add sysctl and sysconf support for sysvsem, sysvshm, sysvmsg, and fsync; mostly from kleink

3 files changed, 40 insertions, 3 deletions

diff --git a/lib/libc/gen/sysconf.3 b/lib/libc/gen/sysconf.3
index cfa55b9ed1e..1bb9606077d 100644
--- a/lib/libc/gen/sysconf.3
+++ b/lib/libc/gen/sysconf.3
@@ -1,4 +1,4 @@
-.\"	$OpenBSD: sysconf.3,v 1.3 1996/08/19 08:26:22 tholo Exp $
+.\"	$OpenBSD: sysconf.3,v 1.4 1998/06/02 06:10:24 deraadt Exp $
 .\"
 .\" Copyright (c) 1993
 .\"	The Regents of the University of California.  All rights reserved.
@@ -142,6 +142,10 @@ otherwise \-1.
 .It Li _SC_2_UPE
 Return 1 if the system supports the User Portability Utilities Option,
 otherwise \-1.
+.It Li _SC_PAGESIZE
+The size of a system page in bytes.
+.It Li _SC_FSYNC
+Return 1 if the system supports the File Synchronisation Option, otherwise \-1.
 .El
 .Sh RETURN VALUES
 If the call to
diff --git a/lib/libc/gen/sysconf.c b/lib/libc/gen/sysconf.c
index 49bd847aeff..3be23f90bc0 100644
--- a/lib/libc/gen/sysconf.c
+++ b/lib/libc/gen/sysconf.c
@@ -35,7 +35,7 @@
  */
 
 #if defined(LIBC_SCCS) && !defined(lint)
-static char rcsid[] = "$OpenBSD: sysconf.c,v 1.3 1996/09/15 09:31:06 tholo Exp $";
+static char rcsid[] = "$OpenBSD: sysconf.c,v 1.4 1998/06/02 06:10:26 deraadt Exp $";
 #endif /* LIBC_SCCS and not lint */
 
 #include <sys/param.h>
@@ -105,6 +105,16 @@ sysconf(name)
 		mib[1] = KERN_POSIX1;
 		break;
 
+/* 1003.1b */
+	case _SC_PAGESIZE:
+		mib[0] = CTL_HW;
+		mib[1] = HW_PAGESIZE;
+		break;
+	case _SC_FSYNC:
+		mib[0] = CTL_KERN;
+		mib[1] = KERN_FSYNC;
+		goto yesno;
+
 /* 1003.2 */
 	case _SC_BC_BASE_MAX:
 		mib[0] = CTL_USER;
@@ -173,6 +183,13 @@ sysconf(name)
 	case _SC_2_UPE:
 		mib[0] = CTL_USER;
 		mib[1] = USER_POSIX2_UPE;
+		goto yesno;
+
+/* XPG 4.2 */
+	case _SC_XOPEN_SHM:
+		mib[0] = CTL_KERN;
+		mib[1] = KERN_SYSVSHM;
+
 yesno:		if (sysctl(mib, 2, &value, &len, NULL, 0) == -1)
 			return (-1);
 		if (value == 0)
diff --git a/lib/libc/gen/sysctl.3 b/lib/libc/gen/sysctl.3
index bc4324df699..86a2cf3cf80 100644
--- a/lib/libc/gen/sysctl.3
+++ b/lib/libc/gen/sysctl.3
@@ -1,4 +1,4 @@
-.\"	$OpenBSD: sysctl.3,v 1.8 1997/10/02 03:01:15 angelos Exp $
+.\"	$OpenBSD: sysctl.3,v 1.9 1998/06/02 06:10:27 deraadt Exp $
 .\"
 .\" Copyright (c) 1993
 .\"	The Regents of the University of California.  All rights reserved.
@@ -232,6 +232,7 @@ information.
 .It KERN\_CLOCKRATE	struct clockinfo	no
 .It KERN\_DOMAINNAME	string	yes
 .It KERN\_FILE	struct file	no
+.It KERN\_FSYNC		integer	no
 .It KERN\_HOSTID	integer	yes
 .It KERN\_HOSTNAME	string	yes
 .It KERN\_JOB\_CONTROL	integer	no
@@ -256,6 +257,9 @@ information.
 .It KERN\_RAWPARTITION	integer	no
 .It KERN\_SAVED\_IDS	integer	no
 .It KERN\_SECURELVL	integer	raise only
+.It KERN\_SYSVMSG	integer	no
+.It KERN\_SYSVSEM	integer	no
+.It KERN\_SYSVSHM	integer	no
 .It KERN\_VDISABLE	integer	no
 .It KERN\_VERSION	string	no
 .It KERN\_VNODE	struct vnode	no
@@ -290,6 +294,9 @@ The returned data consists of a single
 followed by an array of
 .Va struct file ,
 whose size depends on the current number of such objects in the system.
+.It Li KERN_FSYNC
+Return 1 if the File Synchronisation Option is available on this system,
+otherwise 0.
 .It Li KERN_HOSTID
 Get or set the host id.
 .It Li KERN_HOSTNAME
@@ -388,6 +395,15 @@ Returns 1 if saved set-group and saved set-user ID is available.
 The system security level.
 This level may be raised by processes with appropriate privilege.
 It may only be lowered by process 1.
+.It Li KERN_SYSVMSG
+Returns 1 if System V style message queue functionality is available on this
+system, otherwise 0.
+.It Li KERN_SYSVSEM
+Returns 1 if System V style semaphore functionality is available on this
+system, otherwise 0.
+.It Li KERN_SYSVSHM
+Returns 1 if System V style share memory functionality is available on this
+system, otherwise 0.
 .It Li KERN_VDISABLE
 Returns the terminal character disabling value.
 .It Li KERN_VERSION