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
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
|
/* SPDX-License-Identifier: LGPL-2.1+ */
/***
This file is part of systemd.
Copyright 2013 Zbigniew Jędrzejewski-Szmek
Copyright 2015 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 "acl-util.h"
#include "fs-util.h"
#include "hashmap.h"
#include "journal-internal.h"
#include "journal-util.h"
#include "log.h"
#include "strv.h"
#include "user-util.h"
static int access_check_var_log_journal(sd_journal *j, bool want_other_users) {
#if HAVE_ACL
_cleanup_strv_free_ char **g = NULL;
const char* dir;
#endif
int r;
assert(j);
/* If we are root, we should have access, don't warn. */
if (getuid() == 0)
return 0;
/* If we are in the 'systemd-journal' group, we should have
* access too. */
r = in_group("systemd-journal");
if (r < 0)
return log_error_errno(r, "Failed to check if we are in the 'systemd-journal' group: %m");
if (r > 0)
return 0;
#if HAVE_ACL
if (laccess("/run/log/journal", F_OK) >= 0)
dir = "/run/log/journal";
else
dir = "/var/log/journal";
/* If we are in any of the groups listed in the journal ACLs,
* then all is good, too. Let's enumerate all groups from the
* default ACL of the directory, which generally should allow
* access to most journal files too. */
r = acl_search_groups(dir, &g);
if (r < 0)
return log_error_errno(r, "Failed to search journal ACL: %m");
if (r > 0)
return 0;
/* Print a pretty list, if there were ACLs set. */
if (!strv_isempty(g)) {
_cleanup_free_ char *s = NULL;
/* Thre are groups in the ACL, let's list them */
r = strv_extend(&g, "systemd-journal");
if (r < 0)
return log_oom();
strv_sort(g);
strv_uniq(g);
s = strv_join(g, "', '");
if (!s)
return log_oom();
log_notice("Hint: You are currently not seeing messages from %s.\n"
" Users in groups '%s' can see all messages.\n"
" Pass -q to turn off this notice.",
want_other_users ? "other users and the system" : "the system",
s);
return 1;
}
#endif
/* If no ACLs were found, print a short version of the message. */
log_notice("Hint: You are currently not seeing messages from %s.\n"
" Users in the 'systemd-journal' group can see all messages. Pass -q to\n"
" turn off this notice.",
want_other_users ? "other users and the system" : "the system");
return 1;
}
int journal_access_check_and_warn(sd_journal *j, bool quiet, bool want_other_users) {
Iterator it;
void *code;
char *path;
int r = 0;
assert(j);
if (hashmap_isempty(j->errors)) {
if (ordered_hashmap_isempty(j->files) && !quiet)
log_notice("No journal files were found.");
return 0;
}
if (hashmap_contains(j->errors, INT_TO_PTR(-EACCES))) {
if (!quiet)
(void) access_check_var_log_journal(j, want_other_users);
if (ordered_hashmap_isempty(j->files))
r = log_error_errno(EACCES, "No journal files were opened due to insufficient permissions.");
}
HASHMAP_FOREACH_KEY(path, code, j->errors, it) {
int err;
err = abs(PTR_TO_INT(code));
switch (err) {
case EACCES:
continue;
case ENODATA:
log_warning_errno(err, "Journal file %s is truncated, ignoring file.", path);
break;
case EPROTONOSUPPORT:
log_warning_errno(err, "Journal file %1$s uses an unsupported feature, ignoring file.\n"
"Use SYSTEMD_LOG_LEVEL=debug journalctl --file=%1$s to see the details.",
path);
break;
case EBADMSG:
log_warning_errno(err, "Journal file %s corrupted, ignoring file.", path);
break;
default:
log_warning_errno(err, "An error was encountered while opening journal file or directory %s, ignoring file: %m", path);
break;
}
}
return r;
}
bool journal_field_valid(const char *p, size_t l, bool allow_protected) {
const char *a;
/* We kinda enforce POSIX syntax recommendations for
environment variables here, but make a couple of additional
requirements.
http://pubs.opengroup.org/onlinepubs/000095399/basedefs/xbd_chap08.html */
if (l == (size_t) -1)
l = strlen(p);
/* No empty field names */
if (l <= 0)
return false;
/* Don't allow names longer than 64 chars */
if (l > 64)
return false;
/* Variables starting with an underscore are protected */
if (!allow_protected && p[0] == '_')
return false;
/* Don't allow digits as first character */
if (p[0] >= '0' && p[0] <= '9')
return false;
/* Only allow A-Z0-9 and '_' */
for (a = p; a < p + l; a++)
if ((*a < 'A' || *a > 'Z') &&
(*a < '0' || *a > '9') &&
*a != '_')
return false;
return true;
}
|
