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-rw-r--r--src/libsystemd-bus/bus-control.c36
-rw-r--r--src/libsystemd-bus/bus-error.c30
-rw-r--r--src/libsystemd-bus/bus-internal.h11
-rw-r--r--src/libsystemd-bus/bus-message.c42
-rw-r--r--src/libsystemd-bus/bus-message.h2
-rw-r--r--src/libsystemd-bus/busctl.c66
-rw-r--r--src/libsystemd-bus/sd-bus.c287
-rw-r--r--src/libsystemd-bus/sd-bus.h11
-rw-r--r--src/libsystemd-bus/test-bus-chat.c242
9 files changed, 581 insertions, 146 deletions
diff --git a/src/libsystemd-bus/bus-control.c b/src/libsystemd-bus/bus-control.c
index e4cc251a4b..50e1a2c00a 100644
--- a/src/libsystemd-bus/bus-control.c
+++ b/src/libsystemd-bus/bus-control.c
@@ -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;
diff --git a/src/libsystemd-bus/bus-error.c b/src/libsystemd-bus/bus-error.c
index 015fae70ad..f86da624fd 100644
--- a/src/libsystemd-bus/bus-error.c
+++ b/src/libsystemd-bus/bus-error.c
@@ -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;
}
diff --git a/src/libsystemd-bus/bus-internal.h b/src/libsystemd-bus/bus-internal.h
index d8cdc48ce0..9a12d661e1 100644
--- a/src/libsystemd-bus/bus-internal.h
+++ b/src/libsystemd-bus/bus-internal.h
@@ -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)))
diff --git a/src/libsystemd-bus/bus-message.c b/src/libsystemd-bus/bus-message.c
index 5f3dbdb75d..c385ef5ed0 100644
--- a/src/libsystemd-bus/bus-message.c
+++ b/src/libsystemd-bus/bus-message.c
@@ -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;
+}
diff --git a/src/libsystemd-bus/bus-message.h b/src/libsystemd-bus/bus-message.h
index 3035efc8c2..0184d18dd9 100644
--- a/src/libsystemd-bus/bus-message.h
+++ b/src/libsystemd-bus/bus-message.h
@@ -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);
diff --git a/src/libsystemd-bus/busctl.c b/src/libsystemd-bus/busctl.c
index 88446fcc7c..7348894c5b 100644
--- a/src/libsystemd-bus/busctl.c
+++ b/src/libsystemd-bus/busctl.c
@@ -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;
- r = sd_bus_get_owner(bus, *i, &owner);
- if (r == -ENXIO)
- continue;
+ /* if ((*i)[0] == ':') */
+ /* continue; */
+
+ printf("%-*s", (int) max_i, *i);
- r = sd_get_owner_pid(bus, *i, &pid);
- if (r == -ENXIO)
- continue;
+ r = sd_bus_get_owner_pid(bus, *i, &pid);
+ if (r >= 0) {
+ _cleanup_free_ char *comm = NULL;
- r = sd_get_owner_uid(bus, *i, &pid);
- if (r == -ENXIO)
- continue;
- uid_valid = r >= 0;
+ printf(" %10lu", (unsigned long) pid);
- printf("%s (%s) %llu %llu\n", *i, owner, (unsigned long long) pid, (unsigned long long) uid);
+ 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 >= 0)
+ printf(" %s\n", owner);
+ else
+ printf(" -\n");
}
r = 0;
diff --git a/src/libsystemd-bus/sd-bus.c b/src/libsystemd-bus/sd-bus.c
index c5cbb5682d..f27d47cdea 100644
--- a/src/libsystemd-bus/sd-bus.c
+++ b/src/libsystemd-bus/sd-bus.c
@@ -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->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);
- free(b->unique_name);
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 = 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;
- 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;
+ }
+ }
- 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;
- }
-
- e = getenv("XDG_RUNTIME_DIR");
- if (!e)
- return -ENOENT;
-
- l = strlen(e);
- if (l + 4 > sizeof(b->sockaddr.un.sun_path))
- return -E2BIG;
+ l = strlen(e);
+ if (l + 4 > sizeof(b->sockaddr.un.sun_path))
+ return -E2BIG;
- b = bus_new();
- if (!b)
- return -ENOMEM;
+ 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;
- 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;
+ }
+ }
- 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);
diff --git a/src/libsystemd-bus/sd-bus.h b/src/libsystemd-bus/sd-bus.h
index d892562b5f..03ea4b8848 100644
--- a/src/libsystemd-bus/sd-bus.h
+++ b/src/libsystemd-bus/sd-bus.h
@@ -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, ...);
diff --git a/src/libsystemd-bus/test-bus-chat.c b/src/libsystemd-bus/test-bus-chat.c
new file mode 100644
index 0000000000..4260ca3bc0
--- /dev/null
+++ b/src/libsystemd-bus/test-bus-chat.c
@@ -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;
+}
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-14 08:26:50 +0000