1、使用ssh客户端，登陆ubuntu
ssh-p2206root@127.0.0.1
2、下载fuse源码，进行编译，安装(当前工作目录为~)
wgethttps://github.com/libfuse/libfuse/releases/download/fuse-3.0.0rc3/fuse-3.0.0rc3.tar.gz tarxvffuse-3.0.0rc3.tar.gz cdfuse-3.0.0rc3/ ./configure make-j8 makeinstall depmod modprobefuse
3、测试example\hello_ll是否能正常工作
cdexample/ ./hello_ll--help ./hello_ll/mnt mount cd/mnt ls cathello cd umount/mnt
针对example\hello_ll.c，进行改动测试：
1、在根目录下多创建一个文件出来，节点号定为5，名称为frombyte，内容为文本"http://www.datahf.net"
改动如下：
/*
FUSE:FilesysteminUserspace
Copyright(C)2001-2007MiklosSzeredi<miklos@szeredi.hu>
ThisprogramcanbedistributedunderthetermsoftheGNUGPL.
SeethefileCOPYING.
*/
/**@file
*
*minimalexamplefilesystemusinglow-levelAPI
*
*Compilewith:
*
*gcc-Wallhello_ll.c`pkg-configfuse3--cflags--libs`-ohello_ll
*
*##Sourcecode##
*\includehello_ll.c
*/
#defineFUSE_USE_VERSION30
#include<config.h>
#include<fuse_lowlevel.h>
#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#include<errno.h>
#include<fcntl.h>
#include<unistd.h>
#include<assert.h>
staticconstchar*hello_str="HelloWorld!\n";
staticconstchar*hello_name="hello";
//change1#0
staticconstchar*inode5_str="http://www.datahf.net!\n";
staticconstchar*inode5_name="frombyte";
//changeend
staticinthello_stat(fuse_ino_tino,structstat*stbuf)
{
stbuf->st_ino=ino;
switch(ino){
case1:
stbuf->st_mode=S_IFDIR|0755;
stbuf->st_nlink=2;
break;
case2:
stbuf->st_mode=S_IFREG|0444;
stbuf->st_nlink=1;
stbuf->st_size=strlen(hello_str);
break;
//change1#1
case5:
stbuf->st_mode=S_IFREG|0444;
stbuf->st_nlink=1;
stbuf->st_size=strlen(inode5_str);
break;
//change1end
default:
return-1;
}
return0;
}
staticvoidhello_ll_getattr(fuse_req_treq,fuse_ino_tino,structfuse_file_info*fi)
{
structstatstbuf;
(void)fi;
memset(&stbuf,sizeof(stbuf));
if(hello_stat(ino,&stbuf)==-1)
fuse_reply_err(req,ENOENT);
else
fuse_reply_attr(req,&stbuf,1.0);
}
staticvoidhello_ll_lookup(fuse_req_treq,fuse_ino_tparent,constchar*name)
{
structfuse_entry_parame;
//change1#2
/*
if(parent!=1||strcmp(name,hello_name)!=0)
fuse_reply_err(req,ENOENT);
else{
memset(&e,sizeof(e));
e.ino=2;
e.attr_timeout=1.0;
e.entry_timeout=1.0;
hello_stat(e.ino,&e.attr);
fuse_reply_entry(req,&e);
}*/
if(parent!=1)
fuse_reply_err(req,ENOENT);
elseif(strcmp(name,hello_name)==0){
memset(&e,sizeof(e));
e.ino=2;
e.attr_timeout=1.0;
e.entry_timeout=1.0;
hello_stat(e.ino,&e.attr);
fuse_reply_entry(req,&e);
}
elseif(strcmp(name,inode5_name)==0){
memset(&e,sizeof(e));
e.ino=5;
e.attr_timeout=1.0;
e.entry_timeout=1.0;
hello_stat(e.ino,&e.attr);
fuse_reply_entry(req,&e);
}
else
fuse_reply_err(req,ENOENT);
//change1end
}
structdirbuf{
char*p;
size_tsize;
};
staticvoiddirbuf_add(fuse_req_treq,structdirbuf*b,constchar*name,fuse_ino_tino)
