/**
* Synchronize a file's state with the state on disk.
*
* @param[in] portLibrary The port library
* @param[in] fd The file descriptor.
*
* @return 0 on success, -1 on failure.
* @internal @todo return negative portable return code on failure.
*/
int32_t
omrfile_sync(struct OMRPortLibrary *portLibrary, intptr_t inFD)
{
int fd = (int)inFD;
int32_t result = 0;
Trc_PRT_file_sync_Entry(inFD);
#ifdef J9ZOS390
if (fd == OMRPORT_TTY_OUT) {
result = fflush(stdout);
Trc_PRT_file_sync_Exit(result);
return result;
} else if (fd == OMRPORT_TTY_ERR) {
result = fflush(stderr);
Trc_PRT_file_sync_Exit(result);
return result;
} else if (fd < FD_BIAS) {
Trc_PRT_file_sync_Exit(-1);
/* Cannot fsync STDIN, and no other FD's should exist <FD_BIAS */
return -1;
}
#elif (FD_BIAS != 0)
#error FD_BIAS must be 0
#endif
result = fsync(fd - FD_BIAS);
Trc_PRT_file_sync_Exit(result);
return result;
}
int32_t
omrfile_sync(struct OMRPortLibrary *portLibrary, intptr_t fd)
{
HANDLE handle = toHandle(portLibrary, fd);
Trc_PRT_file_sync_Entry(fd);
/*
* According to MSDN:
* 1) If hFile is a handle to the server end of a named pipe, the function does not return until the client has read all buffered data from the pipe.
* 2) The function fails if hFile is a handle to the console output. That is because the console output is not buffered. The function returns FALSE, and GetLastError returns ERROR_INVALID_HANDLE.
*
* This behaviour caused JAZZ 44899 defect: Test_SimpleTenantLimitXmt would freeze while waiting for process to terminate while child
* was waiting for parent to read from STDIN and STDOUT streams of a child.
*
* Manual testing showed that even if we called System.out.print('X') and System.err.print('Y') a parent process would still get receive 'X' and 'Y'
* (with and without flushing) after child process in terminated.
*
* This check does not modify original behaviour of the port library because we never actually flushed STDIN and STDOUT handles but
* some arbitrary handles 1 & 2.
*/
if (((HANDLE)OMRPORT_TTY_OUT == (HANDLE)fd) || ((HANDLE)OMRPORT_TTY_ERR == (HANDLE)fd)) {
Trc_PRT_file_sync_Exit(0);
return 0;
}
if (FlushFileBuffers(handle)) {
Trc_PRT_file_sync_Exit(0);
return 0;
} else {
int32_t error = GetLastError();
error = portLibrary->error_set_last_error(portLibrary, error, findError(error));
Trc_PRT_file_sync_Exit(error);
return -1;
}
}
