diff options
Diffstat (limited to 'src/core/dbus-util.c')
| -rw-r--r-- | src/core/dbus-util.c | 262 |
1 files changed, 262 insertions, 0 deletions
diff --git a/src/core/dbus-util.c b/src/core/dbus-util.c new file mode 100644 index 0000000..ea044b5 --- /dev/null +++ b/src/core/dbus-util.c @@ -0,0 +1,262 @@ +/* SPDX-License-Identifier: LGPL-2.1-or-later */ + +#include "bus-polkit.h" +#include "bus-util.h" +#include "dbus-util.h" +#include "escape.h" +#include "parse-util.h" +#include "path-util.h" +#include "unit-printf.h" +#include "user-util.h" +#include "unit.h" + +int bus_property_get_triggered_unit( + sd_bus *bus, + const char *path, + const char *interface, + const char *property, + sd_bus_message *reply, + void *userdata, + sd_bus_error *error) { + + Unit *u = userdata, *trigger; + + assert(bus); + assert(reply); + assert(u); + + trigger = UNIT_TRIGGER(u); + + return sd_bus_message_append(reply, "s", trigger ? trigger->id : NULL); +} + +BUS_DEFINE_SET_TRANSIENT(mode_t, "u", uint32_t, mode_t, "%04o"); +BUS_DEFINE_SET_TRANSIENT(unsigned, "u", uint32_t, unsigned, "%" PRIu32); + +static inline bool valid_user_group_name_or_id_relaxed(const char *u) { + return valid_user_group_name(u, VALID_USER_ALLOW_NUMERIC|VALID_USER_RELAX); +} + +BUS_DEFINE_SET_TRANSIENT_STRING_WITH_CHECK(user_relaxed, valid_user_group_name_or_id_relaxed); +BUS_DEFINE_SET_TRANSIENT_STRING_WITH_CHECK(path, path_is_absolute); + +int bus_set_transient_string( + Unit *u, + const char *name, + char **p, + sd_bus_message *message, + UnitWriteFlags flags, + sd_bus_error *error) { + + const char *v; + int r; + + assert(p); + + r = sd_bus_message_read(message, "s", &v); + if (r < 0) + return r; + + if (!UNIT_WRITE_FLAGS_NOOP(flags)) { + r = free_and_strdup(p, empty_to_null(v)); + if (r < 0) + return r; + + unit_write_settingf(u, flags|UNIT_ESCAPE_SPECIFIERS, name, + "%s=%s", name, strempty(v)); + } + + return 1; +} + +int bus_set_transient_bool( + Unit *u, + const char *name, + bool *p, + sd_bus_message *message, + UnitWriteFlags flags, + sd_bus_error *error) { + + int v, r; + + assert(p); + + r = sd_bus_message_read(message, "b", &v); + if (r < 0) + return r; + + if (!UNIT_WRITE_FLAGS_NOOP(flags)) { + *p = v; + unit_write_settingf(u, flags, name, "%s=%s", name, yes_no(v)); + } + + return 1; +} + +int bus_set_transient_usec_internal( + Unit *u, + const char *name, + usec_t *p, + bool fix_0, + sd_bus_message *message, + UnitWriteFlags flags, + sd_bus_error *error) { + + uint64_t v; + int r; + + assert(p); + + r = sd_bus_message_read(message, "t", &v); + if (r < 0) + return r; + + if (!UNIT_WRITE_FLAGS_NOOP(flags)) { + if (fix_0) + *p = v != 0 ? v: USEC_INFINITY; + else + *p = v; + + char *n = strndupa_safe(name, strlen(name) - 4); + unit_write_settingf(u, flags, name, "%sSec=%s", n, FORMAT_TIMESPAN(v, USEC_PER_MSEC)); + } + + return 1; +} + +int bus_verify_manage_units_async_full( + Unit *u, + const char *verb, + int capability, + const char *polkit_message, + bool interactive, + sd_bus_message *call, + sd_bus_error *error) { + + const char *details[9] = { + "unit", u->id, + "verb", verb, + }; + + if (polkit_message) { + details[4] = "polkit.message"; + details[5] = polkit_message; + details[6] = "polkit.gettext_domain"; + details[7] = GETTEXT_PACKAGE; + } + + return bus_verify_polkit_async( + call, + capability, + "org.freedesktop.systemd1.manage-units", + details, + interactive, + UID_INVALID, + &u->manager->polkit_registry, + error); +} + +/* ret_format_str is an accumulator, so if it has any pre-existing content, new options will be appended to it */ +int bus_read_mount_options( + sd_bus_message *message, + sd_bus_error *error, + MountOptions **ret_options, + char **ret_format_str, + const char *separator) { + + _cleanup_(mount_options_free_allp) MountOptions *options = NULL; + _cleanup_free_ char *format_str = NULL; + const char *mount_options, *partition; + int r; + + assert(message); + assert(ret_options); + assert(separator); + + r = sd_bus_message_enter_container(message, 'a', "(ss)"); + if (r < 0) + return r; + + while ((r = sd_bus_message_read(message, "(ss)", &partition, &mount_options)) > 0) { + _cleanup_free_ char *escaped = NULL; + _cleanup_free_ MountOptions *o = NULL; + PartitionDesignator partition_designator; + + if (chars_intersect(mount_options, WHITESPACE)) + return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, + "Invalid mount options string, contains whitespace character(s): %s", mount_options); + + partition_designator = partition_designator_from_string(partition); + if (partition_designator < 0) + return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid partition name %s", partition); + + /* Need to store the options with the escapes, so that they can be parsed again */ + escaped = shell_escape(mount_options, ":"); + if (!escaped) + return -ENOMEM; + + if (!strextend_with_separator(&format_str, separator, partition, ":", escaped)) + return -ENOMEM; + + o = new(MountOptions, 1); + if (!o) + return -ENOMEM; + *o = (MountOptions) { + .partition_designator = partition_designator, + .options = strdup(mount_options), + }; + if (!o->options) + return -ENOMEM; + LIST_APPEND(mount_options, options, TAKE_PTR(o)); + } + if (r < 0) + return r; + + r = sd_bus_message_exit_container(message); + if (r < 0) + return r; + + if (options) { + if (ret_format_str) { + char *final = strjoin(*ret_format_str, !isempty(*ret_format_str) ? separator : "", format_str); + if (!final) + return -ENOMEM; + free_and_replace(*ret_format_str, final); + } + LIST_JOIN(mount_options, *ret_options, options); + } + + return 0; +} + +int bus_property_get_activation_details( + sd_bus *bus, + const char *path, + const char *interface, + const char *property, + sd_bus_message *reply, + void *userdata, + sd_bus_error *error) { + + ActivationDetails **details = ASSERT_PTR(userdata); + _cleanup_strv_free_ char **pairs = NULL; + int r; + + assert(reply); + + r = activation_details_append_pair(*details, &pairs); + if (r < 0) + return r; + + r = sd_bus_message_open_container(reply, 'a', "(ss)"); + if (r < 0) + return r; + + STRV_FOREACH_PAIR(key, value, pairs) { + r = sd_bus_message_append(reply, "(ss)", *key, *value); + if (r < 0) + return r; + } + + return sd_bus_message_close_container(reply); +} |