Programmer's Guide
Tru64 UNIX, Version 4.0F, April 1999

© Digital Equipment Corporation 1998, 1999. All rights reserved.


This manual describes the program development environment of the Compaq Tru64 UNIX (formerly DIGITAL UNIX) operating system, emphasizing the C programming language.


COMPAQ, the Compaq logo, and the Digital logo are registered in the U.S. Patent and Trademark Office. The following are trademarks of Digital Equipment Corporation: ALL-IN-1, Alpha AXP, AlphaGeneration, AlphaServer, AltaVista, ATMworks, AXP, Bookreader, CDA, DDIS, DEC, DEC Ada, DECevent, DEC Fortran, DEC FUSE, DECnet, DECstation, DECsystem, DECterm, DECUS, DECwindows, DTIF, Massbus, MicroVAX, OpenVMS, POLYCENTER, PrintServer, Q-bus, StorageWorks, Tru64, TruCluster, TURBOchannel, ULTRIX, ULTRIX Mail Connection, ULTRIX Worksystem Software, UNIBUS, VAX, VAXstation, VMS, and XUI. Other product names mentioned herein may be the trademarks of their respective companies.

Open Software Foundation, OSF, OSF/1, OSF/Motif, and Motif are trademarks of the Open Software Foundation, Inc. UNIX is a registered trademark and The Open Group is a trademark of The Open Group in the US and other countries.