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 #include "helpapi-external-agent.h"
   8
   9 #define KEY_STR "key"
  10
  11 static enum NTDB_ERROR clear_if_first(int fd, void *arg)
  12 {
  13 /* We hold a lock offset 4 always, so we can tell if anyone is holding it.
  14  * (This is compatible with tdb's TDB_CLEAR_IF_FIRST flag).  */
  15         struct flock fl;
  16
  17         if (arg != clear_if_first)
  18                 return NTDB_ERR_CORRUPT;
  19
  20         fl.l_type = F_WRLCK;
  21         fl.l_whence = SEEK_SET;
  22         fl.l_start = 4;
  23         fl.l_len = 1;
  24
  25         if (fcntl(fd, F_SETLK, &fl) == 0) {
  26                 /* We must be first ones to open it! */
  27                 diag("truncating file!");
  28                 if (ftruncate(fd, 0) != 0) {
  29                         return NTDB_ERR_IO;
  30                 }
  31         }
  32         fl.l_type = F_RDLCK;
  33         if (fcntl(fd, F_SETLKW, &fl) != 0) {
  34                 return NTDB_ERR_IO;
  35         }
  36         return NTDB_SUCCESS;
  37 }
  38
  39 int main(int argc, char *argv[])
  40 {
  41         unsigned int i;
  42         struct ntdb_context *ntdb, *ntdb2;
  43         struct agent *agent;
  44         union ntdb_attribute cif;
  45         NTDB_DATA key = ntdb_mkdata(KEY_STR, strlen(KEY_STR));
  46         int flags[] = { NTDB_DEFAULT, NTDB_NOMMAP,
  47                         NTDB_CONVERT, NTDB_NOMMAP|NTDB_CONVERT };
  48
  49         cif.openhook.base.attr = NTDB_ATTRIBUTE_OPENHOOK;
  50         cif.openhook.base.next = &tap_log_attr;
  51         cif.openhook.fn = clear_if_first;
  52         cif.openhook.data = clear_if_first;
  53
  54         agent = prepare_external_agent();
  55         plan_tests(sizeof(flags) / sizeof(flags[0]) * 16);
  56         for (i = 0; i < sizeof(flags) / sizeof(flags[0]); i++) {
  57                 /* Create it */
  58                 ntdb = ntdb_open("run-83-openhook.ntdb", flags[i]|MAYBE_NOSYNC,
  59                                  O_RDWR|O_CREAT|O_TRUNC, 0600, NULL);
  60                 ok1(ntdb);
  61                 ok1(ntdb_store(ntdb, key, key, NTDB_REPLACE) == 0);
  62                 ntdb_close(ntdb);
  63
  64                 /* Now, open with CIF, should clear it. */
  65                 ntdb = ntdb_open("run-83-openhook.ntdb", flags[i]|MAYBE_NOSYNC,
  66                                  O_RDWR, 0, &cif);
  67                 ok1(ntdb);
  68                 ok1(!ntdb_exists(ntdb, key));
  69                 ok1(ntdb_store(ntdb, key, key, NTDB_REPLACE) == 0);
  70
  71                 /* Agent should not clear it, since it's still open. */
  72                 ok1(external_agent_operation(agent, OPEN_WITH_HOOK,
  73                                              "run-83-openhook.ntdb") == SUCCESS);
  74                 ok1(external_agent_operation(agent, FETCH, KEY_STR "=" KEY_STR)
  75                     == SUCCESS);
  76                 ok1(external_agent_operation(agent, CLOSE, "") == SUCCESS);
  77
  78                 /* Still exists for us too. */
  79                 ok1(ntdb_exists(ntdb, key));
  80
  81                 /* Nested open should not erase db. */
  82                 ntdb2 = ntdb_open("run-83-openhook.ntdb", flags[i]|MAYBE_NOSYNC,
  83                                   O_RDWR, 0, &cif);
  84                 ok1(ntdb_exists(ntdb2, key));
  85                 ok1(ntdb_exists(ntdb, key));
  86                 ntdb_close(ntdb2);
  87
  88                 ok1(ntdb_exists(ntdb, key));
  89
  90                 /* Close it, now agent should clear it. */
  91                 ntdb_close(ntdb);
  92
  93                 ok1(external_agent_operation(agent, OPEN_WITH_HOOK,
  94                                              "run-83-openhook.ntdb") == SUCCESS);
  95                 ok1(external_agent_operation(agent, FETCH, KEY_STR "=" KEY_STR)
  96                     == FAILED);
  97                 ok1(external_agent_operation(agent, CLOSE, "") == SUCCESS);
  98
  99                 ok1(tap_log_messages == 0);
 100         }
 101
 102         free_external_agent(agent);
 103         return exit_status();
 104 }