Update:<\/p>\n
Versions of the files below may be downloaded here<\/a>.\u00a0 This post is probably still useful as documentation.<\/p>\n <\/p>\n <\/p>\n This isn’t specific to BackupPC<\/a> by any means, but I’ll preface this with a brief explanation:\u00a0 BackupPC<\/a> is a “set it and forget it” backup system driven from the server, that allows you to back up the entire network of *nix and Windows PCs.\u00a0 It doesn’t require any software on the systems it backs up at all, since it relies upon rsync and smbclient, and optionally ssh.<\/p>\n For *nix, this works beautifully.\u00a0 For Windows, this also works beautifully, except that “open files” can’t be backed up at all.\u00a0 This problem isn’t unique to BackupPC, any attempt to back up or copy these files will fail, so most commercial backup systems have special “open file” clients to cope with it.<\/p>\n The official Windows solution for XP and later is something called a “volume shadow copy<\/a>.”\u00a0 It’s probably far more complex than it possibly needs to be, but essentially, it creates a pseudo-volume for any actual volume, with the difference being that you can actually back up files on it.\u00a0 So, this can be handily used for rsync in order to make full backups, including every single file…\u00a0 in theory, anyway.<\/p>\n My goals in getting this working:<\/p>\n It took quite a bit of trial-and-error, so I’ll skip what didn’t work, and get straight to what actually does<\/em> work.\u00a0 There are a few required components:<\/p>\n Once all the pieces are assembled, I created a C:\\BackupPC directory on the Windows box with all the necessary files.\u00a0 Note that rsync does not<\/em> need to be installed as a service, it actually gets loaded on-the-fly.\u00a0 (Note that this directory is hard-coded in a lot of the files.) Here’s a listing of that directory:<\/p>\n So, here’s how it works.\u00a0 Before each backup, BackupPC has an option to call a local script first, waiting for that script to finish.\u00a0 Here’s the execution chain:<\/p>\n Once the backup is completed, another local script is run — here’s its execution chain:<\/p>\n Sure, it seems simple, but a lot of work went into that, since there are a lot of nuances to sort out.\u00a0 Here are the file listings:<\/p>\n preusercmd.sh<\/strong><\/p>\n pre-exec.cmd<\/strong><\/p>\n pre-cmd.vbs<\/strong><\/p>\n sleep.vbs<\/strong><\/p>\n backuppc.cmd<\/strong><\/p>\n vsrsync.cmd<\/strong><\/p>\n rsyncd.conf<\/strong><\/p>\n postusercmd.sh<\/strong><\/p>\n Update: Versions of the files below may be downloaded here.\u00a0 This post is probably still useful as documentation. This isn’t specific to BackupPC by any means, but I’ll preface this with a brief explanation:\u00a0 BackupPC is a “set it and forget it” backup system driven from the server, \u2026 Continue reading
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Directory of C:\\BackupPC\r\n08\/08\/2008 07:11 PM 65 backuppc.cmd\r\n08\/10\/2008 12:56 PM 1,928 cwrsync.cmd\r\n07\/22\/2008 04:30 PM 1,082,368 cygcrypto-0.9.8.dll\r\n04\/11\/2008 07:03 AM 999,424 cygiconv-2.dll\r\n04\/11\/2008 07:03 AM 31,744 cygintl-3.dll\r\n04\/11\/2008 07:03 AM 20,480 cygminires.dll\r\n07\/22\/2008 04:30 PM 1,872,884 cygwin1.dll\r\n04\/11\/2008 07:03 AM 66,048 cygz.dll\r\n09\/28\/2004 02:07 PM 6,656 dosdev.exe\r\n08\/11\/2008 11:08 PM 1,000 pre-cmd.vbs\r\n08\/11\/2008 11:05 PM 44 pre-exec.cmd\r\n07\/22\/2008 02:26 PM 348,160 rsync.exe\r\n08\/11\/2008 10:12 PM 161 rsyncd.conf\r\n08\/11\/2008 10:12 PM 22 rsyncd.secrets\r\n08\/11\/2008 11:26 PM 1,177 sleep.vbs\r\n06\/08\/2005 03:17 PM 294,912 vshadow.exe\r\n08\/11\/2008 10:09 PM 581 vsrsync.cmd\r\n08\/11\/2008 11:33 PM 308 vss-setvar.cmd<\/pre>\n
