automount.c

   1 /*-*- Mode: C; c-basic-offset: 8 -*-*/
   2
   3 /***
   4   This file is part of systemd.
   5
   6   Copyright 2010 Lennart Poettering
   7
   8   systemd is free software; you can redistribute it and/or modify it
   9   under the terms of the GNU General Public License as published by
  10   the Free Software Foundation; either version 2 of the License, or
  11   (at your option) any later version.
  12
  13   systemd is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   General Public License for more details.
  17
  18   You should have received a copy of the GNU General Public License
  19   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  20 ***/
  21
  22 #include <errno.h>
  23
  24 #include "unit.h"
  25 #include "automount.h"
  26 #include "load-fragment.h"
  27 #include "load-dropin.h"
  28
  29 static const UnitActiveState state_translation_table[_AUTOMOUNT_STATE_MAX] = {
  30         [AUTOMOUNT_DEAD] = UNIT_INACTIVE,
  31         [AUTOMOUNT_WAITING] = UNIT_ACTIVE,
  32         [AUTOMOUNT_RUNNING] = UNIT_ACTIVE,
  33         [AUTOMOUNT_MAINTAINANCE] = UNIT_INACTIVE,
  34 };
  35
  36 static const char* const state_string_table[_AUTOMOUNT_STATE_MAX] = {
  37         [AUTOMOUNT_DEAD] = "dead",
  38         [AUTOMOUNT_WAITING] = "waiting",
  39         [AUTOMOUNT_RUNNING] = "running",
  40         [AUTOMOUNT_MAINTAINANCE] = "maintainance"
  41 };
  42
  43 static void automount_init(Unit *u) {
  44         Automount *a = AUTOMOUNT(u);
  45
  46         a->state = 0;
  47         a->mount = NULL;
  48 }
  49
  50 static int automount_load(Unit *u) {
  51         int r;
  52         Automount *a = AUTOMOUNT(u);
  53
  54         assert(u);
  55         assert(u->meta.load_state == UNIT_STUB);
  56
  57         /* Load a .automount file */
  58         if ((r = unit_load_fragment_and_dropin_optional(u)) < 0)
  59                 return r;
  60
  61         if (u->meta.load_state == UNIT_LOADED) {
  62
  63                 if ((r = unit_load_related_unit(u, ".mount", (Unit**) &a->mount)) < 0)
  64                         return r;
  65
  66                 if ((r = unit_add_dependency(u, UNIT_BEFORE, UNIT(a->mount))) < 0)
  67                         return r;
  68         }
  69
  70         return 0;
  71 }
  72
  73 static void automount_done(Unit *u) {
  74         Automount *a = AUTOMOUNT(u);
  75
  76         assert(a);
  77
  78         a->mount = NULL;
  79 }
  80
  81 static void automount_dump(Unit *u, FILE *f, const char *prefix) {
  82         Automount *s = AUTOMOUNT(u);
  83
  84         assert(s);
  85
  86         fprintf(f,
  87                 "%sAutomount State: %s\n",
  88                 prefix, state_string_table[s->state]);
  89 }
  90
  91 static UnitActiveState automount_active_state(Unit *u) {
  92
  93         return state_translation_table[AUTOMOUNT(u)->state];
  94 }
  95
  96 static const char *automount_sub_state_to_string(Unit *u) {
  97         assert(u);
  98
  99         return state_string_table[AUTOMOUNT(u)->state];
 100 }
 101
 102 const UnitVTable automount_vtable = {
 103         .suffix = ".mount",
 104
 105         .no_alias = true,
 106
 107         .init = automount_init,
 108         .load = automount_load,
 109         .done = automount_done,
 110
 111         .dump = automount_dump,
 112
 113         .active_state = automount_active_state,
 114         .sub_state_to_string = automount_sub_state_to_string
 115 };