mirror of
https://github.com/RetroShare/RetroShare.git
synced 2024-12-15 02:44:20 -05:00
Added new 2-pass save method to configuration management
- essentially if any part of the file saving procedure fails, there should be config files whose signatures/hash match up git-svn-id: http://svn.code.sf.net/p/retroshare/code/trunk@2476 b45a01b8-16f6-495d-af2f-9b41ad6348cc
This commit is contained in:
chrisparker126
parent
759ae94033
commit
6ab15c8f83
@ -23,6 +23,11 @@
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*
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*/
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#include "fstream"
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using std::ofstream;
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using std::ifstream;
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#include "util/rsdir.h"
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#include "rsiface/rspeers.h"
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#include "pqi/p3cfgmgr.h"
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@ -34,9 +39,8 @@
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#include "serialiser/rsconfigitems.h"
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/****
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* #define CONFIG_DEBUG 1
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***/
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#define CONFIG_DEBUG 1
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p3ConfigMgr::p3ConfigMgr(std::string dir, std::string fname, std::string signame)
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:basedir(dir), metafname(fname), metasigfname(signame),
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@ -137,6 +141,8 @@ void p3ConfigMgr::saveConfiguration()
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/* construct filename */
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std::string filename1 = basedir;
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std::string filename2 = basedir;
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std::string filename1_tmp, filename2_tmp; // temporary file to do two pass save
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if (basedir != "")
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{
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filename1 += "/";
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@ -144,6 +150,8 @@ void p3ConfigMgr::saveConfiguration()
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}
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filename1 += metasigfname;
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filename2 += metafname;
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filename1_tmp = filename1 + ".tmp";
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filename2_tmp = filename2 + ".tmp";
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/* Write the data to a stream */
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uint32_t bioflags = BIN_FLAGS_WRITEABLE;
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@ -165,10 +173,10 @@ void p3ConfigMgr::saveConfiguration()
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std::cerr << std::endl;
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#endif
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if (!membio->writetofile(filename2.c_str()))
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if (!membio->writetofile(filename2_tmp.c_str()))
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{
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#ifdef CONFIG_DEBUG
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std::cerr << "p3ConfigMgr::saveConfiguration() Failed to Write MetaFile " << filename2 ;
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std::cerr << "p3ConfigMgr::saveConfiguration() Failed to Write temp MetaFile " << filename2 ;
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std::cerr << std::endl;
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#endif
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}
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@ -178,14 +186,30 @@ void p3ConfigMgr::saveConfiguration()
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BinMemInterface *signbio = new BinMemInterface(signature.c_str(),
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signature.length(), BIN_FLAGS_READABLE);
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if (!signbio->writetofile(filename1.c_str()))
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if (!signbio->writetofile(filename1_tmp.c_str()))
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{
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#ifdef CONFIG_DEBUG
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std::cerr << "p3ConfigMgr::saveConfiguration() Failed to Write MetaSignFile" << filename1 ;
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std::cerr << "p3ConfigMgr::saveConfiguration() Failed to Write temp MetaSignFile" << filename1 ;
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std::cerr << std::endl;
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#endif
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}
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/*
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* if above written successfully now write actual file that will be read initially
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* The aim is that if any of the file savings here fail at least one of these pairings of
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* signature will be compatible to either config.tmp and config files
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*/
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if (!membio->writetofile(filename1.c_str()) || !signbio->writetofile(filename2.c_str()))
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{
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#ifdef CONFIG_DEBUG
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std::cerr << "p3ConfigMgr::saveConfiguration() Failed to Write MetaFile and MetaSignFile " << filename2 ;
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std::cerr << std::endl;
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#endif
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}
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delete signbio;
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@ -203,100 +227,51 @@ void p3ConfigMgr::loadConfiguration()
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/* construct filename */
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std::string filename1 = basedir;
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std::string filename2 = basedir;
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std::string filename1_tmp, filename2_tmp;
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if (basedir != "")
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{
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filename1 += "/";
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filename2 += "/";
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}
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filename1 += metasigfname;
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filename2 += metafname;
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#ifdef CONFIG_DEBUG
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std::cerr << "p3ConfigMgr::loadConfiguration() filename1 : " << filename1;
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// temporary files
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filename1_tmp = filename1 + ".tmp";
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filename2_tmp = filename2 + ".tmp";
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BinMemInterface* membio = new BinMemInterface(1000, BIN_FLAGS_READABLE);
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/*
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* Will attempt to get signature first from meta file then if that fails try temporary meta files, these will correspond to temp configs
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*/
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bool pass = getSignAttempt(filename2, filename1, membio);
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// if first attempt fails then try and temporary files
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if(!pass){
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#ifdef CONFIG_DEBUG
