466 lines
12 KiB
C
466 lines
12 KiB
C
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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/***
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This file is part of systemd.
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Copyright 2013 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <errno.h>
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#include <stdlib.h>
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#include <stdarg.h>
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#include <stdbool.h>
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#include <string.h>
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#include <stdio.h>
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#include "util.h"
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#include "sd-bus.h"
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#include "bus-error.h"
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bool bus_error_is_dirty(sd_bus_error *e) {
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if (!e)
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return 0;
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return e->name || e->message || e->need_free;
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}
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_public_ void sd_bus_error_free(sd_bus_error *e) {
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if (!e)
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return;
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if (e->need_free) {
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free((void*) e->name);
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free((void*) e->message);
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}
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e->name = e->message = NULL;
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e->need_free = false;
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}
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_public_ int sd_bus_error_set(sd_bus_error *e, const char *name, const char *message) {
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char *n, *m = NULL;
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if (!e)
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return 0;
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assert_return(!bus_error_is_dirty(e), -EINVAL);
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assert_return(name, -EINVAL);
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n = strdup(name);
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if (!n)
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return -ENOMEM;
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if (message) {
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m = strdup(message);
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if (!m)
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return -ENOMEM;
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}
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e->name = n;
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e->message = m;
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e->need_free = true;
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return 0;
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}
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int bus_error_setfv(sd_bus_error *e, const char *name, const char *format, va_list ap) {
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char *n, *m = NULL;
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int r;
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if (!e)
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return 0;
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assert_return(!bus_error_is_dirty(e), -EINVAL);
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assert_return(name, -EINVAL);
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n = strdup(name);
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if (!n)
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return -ENOMEM;
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if (format) {
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r = vasprintf(&m, format, ap);
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if (r < 0) {
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free(n);
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return -ENOMEM;
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}
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}
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e->name = n;
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e->message = m;
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e->need_free = true;
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return 0;
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}
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_public_ int sd_bus_error_setf(sd_bus_error *e, const char *name, const char *format, ...) {
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if (format) {
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int r;
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va_list ap;
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va_start(ap, format);
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r = bus_error_setfv(e, name, format, ap);
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va_end(ap);
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return r;
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}
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return sd_bus_error_set(e, name, NULL);
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}
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_public_ int sd_bus_error_copy(sd_bus_error *dest, const sd_bus_error *e) {
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char *x, *y = NULL;
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if (!dest)
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return 0;
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if (!sd_bus_error_is_set(e))
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return 0;
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assert_return(!bus_error_is_dirty(dest), -EINVAL);
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x = strdup(e->name);
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if (!x)
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return -ENOMEM;
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if (e->message) {
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y = strdup(e->message);
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if (!y) {
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free(x);
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return -ENOMEM;
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}
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}
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dest->name = x;
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dest->message = y;
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dest->need_free = true;
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return 0;
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}
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_public_ int sd_bus_error_set_const(sd_bus_error *e, const char *name, const char *message) {
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if (!e)
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return 0;
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assert_return(!bus_error_is_dirty(e), -EINVAL);
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assert_return(name, -EINVAL);
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*e = SD_BUS_ERROR_MAKE(name, message);
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return 0;
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}
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_public_ int sd_bus_error_is_set(const sd_bus_error *e) {
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if (!e)
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return 0;
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return !!e->name;
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}
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_public_ int sd_bus_error_has_name(const sd_bus_error *e, const char *name) {
