- Moved (u)mount prototypes from unistd.h to sys/mount.h.

- Prepared mount system call to accept multiple mount flags
   instead of just read_only (however, it remains backwards
   compatible).
 - Updated the man mount(2) to reflect new header file usage. 
 - Updated badblocks, newroot, mount, and umount commands to use the
   new header file.

lib/posix/_mount.c

@@ -3,7 +3,7 @@
 #define mount	_mount
 #define umount	_umount
 #include <string.h>
-#include <unistd.h>
+#include <sys/mount.h>
 #include <stdlib.h>
 #include <stdio.h>
 #include <sys/stat.h>
@@ -46,9 +46,9 @@ PRIVATE char *makelabel(_CONST char *special)
   return label;
 }
 
-PUBLIC int mount(special, name, rwflag, type, args)
+PUBLIC int mount(special, name, mountflags, type, args)
 char *name, *special, *type, *args;
-int rwflag;
+int mountflags;
 {
   int r;
   message m;
@@ -59,10 +59,12 @@ int rwflag;
   char cmd[200];
   FILE *pipe;
   int ep;
+  int reuse;
 
   /* Default values. */
   if (type == NULL) type = FSDEFAULT;
   if (args == NULL) args = "";
+  reuse = 0;
 
   /* Make FS process label for RS from special name. */
   if(!(label=makelabel(special))) {
@@ -93,6 +95,11 @@ int rwflag;
 	return -1;
   }
 
+  if(mountflags & MS_REUSE) {
+    reuse = 1;
+    mountflags &= ~MS_REUSE; /* Temporary: turn off to not confuse VFS */
+  }
+
   sprintf(cmd, _PATH_SERVICE " up %s -label '%s' -config " _PATH_DRIVERS_CONF
 	" -args '%s%s' -printep yes",
 	path, label, args[0] ? "-o " : "", args);
@@ -112,7 +119,7 @@ int rwflag;
   /* Now perform mount(). */
   m.m1_i1 = strlen(special) + 1;
   m.m1_i2 = strlen(name) + 1;
-  m.m1_i3 = rwflag;
+  m.m1_i3 = mountflags;
   m.m1_p1 = special;
   m.m1_p2 = name;
   m.m1_p3 = (char*) ep;