X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ian/git?a=blobdiff_plain;ds=sidebyside;f=backup%2Fbackuplib.pl;h=8be8bff2cd91a889349377283ed119e6bde9884b;hb=470ba2e9de232758429e7656cfecb18edffabbfa;hp=ba1c50be01467958ded1c00873c1753870c5466a;hpb=17fb3a3831ca812a3ad384f4eec3b977432facd9;p=chiark-utils.git

diff --git a/backup/backuplib.pl b/backup/backuplib.pl
index ba1c50b..8be8bff 100644
--- a/backup/backuplib.pl
+++ b/backup/backuplib.pl
@@ -51,6 +51,25 @@ sub startprocess ($$$) {
     exec $c; die "$c: $!";
 }
 
+sub readtapeid_raw () {
+    open T, ">>TAPEID" or die $!; close T;
+    unlink 'TAPEID' or die $!;
+    system "mt -f $tape rewind"; $? and die $?;
+    system "mt -f $tape setblk $blocksizebytes"; $? and die $?;
+    system "dd if=$tape bs=${blocksize}b count=10 ".
+	   "| tar -b$blocksize -vvxf - TAPEID";
+}
+
+sub writetapeid ($) {
+    open T, ">TAPEID" or die $!;
+    print T "$_[0]\n" or die $!;
+    close T or die $!;
+
+    system "tar -b$blocksize -vvcf TAPEID.tar TAPEID"; $? and die $?;
+    system "dd if=TAPEID.tar of=$ntape bs=${blocksize}b count=10";
+    $? and die $?;
+}
+
 sub endprocesses () {
     while (keys %processes) {
 	$p= waitpid(-1,0) or die "wait: $!";