Open System Services Porting Guide (G06.24+, H06.03+)
Table Of Contents
- What’s New in This Manual
- About This Manual
- 1 Introduction to Porting
- 2 The Development Environment
- 3 Useful Porting Tools
- 4 Interoperating Between User Environments
- Purpose of Interoperability
- The OSS User Environment
- OSS Commands for the Guardian User
- Guardian Commands for the UNIX User
- OSS Pathname and Guardian Filename Conversions
- Running the OSS Shell and Commands From TACL
- Running Guardian Commands From the OSS Shell
- Running OSS Processes With Guardian Attributes
- Using OSS Commands to Manage Guardian Objects
- 5 Interoperating Between Programming Environments
- 6 OSS Porting Considerations
- 7 Porting UNIX Applications to the OSS Environment
- 8 Migrating Guardian Applications to the OSS Environment
- General Migration Guidelines
- C Compiler Issues for Guardian Programs
- Using New and Extended Guardian Procedures
- Using OSS Functions in a Guardian Program
- Interoperating With OSS Programs
- Starting an OSS Program From the Guardian Environment
- C Compiler Considerations for OSS Programs
- Porting a Guardian Program to the OSS Environment
- How Arguments Are Passed to the C or C++ Program
- Differences in the Two Run-Time Environments
- Which Run-Time Routines Are Available
- Use of Common Run-Time Environment (CRE) Functions
- Replacing Guardian Procedure Calls With Equivalent OSS Functions
- Which IPC Mechanisms Can Be Used
- Interactions Between Guardian and OSS Functions
- 9 Porting From Specific UNIX Systems
- 10 Native Migration Overview
- 11 Porting or Migrating Sockets Applications
- 12 Porting Threaded Applications
- A Equivalent OSS and UNIX Commands for Guardian Users
- B Equivalent Guardian Commands for OSS and UNIX Users
- C Equivalent Inspect Debugging Commands for dbx Commands
- D Equivalent Native Inspect Debugging Commands for dbx Commands
- E Standard POSIX Threads Functions: Differences Between the Previous and Current Standards
- Glossary
- Index
Porting UNIX Applications to the OSS Environment
Open System Services Porting Guide—520573-006
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Guardian Procedure Calls for Interoperability
HP extension functions give application programs access to a richer set of features
than those available through the standard open functions. These features include
Guardian procedure calls, interoperable I/O routines, and process-control functions.
Guardian Procedure Calls for Interoperability
The Guardian process control, filename mapping, and user information procedure calls
that support interoperability between OSS and Guardian file systems are:
The PROCESS_SPAWN_ procedure allows the creation of OSS processes from the
Guardian environment, but it can also be used from the OSS environment.
The FILENAME_TO_PATHNAME_ and PATHNAME_TO_FILENAME_ mapping
procedures facilitate interoperability between OSS and Guardian file systems by
providing the link between OSS pathnames and Guardian filenames.
The other Guardian procedures return user and group information to the application.
More information on using these extended Guardian procedure calls is provided in
Using New and Extended Guardian Procedures on page 8-10.
Environment-Specific I/O Routines
Environment-specific I/O routines are used to provide interoperability between OSS
files and Guardian files. Both the OSS and the Guardian variants of these functions are
available: for example, rename_oss() and rename_guardian(). These routines
are discussed in Environment-Specific Functions
on page 5-5:
Process-Creation Functions Specific to HP
A set of process-creation functions are provided to give the OSS programmer more
control over which attributes are given to a new process. The Using Process-Creation
PROCESS_SPAWN_ Runs an OSS process
FILENAME_TO_PATHNAME_ Maps Guardian filename to OSS pathname
PATHNAME_TO_FILENAME_ Maps OSS pathname to Guardian filename
GROUP_GETINFO_ Provides group information
USER_GETINFO_ Provides user information
USER_GETNEXT_ Provides user information for next user
fopen() Opens a stream.
freopen() Opens a stream.
remove() Removes a file.
rename() Renames a file or directory.
tmpfile() Creates a temporary file.
tmpnam() Creates a name for a temporary file.