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/*
* Copyright (C) 2007-2023 Xagasoft, All rights reserved.
*
* This file is part of the libbu++ library and is released under the
* terms of the license contained in the file LICENSE.
*/
#define _FILE_OFFSET_BITS 64
#define FUSE_USE_VERSION 26
#include <fuse.h>
#include <string.h>
#include <errno.h>
#include <bu/file.h>
#include <bu/myriadfs.h>
#include <bu/myriadstream.h>
#include <bu/hash.h>
Bu::File *pF = NULL;
Bu::MyriadFs *pFs = NULL;
typedef Bu::Hash<int64_t, Bu::MyriadStream> FileHash;
FileHash hOpenFiles;
int64_t iNextFileId = 0;
#define TRACE
extern "C" {
static int myriadfs_getattr( const char *sPath, struct stat *stbuf )
{
#ifdef TRACE
printf("myriadfs_getattr(\"%s\", ... );\n", sPath );
#endif
try
{
Bu::MyriadFs::Stat st;
pFs->stat( sPath, st );
stbuf->st_ino = st.iNode;
stbuf->st_mode = st.uPerms;
stbuf->st_nlink = st.iLinks;
stbuf->st_uid = st.iUser;
stbuf->st_gid = st.iGroup;
stbuf->st_rdev = Bu::MyriadFs::devToSys( st.uDev );
stbuf->st_size = st.iSize;
stbuf->st_blocks = 8;
stbuf->st_atime = st.iATime;
stbuf->st_mtime = st.iMTime;
stbuf->st_ctime = st.iCTime;
return 0;
}
catch(...)
{
return -ENOENT;
}
}
static int myriadfs_readdir( const char *sPath, void *buf,
fuse_fill_dir_t filler, off_t offset, struct fuse_file_info *fi )
{
#ifdef TRACE
printf("myriadfs_readdir(\"%s\", ... );\n", sPath );
#endif
Bu::MyriadFs::Dir lDir = pFs->readDir( sPath );
filler( buf, ".", NULL, 0 );
filler( buf, "..", NULL, 0 );
for( Bu::MyriadFs::Dir::iterator i = lDir.begin(); i; i++ )
{
filler( buf, (*i).sName.getStr(), NULL, 0 );
}
return 0;
}
static int myriadfs_mkdir( const char *sPath, mode_t uMode )
{
#ifdef TRACE
printf("myriadfs_mkdir(\"%s\", 0%o );\n", sPath, uMode );
#endif
pFs->mkDir( sPath, uMode );
return 0;
}
static int myriadfs_open( const char *sPath, struct fuse_file_info *fi )
{
#ifdef TRACE
printf("myriadfs_open(\"%s\", ... );\n", sPath );
#endif
try
{
Bu::MyriadStream ms = pFs->open( sPath, 0 );
fi->fh = iNextFileId;
hOpenFiles.insert( iNextFileId++, ms );
// printf("File '%s' opened, %d files open now.\n",
// sPath, hOpenFiles.getSize() );
return 0;
}
catch(...)
{
return -EACCES;
}
}
static int myriadfs_read( const char *sPath, char *buf, size_t iSize,
off_t iOffset, struct fuse_file_info *fi )
{
#ifdef TRACE
printf("myriadfs_read(\"%s\", ..., %d, %d, ... );\n", sPath, iSize,
iOffset );
#endif
Bu::MyriadStream &ms = hOpenFiles.get( fi->fh );
ms.setPos( iOffset );
return ms.read( buf, iSize );
}
static int myriadfs_write( const char *sPath, const char *buf, size_t iSize,
off_t iOffset, struct fuse_file_info *fi )
{
#ifdef TRACE
printf("myriadfs_write(\"%s\", ..., %d, %d, ... );\n", sPath, iSize,
iOffset );
#endif
Bu::MyriadStream &ms = hOpenFiles.get( fi->fh );
ms.setPos( iOffset );
return ms.write( buf, iSize );
}
static int myriadfs_create( const char *sPath, mode_t uPerms,
struct fuse_file_info *fi )
{
#ifdef TRACE
printf("myriadfs_create(\"%s\", 0%o, ... );\n", sPath, uPerms );
#endif
try
{
Bu::MyriadStream ms = pFs->open( sPath, 0, uPerms );
fi->fh = iNextFileId;
hOpenFiles.insert( iNextFileId++, ms );
// printf("File '%s' created, %d files open now.\n",
// sPath, hOpenFiles.getSize() );
return 0;
}
catch(...)
{
return -EACCES;
}
}
static int myriadfs_mknod( const char *sPath, mode_t uPerms, dev_t Dev )
{
#ifdef TRACE
printf("myriadfs_mknod(\"%s\", 0%o, %x );\n", sPath, uPerms, Dev );
#endif
try
{
pFs->create( sPath, uPerms, Bu::MyriadFs::sysToDev( Dev ) );
return 0;
}
catch(...)
