It is possible to have no hosts database at all. Pointed out in

[metaconfig.git] / U / modified / myhostname.U

diff --git a/U/modified/myhostname.U b/U/modified/myhostname.U
index 64ea229..5a506c0 100644 (file)
--- a/U/modified/myhostname.U
+++ b/U/modified/myhostname.U
@@ -178,18 +178,23 @@ case "$myhostname" in
                                        /[       ]$myhostname[  . ]/p" > hosts
                }
                tmp_re="[       . ]"
-               $test x`$awk "/[0-9].*[  ]$myhostname$tmp_re/ { sum++ }
+               if $test -f hosts; then
+                       $test x`$awk "/[0-9].*[  ]$myhostname$tmp_re/ { sum++ }
                             END { print sum }" hosts` = x1 || tmp_re="[         ]"
-               dflt=.`$awk "/[0-9].*[   ]$myhostname$tmp_re/ {for(i=2; i<=NF;i++) print \\\$i}" \
-                       hosts | $sort | $uniq | \
-                       $sed -n -e "s/$myhostname\.\([-a-zA-Z0-9_.]\)/\1/p"`
-               case `$echo X$dflt` in
-               X*\ *)  echo "(Several hosts in /etc/hosts matched hostname)"
+                       dflt=.`$awk "/[0-9].*[   ]$myhostname$tmp_re/ {for(i=2; i<=NF;i++) print \\\$i}" \
+                               hosts | $sort | $uniq | \
+                               $sed -n -e "s/$myhostname\.\([-a-zA-Z0-9_.]\)/\1/p"`
+                       case `$echo X$dflt` in
+                       X*\ *)  echo "(Several hosts in the database matched hostname)"
+                               dflt=.
+                               ;;
+                       X.) echo "(You do not have fully-qualified names in the hosts database)"
+                               ;;
+                       esac
+               else
+                       echo "(I cannot locate a hosts database anywhere)"
                        dflt=.
-                       ;;
-               X.) echo "(You do not have fully-qualified names in /etc/hosts)"
-                       ;;
-               esac
+               fi
                case "$dflt" in
                .)
                        tans=`./loc resolv.conf X /etc /usr/etc`