Added lsvfs command to show loaded VFS modules (including statically-linked

ones).

3 files changed, 107 insertions, 0 deletions

diff --git a/usr.bin/lsvfs/Makefile b/usr.bin/lsvfs/Makefile
new file mode 100644
index 0000000..3b25443
--- /dev/null
+++ b/usr.bin/lsvfs/Makefile
@@ -0,0 +1,4 @@
+#	$Id$
+PROG=	lsvfs
+
+.include <bsd.prog.mk>
diff --git a/usr.bin/lsvfs/lsvfs.1 b/usr.bin/lsvfs/lsvfs.1
new file mode 100644
index 0000000..03a1139
--- /dev/null
+++ b/usr.bin/lsvfs/lsvfs.1
@@ -0,0 +1,53 @@
+.\" $Id$
+.\" Garrett A. Wollman, September 1994
+.\" This file is in the public domain.
+.\"
+.Dd September 21, 1994
+.Dt LSVFS 1
+.Os
+.Sh NAME
+.Nm lsvfs
+.Nd list installed virtual file systems
+.Sh SYNOPSIS
+.Nm lsvfs
+.Op Ar vfsname Ar ...
+.Sh DESCRIPTION
+The
+.Nm lsvfs
+command lists information about the currently loaded virtual filesystem
+modules.  When
+.Ar vfsname
+arguments are given,
+.Nm lsvfs
+lists information about the specified VFS modules.  Otherwise,
+.Nm lsvfs
+lists all currently loaded modules.
+The information is as follows:
+.Pp
+.Bl -tag -compact -width Filesystem
+.It Filesystem
+the name of the filesystem, as would be used in the
+.Fl t
+option to
+.Xr mount 8
+.It Index
+the kernel filesystem switch slot number for this filesystem, as would be
+used in the
+.Ar type
+parameter to
+.Xr mount 2
+.It Refs
+the number of references to this VFS; i.e., the number of currently
+mounted filesystems of this type
+.It Flags
+flag bits (none are currently defined).
+.El
+.Sh SEE ALSO
+.Xr mount 2 ,
+.Xr mount 8
+.Sh HISTORY
+A
+.Nm
+comand appeared in
+.Tn FreeBSD
+2.0.
diff --git a/usr.bin/lsvfs/lsvfs.c b/usr.bin/lsvfs/lsvfs.c
new file mode 100644
index 0000000..30ce386
--- /dev/null
+++ b/usr.bin/lsvfs/lsvfs.c
@@ -0,0 +1,50 @@
+/*
+ * lsvfs - lsit loaded VFSes
+ * Garrett A. Wollman, September 1994
+ * This file is in the public domain.
+ */
+
+#include <sys/types.h>
+#include <sys/param.h>
+#include <sys/mount.h>
+#include <stdio.h>
+#include <err.h>
+
+#define FMT "%-32.32s %5d %5d %5d\n"
+#define HDRFMT "%-32.32s %5.5s %5.5s %5.5s\n"
+#define DASHES "-------------------------------- ---- ---- ----\n"
+
+int
+main(int argc, char **argv)
+{
+  int rv = 0;
+  struct vfsconf *vfc;
+  argc--, argv++;
+
+  setvfsent(1);
+
+  printf(HDRFMT, "Filesystem", "Index", "Refs", "Flags");
+  fputs(DASHES, stdout);
+
+  if(argc) {
+    for(; argc; argc--, argv++) {
+      vfc = getvfsbyname(*argv);
+      if(vfc) {
+        printf(FMT, vfc->vfc_name, vfc->vfc_index, vfc->vfc_refcount,
+               vfc->vfc_flags);
+      } else {
+	warnx("VFS %s unknown or not loaded", name);
+        rv++;
+      }
+    }
+  } else {
+    while(vfc = getvfsent()) {
+      printf(FMT, vfc->vfc_name, vfc->vfc_index, vfc->vfc_refcount,
+             vfc->vfc_flags);
+    }
+  }
+
+  endvfsent();
+  return rv;
+}
+