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if (!e)
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return 0;
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return streq_ptr(e->name, name);
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}
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_public_ int sd_bus_error_get_errno(const sd_bus_error* e) {
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/* Better replce this with a gperf table */
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if (!e)
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return EIO;
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if (!e->name)
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return EIO;
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if (streq(e->name, SD_BUS_ERROR_NO_MEMORY))
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return ENOMEM;
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if (streq(e->name, SD_BUS_ERROR_SERVICE_UNKNOWN))
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return EHOSTUNREACH;
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if (streq(e->name, SD_BUS_ERROR_NAME_HAS_NO_OWNER))
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return ENXIO;
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if (streq(e->name, SD_BUS_ERROR_NO_REPLY) ||
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streq(e->name, SD_BUS_ERROR_TIMEOUT) ||
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streq(e->name, "org.freedesktop.DBus.Error.TimedOut"))
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return ETIMEDOUT;
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if (streq(e->name, SD_BUS_ERROR_IO_ERROR))
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return EIO;
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if (streq(e->name, SD_BUS_ERROR_BAD_ADDRESS))
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return EADDRNOTAVAIL;
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if (streq(e->name, SD_BUS_ERROR_NOT_SUPPORTED))
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return ENOTSUP;
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if (streq(e->name, SD_BUS_ERROR_LIMITS_EXCEEDED))
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return ENOBUFS;
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if (streq(e->name, SD_BUS_ERROR_ACCESS_DENIED) ||
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streq(e->name, SD_BUS_ERROR_AUTH_FAILED))
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return EACCES;
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if (streq(e->name, SD_BUS_ERROR_NO_SERVER))
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return EHOSTDOWN;
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if (streq(e->name, SD_BUS_ERROR_NO_NETWORK))
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return ENONET;
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if (streq(e->name, SD_BUS_ERROR_ADDRESS_IN_USE))
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return EADDRINUSE;
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if (streq(e->name, SD_BUS_ERROR_DISCONNECTED))
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return ECONNRESET;
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if (streq(e->name, SD_BUS_ERROR_INVALID_ARGS) ||
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streq(e->name, SD_BUS_ERROR_INVALID_SIGNATURE) ||
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streq(e->name, "org.freedesktop.DBus.Error.MatchRuleInvalid") ||
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streq(e->name, "org.freedesktop.DBus.Error.InvalidFileContent"))
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return EINVAL;
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if (streq(e->name, SD_BUS_ERROR_FILE_NOT_FOUND) ||
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streq(e->name, "org.freedesktop.DBus.Error.MatchRuleNotFound"))
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return ENOENT;
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if (streq(e->name, SD_BUS_ERROR_FILE_EXISTS))
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return EEXIST;
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if (streq(e->name, SD_BUS_ERROR_UNKNOWN_METHOD) ||
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streq(e->name, SD_BUS_ERROR_UNKNOWN_OBJECT) ||
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streq(e->name, SD_BUS_ERROR_UNKNOWN_INTERFACE) ||
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streq(e->name, SD_BUS_ERROR_UNKNOWN_PROPERTY))
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return EBADR;
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if (streq(e->name, SD_BUS_ERROR_PROPERTY_READ_ONLY))
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return EROFS;
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if (streq(e->name, SD_BUS_ERROR_UNIX_PROCESS_ID_UNKNOWN) ||
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streq(e->name, "org.freedesktop.DBus.Error.SELinuxSecurityContextUnknown"))
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return ESRCH;
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if (streq(e->name, SD_BUS_ERROR_INCONSISTENT_MESSAGE))
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return EBADMSG;
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if (streq(e->name, "org.freedesktop.DBus.Error.ObjectPathInUse"))
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return EBUSY;
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return EIO;
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}
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static int bus_error_set_strerror_or_const(sd_bus_error *e, const char *name, int error, const char *fallback) {
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size_t k = 64;
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char *n = NULL, *m = NULL;
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if (error < 0)
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error = -error;
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if (!e)
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return -error;
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assert_return(!bus_error_is_dirty(e), -EINVAL);
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assert_return(name, -EINVAL);
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for (;;) {
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char *x;
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m = new(char, k);
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if (!m)
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goto use_fallback;
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errno = 0;
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x = strerror_r(error, m, k);
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if (errno == ERANGE || strlen(x) >= k - 1) {
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free(m);
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k *= 2;
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continue;
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}
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if (!x || errno) {
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free(m);
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goto use_fallback;
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}
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if (x != m) {
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free(m);
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sd_bus_error_set_const(e, name, x);
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return -error;
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}
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break;
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}
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n = strdup(name);
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if (!n) {
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free(m);
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goto use_fallback;
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}
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e->name = n;
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e->message = m;
