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7584d236 ZJS |
1 | /*** |
2 | This file is part of systemd. | |
3 | ||
4 | Copyright 2013 Zbigniew Jędrzejewski-Szmek | |
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 | ||
a8fbdf54 TA |
20 | #include <errno.h> |
21 | #include <stdio.h> | |
22 | #include <string.h> | |
23 | #include <unistd.h> | |
7584d236 | 24 | |
b1d4f8e1 LP |
25 | #include "formats-util.h" |
26 | #include "install-printf.h" | |
a8fbdf54 TA |
27 | #include "install.h" |
28 | #include "macro.h" | |
7584d236 ZJS |
29 | #include "specifier.h" |
30 | #include "unit-name.h" | |
b1d4f8e1 | 31 | #include "user-util.h" |
7584d236 | 32 | |
19f6d710 | 33 | static int specifier_prefix_and_instance(char specifier, void *data, void *userdata, char **ret) { |
cab6235f | 34 | UnitFileInstallInfo *i = userdata; |
19f6d710 | 35 | |
7584d236 ZJS |
36 | assert(i); |
37 | ||
7410616c | 38 | return unit_name_to_prefix_and_instance(i->name, ret); |
7584d236 ZJS |
39 | } |
40 | ||
19f6d710 | 41 | static int specifier_prefix(char specifier, void *data, void *userdata, char **ret) { |
cab6235f | 42 | UnitFileInstallInfo *i = userdata; |
19f6d710 | 43 | |
7584d236 ZJS |
44 | assert(i); |
45 | ||
7410616c | 46 | return unit_name_to_prefix(i->name, ret); |
7584d236 ZJS |
47 | } |
48 | ||
19f6d710 | 49 | static int specifier_instance(char specifier, void *data, void *userdata, char **ret) { |
cab6235f | 50 | UnitFileInstallInfo *i = userdata; |
7584d236 ZJS |
51 | char *instance; |
52 | int r; | |
53 | ||
54 | assert(i); | |
55 | ||
56 | r = unit_name_to_instance(i->name, &instance); | |
57 | if (r < 0) | |
19f6d710 LP |
58 | return r; |
59 | ||
60 | if (!instance) { | |
61 | instance = strdup(""); | |
62 | if (!instance) | |
63 | return -ENOMEM; | |
64 | } | |
65 | ||
66 | *ret = instance; | |
67 | return 0; | |
7584d236 ZJS |
68 | } |
69 | ||
19f6d710 | 70 | static int specifier_user_name(char specifier, void *data, void *userdata, char **ret) { |
79413b67 | 71 | char *t; |
3f0b2f0f | 72 | |
79413b67 LP |
73 | /* If we are UID 0 (root), this will not result in NSS, |
74 | * otherwise it might. This is good, as we want to be able to | |
75 | * run this in PID 1, where our user ID is 0, but where NSS | |
76 | * lookups are not allowed. */ | |
3f0b2f0f | 77 | |
79413b67 LP |
78 | t = getusername_malloc(); |
79 | if (!t) | |
80 | return -ENOMEM; | |
19f6d710 | 81 | |
79413b67 | 82 | *ret = t; |
19f6d710 | 83 | return 0; |
3f0b2f0f ZJS |
84 | } |
85 | ||
79413b67 LP |
86 | static int specifier_user_id(char specifier, void *data, void *userdata, char **ret) { |
87 | ||
88 | if (asprintf(ret, UID_FMT, getuid()) < 0) | |
89 | return -ENOMEM; | |
90 | ||
91 | return 0; | |
92 | } | |
3f0b2f0f | 93 | |
cab6235f | 94 | int install_full_printf(UnitFileInstallInfo *i, const char *format, char **ret) { |
7584d236 ZJS |
95 | |
96 | /* This is similar to unit_full_printf() but does not support | |
97 | * anything path-related. | |
98 | * | |
99 | * %n: the full id of the unit (foo@bar.waldo) | |
100 | * %N: the id of the unit without the suffix (foo@bar) | |
101 | * %p: the prefix (foo) | |
102 | * %i: the instance (bar) | |
103 | ||
79413b67 LP |
104 | * %U the UID of the running user |
105 | * %u the username of running user | |
7584d236 ZJS |
106 | * %m the machine ID of the running system |
107 | * %H the host name of the running system | |
108 | * %b the boot ID of the running system | |
6aaa8c2f | 109 | * %v `uname -r` of the running system |
7584d236 ZJS |
110 | */ |
111 | ||
112 | const Specifier table[] = { | |
113 | { 'n', specifier_string, i->name }, | |
114 | { 'N', specifier_prefix_and_instance, NULL }, | |
115 | { 'p', specifier_prefix, NULL }, | |
116 | { 'i', specifier_instance, NULL }, | |
117 | ||
79413b67 | 118 | { 'U', specifier_user_id, NULL }, |
3f0b2f0f | 119 | { 'u', specifier_user_name, NULL }, |
7584d236 ZJS |
120 | |
121 | { 'm', specifier_machine_id, NULL }, | |
122 | { 'H', specifier_host_name, NULL }, | |
123 | { 'b', specifier_boot_id, NULL }, | |
6aaa8c2f ZJS |
124 | { 'v', specifier_kernel_release, NULL }, |
125 | {} | |
7584d236 ZJS |
126 | }; |
127 | ||
128 | assert(i); | |
129 | assert(format); | |
19f6d710 | 130 | assert(ret); |
7584d236 | 131 | |
19f6d710 | 132 | return specifier_printf(format, table, i, ret); |
7584d236 | 133 | } |