merge r1797 from lp:~donkult/apt/experimental

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

diff --git a/debian/apt.cron.daily b/debian/apt.cron.daily
index 34d6b164fafac04472e2260d035176dd03a5d477..5c5ca88c79e8d4fb31740638ae350dec203a240d 100644 (file)
--- a/debian/apt.cron.daily
+++ b/debian/apt.cron.daily
@@ -50,8 +50,25 @@ check_stamp()
     fi
 
     # compare midnight today to midnight the day the stamp was updated
     fi
 
     # compare midnight today to midnight the day the stamp was updated

-    stamp=$(date --date=$(date -r $stamp --iso-8601) +%s)
-    now=$(date --date=$(date --iso-8601) +%s)
+    stamp_file="$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
+        # remove the stamp file and return 0. See coreutils bug:
+        # http://lists.gnu.org/archive/html/bug-coreutils/2007-09/msg00176.html
+        rm -f "$stamp_file"
+        return 0
+    fi
+
+    now=$(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
+        # return 0.
+        return 0
+    fi
+

     delta=$(($now-$stamp))
 
     # intervall is in days,
     delta=$(($now-$stamp))
 
     # intervall is in days,


@@ -147,16 +164,44 @@ check_size_constraints()
     fi
 }
 
     fi
 }
 

+# sleep for a random interval of time (default 30min)
+# (some code taken from cron-apt, thanks)
+random_sleep()
+{
+    RandomSleep=1800
+    eval $(apt-config shell RandomSleep APT::Periodic::RandomSleep)
+    if [ $RandomSleep -eq 0 ]; then
+       return
+    fi
+    if [ -z "$RANDOM" ] ; then
+        # A fix for shells that do not have this bash feature.
+       RANDOM=$(dd if=/dev/urandom count=1 2> /dev/null | cksum | cut -c"1-5")
+    fi
+    TIME=$(($RANDOM % $RandomSleep))
+    sleep $TIME
+}
+
+# main
+
+if ! which apt-config >/dev/null; then
+       exit 0
+fi

 
 UpdateInterval=0
 DownloadUpgradeableInterval=0
 eval $(apt-config shell UpdateInterval APT::Periodic::Update-Package-Lists DownloadUpgradeableInterval APT::Periodic::Download-Upgradeable-Packages)
 AutocleanInterval=$DownloadUpgradeableInterval
 eval $(apt-config shell AutocleanInterval APT::Periodic::AutocleanInterval)
 
 UpdateInterval=0
 DownloadUpgradeableInterval=0
 eval $(apt-config shell UpdateInterval APT::Periodic::Update-Package-Lists DownloadUpgradeableInterval APT::Periodic::Download-Upgradeable-Packages)
 AutocleanInterval=$DownloadUpgradeableInterval
 eval $(apt-config shell AutocleanInterval APT::Periodic::AutocleanInterval)

-

 UnattendedUpgradeInterval=0
 eval $(apt-config shell UnattendedUpgradeInterval APT::Periodic::Unattended-Upgrade)
 
 UnattendedUpgradeInterval=0
 eval $(apt-config shell UnattendedUpgradeInterval APT::Periodic::Unattended-Upgrade)
 

+# check if we actually have to do anything
+if [ $UpdateInterval -eq 0 ] &&
+   [ $DownloadUpgradeableInterval -eq 0 ] &&
+   [ $UnattendedUpgradeInterval -eq 0 ] &&
+   [ $AutocleanInterval -eq 0 ]; then
+    exit 0
+fi

 
 # laptop check, on_ac_power returns:
 #       0 (true)    System is on mains power
 
 # laptop check, on_ac_power returns:
 #       0 (true)    System is on mains power


@@ -170,12 +215,28 @@ if which on_ac_power >/dev/null; then
     fi
 fi
 
     fi
 fi
 

+# sleep random amount of time to avoid hitting the 
+# mirrors at the same time
+random_sleep
+
+# check if we can access the cache
+if ! apt-get check -q -q 2>/dev/null; then
+    # wait random amount of time before retrying
+    random_sleep
+    # check again
+    if ! apt-get check -q -q 2>/dev/null; then
+       echo "$0: could not lock the APT cache while performing daily cron job. "
+       echo "Is another package manager working?"
+       exit 1
+    fi
+fi
+

 UPDATE_STAMP=/var/lib/apt/periodic/update-stamp
 if check_stamp $UPDATE_STAMP $UpdateInterval; then
     if apt-get -qq update 2>/dev/null; then
 UPDATE_STAMP=/var/lib/apt/periodic/update-stamp
 if check_stamp $UPDATE_STAMP $UpdateInterval; then
     if apt-get -qq update 2>/dev/null; then

-       if which dbus-send >/dev/null; then
-           dbus-send --system / app.apt.dbus.updated boolean:true
-       fi
+        if which dbus-send >/dev/null && pidof dbus-daemon >/dev/null; then
+            dbus-send --system / app.apt.dbus.updated boolean:true
+        fi

         update_stamp $UPDATE_STAMP
     fi
 fi
         update_stamp $UPDATE_STAMP
     fi
 fi