开源项目egfs

在http://projects.trapexit.org/web/#/web/index/all/name/asc/225发现了一个开源项目egfshttp://code.google.com/p/egfs/,与俺的efs目的类似，同时发现了fuserl和fuserldrv，完成了fuse的erlang port驱动（support port＋linkedin port)，可以试试。

安装完毕后，在.erlang下面加入fuserl的代码路径：

引用

code:add_patha("...").

    include_lib is similar to include, but should not point out an absolute file. Instead, the > first path component (possibly after variable substitution) is assumed to be the name of an > application. Example:

    -include_lib("kernel/include/file.hrl").

    The code server uses code:lib_dir(kernel) to find the directory of the current (latest) > version of Kernel, and then the subdirectory include is searched for the file file.hrl.

erl +A 64
> application:start(fuserl).
> application:start(fuserlproc).
> file:list_dir("/erlproc").

gj@uss:~$ ll /proc/21270/fd
total 0
lrwx------ 1 gj gj 64 2010-02-20 11:24 0 -> /dev/pts/4
lrwx------ 1 gj gj 64 2010-02-20 11:24 1 -> /dev/pts/4
lrwx------ 1 gj gj 64 2010-02-20 11:24 2 -> /dev/pts/4
lr-x------ 1 gj gj 64 2010-02-20 11:24 3 -> pipe:[294864]
l-wx------ 1 gj gj 64 2010-02-20 11:24 4 -> pipe:[294863]
lrwx------ 1 gj gj 64 2010-02-20 11:24 5 -> /dev/fuse

  open_port ({ spawn, Dir ++ "/bin/fuserldrv" }, [ binary, 
                                                   { packet, 4 },
                                                   nouse_stdio,
                                                   exit_status ]);

# pstree -ap

  ├─gnome-terminal,12461
  │   ├─bash,12465
  │   │   └─vim,24326 mds/mds/main.c
  │   │       ├─cscope,24360 -dl -f ../../cscope.out
  │   │       └─{vim},24327
  │   ├─bash,13467
  │   │   └─su,14662
  │   │       └─bash,14663
  │   │           └─vim,19922 ./lib/mount.c
  │   │               └─{vim},19923
  │   ├─bash,15897
  │   ├─bash,19578
  │   ├─bash,19680
  │   ├─bash,21147
  │   │   └─beam.smp,25268 -A 2 -- -root /usr/local/lib/erlang -progname erl -- -home /home/gj --
  │   │       ├─fuserldrv,25290
  │   │       ├─{beam.smp},25272
  │   │       ├─{beam.smp},25273
  │   │       ├─{beam.smp},25274
  │   │       ├─{beam.smp},25275
  │   │       ├─{beam.smp},25276
  │   │       ├─{beam.smp},25277
  │   │       ├─{beam.smp},25278
  │   │       └─{beam.smp},25279

libfuse与fuse kernel module用打开/dev/fuse返回的fd进行通信。
在open_port时指定选项nouse_stdio,现在外部程序用fd 3 && 4与模拟器进行通信。
外部程序fuserldrv是beam.smp的子进程。