EtcFstab.h

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#ifndef ETC_FSTAB_H
#define ETC_FSTAB_H

#include <string>
#include <list>
#include <map>

#include "y2storage/StorageInterface.h"
#include "y2storage/AppUtil.h"

namespace storage
{

class AsciiFile;
struct FstabChange;

struct FstabEntry
    {
    FstabEntry() { freq=passno=0; 
                   crypto=cryptt=loop=noauto=dmcrypt=tmpcrypt=false;
                   encr=storage::ENC_NONE; mount_by=storage::MOUNTBY_DEVICE; }
    FstabEntry& operator=( const FstabChange& rhs );
    friend std::ostream& operator<< (std::ostream& s, const FstabEntry &v );

    string device;
    string dentry;
    string mount;
    string fs;
    std::list<string> opts;
    int freq;
    int passno;
    bool loop;
    bool dmcrypt;
    bool noauto;
    bool crypto;
    bool cryptt;
    bool tmpcrypt;
    string loop_dev;
    string cr_opts;
    string cr_key;
    string cr_info;
    storage::EncryptType encr;
    storage::MountByType mount_by;

    void calcDependent();
    };

inline std::ostream& operator<< (std::ostream& s, const FstabEntry &v )
    {
    s << "device:" << v.device
      << " dentry:" << v.dentry << " mount:" << v.mount
      << " fs:" << v.fs << " opts:" << mergeString( v.opts, "," )
      << " freq:" << v.freq << " passno:" << v.passno;
    if( v.noauto )
        s << " noauto";
    if( v.crypto )
        s << " crypto";
    if( v.cryptt )
        s << " cryptt";
    if( v.tmpcrypt )
        s << " tmpcrypt";
    if( v.loop )
        s << " loop";
    if( v.dmcrypt )
        s << " dmcrypt";
    if( !v.loop_dev.empty() )
        s << " loop_dev:" << v.loop_dev;
    if( !v.cr_key.empty() )
        s << " cr_key:" << v.cr_key;
    if( !v.cr_opts.empty() )
        s << " cr_opts:" << v.cr_opts;
    if( !v.cr_info.empty() )
        s << " cr_info:" << v.cr_info;
    if( v.encr != storage::ENC_NONE )
        s << " encr:" << v.encr;
    return( s );
    }

struct FstabChange
    {
    FstabChange() { freq=passno=0; encr=storage::ENC_NONE; tmpcrypt=false; }
    FstabChange( const FstabEntry& e ) { *this = e; }
    FstabChange& operator=( const FstabEntry& rhs )
        {
        device = rhs.device;
        dentry = rhs.dentry; mount = rhs.mount; fs = rhs.fs;
        opts = rhs.opts; freq = rhs.freq; passno = rhs.passno;
        loop_dev = rhs.loop_dev; encr = rhs.encr; 
        tmpcrypt = rhs.tmpcrypt;
        return( *this );
        }
    friend std::ostream& operator<< (std::ostream& s, const FstabChange &v );
    string device;
    string dentry;
    string mount;
    string fs;
    std::list<string> opts;
    int freq;
    int passno;
    string loop_dev;
    storage::EncryptType encr;
    bool tmpcrypt;
    };

inline FstabEntry& FstabEntry::operator=( const FstabChange& rhs )
    {
    device = rhs.device;
    dentry = rhs.dentry; mount = rhs.mount; fs = rhs.fs;
    opts = rhs.opts; freq = rhs.freq; passno = rhs.passno;
    loop_dev = rhs.loop_dev; encr = rhs.encr;
    tmpcrypt = rhs.tmpcrypt;
    calcDependent();
    return( *this );
    }

inline std::ostream& operator<< (std::ostream& s, const FstabChange &v )
    {
    s << "device:" << v.device
      << " dentry:" << v.dentry << " mount:" << v.mount
      << " fs:" << v.fs << " opts:" << mergeString( v.opts, "," )
      << " freq:" << v.freq << " passno:" << v.passno;
    if( !v.loop_dev.empty() )
        s << " loop_dev:" << v.loop_dev;
    if( v.encr != storage::ENC_NONE )
        s << " encr:" << v.encr;
    if( v.tmpcrypt )
        s << " tmpcrypt";
    return( s );
    }

class EtcFstab
    {
    public:
        EtcFstab( const string& prefix = "", bool rootMounted=true );
        bool findDevice( const string& dev, FstabEntry& entry ) const;
        bool findDevice( const std::list<string>& dl, FstabEntry& entry ) const;
        bool findMount( const string& mount, FstabEntry& entry ) const;
        bool findUuidLabel( const string& uuid, const string& label,
                            FstabEntry& entry ) const;
        bool findIdPath( const std::list<string>& id, const string& path,
                         FstabEntry& entry ) const;
        void setDevice( const FstabEntry& entry, const string& device );
        int updateEntry( const string& dev, const string& mount,
                         const string& fs, const string& opts="defaults" );
        int updateEntry( const FstabChange& entry );
        int addEntry( const FstabChange& entry );
        int removeEntry( const FstabEntry& entry );
        int changeRootPrefix( const string& prfix );
        void getFileBasedLoops( const string& prefix, std::list<FstabEntry>& l );
        void getEntries( std::list<FstabEntry>& l );
        string addText( bool doing, bool crypto, const string& mp );
        string updateText( bool doing, bool crypto, const string& mp );
        string removeText( bool doing, bool crypto, const string& mp );
        int flush();
        int findPrefix( const AsciiFile& tab, const string& mount );

    protected:
        struct Entry
            {
            enum operation { NONE, ADD, REMOVE, UPDATE };
            Entry() { op=NONE; }
            operation op;
            FstabEntry nnew;
            FstabEntry old;
            };

        void readFiles();
        AsciiFile* findFile( const FstabEntry& e, AsciiFile*& fstab,
                             AsciiFile*& cryptotab, int& lineno );
        bool findCrtab( const FstabEntry& e, const AsciiFile& crtab,
                        int& lineno );
        bool findCrtab( const string& device, const AsciiFile& crtab,
                        int& lineno );
        void makeStringList( const FstabEntry& e, std::list<string>& ls );
        void makeCrtabStringList( const FstabEntry& e, std::list<string>& ls );
        string updateLine( const std::list<string>& ol, 
                           const std::list<string>& nl, const string& line );
        string createLine( const std::list<string>& ls, unsigned fields, 
                           unsigned* flen );
        string createTabLine( const FstabEntry& e );
        void makeCrStringList( const FstabEntry& e, std::list<string>& ls );
        string createCrtabLine( const FstabEntry& e );

        static unsigned fstabFields[6];
        static unsigned cryptotabFields[6];
        static unsigned crypttabFields[6];

        string prefix;
        std::list<Entry> co;
    };

}

#endif

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