contrib/tzdata/checklinks.awk

   1 # Check links in tz tables.
   2
   3 # Contributed by Paul Eggert.  This file is in the public domain.
   4
   5 BEGIN {
   6     # Special marker indicating that the name is defined as a Zone.
   7     # It is a newline so that it cannot match a valid name.
   8     # It is not null so that its slot does not appear unset.
   9     Zone = "\n"
  10 }
  11
  12 /^Zone/ {
  13     if (defined[$2]) {
  14         if (defined[$2] == Zone) {
  15             printf "%s: Zone has duplicate definition\n", $2
  16         } else {
  17             printf "%s: Link with same name as Zone\n", $2
  18         }
  19         status = 1
  20     }
  21     defined[$2] = Zone
  22 }
  23
  24 /^Link/ {
  25     if (defined[$3]) {
  26         if (defined[$3] == Zone) {
  27             printf "%s: Link with same name as Zone\n", $3
  28         } else if (defined[$3] == $2) {
  29             printf "%s: Link has duplicate definition\n", $3
  30         } else {
  31             printf "%s: Link to both %s and %s\n", $3, defined[$3], $2
  32         }
  33         status = 1
  34     }
  35     used[$2] = 1
  36     defined[$3] = $2
  37 }
  38
  39 END {
  40     for (tz in used) {
  41         if (defined[tz] != Zone) {
  42             printf "%s: Link to non-zone\n", tz
  43             status = 1
  44         }
  45     }
  46
  47     exit status
  48 }