src/systemd/sd-device.h

   1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
   2 #ifndef foosddevicehfoo
   3 #define foosddevicehfoo
   4
   5 /***
   6   systemd is free software; you can redistribute it and/or modify it
   7   under the terms of the GNU Lesser General Public License as published by
   8   the Free Software Foundation; either version 2.1 of the License, or
   9   (at your option) any later version.
  10
  11   systemd is distributed in the hope that it will be useful, but
  12   WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14   Lesser General Public License for more details.
  15
  16   You should have received a copy of the GNU Lesser General Public License
  17   along with systemd; If not, see <https://www.gnu.org/licenses/>.
  18 ***/
  19
  20 #include <errno.h>
  21 #include <inttypes.h>
  22 #include <sys/stat.h>
  23 #include <sys/sysmacros.h>
  24 #include <sys/types.h>
  25
  26 #include "sd-event.h"
  27 #include "sd-id128.h"
  28
  29 #include "_sd-common.h"
  30
  31 _SD_BEGIN_DECLARATIONS;
  32
  33 typedef struct sd_device sd_device;
  34 typedef struct sd_device_enumerator sd_device_enumerator;
  35 typedef struct sd_device_monitor sd_device_monitor;
  36
  37 __extension__ typedef enum sd_device_action_t {
  38         SD_DEVICE_ADD,
  39         SD_DEVICE_REMOVE,
  40         SD_DEVICE_CHANGE,
  41         SD_DEVICE_MOVE,
  42         SD_DEVICE_ONLINE,
  43         SD_DEVICE_OFFLINE,
  44         SD_DEVICE_BIND,
  45         SD_DEVICE_UNBIND,
  46         _SD_DEVICE_ACTION_MAX,
  47         _SD_DEVICE_ACTION_INVALID = -EINVAL,
  48         _SD_ENUM_FORCE_S64(DEVICE_ACTION)
  49 } sd_device_action_t;
  50
  51 /* callback */
  52
  53 typedef int (*sd_device_monitor_handler_t)(sd_device_monitor *m, sd_device *device, void *userdata);
  54
  55 /* device */
  56
  57 sd_device *sd_device_ref(sd_device *device);
  58 sd_device *sd_device_unref(sd_device *device);
  59
  60 int sd_device_new_from_syspath(sd_device **ret, const char *syspath);
  61 int sd_device_new_from_devnum(sd_device **ret, char type, dev_t devnum);
  62 int sd_device_new_from_subsystem_sysname(sd_device **ret, const char *subsystem, const char *sysname);
  63 int sd_device_new_from_device_id(sd_device **ret, const char *id);
  64 int sd_device_new_from_stat_rdev(sd_device **ret, const struct stat *st);
  65 int sd_device_new_from_devname(sd_device **ret, const char *devname);
  66 int sd_device_new_from_path(sd_device **ret, const char *path);
  67 int sd_device_new_from_ifname(sd_device **ret, const char *ifname);
  68 int sd_device_new_from_ifindex(sd_device **ret, int ifindex);
  69
  70 int sd_device_new_child(sd_device **ret, sd_device *device, const char *suffix);
  71
  72 int sd_device_get_parent(sd_device *child, sd_device **ret);
  73 int sd_device_get_parent_with_subsystem_devtype(sd_device *child, const char *subsystem, const char *devtype, sd_device **ret);
  74
  75 int sd_device_get_syspath(sd_device *device, const char **ret);
  76 int sd_device_get_subsystem(sd_device *device, const char **ret);
  77 int sd_device_get_devtype(sd_device *device, const char **ret);
  78 int sd_device_get_devnum(sd_device *device, dev_t *devnum);
  79 int sd_device_get_ifindex(sd_device *device, int *ifindex);
  80 int sd_device_get_driver(sd_device *device, const char **ret);
  81 int sd_device_get_devpath(sd_device *device, const char **ret);
  82 int sd_device_get_devname(sd_device *device, const char **ret);
  83 int sd_device_get_sysname(sd_device *device, const char **ret);
  84 int sd_device_get_sysnum(sd_device *device, const char **ret);
  85 int sd_device_get_action(sd_device *device, sd_device_action_t *ret);
  86 int sd_device_get_seqnum(sd_device *device, uint64_t *ret);
  87 int sd_device_get_diskseq(sd_device *device, uint64_t *ret);
  88
  89 int sd_device_get_is_initialized(sd_device *device);
  90 int sd_device_get_usec_initialized(sd_device *device, uint64_t *ret);
  91 int sd_device_get_usec_since_initialized(sd_device *device, uint64_t *ret);
  92
  93 const char *sd_device_get_tag_first(sd_device *device);
  94 const char *sd_device_get_tag_next(sd_device *device);
  95 const char *sd_device_get_current_tag_first(sd_device *device);
  96 const char *sd_device_get_current_tag_next(sd_device *device);
  97 const char *sd_device_get_devlink_first(sd_device *device);
  98 const char *sd_device_get_devlink_next(sd_device *device);
  99 const char *sd_device_get_property_first(sd_device *device, const char **value);
