git.ozlabs.org Git - ccan/blob - ccan/ntdb/test/api-83-openhook.c

   1 #include "config.h"
   2 #include "ntdb.h"
   3 #include "private.h"
   4 #include "tap-interface.h"
   5 #include "external-agent.h"
   6 #include "logging.h"
   7
   8 #define KEY_STR "key"
   9
  10 static enum NTDB_ERROR clear_if_first(int fd, void *arg)
  11 {
  12 /* We hold a lock offset 4 always, so we can tell if anyone is holding it.
  13  * (This is compatible with tdb's TDB_CLEAR_IF_FIRST flag).  */
  14         struct flock fl;
  15
  16         if (arg != clear_if_first)
  17                 return NTDB_ERR_CORRUPT;
  18
  19         fl.l_type = F_WRLCK;
  20         fl.l_whence = SEEK_SET;
  21         fl.l_start = 4;
  22         fl.l_len = 1;
  23
  24         if (fcntl(fd, F_SETLK, &fl) == 0) {
  25                 /* We must be first ones to open it! */
  26                 diag("truncating file!");
  27                 if (ftruncate(fd, 0) != 0) {
  28                         return NTDB_ERR_IO;
  29                 }
  30         }
  31         fl.l_type = F_RDLCK;
  32         if (fcntl(fd, F_SETLKW, &fl) != 0) {
  33                 return NTDB_ERR_IO;
  34         }
  35         return NTDB_SUCCESS;
  36 }
  37
  38 int main(int argc, char *argv[])
  39 {
  40         unsigned int i;
  41         struct ntdb_context *ntdb, *ntdb2;
  42         struct agent *agent;
  43         union ntdb_attribute cif;
  44         NTDB_DATA key = ntdb_mkdata(KEY_STR, strlen(KEY_STR));
  45         int flags[] = { NTDB_DEFAULT, NTDB_NOMMAP,
  46                         NTDB_CONVERT, NTDB_NOMMAP|NTDB_CONVERT };
  47
  48         cif.openhook.base.attr = NTDB_ATTRIBUTE_OPENHOOK;
  49         cif.openhook.base.next = &tap_log_attr;
  50         cif.openhook.fn = clear_if_first;
  51         cif.openhook.data = clear_if_first;
  52
  53         agent = prepare_external_agent();
  54         plan_tests(sizeof(flags) / sizeof(flags[0]) * 16);
  55         for (i = 0; i < sizeof(flags) / sizeof(flags[0]); i++) {
  56                 /* Create it */
  57                 ntdb = ntdb_open("run-83-openhook.ntdb", flags[i]|MAYBE_NOSYNC,
  58                                  O_RDWR|O_CREAT|O_TRUNC, 0600, NULL);
  59                 ok1(ntdb);
  60                 ok1(ntdb_store(ntdb, key, key, NTDB_REPLACE) == 0);
  61                 ntdb_close(ntdb);
  62
  63                 /* Now, open with CIF, should clear it. */
  64                 ntdb = ntdb_open("run-83-openhook.ntdb", flags[i]|MAYBE_NOSYNC,
  65                                  O_RDWR, 0, &cif);
  66                 ok1(ntdb);
  67                 ok1(!ntdb_exists(ntdb, key));
  68                 ok1(ntdb_store(ntdb, key, key, NTDB_REPLACE) == 0);
  69
  70                 /* Agent should not clear it, since it's still open. */
  71                 ok1(external_agent_operation(agent, OPEN_WITH_HOOK,
  72                                              "run-83-openhook.ntdb") == SUCCESS);
  73                 ok1(external_agent_operation(agent, FETCH, KEY_STR "=" KEY_STR)
  74                     == SUCCESS);
  75                 ok1(external_agent_operation(agent, CLOSE, "") == SUCCESS);
  76
  77                 /* Still exists for us too. */
  78                 ok1(ntdb_exists(ntdb, key));
  79
  80                 /* Nested open should not erase db. */
  81                 ntdb2 = ntdb_open("run-83-openhook.ntdb", flags[i]|MAYBE_NOSYNC,
  82                                   O_RDWR, 0, &cif);
  83                 ok1(ntdb_exists(ntdb2, key));
  84                 ok1(ntdb_exists(ntdb, key));
  85                 ntdb_close(ntdb2);
  86
  87                 ok1(ntdb_exists(ntdb, key));
  88
  89                 /* Close it, now agent should clear it. */
  90                 ntdb_close(ntdb);
  91
  92                 ok1(external_agent_operation(agent, OPEN_WITH_HOOK,
  93                                              "run-83-openhook.ntdb") == SUCCESS);
  94                 ok1(external_agent_operation(agent, FETCH, KEY_STR "=" KEY_STR)
  95                     == FAILED);
  96                 ok1(external_agent_operation(agent, CLOSE, "") == SUCCESS);
  97
  98                 ok1(tap_log_messages == 0);
  99         }
 100
 101         free_external_agent(agent);
 102         return exit_status();
 103 }