NAME

ada.protect − protect (unprotect) an Ada library

SYNOPSIS

ada.protect [ -r | -u ] libraryname

Remarks:

This command requires installation of optional Ada software (not included with the standard HP-UX operating system) before it can be used. 

DESCRIPTION

Ada.protect marks an Ada library as read-only or as able to be updated. 

The following options are recognized:

−r Mark the Ada library read-only.  This is also the default action if no option is specified. 

−u Mark the Ada library as able to be updated. 

Environment Variables

The environment variable ADA_PATH is associated with all components of the Ada compilation system.  It must be set properly and exported before any component of the Ada compilation system (including ada.protect) can be used (see ada(1), Environment Variables). 

Locks

To ensure the integrity of their internal data structures, Ada libraries and families are locked for the duration of operations that are performed on them.  Normally Ada families are locked only briefly when a library is added, removed, or renamed; however, sometimes multiple Ada libraries must be locked for longer periods during a single operation.  If more than one library must be locked for a single operation, at most one library is locked for updating and all other locked libraries are locked for read-only. 

An Ada family or library locked for updating cannot be accessed in any way by any part of the Ada compilation system except by the part which holds the lock.  An Ada family or library locked for reading can be accessed by any part of the Ada compilation system for read-only purposes. 

If ada.protect cannot obtain a lock after a suitable number of retries, it displays an informational message and terminates. 

Under some circumstances, an Ada family or Ada library might be locked, but the locking program(s) might have terminated (for example, due to system crash or network failure).  If you determine that the Ada family or Ada library is locked but should not be locked, you can remove the lock. 

Use ada.unlock(1) to unlock an Ada library and ada.funlock(1) to unlock an Ada family.  However, unlocking should be done with care.  If an Ada family or Ada library is actually locked by a tool, unlocking it permits access by other tools that might find the contents invalid or might damage the Ada family or Ada library. 

DIAGNOSTICS

Ada.protect returns exit status 0 if the Ada library was successfully protected (unprotected); otherwise a diagnostic is issued and a non-zero exit status is returned. 

AUTHOR

Ada.protect was developed by HP and Alsys. 

FILES

$ADA_PATH/ada.protect Ada protect library command. 

$ADA_PATH/adacli Ada command language interpreter. 

$ADA_PATH/ada.mngrs.bin Ada components manager subprocess. 

$ADA_PATH/ada.lmgr.hlp Ada library manager help command data. 

$ADA_PATH/ada.lmgr.btl Ada library manager command tables. 

SEE ALSO

ada(1), ada.fmgr(1), ada.format(1), ada.funlock(1), ada.lmgr(1), ada.lsfam(1), ada.lslib(1), ada.make(1), ada.mkfam(1), ada.mklib(1), ada.mvfam(1), ada.mvlib(1), ada.probe(1), ada.rmfam(1), ada.rmlib(1), ada.umgr(1), ada.unlock(1), ada.xref(1),

Ada User’s Guide (Series 300).

EXTERNAL INFLUENCES

International Code Set Support

Single-byte character code sets are supported within file names. 

Hewlett-Packard Company  —  HP-UX Release 7.0: Sept 1989