Revert "increase spam message size limit"

[hcoop/config/exim.git] / get-token

diff --git a/get-token b/get-token
dissimilarity index 63%
index 6754ade..d596bf4 100755 (executable)
--- a/get-token
+++ b/get-token
@@ -1,14 +1,86 @@
-#!/bin/bash
-# Get an AFS token for the given user.
-#
-# This is used to deliver mail with the appropriate credentials.
-
-USER=$1
-export KRB5CCNAME=FILE:/tmp/krb5cc_$USER.email
-kdestroy
-unlog
-KEYTAB=/etc/keytabs/mailfilter/$USER
-echo kinit -kt $KEYTAB $USER/mailfilter@HCOOP.NET > /tmp/exim-get-token-log
-kinit -kt $KEYTAB $USER/mailfilter@HCOOP.NET
-aklog
-
+#!/bin/bash
+# Get an AFS token for the given user.
+#
+# This is used to deliver mail with the appropriate credentials.
+#
+# Usage:
+#
+# get-token $USER
+# - If user is root, call this script as $USER
+#
+# get-token $USER norecurse
+# - Don't recursively call this script, even if user if root
+
+REALUSER=$(whoami)
+USER=$1
+LOGFILE=/var/local/mail-tokens/weird-error.log
+
+echo "`date` $REALUSER $USER (`groups`): $@" >> $LOGFILE
+#ps -eo euser,ruser,suser,fuser,comm,pid --ppid=$PPID --pid=$PPID --forest >> $LOGFILE
+
+if test "$REALUSER" = "root"; then
+    if test "$2" = "norecurse"; then
+        echo "Error: running as root even after trying to change to $USER" \
+            >> $LOGFILE
+        exit 1
+    fi
+
+    # Decide whether the user exists: getent returns 0 error code if so
+    getent passwd "$USER" >/dev/null
+    if test $? -ne 0; then
+        echo "$USER is not a local user, so ignoring them" \
+            >> $LOGFILE
+        exit 1
+    else
+        USER=$(getent passwd "$1" | cut -d':' -f 1)
+        exec sudo -u $USER -- $0 $1 norecurse
+    fi
+fi
+
+# Make sure USER exists, and resolve UIDs to a login name
+USER=$(getent passwd "$USER" | cut -d':' -f 1)
+LOGFILE=/var/local/mail-tokens/get-token-log.$USER
+
+if test -z "$USER"; then
+    echo "$USER is not a local user, so ignoring them" \
+        >> /var/local/mail-tokens/weird-error.log
+    exit 1
+fi
+
+# fuse stdin and stderr
+exec 2>&1
+
+# all future output goes to this file
+exec >& $LOGFILE
+
+# print name of user
+echo "Running as user $REALUSER"
+
+# debugging output
+if test "$2" = "debug"; then
+    shift; shift
+    echo "Debugging output: $*"
+fi
+
+date
+groups
+
+# set the credentials cache
+export KRB5CCNAME=FILE:/var/local/mail-tokens/krb5cc_$USER.email
+
+# eliminate any previous tokens
+#kdestroy
+#unlog
+KEYTAB=/etc/keytabs/user.daemon/$USER
+
+# display command-to-be-invoked as a sanity check
+set -x
+
+(
+flock -s 666
+krenew -vtH 30 || (kinit -V -kt $KEYTAB $USER/daemon@HCOOP.NET && aklog)
+
+# list tokens, for the sake of debugging
+tokens
+
+) 666>/var/local/mail-tokens/lock.$USER