- 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.

commands/simple/badblocks.c

@@ -25,6 +25,7 @@
 #include <minix/type.h>
 #include <fcntl.h>
 #include <unistd.h>
+#include <sys/mount.h>
 #include <dirent.h>
 #include <stdlib.h>
 

commands/simple/mount.c

@@ -6,7 +6,7 @@
 #include <stdlib.h>
 #include <dirent.h>
 #include <string.h>
-#include <unistd.h>
+#include <sys/mount.h>
 #include <fcntl.h>
 #include <minix/config.h>
 #include <minix/const.h>

commands/simple/newroot.c

@@ -8,7 +8,7 @@ Replace the current root with a new one
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#include <unistd.h>
+#include <sys/mount.h>
 
 int main(int argc, char *argv[])
 {

commands/simple/umount.c

@@ -13,6 +13,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
+#include <sys/mount.h>
 #include <stdio.h>
 
 _PROTOTYPE(int main, (int argc, char **argv));

include/sys/mount.h

@@ -0,0 +1,21 @@
+/* <sys/mount.h>
+ * definitions for mount(2) 
+ */
+
+#ifndef _MOUNT_H
+#define _MOUNT_H
+
+#define MS_RDONLY	0x001	/* Mount device read only */
+#define MS_REUSE	0x002	/* Tell RS to try reusing binary from memory */
+
+
+/* Function Prototypes. */
+#ifndef _ANSI_H
+#include <ansi.h>
+#endif
+
+_PROTOTYPE( int mount, (char *_spec, char *_name, int _mountflags,
+                                                char *type, char *args) );
+_PROTOTYPE( int umount, (const char *_name)                             );
+
+#endif /* _MOUNT_H */

include/unistd.h

@@ -171,13 +171,10 @@ _PROTOTYPE( int mknod, (const char *_name, _mnx_Mode_t _mode, Dev_t _addr)	);
 _PROTOTYPE( int mknod4, (const char *_name, _mnx_Mode_t _mode, Dev_t _addr,
 	    long _size)							);
 _PROTOTYPE( char *mktemp, (char *_template)				);
-_PROTOTYPE( int mount, (char *_spec, char *_name, int _flag,
-						char *type, char *args)	);
 _PROTOTYPE( long ptrace, (int _req, pid_t _pid, long _addr, long _data)	);
 _PROTOTYPE( char *sbrk, (int _incr)					);
 _PROTOTYPE( int sync, (void)						);
 _PROTOTYPE( int fsync, (int fd)						);
-_PROTOTYPE( int umount, (const char *_name)				);
 _PROTOTYPE( int reboot, (int _how, ...)					);
 _PROTOTYPE( int gethostname, (char *_hostname, size_t _len)		);
 _PROTOTYPE( int getdomainname, (char *_domain, size_t _len)		);

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;

man/man2/mount.2

@@ -4,10 +4,9 @@ mount, umount \- mount or umount a file system
 .SH SYNOPSIS
 .ft B
 .nf
-#include <unistd.h>
 #include <sys/mount.h>
 
-int mount(char *\fIspecial\fP, char *\fIname\fP, int \fIflag\fP, char *\fItype\fP, char *\fIargs\fP)
+int mount(char *\fIspecial\fP, char *\fIname\fP, int \fImountflags\fP, char *\fItype\fP, char *\fIargs\fP)
 int umount(char *\fIname\fP)
 .fi
 .ft P