using namespace std;
static const unsigned int bytes_in_block = 0x800;
-static const char * dbname = "/var/tmp/backups.db";
-
-unsigned long long current_time() {
- unsigned long long rc = 0;
- time_t now_tt = time( 0 );
- tm *now = localtime( &now_tt );
- rc += ( now->tm_year + 1900ULL ) * 10000000000ULL;
- rc += ( now->tm_mon + 1ULL ) * 100000000ULL;
- rc += now->tm_mday * 1000000ULL;
- rc += now->tm_hour * 10000ULL;
- rc += now->tm_min * 100ULL;
- rc += now->tm_sec;
-
- return rc;
+static const char * dbname = "/var/lib/backups/backups.db";
+
+unsigned long long read_time( istream &i ) {
+ string date_string;
+
+ int c;
+ // Todo, don't use char_traits<char> directly here
+ for( c = i.get(); 0 != c && char_traits<char>::eof() != c; c = i.get() ) {
+ date_string.push_back( c );
+ }
+ if( char_traits<char>::eof() == c ) { i.setstate( ios_base::eofbit ); }
+
+ return atoll( date_string.c_str() );
}
template<class I, class O, class INT>
bool copy_until_full( I begin, I end, O out, INT &space ) {
bool complete = true;
- I i = begin;
- while( 0 != space && i != end ) {
- INT size = (*i)->getFileSize();
+ while( 0 != space && begin != end ) {
+ INT size = (*begin)->getFileSize();
INT blocksize = blocks( size ) * bytes_in_block;
if( blocksize <= space ) {
space -= blocksize;
- out = *i;
+ out = *begin;
++out;
} else {
// We missed a file that should be included so the backup is not complete
complete = false;
}
- ++i;
+ ++begin;
}
return complete;
}
SET &added, SET &common, SET &old_common, SET &deleted ) {
FileDataNameCmp cmp;
- set_difference( current.begin(), current.end(),
- old.begin(), old.end(),
- inserter( added, added.begin() ),
- cmp );
-
- set_difference( old.begin(), old.end(),
- current.begin(), current.end(),
- inserter( deleted, deleted.begin() ),
- cmp );
-
- set_union( current.begin(), current.end(),
- old.begin(), old.end(),
- inserter( common, common.begin() ),
- cmp );
-
- set_union( old.begin(), old.end(),
- common.begin(), common.end(),
- inserter( old_common, old_common.begin() ),
- cmp );
+ set_difference( current.begin(), current.end(),
+ old.begin(), old.end(),
+ inserter( added, added.begin() ),
+ cmp );
+
+ set_difference( old.begin(), old.end(),
+ current.begin(), current.end(),
+ inserter( deleted, deleted.begin() ),
+ cmp );
+
+ set_intersection( current.begin(), current.end(),
+ old.begin(), old.end(),
+ inserter( common, common.begin() ),
+ cmp );
+
+ set_intersection( old.begin(), old.end(),
+ common.begin(), common.end(),
+ inserter( old_common, old_common.begin() ),
+ cmp );
}
template<class INT>
numbytes += filesize;
numblocks += blocks( filesize );
- begin++;
+ ++begin;
+ }
+}
+
+template<class I, class O>
+void copy_filenames( I begin, const I &end, O out ) {
+ while( begin != end ) {
+ string output = (*begin)->getFileName();
+ output.push_back( 0 );
+ *out = output;
+ ++out;
+ ++begin;
+ }
+}
+
+template<class ITER>
+void updateLastBackupDate( ITER begin, const ITER &end, unsigned long long date ) {
+ while( begin != end ) {
+ (*begin)->setLastBackupDate( date );
+ ++begin;
+ }
+}
+
+template<class ITER>
+void delete_objects( ITER begin, const ITER &end ) {
+ while( begin != end ) {
+ delete *begin;
+ ++begin;
}
}
int main() {
+ // Get the date on stdin
+ unsigned long long now = read_time( cin );
+
// Parse the list of current files on stdin
file_set current;
populate_set( cin, current );
// Now find the list of files to backup.
file_set backups;
- insert_iterator<file_set> backups_i( backups, backups.begin() );
// backup all added files
- copy( added.begin(), added.end(), backups_i );
+ copy( added.begin(), added.end(), inserter( backups, backups.begin() ) );
// Track the total size of added files
unsigned long long added_blocks, added_bytes;
- sizes( backups.begin(), backups.end(), added_blocks, added_bytes );
+ sizes( added.begin(), added.end(), added_blocks, added_bytes );
- file_vector modified_files;
+ file_vector modified_v;
// Backup files that have been modified
file_set::iterator i = common.begin(), j = old_common.begin();
for( ; i != common.end(); ++i, ++j ) {
(*i)->setLastBackupDate( (*j)->getLastBackupDate() );
- if( needs_backup( *j, *i ) ) modified_files.push_back( *i );
+ if( needs_backup( *j, *i ) ) modified_v.push_back( *i );
}
- copy( modified_files.begin(), modified_files.end(), backups_i );
+ copy( modified_v.begin(), modified_v.end(), inserter( backups, backups.begin() ) );
// Track the total size of modified files
unsigned long long modified_blocks, modified_bytes;
- sizes( modified_files.begin(), modified_files.end(), modified_blocks, modified_bytes );
+ sizes( modified_v.begin(), modified_v.end(), modified_blocks, modified_bytes );
// Now, sort the backups by filesize and build a list that'll fit on a DVD
file_vector backups_s;
sort( backups_s.begin(), backups_s.end(), sizecmp );
file_set final;
- unsigned long long space = 0x100000000ULL; // After looking at how big the ISO can be and how many 1K blocks are left after formatting the filesystem I decided on an even 4GB target
+ unsigned long long space = 0x100000000ULL;
insert_iterator<file_set> final_i( final, final.begin() );
// Copy files over until full or out of files
- bool complete = copy_until_full( backups_s.rbegin(),
- backups_s.rend(),
- final_i,
- space );
+ bool complete
+ = copy_until_full( backups_s.rbegin(), backups_s.rend(), final_i, space );
// Track the size filled up by essential backups
unsigned long long essential_blocks, essential_bytes;
unsigned long long total_blocks, total_bytes;
sizes( final.begin(), final.end(), total_blocks, total_bytes );
- unsigned long long now = current_time();
- for( file_set::iterator k = final.begin(); k != final.end(); ++k ) {
- (*k)->setLastBackupDate( now );
- }
+ updateLastBackupDate( final.begin(), final.end(), now );
// Write the 'current' list to the dbfile
ofstream dbout( dbname );
- copy( current.begin(), current.end(), ostream_iterator<FileData*>( dbout, "" ) );
+ copy( current.begin(), current.end(), ostream_iterator<FileData*>( dbout ) );
// Write the 'final' list to stdout
- copy( final.begin(), final.end(), ostream_iterator<FileData*>( cout, "" ) );
+ copy_filenames( final.begin(), final.end(), ostream_iterator<string>( cout ) );
+
+ cerr << now << endl << endl;
cerr << "Need backing up..." << endl;
cerr << " Added Bytes: " << added_bytes << endl;
if( ! complete ) { cerr << "Backup is incomplete!" << endl; }
// Clean-up
- for( file_set::iterator i = backed_up.begin(); i != backed_up.end(); ++i ) { delete *i; }
- for( file_set::iterator i = current.begin(); i != current.end(); ++i ) { delete *i; }
+ delete_objects( backed_up.begin(), backed_up.end() );
+ delete_objects( current.begin(), current.end() );
}