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bus: hook up client with socket communication

This commit is contained in:
Lennart Poettering 2013-03-20 22:56:25 +01:00
parent fbfa72b0a1
commit 89ffcd2ad5
11 changed files with 615 additions and 152 deletions
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2
.gitignore vendored
View File

@ -4,6 +4,7 @@
/ata_id
/bootctl
/build-aux
/busctl
/cdrom_id
/collect
/gtk-doc.make
@ -82,6 +83,7 @@
/tags
/test-bus-marshal
/test-bus-signature
/test-bus-chat
/test-calendarspec
/test-catalog
/test-cgroup

28
Makefile.am
View File

@ -1654,12 +1654,19 @@ libsystemd_bus_la_SOURCES = \
src/libsystemd-bus/bus-type.c \
src/libsystemd-bus/bus-type.h
libsystemd_bus_la_LIBADD = \
libsystemd-id128-internal.la
noinst_LTLIBRARIES += \
libsystemd-bus.la
noinst_tests += \
test-bus-marshal \
test-bus-signature
test-bus-signature \
test-bus-chat
noinst_PROGRAMS += \
busctl
test_bus_marshal_SOURCES = \
src/libsystemd-bus/test-bus-marshal.c
@ -1682,6 +1689,25 @@ test_bus_signature_LDADD = \
libsystemd-shared.la \
libsystemd-bus.la
test_bus_chat_SOURCES = \
src/libsystemd-bus/test-bus-chat.c
test_bus_chat_CFLAGS = \
$(AM_CFLAGS) \
-pthread
test_bus_chat_LDADD = \
libsystemd-shared.la \
libsystemd-bus.la \
libsystemd-id128-internal.la
busctl_SOURCES = \
src/libsystemd-bus/busctl.c
busctl_LDADD = \
libsystemd-shared.la \
libsystemd-bus.la
# ------------------------------------------------------------------------------
if ENABLE_GTK_DOC
SUBDIRS += \

36
src/libsystemd-bus/bus-control.c
View File

@ -107,7 +107,6 @@ int sd_bus_release_name(sd_bus *bus, const char *name) {
int sd_bus_list_names(sd_bus *bus, char ***l) {
_cleanup_bus_message_unref_ sd_bus_message *m1 = NULL, *reply1 = NULL, *m2 = NULL, *reply2 = NULL;
_cleanup_strv_free_ char **a = NULL, **b = NULL;
char **x = NULL;
int r;
@ -144,17 +143,17 @@ int sd_bus_list_names(sd_bus *bus, char ***l) {
if (r < 0)
return r;
r = sd_bus_message_read(reply1, "as", &a);
if (r < 0)
r = bus_message_read_strv_extend(reply1, &x);
if (r < 0) {
strv_free(x);
return r;
}
r = sd_bus_message_read(reply2, "as", &b);
if (r < 0)
r = bus_message_read_strv_extend(reply2, &x);
if (r < 0) {
strv_free(x);
return r;
x = strv_merge(a, b);
if (!x)
return -ENOMEM;
}
*l = strv_uniq(x);
return 0;
@ -162,6 +161,7 @@ int sd_bus_list_names(sd_bus *bus, char ***l) {
int sd_bus_get_owner(sd_bus *bus, const char *name, char **owner) {
_cleanup_bus_message_unref_ sd_bus_message *m = NULL, *reply = NULL;
const char *found;
int r;
if (!bus)
@ -187,7 +187,21 @@ int sd_bus_get_owner(sd_bus *bus, const char *name, char **owner) {
if (r < 0)
return r;
return sd_bus_message_read(reply, "s", owner);
r = sd_bus_message_read(reply, "s", &found);
if (r < 0)
return r;
if (owner) {
char *t;
t = strdup(found);
if (!t)
return -ENOMEM;
*owner = t;
}
return 0;
}
int sd_bus_get_owner_uid(sd_bus *bus, const char *name, uid_t *uid) {
@ -245,7 +259,7 @@ int sd_bus_get_owner_pid(sd_bus *bus, const char *name, pid_t *pid) {
"org.freedesktop.DBus",
"/",
"org.freedesktop.DBus",
"GetConnectionUnixUser",
"GetConnectionUnixProcessID",
&m);
if (r < 0)
return r;

30
src/libsystemd-bus/bus-error.c
View File

@ -86,6 +86,8 @@ int sd_bus_error_set(sd_bus_error *e, const char *name, const char *format, ...)
}
int sd_bus_error_copy(sd_bus_error *dest, const sd_bus_error *e) {
char *x, *y = NULL;
if (!dest)
return 0;
if (bus_error_is_dirty(dest))
@ -93,27 +95,21 @@ int sd_bus_error_copy(sd_bus_error *dest, const sd_bus_error *e) {
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;
x = strdup(e->name);
if (!x)
if (e->message) {
y = strdup(e->message);
if (!y) {
free(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;
dest->name = x;
dest->message = y;
dest->need_free = true;
return 0;
}

