+++ /dev/null
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
-/***
- This file is part of systemd.
-
- Copyright 2013 Lennart Poettering
-
- 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 <stdlib.h>
-#include <stdarg.h>
-#include <stdbool.h>
-#include <string.h>
-#include <stdio.h>
-
-#include "util.h"
-#include "errno-list.h"
-
-#include "sd-bus.h"
-#include "bus-error.h"
-
-#define BUS_ERROR_OOM SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_NO_MEMORY, "Out of memory")
-#define BUS_ERROR_FAILED SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_FAILED, "Operation failed")
-
-static int bus_error_name_to_errno(const char *name) {
- const char *p;
- int r;
- const name_error_mapping *m;
-
- if (!name)
- return EINVAL;
-
- p = startswith(name, "System.Error.");
- if (p) {
- r = errno_from_name(p);
- if (r <= 0)
- return EIO;
-
- return r;
- }
-
- m = bus_error_mapping_lookup(name, strlen(name));
- if (m)
- return m->code;
-
- return EIO;
-}
-
-static sd_bus_error errno_to_bus_error_const(int error) {
-
- if (error < 0)
- error = -error;
-
- switch (error) {
-
- case ENOMEM:
- return BUS_ERROR_OOM;
-
- case EPERM:
- case EACCES:
- return SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_ACCESS_DENIED, "Access denied");
-
- case EINVAL:
- return SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_INVALID_ARGS, "Invalid argument");
-
- case ESRCH:
- return SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_UNIX_PROCESS_ID_UNKNOWN, "No such process");
-
- case ENOENT:
- return SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_FILE_NOT_FOUND, "File not found");
-
- case EEXIST:
- return SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_FILE_EXISTS, "File exists");
-
- case ETIMEDOUT:
- case ETIME:
- return SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_TIMEOUT, "Timed out");
-
- case EIO:
- return SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_IO_ERROR, "Input/output error");
-
- case ENETRESET:
- case ECONNABORTED:
- case ECONNRESET:
- return SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_DISCONNECTED, "Disconnected");
-
- case ENOTSUP:
- return SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_NOT_SUPPORTED, "Not supported");
-
- case EADDRNOTAVAIL:
- return SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_BAD_ADDRESS, "Address not available");
-
- case ENOBUFS:
- return SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_LIMITS_EXCEEDED, "Limits exceeded");
-
- case EADDRINUSE:
- return SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_ADDRESS_IN_USE, "Address in use");
-
- case EBADMSG:
- return SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_INCONSISTENT_MESSAGE, "Inconsistent message");
- }
-
- return SD_BUS_ERROR_NULL;
-}
-
-static int errno_to_bus_error_name_new(int error, char **ret) {
- const char *name;
- char *n;
-
- if (error < 0)
- error = -error;
-
- name = errno_to_name(error);
- if (!name)
- return 0;
-
- n = strappend("System.Error.", name);
- if (!n)
- return -ENOMEM;
-
- *ret = n;
- return 1;
-}
-
-bool bus_error_is_dirty(sd_bus_error *e) {
- if (!e)
- return false;
-
- return e->name || e->message || e->_need_free != 0;
-}
-
-_public_ void sd_bus_error_free(sd_bus_error *e) {
- if (!e)
- return;
-
- if (e->_need_free > 0) {
- free((void*) e->name);
- free((void*) e->message);
- }
-
- e->name = e->message = NULL;
- e->_need_free = 0;
-}
-
-_public_ int sd_bus_error_set(sd_bus_error *e, const char *name, const char *message) {
-
- if (!name)
- return 0;
- if (!e)
- goto finish;
-
- assert_return(!bus_error_is_dirty(e), -EINVAL);
-
- e->name = strdup(name);
- if (!e->name) {
- *e = BUS_ERROR_OOM;
- return -ENOMEM;
- }
-
- if (message)
- e->message = strdup(message);
-
- e->_need_free = 1;
-
-finish:
- return -bus_error_name_to_errno(name);
-}
-
-int bus_error_setfv(sd_bus_error *e, const char *name, const char *format, va_list ap) {
-
- if (!name)
- return 0;
- if (!e)
- goto finish;
-
- assert_return(!bus_error_is_dirty(e), -EINVAL);
-
- e->name = strdup(name);
- if (!e->name) {
- *e = BUS_ERROR_OOM;
- return -ENOMEM;
- }
-
- if (format)
- vasprintf((char**) &e->message, format, ap);
-
- e->_need_free = 1;
-
-finish:
- return -bus_error_name_to_errno(name);
-}
-
-_public_ int sd_bus_error_setf(sd_bus_error *e, const char *name, const char *format, ...) {
-
- if (format) {
- int r;
- va_list ap;
-
- va_start(ap, format);
- r = bus_error_setfv(e, name, format, ap);
- va_end(ap);
-
- return r;
- }
-
- return sd_bus_error_set(e, name, NULL);
-}
-
-_public_ int sd_bus_error_copy(sd_bus_error *dest, const sd_bus_error *e) {
-
- if (!sd_bus_error_is_set(e))
- return 0;
- if (!dest)
- goto finish;
-
- assert_return(!bus_error_is_dirty(dest), -EINVAL);
-
- /*
- * _need_free < 0 indicates that the error is temporarily const, needs deep copying
- * _need_free == 0 indicates that the error is perpetually const, needs no deep copying
