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1 | /*** | |
2 | This file is part of systemd. | |
3 | ||
4 | Copyright 2013 Lennart Poettering | |
5 | ||
6 | systemd is free software; you can redistribute it and/or modify it | |
7 | under the terms of the GNU Lesser General Public License as published by | |
8 | the Free Software Foundation; either version 2.1 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | systemd is distributed in the hope that it will be useful, but | |
12 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | Lesser General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU Lesser General Public License | |
17 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
18 | ***/ | |
19 | ||
20 | #if HAVE_VALGRIND_MEMCHECK_H | |
21 | #include <valgrind/memcheck.h> | |
22 | #endif | |
23 | ||
24 | #include <fcntl.h> | |
25 | #include <malloc.h> | |
26 | #include <sys/mman.h> | |
27 | #include <sys/prctl.h> | |
28 | ||
29 | /* When we include libgen.h because we need dirname() we immediately | |
30 | * undefine basename() since libgen.h defines it as a macro to the POSIX | |
31 | * version which is really broken. We prefer GNU basename(). */ | |
32 | #include <libgen.h> | |
33 | #undef basename | |
34 | ||
35 | #include "alloc-util.h" | |
36 | #include "bus-internal.h" | |
37 | #include "bus-kernel.h" | |
38 | #include "bus-label.h" | |
39 | #include "bus-message.h" | |
40 | #include "bus-util.h" | |
41 | #include "capability-util.h" | |
42 | #include "fd-util.h" | |
43 | #include "fileio.h" | |
44 | #include "format-util.h" | |
45 | #include "memfd-util.h" | |
46 | #include "parse-util.h" | |
47 | #include "stdio-util.h" | |
48 | #include "string-util.h" | |
49 | #include "strv.h" | |
50 | #include "user-util.h" | |
51 | #include "util.h" | |
52 | ||
53 | void close_and_munmap(int fd, void *address, size_t size) { | |
54 | if (size > 0) | |
55 | assert_se(munmap(address, PAGE_ALIGN(size)) >= 0); | |
56 | ||
57 | safe_close(fd); | |
58 | } | |
59 | ||
60 | void bus_flush_memfd(sd_bus *b) { | |
61 | unsigned i; | |
62 | ||
63 | assert(b); | |
64 | ||
65 | for (i = 0; i < b->n_memfd_cache; i++) | |
66 | close_and_munmap(b->memfd_cache[i].fd, b->memfd_cache[i].address, b->memfd_cache[i].mapped); | |
67 | } | |
68 | ||
69 | uint64_t attach_flags_to_kdbus(uint64_t mask) { | |
70 | uint64_t m = 0; | |
71 | ||
72 | if (mask & (SD_BUS_CREDS_UID|SD_BUS_CREDS_EUID|SD_BUS_CREDS_SUID|SD_BUS_CREDS_FSUID| | |
73 | SD_BUS_CREDS_GID|SD_BUS_CREDS_EGID|SD_BUS_CREDS_SGID|SD_BUS_CREDS_FSGID)) | |
74 | m |= KDBUS_ATTACH_CREDS; | |
75 | ||
76 | if (mask & (SD_BUS_CREDS_PID|SD_BUS_CREDS_TID|SD_BUS_CREDS_PPID)) | |
77 | m |= KDBUS_ATTACH_PIDS; | |
78 | ||
79 | if (mask & SD_BUS_CREDS_COMM) | |
80 | m |= KDBUS_ATTACH_PID_COMM; | |
81 | ||
82 | if (mask & SD_BUS_CREDS_TID_COMM) | |
83 | m |= KDBUS_ATTACH_TID_COMM; | |
84 | ||
85 | if (mask & SD_BUS_CREDS_EXE) | |
86 | m |= KDBUS_ATTACH_EXE; | |
87 | ||
88 | if (mask & SD_BUS_CREDS_CMDLINE) | |
89 | m |= KDBUS_ATTACH_CMDLINE; | |
90 | ||
91 | if (mask & (SD_BUS_CREDS_CGROUP|SD_BUS_CREDS_UNIT|SD_BUS_CREDS_USER_UNIT|SD_BUS_CREDS_SLICE|SD_BUS_CREDS_SESSION|SD_BUS_CREDS_OWNER_UID)) | |
92 | m |= KDBUS_ATTACH_CGROUP; | |
93 | ||
94 | if (mask & (SD_BUS_CREDS_EFFECTIVE_CAPS|SD_BUS_CREDS_PERMITTED_CAPS|SD_BUS_CREDS_INHERITABLE_CAPS|SD_BUS_CREDS_BOUNDING_CAPS)) | |
95 | m |= KDBUS_ATTACH_CAPS; | |
96 | ||
97 | if (mask & SD_BUS_CREDS_SELINUX_CONTEXT) | |
98 | m |= KDBUS_ATTACH_SECLABEL; | |
99 | ||
100 | if (mask & (SD_BUS_CREDS_AUDIT_SESSION_ID|SD_BUS_CREDS_AUDIT_LOGIN_UID)) | |
101 | m |= KDBUS_ATTACH_AUDIT; | |
102 | ||
103 | if (mask & SD_BUS_CREDS_WELL_KNOWN_NAMES) | |
104 | m |= KDBUS_ATTACH_NAMES; | |
105 | ||
106 | if (mask & SD_BUS_CREDS_DESCRIPTION) | |
107 | m |= KDBUS_ATTACH_CONN_DESCRIPTION; | |
108 | ||
109 | if (mask & SD_BUS_CREDS_SUPPLEMENTARY_GIDS) | |
110 | m |= KDBUS_ATTACH_AUXGROUPS; | |
111 | ||
112 | return m; | |
113 | } |