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std::cerr << "\np3ConfigMgr::loadConfiguration(): Trying to load METACONFIG item and METASIGN with temporary files";
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std::cerr << std::endl;
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std::cerr << "p3ConfigMgr::loadConfiguration() filename2 : " << filename2;
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std::cerr << std::endl;
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#endif
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#endif
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/* write signature to configuration */
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BinMemInterface *signbio = new BinMemInterface(1000, BIN_FLAGS_READABLE);
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pass = getSignAttempt(filename2_tmp, filename1_tmp, membio);
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if (!signbio->readfromfile(filename1.c_str()))
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{
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#ifdef CONFIG_DEBUG
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std::cerr << "p3ConfigMgr::loadConfiguration() Failed to Load MetaSignFile";
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std::cerr << std::endl;
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#endif
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/* HACK to load the old one (with the wrong directory)
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* THIS SHOULD BE REMOVED IN A COUPLE OF VERSIONS....
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* ONLY HERE TO CORRECT BAD MISTAKE IN EARLIER VERSIONS.
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*/
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filename1 = metasigfname;
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filename2 = metafname;
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if (!signbio->readfromfile(filename1.c_str()))
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{
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#ifdef CONFIG_DEBUG
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std::cerr << "p3ConfigMgr::loadConfiguration() HACK: Failed to Load ALT MetaSignFile";
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if(!pass){
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#ifdef CONFIG_DEBUG
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std::cerr << "\np3ConfigMgr::loadConfiguration(): failed to load METACONFIG item and METASIGN";
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std::cerr << std::endl;
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#endif
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#endif
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return;
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}
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else
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{
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#ifdef CONFIG_DEBUG
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std::cerr << "p3ConfigMgr::loadConfiguration() HACK: Loaded ALT MetaSignFile";
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std::cerr << std::endl;
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#endif
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}
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}
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std::string oldsignature((char *) signbio->memptr(), signbio->memsize());
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delete signbio;
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membio->fseek(0); /* go back to start of file */
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BinMemInterface *membio = new BinMemInterface(1000, BIN_FLAGS_READABLE);
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if (!membio->readfromfile(filename2.c_str()))
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{
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#ifdef CONFIG_DEBUG
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std::cerr << "p3ConfigMgr::loadConfiguration() Failed to Load MetaFile";
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std::cerr << std::endl;
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#endif
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// delete membio;
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// return ;
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}
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/* get signature */
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std::string signature;
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AuthSSL::getAuthSSL()->SignData(membio->memptr(), membio->memsize(), signature);
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#ifdef CONFIG_DEBUG
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std::cerr << "p3ConfigMgr::loadConfiguration() New MetaFile Signature:";
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std::cerr << std::endl;
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std::cerr << signature;
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std::cerr << std::endl;
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#endif
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#ifdef CONFIG_DEBUG
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std::cerr << "p3ConfigMgr::loadConfiguration() Orig MetaFile Signature:";
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std::cerr << std::endl;
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std::cerr << oldsignature;
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std::cerr << std::endl;
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#endif
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if (signature != oldsignature)
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{
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/* Failed */
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#ifdef CONFIG_DEBUG
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std::cerr << "p3ConfigMgr::loadConfiguration() Signature Check Failed";
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std::cerr << std::endl;
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#endif
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return;
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}
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membio->fseek(0); /* go to start */
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RsSerialiser *rss = new RsSerialiser();
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rss->addSerialType(new RsGeneralConfigSerialiser());
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pqistore stream(rss, "CONFIG", membio, BIN_FLAGS_READABLE);
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@ -361,6 +336,103 @@ void p3ConfigMgr::loadConfiguration()
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}
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bool p3ConfigMgr::getSignAttempt(std::string& metaConfigFname, std::string& metaSignFname, BinMemInterface* membio){
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#ifdef CONFIG_DEBUG
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std::cerr << "p3ConfigMgr::getSignAttempt() metaConfigFname : " << metaConfigFname;
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std::cerr << std::endl;
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std::cerr << "p3ConfigMgr::getSignAttempt() metaSignFname : " << metaSignFname;
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std::cerr << std::endl;
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#endif
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/* read signature */
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BinMemInterface *signbio = new BinMemInterface(1000, BIN_FLAGS_READABLE);
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if (!signbio->readfromfile(metaSignFname.c_str()))
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{
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#ifdef CONFIG_DEBUG
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std::cerr << "p3ConfigMgr::getSignAttempt() Failed to Load MetaSignFile";
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std::cerr << std::endl;
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#endif
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/* HACK to load the old one (with the wrong directory)
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* THIS SHOULD BE REMOVED IN A COUPLE OF VERSIONS....