- * _need_free > 0 indicates that the error is fully dynamic, needs deep copying
- */
-
- if (e->_need_free == 0)
- *dest = *e;
- else {
- dest->name = strdup(e->name);
- if (!dest->name) {
- *dest = BUS_ERROR_OOM;
- return -ENOMEM;
- }
-
- if (e->message)
- dest->message = strdup(e->message);
-
- dest->_need_free = 1;
- }
-
-finish:
- return -bus_error_name_to_errno(e->name);
-}
-
-_public_ int sd_bus_error_set_const(sd_bus_error *e, const char *name, const char *message) {
- if (!name)
- return 0;
- if (!e)
- goto finish;
-
- assert_return(!bus_error_is_dirty(e), -EINVAL);
-
- *e = SD_BUS_ERROR_MAKE_CONST(name, message);
-
-finish:
- return -bus_error_name_to_errno(name);
-}
-
-_public_ int sd_bus_error_is_set(const sd_bus_error *e) {
- if (!e)
- return 0;
-
- return !!e->name;
-}
-
-_public_ int sd_bus_error_has_name(const sd_bus_error *e, const char *name) {
- if (!e)
- return 0;
-
- return streq_ptr(e->name, name);
-}
-
-_public_ int sd_bus_error_get_errno(const sd_bus_error* e) {
- if (!e)
- return 0;
-
- if (!e->name)
- return 0;
-
- return bus_error_name_to_errno(e->name);
-}
-
-static void bus_error_strerror(sd_bus_error *e, int error) {
- size_t k = 64;
- char *m;
-
- assert(e);
-
- for (;;) {
- char *x;
-
- m = new(char, k);
- if (!m)
- return;
-
- errno = 0;
- x = strerror_r(error, m, k);
- if (errno == ERANGE || strlen(x) >= k - 1) {
- free(m);
- k *= 2;
- continue;
- }
-
- if (!x || errno) {
- free(m);
- return;
- }
-
- if (x == m) {
- if (e->_need_free > 0) {
- /* Error is already dynamic, let's just update the message */
- free((char*) e->message);
- e->message = x;
-
- } else {
- char *t;
- /* Error was const so far, let's make it dynamic, if we can */
-
- t = strdup(e->name);
- if (!t) {
- free(m);
- return;
- }
-
- e->_need_free = 1;
- e->name = t;
- e->message = x;
- }
- } else {
- free(m);
-
- if (e->_need_free > 0) {
- char *t;
-
- /* Error is dynamic, let's hence make the message also dynamic */
- t = strdup(x);
- if (!t)
- return;
-
- free((char*) e->message);
- e->message = t;
- } else {
- /* Error is const, hence we can just override */
- e->message = x;
- }
- }
-
- return;
- }
-}
-
-_public_ int sd_bus_error_set_errno(sd_bus_error *e, int error) {
-
- if (error < 0)
- error = -error;
-
- if (!e)
- return -error;
- if (error == 0)
- return -error;
-
- assert_return(!bus_error_is_dirty(e), -EINVAL);
-
- /* First, try a const translation */
- *e = errno_to_bus_error_const(error);
-
- if (!sd_bus_error_is_set(e)) {
- int k;
-
- /* If that didn't work, try a dynamic one. */
-
- k = errno_to_bus_error_name_new(error, (char**) &e->name);
- if (k > 0)
- e->_need_free = 1;
- else if (k < 0) {
- *e = BUS_ERROR_OOM;
- return -error;
- } else
- *e = BUS_ERROR_FAILED;
- }
-
- /* Now, fill in the message from strerror() if we can */
- bus_error_strerror(e, error);
- return -error;
-}
-
-int bus_error_set_errnofv(sd_bus_error *e, int error, const char *format, va_list ap) {
- int r;
-
- if (error < 0)
- error = -error;
-
- if (!e)
- return -error;
- if (error == 0)
- return 0;
-
- assert_return(!bus_error_is_dirty(e), -EINVAL);
-
- /* First, try a const translation */
- *e = errno_to_bus_error_const(error);
-
- if (!sd_bus_error_is_set(e)) {
- int k;
-
- /* If that didn't work, try a dynamic one */
-
- k = errno_to_bus_error_name_new(error, (char**) &e->name);
- if (k > 0)
- e->_need_free = 1;
- else if (k < 0) {
- *e = BUS_ERROR_OOM;
- return -ENOMEM;
- } else
- *e = BUS_ERROR_FAILED;
- }
-
- if (format) {
- char *m;
-
- /* First, let's try to fill in the supplied message */
-
- r = vasprintf(&m, format, ap);
- if (r >= 0) {
-
- if (e->_need_free <= 0) {
- char *t;
-
- t = strdup(e->name);
- if (t) {
- e->_need_free = 1;
- e->name = t;
- e->message = m;
- return -error;
- }
-
- free(m);
- } else {
- free((char*) e->message);
- e->message = m;
- return -error;
- }
- }
- }
-
- /* If that didn't work, use strerror() for the message */
- bus_error_strerror(e, error);
- return -error;
-}
-
-_public_ int sd_bus_error_set_errnof(sd_bus_error *e, int error, const char *format, ...) {
- int r;
-
- if (error < 0)
- error = -error;
-
- if (!e)
- return -error;
- if (error == 0)
- return 0;
-
- assert_return(!bus_error_is_dirty(e), -EINVAL);
-
- if (format) {
- va_list ap;
-
- va_start(ap, format);
- r = bus_error_set_errnofv(e, error, format, ap);
- va_end(ap);
-
- return r;
- }
-
- return sd_bus_error_set_errno(e, error);
-}
-
-const char *bus_error_message(const sd_bus_error *e, int error) {
-
- if (e) {
- /* Sometimes the D-Bus server is a little bit too verbose with
- * its error messages, so let's override them here */
- if (sd_bus_error_has_name(e, SD_BUS_ERROR_ACCESS_DENIED))
- return "Access denied";
-
- if (e->message)
- return e->message;
- }
-
- if (error < 0)
- error = -error;
-
- return strerror(error);
-}
~ianmdlvl / elogind.git / blobdiff