The following diff adds support for sysconf(3) for the variable
_SC_HOST_NAME_MAX.
Based on bits from FreeBSD/NetBSD.
Run into this used by a few ports.
I took out the chunk with the minor bump since I heard there is
a major bump coming up.
Index: sys/sys/unistd.h
===================================================================
RCS file: /cvs/src/sys/sys/unistd.h,v
retrieving revision 1.17
diff -N -u -p sys/sys/unistd.h
--- sys/sys/unistd.h 15 Jan 2010 10:17:48 -0000 1.17
+++ sys/sys/unistd.h 25 Jun 2010 01:20:23 -0000
@@ -119,6 +119,7 @@
#define _SC_XOPEN_SHM 30
#define _SC_SEM_NSEMS_MAX 31
#define _SC_SEM_VALUE_MAX 32
+#define _SC_HOST_NAME_MAX 33
/* P1003.1c */
#define _SC_GETGR_R_SIZE_MAX 100
Index: lib/libc/gen/sysconf.3
===================================================================
RCS file: /home/cvs/src/lib/libc/gen/sysconf.3,v
retrieving revision 1.27
diff -u -p -r1.27 sysconf.3
--- lib/libc/gen/sysconf.3 22 Feb 2010 17:54:52 -0000 1.27
+++ lib/libc/gen/sysconf.3 25 Jun 2010 01:19:12 -0000
@@ -172,6 +172,8 @@ The level of support for thread-safe (re
The number of processors configured.
.It Li _SC_NPROCESSORS_ONLN
The number of processors online (capable of running processes).
+.It Li _SC_HOST_NAME_MAX
+The maximum size of a hostname, not counting NULL.
.El
.Sh RETURN VALUES
If the call to
Index: lib/libc/gen/sysconf.c
===================================================================
RCS file: /home/cvs/src/lib/libc/gen/sysconf.c,v
retrieving revision 1.11
diff -u -p -r1.11 sysconf.c
--- lib/libc/gen/sysconf.c 15 Jan 2010 08:35:47 -0000 1.11
+++ lib/libc/gen/sysconf.c 25 Jun 2010 01:17:54 -0000
@@ -214,6 +214,10 @@ yesno: if (sysctl(mib, namelen, &value,
namelen = 3;
break;
+/* Unsorted */
+ case _SC_HOST_NAME_MAX:
+ return (MAXHOSTNAMELEN - 1); /* does not include \0 */
+
/* Extensions */
case _SC_PHYS_PAGES:
{
--
This message has been scanned for viruses and
dangerous content by MailScanner, and is
believed to be clean.
