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gebi · Feb 22, 2003 · c9d768e · c9d768e
1 parent 4943d1d
commit c9d768e
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Showing 6 changed files with 57 additions and 28 deletions.
diff --git a/README b/README
@@ -4,11 +4,12 @@ How to use the Jungerl
 Simple! You just do 'make' to build all the erlang programs.
 
 If you want, you can add the bin/ directory to your $PATH, and use the
-useful program(s) in there!
+useful programs in there. One is 'jerl', a simple wrapper around 'erl'
+that adds all the Jungerl applications to the code path.
 
-If a program is giving you trouble, just put a file called SKIP in its
+If a program is giving you trouble, just put an empty file called SKIP
-top-level directory. For example, if you want to skip the 'tuntap'
+in its top-level directory. For example, if you want to skip the
-program, do:  touch lib/tuntap/SKIP
+'tuntap' program, you can do: touch lib/tuntap/SKIP
 
 
 How to add an application to the Jungerl
@@ -17,16 +18,12 @@ How to add an application to the Jungerl
 Each application has its own directory called lib/<appname>.
 
 The absolute minimum requirement for an application is to have a
-Makefile in the lib/<appname> directory with three targets:
+Makefile in the lib/<appname> directory with two targets:
 
   'all' should build the program.
 
   'clean' should delete any object files.
 
-  'conf' should do any necessary configuration. Most likely this is
-  nothing, but it can be used for e.g. application-specific autoconf
-  scripts.
-
 Realistically, your lib/<appname>/ dir should also have any of these
 subdirectories that are appropriate:
 
@@ -40,13 +37,13 @@ subdirectories that are appropriate:
 
   doc/   (not sure what this is for..)
 
-Once you have created your application, you should edit the top level
+Once you have created your application, you should edit the 'lib/'
-Makefile like this:
+directory Makefile like this:
 
   Add your <appname> to the "LIBS" variable.
 
-  If you depend on other applications, add a line that says so. For
+  If you depend on other applications, add a line that says so. (These
-  example <none yet..>.
+  are down near the bottom.)
 
 
 Makefile Helpers
@@ -56,9 +53,8 @@ The support/ directory contains a couple of useful include files for
 your Makefiles:
 
   subdirs.mk: Intended for your lib/<appname>/ directory, this defines
-  targets for 'all', 'clean', and 'config' that just cd into
+    targets for 'all' and 'clean' that just cd into $(SUBDIRS) (by
-  $(SUBDIRS) (by default c_src and src) and does the same "make" in
+    default c_src and src) and does the same "make" in each of them.
-  each of them.
 
   include.mk: This defines a bunch of useful things for building C and
     Erlang programs. For C it has 'configure'-detected CC and CFLAGS
@@ -73,5 +69,5 @@ your Makefiles:
     building ../ebin/*.beam from *.erl.
 
 That probably wasn't very clear, but if you look at how the 'tuntap'
-program's Makefiles are done then it should be obvious.
+program's Makefiles are done then it should be obvious!
 
diff --git a/lib/enfs/bin/run_procfs.sh b/lib/enfs/bin/run_procfs.sh
@@ -1,5 +1,5 @@
 #!/bin/sh
 basedir=$(dirname $0)
-erl -pz ${basedir}/../ebin -pz ${basedir}/../rpc-ebin \
+erl -pz ${basedir}/../ebin -pz ${basedir}/../../rpc/ebin \
     -s nfs_procfs start_link
 
diff --git a/lib/enfs/src/nfs_procfs.erl b/lib/enfs/src/nfs_procfs.erl
@@ -8,13 +8,15 @@
 -module(nfs_procfs).
 -author('luke@bluetail.com').
 
--export([start_link/0, root/0, getattr/1, lookup/2, dirlist/1, read/1]).
+-export([start_link/0, root/0, getattr/1, lookup/2, dirlist/1, read/1,
+	 statfs/1]).
 
 start_link() ->
     {ok, Pid} = nfs_server:start_link(),
     nfs_server:add_mountpoint("/procfs", ?MODULE),
     {ok, Pid}.
 
+%% Returns: ID of root directory, any erlang term.
 root() ->
     root.
 
@@ -95,3 +97,18 @@ now_timestamp() ->
     {Mega, Sec, Micro} = now(),
     {((Mega * 1000000) + Sec) band 16#ffffffff, Micro}.
 
+%% Callback: statfs(ID) -> {ok, {Tsize, Bsize, Blocks, Bfree, Bavail}} |
+%%                         {error, Reason}
+%% Return values:
+%%       Tsize   The optimum transfer size of the server in bytes.  This is
+%%               the number of bytes the server would like to have in the
+%%               data part of READ and WRITE requests.
+%%       Bsize   The block size in bytes of the filesystem.
+%%       Blocks  The total number of "bsize" blocks on the filesystem.
+%%       Bfree   The number of free "bsize" blocks on the filesystem.
+%%       Bavail  The number of "bsize" blocks available to non-privileged
+%%               users.
+
+statfs(_) ->
+    {ok, {65535, 1024, 1024, 0, 0}}.	% pulled out of the air
+
diff --git a/lib/enfs/src/nfs_server.erl b/lib/enfs/src/nfs_server.erl
@@ -244,9 +244,31 @@ handle_call({nfsproc_read_2, {FH, Offset, Count, _}, C}, From, State) ->
 	end,
     {reply, R, State};
 
+%% ----------------------------------------------------------------------
+%% NFSPROC_READ
+%% ----------------------------------------------------------------------
+
+handle_call({nfsproc_statfs_2, FH, C}, From, State) ->
+    R = case fh2id(FH) of
+	    {ok, ID} ->
+		Mod = fh2mod(FH),
+		case catch apply(Mod, statfs, [ID]) of
+		    {ok, Res = {Tsize, Bsize, Blocks, Bfree, Bavail}} ->
+			{'NFS_OK', Res};
+		    {error, Reason} ->
+			{error(Reason), void};
+		    Other ->
+			io:format("Bad return from ~p:statfs/1: ~p~n",
+				  [Mod, Other])
+		end;
+	    error ->
+		{'NFSERR_STALE', void}
+	end,
+    {reply, R, State};
+
 handle_call(Request, From, State) ->
     io:format("Undefined callback: ~p~n", [Request]),
-    Reply = ok,
+    Reply = {error, nocallback},
     {reply, Reply, State}.
 
 handle_cast(Msg, State) ->
@@ -365,6 +387,7 @@ new_fsid(Mod) ->
     [{next_fsid, N}] = ets:lookup(?misc_tab, next_fsid),
     ets:update_counter(?misc_tab, next_fsid, 1),
     ets:insert(?fsid_mod_tab, {N, Mod}),
+    ets:insert(?mod_fsid_tab, {Mod, N}),
     N.
 
 fsid2mod(FSID) ->

diff --git a/lib/ermacs/README b/lib/ermacs/README
@@ -1,4 +1,3 @@
-
 Ermacs: an erlang clone of emacs.
 =================================
 

diff --git a/lib/slang/README b/lib/slang/README
@@ -1,4 +1,3 @@
-
 This is slang, an erlang interface to the amazing highly portable tty 
 interface that gave us such nice tty applications as mutt and slrn
 
@@ -23,10 +22,5 @@ $ (cd config; ./configure)
 $ make
 
 
+(By klacke@bluetail.com)
 
-
-
-
-
-
-