Unistd.h Constans for Options

The following symbolic constants, if defined in , shall have a value of -1, 0, or greater, unless otherwise specified below. For profile implementations that define _POSIX_SUBPROFILE (see Subprofiling Considerations) in , constants described below as always having a value greater than zero need not be defined and, if defined, may have a value of -1, 0, or greater. The values shall be suitable for use in #if preprocessing directives.

If a symbolic constant is not defined or is defined with the value -1, the option is not supported for compilation. If it is defined with a value greater than zero, the option shall always be supported when the application is executed. If it is defined with the value zero, the option shall be supported for compilation and might or might not be supported at runtime. See Options for further information about the conformance requirements of these three categories of support.

_POSIX_ADVISORY_INFO The implementation supports the Advisory Information option. If this symbol is defined in , it shall be defined to be -1, 0, or 200809L. The value of this symbol reported by sysconf() shall either be -1 or 200809L. _POSIX_ASYNCHRONOUS_IO The implementation supports asynchronous input and output. This symbol shall always be set to the value 200809L. _POSIX_BARRIERS The implementation supports barriers. This symbol shall always be set to the value 200809L. _POSIX_CHOWN_RESTRICTED The use of chown() and fchown() is restricted to a process with appropriate privileges, and to changing the group ID of a file only to the effective group ID of the process or to one of its supplementary group IDs. This symbol shall be defined with a value other than -1. _POSIX_CLOCK_SELECTION The implementation supports clock selection. This symbol shall always be set to the value 200809L. _POSIX_CPUTIME The implementation supports the Process CPU-Time Clocks option. If this symbol is defined in , it shall be defined to be -1, 0, or 200809L. The value of this symbol reported by sysconf() shall either be -1 or 200809L. _POSIX_FSYNC The implementation supports the File Synchronization option. If this symbol is defined in , it shall be defined to be -1, 0, or 200809L. The value of this symbol reported by sysconf() shall either be -1 or 200809L. _POSIX_IPV6 The implementation supports the IPv6 option. If this symbol is defined in , it shall be defined to be -1, 0, or 200809L. The value of this symbol reported by sysconf() shall either be -1 or 200809L. _POSIX_JOB_CONTROL The implementation supports job control. This symbol shall always be set to a value greater than zero. _POSIX_MAPPED_FILES The implementation supports memory mapped Files. This symbol shall always be set to the value 200809L. _POSIX_MEMLOCK The implementation supports the Process Memory Locking option. If this symbol is defined in , it shall be defined to be -1, 0, or 200809L. The value of this symbol reported by sysconf() shall either be -1 or 200809L. _POSIX_MEMLOCK_RANGE The implementation supports the Range Memory Locking option. If this symbol is defined in , it shall be defined to be -1, 0, or 200809L. The value of this symbol reported by sysconf() shall either be -1 or 200809L. _POSIX_MEMORY_PROTECTION The implementation supports memory protection. This symbol shall always be set to the value 200809L. _POSIX_MESSAGE_PASSING The implementation supports the Message Passing option. If this symbol is defined in , it shall be defined to be -1, 0, or 200809L. The value of this symbol reported by sysconf() shall either be -1 or 200809L. _POSIX_MONOTONIC_CLOCK The implementation supports the Monotonic Clock option. If this symbol is defined in , it shall be defined to be -1, 0, or 200809L. The value of this symbol reported by sysconf() shall either be -1 or 200809L. _POSIX_NO_TRUNC Pathname components longer than {NAME_MAX} generate an error. This symbol shall be defined with a value other than -1. _POSIX_PRIORITIZED_IO The implementation supports the Prioritized Input and Output option. If this symbol is defined in , it shall be defined to be -1, 0, or 200809L. The value of this symbol reported by sysconf() shall either be -1 or 200809L. _POSIX_PRIORITY_SCHEDULING The implementation supports the Process Scheduling option. If this symbol is defined in , it shall be defined to be -1, 0, or 200809L. The value of this symbol reported by sysconf() shall either be -1 or 200809L. _POSIX_RAW_SOCKETS The implementation supports the Raw Sockets option. If this symbol is defined in , it shall be defined to be -1, 0, or 200809L. The value of this symbol reported by sysconf() shall either be -1 or 200809L. _POSIX_READER_WRITER_LOCKS The implementation supports read-write locks. This symbol shall always be set to the value 200809L. _POSIX_REALTIME_SIGNALS The implementation supports realtime signals. This symbol shall always be set to the value 200809L. _POSIX_REGEXP The implementation supports the Regular Expression Handling option. This symbol shall always be set to a value greater than zero. _POSIX_SAVED_IDS Each process has a saved set-user-ID and a saved set-group-ID. This symbol shall always be set to a value greater than zero. _POSIX_SEMAPHORES The implementation supports semaphores. This symbol shall always be set to the value 200809L. _POSIX_SHARED_MEMORY_OBJECTS The implementation