| /* SPDX-License-Identifier: LGPL-2.1-or-later */ |
| |
| #if HAVE_VALGRIND_MEMCHECK_H |
| #include <valgrind/memcheck.h> |
| #endif |
| |
| #include <errno.h> |
| #include <stddef.h> |
| |
| #include "sd-bus.h" |
| |
| #include "alloc-util.h" |
| #include "bus-control.h" |
| #include "bus-internal.h" |
| #include "bus-message.h" |
| #include "capability-util.h" |
| #include "process-util.h" |
| #include "stdio-util.h" |
| #include "string-util.h" |
| #include "strv.h" |
| #include "user-util.h" |
| |
| _public_ int sd_bus_get_unique_name(sd_bus *bus, const char **unique) { |
| int r; |
| |
| assert_return(bus, -EINVAL); |
| assert_return(bus = bus_resolve(bus), -ENOPKG); |
| assert_return(unique, -EINVAL); |
| assert_return(!bus_pid_changed(bus), -ECHILD); |
| |
| if (!bus->bus_client) |
| return -EINVAL; |
| |
| r = bus_ensure_running(bus); |
| if (r < 0) |
| return r; |
| |
| *unique = bus->unique_name; |
| return 0; |
| } |
| |
| static int validate_request_name_parameters( |
| sd_bus *bus, |
| const char *name, |
| uint64_t flags, |
| uint32_t *ret_param) { |
| |
| uint32_t param = 0; |
| |
| assert(bus); |
| assert(name); |
| assert(ret_param); |
| |
| assert_return(!(flags & ~(SD_BUS_NAME_ALLOW_REPLACEMENT|SD_BUS_NAME_REPLACE_EXISTING|SD_BUS_NAME_QUEUE)), -EINVAL); |
| assert_return(service_name_is_valid(name), -EINVAL); |
| assert_return(name[0] != ':', -EINVAL); |
| |
| if (!bus->bus_client) |
| return -EINVAL; |
| |
| /* Don't allow requesting the special driver and local names */ |
| if (STR_IN_SET(name, "org.freedesktop.DBus", "org.freedesktop.DBus.Local")) |
| return -EINVAL; |
| |
| if (!BUS_IS_OPEN(bus->state)) |
| return -ENOTCONN; |
| |
| if (flags & SD_BUS_NAME_ALLOW_REPLACEMENT) |
| param |= BUS_NAME_ALLOW_REPLACEMENT; |
| if (flags & SD_BUS_NAME_REPLACE_EXISTING) |
| param |= BUS_NAME_REPLACE_EXISTING; |
| if (!(flags & SD_BUS_NAME_QUEUE)) |
| param |= BUS_NAME_DO_NOT_QUEUE; |
| |
| *ret_param = param; |
| |
| return 0; |
| } |
| |
| _public_ int sd_bus_request_name( |
| sd_bus *bus, |
| const char *name, |
| uint64_t flags) { |
| |
| _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; |
| uint32_t ret, param = 0; |
| int r; |
| |
| assert_return(bus, -EINVAL); |
| assert_return(bus = bus_resolve(bus), -ENOPKG); |
| assert_return(name, -EINVAL); |
| assert_return(!bus_pid_changed(bus), -ECHILD); |
| |
| r = validate_request_name_parameters(bus, name, flags, ¶m); |
| if (r < 0) |
| return r; |
| |
| r = sd_bus_call_method( |
| bus, |
| "org.freedesktop.DBus", |
| "/org/freedesktop/DBus", |
| "org.freedesktop.DBus", |
| "RequestName", |
| NULL, |
| &reply, |
| "su", |
| name, |
| param); |
| if (r < 0) |
| return r; |
| |
| r = sd_bus_message_read(reply, "u", &ret); |
| if (r < 0) |
| return r; |
| |
| switch (ret) { |
| |
| case BUS_NAME_ALREADY_OWNER: |
| return -EALREADY; |
| |
| case BUS_NAME_EXISTS: |
| return -EEXIST; |
| |
| case BUS_NAME_IN_QUEUE: |
| return 0; |
| |
| case BUS_NAME_PRIMARY_OWNER: |
| return 1; |
| } |
| |
| return -EIO; |
| } |
| |
| static int default_request_name_handler( |