11
src/libsystemd-bus/bus-internal.h
View File

@ -50,8 +50,7 @@ enum bus_state {
BUS_OPENING,
BUS_AUTHENTICATING,
BUS_HELLO,
BUS_RUNNING,
BUS_CLOSED
BUS_RUNNING
};
struct sd_bus {
@ -60,7 +59,7 @@ struct sd_bus {
int fd;
int message_version;
bool can_fds:1;
bool send_hello:1;
bool sent_hello:1;
void *rbuffer;
size_t rbuffer_size;
@ -99,3 +98,9 @@ struct sd_bus {
size_t auth_size;
char *auth_uid;
};
static inline void bus_unrefp(sd_bus **b) {
sd_bus_unref(*b);
}
#define _cleanup_bus_unref_ __attribute__((cleanup(bus_unrefp)))

42
src/libsystemd-bus/bus-message.c
View File

@ -23,6 +23,7 @@
#include "util.h"
#include "utf8.h"
#include "strv.h"
#include "sd-bus.h"
#include "bus-message.h"
@ -322,6 +323,8 @@ int sd_bus_message_new_signal(
if (!t)
return -ENOMEM;
t->header->flags |= SD_BUS_MESSAGE_NO_REPLY_EXPECTED;
r = message_append_field_string(t, SD_BUS_MESSAGE_HEADER_PATH, SD_BUS_TYPE_OBJECT_PATH, path, &t->path);
if (r < 0)
goto fail;
@ -409,6 +412,7 @@ static int message_new_reply(
if (!t)
return -ENOMEM;
t->header->flags |= SD_BUS_MESSAGE_NO_REPLY_EXPECTED;
t->reply_serial = BUS_MESSAGE_SERIAL(call);
r = message_append_field_uint32(t, SD_BUS_MESSAGE_HEADER_REPLY_SERIAL, t->reply_serial);
@ -424,6 +428,7 @@ static int message_new_reply(
t->dont_send = !!(call->header->flags & SD_BUS_MESSAGE_NO_REPLY_EXPECTED);
*m = t;
return 0;
fail:
message_free(t);
@ -1891,7 +1896,7 @@ eof:
return 0;
}
int sd_bus_message_rewind(sd_bus_message *m, bool complete) {
int sd_bus_message_rewind(sd_bus_message *m, int complete) {
struct bus_container *c;
if (!m)
@ -2424,6 +2429,10 @@ static int message_parse_fields(sd_bus_message *m) {
break;
}
/* Try to read the error message, but if we can't it's a non-issue */
if (m->header->type == SD_BUS_MESSAGE_TYPE_METHOD_ERROR)
sd_bus_message_read(m, "s", &m->error.message);
return 0;
}
@ -2724,3 +2733,34 @@ int bus_message_get_blob(sd_bus_message *m, void **buffer, size_t *sz) {
return 0;
}
int bus_message_read_strv_extend(sd_bus_message *m, char ***l) {
int r;
assert(m);
assert(l);
r = sd_bus_message_enter_container(m, 'a', "s");
if (r < 0)
return r;
for (;;) {
const char *s;
r = sd_bus_message_read_basic(m, 's', &s);
if (r < 0)
return r;
if (r == 0)
break;
r = strv_extend(l, s);
if (r < 0)
return r;
}
r = sd_bus_message_exit_container(m);
if (r < 0)
return r;
return 0;
}

2
src/libsystemd-bus/bus-message.h
View File

@ -123,8 +123,8 @@ static inline void bus_message_unrefp(sd_bus_message **m) {
#define _cleanup_bus_message_unref_ __attribute__((cleanup(bus_message_unrefp)))
int bus_message_parse(sd_bus_message *m);
int bus_message_seal(sd_bus_message *m, uint64_t serial);
int bus_message_dump(sd_bus_message *m);
int bus_message_get_blob(sd_bus_message *m, void **buffer, size_t *sz);
int bus_message_from_malloc(void *buffer, size_t length, sd_bus_message **ret);
int bus_message_read_strv_extend(sd_bus_message *m, char ***l);