supports the Shared Memory Objects option. If this symbol is defined in , it shall be defined to be -1, 0, or 200809L. The value of this symbol reported by sysconf() shall either be -1 or 200809L. _POSIX_SHELL The implementation supports the POSIX shell. This symbol shall always be set to a value greater than zero. _POSIX_SPAWN The implementation supports the Spawn option. If this symbol is defined in , it shall be defined to be -1, 0, or 200809L. The value of this symbol reported by sysconf() shall either be -1 or 200809L. _POSIX_SPIN_LOCKS The implementation supports spin locks. This symbol shall always be set to the value 200809L. _POSIX_SPORADIC_SERVER The implementation supports the Process Sporadic Server option. If this symbol is defined in , it shall be defined to be -1, 0, or 200809L. The value of this symbol reported by sysconf() shall either be -1 or 200809L. _POSIX_SYNCHRONIZED_IO The implementation supports the Synchronized Input and Output option. If this symbol is defined in , it shall be defined to be -1, 0, or 200809L. The value of this symbol reported by sysconf() shall either be -1 or 200809L. _POSIX_THREAD_ATTR_STACKADDR The implementation supports the Thread Stack Address Attribute option. If this symbol is defined in , it shall be defined to be -1, 0, or 200809L. The value of this symbol reported by sysconf() shall either be -1 or 200809L. _POSIX_THREAD_ATTR_STACKSIZE The implementation supports the Thread Stack Size Attribute option. If this symbol is defined in , it shall be defined to be -1, 0, or 200809L. The value of this symbol reported by sysconf() shall either be -1 or 200809L. _POSIX_THREAD_CPUTIME The implementation supports the Thread CPU-Time Clocks option. If this symbol is defined in , it shall be defined to be -1, 0, or 200809L. The value of this symbol reported by sysconf() shall either be -1 or 200809L. _POSIX_THREAD_PRIO_INHERIT The implementation supports the Non-Robust Mutex Priority Inheritance option. If this symbol is defined in , it shall be defined to be -1, 0, or 200809L. The value of this symbol reported by sysconf() shall either be -1 or 200809L. _POSIX_THREAD_PRIO_PROTECT The implementation supports the Non-Robust Mutex Priority Protection option. If this symbol is defined in , it shall be defined to be -1, 0, or 200809L. The value of this symbol reported by sysconf() shall either be -1 or 200809L. _POSIX_THREAD_PRIORITY_SCHEDULING The implementation supports the Thread Execution Scheduling option. If this symbol is defined in , it shall be defined to be -1, 0, or 200809L. The value of this symbol reported by sysconf() shall either be -1 or 200809L. _POSIX_THREAD_PROCESS_SHARED The implementation supports the Thread Process-Shared Synchronization option. If this symbol is defined in , it shall be defined to be -1, 0, or 200809L. The value of this symbol reported by sysconf() shall either be -1 or 200809L. _POSIX_THREAD_ROBUST_PRIO_INHERIT The implementation supports the Robust Mutex Priority Inheritance option. If this symbol is defined in , it shall be defined to be -1, 0, or 200809L. The value of this symbol reported by sysconf() shall either be -1 or 200809L. _POSIX_THREAD_ROBUST_PRIO_PROTECT The implementation supports the Robust Mutex Priority Protection option. If this symbol is defined in , it shall be defined to be -1, 0, or 200809L. The value of this symbol reported by sysconf() shall either be -1 or 200809L. _POSIX_THREAD_SAFE_FUNCTIONS The implementation supports thread-safe functions. This symbol shall always be set to the value 200809L. _POSIX_THREAD_SPORADIC_SERVER The implementation supports the Thread Sporadic Server option. If this symbol is defined in , it shall be defined to be -1, 0, or 200809L. The value of this symbol reported by sysconf() shall either be -1 or 200809L. _POSIX_THREADS The implementation supports threads. This symbol shall always be set to the value 200809L. _POSIX_TIMEOUTS The implementation supports timeouts. This symbol shall always be set to the value 200809L. _POSIX_TIMERS The implementation supports timers. This symbol shall always be set to the value 200809L. _POSIX_TRACE The implementation supports the Trace option. If this symbol is defined in , it shall be defined to be -1, 0, or 200809L. The value of this symbol reported by sysconf() shall either be -1 or 200809L. _POSIX_TRACE_EVENT_FILTER The implementation supports the Trace Event Filter option. If this symbol is defined in , it shall be defined to be -1, 0, or 200809L. The value of this symbol reported by sysconf() shall either be -1 or 200809L. _POSIX_TRACE_INHERIT The implementation supports the Trace Inherit option. If this symbol is defined in , it shall be defined to be -1, 0, or 200809L. The value of this symbol reported by sysconf() shall either be -1 or 200809L. _POSIX_TRACE_LOG The implementation supports the Trace Log option. If this symbol is defined in , it shall be defined to be -1, 0, or 200809L. The value of this symbol reported by sysconf() shall either be -1 or 200809L. _POSIX_TYPED_MEMORY_OBJECTS The implementation supports the Typed Memory Objects option. If this symbol is defined in , it shall be defined to be -1, 0, or 200809L. The value of this symbol reported by sysconf() shall either be -1 or 200809L. _POSIX_V6_ILP32_OFF32 The implementation provides a C-language compilation environment with 