Operation Record: Configure fuse development environment and fuse Development specification test in ubuntu16.04.1

1, using SSH client, landing ubuntu

Ssh-p 2206 [email protected]

2, download the fuse source code, compile, install (current working directory is ~)

wget Https://github.com/libfuse/libfuse/releases/download/fuse-3.0.0rc3/fuse-3.0.0rc3.tar.gztar XVF FUSE-3.0.0RC3.TAR.GZCD fuse-3.0.0rc3/./configuremake-j8make Installdepmodmodprobe Fuse

3. Test whether the EXAMPLE\HELLO_LL can work properly

CD Example/./hello_ll--help./hello_ll/mntmountcd/mntlscat hellocdumount/mnt

• For EXAMPLE\HELLO_LL.C, make the change test:

1, in the root directory to create more than one file, the node number is set to 5, the name is Frombyte, the content is the text "Http://www.datahf.net"

The changes are as follows:

/*  fuse: filesystem in userspace  copyright  (C)  2001-2007   miklos szeredi <[email protected]>  this program can be  distributed under the terms of the gnu gpl.  see the  file COPYING.*//**  @file  * * minimal example filesystem using  low-level api * * compile with: * *     gcc  -Wall hello_ll.c  ' Pkg-config fuse3 --cflags --libs '  -o hello_ll  * * ## source code ## * \include hello_ll.c */#define  fuse_ use_version 30#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>static const char *hello_str =  " hello world!\n ";static const char *hello_name = " Hello ";//change1  #0static  const char *inode5_str =  "http://www.datahf.net!\n"; Static const char  *inode5_name =  "Frombyte";//change endstatic int hello_stat (Fuse_ino_t ino ,  struct stat *stbuf) {stbuf->st_ino = ino;switch  (INO)  {case 1: STBUF-&GT;ST_MODE&NBSP;=&NBSP;S_IFDIR&NBSP;|&NBSP;0755;STBUF-&GT;ST_NLINK&NBSP;=&NBSP;2;BREAK;CASE&NBSP;2: Stbuf->st_mode = s_ifreg | 0444;stbuf->st_nlink = 1;stbuf->st_size  = strlen (HELLO_STR);break;//change1   #1     case 5:         stbuf->st_mode = S_IFREG | 0444;         stbuf->st_nlink = 1;        stbuf->st_size =  Strlen (INODE5_STR);        break;//change1 end             default:return -1;} return 0;} Static void hello_ll_getattr (fuse_req_t req, fuse_ino_t ino,     &NBSP;STRUCT&NBSP;FUSE_FILE_INFO&NBSP;*FI) {struct stat stbuf; (void)  fi;memset (&stbuf,  0, sizeof (STBUF));if  (Hello_stat (ino, &stbuf)  == -1) Fuse_reply_err (req,  ENOENT); elsefuse_reply_attr (req, &stbuf, 1.0);} Static void hello_ll_lookup (Fuse_req_t req, fuse_ino_t parent, const char  *name) {struct fuse_entry_param e;    //change1   #2      /*    if  (parent != 1 | |  strcmp(name, hello_name)  != 0)         fuse_reply_err (req,  enoent);     else {        memset (&e ,  0, sizeof (e));        e.ino = 2;         e.attr_timeout = 1.0;         e.entry_timeout = 1.0;        hello_stat (e.ino,  &AMP;E.ATTR);                 Fuse_reply_entry (req, &e);    }*/    if  (parent !=  1) Fuse_reply_err (req, enoent) else if (strcmp (name, hello_name)  == 0) {memset ( &e, 0, sizeof (e)); e.ino = 2;e.attr_timeout = 1.0;e.entry_timeout =  1.0;hello_stat (E.INO,&NBSP;&AMP;E.ATTR); Fuse_reply_entry (req, &e);}     else if (strcmp (name, inode5_name)  == 0) {         memset (&e, 0, 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);     //change1 end}struct  dirbuf {char *p;size_t size;}; Static void dirbuf_add (Fuse_req_t req, struct dirbuf *b, const char  *name,       fuse_ino_t ino) {struct stat stbuf;size_t oldsize = b->size;b-> Size += fuse_add_direntry (req, null, 0, name, null, 0);b->p =  (char *)  realloc (b->p, b->size); memset (&stbuf, 0, sizeof (STBUF)); stbuf.st_ Ino = ino;fuse_add_direntry (req, b->p + oldsize, b->size -  oldsize, name, &stbuf,  b->size);} #define &NBSP;MIN (X, y)   ((x)  <  (y)  ?  (x)  :  (y)) static int  Reply_buf_limited (fuse_req_t req, const char *buf, size_t bufsize,      off_t off, size_t maxsize) {if  (off < bufsize) return  Fuse_reply_buf (Req, buf + off,      min (Bufsize - off,  maxsize)); Elsereturn fuse_reply_buf (req, null, 0);} Static void hello_ll_readdir (Fuse_req_t req, fuse_ino_t ino, size_t size, &NBSP;&NBSP;&NBSP;&NBSP;&NBSP;OFF_T&NBSP;OFF,&NBSP;STRUCT&NBSP;FUSE_FILE_INFO&NBSP;*FI) {(void)  fi;if   (ino != 1) Fuse_reply_err (Req, enotdir); Else {struct dirbuf b;memset (&b ,  0, sizeof (b));d Irbuf_add (req, &b,  ".",  1);d irbuf_add (req, &b,  "..." ,  1);d Irbuf_add (req, &b, hello_name, 2);         //change1        dirbuf_add (Req, &b, inode5_name, &NBSP;5);         //endreply_buf_limited (Req, b.p, b.size,  off, size); free (B.P);}} Static void hello_ll_open (Fuse_req_t req, fuse_ino_t ino,  struct fuse _FILE_INFO&NBSP;*FI) {    //change1//if  (ino != 2) &NBSP;&NBSP;&Nbsp; if  (  (ino !=2)  &&  (ino != 5)  )      //endfuse_reply_err (Req, eisdir);else if  ((fi->flags & 3)  != O _rdonly) Fuse_reply_err (req, eacces); Elsefuse_reply_open (REQ,&NBSP;FI);} Static void hello_ll_read (Fuse_req_t req, fuse_ino_t ino, size_t size, &NBSP;&NBSP;OFF_T&NBSP;OFF,&NBSP;STRUCT&NBSP;FUSE_FILE_INFO&NBSP;*FI) {(void)  fi;    / /change1//assert (INO&NBSP;==&NBSP;2);//reply_buf_limited (Req, hello_str, strlen (HELLO_STR),  off ,  size);    switch  (INO)  {         Case 2:            reply_buf_limited (req,  hello_str, strlen (HELLO_STR),  off, size);             break;    &nbsP;   case 5:            reply_ Buf_limited (Req, inode5_str, strlen (INODE5_STR),  off, size);             break;        default:             ;    }     //end}static struct fuse_lowlevel_ops hello_ll_oper = {.lookup= hello_ll_ lookup,.getattr= hello_ll_getattr,.readdir= hello_ll_readdir,.open= hello_ll_open,.read=  Hello_ll_read,};int main (int argc, char *argv[]) {struct fuse_args args =  fuse_args_init (ARGC,&NBSP;ARGV);struct fuse_session *se;struct fuse_cmdline_opts  opts;int ret = -1;if  (Fuse_parse_cmdline (&args, &opts)  != 0) return  1;if  (opTS.SHOW_HELP)  {printf ("usage: %s [options] <mountpoint>\n\n",  argv[0]); fuse_ Cmdline_help (); Fuse_lowlevel_help (); ret = 0;goto err_out1;}  else if  (opts.show_version)  {printf ("fuse library version %s\n",  fuse _pkgversion ()); Fuse_lowlevel_version (); ret = 0;goto err_out1;} Se = fuse_session_new (&args, &hello_ll_oper,      sizeof ( Hello_ll_oper),  null);if  (se == null)     goto err_out1;if  ( Fuse_set_signal_handlers (SE)  != 0)     goto err_out2;if  (fuse_session_ Mount (se, opts.mountpoint)  != 0)     goto err_out3;fuse_daemonize ( Opts.foreground);/* block until ctrl+c or fusermount -u */if  ( Opts.singlethread) ret = fuse_session_loop (SE); ELSERET&NBSP;=&NBSP;FUSE_SESSION_LOOP_MT (SE,&NBSP;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); return ret ? 1  : 0;}

Results test:

CD ~/fuse-3.0.0rc3/example/make./hello_ll/mntll-i/mntcat/mnt/frombyte umount/mnt

2. To be Continued

This article is from the "Zhang Yu (Data Recovery)" blog, please be sure to keep this source http://zhangyu.blog.51cto.com/197148/1881032

Operation Record: Configure fuse development environment and fuse Development specification test in ubuntu16.04.1