| _SC_ARG_MAX
|
| |
The maximum bytes of argument to
execve(2).
|
| _SC_CHILD_MAX
|
| |
The maximum number of simultaneous processes per user id.
|
| _SC_CLK_TCK
|
| |
The frequency of the statistics clock in ticks per second.
|
| _SC_IOV_MAX
|
| |
The maximum number of elements in the I/O vector used by
readv(2),
writev(2),
recvmsg(2),
and
sendmsg(2).
|
| _SC_NGROUPS_MAX
|
| |
The maximum number of supplemental groups.
|
| _SC_NPROCESSORS_CONF
|
| |
The number of processors configured.
|
| _SC_NPROCESSORS_ONLN
|
| |
The number of processors currently online.
|
| _SC_OPEN_MAX
|
| |
One more than the maximum value the system may assign to a new file descriptor.
|
| _SC_PAGESIZE
|
| |
The size of a system page in bytes.
|
| _SC_PAGE_SIZE
|
| |
Equivalent to
_SC_PAGESIZE.
|
| _SC_STREAM_MAX
|
| |
The minimum maximum number of streams that a process may have open
at any one time.
|
| _SC_TZNAME_MAX
|
| |
The minimum maximum number of types supported for the name of a
timezone.
|
| _SC_JOB_CONTROL
|
| |
Return 1 if job control is available on this system, otherwise -1.
|
| _SC_SAVED_IDS
|
| |
Returns 1 if saved set-group and saved set-user ID is available,
otherwise -1.
|
| _SC_VERSION
|
| |
The version of
IEEE Std 1003.1 ("POSIX.1")
with which the system
attempts to comply.
|
| _SC_BC_BASE_MAX
|
| |
The maximum ibase/obase values in the
bc(1)
utility.
|
| _SC_BC_DIM_MAX
|
| |
The maximum array size in the
bc(1)
utility.
|
| _SC_BC_SCALE_MAX
|
| |
The maximum scale value in the
bc(1)
utility.
|
| _SC_BC_STRING_MAX
|
| |
The maximum string length in the
bc(1)
utility.
|
| _SC_COLL_WEIGHTS_MAX
|
| |
The maximum number of weights that can be assigned to any entry of
the LC_COLLATE order keyword in the locale definition file.
|
| _SC_EXPR_NEST_MAX
|
| |
The maximum number of expressions that can be nested within
parenthesis by the
expr(1)
utility.
|
| _SC_LINE_MAX
|
| |
The maximum length in bytes of a text-processing utility's input
line.
|
| _SC_RE_DUP_MAX
|
| |
The maximum number of repeated occurrences of a regular expression
permitted when using interval notation.
|
| _SC_2_VERSION
|
| |
The version of
IEEE Std 1003.2 ("POSIX.2")
with which the system attempts to comply.
|
| _SC_2_C_BIND
|
| |
Return 1 if the system's C-language development facilities support the
C-Language Bindings Option, otherwise -1.
|
| _SC_2_C_DEV
|
| |
Return 1 if the system supports the C-Language Development Utilities Option,
otherwise -1.
|
| _SC_2_CHAR_TERM
|
| |
Return 1 if the system supports at least one terminal type capable of
all operations described in
IEEE Std 1003.2 ("POSIX.2"),
otherwise -1.
|
| _SC_2_FORT_DEV
|
| |
Return 1 if the system supports the FORTRAN Development Utilities Option,
otherwise -1.
|
| _SC_2_FORT_RUN
|
| |
Return 1 if the system supports the FORTRAN Runtime Utilities Option,
otherwise -1.
|
| _SC_2_LOCALEDEF
|
| |
Return 1 if the system supports the creation of locales, otherwise -1.
|
| _SC_2_SW_DEV
|
| |
Return 1 if the system supports the Software Development Utilities Option,
otherwise -1.
|
| _SC_2_UPE
|
| |
Return 1 if the system supports the User Portability Utilities Option,
otherwise -1.
|
| _SC_AIO_LISTIO_MAX
|
| |
Maximum number of I/O operations in a single list I/O call supported.
|
| _SC_AIO_MAX
|
| |
Maximum number of outstanding asynchronous I/O operations supported.
|
| _SC_AIO_PRIO_DELTA_MAX
|
| |
The maximum amount by which a process can decrease its asynchronous I/O
priority level from its own scheduling priority.
|
| _SC_DELAYTIMER_MAX
|
| |
Maximum number of timer expiration overruns.
|
| _SC_MQ_OPEN_MAX
|
| |
The maximum number of open message queue descriptors a process may hold.
|
| _SC_RTSIG_MAX
|
| |
Maximum number of realtime signals reserved for application use.
|
| _SC_SEM_NSEMS_MAX
|
| |
Maximum number of semaphores that a process may have.
|
| _SC_SEM_VALUE_MAX
|
| |
The maximum value a semaphore may have.
|
| _SC_SIGQUEUE_MAX
|
| |
Maximum number of queued signals that a process may send and have pending at
the receiver(s) at any time.
|
| _SC_TIMER_MAX
|
| |
Maximum number of timers per process supported.
|
| _SC_GETGR_R_SIZE_MAX
|
| |
Suggested initial value for the size of the group entry buffer.
|
| _SC_GETPW_R_SIZE_MAX
|
| |
Suggested initial value for the size of the password entry buffer.
|
| _SC_HOST_NAME_MAX
|
| |
Maximum length of a host name (not including the terminating null) as
returned from the
gethostname()
function.
|
| _SC_LOGIN_NAME_MAX
|
| |
Maximum length of a login name.
|
| _SC_THREAD_STACK_MIN
|
| |
Minimum size in bytes of thread stack storage.
|
| _SC_THREAD_THREADS_MAX
|
| |
Maximum number of threads that can be created per process.
|
| _SC_TTY_NAME_MAX
|
| |
Maximum length of terminal device name.
|
| _SC_SYMLOOP_MAX
|
| |
Maximum number of symbolic links that can be reliably traversed in the
resolution of a pathname in the absence of a loop.
|
| _SC_ATEXIT_MAX
|
| |
Maximum number of functions that may be registered with
atexit().
|
| _SC_XOPEN_VERSION
|
| |
An integer value greater than or equal to 4,
indicating the version of the X/Open Portability Guide to which this
system conforms.
|
| _SC_XOPEN_XCU_VERSION
|
| |
An integer value indicating the version of the XCU Specification to which
this system conforms.
|
|