| sd_bus_message *m, |
| void *userdata, |
| sd_bus_error *ret_error) { |
| |
| uint32_t ret; |
| int r; |
| |
| assert(m); |
| |
| if (sd_bus_message_is_method_error(m, NULL)) { |
| log_debug_errno(sd_bus_message_get_errno(m), |
| "Unable to request name, failing connection: %s", |
| sd_bus_message_get_error(m)->message); |
| |
| bus_enter_closing(sd_bus_message_get_bus(m)); |
| return 1; |
| } |
| |
| r = sd_bus_message_read(m, "u", &ret); |
| if (r < 0) |
| return r; |
| |
| switch (ret) { |
| |
| case BUS_NAME_ALREADY_OWNER: |
| log_debug("Already owner of requested service name, ignoring."); |
| return 1; |
| |
| case BUS_NAME_IN_QUEUE: |
| log_debug("In queue for requested service name."); |
| return 1; |
| |
| case BUS_NAME_PRIMARY_OWNER: |
| log_debug("Successfully acquired requested service name."); |
| return 1; |
| |
| case BUS_NAME_EXISTS: |
| log_debug("Requested service name already owned, failing connection."); |
| bus_enter_closing(sd_bus_message_get_bus(m)); |
| return 1; |
| } |
| |
| log_debug("Unexpected response from RequestName(), failing connection."); |
| bus_enter_closing(sd_bus_message_get_bus(m)); |
| return 1; |
| } |
| |
| _public_ int sd_bus_request_name_async( |
| sd_bus *bus, |
| sd_bus_slot **ret_slot, |
| const char *name, |
| uint64_t flags, |
| sd_bus_message_handler_t callback, |
| void *userdata) { |
| |
| uint32_t param = 0; |
| int r; |
| |
| assert_return(bus, -EINVAL); |
| assert_return(bus = bus_resolve(bus), -ENOPKG); |
| assert_return(name, -EINVAL); |
| assert_return(!bus_pid_changed(bus), -ECHILD); |
| |
| r = validate_request_name_parameters(bus, name, flags, ¶m); |
| if (r < 0) |
| return r; |
| |
| return sd_bus_call_method_async( |
| bus, |
| ret_slot, |
| "org.freedesktop.DBus", |
| "/org/freedesktop/DBus", |
| "org.freedesktop.DBus", |
| "RequestName", |
| callback ?: default_request_name_handler, |
| userdata, |
| "su", |
| name, |
| param); |
| } |
| |
| static int validate_release_name_parameters( |
| sd_bus *bus, |
| const char *name) { |
| |
| assert(bus); |
| assert(name); |
| |
| assert_return(service_name_is_valid(name), -EINVAL); |
| assert_return(name[0] != ':', -EINVAL); |
| |
| if (!bus->bus_client) |
| return -EINVAL; |
| |
| /* Don't allow releasing the special driver and local names */ |
| if (STR_IN_SET(name, "org.freedesktop.DBus", "org.freedesktop.DBus.Local")) |
| return -EINVAL; |
| |
| if (!BUS_IS_OPEN(bus->state)) |
| return -ENOTCONN; |
| |
| return 0; |
| } |
| |
| _public_ int sd_bus_release_name( |
| sd_bus *bus, |
| const char *name) { |
| |
| _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; |
| uint32_t ret; |
| int r; |
| |
| assert_return(bus, -EINVAL); |
| assert_return(bus = bus_resolve(bus), -ENOPKG); |
| assert_return(name, -EINVAL); |
| assert_return(!bus_pid_changed(bus), -ECHILD); |
| |
| r = validate_release_name_parameters(bus, name); |
| if (r < 0) |
| return r; |
| |
| r = sd_bus_call_method( |
| bus, |
| "org.freedesktop.DBus", |
| "/org/freedesktop/DBus", |
| "org.freedesktop.DBus", |
| "ReleaseName", |
| NULL, |
| &reply, |
