isOpen

open an ISAM file

SYNOPSIS

IsFile *isOpen( char * name, int mode );

name path/name of an existing isam file
mode see open modes

RETURN

allocated file descriptor, or NULL on failure, in which case the error code will be found in the errno global.

NOTES

the file name must be specified without the .dat or .idx extension, and must be less than 251 bytes in length.

the current index will be set to the primary.