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7584d236 ZJS |
1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2013 Zbigniew Jędrzejewski-Szmek | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
9 | under the terms of the GNU Lesser General Public License as published by | |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | Lesser General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU Lesser General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
21 | ||
7584d236 ZJS |
22 | #include <stdlib.h> |
23 | ||
24 | #include "specifier.h" | |
25 | #include "unit-name.h" | |
3f0b2f0f | 26 | #include "util.h" |
7584d236 | 27 | #include "install-printf.h" |
6482f626 | 28 | #include "formats-util.h" |
7584d236 | 29 | |
19f6d710 | 30 | static int specifier_prefix_and_instance(char specifier, void *data, void *userdata, char **ret) { |
cab6235f | 31 | UnitFileInstallInfo *i = userdata; |
19f6d710 | 32 | |
7584d236 ZJS |
33 | assert(i); |
34 | ||
7410616c | 35 | return unit_name_to_prefix_and_instance(i->name, ret); |
7584d236 ZJS |
36 | } |
37 | ||
19f6d710 | 38 | static int specifier_prefix(char specifier, void *data, void *userdata, char **ret) { |
cab6235f | 39 | UnitFileInstallInfo *i = userdata; |
19f6d710 | 40 | |
7584d236 ZJS |
41 | assert(i); |
42 | ||
7410616c | 43 | return unit_name_to_prefix(i->name, ret); |
7584d236 ZJS |
44 | } |
45 | ||
19f6d710 | 46 | static int specifier_instance(char specifier, void *data, void *userdata, char **ret) { |
cab6235f | 47 | UnitFileInstallInfo *i = userdata; |
7584d236 ZJS |
48 | char *instance; |
49 | int r; | |
50 | ||
51 | assert(i); | |
52 | ||
53 | r = unit_name_to_instance(i->name, &instance); | |
54 | if (r < 0) | |
19f6d710 LP |
55 | return r; |
56 | ||
57 | if (!instance) { | |
58 | instance = strdup(""); | |
59 | if (!instance) | |
60 | return -ENOMEM; | |
61 | } | |
62 | ||
63 | *ret = instance; | |
64 | return 0; | |
7584d236 ZJS |
65 | } |
66 | ||
19f6d710 | 67 | static int specifier_user_name(char specifier, void *data, void *userdata, char **ret) { |
cab6235f | 68 | UnitFileInstallInfo *i = userdata; |
3f0b2f0f | 69 | const char *username; |
7fd1b19b | 70 | _cleanup_free_ char *tmp = NULL; |
3f0b2f0f ZJS |
71 | char *printed = NULL; |
72 | ||
73 | assert(i); | |
74 | ||
75 | if (i->user) | |
76 | username = i->user; | |
77 | else | |
78 | /* get USER env from env or our own uid */ | |
79 | username = tmp = getusername_malloc(); | |
80 | ||
81 | switch (specifier) { | |
82 | case 'u': | |
83 | printed = strdup(username); | |
84 | break; | |
85 | case 'U': { | |
86 | /* fish username from passwd */ | |
87 | uid_t uid; | |
88 | int r; | |
89 | ||
90 | r = get_user_creds(&username, &uid, NULL, NULL, NULL); | |
91 | if (r < 0) | |
19f6d710 | 92 | return r; |
3f0b2f0f | 93 | |
1fa2f38f | 94 | if (asprintf(&printed, UID_FMT, uid) < 0) |
19f6d710 | 95 | return -ENOMEM; |
3f0b2f0f ZJS |
96 | break; |
97 | }} | |
98 | ||
19f6d710 LP |
99 | |
100 | *ret = printed; | |
101 | return 0; | |
3f0b2f0f ZJS |
102 | } |
103 | ||
104 | ||
cab6235f | 105 | int install_full_printf(UnitFileInstallInfo *i, const char *format, char **ret) { |
7584d236 ZJS |
106 | |
107 | /* This is similar to unit_full_printf() but does not support | |
108 | * anything path-related. | |
109 | * | |
110 | * %n: the full id of the unit (foo@bar.waldo) | |
111 | * %N: the id of the unit without the suffix (foo@bar) | |
112 | * %p: the prefix (foo) | |
113 | * %i: the instance (bar) | |
114 | ||
115 | * %U the UID of the configured user or running user | |
116 | * %u the username of the configured user or running user | |
117 | * %m the machine ID of the running system | |
118 | * %H the host name of the running system | |
119 | * %b the boot ID of the running system | |
6aaa8c2f | 120 | * %v `uname -r` of the running system |
7584d236 ZJS |
121 | */ |
122 | ||
123 | const Specifier table[] = { | |
124 | { 'n', specifier_string, i->name }, | |
125 | { 'N', specifier_prefix_and_instance, NULL }, | |
126 | { 'p', specifier_prefix, NULL }, | |
127 | { 'i', specifier_instance, NULL }, | |
128 | ||
3f0b2f0f ZJS |
129 | { 'U', specifier_user_name, NULL }, |
130 | { 'u', specifier_user_name, NULL }, | |
7584d236 ZJS |
131 | |
132 | { 'm', specifier_machine_id, NULL }, | |
133 | { 'H', specifier_host_name, NULL }, | |
134 | { 'b', specifier_boot_id, NULL }, | |
6aaa8c2f ZJS |
135 | { 'v', specifier_kernel_release, NULL }, |
136 | {} | |
7584d236 ZJS |
137 | }; |
138 | ||
139 | assert(i); | |
140 | assert(format); | |
19f6d710 | 141 | assert(ret); |
7584d236 | 142 | |
19f6d710 | 143 | return specifier_printf(format, table, i, ret); |
7584d236 | 144 | } |