git.ozlabs.org Git - ccan/blob - ccan/tdb2/test/run-83-openhook.c

   1 #include "tdb2-source.h"
   2 #include <ccan/tap/tap.h>
   3 #include <stdlib.h>
   4 #include <stdbool.h>
   5 #include <stdarg.h>
   6 #include <err.h>
   7 #include "external-agent.h"
   8 #include "logging.h"
   9
  10 static enum TDB_ERROR clear_if_first(int fd, void *arg)
  11 {
  12 /* We hold a lock offset 63 always, so we can tell if anyone is holding it. */
  13         struct flock fl;
  14
  15         if (arg != clear_if_first)
  16                 return TDB_ERR_CORRUPT;
  17
  18         fl.l_type = F_WRLCK;
  19         fl.l_whence = SEEK_SET;
  20         fl.l_start = 63;
  21         fl.l_len = 1;
  22
  23         if (fcntl(fd, F_SETLK, &fl) == 0) {
  24                 /* We must be first ones to open it! */
  25                 diag("truncating file!");
  26                 if (ftruncate(fd, 0) != 0) {
  27                         return TDB_ERR_IO;
  28                 }
  29         }
  30         fl.l_type = F_RDLCK;
  31         if (fcntl(fd, F_SETLKW, &fl) != 0) {
  32                 return TDB_ERR_IO;
  33         }
  34         return TDB_SUCCESS;
  35 }
  36
  37 int main(int argc, char *argv[])
  38 {
  39         unsigned int i;
  40         struct tdb_context *tdb;
  41         struct agent *agent;
  42         union tdb_attribute cif;
  43         struct tdb_data key = tdb_mkdata("key", 3);
  44         int flags[] = { TDB_DEFAULT, TDB_NOMMAP,
  45                         TDB_CONVERT, TDB_NOMMAP|TDB_CONVERT };
  46
  47         cif.openhook.base.attr = TDB_ATTRIBUTE_OPENHOOK;
  48         cif.openhook.base.next = &tap_log_attr;
  49         cif.openhook.fn = clear_if_first;
  50         cif.openhook.data = clear_if_first;
  51
  52         agent = prepare_external_agent();
  53         plan_tests(sizeof(flags) / sizeof(flags[0]) * 13);
  54         for (i = 0; i < sizeof(flags) / sizeof(flags[0]); i++) {
  55                 /* Create it */
  56                 tdb = tdb_open("run-83-openhook.tdb", flags[i],
  57                                O_RDWR|O_CREAT|O_TRUNC, 0600, NULL);
  58                 ok1(tdb);
  59                 ok1(tdb_store(tdb, key, key, TDB_REPLACE) == 0);
  60                 tdb_close(tdb);
  61
  62                 /* Now, open with CIF, should clear it. */
  63                 tdb = tdb_open("run-83-openhook.tdb", flags[i],
  64                                O_RDWR, 0, &cif);
  65                 ok1(tdb);
  66                 ok1(!tdb_exists(tdb, key));
  67                 ok1(tdb_store(tdb, key, key, TDB_REPLACE) == 0);
  68
  69                 /* Agent should not clear it, since it's still open. */
  70                 ok1(external_agent_operation(agent, OPEN_WITH_HOOK,
  71                                              "run-83-openhook.tdb") == SUCCESS);
  72                 ok1(external_agent_operation(agent, FETCH, "key") == SUCCESS);
  73                 ok1(external_agent_operation(agent, CLOSE, "") == SUCCESS);
  74
  75                 /* Still exists for us too. */
  76                 ok1(tdb_exists(tdb, key));
  77
  78                 /* Close it, now agent should clear it. */
  79                 tdb_close(tdb);
  80
  81                 ok1(external_agent_operation(agent, OPEN_WITH_HOOK,
  82                                              "run-83-openhook.tdb") == SUCCESS);
  83                 ok1(external_agent_operation(agent, FETCH, "key") == FAILED);
  84                 ok1(external_agent_operation(agent, CLOSE, "") == SUCCESS);
  85
  86                 ok1(tap_log_messages == 0);
  87         }
  88
  89         free_external_agent(agent);
  90         return exit_status();
  91 }
  92