assert_return(!bus_pid_changed(bus), -ECHILD);
if (bus->is_kernel) {
- _cleanup_free_ struct kdbus_cmd_names *names = NULL;
+ _cleanup_free_ struct kdbus_cmd_name_list *cmd = NULL;
+ struct kdbus_name_list *name_list;
struct kdbus_cmd_name *name;
- size_t size;
- /* assume 8k size first. If that doesn't suffice, kdbus will tell us
- * how big the buffer needs to be. */
- size = 8192;
-
- for(;;) {
- names = realloc(names, size);
- if (!names)
- return -ENOMEM;
-
- names->size = size;
- names->flags = KDBUS_NAME_LIST_UNIQUE_NAMES;
+ cmd = malloc0(sizeof(struct kdbus_cmd_name_list *));
+ if (!cmd)
+ return -ENOMEM;
- r = ioctl(sd_bus_get_fd(bus), KDBUS_CMD_NAME_LIST, names);
- if (r < 0) {
- if (errno == ENOBUFS && size != names->size) {
- size = names->size;
- continue;
- }
+ cmd->flags = KDBUS_NAME_LIST_UNIQUE_NAMES;
- return -errno;
- }
+ r = ioctl(sd_bus_get_fd(bus), KDBUS_CMD_NAME_LIST, cmd);
+ if (r < 0)
+ return -errno;
- break;
- }
+ name_list = (struct kdbus_name_list *) ((uint8_t *) bus->kdbus_buffer + cmd->offset);
- KDBUS_PART_FOREACH(name, names, names) {
+ KDBUS_PART_FOREACH(name, name_list, names) {
char *n;
if (name->size > sizeof(*name))
return -ENOMEM;
}
+ r = ioctl(sd_bus_get_fd(bus), KDBUS_CMD_FREE, &cmd->offset);
+ if (r < 0)
+ return -errno;
+
*l = x;
} else {
r = sd_bus_call_method(
return 0;
}
-static int sd_bus_get_owner_dbus(
+static int bus_get_owner_dbus(
sd_bus *bus,
const char *name,
uint64_t mask,
- char **owner,
sd_bus_creds **creds) {
- _cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
+ _cleanup_bus_message_unref_ sd_bus_message *reply_unique = NULL, *reply = NULL;
_cleanup_bus_creds_unref_ sd_bus_creds *c = NULL;
- _cleanup_free_ char *unique = NULL;
+ const char *unique = NULL;
pid_t pid = 0;
int r;
/* Only query the owner if the caller wants to know it or if
* the caller just wants to check whether a name exists */
- if (owner || mask == 0) {
- const char *found;
-
+ if ((mask & SD_BUS_CREDS_UNIQUE_NAME) || mask == 0) {
r = sd_bus_call_method(
bus,
"org.freedesktop.DBus",
"org.freedesktop.DBus",
"GetNameOwner",
NULL,
- &reply,
+ &reply_unique,
"s",
name);
if (r < 0)
return r;
- r = sd_bus_message_read(reply, "s", &found);
+ r = sd_bus_message_read(reply_unique, "s", &unique);
if (r < 0)
return r;
-
- unique = strdup(found);
- if (!unique)
- return -ENOMEM;
-
- reply = sd_bus_message_unref(reply);
}
if (mask != 0) {
if (!c)
return -ENOMEM;
- if ((mask & SD_BUS_CREDS_PID) ||
- mask & ~(SD_BUS_CREDS_PID|SD_BUS_CREDS_UID|SD_BUS_CREDS_SELINUX_CONTEXT)) {
+ if ((mask & SD_BUS_CREDS_UNIQUE_NAME) && unique) {
+ c->unique_name = strdup(unique);
+ if (!c->unique_name)
+ return -ENOMEM;
+
+ c->mask |= SD_BUS_CREDS_UNIQUE_NAME;
+ }
+
+ if (mask & (SD_BUS_CREDS_PID|SD_BUS_CREDS_PID_STARTTIME|SD_BUS_CREDS_GID|
+ SD_BUS_CREDS_COMM|SD_BUS_CREDS_EXE|SD_BUS_CREDS_CMDLINE|
