return seen;
}
+
bool
-fw3_check_statefile(bool test_exists)
+fw3_lock(void)
{
- struct stat s;
+ lock_fd = open(FW3_LOCKFILE, O_CREAT|O_WRONLY, S_IRUSR|S_IWUSR);
- if (!stat(FW3_STATEFILE, &s))
+ if (lock_fd < 0)
{
- if (test_exists)
- return true;
-
- warn("The firewall appears to be started already. "
- "If it is indeed empty, remove the %s file and retry.",
- FW3_STATEFILE);
-
+ warn("Cannot create lock file %s: %s", FW3_LOCKFILE, strerror(errno));
return false;
}
- else if (test_exists)
+
+ if (flock(lock_fd, LOCK_EX))
{
- warn("The firewall appears to stopped already.");
+ warn("Cannot acquire exclusive lock: %s", strerror(errno));
return false;
}
- lock_fd = open(FW3_STATEFILE, O_CREAT | O_RDWR);
+ return true;
+}
+void
+fw3_unlock(void)
+{
if (lock_fd < 0)
+ return;
+
+ if (flock(lock_fd, LOCK_UN))
+ warn("Cannot release exclusive lock: %s", strerror(errno));
+
+ close(lock_fd);
+ unlink(FW3_LOCKFILE);
+
+ lock_fd = -1;
+}
+
+
+bool fw3_has_state(void)
+{
+ struct stat s;
+ return !stat(FW3_STATEFILE, &s);
+}
+
+void fw3_write_state(void *state)
+{
+ int fd;
+ struct fw3_state *s = state;
+ struct fw3_zone *z;
+ struct fw3_ipset *i;
+
+ fd = open(FW3_STATEFILE, O_CREAT|O_EXCL|O_WRONLY, S_IRUSR|S_IWUSR);
+
+ if (fd < 0)
{
- warn("Unable to create %s file", FW3_STATEFILE);
- goto fail;
+ warn("Cannot create state %s: %s", FW3_STATEFILE, strerror(errno));
+ return;
}
- if (flock(lock_fd, LOCK_EX))
+ list_for_each_entry(z, &s->zones, list)
{
- warn("Unable to acquire exclusive lock on %s file", FW3_STATEFILE);
- goto fail;
-
+ write(fd, "zone ", 5);
+ write(fd, z->name, strlen(z->name));
+ write(fd, "\n", 1);
}
- return true;
-
-fail:
- if (lock_fd > -1)
+ list_for_each_entry(i, &s->ipsets, list)
{
- close(lock_fd);
- lock_fd = -1;
+ if (i->external && *i->external)
+ continue;
+
+ write(fd, "ipset ", 6);
+ write(fd, i->name, strlen(i->name));
+ write(fd, "\n", 1);
}
- return false;
+ close(fd);
}
-void
-fw3_remove_statefile(void)
+void fw3_remove_state(void)
{
- if (lock_fd > -1)
- fw3_close_statefile();
-
if (unlink(FW3_STATEFILE))
- warn("Unable to delete %s file", FW3_STATEFILE);
-}
-
-void
-fw3_close_statefile(void)
-{
- flock(lock_fd, LOCK_UN);
- close(lock_fd);
-
- lock_fd = -1;
+ warn("Unable to remove state %s: %s", FW3_STATEFILE, strerror(errno));
}