X-Git-Url: https://git.hcoop.net/hcoop/zz_old/config/exim4-hopper.git/blobdiff_plain/5092a970110843b0e9484c70c0140879b4ba1431..7a6f2de49a8405850f507161d8ad380997dc8b55:/get-token

diff --git a/get-token b/get-token
dissimilarity index 74%
index 808820b..b7b5e02 100755
--- a/get-token
+++ b/get-token
@@ -1,26 +1,77 @@
-#!/bin/bash
-# Get an AFS token for the given user.
-#
-# This is used to deliver mail with the appropriate credentials.
-
-touch /tmp/get-token-was-called
-
-exec 2>&1
-exec  >&  /tmp/get-token-log
-
-echo ==============================================================================
-echo invoked: get-token $@
-echo userid:  `who am i`
-
-USER=$1
-export KRB5CCNAME=FILE:/tmp/krb5cc_$USER.email
-kdestroy
-unlog
-
-KEYTAB=/etc/keytabs/email/$USER.email.keytab
-echo kinit -kt $KEYTAB $USER/mailfilter@HCOOP.NET
-kinit -kt $KEYTAB $USER/mailfilter@HCOOP.NET
-aklog
-tokens
-echo ..............................................................................
-
+#!/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=$1
+LOGFILE=/tmp/exim4/weird-error.log
+
+if test "$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 su $USER -c "$0 $1 norecurse"
+    fi
+fi
+
+# Make sure USER exists, and resolve UIDs to a login name
+USER=$(getent passwd "$USER" | cut -d':' -f 1)
+LOGFILE=/tmp/exim4/get-token-log.$USER
+
+if test -z "$USER"; then
+    echo "$USER is not a local user, so ignoring them" \
+        >> /tmp/exim4/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: $*"
+fi
+
+# set the credentials cache
+export KRB5CCNAME=FILE:/tmp/exim4/krb5cc_$USER.email
+
+# eliminate any previous tokens
+kdestroy
+unlog
+KEYTAB=/etc/keytabs/user.daemon/$USER
+
+# display command-to-be-invoked as a sanity check
+echo kinit -kt $KEYTAB $USER/daemon@HCOOP.NET
+
+kinit -kt $KEYTAB $USER/daemon@HCOOP.NET
+aklog
+
+# list tokens, for the sake of debugging
+#tokens