+ SD_BUS_CREDS_CGROUP|SD_BUS_CREDS_UNIT|SD_BUS_CREDS_USER_UNIT|SD_BUS_CREDS_SLICE|SD_BUS_CREDS_SESSION|SD_BUS_CREDS_OWNER_UID|
+ SD_BUS_CREDS_EFFECTIVE_CAPS|SD_BUS_CREDS_PERMITTED_CAPS|SD_BUS_CREDS_INHERITABLE_CAPS|SD_BUS_CREDS_BOUNDING_CAPS|
+ SD_BUS_CREDS_AUDIT_SESSION_ID|SD_BUS_CREDS_AUDIT_LOGIN_UID)) {
uint32_t u;
r = sd_bus_call_method(
NULL,
&reply,
"s",
- name);
+ unique ? unique : name);
if (r < 0)
return r;
NULL,
&reply,
"s",
- name);
+ unique ? unique : name);
if (r < 0)
return r;
NULL,
&reply,
"s",
- name);
+ unique ? unique : name);
if (r < 0)
return r;
c = NULL;
}
- if (owner) {
- *owner = unique;
- unique = NULL;
- }
-
return 0;
}
-static int add_name_change_match(sd_bus *bus,
- uint64_t cookie,
- const char *name,
- const char *old_owner,
- const char *new_owner) {
-
- uint64_t name_id = 0, old_owner_id = 0, new_owner_id = 0;
- int is_name_id = -1, r;
- struct kdbus_item *item;
-
- assert(bus);
-
- /* If we encounter a match that could match against
- * NameOwnerChanged messages, then we need to create
- * KDBUS_MATCH_NAME_{ADD,REMOVE,CHANGE} and
- * KDBUS_MATCH_ID_{ADD,REMOVE} matches for it, possibly
- * multiple if the match is underspecified.
- *
- * The NameOwnerChanged signals take three parameters with
- * unique or well-known names, but only some forms actually
- * exist:
- *
- * WELLKNOWN, "", UNIQUE → KDBUS_MATCH_NAME_ADD
- * WELLKNOWN, UNIQUE, "" → KDBUS_MATCH_NAME_REMOVE
- * WELLKNOWN, UNIQUE, UNIQUE → KDBUS_MATCH_NAME_CHANGE
- * UNIQUE, "", UNIQUE → KDBUS_MATCH_ID_ADD
- * UNIQUE, UNIQUE, "" → KDBUS_MATCH_ID_REMOVE
- *
- * For the latter two the two unique names must be identical.
- *
- * */
-
- if (name) {
- is_name_id = bus_kernel_parse_unique_name(name, &name_id);
- if (is_name_id < 0)
- return 0;
- }
-
- if (old_owner) {
- r = bus_kernel_parse_unique_name(old_owner, &old_owner_id);
- if (r < 0)
- return 0;
- if (r == 0)
- return 0;
- if (is_name_id > 0 && old_owner_id != name_id)
- return 0;
- }
-
- if (new_owner) {
- r = bus_kernel_parse_unique_name(new_owner, &new_owner_id);
- if (r < 0)
- return r;
- if (r == 0)
- return 0;
- if (is_name_id > 0 && new_owner_id != name_id)
- return 0;
- }
-
- if (is_name_id <= 0) {
- size_t sz, l;
-
- /* If the name argument is missing or is a well-known
- * name, then add KDBUS_MATCH_NAME_{ADD,REMOVE,CHANGE}
- * matches for it */
-
- l = name ? strlen(name) : 0;
-
- sz = ALIGN8(offsetof(struct kdbus_cmd_match, items) +
- offsetof(struct kdbus_item, name_change) +
- offsetof(struct kdbus_notify_name_change, name) +
- l+1);
-
- {
- union {
- uint8_t buffer[sz];
- struct kdbus_cmd_match match;
- } m;
-
- memzero(&m, sz);
-
- m.match.size = sz;
- m.match.cookie = cookie;
- m.match.src_id = KDBUS_SRC_ID_KERNEL;
-
- item = m.match.items;
- item->size =
- offsetof(struct kdbus_item, name_change) +
- offsetof(struct kdbus_notify_name_change, name) +
- l+1;
-
- item->name_change.old_id = old_owner_id;
- item->name_change.new_id = new_owner_id;
