Document many of the missing posix.1b options.
PR: 20528 Submitted by: bms (original version) Requested by: mike (awhile ago)
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@ -67,78 +67,6 @@ The available values are as follows:
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.Pp
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.Bl -tag -width 6n
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.Pp
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.It Li _SC_ARG_MAX
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The maximum bytes of argument to
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.Xr execve 2 .
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.It Li _SC_CHILD_MAX
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The maximum number of simultaneous processes per user id.
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.It Li _SC_CLK_TCK
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The frequency of the statistics clock in ticks per second.
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.It Li _SC_IOV_MAX
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The maximum number of elements in the I/O vector used by
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.Xr readv 2 ,
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.Xr writev 2 ,
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.Xr recvmsg 2 ,
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and
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.Xr sendmsg 2 .
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.It Li _SC_NGROUPS_MAX
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The maximum number of supplemental groups.
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.It Li _SC_NPROCESSORS_CONF
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The number of processors configured.
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.It Li _SC_NPROCESSORS_ONLN
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The number of processors currently online.
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.It Li _SC_OPEN_MAX
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The maximum number of open files per user id.
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.It Li _SC_STREAM_MAX
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The minimum maximum number of streams that a process may have open
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at any one time.
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.It Li _SC_TZNAME_MAX
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The minimum maximum number of types supported for the name of a
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timezone.
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.It Li _SC_JOB_CONTROL
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Return 1 if job control is available on this system, otherwise \-1.
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.It Li _SC_SAVED_IDS
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Returns 1 if saved set-group and saved set-user ID is available,
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otherwise \-1.
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.It Li _SC_VERSION
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The version of
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.St -p1003.1
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with which the system
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attempts to comply.
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.It Li _SC_BC_BASE_MAX
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The maximum ibase/obase values in the
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.Xr bc 1
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utility.
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.It Li _SC_BC_DIM_MAX
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The maximum array size in the
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.Xr bc 1
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utility.
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.It Li _SC_BC_SCALE_MAX
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The maximum scale value in the
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.Xr bc 1
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utility.
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.It Li _SC_BC_STRING_MAX
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The maximum string length in the
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.Xr bc 1
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utility.
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.It Li _SC_COLL_WEIGHTS_MAX
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The maximum number of weights that can be assigned to any entry of
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the LC_COLLATE order keyword in the locale definition file.
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.It Li _SC_EXPR_NEST_MAX
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The maximum number of expressions that can be nested within
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parenthesis by the
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.Xr expr 1
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utility.
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.It Li _SC_LINE_MAX
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The maximum length in bytes of a text-processing utility's input
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line.
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.It Li _SC_RE_DUP_MAX
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The maximum number of repeated occurrences of a regular expression
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permitted when using interval notation.
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.It Li _SC_2_VERSION
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The version of
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.St -p1003.2
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with which the system attempts to comply.
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.It Li _SC_2_C_BIND
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Return 1 if the system's C-language development facilities support the
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C-Language Bindings Option, otherwise \-1.
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@ -164,6 +92,144 @@ otherwise \-1.
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.It Li _SC_2_UPE
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Return 1 if the system supports the User Portability Utilities Option,
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otherwise \-1.
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.It Li _SC_2_VERSION
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The version of
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.St -p1003.2
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with which the system attempts to comply.
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.It Li _SC_AIO_LISTIO_MAX
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The maximum number of POSIX asynchronous I/O operations supported.
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.It Li _SC_AIO_MAX
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The maximum number of outstanding asynchronous I/O operations supported.
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.It Li _SC_AIO_PRIO_DELTA_MAX
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The maximum amount by which a process can decrease its asynchronous
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I/O priority level from its own scheduling priority.
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.It Li _SC_ARG_MAX
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The maximum bytes of argument to
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.Xr execve 2 .
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.It Li _SC_ASYNCHRONOUS_IO
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Return 1 if the system supports Asynchronous I/O facilities as described in
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.St -p1003.1 ,
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otherwise \-1.
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.It Li _SC_ATEXIT_MAX
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The maximum number of functions that a process may register with the
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.Fn atexit
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function.
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.It Li _SC_BC_BASE_MAX
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The maximum ibase/obase values in the
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.Xr bc 1
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utility.
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.It Li _SC_BC_DIM_MAX
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The maximum array size in the
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.Xr bc 1
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utility.
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.It Li _SC_BC_SCALE_MAX
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The maximum scale value in the
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.Xr bc 1
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utility.
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.It Li _SC_BC_STRING_MAX
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The maximum string length in the
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.Xr bc 1
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utility.
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.It Li _SC_CHILD_MAX
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The maximum number of simultaneous processes per user id.