{
structstatstbuf;
size_toldsize=b->size;
b->size+=fuse_add_direntry(req,NULL,name,0);
b->p=(char*)realloc(b->p,b->size);
memset(&stbuf,sizeof(stbuf));
stbuf.st_ino=ino;
fuse_add_direntry(req,b->p+oldsize,b->size-oldsize,b->size);
}
#definemin(x,y)((x)<(y)?(x):(y))
staticintreply_buf_limited(fuse_req_treq,constchar*buf,size_tbufsize,off_toff,size_tmaxsize)
{
if(off<bufsize)
returnfuse_reply_buf(req,buf+off,min(bufsize-off,maxsize));
else
returnfuse_reply_buf(req,0);
}
staticvoidhello_ll_readdir(fuse_req_treq,size_tsize,structfuse_file_info*fi)
{
(void)fi;
if(ino!=1)
fuse_reply_err(req,ENOTDIR);
else{
structdirbufb;
memset(&b,sizeof(b));
dirbuf_add(req,&b,".",1);
dirbuf_add(req,"..",hello_name,2);
//change1
dirbuf_add(req,inode5_name,5);
//end
reply_buf_limited(req,b.p,b.size,off,size);
free(b.p);
}
}
staticvoidhello_ll_open(fuse_req_treq,structfuse_file_info*fi)
{
//change1
//if(ino!=2)
if((ino!=2)&&(ino!=5))
//end
fuse_reply_err(req,EISDIR);
elseif((fi->flags&3)!=O_RDONLY)
fuse_reply_err(req,EACCES);
else
fuse_reply_open(req,fi);
}
staticvoidhello_ll_read(fuse_req_treq,structfuse_file_info*fi)
{
(void)fi;
//change1
//assert(ino==2);
//reply_buf_limited(req,hello_str,strlen(hello_str),size);
switch(ino){
case2:
reply_buf_limited(req,size);
break;
case5:
reply_buf_limited(req,inode5_str,strlen(inode5_str),size);
break;
default:
;
}
//end
}
staticstructfuse_lowlevel_opshello_ll_oper={
.lookup =hello_ll_lookup,.getattr =hello_ll_getattr,.readdir =hello_ll_readdir,.open =hello_ll_open,.read =hello_ll_read,};
intmain(intargc,char*argv[])
{
structfuse_argsargs=FUSE_ARGS_INIT(argc,argv);
structfuse_session*se;
structfuse_cmdline_optsopts;
intret=-1;
if(fuse_parse_cmdline(&args,&opts)!=0)
return1;
if(opts.show_help){
printf("usage:%s[options]<mountpoint>\n\n",argv[0]);
fuse_cmdline_help();
fuse_lowlevel_help();
ret=0;
gotoerr_out1;
}elseif(opts.show_version){
printf("FUSElibraryversion%s\n",fuse_pkgversion());
fuse_lowlevel_version();
ret=0;
gotoerr_out1;
}
se=fuse_session_new(&args,&hello_ll_oper,sizeof(hello_ll_oper),NULL);
if(se==NULL)
gotoerr_out1;
if(fuse_set_signal_handlers(se)!=0)
gotoerr_out2;
if(fuse_session_mount(se,opts.mountpoint)!=0)
gotoerr_out3;
fuse_daemonize(opts.foreground);
/*Blockuntilctrl+corfusermount-u*/
if(opts.singlethread)
ret=fuse_session_loop(se);
else
ret=fuse_session_loop_mt(se,opts.clone_fd);
fuse_session_unmount(se);
err_out3:
fuse_remove_signal_handlers(se);
err_out2:
fuse_session_destroy(se);
err_out1:
free(opts.mountpoint);
fuse_opt_free_args(&args);
returnret?1:0;
}
结果测试：
cd~/fuse-3.0.0rc3/example/ make ./hello_ll/mnt ll-i/mnt cat/mnt/frombyte umount/mnt
2、待续
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