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#!\/bin\/bash\r\nWINEXE=\/usr\/bin\/winexe\r\nUNAME=\"Administrator\"\r\nPWD=\"admin.password\"\r\nWRKGRP=\"WORKGROUP\"\r\nBOX=$1\r\n$WINEXE --interactive=0 -U $UNAME -W $WRKGRP --password=$PWD \/\/$BOX 'cmd \/c c:\\backuppc\\pre-exec.cmd'\r\nsleep 5\r\necho \"Rsync and shadow copy loaded\"\r\nkill $$\r\n# The script needs to be killed, otherwise, winexe waits for input<\/pre>\n
cd \\backuppc\r\n@echo off\r\ncscript pre-cmd.vbs<\/pre>\n
Const Flag = \"C:\\BackupPC\\rsyncd.pid\"\r\n'\r\n' Pid file shouldn't be there already\r\n'\r\nIf DoesFileExist(Flag)=0 Then\r\n Set fso = CreateObject(\"Scripting.FileSystemObject\")\r\n Set aFile = fso.GetFile(Flag)\r\n aFile.Delete\r\nEnd If\r\n'\r\n' Nor should \"wake.up\"\r\n'\r\nIf DoesFileExist(\"C:\\BackupPC\\wake.up\")=0 Then\r\n Set fso = CreateObject(\"Scripting.FileSystemObject\")\r\n Set aFile = fso.GetFile(\"C:\\BackupPC\\wake.up\")\r\n aFile.Delete\r\nEnd If\r\n'\r\nSet objShell = CreateObject(\"WScript.Shell\")\r\nobjShell.Exec \"cscript C:\\BackupPC\\sleep.vbs\"\r\n'\r\nSet objShell = CreateObject(\"WScript.Shell\")\r\nobjShell.Exec \"C:\\BackupPC\\backuppc.cmd > C:\\BackupPC\\file.out\"\r\n'\r\n' Just sleep until the file \"rsyncd.pid\" appears\r\n'\r\nWhile DoesFileExist(Flag)\r\n wscript.sleep 10000\r\nWend\r\n'\r\n' functions\r\n'\r\nfunction DoesFileExist(FilePath)\r\nDim fso\r\n\tSet fso = CreateObject(\"Scripting.FileSystemObject\")\r\n\tif not fso.FileExists(FilePath) then\r\n\t\tDoesFileExist = -1\r\n\telse\r\n\t\tDoesFileExist = 0\r\n\tend if\r\n\tSet fso = Nothing\r\nend function<\/pre>\n
Const Rsync = \"C:\\BackupPC\\rsyncd.pid\"\r\nConst Flag = \"C:\\BackupPC\\wake.up\"\r\n'\r\n' Just sleep until the file \"rsyncd.pid\" appears\r\n'\r\nWhile DoesFileExist(Rsync)\r\n wscript.sleep 10000\r\nWend\r\n'\r\n' Now sleep until the file \"wake.up\" appears\r\n'\r\nWhile DoesFileExist(Flag)\r\n wscript.sleep 10000\r\nWend\r\n'\r\nSet fso = CreateObject(\"Scripting.FileSystemObject\")\r\nSet aFile = fso.GetFile(Flag)\r\naFile.Delete\r\n'\r\n' It's time to kill Rsync\r\n'\r\nSet fso = CreateObject(\"Scripting.FileSystemObject\")\r\nSet aReadFile = fso.OpenTextFile(Rsync, 1)\r\nstrContents = aReadFile.ReadLine\r\naReadFile.Close\r\n'\r\nSet objShell = CreateObject(\"WScript.Shell\")\r\nobjShell.Run \"taskkill \/f \/pid \" & strContents, 0, true\r\n'\r\n' Wait for Rsync to let go\r\n'\r\nwscript.sleep 5000\r\n'\r\n' Delete PID file\r\n'\r\nIf DoesFileExist(Rsync)=0 Then\r\n Set objShell = CreateObject(\"WScript.Shell\")\r\n objShell.Run \"cmd \/c del C:\\BackupPC\\rsyncd.pid\", 0, true\r\nEnd If\r\n'\r\n' functions\r\n'\r\nfunction DoesFileExist(FilePath)\r\nDim fso\r\n\tSet fso = CreateObject(\"Scripting.FileSystemObject\")\r\n\tif not fso.FileExists(FilePath) then\r\n\t\tDoesFileExist = -1\r\n\telse\r\n\t\tDoesFileExist = 0\r\n\tend if\r\n\tSet fso = Nothing\r\nend function<\/pre>\n
cd \\backuppc\r\nvshadow -script=vss-setvar.cmd -exec=vsrsync.cmd c:<\/pre>\n
REM @ECHO OFF\r\ncall vss-setvar.cmd\r\ncd \\BackupPC\r\nSET CWRSYNCHOME=\\BACKUPPC\r\nSET CYGWIN=nontsec\r\nSET CWOLDPATH=%PATH%\r\nSET PATH=\\BACKUPPC;%PATH%\r\ndosdev B: %SHADOW_DEVICE_1%\r\nREM Go into daemon mode, we'll kill it once we're done\r\nrsync -v -v --daemon --config=rsyncd.conf --no-detach --log-file=diagnostic.txt\r\ndosdev -r -d B:<\/pre>\n
use chroot = false\r\nstrict modes = false\r\npid file = rsyncd.pid\r\n[C]\r\npath = \/cygdrive\/B\/\r\nauth users = Administrator\r\nsecrets file = rsyncd.secrets<\/pre>\n
#!\/bin\/bash\r\nWINEXE=\/usr\/bin\/winexe\r\nUNAME=\"Administrator\"\r\nPWD=\"admin.password\"\r\nWRKGRP=\"WORKGROUP\"\r\nBOX=$1\r\nPID=$($WINEXE -U $UNAME -W $WRKGRP --password=$PWD \/\/$BOX 'cmd \/c echo '1' > c:\\backuppc\\wake.up')\r\necho \"Rsync and shadow copy unloaded\"<\/pre>\n","protected":false},"excerpt":{"rendered":"