70
src/libsystemd-bus/busctl.c
View File

@ -19,15 +19,22 @@
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
#include "strv.h"
#include "util.h"
#include "log.h"
#include "sd-bus.h"
#include "bus-message.h"
#include "bus-internal.h"
int main(int argc, char *argv[]) {
_cleanup_bus_unref_ sd_bus *bus = NULL;
_cleanup_strv_free_ char **l = NULL;
char **i;
int r;
size_t max_i = 0;
r = bus_open_system(&bus);
r = sd_bus_open_user(&bus);
if (r < 0) {
log_error("Failed to connect to bus: %s", strerror(-r));
goto fail;
@ -39,26 +46,57 @@ int main(int argc, char *argv[]) {
goto fail;
}
strv_sort(l);
STRV_FOREACH(i, l)
max_i = MAX(max_i, strlen(*i));
printf("%-*s %*s %-*s %-*s CONNECTION\n",
(int) max_i, "NAME", 10, "PID", 15, "PROCESS", 16, "USER");
STRV_FOREACH(i, l) {
_cleanup_free_ char *owner = NULL;
pid_t pid = 0;
pid_t pid;
uid_t uid;
bool uid_valid;
/* if ((*i)[0] == ':') */
/* continue; */
printf("%-*s", (int) max_i, *i);
r = sd_bus_get_owner_pid(bus, *i, &pid);
if (r >= 0) {
_cleanup_free_ char *comm = NULL;
printf(" %10lu", (unsigned long) pid);
get_process_comm(pid, &comm);
printf(" %-15s", strna(comm));
} else
printf(" - - ");
r = sd_bus_get_owner_uid(bus, *i, &uid);
if (r >= 0) {
_cleanup_free_ char *u = NULL;
u = uid_to_name(uid);
if (!u) {
log_oom();
goto fail;
}
if (strlen(u) > 16)
u[16] = 0;
printf(" %-16s", u);
} else
printf(" - ");
r = sd_bus_get_owner(bus, *i, &owner);
if (r == -ENXIO)
continue;
r = sd_get_owner_pid(bus, *i, &pid);
if (r == -ENXIO)
continue;
r = sd_get_owner_uid(bus, *i, &pid);
if (r == -ENXIO)
continue;
uid_valid = r >= 0;
printf("%s (%s) %llu %llu\n", *i, owner, (unsigned long long) pid, (unsigned long long) uid);
if (r >= 0)
printf(" %s\n", owner);
else
printf(" -\n");
}
r = 0;