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* ONLY HERE TO CORRECT BAD MISTAKE IN EARLIER VERSIONS.
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*/
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metaSignFname = metasigfname;
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metaConfigFname = metafname;
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if (!signbio->readfromfile(metaSignFname.c_str()))
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{
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#ifdef CONFIG_DEBUG
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std::cerr << "p3ConfigMgr::getSignAttempt() HACK: Failed to Load ALT MetaSignFile";
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std::cerr << std::endl;
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#endif
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}
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else
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{
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#ifdef CONFIG_DEBUG
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std::cerr << "p3ConfigMgr::getSignAttempt() HACK: Loaded ALT MetaSignFile";
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std::cerr << std::endl;
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#endif
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}
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}
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std::string oldsignature((char *) signbio->memptr(), signbio->memsize());
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delete signbio;
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if (!membio->readfromfile(metaConfigFname.c_str()))
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{
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#ifdef CONFIG_DEBUG
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std::cerr << "p3ConfigMgr::getSignAttempt() Failed to Load MetaFile";
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std::cerr << std::endl;
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#endif
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// delete membio;
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// return ;
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}
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/* get signature */
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std::string signature;
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AuthSSL::getAuthSSL()->SignData(membio->memptr(), membio->memsize(), signature);
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#ifdef CONFIG_DEBUG
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std::cerr << "p3ConfigMgr::getSignAttempt() New MetaFile Signature:";
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std::cerr << std::endl;
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std::cerr << signature;
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std::cerr << std::endl;
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#endif
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#ifdef CONFIG_DEBUG
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std::cerr << "p3ConfigMgr::getSignAttempt() Orig MetaFile Signature:";
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std::cerr << std::endl;
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std::cerr << oldsignature;
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std::cerr << std::endl;
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#endif
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if (signature != oldsignature)
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{
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/* Failed */
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#ifdef CONFIG_DEBUG
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std::cerr << "p3ConfigMgr::getSignAttempt() Signature Check Failed";
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std::cerr << std::endl;
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#endif
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return false;
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}
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#ifdef CONFIG_DEBUG
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std::cerr << "p3ConfigMgr::getSignAttempt() Signature Check Passed!";
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std::cerr << std::endl;
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#endif
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return true;
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}
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void p3ConfigMgr::addConfiguration(std::string file, pqiConfig *conf)
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{
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RsStackMutex stack(cfgMtx); /***** LOCK STACK MUTEX ****/
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@ -392,12 +464,53 @@ p3Config::p3Config(uint32_t t)
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return;
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}
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bool p3Config::loadConfiguration(std::string &loadHash)
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{
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std::list<RsItem *> load;
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std::list<RsItem *>::iterator it;
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std::string fname = Filename();
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std::string fnametmp = fname + ".tmp";
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std::string hashstr;
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std::list<RsItem *> load;
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#ifdef CONFIG_DEBUG
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std::string success_fname = fname;
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std::cerr << "p3Config::loadConfiguration(): Attempting to load configuration file" << fname << std::endl;
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#endif
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bool pass = getHashAttempt(loadHash, hashstr, fname, load);
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if(!pass){
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pass = getHashAttempt(loadHash, hashstr, fnametmp, load);
