skruebackup is no longer in use

[backup.sh] / backup.sh

diff --git a/backup.sh b/backup.sh
index f4ae98bb0ab7dde18f3aee1df337786472ed50ae..cfac60723c6084aa1fdff420c4a86b1028225051 100755 (executable)
--- a/backup.sh
+++ b/backup.sh
@@ -90,7 +90,7 @@ backup()
                # If incremental backup, we need to copy the incremental status to $computer.
                # If it does not exist, whine a bit and then run date-based instead.
                if [ -s "$localsnar" ]; then
-                       if ! scp $localsnar $username@$computer:$remotesnar; then
+                       if ! scp $localsnar $username@$computer:$remotesnar >&2; then
                                diemsg "Could not copy .incremental.snar to $computer"
                        fi
                        lastcmd="--listed-incremental=$remotesnar --no-check-device"
@@ -107,6 +107,16 @@ backup()
                lastcmd="--listed-incremental=$remotesnar"
        fi
 
+       # The file is usually stored to disk with a simple cat > $TARFILE,
+       # but in some cases, like backing up to a remote and untrusted
+       # file system, it could be useful to replace it with e.g.
+       # a GPG command line.
+       if [ -f $confdir/storageprogram.$computer ]; then
+               storageprogram=`cat $confdir/storageprogram.$computer`
+       else
+               storageprogram=cat
+       fi
+
        # We try to run tar on the remote computer
        #    c create archive
        #    C change to directory first
@@ -118,8 +128,8 @@ backup()
        #    Pipe the stuff over ssh to ourselves, run pee to cat the contents to a
        #    file and build a file list, respectivly.  
        TARFILE=$DATE.tmp
-       TARCMD="ssh $username@$computer \"nice -n 19 ionice -c3 tar --one-file-system --use-compress-program $compressor -cf - -C $filesystem . $lastcmd \
-               --exclude-from=$remotehome/.backup/exclude\" | pee \"cat > $TARFILE\" \"tar tzvf -\""
+       TARCMD="ssh -n $username@$computer \"nice -n 19 ionice -c3 tar --one-file-system --use-compress-program $compressor -cf - -C $filesystem . $lastcmd \
+               --exclude-from=$remotehome/.backup/exclude\" | pee \"$storageprogram > $TARFILE\" \"tar tzvf -\""
        infomsg "Running $TARCMD"
        eval $TARCMD > $DATE.idx
 
@@ -127,7 +137,7 @@ backup()
                # File is >0 in size and neither cat or tar tzvf failed; we assume it worked.
  
                if [ "$remotesnar" ]; then
-                       if ! scp $username@$computer:$remotesnar $localsnar.tmp; then
+                       if ! scp $username@$computer:$remotesnar $localsnar.tmp >&2; then
                                diemsg "Could not copy .incremental.snar from $computer"
                        fi
                fi
@@ -146,7 +156,7 @@ backup()
                chmod 644 *idx 2>/dev/null          #everyone can read
 
                # Let the remote computer know that we ran a successful backup (for nagios)
-               ssh $username@$computer touch $filesystem/.lastbackup
+               ssh -n $username@$computer touch $filesystem/.lastbackup
        else
                # Something wrong happened.
                rm $TARFILE
@@ -161,6 +171,8 @@ backup()
 #  - No touching of .lastbackup for Nagios.
 #  - Failed tar operations may go undetected, since we only see the error code
 #    the last process in the pipe chain, which is gpg.
+#  - No storageprogram support (see above), because the file is typically already
+#    encrypted.
 nonprivbackup()
 {
        infomsg "$computer:$filesystem $backuplevel non-privileged backup"
@@ -173,7 +185,7 @@ nonprivbackup()
        fi
 
        TARFILE=$DATE.tmp
-       TARCMD="ssh $username@$computer \"sudo /usr/local/sbin/output-encrypted-backup $filesystem $lastcmd\""
+       TARCMD="ssh -n $username@$computer \"sudo /usr/local/sbin/output-encrypted-backup $filesystem $lastcmd\""
        infomsg "Running $TARCMD"
        eval $TARCMD > $TARFILE
 
@@ -221,7 +233,7 @@ if ! ssh -n -o NumberOfPasswordPrompts=0 $username@$computer /bin/true; then
 fi
 
 # Find the home directory of the backup user
-remotehome=`ssh $username@$computer "echo ~"`
+remotehome=`ssh -n $username@$computer "echo ~"`
 if [ -z "$remotehome" ]; then
        diemsg "Could not expand ~ for user $username"
 fi
@@ -242,12 +254,12 @@ filesystems=`ssh -n $username@$computer "cat /etc/fstab" \
        | awk '{ if ( $(NF-1) != "0" ) print $2}' `
 
 # Clean up our dir at this client
-if ! ssh $username@$computer "rm -r $remotehome/.backup ; mkdir -m 700 $remotehome/.backup"; then
+if ! ssh -n $username@$computer "rm -r $remotehome/.backup ; mkdir -m 700 $remotehome/.backup"; then
        diemsg "Could not create backup staging area at $computer:$remotehome/.backup"
 fi
 
 # Try to copy $exclude to $computer
-if ! scp $exclude $username@$computer:$remotehome/.backup/exclude > /dev/null; then
+if ! scp $exclude $username@$computer:$remotehome/.backup/exclude >&2; then
        diemsg "Could not copy exclude.txt to $computer"
 fi
 
@@ -264,7 +276,7 @@ if [ -f $confdir/postexec.$computer ]; then
 fi
 
 # Try to run preexec if it exists
-if ! ssh $username@$computer "[ ! -f $remotehome/.backup/preexec ] || /bin/bash -x $remotehome/.backup/preexec" >&2; then
+if ! ssh -n $username@$computer "[ ! -f $remotehome/.backup/preexec ] || /bin/bash -x $remotehome/.backup/preexec" >&2; then
        diemsg "Could not run $computer:$remotehome/.backup/preexec"
 fi
 
@@ -340,7 +352,7 @@ for filesystem in $filesystems; do
 done
 
 # Try to run postexec if it exist
-if ! ssh $username@$computer "[ ! -f $remotehome/.backup/postexec ] || /bin/bash -x $remotehome/.backup/postexec" >&2; then
+if ! ssh -n $username@$computer "[ ! -f $remotehome/.backup/postexec ] || /bin/bash -x $remotehome/.backup/postexec" >&2; then
        diemsg "Could not run $computer:$remotehome/.backup/postexec"
 fi