293
src/libsystemd-bus/sd-bus.c
View File

@ -39,6 +39,7 @@
static void bus_free(sd_bus *b) {
struct filter_callback *f;
unsigned i;
assert(b);
@ -46,9 +47,17 @@ static void bus_free(sd_bus *b) {
close_nointr_nofail(b->fd);
free(b->rbuffer);
free(b->rqueue);
free(b->wqueue);
free(b->unique_name);
free(b->auth_uid);
free(b->address);
for (i = 0; i < b->rqueue_size; i++)
sd_bus_message_unref(b->rqueue[i]);
free(b->rqueue);
for (i = 0; i < b->wqueue_size; i++)
sd_bus_message_unref(b->wqueue[i]);
free(b->wqueue);
hashmap_free_free(b->reply_callbacks);
@ -122,24 +131,19 @@ static int bus_send_hello(sd_bus *bus) {
if (r < 0)
return r;
return 0;
bus->sent_hello = true;
return r;
}
static int bus_start_running(sd_bus *bus) {
int r;
assert(bus);
if (bus->send_hello) {
if (bus->sent_hello) {
bus->state = BUS_HELLO;
r = bus_send_hello(bus);
if (r < 0)
return r;
return 0;
}
bus->state = BUS_RUNNING;
return 0;
}
@ -154,7 +158,7 @@ static int parse_address_key(const char **p, const char *key, char **value) {
assert(value);
l = strlen(key);
if (!strncmp(*p, key, l) != 0)
if (strncmp(*p, key, l) != 0)
return 0;
if ((*p)[l] != '=')
@ -164,7 +168,7 @@ static int parse_address_key(const char **p, const char *key, char **value) {
return -EINVAL;
a = *p + l + 1;
while (*a != ';' && *a != 0) {
while (*a != ',' && *a != 0) {
char c, *t;
if (*a == '%') {
@ -182,12 +186,14 @@ static int parse_address_key(const char **p, const char *key, char **value) {
return y;
}
a += 3;
c = (char) ((x << 4) | y);
} else
a += 3;
} else {
c = *a;
a++;
}
t = realloc(r, n + 1);
t = realloc(r, n + 2);
if (!t) {
free(r);
return -ENOMEM;
@ -197,6 +203,16 @@ static int parse_address_key(const char **p, const char *key, char **value) {
r[n++] = c;
}
if (!r) {
r = strdup("");
if (!r)
return -ENOMEM;
} else
r[n] = 0;
if (*a == ',')
a++;
*p = a;
*value = r;
return 1;
@ -206,7 +222,10 @@ static void skip_address_key(const char **p) {
assert(p);
assert(*p);
*p += strcspn(*p, ";");
*p += strcspn(*p, ",");
if (**p == ',')
(*p) ++;
}
static int bus_parse_next_address(sd_bus *b) {
@ -231,7 +250,7 @@ static int bus_parse_next_address(sd_bus *b) {
_cleanup_free_ char *path = NULL, *abstract = NULL;
p = a + 5;
while (*p != 0 && *p != ';') {
while (*p != 0) {
r = parse_address_key(&p, "guid", &guid);
if (r < 0)
return r;
@ -272,13 +291,13 @@ static int bus_parse_next_address(sd_bus *b) {
} else if (abstract) {
size_t l;
l = strlen(path);
l = strlen(abstract);
if (l > sizeof(b->sockaddr.un.sun_path) - 1)
return -E2BIG;
b->sockaddr.un.sun_family = AF_UNIX;
b->sockaddr.un.sun_path[0] = 0;
strncpy(b->sockaddr.un.sun_path+1, path, sizeof(b->sockaddr.un.sun_path)-1);
strncpy(b->sockaddr.un.sun_path+1, abstract, sizeof(b->sockaddr.un.sun_path)-1);
b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + 1 + l;
}
@ -287,7 +306,7 @@ static int bus_parse_next_address(sd_bus *b) {
struct addrinfo hints, *result;
p = a + 4;
while (*p != 0 && *p != ';') {
while (*p != 0) {
r = parse_address_key(&p, "guid", &guid);
if (r < 0)
return r;
@ -409,7 +428,7 @@ static int bus_auth_verify(sd_bus *b) {
if (!e)
return 0;
f = memmem(e, b->rbuffer_size - (e - (char*) b->rbuffer), "\r\n", 2);
f = memmem(e + 2, b->rbuffer_size - (e - (char*) b->rbuffer) - 2, "\r\n", 2);
if (!f)
return 0;
@ -423,7 +442,7 @@ static int bus_auth_verify(sd_bus *b) {
int x, y;
x = unhexchar(((char*) b->rbuffer)[3 + i]);
y = unhexchar(((char*) b->rbuffer)[3 + i + 2]);
y = unhexchar(((char*) b->rbuffer)[3 + i + 1]);
if (x < 0 || y < 0)
return -EINVAL;
@ -446,6 +465,8 @@ static int bus_auth_verify(sd_bus *b) {
memmove(b->rbuffer, f + 2, b->rbuffer_size);
}
b->rbuffer_size = 0;
r = bus_start_running(b);
if (r < 0)
return r;
@ -459,6 +480,7 @@ static int bus_read_auth(sd_bus *b) {
size_t n;
ssize_t k;
int r;
void *p;
assert(b);
@ -467,6 +489,11 @@ static int bus_read_auth(sd_bus *b) {
return r;
n = MAX(3 + 32 + 2 + sizeof("AGREE_UNIX_FD") - 1 + 2, b->rbuffer_size * 2);
p = realloc(b->rbuffer, n);
if (!p)
return -ENOMEM;
b->rbuffer = p;
zero(iov);
iov.iov_base = (uint8_t*) b->rbuffer + b->rbuffer_size;
@ -490,7 +517,7 @@ static int bus_read_auth(sd_bus *b) {
}
static int bus_start_auth(sd_bus *b) {
static const char auth_prefix[] = "\0AUTH_EXTERNAL ";
static const char auth_prefix[] = "\0AUTH EXTERNAL ";
static const char auth_suffix[] = "\r\nNEGOTIATE_UNIX_FD\r\nBEGIN\r\n";
char text[20 + 1]; /* enough space for a 64bit integer plus NUL */
@ -570,25 +597,25 @@ int sd_bus_open_system(sd_bus **ret) {
r = sd_bus_open_address(e, &b);
if (r < 0)
return r;
} else {
b = bus_new();
if (!b)
return -ENOMEM;
b->send_hello = true;
*ret = b;
return r;
b->sockaddr.un.sun_family = AF_UNIX;
strncpy(b->sockaddr.un.sun_path, "/run/dbus/system_bus_socket", sizeof(b->sockaddr.un.sun_path));
b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + sizeof("/run/dbus/system_bus_socket") - 1;
r = bus_start_connect(b);
if (r < 0) {
bus_free(b);
return r;
}
}
b = bus_new();
