Accessing Files Programmer's Guide (32650-90885)

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14 Getting File Information
MPE/iX provides a number of commands and intrinsics that enable you to obtain
information about your files. You can use the commands and intrinsics described in this
chapter to obtain file information for a variety of purposes.
This chapter is divided into two main sections:
• General File Information covers the commands and intrinsics that you use to obtain
information concerning the physical and operational characteristics of your file (defined
by device dependencies, a disk file's label, FILE commands, HPFOPEN/FOPEN intrinsic
parameters, and file system defaults), as well as access-dependent details about a
currently opened file (including EOF and logical record marker locations). Commands
and intrinsics described in this section are:
LISTFILE command
LISTEQ command
[CMD] INFO command
FFILEINFO intrinsic
FGETINFO intrinsic
FLABELINFO intrinsic
FRELATE intrinsic
• Error information covers the intrinsics that you use specifically to handle file system
errors–to identify an error and to display error information at the terminal. This can
include a description of the error condition returned by the last file access intrinsic call.
Intrinsics described in this section are:
FCHECK intrinsic
FERRMSG intrinsic
PRINTFILEINFO intrinsic
A number of commands and intrinsics return the same information. Which one you use in
a certain situation is by the context and by the purpose for which you wish to use the
information.