int util_create_lock_file(const char *lockFileName, bool abortDuplicates) {
int result = 0;
FILE *fp = safe_fopen_wrapper_follow( lockFileName, "w" );
if ( fp == NULL ) {
debug_printf( DEBUG_QUIET,
"ERROR: could not open lock file %s for writing.\n",
lockFileName);
result = -1;
}
//
// Create the ProcessId object.
//
ProcessId *procId = NULL;
if ( result == 0 && abortDuplicates ) {
int status;
int precision_range = 1;
if ( ProcAPI::createProcessId( daemonCore->getpid(), procId,
status, &precision_range ) != PROCAPI_SUCCESS ) {
debug_printf( DEBUG_QUIET, "ERROR: ProcAPI::createProcessId() "
"failed; %d\n", status );
result = -1;
}
}
//
// Write out the ProcessId object.
//
if ( result == 0 && abortDuplicates ) {
if ( procId->write( fp ) != ProcessId::SUCCESS ) {
debug_printf( DEBUG_QUIET, "ERROR: ProcessId::write() failed\n");
result = -1;
}
}
//
// Sleep to ensure uniqueness of the ProcessId object.
//
if ( result == 0 && abortDuplicates ) {
const int maxSleepTime = 60; // seconds; arbitrarily chosen
int sleepTime = procId->computeWaitTime();
if ( sleepTime > maxSleepTime ) {
debug_printf( DEBUG_QUIET, "Warning: ProcessId computed sleep "
"time (%d) exceeds maximum (%d); skipping sleep/"
"confirm step\n", sleepTime, maxSleepTime );
check_warning_strictness( DAG_STRICT_3 );
} else {
debug_printf( DEBUG_NORMAL, "Sleeping for %d seconds to "
"ensure ProcessId uniqueness\n", sleepTime );
#if defined(WIN32)
sleep( sleepTime );
#else
while( (sleepTime = sleep( sleepTime ) ) != 0 ) { }
#endif
//
// Confirm the ProcessId object's uniqueness.
//
int status;
if ( ProcAPI::confirmProcessId( *procId, status ) !=
PROCAPI_SUCCESS ) {
debug_printf( DEBUG_QUIET, "Warning: ProcAPI::"
"confirmProcessId() failed; %d\n", status );
check_warning_strictness( DAG_STRICT_3 );
} else {
if ( !procId->isConfirmed() ) {
debug_printf( DEBUG_QUIET, "Warning: ProcessId not "
"confirmed unique\n" );
check_warning_strictness( DAG_STRICT_3 );
} else {
//
// Write out the confirmation.
//
if ( procId->writeConfirmationOnly( fp ) !=
ProcessId::SUCCESS ) {
debug_printf( DEBUG_QUIET, "ERROR: ProcessId::"
"writeConfirmationOnly() failed\n");
result = -1;
}
}
}
}
}
delete procId;
if ( fp != NULL ) {
if ( fclose( fp ) != 0 ) {
debug_printf( DEBUG_QUIET, "ERROR: closing lock "
"file failed with errno %d (%s)\n", errno,
strerror( errno ) );
}
}
return result;
}