if (!b)
return -ENOMEM;
b->send_hello = true;
b->sockaddr.un.sun_family = AF_UNIX;
strncpy(b->sockaddr.un.sun_path, "/run/dbus/system_bus_socket", sizeof(b->sockaddr.un.sun_path));
b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + sizeof("/run/dbus/system_bus_socket") - 1;
r = bus_start_connect(b);
r = bus_send_hello(b);
if (r < 0) {
bus_free(b);
sd_bus_unref(b);
return r;
}
@ -610,33 +637,33 @@ int sd_bus_open_user(sd_bus **ret) {
r = sd_bus_open_address(e, &b);
if (r < 0)
return r;
} else {
e = getenv("XDG_RUNTIME_DIR");
if (!e)
return -ENOENT;
b->send_hello = true;
*ret = b;
return r;
l = strlen(e);
if (l + 4 > sizeof(b->sockaddr.un.sun_path))
return -E2BIG;
b = bus_new();
if (!b)
return -ENOMEM;
b->sockaddr.un.sun_family = AF_UNIX;
memcpy(mempcpy(b->sockaddr.un.sun_path, e, l), "/bus", 4);
b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + l + 4;
r = bus_start_connect(b);
if (r < 0) {
bus_free(b);
return r;
}
}
e = getenv("XDG_RUNTIME_DIR");
if (!e)
return -ENOENT;
l = strlen(e);
if (l + 4 > sizeof(b->sockaddr.un.sun_path))
return -E2BIG;
b = bus_new();
if (!b)
return -ENOMEM;
b->send_hello = true;
b->sockaddr.un.sun_family = AF_UNIX;
memcpy(mempcpy(b->sockaddr.un.sun_path, e, l), "/bus", 4);
b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + l + 4;
r = bus_start_connect(b);
r = bus_send_hello(b);
if (r < 0) {
bus_free(b);
sd_bus_unref(b);
return r;
}
@ -747,6 +774,8 @@ int sd_bus_can_send(sd_bus *bus, char type) {
if (!bus)
return -EINVAL;
if (bus->state != BUS_RUNNING && bus->state != BUS_HELLO)
return -EAGAIN;
if (type == SD_BUS_TYPE_UNIX_FD)
return bus->can_fds;
@ -757,6 +786,9 @@ int sd_bus_can_send(sd_bus *bus, char type) {
static int bus_seal_message(sd_bus *b, sd_bus_message *m) {
assert(m);
if (m->header->version > b->message_version)
return -EPERM;
if (m->sealed)
return 0;
@ -773,6 +805,7 @@ static int message_write(sd_bus *bus, sd_bus_message *m, size_t *idx) {
assert(bus);
assert(m);
assert(idx);
assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO);
n = m->n_iovec * sizeof(struct iovec);
iov = alloca(n);
@ -792,7 +825,7 @@ static int message_write(sd_bus *bus, sd_bus_message *m, size_t *idx) {
*idx += (size_t) k;
iovec_advance(iov, &j, *idx);
return j > m->n_iovec;
return j >= m->n_iovec;
}
static int message_read_need(sd_bus *bus, size_t *need) {
@ -801,8 +834,9 @@ static int message_read_need(sd_bus *bus, size_t *need) {
assert(bus);
assert(need);
assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO);
if (bus->rbuffer_size <= sizeof(struct bus_header)) {
if (bus->rbuffer_size < sizeof(struct bus_header)) {
*need = sizeof(struct bus_header);
return 0;
}
@ -818,9 +852,9 @@ static int message_read_need(sd_bus *bus, size_t *need) {
a = be32toh(a);
b = be32toh(b);
} else
return -EIO;
return -EBADMSG;
*need = sizeof(struct bus_header) + ALIGN_TO(a, 8) + b;
*need = sizeof(struct bus_header) + ALIGN_TO(b, 8) + a;
return 0;
}
@ -832,6 +866,7 @@ static int message_make(sd_bus *bus, size_t size, sd_bus_message **m) {
assert(bus);
assert(m);
assert(bus->rbuffer_size >= size);
assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO);
if (bus->rbuffer_size > size) {
b = memdup((const uint8_t*) bus->rbuffer + size, bus->rbuffer_size - size);
@ -850,12 +885,6 @@ static int message_make(sd_bus *bus, size_t size, sd_bus_message **m) {
bus->rbuffer = b;
bus->rbuffer_size -= size;
r = bus_message_parse(t);
if (r < 0) {
sd_bus_message_unref(t);
return r;
}
*m = t;
return 1;
}
@ -870,6 +899,7 @@ static int message_read(sd_bus *bus, sd_bus_message **m) {
assert(bus);
assert(m);
assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO);
r = message_read_need(bus, &need);
if (r < 0)
@ -882,6 +912,8 @@ static int message_read(sd_bus *bus, sd_bus_message **m) {
if (!b)
return -ENOMEM;
bus->rbuffer = b;
zero(iov);
iov.iov_base = (uint8_t*) bus->rbuffer + bus->rbuffer_size;
iov.iov_len = need - bus->rbuffer_size;
@ -910,6 +942,7 @@ static int dispatch_wqueue(sd_bus *bus) {
int r, c = 0;
assert(bus);
assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO);
if (bus->fd < 0)
return -ENOTCONN;
@ -951,6 +984,7 @@ static int dispatch_rqueue(sd_bus *bus, sd_bus_message **m) {
assert(bus);
assert(m);
assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO);
if (bus->fd < 0)
return -ENOTCONN;
@ -983,8 +1017,6 @@ int sd_bus_send(sd_bus *bus, sd_bus_message *m, uint64_t *serial) {
return -ENOTCONN;
if (!m)
return -EINVAL;
if (m->header->version > bus->message_version)
return -EPERM;
r = bus_seal_message(bus, m);
if (r < 0)
@ -995,7 +1027,7 @@ int sd_bus_send(sd_bus *bus, sd_bus_message *m, uint64_t *serial) {
if (m->dont_send && !serial)
return 0;
if (bus->wqueue_size <= 0) {
if ((bus->state == BUS_RUNNING || bus->state == BUS_HELLO) && bus->wqueue_size <= 0) {
size_t idx = 0;
r = message_write(bus, m, &idx);
@ -1057,14 +1089,20 @@ int sd_bus_send_with_reply(
if (!bus)
return -EINVAL;
if (!bus->fd < 0)
if (bus->fd < 0)
