Sorry for forgetting attach the C file.
Best Regards,
Li Cheng
At 2015-06-10 20:35:11, eshar...@163.com wrote:
Hi, All,
According to the DBus protocol,
http://dbus.freedesktop.org/doc/dbus-specification.html
" An example argument path match is arg0path='/aa/bb/'. This would match
messages with first arguments of '/', '/aa/', '/aa/bb/', '/aa/bb/cc/' and
'/aa/bb/cc'. It would not match messages with first arguments of '/aa/b', '/aa'
or even '/aa/bb'. "
Then I did a simple test using the attached test-bus-kernel-bloom.c ,
and I found that if I used arg0path='/p1/p2/' , the callback function
couldn't run when I sent emit signal with '/' , '/p1/' , '/p1/p2/p3'.
I traced into the codes , and modified bloom_add_prefixes() , then I can
watch the signals with '/p1/p2/p3' , and '/p1/p2/' , but still cannot watch the
signals with '/' or '/p1/'.
Any recommendations are appreciated.
Thanks!
Best Regards,
Li Cheng
/*-*- 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 "util.h"
#include "log.h"
#include "sd-bus.h"
#include "bus-kernel.h"
#include "bus-util.h"
static int filter(sd_bus *b, sd_bus_message *m, void *userdata, sd_bus_error
*ret_error) {
log_info("callback enter");
return 0;
}
static void test_one(
const char *path,
const char *interface,
const char *member,
bool as_list,
const char *arg0,
const char *match,
bool good) {
_cleanup_close_ int bus_ref = -1;
_cleanup_free_ char *name = NULL, *bus_name = NULL, *address = NULL;
_cleanup_bus_message_unref_ sd_bus_message *m = NULL;
sd_bus *a, *b;
int r;
assert_se(asprintf(&name, "deine-mutter-%u", (unsigned) getpid()) >= 0);
bus_ref = bus_kernel_create_bus(name, false, &bus_name);
if (bus_ref == -ENOENT)
exit(EXIT_TEST_SKIP);
assert_se(bus_ref >= 0);
address = strappend("kernel:path=", bus_name);
assert_se(address);
r = sd_bus_new(&a);
assert_se(r >= 0);
r = sd_bus_new(&b);
assert_se(r >= 0);
r = sd_bus_set_address(a, address);
assert_se(r >= 0);
r = sd_bus_set_address(b, address);
assert_se(r >= 0);
r = sd_bus_start(a);
assert_se(r >= 0);
r = sd_bus_start(b);
assert_se(r >= 0);
log_info("match: %s",match);
r = sd_bus_add_match(b, NULL, match, filter, NULL);
assert_se(r >= 0);
log_info("signal");
if (as_list)
r = sd_bus_emit_signal(a, path, interface, member, "as", 1,
arg0);
else
r = sd_bus_emit_signal(a, path, interface, member, "s", arg0);
assert_se(r >= 0);
r = sd_bus_process(b, &m);
assert_se(r >= 0 && (good == !!m));
sd_bus_unref(a);
sd_bus_unref(b);
}
int main(int argc, char *argv[]) {
log_set_max_level(LOG_DEBUG);
test_one("/service/a", "service.a.interface",
"com_0yunos_0spms_0uninstall", false, "/p1/p2/",
"type='signal',interface='service.a.interface',path='/service/a',member='com_0yunos_0spms_0uninstall',arg0path='/p1/p2/'",
true);
return 0;
}
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