| Name | Data Type | Qualifiers |
| Name | Data Type | Value | Scope | Flavors |
| ArgMax | uint64 |
| Description | string | Maximum length of argument to the exec functions including environment data. Minimum Acceptable Value: _POSIX_ARG_MAX(4096). sysconf returns this variable when _SC_ARG_MAX is passed to it. | None | TRANSLATABLE= true |
| AtexitMax | uint64 |
| Description | string | Maximum number of functions that may be registered with atexit(). Minimum Acceptable Value: 32 sysconf returns this variable when _SC_ATEXIT_MAX is passed to it. | None | TRANSLATABLE= true |
| ChildMax | uint64 |
| Description | string | Maximum number of simultaneous processes per real user ID. Minimum Acceptable Value: 25. sysconf returns this variable when _SC_CHILD_MAX is passed to it. | None | TRANSLATABLE= true |
| ClkTck | uint64 |
| Description | string | Number of clock ticks per second returned by the times() function. sysconf returns this variable when _SC_CLK_TCK is passed to it. | None | TRANSLATABLE= true |
| CollWeightsMax | uint64 |
| Description | string | Maximum number of weights that can be assigned to an entry of the LC_COLLATE order keyword in the locale definition file; see the XBD specification, Locale. Minimum Acceptable Value: _POSIX2_COLL_WEIGHTS_MAX(2). sysconf returns this variable when _SC_COLL_WEIGHTS_MAX is passed to it. | None | TRANSLATABLE= true |
| DelayTimerMax | uint64 |
| Description | string | Maximum number of timer expiration overruns. Minimum Acceptable Value: _POSIX_DELAYTIMER_MAX(32) sysconf returns this variable when _SC_DELAYTIMER_MAX is passed to it. | None | TRANSLATABLE= true |
| LineMax | uint64 |
| Description | string | The maximum length, in bytes, of a utility's input line (either standard input or another file), when the utility is described as processing text files. The length includes room for the trailing newline. Minimum Acceptable Value: _POSIX2_LINE_MAX(2048) sysconf returns this variable when _SC_LINE_MAX is passed to it. | None | TRANSLATABLE= true |
| LoginNameMax | uint64 |
| Description | string | Maximum length of a login name. Minimum Acceptable Value: _POSIX_LOGIN_NAME_MAX(9) sysconf returns this variable when _SC_LOGIN_NAME_MAX is passed to it. | None | TRANSLATABLE= true |
| MqPrioMax | uint64 |
| Description | string | The maximum number of message priorities supported by the implementation. Minimum Acceptable Value: _POSIX_MQ_PRIO_MAX(32) sysconf returns this variable when _SC_MQ_PRIO_MAX is passed to it. | None | TRANSLATABLE= true |
| NssBufLenGroup | uint64 |
| Description | string | Maximum size of group entry buffer. sysconf returns this variable when _SC_GETGR_R_SIZE_MAX is passed to it. | None | TRANSLATABLE= true |
| NssBufLenPassWd | uint64 |
| Description | string | Maximum size of password entry buffer. sysconf returns this variable when _SC_GETPW_R_SIZE_MAX is passed to it. | None | TRANSLATABLE= true |
| PAGE_SIZE | uint64 |
| Description | string | Same as PAGESIZE. If either PAGESIZE or PAGE_SIZE is defined, the other will be defined with the same value. sysconf returns this variable when _SC_PAGE_SIZE is passed to it. | None | TRANSLATABLE= true |
| PageSize | uint64 |
| Description | string | Size in bytes of a page. Minimum Acceptable Value: 1 sysconf returns this variable when _SC_PAGESIZE is passed to it. | None | TRANSLATABLE= true |
| PassMax | uint64 |
| Description | string | Maximum number of significant bytes in a password (not including terminating null). (LEGACY) Minimum Acceptable Value: 8 sysconf returns this variable when _SC_PASS_MAX is passed to it. | None | TRANSLATABLE= true |
| ReDupMax | uint64 |
| Description | string | Maximum number of repeated occurrences of a regular expression permitted when using the interval notation {m,n}; see the XBD specification, Regular Expressions. Minimum Acceptable Value: POSIX2_RE_DUP_MAX(255) sysconf returns this variable when _SC_RE_DUP_MAX is passed to it. | None | TRANSLATABLE= true |
| RtsigMax | uint64 |
| Description | string | Maximum number of realtime signals reserved for application use in this implementation. Minimum Acceptable Value: _POSIX_RTSIG_MAX(8) sysconf returns this variable when _SC_RTSIG_MAX is passed to it. | None | TRANSLATABLE= true |
| SemValueMax | uint64 |
| Description | string | The maximum value a semaphore may have. Minimum Acceptable Value: _POSIX_SEM_VALUE_MAX(32767) sysconf returns this variable when _SC_SEM_VALUE_MAX is passed to it. | None | TRANSLATABLE= true |
| TtyNameMax | uint64 |
| Description | string | Maximum length of terminal device name. Minimum Acceptable Value: _POSIX_TTY_NAME_MAX(9) sysconf returns this variable when _SC_TTY_NAME_MAX is passed to it. | None | TRANSLATABLE= true |
| TZNameMax | uint64 |
| Description | string | Maximum number of bytes supported for the name of a time zone (not of the TZ variable). Minimum Acceptable Value: _POSIX_TZNAME_MAX(3) sysconf returns this variable when _SC_TZNAME_MAX is passed to it. | None | TRANSLATABLE= true |