1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
|
/* SPDX-License-Identifier: LGPL-2.1+ */
#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 docs/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;
assert(verbs);
assert(verbs[0].dispatch);
assert(argc >= 0);
assert(argv);
assert(argc >= optind);
left = argc - optind;
argv += optind;
optind = 0;
name = argv[0];
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)
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
"Too few arguments.");
if (verb->max_args != VERB_ANY &&
(unsigned) left > verb->max_args)
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
"Too many arguments.");
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 (name)
return verb->dispatch(left, argv, userdata);
else {
char* fake[2] = {
(char*) verb->verb,
NULL
};
return verb->dispatch(1, fake, userdata);
}
}
|
