Haiku is missing quite a bit of POSIX functionality (mandatory and optional), some is not implemented correctly, others are exposed in the wrong header. This is a research to identify those issues:

• Make a complete POSIX header list of headers/posix/sys/
• Iterate through the sys/ headers ( http://dev.haiku-os.org/browser/haiku/trunk/headers/posix/sys ) an compare them with the specification ( http://www.opengroup.org/onlinepubs/9699919799/).

• sys/ipc.h - XSI interprocess communication access structure
• sys/mman.h - memory management declarations
• sys/msg.h - XSI message queue structures
• sys/resource.h - definitions for XSI resource operations
• sys/select.h - select types
• sys/sem.h - XSI semaphore facility
• sys/shm.h - XSI shared memory facility
• sys/socket.h - main sockets header
• sys/stat.h - data returned by the stat() function
• sys/statvfs.h - VFS File System information structure
• sys/time.h - time types
• sys/times.h - file access and modification times structure
• sys/types.h - data types
• sys/uio.h - definitions for vector I/O operations
• sys/un.h - definitions for UNIX domain sockets
• sys/utsname.h - system name structure
• sys/wait.h - declarations for waiting