return -ENOTCONN;
if (!m)
return -EINVAL;
if (!callback)
return -EINVAL;
if (!m->header->type != SD_BUS_MESSAGE_TYPE_METHOD_CALL)
if (m->header->type != SD_BUS_MESSAGE_TYPE_METHOD_CALL)
return -EINVAL;
if (m->header->flags & SD_BUS_MESSAGE_NO_REPLY_EXPECTED)
return -EINVAL;
r = hashmap_ensure_allocated(&bus->reply_callbacks, uint64_hash_func, uint64_compare_func);
if (r < 0)
return r;
r = bus_seal_message(bus, m);
if (r < 0)
@ -1111,6 +1149,30 @@ int sd_bus_send_with_reply_cancel(sd_bus *bus, uint64_t serial) {
return 1;
}
static int ensure_running(sd_bus *bus) {
int r;
assert(bus);
r = sd_bus_is_running(bus);
if (r != 0)
return r;
for (;;) {
r = sd_bus_process(bus, NULL);
if (r < 0)
return r;
r = sd_bus_is_running(bus);
if (r != 0)
return r;
r = sd_bus_wait(bus, (uint64_t) -1);
if (r < 0)
return r;
}
}
int sd_bus_send_with_reply_and_block(
sd_bus *bus,
sd_bus_message *m,
@ -1125,14 +1187,20 @@ int sd_bus_send_with_reply_and_block(
if (!bus)
return -EINVAL;
if (!bus->fd < 0)
if (bus->fd < 0)
return -ENOTCONN;
if (!m)
return -EINVAL;
if (!m->header->type != SD_BUS_MESSAGE_TYPE_METHOD_CALL)
if (m->header->type != SD_BUS_MESSAGE_TYPE_METHOD_CALL)
return -EINVAL;
if (sd_bus_error_is_dirty(error))
if (m->header->flags & SD_BUS_MESSAGE_NO_REPLY_EXPECTED)
return -EINVAL;
if (bus_error_is_dirty(error))
return -EINVAL;
r = ensure_running(bus);
if (r < 0)
return r;
r = sd_bus_send(bus, m, &serial);
if (r < 0)
@ -1162,6 +1230,9 @@ int sd_bus_send_with_reply_and_block(
if (r < 0)
return r;
if (r > 0) {
/* bus_message_dump(incoming); */
/* sd_bus_message_rewind(incoming, true); */
if (incoming->reply_serial == serial) {
/* Found a match! */
@ -1223,7 +1294,7 @@ int sd_bus_get_fd(sd_bus *bus) {
return -EINVAL;
if (bus->fd < 0)
return -EINVAL;
return -ENOTCONN;
return bus->fd;
}
@ -1233,13 +1304,19 @@ int sd_bus_get_events(sd_bus *bus) {
if (!bus)
return -EINVAL;
if (bus->fd < 0)
return -EINVAL;
return -ENOTCONN;
if (bus->state == BUS_OPENING)
flags |= POLLOUT;
else if (bus->state == BUS_RUNNING || bus->state == BUS_HELLO) {
else if (bus->state == BUS_AUTHENTICATING) {
if (bus->auth_index < ELEMENTSOF(bus->auth_iovec))
flags |= POLLOUT;
flags |= POLLIN;
} else if (bus->state == BUS_RUNNING || bus->state == BUS_HELLO) {
if (bus->rqueue_size <= 0)
flags |= POLLIN;
if (bus->wqueue_size > 0)
@ -1250,7 +1327,6 @@ int sd_bus_get_events(sd_bus *bus) {
}
int sd_bus_process(sd_bus *bus, sd_bus_message **ret) {
sd_bus_message *m;
int r;
if (!bus)
@ -1270,7 +1346,7 @@ int sd_bus_process(sd_bus *bus, sd_bus_message **ret) {
return -errno;
if (p.revents & (POLLOUT|POLLERR|POLLHUP)) {
int error;
int error = 0;
socklen_t slen = sizeof(error);
r = getsockopt(bus->fd, SOL_SOCKET, SO_ERROR, &error, &slen);
@ -1297,13 +1373,14 @@ int sd_bus_process(sd_bus *bus, sd_bus_message **ret) {
return r;
r = bus_read_auth(bus);
if (r <= 0)
if (r < 0)
return r;
return bus_start_running(bus);
return 0;
} else if (bus->state == BUS_RUNNING || bus->state == BUS_HELLO) {
struct filter_callback *l;
_cleanup_bus_message_unref_ sd_bus_message *m = NULL;
r = dispatch_wqueue(bus);
if (r < 0)
@ -1321,31 +1398,40 @@ int sd_bus_process(sd_bus *bus, sd_bus_message **ret) {
r = c->callback(bus, m, c->userdata);
free(c);
if (r != 0) {
sd_bus_message_unref(m);
if (r != 0)
return r < 0 ? r : 0;
}
}
}
LIST_FOREACH(callbacks, l, bus->filter_callbacks) {
r = l->callback(bus, m, l->userdata);
if (r != 0) {
sd_bus_message_unref(m);
if (r != 0)
return r < 0 ? r : 0;
}
}
if (ret) {
*ret = m;
m = NULL;
return 1;
}
sd_bus_message_unref(m);
if (sd_bus_message_is_method_call(m, NULL, NULL)) {
const sd_bus_error e = SD_BUS_ERROR_INIT_CONST("org.freedesktop.DBus.Error.UnknownObject", "Unknown object.");
_cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
r = sd_bus_message_new_method_error(bus, m, &e, &reply);
if (r < 0)
return r;
r = sd_bus_send(bus, reply, NULL);
if (r < 0)
return r;
}
return 0;
}
return -ENOTSUP;
assert_not_reached("Unknown state");
}
int sd_bus_wait(sd_bus *bus, uint64_t timeout_usec) {
@ -1356,7 +1442,10 @@ int sd_bus_wait(sd_bus *bus, uint64_t timeout_usec) {
if (!bus)
return -EINVAL;
if (bus->fd < 0)
return -ECONNREFUSED;
return -ENOTCONN;
if (bus->rqueue_size > 0)
return 0;
e = sd_bus_get_events(bus);
if (e < 0)
@ -1368,7 +1457,7 @@ int sd_bus_wait(sd_bus *bus, uint64_t timeout_usec) {
r = ppoll(&p, 1, timeout_usec == (uint64_t) -1 ? NULL : timespec_store(&ts, timeout_usec), NULL);
if (r < 0)
return -EINVAL;
return -errno;
return r;
}
@ -1381,7 +1470,11 @@ int sd_bus_flush(sd_bus *bus) {
if (bus->fd < 0)
return -ENOTCONN;
if (bus->state == BUS_RUNNING && bus->wqueue_size <= 0)
r = ensure_running(bus);
if (r < 0)
return r;
if (bus->wqueue_size <= 0)
return 0;
for (;;) {
@ -1389,7 +1482,7 @@ int sd_bus_flush(sd_bus *bus) {
if (r < 0)
return r;
if (bus->state == BUS_RUNNING && bus->wqueue_size <= 0)
if (bus->wqueue_size <= 0)
return 0;
r = sd_bus_wait(bus, (uint64_t) -1);

