(tools/naptr-eduroam.sh): Use /bin/sh rather than bash.

Not all systems have bash (esp. not in /bin) and some people argue
that /bin/sh should be less unsafe due to less code, lower complexity
and being around for longer time.

Fixes:
- /bin/sh builtin echo doesn't have `-e' -- use /bin/echo
- /bin/sh builtin test ([) doesn't understand `==' -- use `='

diff --git a/tools/naptr-eduroam.sh b/tools/naptr-eduroam.sh
index 5f04704..99be5e1 100755 (executable)
--- a/tools/naptr-eduroam.sh
+++ b/tools/naptr-eduroam.sh
@@ -1,4 +1,4 @@
-#! /bin/bash
+#! /bin/sh
 
 # Example script!
 # This script looks up radsec srv records in DNS for the one
@@ -8,7 +8,7 @@
 # For host command this is coloumn 5, for dig it is coloumn 1.
 
 usage() {
-    echo "Usage: ${0} <realm>"
+    /bin/echo "Usage: ${0} <realm>"
     exit 1
 }
 
@@ -22,7 +22,7 @@ dig_it_srv() {
     ${DIGCMD} +short srv $SRV_HOST | sort -k1 |
     while read line ; do
        set $line ; PORT=$3 ; HOST=$4
-       echo -e "\thost ${HOST%.}:${PORT}"
+       /bin/echo -e "\thost ${HOST%.}:${PORT}"
     done
 }
 
@@ -30,7 +30,7 @@ dig_it_naptr() {
     ${DIGCMD} +short naptr ${REALM} | grep x-eduroam:radius.tls | sort -k1 |
     while read line ; do
        set $line ; TYPE=$3 ; HOST=$6
-       if [ "$TYPE" == "\"s\"" ]; then { 
+       if [ "$TYPE" = "\"s\"" ]; then { 
                SRV_HOST=${HOST%.}
                dig_it_srv; };
        fi
@@ -41,7 +41,7 @@ host_it_srv() {
     ${HOSTCMD} -t srv $SRV_HOST | sort -k5 | 
     while read line ; do
        set $line ; PORT=$7 ; HOST=$8 
-       echo -e "\thost ${HOST%.}:${PORT}"
+       /bin/echo -e "\thost ${HOST%.}:${PORT}"
     done
 }
 
@@ -49,7 +49,7 @@ host_it_naptr() {
     ${HOSTCMD} -t naptr ${REALM} | grep x-eduroam:radius.tls | sort -k5 | 
     while read line ; do
        set $line ; TYPE=$7 ; HOST=${10}
-       if [ "$TYPE" == "\"s\"" ]; then {
+       if [ "$TYPE" = "\"s\"" ]; then {
                SRV_HOST=${HOST%.}
                host_it_srv; }; fi
        
@@ -61,12 +61,12 @@ if test -x "${DIGCMD}" ; then
 elif test -x "${HOSTCMD}" ; then
     SERVERS=$(host_it_naptr)
 else
-    echo "${0} requires either \"dig\" or \"host\" command."
+    /bin/echo "${0} requires either \"dig\" or \"host\" command."
     exit 1
 fi
 
 if test -n "${SERVERS}" ; then
-    echo -e "server dynamic_radsec.${REALM} {\n${SERVERS}\n\ttype TLS\n}"
+    /bin/echo -e "server dynamic_radsec.${REALM} {\n${SERVERS}\n\ttype TLS\n}"
     exit 0
 fi