| "s", |
| name); |
| if (r < 0) |
| return r; |
| |
| r = sd_bus_message_read(reply, "u", &ret); |
| if (r < 0) |
| return r; |
| |
| switch (ret) { |
| |
| case BUS_NAME_NON_EXISTENT: |
| return -ESRCH; |
| |
| case BUS_NAME_NOT_OWNER: |
| return -EADDRINUSE; |
| |
| case BUS_NAME_RELEASED: |
| return 0; |
| } |
| |
| return -EIO; |
| } |
| |
| static int default_release_name_handler( |
| sd_bus_message *m, |
| void *userdata, |
| sd_bus_error *ret_error) { |
| |
| uint32_t ret; |
| int r; |
| |
| assert(m); |
| |
| if (sd_bus_message_is_method_error(m, NULL)) { |
| log_debug_errno(sd_bus_message_get_errno(m), |
| "Unable to release name, failing connection: %s", |
| sd_bus_message_get_error(m)->message); |
| |
| bus_enter_closing(sd_bus_message_get_bus(m)); |
| return 1; |
| } |
| |
| r = sd_bus_message_read(m, "u", &ret); |
| if (r < 0) |
| return r; |
| |
| switch (ret) { |
| |
| case BUS_NAME_NON_EXISTENT: |
| log_debug("Name asked to release is not taken currently, ignoring."); |
| return 1; |
| |
| case BUS_NAME_NOT_OWNER: |
| log_debug("Name asked to release is owned by somebody else, ignoring."); |
| return 1; |
| |
| case BUS_NAME_RELEASED: |
| log_debug("Name successfully released."); |
| return 1; |
| } |
| |
| log_debug("Unexpected response from ReleaseName(), failing connection."); |
| bus_enter_closing(sd_bus_message_get_bus(m)); |
| return 1; |
| } |
| |
| _public_ int sd_bus_release_name_async( |
| sd_bus *bus, |
| sd_bus_slot **ret_slot, |
| const char *name, |
| sd_bus_message_handler_t callback, |
| void *userdata) { |
| |
| int r; |
| |
| assert_return(bus, -EINVAL); |
| assert_return(bus = bus_resolve(bus), -ENOPKG); |
| assert_return(name, -EINVAL); |
| assert_return(!bus_pid_changed(bus), -ECHILD); |
| |
| r = validate_release_name_parameters(bus, name); |
| if (r < 0) |
| return r; |
| |
| return sd_bus_call_method_async( |
| bus, |
| ret_slot, |
| "org.freedesktop.DBus", |
| "/org/freedesktop/DBus", |
| "org.freedesktop.DBus", |
| "ReleaseName", |
| callback ?: default_release_name_handler, |
| userdata, |
| "s", |
| name); |
| } |
| |
| _public_ int sd_bus_list_names(sd_bus *bus, char ***acquired, char ***activatable) { |
| _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; |
| _cleanup_strv_free_ char **x = NULL, **y = NULL; |
| int r; |
| |
| assert_return(bus, -EINVAL); |
| assert_return(bus = bus_resolve(bus), -ENOPKG); |
| assert_return(acquired || activatable, -EINVAL); |
| assert_return(!bus_pid_changed(bus), -ECHILD); |
| |
| if (!bus->bus_client) |
| return -EINVAL; |
| |
| if (!BUS_IS_OPEN(bus->state)) |
| return -ENOTCONN; |
| |
| if (acquired) { |
| r = sd_bus_call_method( |
| bus, |
| "org.freedesktop.DBus", |
| "/org/freedesktop/DBus", |
| "org.freedesktop.DBus", |
| "ListNames", |
| NULL, |
| &reply, |
| NULL); |
| if (r < 0) |
| return r; |
| |
| r = sd_bus_message_read_strv(reply, &x); |
| if (r < 0) |
| return r; |
| |
| reply = sd_bus_message_unref(reply); |
| } |
| |
| if (activatable) { |
| r = sd_bus_call_method( |
| bus, |
| "org.freedesktop.DBus", |
| "/org/freedesktop/DBus", |