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#ifdef CONFIG_DEBUG
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success_fname = fnametmp;
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#endif
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if(!pass){
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#ifdef CONFIG_DEBUG
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std::cerr << "p3Config::loadConfiguratio() ERROR: Failed to get Hash" << std::endl;
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return false;
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#endif
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}
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}
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#ifdef CONFIG_DEBUG
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std::cerr << "p3Config::loadConfiguration(): SUCCESS: configuration file loaded" << success_fname << std::endl;
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#endif
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setHash(hashstr);
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// else okay
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return loadList(load);
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}
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bool p3Config::getHashAttempt(const std::string& loadHash, std::string& hashstr,const std::string& fname,
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std::list<RsItem *>& load){
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std::list<RsItem *>::iterator it;
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uint32_t bioflags = BIN_FLAGS_HASH_DATA | BIN_FLAGS_READABLE;
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uint32_t stream_flags = BIN_FLAGS_READABLE;
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@ -424,8 +537,9 @@ bool p3Config::loadConfiguration(std::string &loadHash)
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#endif
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/* check hash */
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std::string hashstr = bio->gethash();
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hashstr = bio->gethash();
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// if hash then atmpt load with temporary file
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if (hashstr != loadHash)
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{
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@ -441,13 +555,11 @@ bool p3Config::loadConfiguration(std::string &loadHash)
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}
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setHash("");
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return false;
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}
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setHash(hashstr);
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/* else okay */
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return loadList(load);
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//delete bio;
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return true;
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}
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@ -457,8 +569,10 @@ bool p3Config::saveConfiguration()
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bool cleanup = true;
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std::list<RsItem *> toSave = saveList(cleanup);
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std::string fname = Filename();
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std::string fnametmp = Filename()+".tmp";
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std::string fname = Filename(); // get configuration file name
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std::string fnametmp = Filename()+".tmp"; // temporary file for two pass save
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std::string fnametmpold = fnametmp + "_old";
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#ifdef CONFIG_DEBUG
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std::cerr << "Writting p3config file " << fname.c_str() << std::endl ;
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@ -499,30 +613,59 @@ bool p3Config::saveConfiguration()
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* protecting saveList() data
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*/
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// so early?
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delete stream ;
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/**
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* ensures real old config is alway present in file system, leave of config as tmp file
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*/
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if(!written)
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return false ;
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#ifdef CONFIG_DEBUG
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std::cerr << "renaming " << fnametmp.c_str() << " to " << fname.c_str() << std::endl;
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std::cerr << "p3config::saveConfiguration() renaming " << fnametmp.c_str() << " to " << fname.c_str() << std::endl;
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#endif
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if(!RsDirUtil::renameFile(fnametmp,fname))
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{
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std::ostringstream errlog;
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#ifdef WIN32
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errlog << "Error " << GetLastError() ;
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#else
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errlog << "Error " << errno ;
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#endif
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getPqiNotify()->AddSysMessage(0, RS_SYS_WARNING, "File rename error", "Error while renaming file " + fname + ": got error "+errlog.str());
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return false ;
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// first write old config to old-temp file
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ifstream ifstrm;
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ofstream ofstrm;
