At the time this book was written, none of our test systems claimed to be fully compliant with even the base of this version of this POSIX standard. Table 1.3 on page 19 shows the POSIX extensions that seem to be supported by our test systems. That is, the documentation agrees with the POSIX standard and the programs from the book behave correctly. Until these systems claim compliance, we must take this on faith.
Table E.1. POSIX extensions. If the symbol is defined in unistd.h, the system supports the corresponding POSIX extension.
|
ADV | _POSIX_ADVISORY_INFO | advisory information |
AIO | _POSIX_ASYNCHRONOUS_IO | asynchronous input and output |
BAR | _POSIX_BARRIERS | barriers |
BE | _POSIX2_PBS | batch environment services and utilities |
CD | _POSIX2_C_DEV | C-language development utilities |
CPT | _POSIX_CPUTIME | process CPU-time clocks |
CS | _POSIX_CLOCK_SELECTION | clock selection |
CX | | extension to the ISO C standard (required) |
FD | _POSIX2_FORT_DEV | FORTRAN development utilities |
FR | _POSIX2_FORT_RUN | FORTRAN runtime utilities |
FSC | _POSIX_FSYNC | file synchronization |
IP6 | | IPV6 |
MC1 | | shorthand for ADV and either MF or SHM |
MC2 | | shorthand for MF, SHM or MPR |
| _POSIX_JOB_CONTROL | job control (required) |
MF | _POSIX_MAPPED_files | memory mapped files |
ML | _POSIX_MEMLOCK | process memory locking |
MLR | _POSIX_MEMLOCK_RANGE | range memory locking |
MON | _POSIX_MONOTONIC_CLOCK | monotonic clock |
MPR | _POSIX_MEMORY_PROTECTION | memory protection |
MSG | _POSIX_MESSAGE_PASSING | message passing |
MX | | IEC 60559 floating-point option |
OB | | obsolescent |
OF | | output format incompletely specified |
OH | | optional header |
PIO | _POSIX_PRIORITIZED_IO | prioritized input and output |
PS | _POSIX_PRIORITY_SCHEDULING | processing scheduling |
RTS | _POSIX_REALTIME_SIGNALS | realtime signals |
SD | _POSIX2_SW_DEV | software development utilities |
| _POSIX_SAVED_IDS | process has saved set-user-ID (required) |
SEM | _POSIX_SEMAPHORES | semaphores |
SHM | _POSIX_SHARED_MEMORY_OBJECTS | shared memory objects |
SIO | _POSIX_SYNCHRONIZED_IO | synchronized input and output |
SPI | _POSIX_SPIN_LOCKS | spin locks |
SPN | _POSIX_SPAWN | spawn |
SS | _POSIX_SPORADIC_SERVER | process sporadic server |
TCT | _POSIX_THREAD_CPUTIME | thread CPU-time clocks |
TEF | _POSIX_TRACE_EVENT_FILTER | trace event filter |
THR | _POSIX_THREADS | threads |
TMO | _POSIX_TIMEOUTS | timeouts |
TMR | _POSIX_TIMERS | timers |
TPI | _POSIX_PRIO_INHERIT | thread priority inheritance |
TPP | _POSIX_PRIO_PROTECT | thread priority protection |
TPS | _POSIX_PRIORITY_SCHEDULING | thread execution scheduling |
TRC | _POSIX_TRACE | trace |
TRI | _POSIX_TRACE_INHERIT | trace inherit |
TRL | _POSIX_TRACE_LOG | trace log |
TSA | _POSIX_THREAD_ATTR_STACKADDR | thread stack address attribute |
TSF | _POSIX_THREAD_SAFE_FUNCTIONS | thread-safe functions |
TSH | _POSIX_THREAD_PROCESS_SHARED | thread process-shared synchronization |
TSP | _POSIX_THREAD_SPORADIC_SERVER | thread sporadic server |
TSS | _POSIX_THREAD_ATTR_STACKSIZE | thread stack address size |
TYM | _POSIX_TYPED_MEMORY_OBJECTS | typed memory objects |
UP | _POSIX2_UPE | user portability utilities |
XSI | _XOPEN_UNIX | XSI |
XSR | _XOPEN_STREAMS | XSR streams |