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 int automount_init(Unit *u, UnitLoadState *new_state) {
  30         int r;
  31         Automount *a = AUTOMOUNT(u);
  32
  33         assert(a);
  34
  35         exec_context_init(&a->exec_context);
  36
  37         /* Load a .automount file */
  38         if ((r = unit_load_fragment(u, new_state)) < 0)
  39                 return r;
  40
  41         if (*new_state == UNIT_STUB)
  42                 *new_state = UNIT_LOADED;
  43
  44         /* Load drop-in directory data */
  45         if ((r = unit_load_dropin(unit_follow_merge(u))) < 0)
  46                 return r;
  47
  48         if (*new_state == UNIT_LOADED) {
  49
  50                 if ((r = unit_add_dependency(u, UNIT_BEFORE, UNIT(a->mount))) < 0)
  51                         return r;
  52
  53                 if ((r = unit_add_exec_dependencies(u, &a->exec_context)) < 0)
  54                         return r;
  55
  56                 if ((r = unit_add_default_cgroup(u)) < 0)
  57                         return r;
  58         }
  59
  60         return 0;
  61 }
  62
  63 static void automount_done(Unit *u) {
  64         Automount *d = AUTOMOUNT(u);
  65
  66         assert(d);
  67         free(d->path);
  68 }
  69
  70 static void automount_dump(Unit *u, FILE *f, const char *prefix) {
  71
  72         static const char* const state_table[_AUTOMOUNT_STATE_MAX] = {
  73                 [AUTOMOUNT_DEAD] = "dead",
  74                 [AUTOMOUNT_START_PRE] = "start-pre",
  75                 [AUTOMOUNT_START_POST] = "start-post",
  76                 [AUTOMOUNT_WAITING] = "waiting",
  77                 [AUTOMOUNT_RUNNING] = "running",
  78                 [AUTOMOUNT_STOP_PRE] = "stop-pre",
  79                 [AUTOMOUNT_STOP_POST] = "stop-post",
  80                 [AUTOMOUNT_MAINTAINANCE] = "maintainance"
  81         };
  82
  83         static const char* const command_table[_AUTOMOUNT_EXEC_MAX] = {
  84                 [AUTOMOUNT_EXEC_START_PRE] = "StartPre",
  85                 [AUTOMOUNT_EXEC_START_POST] = "StartPost",
  86                 [AUTOMOUNT_EXEC_STOP_PRE] = "StopPre",
  87                 [AUTOMOUNT_EXEC_STOP_POST] = "StopPost"
  88         };
  89
  90         AutomountExecCommand c;
  91         Automount *s = AUTOMOUNT(u);
  92
  93         assert(s);
  94
  95         fprintf(f,
  96                 "%sAutomount State: %s\n"
  97                 "%sPath: %s\n",
  98                 prefix, state_table[s->state],
  99                 prefix, s->path);
 100
 101         exec_context_dump(&s->exec_context, f, prefix);
 102
 103         for (c = 0; c < _AUTOMOUNT_EXEC_MAX; c++) {
 104                 ExecCommand *i;
 105
 106                 LIST_FOREACH(command, i, s->exec_command[c])
 107                         fprintf(f, "%s%s: %s\n", prefix, command_table[c], i->path);
 108         }
 109 }
 110
 111 static UnitActiveState automount_active_state(Unit *u) {
 112
 113         static const UnitActiveState table[_AUTOMOUNT_STATE_MAX] = {
 114                 [AUTOMOUNT_DEAD] = UNIT_INACTIVE,
 115                 [AUTOMOUNT_START_PRE] = UNIT_ACTIVATING,
 116                 [AUTOMOUNT_START_POST] = UNIT_ACTIVATING,
 117                 [AUTOMOUNT_WAITING] = UNIT_ACTIVE,
 118                 [AUTOMOUNT_RUNNING] = UNIT_ACTIVE,
 119                 [AUTOMOUNT_STOP_PRE] = UNIT_DEACTIVATING,
 120                 [AUTOMOUNT_STOP_POST] = UNIT_DEACTIVATING,
 121                 [AUTOMOUNT_MAINTAINANCE] = UNIT_INACTIVE,
 122         };
 123
 124         return table[AUTOMOUNT(u)->state];
 125 }
 126
 127 const UnitVTable automount_vtable = {
 128         .suffix = ".mount",
 129
 130         .init = automount_init,
 131         .done = automount_done,
 132
 133         .dump = automount_dump,
 134
 135         .active_state = automount_active_state
 136 };