service.c

   1 /*-*- Mode: C; c-basic-offset: 8 -*-*/
   2
   3 #include <errno.h>
   4
   5 #include "name.h"
   6 #include "service.h"
   7 #include "load-fragment.h"
   8 #include "load-dropin.h"
   9
  10 static int service_load_sysv(Service *s) {
  11         assert(s);
  12
  13         /* Load service data from SysV init scripts, preferably with
  14          * LSB headers ... */
  15
  16         return -ENOENT;
  17 }
  18
  19 static int service_load(Name *n) {
  20         int r;
  21         Service *s = SERVICE(n);
  22
  23         assert(s);
  24
  25         exec_context_defaults(&s->exec_context);
  26
  27         /* Load a .service file */
  28         r = name_load_fragment(n);
  29
  30         /* Load a classic init script as a fallback */
  31         if (r == -ENOENT)
  32                 r = service_load_sysv(s);
  33
  34         if (r < 0)
  35                 return r;
  36
  37         /* Load dropin directory data */
  38         if ((r = name_load_dropin(n)) < 0)
  39                 return r;
  40
  41         return 0;
  42 }
  43
  44 static void service_dump(Name *n, FILE *f, const char *prefix) {
  45
  46         static const char* const state_table[_SERVICE_STATE_MAX] = {
  47                 [SERVICE_DEAD] = "dead",
  48                 [SERVICE_START_PRE] = "start-pre",
  49                 [SERVICE_START] = "start",
  50                 [SERVICE_START_POST] = "post",
  51                 [SERVICE_RUNNING] = "running",
  52                 [SERVICE_RELOAD_PRE] = "reload-pre",
  53                 [SERVICE_RELOAD] = "reload",
  54                 [SERVICE_RELOAD_POST] = "reload-post",
  55                 [SERVICE_STOP_PRE] = "stop-pre",
  56                 [SERVICE_STOP] = "stop",
  57                 [SERVICE_SIGTERM] = "sigterm",
  58                 [SERVICE_SIGKILL] = "sigkill",
  59                 [SERVICE_STOP_POST] = "stop-post",
  60                 [SERVICE_MAINTAINANCE] = "maintainance"
  61         };
  62
  63         static const char* const command_table[_SERVICE_EXEC_MAX] = {
  64                 [SERVICE_EXEC_START_PRE] = "StartPre",
  65                 [SERVICE_EXEC_START] = "Start",
  66                 [SERVICE_EXEC_START_POST] = "StartPost",
  67                 [SERVICE_EXEC_RELOAD_PRE] = "ReloadPre",
  68                 [SERVICE_EXEC_RELOAD] = "Reload",
  69                 [SERVICE_EXEC_RELOAD_POST] = "ReloadPost",
  70                 [SERVICE_EXEC_STOP_PRE] = "StopPre",
  71                 [SERVICE_EXEC_STOP] = "Stop",
  72                 [SERVICE_EXEC_STOP_POST] = "StopPost",
  73         };
  74
  75         ServiceExecCommand c;
  76         Service *s = SERVICE(n);
  77
  78         assert(s);
  79
  80         fprintf(f,
  81                 "%sService State: %s\n",
  82                 prefix, state_table[s->state]);
  83
  84         exec_context_dump(&s->exec_context, f, prefix);
  85
  86         for (c = 0; c < _SERVICE_EXEC_MAX; c++) {
  87                 ExecCommand *i;
  88
  89                 LIST_FOREACH(i, s->exec_command[c])
  90                         fprintf(f, "%s%s: %s\n", prefix, command_table[c], i->path);
  91         }
  92 }
  93
  94 static int service_set_state(Service *s, ServiceState state) {
  95         assert(s);
  96
  97         s->state = state;
  98         return 0;
  99 }
 100
 101 static int service_start(Name *n) {
 102         Service *s = SERVICE(n);
 103
 104         assert(s);
 105
 106         /* We cannot fulfill this request right now */
 107         if (s->state == SERVICE_STOP_PRE ||
 108             s->state == SERVICE_STOP ||
 109             s->state == SERVICE_SIGTERM ||
 110             s->state == SERVICE_SIGKILL ||
 111             s->state == SERVICE_STOP_POST)
 112                 return -EAGAIN;
 113
 114         assert(s->state == SERVICE_DEAD || s->state == SERVICE_MAINTAINANCE);
 115
 116         return service_set_state(s, SERVICE_START_PRE);
 117 }
 118
 119 static int service_stop(Name *n) {
 120         Service *s = SERVICE(n);
 121
 122         assert(s);
 123
 124
 125         return 0;
 126 }
 127
 128 static int service_reload(Name *n) {
 129         return 0;
 130 }
 131
 132 static NameActiveState service_active_state(Name *n) {
 133
 134         static const NameActiveState table[_SERVICE_STATE_MAX] = {
 135                 [SERVICE_DEAD] = NAME_INACTIVE,
 136                 [SERVICE_START_PRE] = NAME_ACTIVATING,
 137                 [SERVICE_START] = NAME_ACTIVATING,
 138                 [SERVICE_START_POST] = NAME_ACTIVATING,
 139                 [SERVICE_RUNNING] = NAME_ACTIVE,
 140                 [SERVICE_RELOAD_PRE] = NAME_ACTIVE_RELOADING,
 141                 [SERVICE_RELOAD] = NAME_ACTIVE_RELOADING,
 142                 [SERVICE_RELOAD_POST] = NAME_ACTIVE_RELOADING,
 143                 [SERVICE_STOP_PRE] = NAME_DEACTIVATING,
 144                 [SERVICE_STOP] = NAME_DEACTIVATING,
 145                 [SERVICE_SIGTERM] = NAME_DEACTIVATING,
 146                 [SERVICE_SIGKILL] = NAME_DEACTIVATING,
 147                 [SERVICE_STOP_POST] = NAME_DEACTIVATING,
 148                 [SERVICE_MAINTAINANCE] = NAME_INACTIVE,
 149         };
 150
 151         return table[SERVICE(n)->state];
 152 }
 153
 154 static void service_free_hook(Name *n) {
 155         Service *s = SERVICE(n);
 156         unsigned c;
 157
 158         assert(s);
 159
 160         exec_context_free(&s->exec_context);
 161
 162         for (c = 0; c < _SERVICE_EXEC_MAX; c++)
 163                 exec_command_free_list(s->exec_command[c]);
 164
 165         if (s->socket)
 166                 s->socket->service = NULL;
 167 }
 168
 169 const NameVTable service_vtable = {
 170         .suffix = ".service",
 171
 172         .load = service_load,
 173         .dump = service_dump,
 174
 175         .start = service_start,
 176         .stop = service_stop,
 177         .reload = service_reload,
 178
 179         .active_state = service_active_state,
 180
 181         .free_hook = service_free_hook
 182 };