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/*
* lftp and utils
*
* Copyright (c) 1996-2010 by Alexander V. Lukyanov (lav@yars.free.net)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/* $Id: GetJob.cc,v 1.36 2010/05/24 13:00:22 lav Exp $ */
#include <config.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stddef.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include "GetJob.h"
#include "misc.h"
#include "ArgV.h"
#include "url.h"
ResDecl res_clobber ("xfer:clobber", "no", ResMgr::BoolValidate,ResMgr::NoClosure);
ResDecl res_make_backup ("xfer:make-backup", "yes",ResMgr::BoolValidate,ResMgr::NoClosure);
#define super CopyJobEnv
#define NO_MODE ((mode_t)-1)
int GetJob::Do()
{
int m=STALL;
if(cp && cp->Done() && !cp->Error())
{
// now we can delete old file, since there is new one
RemoveBackupFile();
if(file_mode!=NO_MODE && local)
chmod(local->full_name,file_mode);
}
if(super::Do()==MOVED)
m=MOVED;
return m;
}
FileCopyPeer *GetJob::SrcLocal(const char *src)
{
const char *f=(cwd && src[0]!='/') ? dir_file(cwd,src) : src;
return FileCopyPeerFDStream::NewGet(f);
}
FileCopyPeer *GetJob::DstLocal(const char *dst)
{
bool clobber=(cont || res_clobber.QueryBool(0));
int flags=O_WRONLY|O_CREAT|(truncate_target_first?O_TRUNC:0)|(clobber?0:O_EXCL);
dst=expand_home_relative(dst);
const char *f=(cwd && dst[0]!='/') ? dir_file(cwd,dst) : dst;
if(truncate_target_first && res_make_backup.QueryBool(0))
{
/* rename old file if exists and size>0 */
struct stat st;
if(stat(f,&st)!=-1)
{
if(st.st_size>0 && S_ISREG(st.st_mode))
{
if(!clobber)
{
eprintf(_("%s: %s: file already exists and xfer:clobber is unset\n"),op,dst);
errors++;
count++;
return 0;
}
backup_file.vset(f,"~",NULL);
if(rename(f,backup_file)!=0)
backup_file.set(0);
else
file_mode=st.st_mode;
}
}
}
local=new FileStream(f,flags); // local is for pget.
FileCopyPeerFDStream *p=new FileCopyPeerFDStream(local,FileCopyPeer::PUT);
return p;
}
bool GetJob::IsRemoteNonURL(const ParsedURL &url,FA::open_mode mode)
{
// store & put || !store & get
return (!url.proto && ((mode==FA::STORE)^!reverse));
}
bool GetJob::IsLocalNonURL(const ParsedURL &url,FA::open_mode mode)
{
// store & get || !store & put
return (!url.proto && ((mode==FA::STORE)^reverse));
}
bool GetJob::IsLocal(const ParsedURL &url)
{
return !url.proto || !strcasecmp(url.proto,"file");
}
// create copy peer from a cloned session
FileCopyPeer *GetJob::CreateCopyPeer(FileAccess *session,const char *path,FA::open_mode mode)
{
ParsedURL url(path,true);
if(IsRemoteNonURL(url,mode))
return new FileCopyPeerFA(session,path,mode);
Delete(session); // delete cloned session.
return CreateCopyPeer(url,path,mode);
}
// create copy peer using a session reference
FileCopyPeer *GetJob::CreateCopyPeer(const FileAccessRef& session,const char *path,FA::open_mode mode)
{
ParsedURL url(path,true);
if(IsRemoteNonURL(url,mode))
return new FileCopyPeerFA(session,path,mode);
return CreateCopyPeer(url,path,mode);
}
FileCopyPeer *GetJob::CreateCopyPeer(const ParsedURL &url,const char *path,FA::open_mode mode)
{
if(IsLocalNonURL(url,mode))
return CreateCopyPeer(path,mode);
if(IsLocal(url))
return CreateCopyPeer(url.path,mode);
return new FileCopyPeerFA(&url,mode);
}
FileCopyPeer *GetJob::CreateCopyPeer(const char *path,FA::open_mode mode)
{
return mode==FA::STORE ? DstLocal(path) : SrcLocal(path);
}
void GetJob::NextFile()
{
try_next:
file_mode=NO_MODE;
backup_file.set(0);
local=0;
if(!args)
return;
const char *src=args->getnext();
const char *dst=args->getnext();
if(!src || !dst)
{
SetCopier(0,0);
return;
}
FileCopyPeer *dst_peer=CreateCopyPeer(session,dst,FA::STORE);
if(!dst_peer)
goto try_next;
FileCopyPeer *src_peer=CreateCopyPeer(session,src,FA::RETRIEVE);
FileCopy *c=FileCopy::New(src_peer,dst_peer,cont);
if(delete_files)
c->RemoveSourceLater();
if(remove_target_first)
c->RemoveTargetFirst();
SetCopier(c,src);
}
void GetJob::RemoveBackupFile()
{
if(backup_file)
{
remove(backup_file);
backup_file.set(0);
}
}
GetJob::GetJob(FileAccess *s,ArgV *a,bool c)
: CopyJobEnv(s,a,c)
{
delete_files=false;
remove_target_first=false;
truncate_target_first=!cont;
file_mode=NO_MODE;
reverse=false;
}
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