dccca82b1a
log.h really should only include the bare minimum of other headers, as it is really pulled into pretty much everything else and already in itself one of the most basic pieces of code we have. Let's hence drop inclusion of: 1. sd-id128.h because it's entirely unneeded in current log.h 2. errno.h, dito. 3. sys/signalfd.h which we can replace by a simple struct forward declaration 4. process-util.h which was needed for getpid_cached() which we now hide in a funciton log_emergency_level() instead, which nicely abstracts the details away. 5. sys/socket.h which was needed for struct iovec, but a simple struct forward declaration suffices for that too. Ultimately this actually makes our source tree larger (since users of the functionality above must now include it themselves, log.h won't do that for them), but I think it helps to untangle our web of includes a tiny bit. (Background: I'd like to isolate the generic bits of src/basic/ enough so that we can do a git submodule import into casync for it)
147 lines
4.7 KiB
C
147 lines
4.7 KiB
C
/* SPDX-License-Identifier: LGPL-2.1+ */
|
|
/***
|
|
This file is part of systemd.
|
|
|
|
Copyright 2014 Lennart Poettering
|
|
|
|
systemd is free software; you can redistribute it and/or modify it
|
|
under the terms of the GNU Lesser General Public License as published by
|
|
the Free Software Foundation; either version 2.1 of the License, or
|
|
(at your option) any later version.
|
|
|
|
systemd is distributed in the hope that it will be useful, but
|
|
WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public License
|
|
along with systemd; If not, see <http://www.gnu.org/licenses/>.
|
|
***/
|
|
|
|
#include <errno.h>
|
|
#include <getopt.h>
|
|
#include <stdbool.h>
|
|
#include <stddef.h>
|
|
#include <string.h>
|
|
|
|
#include "env-util.h"
|
|
#include "log.h"
|
|
#include "macro.h"
|
|
#include "process-util.h"
|
|
#include "string-util.h"
|
|
#include "verbs.h"
|
|
#include "virt.h"
|
|
|
|
/* 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 && r != -ENXIO)
|
|
log_debug_errno(r, "Failed to parse $SYSTEMD_OFFLINE: %m");
|
|
else if (r >= 0)
|
|
return r > 0;
|
|
|
|
/* 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");
|
|
|
|
return r > 0;
|
|
}
|
|
|
|
int dispatch_verb(int argc, char *argv[], const Verb verbs[], void *userdata) {
|
|
const Verb *verb;
|
|
const char *name;
|
|
unsigned i;
|
|
int left, r;
|
|
|
|
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_ONLINE_ONLY) && running_in_chroot_or_offline()) {
|
|
if (name)
|
|
log_info("Running in chroot, ignoring request: %s", name);
|
|
else
|
|
log_info("Running in chroot, ignoring request.");
|
|
return 0;
|
|
}
|
|
|
|
if (verb->flags & VERB_MUST_BE_ROOT) {
|
|
r = must_be_root();
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
|
|
if (name)
|
|
return verb->dispatch(left, argv + optind, userdata);
|
|
else {
|
|
char* fake[2] = {
|
|
(char*) verb->verb,
|
|
NULL
|
|
};
|
|
|
|
return verb->dispatch(1, fake, userdata);
|
|
}
|
|
}
|