-
- if (name)
- strcpy(item->name_change.name, name);
-
- /* If the old name is unset or empty, then
- * this can match against added names */
- if (!old_owner || old_owner[0] == 0) {
- item->type = KDBUS_MATCH_NAME_ADD;
-
- r = ioctl(bus->input_fd, KDBUS_CMD_MATCH_ADD, m);
- if (r < 0)
- return -errno;
- }
-
- /* If the new name is unset or empty, then
- * this can match against removed names */
- if (!new_owner || new_owner[0] == 0) {
- item->type = KDBUS_MATCH_NAME_REMOVE;
-
- r = ioctl(bus->input_fd, KDBUS_CMD_MATCH_ADD, m);
- if (r < 0)
- return -errno;
- }
-
- /* If the neither name is explicitly set to
- * the empty string, then this can match
- * agains changed names */
- if (!(old_owner && old_owner[0] == 0) &&
- !(new_owner && new_owner[0] == 0)) {
- item->type = KDBUS_MATCH_NAME_CHANGE;
-
- r = ioctl(bus->input_fd, KDBUS_CMD_MATCH_ADD, m);
- if (r < 0)
- return -errno;
- }
- }
- }
-
- if (is_name_id != 0) {
- uint64_t sz =
- ALIGN8(offsetof(struct kdbus_cmd_match, items) +
- offsetof(struct kdbus_item, id_change) +
- sizeof(struct kdbus_notify_id_change));
- union {
- uint8_t buffer[sz];
- struct kdbus_cmd_match match;
- } m;
-
- /* If the name argument is missing or is a unique
- * name, then add KDBUS_MATCH_ID_{ADD,REMOVE} matches
- * for it */
-
- memzero(&m, sz);
-
- m.match.size = sz;
- m.match.cookie = cookie;
- m.match.src_id = KDBUS_SRC_ID_KERNEL;
-
- item = m.match.items;
- item->size = offsetof(struct kdbus_item, id_change) + sizeof(struct kdbus_notify_id_change);
- item->id_change.id = name_id;
-
- /* If the old name is unset or empty, then this can
- * match against added ids */
- if (!old_owner || old_owner[0] == 0) {
- item->type = KDBUS_MATCH_ID_ADD;
-
- r = ioctl(bus->input_fd, KDBUS_CMD_MATCH_ADD, m);
- if (r < 0)
- return -errno;
- }
-
- /* If thew new name is unset or empty, then this can
- match against removed ids */
- if (!new_owner || new_owner[0] == 0) {
- item->type = KDBUS_MATCH_ID_REMOVE;
-
- r = ioctl(bus->input_fd, KDBUS_CMD_MATCH_ADD, m);
- if (r < 0)
- return -errno;
- }
- }
-
- return 0;
-}
-
-static int kdbus_name_query(
+static int bus_get_owner_kdbus(
sd_bus *bus,
const char *name,
uint64_t mask,
- char **owner,
sd_bus_creds **creds) {
- _cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
_cleanup_bus_creds_unref_ sd_bus_creds *c = NULL;
- _cleanup_free_ char *unique = NULL;
- struct kdbus_cmd_name_info *name_info = NULL;
+ struct kdbus_cmd_name_info *cmd;
+ struct kdbus_name_info *name_info;
struct kdbus_item *item;
- uint64_t attach_flags, m;
- size_t slen, size;
+ size_t size;
+ uint64_t m, id;
int r;
- r = kdbus_translate_attach_flags(mask, &attach_flags);
+ r = bus_kernel_parse_unique_name(name, &id);
if (r < 0)
return r;
-
- slen = strlen(name) + 1;
-
- /*
- * The structure is used for both directions. Start with 8k buffer size and
- * expand to the size kdbus reports in case we fail.