 100 const char *sd_device_get_property_next(sd_device *device, const char **value);
 101 const char *sd_device_get_sysattr_first(sd_device *device);
 102 const char *sd_device_get_sysattr_next(sd_device *device);
 103 sd_device *sd_device_get_child_first(sd_device *device, const char **ret_suffix);
 104 sd_device *sd_device_get_child_next(sd_device *device, const char **ret_suffix);
 105
 106 int sd_device_has_tag(sd_device *device, const char *tag);
 107 int sd_device_has_current_tag(sd_device *device, const char *tag);
 108 int sd_device_get_property_value(sd_device *device, const char *key, const char **value);
 109 int sd_device_get_trigger_uuid(sd_device *device, sd_id128_t *ret);
 110 int sd_device_get_sysattr_value(sd_device *device, const char *sysattr, const char **_value);
 111
 112 int sd_device_set_sysattr_value(sd_device *device, const char *sysattr, const char *value);
 113 int sd_device_set_sysattr_valuef(sd_device *device, const char *sysattr, const char *format, ...) _sd_printf_(3, 4);
 114 int sd_device_trigger(sd_device *device, sd_device_action_t action);
 115 int sd_device_trigger_with_uuid(sd_device *device, sd_device_action_t action, sd_id128_t *ret_uuid);
 116 int sd_device_open(sd_device *device, int flags);
 117
 118 /* device enumerator */
 119
 120 int sd_device_enumerator_new(sd_device_enumerator **ret);
 121 sd_device_enumerator *sd_device_enumerator_ref(sd_device_enumerator *enumerator);
 122 sd_device_enumerator *sd_device_enumerator_unref(sd_device_enumerator *enumerator);
 123
 124 sd_device *sd_device_enumerator_get_device_first(sd_device_enumerator *enumerator);
 125 sd_device *sd_device_enumerator_get_device_next(sd_device_enumerator *enumerator);
 126 sd_device *sd_device_enumerator_get_subsystem_first(sd_device_enumerator *enumerator);
 127 sd_device *sd_device_enumerator_get_subsystem_next(sd_device_enumerator *enumerator);
 128
 129 int sd_device_enumerator_add_match_subsystem(sd_device_enumerator *enumerator, const char *subsystem, int match);
 130 int sd_device_enumerator_add_match_sysattr(sd_device_enumerator *enumerator, const char *sysattr, const char *value, int match);
 131 int sd_device_enumerator_add_match_property(sd_device_enumerator *enumerator, const char *property, const char *value);
 132 int sd_device_enumerator_add_match_sysname(sd_device_enumerator *enumerator, const char *sysname);
 133 int sd_device_enumerator_add_nomatch_sysname(sd_device_enumerator *enumerator, const char *sysname);
 134 int sd_device_enumerator_add_match_tag(sd_device_enumerator *enumerator, const char *tag);
 135 int sd_device_enumerator_add_match_parent(sd_device_enumerator *enumerator, sd_device *parent);
 136 int sd_device_enumerator_allow_uninitialized(sd_device_enumerator *enumerator);
 137
 138 /* device monitor */
 139
 140 int sd_device_monitor_new(sd_device_monitor **ret);
 141 sd_device_monitor *sd_device_monitor_ref(sd_device_monitor *m);
 142 sd_device_monitor *sd_device_monitor_unref(sd_device_monitor *m);
 143
 144 int sd_device_monitor_set_receive_buffer_size(sd_device_monitor *m, size_t size);
 145 int sd_device_monitor_attach_event(sd_device_monitor *m, sd_event *event);
 146 int sd_device_monitor_detach_event(sd_device_monitor *m);
 147 sd_event *sd_device_monitor_get_event(sd_device_monitor *m);
 148 sd_event_source *sd_device_monitor_get_event_source(sd_device_monitor *m);
 149 int sd_device_monitor_set_description(sd_device_monitor *m, const char *description);
 150 int sd_device_monitor_get_description(sd_device_monitor *m, const char **ret);
 151 int sd_device_monitor_start(sd_device_monitor *m, sd_device_monitor_handler_t callback, void *userdata);
 152 int sd_device_monitor_stop(sd_device_monitor *m);
 153
 154 int sd_device_monitor_filter_add_match_subsystem_devtype(sd_device_monitor *m, const char *subsystem, const char *devtype);
 155 int sd_device_monitor_filter_add_match_tag(sd_device_monitor *m, const char *tag);
 156 int sd_device_monitor_filter_add_match_sysattr(sd_device_monitor *m, const char *sysattr, const char *value, int match);
 157 int sd_device_monitor_filter_add_match_parent(sd_device_monitor *m, sd_device *device, int match);
 158 int sd_device_monitor_filter_update(sd_device_monitor *m);
 159 int sd_device_monitor_filter_remove(sd_device_monitor *m);
 160
 161 _SD_DEFINE_POINTER_CLEANUP_FUNC(sd_device, sd_device_unref);
 162 _SD_DEFINE_POINTER_CLEANUP_FUNC(sd_device_enumerator, sd_device_enumerator_unref);
 163 _SD_DEFINE_POINTER_CLEANUP_FUNC(sd_device_monitor, sd_device_monitor_unref);
 164
 165 _SD_END_DECLARATIONS;
 166
 167 #endif