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#include "uwsgi.h"
extern struct uwsgi_server uwsgi;
#ifdef UWSGI_EVENT_FILEMONITOR_USE_INOTIFY
#ifndef OBSOLETE_LINUX_KERNEL
#include <sys/inotify.h>
#endif
#endif
static int fsmon_add(struct uwsgi_fsmon *fs) {
#ifdef UWSGI_EVENT_FILEMONITOR_USE_INOTIFY
#ifndef OBSOLETE_LINUX_KERNEL
static int inotify_fd = -1;
if (inotify_fd == -1) {
inotify_fd = inotify_init();
if (inotify_fd < 0) {
uwsgi_error("fsmon_add()/inotify_init()");
return -1;
}
if (event_queue_add_fd_read(uwsgi.master_queue, inotify_fd)) {
uwsgi_error("fsmon_add()/event_queue_add_fd_read()");
return -1;
}
}
int wd = inotify_add_watch(inotify_fd, fs->path, IN_ATTRIB | IN_CREATE | IN_DELETE | IN_DELETE_SELF | IN_MODIFY | IN_MOVE_SELF | IN_MOVED_FROM | IN_MOVED_TO);
if (wd < 0) {
uwsgi_error("fsmon_add()/inotify_add_watch()");
return -1;
}
fs->fd = inotify_fd;
fs->id = wd;
return 0;
#endif
#endif
#ifdef UWSGI_EVENT_FILEMONITOR_USE_KQUEUE
struct kevent kev;
int fd = open(fs->path, O_RDONLY);
if (fd < 0) {
uwsgi_error_open(fs->path);
uwsgi_error("fsmon_add()/open()");
return -1;
}
EV_SET(&kev, fd, EVFILT_VNODE, EV_ADD | EV_CLEAR, NOTE_WRITE | NOTE_DELETE | NOTE_EXTEND | NOTE_ATTRIB | NOTE_RENAME | NOTE_REVOKE, 0, 0);
if (kevent(uwsgi.master_queue, &kev, 1, NULL, 0, NULL) < 0) {
uwsgi_error("fsmon_add()/kevent()");
return -1;
}
fs->fd = fd;
return 0;
#endif
uwsgi_log("[uwsgi-fsmon] filesystem monitoring interface not available in this platform !!!\n");
return 1;
}
static void fsmon_reload(struct uwsgi_fsmon *fs) {
uwsgi_block_signal(SIGHUP);
grace_them_all(0);
uwsgi_unblock_signal(SIGHUP);
}
static void fsmon_brutal_reload(struct uwsgi_fsmon *fs) {
if (uwsgi.die_on_term) {
uwsgi_block_signal(SIGQUIT);
reap_them_all(0);
uwsgi_unblock_signal(SIGQUIT);
}
else {
uwsgi_block_signal(SIGTERM);
reap_them_all(0);
uwsgi_unblock_signal(SIGTERM);
}
}
static void fsmon_signal(struct uwsgi_fsmon *fs) {
uwsgi_route_signal(atoi((char *) fs->data));
}
void uwsgi_fsmon_setup() {
struct uwsgi_string_list *usl = NULL;
uwsgi_foreach(usl, uwsgi.fs_reload) {
uwsgi_register_fsmon(usl->value, fsmon_reload, NULL);
}
uwsgi_foreach(usl, uwsgi.fs_brutal_reload) {
uwsgi_register_fsmon(usl->value, fsmon_brutal_reload, NULL);
}
uwsgi_foreach(usl, uwsgi.fs_signal) {
char *copy = uwsgi_str(usl->value);
char *space = strchr(copy, ' ');
if (!space) {
uwsgi_log("[uwsgi-fsmon] invalid syntax: \"%s\"\n", usl->value);
free(copy);
continue;
}
*space = 0;
uwsgi_register_fsmon(copy, fsmon_signal, space + 1);
}
struct uwsgi_fsmon *fs = uwsgi.fsmon;
while (fs) {
if (fsmon_add(fs)) {
uwsgi_log("[uwsgi-fsmon] unable to register monitor for \"%s\"\n", fs->path);
}
else {
uwsgi_log("[uwsgi-fsmon] registered monitor for \"%s\"\n", fs->path);
}
fs = fs->next;
}
}
struct uwsgi_fsmon *uwsgi_register_fsmon(char *path, void (*func) (struct uwsgi_fsmon *), void *data) {
struct uwsgi_fsmon *old_fs = NULL, *fs = uwsgi.fsmon;
while(fs) {
old_fs = fs;
fs = fs->next;
}
fs = uwsgi_calloc(sizeof(struct uwsgi_fsmon));
fs->path = path;
fs->func = func;
fs->data = data;
if (old_fs) {
old_fs->next = fs;
}
else {
uwsgi.fsmon = fs;
}
return fs;
}
static struct uwsgi_fsmon *uwsgi_fsmon_ack(int interesting_fd) {
struct uwsgi_fsmon *found_fs = NULL;
struct uwsgi_fsmon *fs = uwsgi.fsmon;
while (fs) {
if (fs->fd == interesting_fd) {
found_fs = fs;
break;
}
fs = fs->next;
}
#ifdef UWSGI_EVENT_FILEMONITOR_USE_INOTIFY
#ifndef OBSOLETE_LINUX_KERNEL
if (!found_fs)
return NULL;
found_fs = NULL;
unsigned int isize = 0;
if (ioctl(interesting_fd, FIONREAD, &isize) < 0) {
uwsgi_error("uwsgi_fsmon_ack()/ioctl()");
return NULL;
}
if (isize == 0)
return NULL;
struct inotify_event *ie = uwsgi_malloc(isize);
// read from the inotify descriptor
ssize_t len = read(interesting_fd, ie, isize);
if (len < 0) {
free(ie);
uwsgi_error("uwsgi_fsmon_ack()/read()");
return NULL;
}
fs = uwsgi.fsmon;
while (fs) {
if (fs->fd == interesting_fd && fs->id == ie->wd) {
found_fs = fs;
break;
}
fs = fs->next;
}
free(ie);
#endif
#endif
return found_fs;
}
int uwsgi_fsmon_event(int interesting_fd) {
struct uwsgi_fsmon *fs = uwsgi_fsmon_ack(interesting_fd);
if (!fs)
return 0;
uwsgi_log_verbose("[uwsgi-fsmon] detected event on \"%s\"\n", fs->path);
fs->func(fs);
return 1;
}
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