/* Wraps running_in_chroot() which is used in various places,
* but also adds an environment variable check so external processes
* can reliably force this on.
*/
bool running_in_chroot_or_offline(void) {
int r;
/* Added to support use cases like rpm-ostree, where from %post
* scripts we only want to execute "preset", but not "start"/"restart"
* for example.
*
* See ENVIRONMENT.md for docs.
*/
r = getenv_bool("SYSTEMD_OFFLINE");
if (r < 0)
log_debug_errno(r, "Parsing SYSTEMD_OFFLINE: %m");
else if (r == 0)
return false;
else
return true;
/* We've had this condition check for a long time which basically
* checks for legacy chroot case like Fedora's
* "mock", which is used for package builds. We don't want
* to try to start systemd services there, since without --new-chroot
* we don't even have systemd running, and even if we did, adding
* a concept of background daemons to builds would be an enormous change,
* requiring considering things like how the journal output is handled, etc.
* And there's really not a use case today for a build talking to a service.
*
* Note this call itself also looks for a different variable SYSTEMD_IGNORE_CHROOT=1.
*/
r = running_in_chroot();
if (r < 0)
log_debug_errno(r, "running_in_chroot(): %m");
else if (r > 0)
return true;
return false;
}
int dispatch_verb(int argc, char *argv[], const Verb verbs[], void *userdata) {
const Verb *verb;
const char *name;
unsigned i;
int left;
assert(verbs);
assert(verbs[0].dispatch);
assert(argc >= 0);
assert(argv);
assert(argc >= optind);
left = argc - optind;
name = argv[optind];
for (i = 0;; i++) {
bool found;
/* At the end of the list? */
if (!verbs[i].dispatch) {
if (name)
log_error("Unknown operation %s.", name);
else
log_error("Requires operation parameter.");
return -EINVAL;
}
if (name)
found = streq(name, verbs[i].verb);
else
found = !!(verbs[i].flags & VERB_DEFAULT);
if (found) {
verb = &verbs[i];
break;
}
}
assert(verb);
if (!name)
left = 1;
if (verb->min_args != VERB_ANY &&
(unsigned) left < verb->min_args) {
log_error("Too few arguments.");
return -EINVAL;
}
if (verb->max_args != VERB_ANY &&
(unsigned) left > verb->max_args) {
log_error("Too many arguments.");
return -EINVAL;
}
if ((verb->flags & VERB_NOCHROOT) && running_in_chroot() > 0) {
log_info("Running in chroot, ignoring request.");
return 0;
}
if (name)
return verb->dispatch(left, argv + optind, userdata);
else {
char* fake[2] = {
(char*) verb->verb,
NULL
};
return verb->dispatch(1, fake, userdata);
}
}
