Fix some _POSIX minimum/maximum values in limits.h:

* Some values changed in POSIX.1-2001; provide the former value if a program
  requests compliance to an earlier version of POSIX. [1]
* Add missing _POSIX_CLOCKRES_MIN constant. This is a maximum value but
  otherwise works the same as the minimum values.

PR:		standards/104743
Submitted by:	bde [1] (not exact #ifdefs, but the values)
MFC after:	2 weeks

1 files changed, 15 insertions, 4 deletions

diff --git a/include/limits.h b/include/limits.h
index 9828ab6..b30c504 100644
--- a/include/limits.h
+++ b/include/limits.h
@@ -37,18 +37,27 @@
 
 #if __POSIX_VISIBLE
 #define	_POSIX_ARG_MAX		4096
-#define	_POSIX_CHILD_MAX	25
 #define	_POSIX_LINK_MAX		8
 #define	_POSIX_MAX_CANON	255
 #define	_POSIX_MAX_INPUT	255
 #define	_POSIX_NAME_MAX		14
-#define	_POSIX_NGROUPS_MAX	8
-#define	_POSIX_OPEN_MAX		20
-#define	_POSIX_PATH_MAX		256
 #define	_POSIX_PIPE_BUF		512
 #define	_POSIX_SSIZE_MAX	32767
 #define	_POSIX_STREAM_MAX	8
+
+#if __POSIX_VISIBLE >= 200112
+#define	_POSIX_CHILD_MAX	25
+#define	_POSIX_NGROUPS_MAX	8
+#define	_POSIX_OPEN_MAX		20
+#define	_POSIX_PATH_MAX		256
 #define	_POSIX_TZNAME_MAX	6
+#else
+#define	_POSIX_CHILD_MAX	6
+#define	_POSIX_NGROUPS_MAX	0
+#define	_POSIX_OPEN_MAX		16
+#define	_POSIX_PATH_MAX		255
+#define	_POSIX_TZNAME_MAX	3
+#endif
 
 #define	BC_BASE_MAX		   99	/* max ibase/obase values in bc(1) */
 #define	BC_DIM_MAX		 2048	/* max array elements in bc(1) */
@@ -80,6 +89,8 @@
 #define	_POSIX_SEM_VALUE_MAX	32767
 #define	_POSIX_SIGQUEUE_MAX	32
 #define	_POSIX_TIMER_MAX	32
+
+#define	_POSIX_CLOCKRES_MIN	20000000
 #endif
 
 #if __POSIX_VISIBLE >= 199506