1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
4 This file is part of systemd.
6 Copyright 2013 Lennart Poettering
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.
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.
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/>.
30 #include "errno-list.h"
33 #include "bus-error.h"
35 #define BUS_ERROR_OOM SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_NO_MEMORY, "Out of memory")
36 #define BUS_ERROR_FAILED SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_FAILED, "Operation failed")
38 static int bus_error_name_to_errno(const char *name) {
41 const name_error_mapping *m;
46 p = startswith(name, "System.Error.");
48 r = errno_from_name(p);
55 m = bus_error_mapping_lookup(name, strlen(name));
62 static sd_bus_error errno_to_bus_error_const(int error) {
74 return SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_ACCESS_DENIED, "Access denied");
77 return SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_INVALID_ARGS, "Invalid argument");
80 return SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_UNIX_PROCESS_ID_UNKNOWN, "No such process");
83 return SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_FILE_NOT_FOUND, "File not found");
86 return SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_FILE_EXISTS, "File exists");
90 return SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_TIMEOUT, "Timed out");
93 return SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_IO_ERROR, "Input/output error");
98 return SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_DISCONNECTED, "Disconnected");
101 return SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_NOT_SUPPORTED, "Not supported");
104 return SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_BAD_ADDRESS, "Address not available");
107 return SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_LIMITS_EXCEEDED, "Limits exceeded");
110 return SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_ADDRESS_IN_USE, "Address in use");
113 return SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_INCONSISTENT_MESSAGE, "Inconsistent message");
116 return SD_BUS_ERROR_NULL;
119 static int errno_to_bus_error_name_new(int error, char **ret) {
126 name = errno_to_name(error);
130 n = strappend("System.Error.", name);
138 bool bus_error_is_dirty(sd_bus_error *e) {
142 return e->name || e->message || e->_need_free != 0;
145 _public_ void sd_bus_error_free(sd_bus_error *e) {
149 if (e->_need_free > 0) {
150 free((void*) e->name);
151 free((void*) e->message);
154 e->name = e->message = NULL;
158 _public_ int sd_bus_error_set(sd_bus_error *e, const char *name, const char *message) {
165 assert_return(!bus_error_is_dirty(e), -EINVAL);
167 e->name = strdup(name);
174 e->message = strdup(message);
179 return -bus_error_name_to_errno(name);
182 int bus_error_setfv(sd_bus_error *e, const char *name, const char *format, va_list ap) {
189 assert_return(!bus_error_is_dirty(e), -EINVAL);
191 e->name = strdup(name);
197 /* Of we hit OOM on formatting the pretty message, we ignore
198 * this, since we at least managed to write the error name */
200 (void) vasprintf((char**) &e->message, format, ap);
205 return -bus_error_name_to_errno(name);
208 _public_ int sd_bus_error_setf(sd_bus_error *e, const char *name, const char *format, ...) {
214 va_start(ap, format);
215 r = bus_error_setfv(e, name, format, ap);
221 return sd_bus_error_set(e, name, NULL);
224 _public_ int sd_bus_error_copy(sd_bus_error *dest, const sd_bus_error *e) {
226 if (!sd_bus_error_is_set(e))
231 assert_return(!bus_error_is_dirty(dest), -EINVAL);
234 * _need_free < 0 indicates that the error is temporarily const, needs deep copying
235 * _need_free == 0 indicates that the error is perpetually const, needs no deep copying
236 * _need_free > 0 indicates that the error is fully dynamic, needs deep copying
239 if (e->_need_free == 0)
242 dest->name = strdup(e->name);
244 *dest = BUS_ERROR_OOM;
249 dest->message = strdup(e->message);
251 dest->_need_free = 1;
255 return -bus_error_name_to_errno(e->name);
258 _public_ int sd_bus_error_set_const(sd_bus_error *e, const char *name, const char *message) {
264 assert_return(!bus_error_is_dirty(e), -EINVAL);
266 *e = SD_BUS_ERROR_MAKE_CONST(name, message);
269 return -bus_error_name_to_errno(name);
272 _public_ int sd_bus_error_is_set(const sd_bus_error *e) {
279 _public_ int sd_bus_error_has_name(const sd_bus_error *e, const char *name) {
283 return streq_ptr(e->name, name);
286 _public_ int sd_bus_error_get_errno(const sd_bus_error* e) {
293 return bus_error_name_to_errno(e->name);
296 static void bus_error_strerror(sd_bus_error *e, int error) {
310 x = strerror_r(error, m, k);
311 if (errno == ERANGE || strlen(x) >= k - 1) {
323 if (e->_need_free > 0) {
324 /* Error is already dynamic, let's just update the message */
325 free((char*) e->message);
330 /* Error was const so far, let's make it dynamic, if we can */
345 if (e->_need_free > 0) {
348 /* Error is dynamic, let's hence make the message also dynamic */
353 free((char*) e->message);
356 /* Error is const, hence we can just override */
365 _public_ int sd_bus_error_set_errno(sd_bus_error *e, int error) {
375 assert_return(!bus_error_is_dirty(e), -EINVAL);
377 /* First, try a const translation */
378 *e = errno_to_bus_error_const(error);
380 if (!sd_bus_error_is_set(e)) {
383 /* If that didn't work, try a dynamic one. */
385 k = errno_to_bus_error_name_new(error, (char**) &e->name);
392 *e = BUS_ERROR_FAILED;
395 /* Now, fill in the message from strerror() if we can */
396 bus_error_strerror(e, error);
400 int bus_error_set_errnofv(sd_bus_error *e, int error, const char *format, va_list ap) {
411 assert_return(!bus_error_is_dirty(e), -EINVAL);
413 /* First, try a const translation */
414 *e = errno_to_bus_error_const(error);
416 if (!sd_bus_error_is_set(e)) {
419 /* If that didn't work, try a dynamic one */
421 k = errno_to_bus_error_name_new(error, (char**) &e->name);
428 *e = BUS_ERROR_FAILED;
434 /* First, let's try to fill in the supplied message */
436 r = vasprintf(&m, format, ap);
439 if (e->_need_free <= 0) {
452 free((char*) e->message);
459 /* If that didn't work, use strerror() for the message */
460 bus_error_strerror(e, error);
464 _public_ int sd_bus_error_set_errnof(sd_bus_error *e, int error, const char *format, ...) {
475 assert_return(!bus_error_is_dirty(e), -EINVAL);
480 va_start(ap, format);
481 r = bus_error_set_errnofv(e, error, format, ap);
487 return sd_bus_error_set_errno(e, error);
490 const char *bus_error_message(const sd_bus_error *e, int error) {
493 /* Sometimes the D-Bus server is a little bit too verbose with
494 * its error messages, so let's override them here */
495 if (sd_bus_error_has_name(e, SD_BUS_ERROR_ACCESS_DENIED))
496 return "Access denied";
505 return strerror(error);