I just released a little public domain utility I wrote to dump the raw values from zic-compiled binary files. This mainly aids anyone writing a zoneinfo reader who wants to easily view the binary structure and/or anyone creating contextual diffs from binary files. I'm posting it here in case anyone else finds it useful or wants to include it in tzcode.

-Andrew

Example output:

$ ./zid /usr/share/zoneinfo/Etc/GMT

32: tzh: magic 'TZif'

32: tzh: version 2

32: tzh: ttisgmtcnt 1

32: tzh: ttisstdcnt 1

32: tzh: leapcnt 0

32: tzh: timecnt 0

32: tzh: typecnt 1

32: tzh: charcnt 4

32: gmtoff 0 isdst 0 abbrind 0 (GMT)

32: ttisstdcnt[0]: 0

32: ttisgmtcnt[0]: 0

64: tzh: magic 'TZif'

64: tzh: version 2

64: tzh: ttisgmtcnt 1

64: tzh: ttisstdcnt 1

64: tzh: leapcnt 0

64: tzh: timecnt 0

64: tzh: typecnt 1

64: tzh: charcnt 4

64: offset 0 isdst 0 abbrind 0 (GMT)

64: ttisstdcnt[0]: 0

64: ttisgmtcnt[0]: 0

TZ: 'GMT0'