| "org.freedesktop.DBus", |
| "ListActivatableNames", |
| NULL, |
| &reply, |
| NULL); |
| if (r < 0) |
| return r; |
| |
| r = sd_bus_message_read_strv(reply, &y); |
| if (r < 0) |
| return r; |
| |
| *activatable = TAKE_PTR(y); |
| } |
| |
| if (acquired) |
| *acquired = TAKE_PTR(x); |
| |
| return 0; |
| } |
| |
| _public_ int sd_bus_get_name_creds( |
| sd_bus *bus, |
| const char *name, |
| uint64_t mask, |
| sd_bus_creds **creds) { |
| |
| _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply_unique = NULL, *reply = NULL; |
| _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *c = NULL; |
| const char *unique; |
| pid_t pid = 0; |
| int r; |
| |
| assert_return(bus, -EINVAL); |
| assert_return(bus = bus_resolve(bus), -ENOPKG); |
| assert_return(name, -EINVAL); |
| assert_return((mask & ~SD_BUS_CREDS_AUGMENT) <= _SD_BUS_CREDS_ALL, -EOPNOTSUPP); |
| assert_return(mask == 0 || creds, -EINVAL); |
| assert_return(!bus_pid_changed(bus), -ECHILD); |
| assert_return(service_name_is_valid(name), -EINVAL); |
| |
| if (!bus->bus_client) |
| return -EINVAL; |
| |
| /* Turn off augmenting if this isn't a local connection. If the connection is not local, then /proc is not |
| * going to match. */ |
| if (!bus->is_local) |
| mask &= ~SD_BUS_CREDS_AUGMENT; |
| |
| if (streq(name, "org.freedesktop.DBus.Local")) |
| return -EINVAL; |
| |
| if (streq(name, "org.freedesktop.DBus")) |
| return sd_bus_get_owner_creds(bus, mask, creds); |
| |
| if (!BUS_IS_OPEN(bus->state)) |
| return -ENOTCONN; |
| |
| /* If the name is unique anyway, we can use it directly */ |
| unique = name[0] == ':' ? name : NULL; |
| |
| /* Only query the owner if the caller wants to know it and the name is not unique anyway, or if the caller just |
| * wants to check whether a name exists */ |
| if ((FLAGS_SET(mask, SD_BUS_CREDS_UNIQUE_NAME) && !unique) || mask == 0) { |
| r = sd_bus_call_method( |
| bus, |
| "org.freedesktop.DBus", |
| "/org/freedesktop/DBus", |
| "org.freedesktop.DBus", |
| "GetNameOwner", |
| NULL, |
| &reply_unique, |
| "s", |
| name); |
| if (r < 0) |
| return r; |
| |
| r = sd_bus_message_read(reply_unique, "s", &unique); |
| if (r < 0) |
| return r; |
| } |
| |
| if (mask != 0) { |
| _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
| bool need_pid, need_uid, need_selinux, need_separate_calls; |
| |
| c = bus_creds_new(); |
| if (!c) |
| return -ENOMEM; |
| |
| 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; |
| } |
| |
| need_pid = (mask & SD_BUS_CREDS_PID) || |
| ((mask & SD_BUS_CREDS_AUGMENT) && |
| (mask & (SD_BUS_CREDS_UID|SD_BUS_CREDS_SUID|SD_BUS_CREDS_FSUID| |
| SD_BUS_CREDS_GID|SD_BUS_CREDS_EGID|SD_BUS_CREDS_SGID|SD_BUS_CREDS_FSGID| |
| SD_BUS_CREDS_SUPPLEMENTARY_GIDS| |
| 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_SELINUX_CONTEXT| |
| SD_BUS_CREDS_AUDIT_SESSION_ID|SD_BUS_CREDS_AUDIT_LOGIN_UID))); |
| need_uid = mask & SD_BUS_CREDS_EUID; |
| need_selinux = mask & SD_BUS_CREDS_SELINUX_CONTEXT; |
| |
| if (need_pid + need_uid + need_selinux > 1) { |
| |
| /* If we need more than one of the credentials, then use GetConnectionCredentials() */ |
