diff options
Diffstat (limited to 'src/libsystemd-bus/bus-control.c')
| -rw-r--r-- | src/libsystemd-bus/bus-control.c | 378 |
1 files changed, 378 insertions, 0 deletions
diff --git a/src/libsystemd-bus/bus-control.c b/src/libsystemd-bus/bus-control.c new file mode 100644 index 0000000000..a4dc9bf511 --- /dev/null +++ b/src/libsystemd-bus/bus-control.c @@ -0,0 +1,378 @@ +/*-*- 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/>. +***/ + +#ifdef HAVE_VALGRIND_MEMCHECK_H +#include <valgrind/memcheck.h> +#endif + +#include <stddef.h> +#include <errno.h> + +#include "strv.h" + +#include "sd-bus.h" +#include "bus-internal.h" +#include "bus-message.h" +#include "bus-control.h" + +int sd_bus_get_unique_name(sd_bus *bus, const char **unique) { + int r; + + if (!bus) + return -EINVAL; + if (!unique) + return -EINVAL; + + r = bus_ensure_running(bus); + if (r < 0) + return r; + + *unique = bus->unique_name; + return 0; +} + +int sd_bus_request_name(sd_bus *bus, const char *name, int flags) { + _cleanup_bus_message_unref_ sd_bus_message *reply = NULL; + uint32_t ret; + int r; + + if (!bus) + return -EINVAL; + if (!name) + return -EINVAL; + if (!bus->bus_client) + return -EINVAL; + + if (bus->is_kernel) { + struct kdbus_cmd_name *n; + size_t l; + + l = strlen(name); + n = alloca0(offsetof(struct kdbus_cmd_name, name) + l + 1); + n->size = offsetof(struct kdbus_cmd_name, name) + l + 1; + n->name_flags = flags; + memcpy(n->name, name, l+1); + +#ifdef HAVE_VALGRIND_MEMCHECK_H + VALGRIND_MAKE_MEM_DEFINED(n, n->size); +#endif + + r = ioctl(bus->input_fd, KDBUS_CMD_NAME_ACQUIRE, n); + if (r < 0) + return -errno; + + return n->name_flags; + } else { + r = sd_bus_call_method( + bus, + "org.freedesktop.DBus", + "/", + "org.freedesktop.DBus", + "RequestName", + NULL, + &reply, + "su", + name, + flags); + if (r < 0) + return r; + + r = sd_bus_message_read(reply, "u", &ret); + if (r < 0) + return r; + + return ret; + } +} + +int sd_bus_release_name(sd_bus *bus, const char *name) { + _cleanup_bus_message_unref_ sd_bus_message *reply = NULL; + uint32_t ret; + int r; + + if (!bus) + return -EINVAL; + if (!name) + return -EINVAL; + if (!bus->bus_client) + return -EINVAL; + + if (bus->is_kernel) { + struct kdbus_cmd_name *n; + size_t l; + + l = strlen(name); + n = alloca0(offsetof(struct kdbus_cmd_name, name) + l + 1); + n->size = offsetof(struct kdbus_cmd_name, name) + l + 1; + memcpy(n->name, name, l+1); + +#ifdef HAVE_VALGRIND_MEMCHECK_H + VALGRIND_MAKE_MEM_DEFINED(n, n->size); +#endif + r = ioctl(bus->input_fd, KDBUS_CMD_NAME_RELEASE, n); + if (r < 0) + return -errno; + + return n->name_flags; + } else { + r = sd_bus_call_method( + bus, + "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; + } + + return ret; +} + +int sd_bus_list_names(sd_bus *bus, char ***l) { + _cleanup_bus_message_unref_ sd_bus_message *reply1 = NULL, *reply2 = NULL; + char **x = NULL; + int r; + + if (!bus) + return -EINVAL; + if (!l) + return -EINVAL; + + r = sd_bus_call_method( + bus, + "org.freedesktop.DBus", + "/", + "org.freedesktop.DBus", + "ListNames", + NULL, + &reply1, + NULL); + if (r < 0) + return r; + + r = sd_bus_call_method( + bus, + "org.freedesktop.DBus", + "/", + "org.freedesktop.DBus", + "ListActivatableNames", + NULL, + &reply2, + NULL); + if (r < 0) + return r; + + r = bus_message_read_strv_extend(reply1, &x); + if (r < 0) { + strv_free(x); + return r; + } + + r = bus_message_read_strv_extend(reply2, &x); + if (r < 0) { + strv_free(x); + return r; + } + + *l = strv_uniq(x); + return 0; +} + +int sd_bus_get_owner(sd_bus *bus, const char *name, char **owner) { + _cleanup_bus_message_unref_ sd_bus_message *reply = NULL; + const char *found; + int r; + + if (!bus) + return -EINVAL; + if (!name) + return -EINVAL; + + r = sd_bus_call_method( + bus, + "org.freedesktop.DBus", + "/", + "org.freedesktop.DBus", + "GetNameOwner", + NULL, + &reply, + "s", + name); + if (r < 0) + return r; + + 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) { + _cleanup_bus_message_unref_ sd_bus_message *reply = NULL; + uint32_t u; + int r; + + if (!bus) + return -EINVAL; + if (!name) + return -EINVAL; + if (!uid) + return -EINVAL; + + r = sd_bus_call_method( + bus, + "org.freedesktop.DBus", + "/", + "org.freedesktop.DBus", + "GetConnectionUnixUser", + NULL, + &reply, + "s", + name); + if (r < 0) + return r; + + r = sd_bus_message_read(reply, "u", &u); + if (r < 0) + return r; + + *uid = (uid_t) u; + return 0; +} + +int sd_bus_get_owner_pid(sd_bus *bus, const char *name, pid_t *pid) { + _cleanup_bus_message_unref_ sd_bus_message *reply = NULL; + uint32_t u; + int r; + + if (!bus) + return -EINVAL; + if (!name) + return -EINVAL; + if (!pid) + return -EINVAL; + + r = sd_bus_call_method( + bus, + "org.freedesktop.DBus", + "/", + "org.freedesktop.DBus", + "GetConnectionUnixProcessID", + NULL, + &reply, + "s", + name); + if (r < 0) + return r; + + r = sd_bus_message_read(reply, "u", &u); + if (r < 0) + return r; + + if (u == 0) + return -EIO; + + *pid = (uid_t) u; + return 0; +} + +int bus_add_match_internal(sd_bus *bus, const char *match) { + assert(bus); + assert(match); + + return sd_bus_call_method( + bus, + "org.freedesktop.DBus", + "/", + "org.freedesktop.DBus", + "AddMatch", + NULL, + NULL, + "s", + match); +} + +int bus_remove_match_internal(sd_bus *bus, const char *match) { + assert(bus); + assert(match); + + return sd_bus_call_method( + bus, + "org.freedesktop.DBus", + "/", + "org.freedesktop.DBus", + "RemoveMatch", + NULL, + NULL, + "s", + match); +} + +int sd_bus_get_owner_machine_id(sd_bus *bus, const char *name, sd_id128_t *machine) { + _cleanup_bus_message_unref_ sd_bus_message *reply = NULL; + const char *mid; + int r; + + if (!bus) + return -EINVAL; + if (!name) + return -EINVAL; + + if (streq_ptr(name, bus->unique_name)) + return sd_id128_get_machine(machine); + + r = sd_bus_call_method(bus, + name, + "/", + "org.freedesktop.DBus.Peer", + "GetMachineId", + NULL, + &reply, + NULL); + + 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); +} |