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authorLennart Poettering <lennart@poettering.net>2013-11-21 19:34:37 +0100
committerLennart Poettering <lennart@poettering.net>2013-11-21 21:12:36 +0100
commitebcf1f97de4f6b1580ae55eb56b1a3939fe6b602 (patch)
treedef5185990acebac842ed8fca253531d88897a4a /src/machine/machine-dbus.c
parent0ccad099d4c08dc5a16c87cdd6eefc05e9d4b670 (diff)
bus: rework message handlers to always take an error argument
Message handler callbacks can be simplified drastically if the dispatcher automatically replies to method calls if errors are returned. Thus: add an sd_bus_error argument to all message handlers. When we dispatch a message handler and it returns negative or a set sd_bus_error we send this as message error back to the client. This means errors returned by handlers by default are given back to clients instead of rippling all the way up to the event loop, which is desirable to make things robust. As a side-effect we can now easily turn the SELinux checks into normal function calls, since the method call dispatcher will generate the right error replies automatically now. Also, make sure we always pass the error structure to all property and method handlers as last argument to follow the usual style of passing variables for return values as last argument.
Diffstat (limited to 'src/machine/machine-dbus.c')
-rw-r--r--src/machine/machine-dbus.c22
1 files changed, 11 insertions, 11 deletions
diff --git a/src/machine/machine-dbus.c b/src/machine/machine-dbus.c
index 8e671edba3..2c7f3a798e 100644
--- a/src/machine/machine-dbus.c
+++ b/src/machine/machine-dbus.c
@@ -32,8 +32,8 @@ static int property_get_id(
const char *interface,
const char *property,
sd_bus_message *reply,
- sd_bus_error *error,
- void *userdata) {
+ void *userdata,
+ sd_bus_error *error) {
Machine *m = userdata;
int r;
@@ -55,8 +55,8 @@ static int property_get_state(
const char *interface,
const char *property,
sd_bus_message *reply,
- sd_bus_error *error,
- void *userdata) {
+ void *userdata,
+ sd_bus_error *error) {
Machine *m = userdata;
const char *state;
@@ -77,7 +77,7 @@ static int property_get_state(
static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_class, machine_class, MachineClass);
-static int method_terminate(sd_bus *bus, sd_bus_message *message, void *userdata) {
+static int method_terminate(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) {
Machine *m = userdata;
int r;
@@ -87,12 +87,12 @@ static int method_terminate(sd_bus *bus, sd_bus_message *message, void *userdata
r = machine_stop(m);
if (r < 0)
- return sd_bus_reply_method_errno(message, r, NULL);
+ return r;
return sd_bus_reply_method_return(message, NULL);
}
-static int method_kill(sd_bus *bus, sd_bus_message *message, void *userdata) {
+static int method_kill(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) {
Machine *m = userdata;
const char *swho;
int32_t signo;
@@ -105,22 +105,22 @@ static int method_kill(sd_bus *bus, sd_bus_message *message, void *userdata) {
r = sd_bus_message_read(message, "si", &swho, &signo);
if (r < 0)
- return sd_bus_reply_method_errno(message, r, NULL);
+ return r;
if (isempty(swho))
who = KILL_ALL;
else {
who = kill_who_from_string(swho);
if (who < 0)
- return sd_bus_reply_method_errorf(message, SD_BUS_ERROR_INVALID_ARGS, "Invalid kill parameter '%s'", swho);
+ return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid kill parameter '%s'", swho);
}
if (signo <= 0 || signo >= _NSIG)
- return sd_bus_reply_method_errorf(message, SD_BUS_ERROR_INVALID_ARGS, "Invalid signal %i", signo);
+ return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid signal %i", signo);
r = machine_kill(m, who, signo);
if (r < 0)
- return sd_bus_reply_method_errno(message, r, NULL);
+ return r;
return sd_bus_reply_method_return(message, NULL);
}