- */
- size = slen + 8192;
-
- for(;;) {
- name_info = realloc(name_info, size);
- if (!name_info)
- return -ENOMEM;
-
- memset(name_info, 0, size);
-
- name_info->size = size;
- name_info->attach_flags = attach_flags;
-
- item = name_info->items;
- item->type = KDBUS_NAME_INFO_ITEM_NAME;
- item->size = KDBUS_ITEM_SIZE(slen);
- strcpy(item->str, name);
-
- r = ioctl(sd_bus_get_fd(bus), KDBUS_CMD_NAME_QUERY, name_info);
- if (r < 0) {
- if (errno == ENOBUFS && size != name_info->size) {
- size = name_info->size;
- continue;
- }
-
- return -errno;
- }
-
- break;
+ if (r > 0) {
+ size = offsetof(struct kdbus_cmd_name_info, name);
+ cmd = alloca0(size);
+ cmd->id = id;
+ } else {
+ size = offsetof(struct kdbus_cmd_name_info, name) + strlen(name) + 1;
+ cmd = alloca0(size);
+ strcpy(cmd->name, name);
}
- asprintf(&unique, ":1.%llu", (unsigned long long) name_info->id);
+ cmd->size = size;
+ r = ioctl(bus->input_fd, KDBUS_CMD_NAME_INFO, cmd);
+ if (r < 0)
+ return -errno;
+
+ name_info = (struct kdbus_name_info *) ((uint8_t *) bus->kdbus_buffer + cmd->offset);
c = bus_creds_new();
if (!c)
return -ENOMEM;
+ if (mask & SD_BUS_CREDS_UNIQUE_NAME) {
+ if (asprintf(&c->unique_name, ":1.%llu", (unsigned long long) name_info->id) < 0)
+ return -ENOMEM;
+
+ c->mask |= SD_BUS_CREDS_UNIQUE_NAME;
+ }
+
KDBUS_PART_FOREACH(item, name_info, items) {
+
switch (item->type) {
+
case KDBUS_ITEM_CREDS:
m = (SD_BUS_CREDS_UID | SD_BUS_CREDS_GID | SD_BUS_CREDS_PID |
SD_BUS_CREDS_TID | SD_BUS_CREDS_PID_STARTTIME) & mask;
case KDBUS_ITEM_PID_COMM:
if (mask & SD_BUS_CREDS_COMM) {
c->comm = strdup(item->str);
- if (!c->comm)
- return -ENOMEM;
+ if (!c->comm) {
+ r = -ENOMEM;
+ goto fail;
+ }
c->mask |= SD_BUS_CREDS_COMM;
}
case KDBUS_ITEM_TID_COMM:
if (mask & SD_BUS_CREDS_TID_COMM) {
c->tid_comm = strdup(item->str);
- if (!c->tid_comm)
- return -ENOMEM;
+ if (!c->tid_comm) {
+ r = -ENOMEM;
+ goto fail;
+ }
c->mask |= SD_BUS_CREDS_TID_COMM;
}
case KDBUS_ITEM_EXE:
if (mask & SD_BUS_CREDS_EXE) {
c->exe = strdup(item->str);
- if (!c->exe)
- return -ENOMEM;
+ if (!c->exe) {
+ r = -ENOMEM;
+ goto fail;
+ }
c->mask |= SD_BUS_CREDS_EXE;
}
case KDBUS_ITEM_CMDLINE:
if (mask & SD_BUS_CREDS_CMDLINE) {
- c->cmdline_length = item->size - KDBUS_PART_HEADER_SIZE;
- c->cmdline = memdup(item->data, c->cmdline_length);
- if (!c->cmdline)
- return -ENOMEM;
+ c->cmdline_size = item->size - KDBUS_PART_HEADER_SIZE;
+ c->cmdline = memdup(item->data, c->cmdline_size);
+ if (!c->cmdline) {
+ r = -ENOMEM;
+ goto fail;
+ }
