %s changed. stopping the instance... !!!\n", de->d_name);
emperor_stop(ui_current);
continue;
}
}
// check if mtime is changed and the uWSGI instance must be reloaded
if (st.st_mtime > ui_current->last_mod) {
emperor_respawn(ui_current, st.st_mtime);
}
}
else {
char *socket_name = emperor_check_on_demand_socket(de->d_name);
emperor_add(ues, de->d_name, st.st_mtime, NULL, 0, t_uid, t_gid, socket_name);
if (socket_name) free(socket_name);
}
}
closedir(dir);
// now check for removed instances
struct uwsgi_instance *c_ui = ui->ui_next;
while (c_ui) {
if (c_ui->scanner == ues) {
if (c_ui->zerg) {
char *colon = strrchr(c_ui->name, ':');
if (!colon) {
emperor_stop(c_ui);
}
else {
char *filename = uwsgi_calloc(0xff);
memcpy(filename, c_ui->name, colon - c_ui->name);
if (stat(filename, &st)) {
emperor_stop(c_ui);
}
free(filename);
}
}
else {
if (stat(c_ui->name, &st)) {
emperor_stop(c_ui);
}
}
}
c_ui = c_ui->ui_next;
}
}
