175 lines
2.9 KiB
C++
Executable File
175 lines
2.9 KiB
C++
Executable File
/*
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* This file is a part of Winix
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* and is not publicly distributed
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*
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* Copyright (c) 2009, Tomasz Sowa
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* All rights reserved.
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*
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*/
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#include "mounts.h"
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#include "request.h"
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#include "log.h"
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#include "mountparser.h"
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#include "db.h"
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Mounts::Mounts()
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{
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pmount = 0;
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}
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void Mounts::SetDirs(Dirs * pdirs)
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{
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dirs = pdirs;
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}
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void Mounts::SetDb(Db * pdb)
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{
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db = pdb;
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}
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void Mounts::SetRequest(Request * prequest)
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{
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request = prequest;
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}
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// reading from 'mounts'
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Error Mounts::ReadMounts(const std::string & mounts)
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{
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MountParser mp;
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mp.SetDirs(dirs);
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Error err = mp.Parse(mounts, mount_tab);
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if( err != WINIX_ERR_OK )
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{
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log << log1 << "M: some problems with mountpoints (mountpoints table will be empty)" << logend;
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mount_tab.clear();
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}
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CalcCurMount();
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return err;
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}
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// reading from /etc/fstab
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Error Mounts::ReadMounts()
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{
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static std::string file = "fstab";
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Item * etc = dirs->GetEtcDir();
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if( !etc )
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{
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log << log1 << "M: there is no /etc directory" << logend;
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return WINIX_ERR_NO_ITEM;
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}
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Item fstab;
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Error err = db->GetItem(etc->id, file, fstab);
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if( err == WINIX_ERR_NO_ITEM )
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{
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log << log1 << "M: there is no /etc/fstab file" << logend;
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return err;
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}
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if( err != WINIX_ERR_OK )
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{
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log << log1 << "M: cannot read /etc/fstab" << logend;
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return err;
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}
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return ReadMounts(fstab.content);
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}
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void Mounts::MountCmsForRoot()
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{
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Mount mount;
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mount.type = Mount::cms;
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mount.fs = Mount::simplefs;
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Item * proot = dirs->GetRootDir();
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if( proot )
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mount.dir_id = proot->id;
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else
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{
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mount.dir_id = -1;
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log << log1 << "M: there is no a root dir" << logend;
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}
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std::pair<MountTab::iterator, bool> res = mount_tab.insert( std::make_pair(mount.dir_id, mount) );
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pmount = &(res.first->second);
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}
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void Mounts::CalcCurMount()
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{
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std::vector<Item*>::reverse_iterator i;
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// when the program starts (when the dir_tab is empty()
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// we don't want to call MountCmsForRoot()
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if( request->dir_tab.empty() )
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return;
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for(i = request->dir_tab.rbegin() ; i!=request->dir_tab.rend() ; ++i)
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{
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std::map<long, Mount>::iterator m = mount_tab.find( (*i)->id );
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if( m != mount_tab.end() )
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{
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pmount = &(m->second);
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log << log2 << "M: current mount point is: " << pmount->TypeToStr()
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<< ", fs: " << pmount->FsToStr() << logend;
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return;
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}
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}
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// if nothing was found
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// we assume that 'cms' mount point is used
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MountCmsForRoot();
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log << log2 << "M: current mount point is: " << pmount->TypeToStr() << " (default)"
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<< ", fs: " << pmount->FsToStr() << logend;
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}
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// can return null pointer
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// and we don't assume cms as a default mount point if nothing is found
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Mount * Mounts::CalcMount(long dir_id)
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{
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while( true )
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{
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Item * pdir = dirs->GetDir(dir_id);
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if( !pdir )
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return 0;
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std::map<long, Mount>::iterator m = mount_tab.find( pdir->id );
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if( m != mount_tab.end() )
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return &(m->second);
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dir_id = pdir->parent_id;
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}
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}
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const Mounts::MountTab * Mounts::GetMountTab()
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{
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return &mount_tab;
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}
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