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.It Li _SC_CLK_TCK
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The frequency of the statistics clock in ticks per second.
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.It Li _SC_COLL_WEIGHTS_MAX
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The maximum number of weights that can be assigned to any entry of
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the LC_COLLATE order keyword in the locale definition file.
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.It Li _SC_DELAYTIMER_MAX
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The maximum number of timer expiration overruns permitted for each process.
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.It Li _SC_EXPR_NEST_MAX
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The maximum number of expressions that can be nested within
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parenthesis by the
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.Xr expr 1
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utility.
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.It Li _SC_FSYNC
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Return 1 if the system supports file synchronization, otherwise \-1.
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.It Li _SC_IOV_MAX
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The maximum number of iovec structures that one process may use with the
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.Fn readv
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and
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.Fn writev
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functions.
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.It Li _SC_IPV6
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Return 1 if the system supports Internet Protocol version 6, otherwise \-1.
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.It Li _SC_JOB_CONTROL
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Return 1 if job control is available on this system, otherwise \-1.
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.It Li _SC_LINE_MAX
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The maximum length in bytes of a text-processing utility's input
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line.
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.It Li _SC_MAPPED_FILES
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Return 1 if the system supports memory mapped files, otherwise \-1.
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.It Li _SC_MEMLOCK
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Return 1 if the system supports process memory locking, otherwise \-1.
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.It Li _SC_MEMLOCK_RANGE
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Return 1 if the system supports range memory locking, otherwise \-1.
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.It Li _SC_MEMORY_PROTECTION
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Return 1 if the system supports memory protection, otherwise \-1.
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.It Li _SC_MESSAGE_PASSING
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Return 1 if the system supports POSIX message queues, otherwise \-1.
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.It Li _SC_MQ_OPEN_MAX
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The maximum number of open POSIX message queues which a process may hold.
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.It Li _SC_NGROUPS_MAX
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The maximum number of supplemental groups.
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.It Li _SC_NPROCESSORS_CONF
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The number of processors configured.
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.It Li _SC_NPROCESSORS_ONLN
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The number of processors currently online.
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.It Li _SC_OPEN_MAX
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The maximum number of open files per user id.
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.It Li _SC_PAGE_SIZE
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This is a synonym for
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.Dv _SC_PAGESIZE .
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.It Li _SC_PAGESIZE
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The system memory page size.
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.It Li _SC_PRIORITIZED_IO
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Return 1 if the system supports POSIX prioritized I/O, otherwise \-1.
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.It Li _SC_PRIORITY_SCHEDULING
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Return 1 if the system supports POSIX priority scheduling, otherwise \-1.
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.It Li _SC_RAW_SOCKETS
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Return 1 if the system supports
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.Dv SOCK_RAW
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style raw sockets, otherwise \-1.
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.It Li _SC_RE_DUP_MAX
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The maximum number of repeated occurrences of a regular expression
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permitted when using interval notation.
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.It Li _SC_REALTIME_SIGNALS
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Return 1 if the system supports POSIX realtime signals, otherwise \-1.
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.It Li _SC_RTSIG_MAX
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The number of the highest POSIX realtime signal supported.
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.It Li _SC_SAVED_IDS
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Returns 1 if saved set-group and saved set-user ID is available,
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otherwise \-1.
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.It Li _SC_SEM_NSEMS_MAX
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The maximum number of POSIX semaphores that a process may have.
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.It Li _SC_SEM_VALUE_MAX
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The maximum value that a POSIX semaphore may have.
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.It Li _SC_SEMAPHORES
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Return 1 if the system supports POSIX semaphores, otherwise \-1.
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.It Li _SC_SHARED_MEMORY_OBJECTS
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Return 1 if the system supports POSIX shared memory objects, otherwise \-1.
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.It Li _SC_SIGQUEUE_MAX
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The maximum number of POSIX queued signals that a process may send and
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have pending at receiver(s) at any given time.
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.It Li _SC_STREAM_MAX
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The minimum maximum number of streams that a process may have open
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at any one time.
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.It Li _SC_SYNCHRONIZED_IO
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Return 1 if the system supports POSIX synchronized I/O, otherwise \-1.
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.It Li _SC_TIMER_MAX
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The maximum number of POSIX timers that a process may request.
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.It Li _SC_TIMERS
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Return 1 if the system supports POSIX timers, otherwise \-1.
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.It Li _SC_TZNAME_MAX
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The minimum maximum number of types supported for the name of a
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timezone.
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.It Li _SC_VERSION
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The version of
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.St -p1003.1
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with which the system
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attempts to comply.
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.El
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.Sh RETURN VALUES
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If the call to
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