--- /dev/null
+#define _XOPEN_SOURCE 500
+#include <unistd.h>
+static ssize_t pwrite_check(int fd, const void *buf, size_t count, off_t offset);
+static ssize_t write_check(int fd, const void *buf, size_t count);
+static int fcntl_check(int fd, int cmd, ... /* arg */ );
+static int ftruncate_check(int fd, off_t length);
+
+#define pwrite pwrite_check
+#define write write_check
+#define fcntl fcntl_check
+#define ftruncate ftruncate_check
+
+#include <ccan/tdb/tdb.h>
+#include <ccan/tdb/io.c>
+#include <ccan/tdb/tdb.c>
+#include <ccan/tdb/lock.c>
+#include <ccan/tdb/freelist.c>
+#include <ccan/tdb/traverse.c>
+#include <ccan/tdb/transaction.c>
+#include <ccan/tdb/error.c>
+#include <ccan/tdb/open.c>
+#include <ccan/tap/tap.h>
+#include <stdlib.h>
+#include <stdbool.h>
+#include <stdarg.h>
+#include <err.h>
+#include "external-transaction.h"
+
+static struct agent *agent;
+static bool agent_pending;
+static bool in_transaction;
+static int errors = 0;
+static bool snapshot_uptodate;
+static char *snapshot;
+static off_t snapshot_len;
+static bool clear_if_first;
+#define TEST_DBNAME "/tmp/test7.tdb"
+
+#undef write
+#undef pwrite
+#undef fcntl
+#undef ftruncate
+
+static void save_file_contents(int fd)
+{
+ struct stat st;
+ int res;
+
+ /* Save copy of file. */
+ stat(TEST_DBNAME, &st);
+ if (snapshot_len != st.st_size) {
+ snapshot = realloc(snapshot, st.st_size * 2);
+ snapshot_len = st.st_size;
+ }
+ res = pread(fd, snapshot, snapshot_len, 0);
+ if (res != snapshot_len)
+ err(1, "Reading %zu bytes = %u", (size_t)snapshot_len, res);
+ snapshot_uptodate = true;
+}
+
+static void check_for_agent(int fd, bool block)
+{
+ struct stat st;
+ int res;
+
+ if (!external_agent_operation_check(agent, block, &res))
+ return;
+
+ if (res != 0)
+ err(1, "Agent failed open");
+ agent_pending = false;
+
+ if (!snapshot_uptodate)
+ return;
+
+ stat(TEST_DBNAME, &st);
+ if (st.st_size != snapshot_len) {
+ diag("Other open changed size from %zu -> %zu",
+ (size_t)snapshot_len, (size_t)st.st_size);
+ errors++;
+ return;
+ }
+
+ if (pread(fd, snapshot+snapshot_len, snapshot_len, 0) != snapshot_len)
+ err(1, "Reading %zu bytes", (size_t)snapshot_len);
+ if (memcmp(snapshot, snapshot+snapshot_len, snapshot_len) != 0) {
+ diag("File changed");
+ errors++;
+ return;
+ }
+}
+
+static void check_file_contents(int fd)
+{
+ if (agent_pending)
+ check_for_agent(fd, false);
+
+ if (!agent_pending) {
+ save_file_contents(fd);
+
+ /* Ask agent to open file. */
+ external_agent_operation_start(agent,
+ clear_if_first ?
+ OPEN_WITH_CLEAR_IF_FIRST :
+ OPEN,
+ TEST_DBNAME);
+ agent_pending = true;
+ /* Hack: give it a chance to run. */
+ sleep(0);
+ }
+
+ check_for_agent(fd, false);
+}
+
+static ssize_t pwrite_check(int fd,
+ const void *buf, size_t count, off_t offset)
+{
+ ssize_t ret;
+
+ if (in_transaction)
+ check_file_contents(fd);
+
+ snapshot_uptodate = false;
+ ret = pwrite(fd, buf, count, offset);
+ if (ret != count)
+ return ret;
+
+ if (in_transaction)
+ check_file_contents(fd);
+ return ret;
+}
+
+static ssize_t write_check(int fd, const void *buf, size_t count)
+{
+ ssize_t ret;
+
+ if (in_transaction)
+ check_file_contents(fd);
+
+ snapshot_uptodate = false;
+
+ ret = write(fd, buf, count);
+ if (ret != count)
+ return ret;
+
+ if (in_transaction)
+ check_file_contents(fd);
+ return ret;
+}
+
+/* This seems to be a macro for glibc... */
+extern int fcntl(int fd, int cmd, ... /* arg */ );
+
+static int fcntl_check(int fd, int cmd, ... /* arg */ )
+{
+ va_list ap;
+ int ret, arg3;
+ struct flock *fl;
+
+ if (cmd != F_SETLK && cmd != F_SETLKW) {
+ /* This may be totally bogus, but we don't know in general. */
+ va_start(ap, cmd);
+ arg3 = va_arg(ap, int);
+ va_end(ap);
+
+ return fcntl(fd, cmd, arg3);
+ }
+
+ va_start(ap, cmd);
+ fl = va_arg(ap, struct flock *);
+ va_end(ap);
+
+ ret = fcntl(fd, cmd, fl);
+
+ if (in_transaction && fl->l_type == F_UNLCK)
+ check_file_contents(fd);
+ return ret;
+}
+
+static int ftruncate_check(int fd, off_t length)
+{
+ int ret;
+
+ if (in_transaction)
+ check_file_contents(fd);
+
+ snapshot_uptodate = false;
+
+ ret = ftruncate(fd, length);
+
+ if (in_transaction)
+ check_file_contents(fd);
+ return ret;
+}
+
+int main(int argc, char *argv[])
+{
+ const int flags[] = { TDB_DEFAULT,
+ TDB_CLEAR_IF_FIRST,
+ TDB_NOMMAP,
+ TDB_CLEAR_IF_FIRST | TDB_NOMMAP };
+ int i;
+ struct tdb_context *tdb;
+ TDB_DATA key, data;
+
+ plan_tests(20);
+ agent = prepare_external_agent();
+ if (!agent)
+ err(1, "preparing agent");
+
+ /* Nice ourselves down: we can't tell the difference between agent
+ * blocking on lock, and agent not scheduled. */
+ nice(15);
+
+ for (i = 0; i < sizeof(flags)/sizeof(flags[0]); i++) {
+ unlink(TEST_DBNAME);
+ tdb = tdb_open(TEST_DBNAME, 1024, flags[i],
+ O_CREAT|O_TRUNC|O_RDWR, 0600);
+ ok1(tdb);
+ clear_if_first = (flags[i] & TDB_CLEAR_IF_FIRST);
+
+ ok1(tdb_transaction_start(tdb) == 0);
+ in_transaction = true;
+ key.dsize = strlen("hi");
+ key.dptr = (void *)"hi";
+ data.dptr = (void *)"world";
+ data.dsize = strlen("world");
+
+ ok1(tdb_store(tdb, key, data, TDB_INSERT) == 0);
+ ok1(tdb_transaction_commit(tdb) == 0);
+ if (agent_pending)
+ check_for_agent(tdb->fd, true);
+ ok(errors == 0, "We had %u errors", errors);
+
+ tdb_close(tdb);
+ }
+
+ return exit_status();
+}
projects / ccan / blobdiff