| |
| r = sd_bus_call_method( |
| bus, |
| "org.freedesktop.DBus", |
| "/org/freedesktop/DBus", |
| "org.freedesktop.DBus", |
| "GetConnectionCredentials", |
| &error, |
| &reply, |
| "s", |
| unique ?: name); |
| |
| if (r < 0) { |
| |
| if (!sd_bus_error_has_name(&error, SD_BUS_ERROR_UNKNOWN_METHOD)) |
| return r; |
| |
| /* If we got an unknown method error, fall back to the individual calls... */ |
| need_separate_calls = true; |
| sd_bus_error_free(&error); |
| |
| } else { |
| need_separate_calls = false; |
| |
| r = sd_bus_message_enter_container(reply, 'a', "{sv}"); |
| if (r < 0) |
| return r; |
| |
| for (;;) { |
| const char *m; |
| |
| r = sd_bus_message_enter_container(reply, 'e', "sv"); |
| if (r < 0) |
| return r; |
| if (r == 0) |
| break; |
| |
| r = sd_bus_message_read(reply, "s", &m); |
| if (r < 0) |
| return r; |
| |
| if (need_uid && streq(m, "UnixUserID")) { |
| uint32_t u; |
| |
| r = sd_bus_message_read(reply, "v", "u", &u); |
| if (r < 0) |
| return r; |
| |
| c->euid = u; |
| c->mask |= SD_BUS_CREDS_EUID; |
| |
| } else if (need_pid && streq(m, "ProcessID")) { |
| uint32_t p; |
| |
| r = sd_bus_message_read(reply, "v", "u", &p); |
| if (r < 0) |
| return r; |
| |
| pid = p; |
| if (mask & SD_BUS_CREDS_PID) { |
| c->pid = p; |
| c->mask |= SD_BUS_CREDS_PID; |
| } |
| |
| } else if (need_selinux && streq(m, "LinuxSecurityLabel")) { |
| const void *p = NULL; |
| size_t sz = 0; |
| |
| r = sd_bus_message_enter_container(reply, 'v', "ay"); |
| if (r < 0) |
| return r; |
| |
| r = sd_bus_message_read_array(reply, 'y', &p, &sz); |
| if (r < 0) |
| return r; |
| |
| free(c->label); |
| c->label = strndup(p, sz); |
| if (!c->label) |
| return -ENOMEM; |
| |
| c->mask |= SD_BUS_CREDS_SELINUX_CONTEXT; |
| |
| r = sd_bus_message_exit_container(reply); |
| if (r < 0) |
| return r; |
| } else { |
| r = sd_bus_message_skip(reply, "v"); |
| if (r < 0) |
| return r; |
| } |
| |
| r = sd_bus_message_exit_container(reply); |
| if (r < 0) |
| return r; |
| } |
| |
| r = sd_bus_message_exit_container(reply); |
| if (r < 0) |
| return r; |
| |
| if (need_pid && pid == 0) |
| return -EPROTO; |
| } |
| |
| } else /* When we only need a single field, then let's use separate calls */ |
| need_separate_calls = true; |
| |
| if (need_separate_calls) { |
| if (need_pid) { |
| uint32_t u; |
| |
| r = sd_bus_call_method( |
| bus, |
| "org.freedesktop.DBus", |
| "/org/freedesktop/DBus", |
| "org.freedesktop.DBus", |
| "GetConnectionUnixProcessID", |
| NULL, |
| &reply, |
| "s", |
| unique ?: name); |
| if (r < 0) |
| return r; |
| |
| r = sd_bus_message_read(reply, "u", &u); |
| if (r < 0) |
| return r; |
| |
| pid = u; |
| if (mask & SD_BUS_CREDS_PID) { |
| c->pid = u; |
| c->mask |= SD_BUS_CREDS_PID; |
| } |
| |
| reply = sd_bus_message_unref(reply); |
| } |
| |
| if (need_uid) { |
| uint32_t u; |
| |
| r = sd_bus_call_method( |
| bus, |
| "org.freedesktop.DBus", |
| "/org/freedesktop/DBus", |
| "org.freedesktop.DBus", |
| "GetConnectionUnixUser", |
| NULL, |
| &reply, |
| "s", |
| unique ?: name); |
