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1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2013 Lennart Poettering | |
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 | ||
22 | #include <errno.h> | |
23 | #include <stdlib.h> | |
24 | #include <stdarg.h> | |
25 | #include <stdbool.h> | |
26 | #include <string.h> | |
27 | #include <stdio.h> | |
28 | ||
29 | #include "util.h" | |
30 | ||
31 | #include "sd-bus.h" | |
32 | #include "bus-error.h" | |
33 | ||
fbfa72b0 LP |
34 | bool bus_error_is_dirty(sd_bus_error *e) { |
35 | if (!e) | |
36 | return 0; | |
37 | ||
38 | return e->name || e->message || e->need_free; | |
39 | } | |
40 | ||
de1c301e LP |
41 | void sd_bus_error_free(sd_bus_error *e) { |
42 | if (!e) | |
43 | return; | |
44 | ||
45 | if (e->need_free) { | |
46 | free((void*) e->name); | |
47 | free((void*) e->message); | |
48 | } | |
49 | ||
50 | e->name = e->message = NULL; | |
51 | e->need_free = false; | |
52 | } | |
53 | ||
54 | int sd_bus_error_set(sd_bus_error *e, const char *name, const char *format, ...) { | |
55 | char *n, *m = NULL; | |
56 | va_list ap; | |
57 | int r; | |
58 | ||
59 | if (!e) | |
60 | return 0; | |
fbfa72b0 | 61 | if (bus_error_is_dirty(e)) |
de1c301e LP |
62 | return -EINVAL; |
63 | if (!name) | |
64 | return -EINVAL; | |
65 | ||
66 | n = strdup(name); | |
67 | if (!n) | |
68 | return -ENOMEM; | |
69 | ||
70 | if (format) { | |
71 | va_start(ap, format); | |
72 | r = vasprintf(&m, format, ap); | |
73 | va_end(ap); | |
74 | ||
75 | if (r < 0) { | |
76 | free(n); | |
77 | return -ENOMEM; | |
78 | } | |
79 | } | |
80 | ||
81 | e->name = n; | |
82 | e->message = m; | |
83 | e->need_free = true; | |
84 | ||
85 | return 0; | |
86 | } | |
87 | ||
88 | int sd_bus_error_copy(sd_bus_error *dest, const sd_bus_error *e) { | |
89 | if (!dest) | |
90 | return 0; | |
fbfa72b0 | 91 | if (bus_error_is_dirty(dest)) |
de1c301e LP |
92 | return -EINVAL; |
93 | if (!sd_bus_error_is_set(e)) | |
94 | return 0; | |
95 | ||
96 | if (e->need_free) { | |
97 | char *x, *y = NULL; | |
98 | ||
99 | x = strdup(e->name); | |
100 | if (!x) | |
101 | return -ENOMEM; | |
102 | ||
103 | if (e->message) { | |
104 | y = strdup(e->message); | |
105 | if (!y) { | |
106 | free(x); | |
107 | return -ENOMEM; | |
108 | } | |
109 | } | |
110 | ||
111 | dest->name = x; | |
112 | dest->message = y; | |
113 | dest->need_free = true; | |
114 | } else | |
115 | *dest = *e; | |
116 | ||
117 | return 0; | |
118 | } | |
119 | ||
120 | void sd_bus_error_set_const(sd_bus_error *e, const char *name, const char *message) { | |
121 | if (!e) | |
122 | return; | |
fbfa72b0 | 123 | if (bus_error_is_dirty(e)) |
de1c301e LP |
124 | return; |
125 | ||
126 | e->name = name; | |
127 | e->message = message; | |
fbfa72b0 | 128 | e->need_free = false; |
de1c301e LP |
129 | } |
130 | ||
131 | int sd_bus_error_is_set(const sd_bus_error *e) { | |
132 | if (!e) | |
133 | return 0; | |
134 | ||
fbfa72b0 | 135 | return !!e->name; |
de1c301e LP |
136 | } |
137 | ||
138 | int sd_bus_error_has_name(const sd_bus_error *e, const char *name) { | |
139 | if (!e) | |
140 | return 0; | |
141 | ||
142 | return streq_ptr(e->name, name); | |
143 | } | |
144 | ||
145 | int bus_error_to_errno(const sd_bus_error* e) { | |
146 | ||
147 | /* Better replce this with a gperf table */ | |
148 | ||
149 | if (!e->name) | |
150 | return -EIO; | |
151 | ||
152 | if (streq(e->name, "org.freedesktop.DBus.Error.NoMemory")) | |
153 | return -ENOMEM; | |
154 | ||
155 | if (streq(e->name, "org.freedesktop.DBus.Error.AuthFailed") || | |
156 | streq(e->name, "org.freedesktop.DBus.Error.AccessDenied")) | |
157 | return -EPERM; | |
158 | ||
159 | return -EIO; | |
160 | } | |
161 | ||
162 | int bus_error_from_errno(sd_bus_error *e, int error) { | |
163 | if (!e) | |
164 | return error; | |
165 | ||
166 | if (error == -ENOMEM) | |
167 | sd_bus_error_set_const(e, "org.freedesktop.DBus.Error.NoMemory", strerror(-error)); | |
168 | else if (error == -EPERM || error == EACCES) | |
169 | sd_bus_error_set_const(e, "org.freedesktop.DBus.Error.AccessDenied", strerror(-error)); | |
170 | else | |
171 | sd_bus_error_set_const(e, "org.freedesktop.DBus.Error.Failed", "Operation failed"); | |
172 | ||
173 | return error; | |
174 | } |