X-Git-Url: http://git.pippins.net/embedvideo/.git/?a=blobdiff_plain;f=main.cpp;h=638f15f7441245e18474bb6507fe3c8911c791bc;hb=refs%2Ftags%2Frelease-0.2.1;hp=8540adfb56c480db0d6284b3811bafd051773ec2;hpb=ddc36cb7ada4575030f31894eba76c3fc96e2826;p=backups%2F.git

diff --git a/main.cpp b/main.cpp
index 8540adf..638f15f 100644
--- a/main.cpp
+++ b/main.cpp
@@ -4,13 +4,15 @@
 #include <algorithm>
 #include <cassert>
 #include <ctime>
+#include <math.h>
 
 #include "filedata.hpp"
 
 using namespace std;
 
-static const unsigned int bytes_in_block = 0x800;
-static const char * dbname = "/var/lib/backups/backups.db";
+static unsigned int bytes_in_block;
+static const char * dbname_in = getenv("backupdbin");
+static const char * dbname_out = getenv("backupdbout");
 
 unsigned long long read_time( istream &i ) {
   string date_string;
@@ -35,7 +37,7 @@ bool copy_until_full( I begin, I end, O out, INT &space ) {
 
     if( blocksize <= space ) {
       space -= blocksize;
-      out = *begin;
+      *out = *begin;
       ++out;
     } else {
       // We missed a file that should be included so the backup is not complete
@@ -62,27 +64,25 @@ void populate_set( istream &in, SET &files ) {
 template<class SET>
 void partition_sets( const SET &current, const SET &old,
                      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 );
+                    FileData::namecmp );
 
   set_difference(   old.begin(),     old.end(),
                     current.begin(), current.end(),
                     inserter( deleted, deleted.begin() ),
-                    cmp );
+                    FileData::namecmp );
 
   set_intersection( current.begin(), current.end(),
                     old.begin(),     old.end(),
                     inserter( common, common.begin() ),
-                    cmp );
+                    FileData::namecmp );
 
   set_intersection( old.begin(),    old.end(),
                     common.begin(), common.end(),
                     inserter( old_common, old_common.begin() ),
-                    cmp );
+                    FileData::namecmp );
 }
 
 template<class INT>
@@ -135,6 +135,20 @@ void delete_objects( ITER begin, const ITER &end ) {
 }
 
 int main() {
+
+  // Check to make sure required env variables are set
+  if( getenv( "backupdbin"  ) == NULL ||
+      getenv( "backupdbout" ) == NULL ||
+      getenv( "blocksize"   ) == NULL ||
+      getenv( "availsizemb" ) == NULL )
+  {
+     cerr << "Required environment variables are not set. Exiting." << endl;
+     return 1;
+  }
+
+  // Setup our bytes_in_block value
+  bytes_in_block = atoll(getenv("blocksize"));
+
   // Get the date on stdin
   unsigned long long now = read_time( cin );
 
@@ -143,7 +157,7 @@ int main() {
   populate_set( cin, current );
 
   file_set backed_up;
-  ifstream db( dbname );
+  ifstream db( dbname_in );
   if( db && db.good() ) {
     populate_set( db, backed_up );
   }
@@ -182,11 +196,11 @@ int main() {
   file_vector backups_s;
   copy( backups.begin(), backups.end(), back_inserter( backups_s ) );
 
-  FileDataSizeCmp sizecmp;
-  sort( backups_s.rbegin(), backups_s.rend(), sizecmp );
+  sort( backups_s.rbegin(), backups_s.rend(), FileData::sizecmp );
 
   file_set final;
-  unsigned long long space = 0x100000000ULL;
+  const unsigned long long availsizemb = atoll( getenv("availsizemb") ) * 0x100000ull;
+  unsigned long long space = availsizemb;
 
   insert_iterator<file_set> final_i( final, final.begin() );
 
@@ -203,17 +217,15 @@ int main() {
   // collection left with actual content.
   if( 0 != space ) {
     file_vector leftovers;
-    FileDataNameCmp cmp;
     set_difference( current.begin(), current.end(),
                     final.begin(),   final.end(),
                     back_inserter( leftovers ),
-                    cmp );
+                    FileData::namecmp );
 
-    FileDataLastBackupCmp lastbackupcmp;
-    // Achieve 'last back date then by filesize' by first sorting by filesizing
+    // Achieve 'last backup date then by filesize' by first sorting by filesize
     // and then running stable sort by last backup date.
-    sort(        leftovers.rbegin(), leftovers.rend(), sizecmp );
-    stable_sort( leftovers.begin(),  leftovers.end(),  lastbackupcmp );
+    sort(        leftovers.rbegin(), leftovers.rend(), FileData::sizecmp );
+    stable_sort( leftovers.begin(),  leftovers.end(),  FileData::lastbackupcmp );
 
     copy_until_full( leftovers.begin(), leftovers.end(), final_i, space );
   }
@@ -222,10 +234,17 @@ int main() {
   unsigned long long total_blocks, total_bytes;
   sizes( final.begin(), final.end(), total_blocks, total_bytes );
 
+  // Track how many disks there are remaining to be burned
+  unsigned long long disks_remaining = 0;
+  if(modified_bytes || added_bytes)
+    disks_remaining = static_cast<unsigned long long>(
+        ceil( static_cast<double>( modified_bytes + added_bytes ) / availsizemb ) - 1
+        );
+
   updateLastBackupDate( final.begin(), final.end(), now );
 
   // Write the 'current' list to the dbfile
-  ofstream dbout( dbname );
+  ofstream dbout( dbname_out );
   copy( current.begin(), current.end(), ostream_iterator<FileData*>( dbout ) );
 
   // Write the 'final' list to stdout
@@ -237,7 +256,8 @@ int main() {
   cerr << "	Added Bytes:		" << added_bytes << endl;
   cerr << "	Added Blocks:		" << added_blocks << endl;
   cerr << "	Modified Bytes:		" << modified_bytes << endl;
-  cerr << "	Modified Blocks:	" << modified_blocks << endl << endl;
+  cerr << "	Modified Blocks:	" << modified_blocks << endl;
+  cerr << "	  Disks Remaining:	" << disks_remaining << endl << endl;
 
   cerr << "Will be backed up..." << endl;
   cerr << "	Essential Bytes:	" << essential_bytes << endl;