| if (r < 0) |
| return r; |
| |
| r = sd_bus_message_read(reply, "u", &u); |
| if (r < 0) |
| return r; |
| |
| c->euid = u; |
| c->mask |= SD_BUS_CREDS_EUID; |
| |
| reply = sd_bus_message_unref(reply); |
| } |
| |
| if (need_selinux) { |
| const void *p = NULL; |
| size_t sz = 0; |
| |
| r = sd_bus_call_method( |
| bus, |
| "org.freedesktop.DBus", |
| "/org/freedesktop/DBus", |
| "org.freedesktop.DBus", |
| "GetConnectionSELinuxSecurityContext", |
| &error, |
| &reply, |
| "s", |
| unique ?: name); |
| if (r < 0) { |
| if (!sd_bus_error_has_name(&error, "org.freedesktop.DBus.Error.SELinuxSecurityContextUnknown")) |
| return r; |
| |
| /* no data is fine */ |
| } else { |
| r = sd_bus_message_read_array(reply, 'y', &p, &sz); |
| if (r < 0) |
| return r; |
| |
| c->label = memdup_suffix0(p, sz); |
| if (!c->label) |
| return -ENOMEM; |
| |
| c->mask |= SD_BUS_CREDS_SELINUX_CONTEXT; |
| } |
| } |
| } |
| |
| r = bus_creds_add_more(c, mask, pid, 0); |
| if (r < 0 && r != -ESRCH) /* Return the error, but ignore ESRCH which just means the process is already gone */ |
| return r; |
| } |
| |
| if (creds) |
| *creds = TAKE_PTR(c); |
| |
| return 0; |
| } |
| |
| _public_ int sd_bus_get_owner_creds(sd_bus *bus, uint64_t mask, sd_bus_creds **ret) { |
| _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *c = NULL; |
| bool do_label, do_groups; |
| pid_t pid = 0; |
| int r; |
| |
| assert_return(bus, -EINVAL); |
| assert_return(bus = bus_resolve(bus), -ENOPKG); |
| assert_return((mask & ~SD_BUS_CREDS_AUGMENT) <= _SD_BUS_CREDS_ALL, -EOPNOTSUPP); |
| assert_return(ret, -EINVAL); |
| assert_return(!bus_pid_changed(bus), -ECHILD); |
| |
| if (!BUS_IS_OPEN(bus->state)) |
| return -ENOTCONN; |
| |
| if (!bus->is_local) |
| mask &= ~SD_BUS_CREDS_AUGMENT; |
| |
| do_label = bus->label && (mask & SD_BUS_CREDS_SELINUX_CONTEXT); |
| do_groups = bus->n_groups != SIZE_MAX && (mask & SD_BUS_CREDS_SUPPLEMENTARY_GIDS); |
| |
| /* Avoid allocating anything if we have no chance of returning useful data */ |
| if (!bus->ucred_valid && !do_label && !do_groups) |
| return -ENODATA; |
| |
| c = bus_creds_new(); |
| if (!c) |
| return -ENOMEM; |
| |
| if (bus->ucred_valid) { |
| if (pid_is_valid(bus->ucred.pid)) { |
| pid = c->pid = bus->ucred.pid; |
| c->mask |= SD_BUS_CREDS_PID & mask; |
| } |
| |
| if (uid_is_valid(bus->ucred.uid)) { |
| c->euid = bus->ucred.uid; |
| c->mask |= SD_BUS_CREDS_EUID & mask; |
| } |
| |
| if (gid_is_valid(bus->ucred.gid)) { |
| c->egid = bus->ucred.gid; |
| c->mask |= SD_BUS_CREDS_EGID & mask; |
| } |
| } |
| |
| if (do_label) { |
| c->label = strdup(bus->label); |
| if (!c->label) |
| return -ENOMEM; |
| |
| c->mask |= SD_BUS_CREDS_SELINUX_CONTEXT; |
| } |
| |
| if (do_groups) { |
| c->supplementary_gids = newdup(gid_t, bus->groups, bus->n_groups); |
| if (!c->supplementary_gids) |
| return -ENOMEM; |
| |
| c->n_supplementary_gids = bus->n_groups; |
| |
| c->mask |= SD_BUS_CREDS_SUPPLEMENTARY_GIDS; |
| } |
| |
| r = bus_creds_add_more(c, mask, pid, 0); |
| if (r < 0 && r != -ESRCH) /* If the process vanished, then don't complain, just return what we got */ |
