[PATCH] POSIX01: implement mandatory constants in limits.h

[Andy Shevchenko <andy.shevchenko%gmail.com@localhost>]

Implement mandatory _POSIX_SYMLOOP_MAX and _POSIX_HOST_NAME_MAX constants. So,
MAXSYMLINKS and MAXHOSTNAMELEN should be synchronized somehow with them.
---
 include/limits.h |    2 ++
 sys/sys/param.h  |    3 +++
 2 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/include/limits.h b/include/limits.h
index ea8d96d..7a1985b 100644
--- a/include/limits.h
+++ b/include/limits.h
@@ -42,6 +42,7 @@
 #define        _POSIX_AIO_MAX          1
 #define        _POSIX_ARG_MAX          4096
 #define        _POSIX_CHILD_MAX        25
+#define        _POSIX_HOST_NAME_MAX    255
 #define        _POSIX_LINK_MAX         8
 #define        _POSIX_LOGIN_NAME_MAX   9
 #define        _POSIX_MAX_CANON        255
@@ -57,6 +58,7 @@
 #define        _POSIX_SSIZE_MAX        32767
 #define        _POSIX_STREAM_MAX       8
 #define        _POSIX_SYMLINK_MAX      255
+#define        _POSIX_SYMLOOP_MAX      8
 #define        _POSIX_THREAD_DESTRUCTOR_ITERATIONS     4
 #define        _POSIX_THREAD_KEYS_MAX  128
 #define        _POSIX_THREAD_THREADS_MAX               64
diff --git a/sys/sys/param.h b/sys/sys/param.h
index 561938b..e97e885 100644
--- a/sys/sys/param.h
+++ b/sys/sys/param.h
@@ -94,6 +94,7 @@
  * Redefined constants are from POSIX 1003.1 limits file.
  *
  * MAXCOMLEN should be >= sizeof(ac_comm) (see <acct.h>)
+ * MAXHOSTNAMELEN should be >= (_POSIX_HOST_NAME_MAX + 1) (see <limits.h>)
  * MAXLOGNAME should be >= UT_NAMESIZE (see <utmp.h>)
  */
 #include <sys/syslimits.h>
@@ -310,6 +311,8 @@
  * maximum number of symbolic links that may be expanded in a path name.
  * It should be set high enough to allow all legitimate uses, but halt
  * infinite loops reasonably quickly.
+ *
+ * MAXSYMLINKS should be >= _POSIX_SYMLOOP_MAX (see <limits.h>)
  */
 #define        MAXPATHLEN      PATH_MAX
 #define        MAXSYMLINKS     32
-- 
1.5.2.5