{
return -EACCES;
}
}
static int myriadfs_release( const char *sPath, struct fuse_file_info *fi )
{
#ifdef TRACE
printf("myriadfs_release(\"%s\", ... );\n", sPath );
#endif
hOpenFiles.erase( fi->fh );
// printf("File '%s' released, %d files open now.\n",
// sPath, hOpenFiles.getSize() );
return 0;
}
static int myriadfs_utimens( const char *sPath,
const struct timespec tv[2] )
{
#ifdef TRACE
printf("myriadfs_utimens(\"%s\", ... );\n", sPath );
#endif
try
{
pFs->setTimes( sPath, tv[0].tv_sec, tv[1].tv_sec );
}
catch(...)
{
return -EACCES;
}
return 0;
}
static int myriadfs_unlink( const char *sPath )
{
#ifdef TRACE
printf("myriadfs_unlink(\"%s\");\n", sPath );
#endif
try
{
pFs->unlink( sPath );
}
catch( Bu::MyriadFsException &e )
{
printf("MyriadFsException: %s\n", e.what() );
return -EACCES;
}
return 0;
}
static int myriadfs_symlink( const char *sTarget, const char *sPath )
{
#ifdef TRACE
printf("myriadfs_symlink(\"%s\", \"%s\");\n", sTarget, sPath );
#endif
try
{
pFs->mkSymLink( sTarget, sPath );
}
catch( Bu::MyriadFsException &e )
{
printf("MyriadFsException: %s\n", e.what() );
return -EACCES;
}
return 0;
}
static int myriadfs_readlink( const char *sPath, char *sOut, size_t s )
{
#ifdef TRACE
printf("myriadfs_readlink(\"%s\", ... );\n", sPath );
#endif
try
{
Bu::String sTrg = pFs->readSymLink( sPath );
size_t iLen = (s-1>sTrg.getSize())?(sTrg.getSize()):(s-1);
memcpy( sOut, sTrg.getStr(), iLen );
sOut[iLen] = '\0';
}
catch( Bu::MyriadFsException &e )
{
printf("MyriadFsException: %s\n", e.what() );
return -EACCES;
}
return 0;
}
static int myriadfs_truncate( const char *sPath, off_t iSize )
{
#ifdef TRACE
printf("myriadfs_truncate(\"%s\", %d );\n", sPath, iSize );
#endif
try
{
pFs->setFileSize( sPath, iSize );
}
catch( Bu::MyriadFsException &e )
{
printf("MyriadFsException: %s\n", e.what() );
return -ENOENT;
}
return 0;
}
static int myriadfs_link( const char *sTarget, const char *sPath )
{
#ifdef TRACE
printf("myriadfs_link(\"%s\", \"%s\");\n", sTarget, sPath );
#endif
try
{
pFs->mkHardLink( sTarget, sPath );
}
catch( Bu::MyriadFsException &e )
{
printf("MyriadFsException: %s\n", e.what() );
return -EACCES;
}
return 0;
}
static int myriadfs_rename( const char *sFrom, const char *sTo )
{
#ifdef TRACE
printf("myriadfs_rename(\"%s\", \"%s\");\n", sFrom, sTo );
#endif
try
{
pFs->rename( sFrom, sTo );
}
catch( Bu::MyriadFsException &e )
{
printf("MyriadFsException: %s\n", e.what() );
return -EACCES;
}
return 0;
}
static struct fuse_operations myriadfs_oper;
int main( int argc, char *argv[] )
{
pF = new Bu::File("store.myr", Bu::File::Read|Bu::File::Write|Bu::File::Create );
pFs = new Bu::MyriadFs( *pF, 512 );
memset( &myriadfs_oper, sizeof(myriadfs_oper), 0 );
myriadfs_oper.getattr = myriadfs_getattr;
myriadfs_oper.readdir = myriadfs_readdir;
myriadfs_oper.mkdir = myriadfs_mkdir;
myriadfs_oper.open = myriadfs_open;
myriadfs_oper.read = myriadfs_read;
myriadfs_oper.write = myriadfs_write;
myriadfs_oper.create = myriadfs_create;
myriadfs_oper.mknod = myriadfs_mknod;
myriadfs_oper.release = myriadfs_release;
myriadfs_oper.utimens = myriadfs_utimens;
myriadfs_oper.unlink = myriadfs_unlink;
myriadfs_oper.rmdir = myriadfs_unlink;
myriadfs_oper.symlink = myriadfs_symlink;
myriadfs_oper.readlink = myriadfs_readlink;
myriadfs_oper.truncate = myriadfs_truncate;
myriadfs_oper.link = myriadfs_link;
myriadfs_oper.rename = myriadfs_rename;
printf("Starting fuse_main.\n");
int iRet = fuse_main( argc, argv, &myriadfs_oper, NULL );
printf("Done with fuse_main.\n");
delete pFs;
delete pF;
return iRet;
}
}
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