= Back-end utility functions =

      The following functions can be used in your validator and assimilator code:
{{{
int try_fopen(char* path, FILE*& f, char* mode);
}}}
      Open a file, distinguishing between recoverable and nonrecoverable errors. Returns zero on success. Returns ERR_FOPEN if the directory is present but not the file (this is considered a nonrecoverable error). Returns ERR_OPENDIR if the directory is not there (this is generally a recoverable error, like NFS mount failure).              [http://boinc.berkeley.edu// Return to BOINC main page]             Last modified 10:06 PM UTC, April 16 2007.              Copyright © 2007  University of California.         Permission is granted to copy, distribute and/or modify this document         under the terms of the GNU Free Documentation License,         Version 1.2 or any later version published by the Free Software Foundation.