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ifstrm.open(fname.c_str(), std::ifstream::binary);
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std::cerr << "p3config::saveConfiguration() Is file open: " << ifstrm.is_open();
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// if file does not exist then open temporay file already created
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if(!ifstrm.is_open()){
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ifstrm.close();
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ifstrm.open(fnametmp.c_str(), std::ifstream::binary);
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}
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// determine size of old config file
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ifstrm.seekg(0, std::ios_base::end);
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std::streampos length = ifstrm.tellg();
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ifstrm.seekg(0);
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//read this into a buffer
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char* buff = new char[length];
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ifstrm.read(buff, length);
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ifstrm.close();
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// write to config_old file
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ofstrm.open(fnametmpold.c_str(), std::ofstream::binary);
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ofstrm.write(buff, length);
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ofstrm.close();
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// now rename new temp config file to current(fname) and old config file to temp (fnametmp)
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if(!RsDirUtil::renameFile(fnametmp, fname) || !RsDirUtil::renameFile(fnametmpold, fnametmp)){
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std::cerr << "ERROR!" << std::endl;
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#ifdef CONFIG_DEBUG
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std::cerr << "p3Config::saveConfiguration(): Failed to Rename" << std::endl;
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#endif
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}
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#ifdef CONFIG_DEBUG
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std::cerr << "Successfully wrote p3config file " << fname.c_str() << std::endl ;
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#endif
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/* else okay */
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|
||||
delete buff;
|
||||
// delete bio;
|
||||
return true;
|
||||
}
|
||||
|
||||
|
||||
@ -35,6 +35,7 @@
|
||||
#include "pqi/pqiindic.h"
|
||||
#include "pqi/pqinetwork.h"
|
||||
#include "util/rsthreads.h"
|
||||
#include "pqi/pqibin.h"
|
||||
|
||||
/***** Configuration Management *****
|
||||
*
|
||||
@ -102,11 +103,30 @@ class pqiConfig
|
||||
pqiConfig(uint32_t t);
|
||||
virtual ~pqiConfig();
|
||||
|
||||
/**
|
||||
* @param loadHash This is hash that will be compared to confirm that data has not been tampered with
|
||||
*/
|
||||
virtual bool loadConfiguration(std::string &loadHash) = 0;
|
||||
|
||||
/**
|
||||
* @param This should
|
||||
*/
|
||||
virtual bool saveConfiguration() = 0;
|
||||
|
||||
/**
|
||||
* The type of configuration, see ids where this class is declared
|
||||
*/
|
||||
uint32_t Type();
|
||||
|
||||
/**
|
||||
* The name of the configuration file
|
||||
*/
|
||||
std::string Filename();
|
||||
|
||||
/**
|
||||
* The hash computed for this configuration, can use this to compare to externally stored hash
|
||||
* for validation checking
|
||||
*/
|
||||
std::string Hash();
|
||||
|
||||
protected:
|
||||
@ -118,8 +138,15 @@ void setHash(std::string h);
|
||||
|
||||
private:
|
||||
|
||||
void setFilename(std::string name);
|
||||
bool HasConfigChanged(uint16_t idx);
|
||||
/**
|
||||
* This sets the name of the pqi configuation file
|
||||
*/
|
||||
void setFilename(std::string name);
|
||||
|
||||
/**
|
||||
* @param an index for the Confind which contains list of configuarations that can be tracked
|
||||
*/
|
||||
bool HasConfigChanged(uint16_t idx);
|
||||
|
||||
Indicator ConfInd;
|
||||
|
||||
@ -144,18 +171,39 @@ class p3ConfigMgr
|
||||
public:
|
||||
p3ConfigMgr(std::string bdir, std::string fname, std::string signame);
|
||||
|
||||
void tick();
|
||||
void saveConfiguration();
|
||||
void loadConfiguration();
|
||||
void addConfiguration(std::string file, pqiConfig *conf);
|
||||
/**
|
||||
* Called from Rs server to check configuration and update configurations
|
||||
*/
|
||||
void tick();
|
||||
|
||||
/* saves config, and disables further saving
|
||||
* used for exiting the system
|
||||
*/
|
||||
void completeConfiguration();
|
||||
/**
|
||||
* save all added configuation including configuration files
|
||||
*/
|
||||
void saveConfiguration();
|
||||
|
||||
/**
|
||||
* save all loaded configurations
|
||||
*/
|
||||
void loadConfiguration();
|
||||
|
||||
/**
|
||||
* @param file The name for new configuration
|
||||
* @param conf to the configuration to use
|
||||
*/
|
||||
void addConfiguration(std::string file, pqiConfig *conf);
|
||||
|
||||
/* saves config, and disables further saving
|
||||
* used for exiting the system
|
||||
*/
|
||||
void completeConfiguration();
|
||||
|
||||
private:
|
||||
|
||||
/**
|
||||
* To be called from load configuration
|
||||
*/
|
||||
bool getSignAttempt(std::string& metaConfigFname, std::string& metaSignFname, BinMemInterface* membio);
|
||||
|
||||
const std::string basedir;
|
||||
const std::string metafname;
|
||||
const std::string metasigfname;
|
||||
@ -188,6 +236,12 @@ virtual bool loadList(std::list<RsItem *> load) = 0;
|
||||
*/
|
||||
virtual void saveDone() { return; }
|
||||
|
||||
private:
|
||||
|
||||
//helper function for retrieving correct hash using a temporary directory
|
||||
virtual bool getHashAttempt(const std::string& loadHash, std::string& hashstr, const std::string& fname, std::list<RsItem *>& load);
|
||||
|
||||
|
||||
}; /* end of p3Config */
|
||||
|
||||
|
||||
@ -211,6 +265,8 @@ virtual bool loadList(std::list<RsItem *> load);
|
||||
|
||||
/* protected by pqiConfig mutex as well! */
|
||||
std::map<std::string, std::string> settings;
|
||||
|
||||
|
||||
};
|
||||
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user