New struct statfs with mount options. NOTE: this replaces statfs(2),

fstatfs(2), and getfsstat(2) so you will need to build a new kernel
before doing a "make build" or you will get "unimplemented syscall" errors.

The new struct statfs has the following featuires:
o Has a u_int32_t flags field--now softdep can have a real flag.

o Uses u_int32_t instead of longs (nicer on the alpha).  Note: the man
page used to lie about setting invalid/unused fields to -1.  SunOS does
that but our code never has.

o Gets rid of f_type completely.  It hasn't been used since NetBSD 0.9
and having it there but always 0 is confusing.  It is conceivable
that this may cause some old code to not compile but that is better
than silently breaking.

o Adds a mount_info union that contains the FSTYPE_args struct.  This
means that "mount" can now tell you all the options a filesystem was
mounted with.  This is especially nice for NFS.

Other changes:
o The linux statfs emulation didn't convert between BSD fs names
  and linux f_type numbers.  Now it does, since the BSD f_type
  number is useless to linux apps (and has been removed anyway)

o FreeBSD's struct statfs is different from our (both old and new)
and thus needs conversion.  Previously, the OpenBSD syscalls
were used without any real translation.

o mount(8) will now show extra info when invoked with no arguments.
However, to see *everything* you need to use the -v (verbose) flag.

1 files changed, 19 insertions, 20 deletions

diff --git a/lib/libc/sys/statfs.2 b/lib/libc/sys/statfs.2
index c48361f1cbe..3b80f94e48b 100644
--- a/lib/libc/sys/statfs.2
+++ b/lib/libc/sys/statfs.2
@@ -1,4 +1,4 @@
-.\"	$OpenBSD: statfs.2,v 1.9 1999/04/18 17:26:52 espie Exp $
+.\"	$OpenBSD: statfs.2,v 1.10 1999/05/31 17:34:41 millert Exp $
 .\"	$NetBSD: statfs.2,v 1.10 1995/06/29 11:40:48 cgd Exp $
 .\"
 .\" Copyright (c) 1989, 1991, 1993
@@ -59,31 +59,30 @@ structure defined as follows:
 .Bd -literal
 typedef struct { int32_t val[2]; } fsid_t;
 
-#define MFSNAMELEN   16 /* length of fs type name, including nul */
+#define MFSNAMELEN   16 /* length of fs type name, including NUL */
 #define MNAMELEN     32	/* length of buffer for returned name */
 
 struct statfs {
-    short   f_type;	/* type of file system (unused; zero) */
-    short   f_flags;	/* copy of mount flags */
-    long    f_bsize;	/* fundamental file system block size */
-    long    f_iosize;	/* optimal transfer block size */
-    long    f_blocks;	/* total data blocks in file system */
-    long    f_bfree;	/* free blocks in fs */
-    long    f_bavail;	/* free blocks avail to non-superuser */
-    long    f_files;	/* total file nodes in file system */
-    long    f_ffree;	/* free file nodes in fs */
-    fsid_t  f_fsid;	/* file system id (super-user only) */
-    uid_t   f_owner;	/* user that mounted the file system */
-    long    f_syncwrites; /* count of sync writes since mount */
-    long    f_asyncwrites; /* count of async writes since mount */
-    long    f_spare[2];	/* spare for later */
-    char    f_fstypename[MFSNAMELEN]; /* fs type name */
-    char    f_mntonname[MNAMELEN];    /* directory on which mounted */
-    char    f_mntfromname[MNAMELEN];  /* mounted file system */
+    u_int32_t  f_flags;       /* copy of mount flags */
+    u_int32_t  f_bsize;       /* fundamental file system block size */
+    u_int32_t  f_iosize;      /* optimal transfer block size */
+    u_int32_t  f_blocks;      /* total data blocks in file system */
+    u_int32_t  f_bfree;       /* free blocks in fs */
+    u_int32_t  f_bavail;      /* free blocks avail to non-superuser */
+    u_int32_t  f_files;       /* total file nodes in file system */
+    u_int32_t  f_ffree;       /* free file nodes in fs */
+    fsid_t     f_fsid;        /* file system id */
+    uid_t      f_owner;       /* user that mounted the file system */
+    u_int32_t  f_syncwrites;  /* count of sync writes since mount */
+    u_int32_t  f_asyncwrites; /* count of async writes since mount */
+    u_int32_t  f_spare[4];    /* spare for later */
+    char       f_fstypename[MFSNAMELEN]; /* fs type name */
+    char       f_mntonname[MNAMELEN];    /* directory on which mounted */
+    char       f_mntfromname[MNAMELEN];  /* mounted file system */
+    union mount_info mount_info;         /* per-filesystem mount options */
 };
 .Ed
 .Pp
-Fields that are undefined for a particular file system are set to -1.
 .Fn fstatfs
 returns the same information about an open file referenced by descriptor
 .Fa fd .