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authorLennart Poettering <lennart@poettering.net>2013-11-22 04:01:46 +0100
committerLennart Poettering <lennart@poettering.net>2013-11-22 04:23:22 +0100
commit780896a4f1ec7e36c8f72c866ba9693d790f9741 (patch)
tree7aa9cf31a9ce94c729758b555433283056df3f39 /src/shared
parent6414b7c981378a6eef480f6806d7cbfc98ca22a1 (diff)
bus: rework sd_bus_error APIs
All calls that set a sd_bus_error structure will now return the same error converted to a negative errno. This may be used as syntactic sugar to return from a function and setting a bus_error structure in one go. Also, translate all Linux Exyz (EIO, EINVAL, EUCLEAN, EPIPE, ...) automatically into counterparts in the (new) "Posix.Error." namespace. If we fail to allocate memory for the components of a sd_bus_error automatically reset it to an OOM error which we always can write.
Diffstat (limited to 'src/shared')
-rw-r--r--src/shared/.gitignore4
-rw-r--r--src/shared/errno-list.c59
-rw-r--r--src/shared/errno-list.h27
3 files changed, 90 insertions, 0 deletions
diff --git a/src/shared/.gitignore b/src/shared/.gitignore
new file mode 100644
index 0000000000..c9b5f81719
--- /dev/null
+++ b/src/shared/.gitignore
@@ -0,0 +1,4 @@
+/errno-from-name.gperf
+/errno-from-name.h
+/errno-list.txt
+/errno-to-name.h
diff --git a/src/shared/errno-list.c b/src/shared/errno-list.c
new file mode 100644
index 0000000000..c63296f292
--- /dev/null
+++ b/src/shared/errno-list.c
@@ -0,0 +1,59 @@
+/*-*- 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 <string.h>
+
+#include "util.h"
+#include "errno-list.h"
+
+static const struct errno_name* lookup_errno(register const char *str,
+ register unsigned int len);
+
+#include "errno-to-name.h"
+#include "errno-from-name.h"
+
+const char *errno_to_name(int id) {
+
+ if (id < 0)
+ id = -id;
+
+ if (id >= (int) ELEMENTSOF(errno_names))
+ return NULL;
+
+ return errno_names[id];
+}
+
+int errno_from_name(const char *name) {
+ const struct errno_name *sc;
+
+ assert(name);
+
+ sc = lookup_errno(name, strlen(name));
+ if (!sc)
+ return 0;
+
+ return sc->id;
+}
+
+int errno_max(void) {
+ return ELEMENTSOF(errno_names);
+}
diff --git a/src/shared/errno-list.h b/src/shared/errno-list.h
new file mode 100644
index 0000000000..ba533294e6
--- /dev/null
+++ b/src/shared/errno-list.h
@@ -0,0 +1,27 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+#pragma once
+
+/***
+ 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/>.
+***/
+
+const char *errno_to_name(int id);
+int errno_from_name(const char *name);
+
+int errno_max(void);