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# Check links in tz tables.
# Contributed by Paul Eggert. This file is in the public domain.
BEGIN {
# Special marker indicating that the name is defined as a Zone.
# It is a newline so that it cannot match a valid name.
# It is not null so that its slot does not appear unset.
Zone = "\n"
}
/^Z/ {
if (defined[$2]) {
if (defined[$2] == Zone) {
printf "%s: Zone has duplicate definition\n", $2
} else {
printf "%s: Link with same name as Zone\n", $2
}
status = 1
}
defined[$2] = Zone
}
/^L/ {
if (defined[$3]) {
if (defined[$3] == Zone) {
printf "%s: Link with same name as Zone\n", $3
} else if (defined[$3] == $2) {
printf "%s: Link has duplicate definition\n", $3
} else {
printf "%s: Link to both %s and %s\n", $3, defined[$3], $2
}
status = 1
}
used[$2] = 1
defined[$3] = $2
}
END {
for (tz in used) {
if (defined[tz] != Zone) {
printf "%s: Link to non-zone\n", tz
status = 1
}
}
exit status
}
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