| return r; |
| |
| *ret = TAKE_PTR(c); |
| |
| return 0; |
| } |
| |
| #define append_eavesdrop(bus, m) \ |
| ((bus)->is_monitor \ |
| ? (isempty(m) ? "eavesdrop='true'" : strjoina((m), ",eavesdrop='true'")) \ |
| : (m)) |
| |
| int bus_add_match_internal( |
| sd_bus *bus, |
| const char *match, |
| uint64_t *ret_counter) { |
| |
| _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; |
| const char *e; |
| int r; |
| |
| assert(bus); |
| |
| if (!bus->bus_client) |
| return -EINVAL; |
| |
| e = append_eavesdrop(bus, match); |
| |
| r = sd_bus_call_method( |
| bus, |
| "org.freedesktop.DBus", |
| "/org/freedesktop/DBus", |
| "org.freedesktop.DBus", |
| "AddMatch", |
| NULL, |
| &reply, |
| "s", |
| e); |
| if (r < 0) |
| return r; |
| |
| /* If the caller asked for it, return the read counter of the reply */ |
| if (ret_counter) |
| *ret_counter = reply->read_counter; |
| |
| return r; |
| } |
| |
| int bus_add_match_internal_async( |
| sd_bus *bus, |
| sd_bus_slot **ret_slot, |
| const char *match, |
| sd_bus_message_handler_t callback, |
| void *userdata) { |
| |
| const char *e; |
| |
| assert(bus); |
| |
| if (!bus->bus_client) |
| return -EINVAL; |
| |
| e = append_eavesdrop(bus, match); |
| |
| return sd_bus_call_method_async( |
| bus, |
| ret_slot, |
| "org.freedesktop.DBus", |
| "/org/freedesktop/DBus", |
| "org.freedesktop.DBus", |
| "AddMatch", |
| callback, |
| userdata, |
| "s", |
| e); |
| } |
| |
| int bus_remove_match_internal( |
| sd_bus *bus, |
| const char *match) { |
| |
| const char *e; |
| |
| assert(bus); |
| assert(match); |
| |
| if (!bus->bus_client) |
| return -EINVAL; |
| |
| e = append_eavesdrop(bus, match); |
| |
| /* Fire and forget */ |
| |
| return sd_bus_call_method_async( |
| bus, |
| NULL, |
| "org.freedesktop.DBus", |
| "/org/freedesktop/DBus", |
| "org.freedesktop.DBus", |
| "RemoveMatch", |
| NULL, |
| NULL, |
| "s", |
| e); |
| } |
| |
| _public_ int sd_bus_get_name_machine_id(sd_bus *bus, const char *name, sd_id128_t *machine) { |
| _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL, *m = NULL; |
| const char *mid; |
| int r; |
| |
| assert_return(bus, -EINVAL); |
| assert_return(bus = bus_resolve(bus), -ENOPKG); |
| assert_return(name, -EINVAL); |
| assert_return(machine, -EINVAL); |
| assert_return(!bus_pid_changed(bus), -ECHILD); |
| assert_return(service_name_is_valid(name), -EINVAL); |
| |
| if (!bus->bus_client) |
| return -EINVAL; |
| |
| if (!BUS_IS_OPEN(bus->state)) |
| return -ENOTCONN; |
| |
| if (streq_ptr(name, bus->unique_name)) |
| return sd_id128_get_machine(machine); |
| |
| r = sd_bus_message_new_method_call( |
| bus, |
| &m, |
| name, |
| "/", |
| "org.freedesktop.DBus.Peer", |
| "GetMachineId"); |
| if (r < 0) |
| return r; |
| |
| r = sd_bus_message_set_auto_start(m, false); |
| if (r < 0) |
| return r; |
| |
| r = sd_bus_call(bus, m, 0, NULL, &reply); |
| if (r < 0) |
| return r; |
| |
| r = sd_bus_message_read(reply, "s", &mid); |
| if (r < 0) |
| return r; |
| |
| return sd_id128_from_string(mid, machine); |
| } |
