detect Releasefile IMS hits even if the server doesn't

[apt.git] / debian / apt.cron.daily

diff --git a/debian/apt.cron.daily b/debian/apt.cron.daily
index 69f97a36b9bd81186b7c4ade8359a36820a224e0..ee0761bfbd7e1d9ecd3bbd1fdb5fd1553e22abc2 100644 (file)
--- a/debian/apt.cron.daily
+++ b/debian/apt.cron.daily
@@ -8,7 +8,7 @@
 #  Dir "/";
 #  - RootDir for all configuration files
 #
-#  Dir::Cache "var/apt/cache/";
+#  Dir::Cache "var/cache/apt/";
 #  - Set apt package cache directory
 #
 #  Dir::Cache::Archives "archives/";
@@ -34,14 +34,14 @@
 #  APT::Archives::MinAge "2"; (old, deprecated)
 #  APT::Periodic::MinAge "2"; (new)
 #  - Set minimum age of a package file. If a file is younger it
-#    will not be deleted (0=disable). Usefull to prevent races 
+#    will not be deleted (0=disable). Useful to prevent races
 #    and to keep backups of the packages for emergency.
 #
 #  APT::Archives::MaxSize "0"; (old, deprecated)
 #  APT::Periodic::MaxSize "0"; (new)
 #  - Set maximum size of the cache in MB (0=disable). If the cache
 #    is bigger, cached package files are deleted until the size
-#    requirement is met (the biggest packages will be deleted 
+#    requirement is met (the oldest packages will be deleted 
 #    first).
 #
 #  APT::Periodic::Update-Package-Lists "0";
@@ -91,7 +91,7 @@ check_stamp()
     stamp=$(date --date=$(date -r $stamp_file --iso-8601) +%s 2>/dev/null)
     if [ "$?" != "0" ]; then
         # Due to some timezones returning 'invalid date' for midnight on
-        # certain dates (eg America/Sao_Paulo), if date returns with error
+        # certain dates (e.g. America/Sao_Paulo), if date returns with error
         # remove the stamp file and return 0. See coreutils bug:
         # http://lists.gnu.org/archive/html/bug-coreutils/2007-09/msg00176.html
         rm -f "$stamp_file"
@@ -101,14 +101,14 @@ check_stamp()
     now=$(date --date=$(date --iso-8601) +%s 2>/dev/null)
     if [ "$?" != "0" ]; then
         # As above, due to some timezones returning 'invalid date' for midnight
-        # on certain dates (eg America/Sao_Paulo), if date returns with error
+        # on certain dates (e.g. America/Sao_Paulo), if date returns with error
         # return 0.
         return 0
     fi
 
     delta=$(($now-$stamp))
 
-    # intervall is in days, convert to sec.
+    # interval is in days, convert to sec.
     interval=$(($interval*60*60*24))
     debug_echo "check_stamp: interval=$interval, now=$now, stamp=$stamp, delta=$delta (sec)"
 
@@ -197,11 +197,11 @@ check_size_constraints()
                    delta=$(($now-$ctime))
                fi
                if [ $delta -le $MinAge ]; then
-                   debug_echo "skip remove by archive size:  $file, delta=$delta < $MinAgeSec"
+                   debug_echo "skip remove by archive size:  $file, delta=$delta < $MinAge"
                    break
                else
                    # delete oldest file
-                   debug_echo "remove by archive size: $file, delta=$delta >= $MinAgeSec (sec), size=$size >= $MaxSize"
+                   debug_echo "remove by archive size: $file, delta=$delta >= $MinAge (sec), size=$size >= $MaxSize"
                    rm -f $file
                fi
            fi
@@ -289,7 +289,7 @@ random_sleep()
     fi
     if [ -z "$RANDOM" ] ; then
         # A fix for shells that do not have this bash feature.
-       RANDOM=$(dd if=/dev/urandom count=1 2> /dev/null | cksum | cut -c"1-5")
+       RANDOM=$(( $(dd if=/dev/urandom bs=2 count=1 2> /dev/null | cksum | cut -d' ' -f1) % 32767 ))
     fi
     TIME=$(($RANDOM % $RandomSleep))
     debug_echo "sleeping for $TIME seconds"
@@ -327,16 +327,18 @@ check_power(){
 
 # ------------------------ main ----------------------------
 
-# Backup the 7 last versions of APT's extended_states file
-# shameless copy from dpkg cron
-if cd /var/backups ; then
-    if ! cmp -s apt.extended_states.0 /var/lib/apt/extended_states; then
-       cp -p /var/lib/apt/extended_states apt.extended_states
-       savelog -c 7 apt.extended_states >/dev/null
+if test -r /var/lib/apt/extended_states; then
+    # Backup the 7 last versions of APT's extended_states file
+    # shameless copy from dpkg cron
+    if cd /var/backups ; then
+       if ! cmp -s apt.extended_states.0 /var/lib/apt/extended_states; then
+           cp -p /var/lib/apt/extended_states apt.extended_states
+           savelog -c 7 apt.extended_states >/dev/null
+       fi
     fi
 fi
 
-# check apt-config exstance
+# check apt-config existence
 if ! which apt-config >/dev/null ; then
        exit 0
 fi
@@ -373,7 +375,7 @@ fi
 check_power || exit 0
 
 # check if we can lock the cache and if the cache is clean
-if which apt-get >/dev/null && ! eval apt-get check -f $XAPTOPT $XSTDERR ; then
+if which apt-get >/dev/null && ! eval apt-get check $XAPTOPT $XSTDERR ; then
     debug_echo "error encountered in cron job with \"apt-get check\"."
     exit 0
 fi
@@ -382,7 +384,7 @@ fi
 now=$(date +%s)
 
 # Support old Archive for compatibility.
-# Document only Periodic for all controling parameters of this script.
+# Document only Periodic for all controlling parameters of this script.
 
 UpdateInterval=0
 eval $(apt-config shell UpdateInterval APT::Periodic::Update-Package-Lists)