11
src/libsystemd-bus/sd-bus.h
View File

@ -32,6 +32,12 @@
* - make unix fd passing work
* - add page donation logic
* - api for appending/reading fixed arrays
* - always verify container depth
* - implement method timeout logic
* - implicitly set no_reply when a message-call is sent an the serial number ignored
* - reduce number of ppoll()s if we can avoid it
* - handle NULL strings nicer when appending
* - merge busctl into systemctl or so?
*/
typedef struct sd_bus sd_bus;
@ -117,7 +123,7 @@ int sd_bus_message_read_basic(sd_bus_message *m, char type, void *p);
int sd_bus_message_enter_container(sd_bus_message *m, char type, const char *contents);
int sd_bus_message_exit_container(sd_bus_message *m);
int sd_bus_message_peek_type(sd_bus_message *m, char *type, const char **contents);
int sd_bus_message_rewind(sd_bus_message *m, bool complete);
int sd_bus_message_rewind(sd_bus_message *m, int complete);
/* Bus management */
@ -133,7 +139,8 @@ int sd_bus_remove_match(sd_bus *bus, const char *match);
/* Error structures */
#define SD_BUS_ERROR_INIT (NULL, NULL, 0)
#define SD_BUS_ERROR_INIT {NULL, NULL, 0}
#define SD_BUS_ERROR_INIT_CONST(name, message) {(name), (message), 0}
void sd_bus_error_free(sd_bus_error *e);
int sd_bus_error_set(sd_bus_error *e, const char *name, const char *format, ...);

