/**************************************************************************/ /* */ /* Copyright (c) 2001, 2010 NoMachine, http://www.nomachine.com/. */ /* */ /* NXCOMP, NX protocol compression and NX extensions to this software */ /* are copyright of NoMachine. Redistribution and use of the present */ /* software is allowed according to terms specified in the file LICENSE */ /* which comes in the source distribution. */ /* */ /* Check http://www.nomachine.com/licensing.html for applicability. */ /* */ /* NX and NoMachine are trademarks of Medialogic S.p.A. */ /* */ /* All rights reserved. */ /* */ /**************************************************************************/ #include #include "Fork.h" #include "Misc.h" #include "Timestamp.h" // // Set the verbosity level. // #define PANIC #define WARNING #undef TEST #undef DEBUG // // Only on Cygwin, retry n times waiting a // given amount of milliseconds after each // attempt. // #define RETRY_LIMIT 30 #define RETRY_TIMEOUT 1000 int Fork() { #ifdef __CYGWIN32__ int limit = RETRY_LIMIT; int timeout = RETRY_TIMEOUT; #else int limit = 1; int timeout = 0; #endif int pid = 0; for (int i = 0; i < limit; i++) { #ifdef TEST *logofs << "Fork: Trying at " << strMsTimestamp() << ".\n" << logofs_flush; #endif // // It could optionally try again only if the // error code is 11, 'Resource temporarily // unavailable'. // if ((pid = fork()) >= 0) { break; } else if (i < limit - 1) { #ifdef WARNING *logofs << "Fork: WARNING! Function fork failed. " << "Error is " << EGET() << " '" << ESTR() << "'. Retrying...\n" << logofs_flush; #endif usleep(timeout * 1000); } } #ifdef TEST if (pid <= 0) { *logofs << "Fork: Returning at " << strMsTimestamp() << ".\n" << logofs_flush; } #endif return pid; }