lib/tdb2/test/api-83-openhook.c

   1 #include <ccan/tdb2/tdb2.h>
   2 #include <ccan/tap/tap.h>
   3 #include <sys/types.h>
   4 #include <sys/stat.h>
   5 #include <fcntl.h>
   6 #include <stdlib.h>
   7 #include <stdbool.h>
   8 #include <stdarg.h>
   9 #include <err.h>
  10 #include <unistd.h>
  11 #include "external-agent.h"
  12 #include "logging.h"
  13
  14 static enum TDB_ERROR clear_if_first(int fd, void *arg)
  15 {
  16 /* We hold a lock offset 4 always, so we can tell if anyone is holding it.
  17  * (This is compatible with tdb1's TDB_CLEAR_IF_FIRST flag).  */
  18         struct flock fl;
  19
  20         if (arg != clear_if_first)
  21                 return TDB_ERR_CORRUPT;
  22
  23         fl.l_type = F_WRLCK;
  24         fl.l_whence = SEEK_SET;
  25         fl.l_start = 4;
  26         fl.l_len = 1;
  27
  28         if (fcntl(fd, F_SETLK, &fl) == 0) {
  29                 /* We must be first ones to open it! */
  30                 diag("truncating file!");
  31                 if (ftruncate(fd, 0) != 0) {
  32                         return TDB_ERR_IO;
  33                 }
  34         }
  35         fl.l_type = F_RDLCK;
  36         if (fcntl(fd, F_SETLKW, &fl) != 0) {
  37                 return TDB_ERR_IO;
  38         }
  39         return TDB_SUCCESS;
  40 }
  41
  42 int main(int argc, char *argv[])
  43 {
  44         unsigned int i;
  45         struct tdb_context *tdb;
  46         struct agent *agent;
  47         union tdb_attribute cif;
  48         struct tdb_data key = tdb_mkdata("key", 3);
  49         int flags[] = { TDB_DEFAULT, TDB_NOMMAP,
  50                         TDB_CONVERT, TDB_NOMMAP|TDB_CONVERT,
  51                         TDB_VERSION1, TDB_NOMMAP|TDB_VERSION1,
  52                         TDB_CONVERT|TDB_VERSION1,
  53                         TDB_NOMMAP|TDB_CONVERT|TDB_VERSION1 };
  54
  55         cif.openhook.base.attr = TDB_ATTRIBUTE_OPENHOOK;
  56         cif.openhook.base.next = &tap_log_attr;
  57         cif.openhook.fn = clear_if_first;
  58         cif.openhook.data = clear_if_first;
  59
  60         agent = prepare_external_agent();
  61         plan_tests(sizeof(flags) / sizeof(flags[0]) * 13);
  62         for (i = 0; i < sizeof(flags) / sizeof(flags[0]); i++) {
  63                 /* Create it */
  64                 tdb = tdb_open("run-83-openhook.tdb", flags[i],
  65                                O_RDWR|O_CREAT|O_TRUNC, 0600, NULL);
  66                 ok1(tdb);
  67                 ok1(tdb_store(tdb, key, key, TDB_REPLACE) == 0);
  68                 tdb_close(tdb);
  69
  70                 /* Now, open with CIF, should clear it. */
  71                 tdb = tdb_open("run-83-openhook.tdb", flags[i],
  72                                O_RDWR, 0, &cif);
  73                 ok1(tdb);
  74                 ok1(!tdb_exists(tdb, key));
  75                 ok1(tdb_store(tdb, key, key, TDB_REPLACE) == 0);
  76
  77                 /* Agent should not clear it, since it's still open. */
  78                 ok1(external_agent_operation(agent, OPEN_WITH_HOOK,
  79                                              "run-83-openhook.tdb") == SUCCESS);
  80                 ok1(external_agent_operation(agent, FETCH, "key") == SUCCESS);
  81                 ok1(external_agent_operation(agent, CLOSE, "") == SUCCESS);
  82
  83                 /* Still exists for us too. */
  84                 ok1(tdb_exists(tdb, key));
  85
  86                 /* Close it, now agent should clear it. */
  87                 tdb_close(tdb);
  88
  89                 ok1(external_agent_operation(agent, OPEN_WITH_HOOK,
  90                                              "run-83-openhook.tdb") == SUCCESS);
  91                 ok1(external_agent_operation(agent, FETCH, "key") == FAILED);
  92                 ok1(external_agent_operation(agent, CLOSE, "") == SUCCESS);
  93
  94                 ok1(tap_log_messages == 0);
  95         }
  96
  97         free_external_agent(agent);
  98         return exit_status();
  99 }