32-bit int, long, pointer, and off_t types. _POSIX_V6_ILP32_OFFBIG The implementation provides a C-language compilation environment with 32-bit int, long, and pointer types and an off_t type using at least 64 bits. _POSIX_V6_LP64_OFF64 The implementation provides a C-language compilation environment with 32-bit int and 64-bit long, pointer, and off_t types. _POSIX_V6_LPBIG_OFFBIG The implementation provides a C-language compilation environment with an int type using at least 32 bits and long, pointer, and off_t types using at least 64 bits. [Option End] _POSIX_V7_ILP32_OFF32 The implementation provides a C-language compilation environment with 32-bit int, long, pointer, and off_t types. _POSIX_V7_ILP32_OFFBIG The implementation provides a C-language compilation environment with 32-bit int, long, and pointer types and an off_t type using at least 64 bits. _POSIX_V7_LP64_OFF64 The implementation provides a C-language compilation environment with 32-bit int and 64-bit long, pointer, and off_t types. _POSIX_V7_LPBIG_OFFBIG The implementation provides a C-language compilation environment with an int type using at least 32 bits and long, pointer, and off_t types using at least 64 bits. _POSIX2_C_BIND The implementation supports the C-Language Binding option. This symbol shall always have the value 200809L. _POSIX2_C_DEV The implementation supports the C-Language Development Utilities option. If this symbol is defined in , it shall be defined to be -1, 0, or 200809L. The value of this symbol reported by sysconf() shall either be -1 or 200809L. [Option End] _POSIX2_CHAR_TERM The implementation supports the Terminal Characteristics option. The value of this symbol reported by sysconf() shall either be -1 or a value greater than zero. _POSIX2_FORT_DEV The implementation supports the FORTRAN Development Utilities option. If this symbol is defined in , it shall be defined to be -1, 0, or 200809L. The value of this symbol reported by sysconf() shall either be -1 or 200809L. _POSIX2_FORT_RUN The implementation supports the FORTRAN Runtime Utilities option. If this symbol is defined in , it shall be defined to be -1, 0, or 200809L. The value of this symbol reported by sysconf() shall either be -1 or 200809L. _POSIX2_LOCALEDEF The implementation supports the creation of locales by the localedef utility. If this symbol is defined in , it shall be defined to be -1, 0, or 200809L. The value of this symbol reported by sysconf() shall either be -1 or 200809L. _POSIX2_PBS The implementation supports the Batch Environment Services and Utilities option. If this symbol is defined in , it shall be defined to be -1, 0, or 200809L. The value of this symbol reported by sysconf() shall either be -1 or 200809L. _POSIX2_PBS_ACCOUNTING The implementation supports the Batch Accounting option. If this symbol is defined in , it shall be defined to be -1, 0, or 200809L. The value of this symbol reported by sysconf() shall either be -1 or 200809L. _POSIX2_PBS_CHECKPOINT The implementation supports the Batch Checkpoint/Restart option. If this symbol is defined in , it shall be defined to be -1, 0, or 200809L. The value of this symbol reported by sysconf() shall either be -1 or 200809L. _POSIX2_PBS_LOCATE The implementation supports the Locate Batch Job Request option. If this symbol is defined in , it shall be defined to be -1, 0, or 200809L. The value of this symbol reported by sysconf() shall either be -1 or 200809L. _POSIX2_PBS_MESSAGE The implementation supports the Batch Job Message Request option. If this symbol is defined in , it shall be defined to be -1, 0, or 200809L. The value of this symbol reported by sysconf() shall either be -1 or 200809L. _POSIX2_PBS_TRACK The implementation supports the Track Batch Job Request option. If this symbol is defined in , it shall be defined to be -1, 0, or 200809L. The value of this symbol reported by sysconf() shall either be -1 or 200809L. _POSIX2_SW_DEV The implementation supports the Software Development Utilities option. If this symbol is defined in , it shall be defined to be -1, 0, or 200809L. The value of this symbol reported by sysconf() shall either be -1 or 200809L. _POSIX2_UPE The implementation supports the User Portability Utilities option. If this symbol is defined in , it shall be defined to be -1, 0, or 200809L. The value of this symbol reported by sysconf() shall either be -1 or 200809L. _XOPEN_CRYPT The implementation supports the X/Open Encryption Option Group. _XOPEN_ENH_I18N The implementation supports the Issue 4, Version 2 Enhanced Internationalization Option Group. This symbol shall always be set to a value other than -1. _XOPEN_REALTIME The implementation supports the X/Open Realtime Option Group. _XOPEN_REALTIME_THREADS The implementation supports the X/Open Realtime Threads Option Group. _XOPEN_SHM The implementation supports the Issue 4, Version 2 Shared Memory Option Group. This symbol shall always be set to a value other than -1. _XOPEN_STREAMS The implementation supports the XSI STREAMS Option Group. _XOPEN_UNIX The implementation supports the XSI option. _XOPEN_UUCP The implementation supports the UUCP Utilities option. If this symbol is defined in , it shall be defined to be -1, 0, or 200809L. The value of this symbol reported by sysconf() shall be either -1 or 200809L.

anothergroup / alibc

Unistd.h Constans for Options #76