Gdbm files

Returns the status of the automatic synchronization mode. When synchronization mode is on true , any changes to the database are immediately written to the disk. This ensures database consistency in case of any unforeseen errors e. This method will croak if the libgdbm library is complied without memory mapping support. If memory mapping is enabled, returns the size of memory mapping. Reference to code for detailed error reporting. Upon encountering an error, recover will call this sub with a single argument - a description of the error.

Maximum allowed number of failed keys. Maximum allowed number of failed buckets. The master site is ftp. The GDBM documentation doesn't imply that files from untrusted sources can be safely used with libgdbm.

Please contact him via the GitHub issue tracker or email regarding any issues with the site itself, search, or rendering of documentation. The Perl documentation is maintained by the Perl 5 Porters in the development of Perl. Please contact them via the Perl issue tracker , the mailing list , or IRC to report any issues with the contents or format of the documentation. The latter case makes more sense than you might think why wouldn't you just use a hash table?

Multiple standards. Well, kind of. The problem is, in the dbm world, there is original dbm, "new" ndbm, and GNU gdbm. They all use different file formats, so to use an original dbm file with gdbm you have to convert it there is a utility to do so. Is data null-terminated or not? Since "key" may be different from "key0", if you're working with a dbm file used by a different program, you need to be aware of the convention used by that program.

After reading the man pages for gdbm, you may be wondering how the heck the data is used, since it's not really documented. There's a little more detail on my gdbm example code page. Memory management When gdbm fetches a datum from a file, it malloc s the buffer for you and returns the datum -- but that means, of course, that you have to free the buffer yourself! Failure to do so, as always, will work fine until you go into production and everybody's watching, at which point your process will crash and burn from the memory leaks.

GNU source directory Go get your own copy! Current version as of this writing is gdbm