c->mask |= SD_BUS_CREDS_CMDLINE;
}
if (m) {
c->cgroup = strdup(item->str);
- if (!c->cgroup)
- return -ENOMEM;
+ if (!c->cgroup) {
+ r = -ENOMEM;
+ goto fail;
+ }
c->mask |= m;
}
if (m) {
c->capability_size = item->size - KDBUS_PART_HEADER_SIZE;
c->capability = memdup(item->data, c->capability_size);
- if (!c->capability)
- return -ENOMEM;
+ if (!c->capability) {
+ r = -ENOMEM;
+ goto fail;
+ }
c->mask |= m;
}
case KDBUS_ITEM_SECLABEL:
if (mask & SD_BUS_CREDS_SELINUX_CONTEXT) {
c->label = strdup(item->str);
- if (!c->label)
- return -ENOMEM;
+ if (!c->label) {
+ r = -ENOMEM;
+ goto fail;
+ }
c->mask |= SD_BUS_CREDS_SELINUX_CONTEXT;
}
c->mask |= m;
}
break;
+
+ case KDBUS_ITEM_NAMES:
+ if (mask & SD_BUS_CREDS_WELL_KNOWN_NAMES) {
+ c->well_known_names_size = item->size - KDBUS_PART_HEADER_SIZE;
+ c->well_known_names = memdup(item->data, c->well_known_names_size);
+ if (!c->well_known_names) {
+ r = -ENOMEM;
+ goto fail;
+ }
+
+ c->mask |= SD_BUS_CREDS_WELL_KNOWN_NAMES;
+ }
+ break;
}
}
c = NULL;
}
- if (owner) {
- *owner = unique;
- unique = NULL;
- }
+ r = 0;
- return 0;
+fail:
+ ioctl(bus->input_fd, KDBUS_CMD_FREE, &cmd->offset);
+ return r;
}
_public_ int sd_bus_get_owner(
sd_bus *bus,
const char *name,
uint64_t mask,
- char **owner,
sd_bus_creds **creds) {
assert_return(bus, -EINVAL);
assert_return(!bus_pid_changed(bus), -ECHILD);
if (bus->is_kernel)
- return kdbus_name_query(bus, name, mask, owner, creds);
+ return bus_get_owner_kdbus(bus, name, mask, creds);
+ else
+ return bus_get_owner_dbus(bus, name, mask, creds);
+}
+
+static int add_name_change_match(sd_bus *bus,
+ uint64_t cookie,
+ const char *name,
+ const char *old_owner,
+ const char *new_owner) {
+
+ uint64_t name_id = 0, old_owner_id = 0, new_owner_id = 0;
+ int is_name_id = -1, r;
+ struct kdbus_item *item;
+
+ assert(bus);
+
+ /* If we encounter a match that could match against
+ * NameOwnerChanged messages, then we need to create
+ * KDBUS_MATCH_NAME_{ADD,REMOVE,CHANGE} and
+ * KDBUS_MATCH_ID_{ADD,REMOVE} matches for it, possibly
+ * multiple if the match is underspecified.
+ *
+ * The NameOwnerChanged signals take three parameters with
+ * unique or well-known names, but only some forms actually
+ * exist:
+ *
+ * WELLKNOWN, "", UNIQUE → KDBUS_MATCH_NAME_ADD
+ * WELLKNOWN, UNIQUE, "" → KDBUS_MATCH_NAME_REMOVE
+ * WELLKNOWN, UNIQUE, UNIQUE → KDBUS_MATCH_NAME_CHANGE
+ * UNIQUE, "", UNIQUE → KDBUS_MATCH_ID_ADD
+ * UNIQUE, UNIQUE, "" → KDBUS_MATCH_ID_REMOVE
+ *
+ * For the latter two the two unique names must be identical.
