bool is_addr_in_use(apr_status_t status)
{
#if LL_WINDOWS
return (WSAEADDRINUSE == APR_TO_OS_ERROR(status));
#else
return (EADDRINUSE == APR_TO_OS_ERROR(status));
#endif
}
/* Return the transaction name of the activity stored in file
PATHNAME, or NULL if PATHNAME cannot be read for any reason. */
static const char *
read_txn(const char *pathname, apr_pool_t *pool)
{
apr_file_t *activity_file;
apr_pool_t *iterpool = svn_pool_create(pool);
apr_size_t len;
svn_error_t *err = SVN_NO_ERROR;
char *txn_name = apr_palloc(pool, SVN_FS__TXN_MAX_LEN+1);
int i;
/* Try up to 10 times to read the txn name, retrying on ESTALE
(stale NFS file handle because of dav_svn__store_activity
renaming the activity file into place).
*/
for (i = 0; i < 10; i++)
{
svn_error_clear(err);
svn_pool_clear(iterpool);
err = svn_io_file_open(&activity_file, pathname,
APR_READ | APR_BUFFERED,
APR_OS_DEFAULT, iterpool);
if (err)
{
#ifdef ESTALE
if (APR_TO_OS_ERROR(err->apr_err) == ESTALE)
/* Retry on ESTALE... */
continue;
#endif
/* ...else bail. */
break;
}
len = SVN_FS__TXN_MAX_LEN;
err = svn_io_read_length_line(activity_file, txn_name, &len, iterpool);
if (err)
{
#ifdef ESTALE
if (APR_TO_OS_ERROR(err->apr_err) == ESTALE)
continue;
#endif
break;
}
err = svn_io_file_close(activity_file, iterpool);
#ifdef ESTALE
if (err)
{
if (APR_TO_OS_ERROR(err->apr_err) == ESTALE)
{
/* No retry, just completely ignore this ESTALE. */
svn_error_clear(err);
err = SVN_NO_ERROR;
}
}
#endif
/* We have a txn_name or had a non-ESTALE close failure; either
way, we're finished. */
break;
}
svn_pool_destroy(iterpool);
/* ### let's just assume that any error means the
### activity/transaction doesn't exist */
if (err)
{
svn_error_clear(err);
return NULL;
}
return txn_name;
}