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e->need_free = true;
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return -error;
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use_fallback:
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sd_bus_error_set_const(e, name, fallback);
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return -error;
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}
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static sd_bus_error map_from_errno(int error) {
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if (error < 0)
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error = -error;
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switch (error) {
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case ENOMEM:
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return SD_BUS_ERROR_MAKE(SD_BUS_ERROR_NO_NETWORK, "Out of memory");
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case EPERM:
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case EACCES:
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return SD_BUS_ERROR_MAKE(SD_BUS_ERROR_ACCESS_DENIED, "Access denied");
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case EINVAL:
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return SD_BUS_ERROR_MAKE(SD_BUS_ERROR_INVALID_ARGS, "Invalid argument");
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case ESRCH:
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return SD_BUS_ERROR_MAKE(SD_BUS_ERROR_UNIX_PROCESS_ID_UNKNOWN, "No such process");
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case ENOENT:
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return SD_BUS_ERROR_MAKE(SD_BUS_ERROR_FILE_NOT_FOUND, "File not found");
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case EEXIST:
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return SD_BUS_ERROR_MAKE(SD_BUS_ERROR_FILE_EXISTS, "File exists");
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case ETIMEDOUT:
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case ETIME:
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return SD_BUS_ERROR_MAKE(SD_BUS_ERROR_TIMEOUT, "Timed out");
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case EIO:
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return SD_BUS_ERROR_MAKE(SD_BUS_ERROR_IO_ERROR, "Input/output error");
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case ENETRESET:
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case ECONNABORTED:
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case ECONNRESET:
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return SD_BUS_ERROR_MAKE(SD_BUS_ERROR_DISCONNECTED, "Disconnected");
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case ENOTSUP:
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return SD_BUS_ERROR_MAKE(SD_BUS_ERROR_NOT_SUPPORTED, "Not supported");
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case EADDRNOTAVAIL:
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return SD_BUS_ERROR_MAKE(SD_BUS_ERROR_BAD_ADDRESS, "Address not available");
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case ENOBUFS:
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return SD_BUS_ERROR_MAKE(SD_BUS_ERROR_LIMITS_EXCEEDED, "Limits exceeded");
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case EADDRINUSE:
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return SD_BUS_ERROR_MAKE(SD_BUS_ERROR_ADDRESS_IN_USE, "Address in use");
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case EBADMSG:
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return SD_BUS_ERROR_MAKE(SD_BUS_ERROR_INCONSISTENT_MESSAGE, "Inconsistent message");
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}
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return SD_BUS_ERROR_MAKE(SD_BUS_ERROR_FAILED, "Operation failed");
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}
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_public_ int sd_bus_error_set_errno(sd_bus_error *e, int error) {
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sd_bus_error x;
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x = map_from_errno(error);
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return bus_error_set_strerror_or_const(e, x.name, error, x.message);
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}
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int bus_error_set_errnofv(sd_bus_error *e, int error, const char *format, va_list ap) {
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sd_bus_error x;
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int r;
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if (error < 0)
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error = -error;
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if (!e)
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return 0;
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assert_return(!bus_error_is_dirty(e), -EINVAL);
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x = map_from_errno(error);
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if (format) {
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char *n, *m;
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r = vasprintf(&m, format, ap);
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if (r < 0)
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goto fallback;
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n = strdup(x.name);
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if (!n) {
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free(m);
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goto fallback;
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}
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e->name = n;
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e->message = m;
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e->need_free = true;
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return -error;
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}
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fallback:
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return bus_error_set_strerror_or_const(e, x.name, error, x.message);
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}
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_public_ int sd_bus_error_set_errnof(sd_bus_error *e, int error, const char *format, ...) {
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int r;
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if (!e)
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return 0;
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assert_return(!bus_error_is_dirty(e), -EINVAL);
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if (format) {
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va_list ap;
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va_start(ap, format);
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r = bus_error_set_errnofv(e, error, format, ap);
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va_end(ap);
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return r;
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}
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return sd_bus_error_set_errno(e, error);
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}
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const char *bus_error_message(const sd_bus_error *e, int error) {
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if (e) {
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/* Sometimes the D-Bus server is a little bit too verbose with
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* its error messages, so let's override them here */
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if (sd_bus_error_has_name(e, SD_BUS_ERROR_ACCESS_DENIED))
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return "Access denied";
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if (e->message)
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return e->message;
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}
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if (error < 0)
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error = -error;
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return strerror(error);
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}
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