+ *
+ * */
+
+ if (name) {
+ is_name_id = bus_kernel_parse_unique_name(name, &name_id);
+ if (is_name_id < 0)
+ return 0;
+ }
+
+ if (old_owner) {
+ r = bus_kernel_parse_unique_name(old_owner, &old_owner_id);
+ if (r < 0)
+ return 0;
+ if (r == 0)
+ return 0;
+ if (is_name_id > 0 && old_owner_id != name_id)
+ return 0;
+ }
+
+ if (new_owner) {
+ r = bus_kernel_parse_unique_name(new_owner, &new_owner_id);
+ if (r < 0)
+ return r;
+ if (r == 0)
+ return 0;
+ if (is_name_id > 0 && new_owner_id != name_id)
+ return 0;
+ }
- return sd_bus_get_owner_dbus(bus, name, mask, owner, creds);
+ if (is_name_id <= 0) {
+ struct kdbus_cmd_match *m;
+ size_t sz, l;
+
+ /* If the name argument is missing or is a well-known
+ * name, then add KDBUS_MATCH_NAME_{ADD,REMOVE,CHANGE}
+ * matches for it */
+
+ l = name ? strlen(name) : 0;
+
+ sz = ALIGN8(offsetof(struct kdbus_cmd_match, items) +
+ offsetof(struct kdbus_item, name_change) +
+ offsetof(struct kdbus_notify_name_change, name) +
+ l+1);
+
+ m = alloca0(sz);
+ m->size = sz;
+ m->cookie = cookie;
+ m->src_id = KDBUS_SRC_ID_KERNEL;
+
+ item = m->items;
+ item->size =
+ offsetof(struct kdbus_item, name_change) +
+ offsetof(struct kdbus_notify_name_change, name) +
+ l+1;
+
+ item->name_change.old_id = old_owner_id;
+ item->name_change.new_id = new_owner_id;
+
+ if (name)
+ strcpy(item->name_change.name, name);
+
+ /* If the old name is unset or empty, then
+ * this can match against added names */
+ if (!old_owner || old_owner[0] == 0) {
+ item->type = KDBUS_MATCH_NAME_ADD;
+
+ r = ioctl(bus->input_fd, KDBUS_CMD_MATCH_ADD, m);
+ if (r < 0)
+ return -errno;
+ }
+
+ /* If the new name is unset or empty, then
+ * this can match against removed names */
+ if (!new_owner || new_owner[0] == 0) {
+ item->type = KDBUS_MATCH_NAME_REMOVE;
+
+ r = ioctl(bus->input_fd, KDBUS_CMD_MATCH_ADD, m);
+ if (r < 0)
+ return -errno;
+ }
+
+ /* If the neither name is explicitly set to
+ * the empty string, then this can match
+ * agains changed names */
+ if (!(old_owner && old_owner[0] == 0) &&
+ !(new_owner && new_owner[0] == 0)) {
+ item->type = KDBUS_MATCH_NAME_CHANGE;
+
+ r = ioctl(bus->input_fd, KDBUS_CMD_MATCH_ADD, m);
+ if (r < 0)
+ return -errno;
+ }
+ }
+
+ if (is_name_id != 0) {
+ struct kdbus_cmd_match *m;
+ uint64_t sz;
+
+ /* If the name argument is missing or is a unique
+ * name, then add KDBUS_MATCH_ID_{ADD,REMOVE} matches
+ * for it */
+
+ sz = ALIGN8(offsetof(struct kdbus_cmd_match, items) +
+ offsetof(struct kdbus_item, id_change) +
+ sizeof(struct kdbus_notify_id_change));
+
+ m = alloca0(sz);
+ m->size = sz;
+ m->cookie = cookie;
+ m->src_id = KDBUS_SRC_ID_KERNEL;
+
+ item = m->items;
+ item->size = offsetof(struct kdbus_item, id_change) + sizeof(struct kdbus_notify_id_change);
+ item->id_change.id = name_id;
+
+ /* If the old name is unset or empty, then this can
+ * match against added ids */
+ if (!old_owner || old_owner[0] == 0) {
+ item->type = KDBUS_MATCH_ID_ADD;
+
+ r = ioctl(bus->input_fd, KDBUS_CMD_MATCH_ADD, m);
+ if (r < 0)
+ return -errno;
+ }
+
+ /* If thew new name is unset or empty, then this can
+ match against removed ids */
+ if (!new_owner || new_owner[0] == 0) {
+ item->type = KDBUS_MATCH_ID_REMOVE;
+
+ r = ioctl(bus->input_fd, KDBUS_CMD_MATCH_ADD, m);
+ if (r < 0)
+ return -errno;
+ }
+ }
+
+ return 0;
}
int bus_add_match_internal(
~ianmdlvl / elogind.git / blobdiff