242
src/libsystemd-bus/test-bus-chat.c Normal file
View File

@ -0,0 +1,242 @@
/*-*- 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 <assert.h>
#include <stdlib.h>
#include <pthread.h>
#include "log.h"
#include "util.h"
#include "sd-bus.h"
#include "bus-message.h"
static int server_init(sd_bus **_bus) {
sd_bus *bus = NULL;
int r;
assert(_bus);
r = sd_bus_open_user(&bus);
if (r < 0) {
log_error("Failed to connect to user bus: %s", strerror(-r));
goto fail;
}
r = sd_bus_request_name(bus, "org.freedesktop.systemd.test", 0);
if (r < 0) {
log_error("Failed to acquire name: %s", strerror(-r));
goto fail;
}
*_bus = bus;
return 0;
fail:
if (bus)
sd_bus_unref(bus);
return r;
}
static void* server(void *p) {
sd_bus *bus = p;
int r;
for (;;) {
_cleanup_bus_message_unref_ sd_bus_message *m = NULL, *reply = NULL;
r = sd_bus_process(bus, &m);
if (r < 0) {
log_error("Failed to process requests: %s", strerror(-r));
goto fail;
}
if (r == 0) {
r = sd_bus_wait(bus, (uint64_t) -1);
if (r < 0) {
log_error("Failed to wait: %s", strerror(-r));
goto fail;
}
continue;
}
log_info("Got message! %s", strna(sd_bus_message_get_member(m)));
/* bus_message_dump(m); */
/* sd_bus_message_rewind(m, true); */
if (sd_bus_message_is_method_call(m, "org.freedesktop.systemd.test", "LowerCase")) {
const char *hello;
_cleanup_free_ char *lowercase = NULL;
r = sd_bus_message_read(m, "s", &hello);
if (r < 0) {
log_error("Failed to get parameter: %s", strerror(-r));
goto fail;
}
r = sd_bus_message_new_method_return(bus, m, &reply);
if (r < 0) {
log_error("Failed to allocate return: %s", strerror(-r));
goto fail;
}
lowercase = strdup(hello);
if (!lowercase) {
r = log_oom();
goto fail;
}
ascii_strlower(lowercase);
r = sd_bus_message_append(reply, "s", lowercase);
if (r < 0) {
log_error("Failed to append message: %s", strerror(-r));
goto fail;
}
} else if (sd_bus_message_is_method_call(m, "org.freedesktop.systemd.test", "Exit"))
break;
else if (sd_bus_message_is_method_call(m, NULL, NULL)) {
const sd_bus_error e = SD_BUS_ERROR_INIT_CONST("org.freedesktop.DBus.Error.UnknownMethod", "Unknown method.");
r = sd_bus_message_new_method_error(bus, m, &e, &reply);
if (r < 0) {
log_error("Failed to allocate return: %s", strerror(-r));
goto fail;
}
}
if (reply) {
r = sd_bus_send(bus, reply, NULL);
if (r < 0) {
log_error("Failed to send reply: %s", strerror(-r));
goto fail;
}
}
}
r = 0;
fail:
if (bus)
sd_bus_unref(bus);
return INT_TO_PTR(r);
}
static int client(void) {
_cleanup_bus_message_unref_ sd_bus_message *m = NULL, *reply = NULL;
sd_bus *bus = NULL;
sd_bus_error error = SD_BUS_ERROR_INIT;
const char *hello;
int r;
r = sd_bus_open_user(&bus);
if (r < 0) {
log_error("Failed to connect to user bus: %s", strerror(-r));
goto finish;
}
r = sd_bus_message_new_method_call(
bus,
"org.freedesktop.systemd.test",
"/",
"org.freedesktop.systemd.test",
"LowerCase",
&m);
if (r < 0) {
log_error("Failed to allocate method call: %s", strerror(-r));
goto finish;
}
r = sd_bus_message_append(m, "s", "HELLO");
if (r < 0) {
log_error("Failed to append string: %s", strerror(-r));
goto finish;
}
r = sd_bus_send_with_reply_and_block(bus, m, (uint64_t) -1, &error, &reply);
if (r < 0) {
log_error("Failed to issue method call: %s", error.message);
goto finish;
}
r = sd_bus_message_read(reply, "s", &hello);
if (r < 0) {
log_error("Failed to get string: %s", strerror(-r));
goto finish;
}
assert(streq(hello, "hello"));
r = 0;
finish:
if (bus) {
_cleanup_bus_message_unref_ sd_bus_message *q;
r = sd_bus_message_new_method_call(
bus,
"org.freedesktop.systemd.test",
"/",
"org.freedesktop.systemd.test",
"Exit",
&q);
if (r < 0) {
log_error("Failed to allocate method call: %s", strerror(-r));
goto finish;
}
sd_bus_send(bus, q, NULL);
sd_bus_flush(bus);
sd_bus_unref(bus);
}
sd_bus_error_free(&error);
return r;
}
int main(int argc, char *argv[]) {
pthread_t t;
sd_bus *bus;
void *p;
int q, r;
r = server_init(&bus);
if (r < 0)
return EXIT_FAILURE;
r = pthread_create(&t, NULL, server, bus);
if (r != 0) {
sd_bus_unref(bus);
return EXIT_FAILURE;
}
r = client();
q = pthread_join(t, &p);
if (q != 0)
return EXIT_FAILURE;
if (r < 0)
return EXIT_FAILURE;
return EXIT_SUCCESS;
}