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
|
/***
This file is part of systemd.
Copyright 2013 Zbigniew Jędrzejewski-Szmek
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 <errno.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include "formats-util.h"
#include "install-printf.h"
#include "install.h"
#include "macro.h"
#include "specifier.h"
#include "string-util.h"
#include "unit-name.h"
#include "user-util.h"
static int specifier_prefix_and_instance(char specifier, void *data, void *userdata, char **ret) {
const UnitFileInstallInfo *i = userdata;
_cleanup_free_ char *prefix = NULL;
int r;
assert(i);
r = unit_name_to_prefix_and_instance(i->name, &prefix);
if (r < 0)
return r;
if (endswith(prefix, "@") && i->default_instance) {
char *ans;
ans = strjoin(prefix, i->default_instance, NULL);
if (!ans)
return -ENOMEM;
*ret = ans;
} else {
*ret = prefix;
prefix = NULL;
}
return 0;
}
static int specifier_name(char specifier, void *data, void *userdata, char **ret) {
const UnitFileInstallInfo *i = userdata;
char *ans;
assert(i);
if (unit_name_is_valid(i->name, UNIT_NAME_TEMPLATE) && i->default_instance)
return unit_name_replace_instance(i->name, i->default_instance, ret);
ans = strdup(i->name);
if (!ans)
return -ENOMEM;
*ret = ans;
return 0;
}
static int specifier_prefix(char specifier, void *data, void *userdata, char **ret) {
const UnitFileInstallInfo *i = userdata;
assert(i);
return unit_name_to_prefix(i->name, ret);
}
static int specifier_instance(char specifier, void *data, void *userdata, char **ret) {
const UnitFileInstallInfo *i = userdata;
char *instance;
int r;
assert(i);
r = unit_name_to_instance(i->name, &instance);
if (r < 0)
return r;
if (isempty(instance)) {
instance = strdup(i->default_instance ?: "");
if (!instance)
return -ENOMEM;
}
*ret = instance;
return 0;
}
static int specifier_user_name(char specifier, void *data, void *userdata, char **ret) {
char *t;
/* If we are UID 0 (root), this will not result in NSS,
* otherwise it might. This is good, as we want to be able to
* run this in PID 1, where our user ID is 0, but where NSS
* lookups are not allowed. */
t = getusername_malloc();
if (!t)
return -ENOMEM;
*ret = t;
return 0;
}
static int specifier_user_id(char specifier, void *data, void *userdata, char **ret) {
if (asprintf(ret, UID_FMT, getuid()) < 0)
return -ENOMEM;
return 0;
}
int install_full_printf(UnitFileInstallInfo *i, const char *format, char **ret) {
/* This is similar to unit_full_printf() but does not support
* anything path-related.
*
* %n: the full id of the unit (foo@bar.waldo)
* %N: the id of the unit without the suffix (foo@bar)
* %p: the prefix (foo)
* %i: the instance (bar)
* %U the UID of the running user
* %u the username of running user
* %m the machine ID of the running system
* %H the host name of the running system
* %b the boot ID of the running system
* %v `uname -r` of the running system
*/
const Specifier table[] = {
{ 'n', specifier_name, NULL },
{ 'N', specifier_prefix_and_instance, NULL },
{ 'p', specifier_prefix, NULL },
{ 'i', specifier_instance, NULL },
{ 'U', specifier_user_id, NULL },
{ 'u', specifier_user_name, NULL },
{ 'm', specifier_machine_id, NULL },
{ 'H', specifier_host_name, NULL },
{ 'b', specifier_boot_id, NULL },
{ 'v', specifier_kernel_release, NULL },
{}
};
assert(i);
assert(format);
assert(ret);
return specifier_printf(format, table, i, ret);
}
|
