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authorLennart Poettering <lennart@poettering.net>2013-03-19 20:03:16 +0100
committerLennart Poettering <lennart@poettering.net>2013-03-20 23:00:09 +0100
commitde1c301ed165eb4d04a0c9d4babe97912b5233bb (patch)
tree7a83edfde27a959d3ee3abf2cc9c99fc6bc6bb24 /src/libsystemd-bus/bus-error.c
parent76f0199f2ce007c50b5a38f7ff6c51167c3a05a0 (diff)
bus: add basic implementation of a native bus client library
Diffstat (limited to 'src/libsystemd-bus/bus-error.c')
-rw-r--r--src/libsystemd-bus/bus-error.c166
1 files changed, 166 insertions, 0 deletions
diff --git a/src/libsystemd-bus/bus-error.c b/src/libsystemd-bus/bus-error.c
new file mode 100644
index 0000000000..0832022ee9
--- /dev/null
+++ b/src/libsystemd-bus/bus-error.c
@@ -0,0 +1,166 @@
+/*-*- 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 "sd-bus.h"
+#include "bus-error.h"
+
+void sd_bus_error_free(sd_bus_error *e) {
+ if (!e)
+ return;
+
+ if (e->need_free) {
+ free((void*) e->name);
+ free((void*) e->message);
+ }
+
+ e->name = e->message = NULL;
+ e->need_free = false;
+}
+
+int sd_bus_error_set(sd_bus_error *e, const char *name, const char *format, ...) {
+ char *n, *m = NULL;
+ va_list ap;
+ int r;
+
+ if (!e)
+ return 0;
+ if (sd_bus_error_is_set(e))
+ return -EINVAL;
+ if (!name)
+ return -EINVAL;
+
+ n = strdup(name);
+ if (!n)
+ return -ENOMEM;
+
+ if (format) {
+ va_start(ap, format);
+ r = vasprintf(&m, format, ap);
+ va_end(ap);
+
+ if (r < 0) {
+ free(n);
+ return -ENOMEM;
+ }
+ }
+
+ e->name = n;
+ e->message = m;
+ e->need_free = true;
+
+ return 0;
+}
+
+int sd_bus_error_copy(sd_bus_error *dest, const sd_bus_error *e) {
+ if (!dest)
+ return 0;
+ if (sd_bus_error_is_set(dest))
+ return -EINVAL;
+ if (!sd_bus_error_is_set(e))
+ return 0;
+
+ if (e->need_free) {
+ char *x, *y = NULL;
+
+ x = strdup(e->name);
+ if (!x)
+ return -ENOMEM;
+
+ if (e->message) {
+ y = strdup(e->message);
+ if (!y) {
+ free(x);
+ return -ENOMEM;
+ }
+ }
+
+ dest->name = x;
+ dest->message = y;
+ dest->need_free = true;
+ } else
+ *dest = *e;
+
+ return 0;
+}
+
+void sd_bus_error_set_const(sd_bus_error *e, const char *name, const char *message) {
+ if (!e)
+ return;
+ if (sd_bus_error_is_set(e))
+ return;
+
+ e->name = name;
+ e->message = message;
+}
+
+int sd_bus_error_is_set(const sd_bus_error *e) {
+ if (!e)
+ return 0;
+
+ return e->name || e->message || e->need_free;
+}
+
+int sd_bus_error_has_name(const sd_bus_error *e, const char *name) {
+ if (!e)
+ return 0;
+
+ return streq_ptr(e->name, name);
+}
+
+int bus_error_to_errno(const sd_bus_error* e) {
+
+ /* Better replce this with a gperf table */
+
+ if (!e->name)
+ return -EIO;
+
+ if (streq(e->name, "org.freedesktop.DBus.Error.NoMemory"))
+ return -ENOMEM;
+
+ if (streq(e->name, "org.freedesktop.DBus.Error.AuthFailed") ||
+ streq(e->name, "org.freedesktop.DBus.Error.AccessDenied"))
+ return -EPERM;
+
+ return -EIO;
+}
+
+int bus_error_from_errno(sd_bus_error *e, int error) {
+ if (!e)
+ return error;
+
+ if (error == -ENOMEM)
+ sd_bus_error_set_const(e, "org.freedesktop.DBus.Error.NoMemory", strerror(-error));
+ else if (error == -EPERM || error == EACCES)
+ sd_bus_error_set_const(e, "org.freedesktop.DBus.Error.AccessDenied", strerror(-error));
+ else
+ sd_bus_error_set_const(e, "org.freedesktop.DBus.Error.Failed", "Operation failed");
+
+ return error;
+}