citadel/guesstimezone.sh

   1 #!/bin/sh
   2
   3 # guesstimezone.sh - an ugly hack of a script to try to guess the time
   4 # zone currently in use on the host system, and output its name.
   5
   6 # Copyright (c) by Art Cancro
   7
   8 # This program is free software; you can redistribute it and/or modify it
   9 # under the terms of the GNU General Public License as published by the Free
  10 # Software Foundation; either version 3 of the License, or (at your option)
  11 # any later version.
  12
  13 # This program is distributed in the hope that it will be useful, but WITHOUT
  14 # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  15 # FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
  16 # more details.
  17
  18 # You should have received a copy of the GNU General Public License along
  19 # with this program; if not, write to the Free Software Foundation, Inc.,
  20 # 675 Mass Ave, Cambridge, MA 02139, USA.
  21
  22 convert_timezone()
  23 {
  24     case "$1" in
  25         (right/*|posix/*)
  26             convert_timezone "${1#*/}"
  27             ;;
  28         ("Africa/Asmera")
  29             echo "Africa/Asmara"
  30             ;;
  31         ("America/Argentina/ComodRivadavia"|"America/Catamarca")
  32             echo "America/Argentina/Catamarca"
  33             ;;
  34         ("America/Buenos_Aires")
  35             echo "America/Argentina/Buenos_Aires"
  36             ;;
  37         ("America/Cordoba"|"America/Rosario")
  38             echo "America/Argentina/Cordoba"
  39             ;;
  40         ("America/Jujuy")
  41             echo "America/Argentina/Jujuy"
  42             ;;
  43         ("America/Mendoza")
  44             echo "America/Argentina/Mendoza"
  45             ;;
  46         ("Antarctica/South_Pole")
  47             echo "Antarctica/McMurdo"
  48             ;;
  49         "Asia/Ashkhabad")
  50             echo "Asia/Ashgabat"
  51             ;;
  52         ("Asia/Calcutta")
  53             echo "Asia/Kolkata"
  54             ;;
  55         "Asia/Chungking")
  56             echo "Asia/Chongqing"
  57             ;;
  58         "Asia/Dacca")
  59             echo "Asia/Dhaka"
  60             ;;
  61         ("Asia/Katmandu")
  62             echo "Asia/Kathmandu"
  63             ;;
  64         "Asia/Macao")
  65             echo "Asia/Macau"
  66             ;;
  67         ("Asia/Saigon")
  68             echo "Asia/Ho_Chi_Minh"
  69             ;;
  70         "Asia/Thimbu")
  71             echo "Asia/Thimphu"
  72             ;;
  73         "Asia/Ulan_Bator")
  74             echo "Asia/Ulaanbaatar"
  75             ;;
  76         "Atlantic/Faeroe")
  77             echo "Atlantic/Faroe"
  78             ;;
  79         "Australia/ACT" | "Australia/NSW")
  80             echo "Australia/Sydney"
  81             ;;
  82         "Australia/LHI")
  83             echo "Australia/Lord_Howe"
  84             ;;
  85         "Australia/North")
  86             echo "Australia/Darwin"
  87             ;;
  88         "Australia/Queensland")
  89             echo "Australia/Brisbane"
  90             ;;
  91         "Australia/South")
  92             echo "Australia/Adelaide"
  93             ;;
  94         "Australia/Tasmania")
  95             echo "Australia/Hobart"
  96             ;;
  97         "Australia/Victoria")
  98             echo "Australia/Melbourne"
  99             ;;
 100         "Australia/West")
 101             echo "Australia/Perth"
 102             ;;
 103         "Brazil/Acre")
 104             echo "America/Rio_Branco"
 105             ;;
 106         "Brazil/DeNoronha")
 107             echo "America/Noronha"
 108             ;;
 109         "Brazil/East")
 110             echo "America/Sao_Paulo"
 111             ;;
 112         "Brazil/West")
 113             echo "America/Manaus"
 114             ;;
 115         "Canada/Atlantic")
 116             echo "America/Halifax"
 117             ;;
 118         "Canada/Central")
 119             echo "America/Winnipeg"
 120             ;;
 121         "Canada/East-Saskatchewan")
 122             echo "America/Regina"
 123             ;;
 124         "Canada/Eastern")
 125             echo "America/Toronto"
 126             ;;
 127         "Canada/Mountain")
 128             echo "America/Edmonton"
 129             ;;
 130         "Canada/Newfoundland")
 131             echo "America/St_Johns"
 132             ;;
 133         "Canada/Pacific")
 134             echo "America/Vancouver"
 135             ;;
 136         "Canada/Saskatchewan")
 137             echo "America/Regina"
 138             ;;
 139         "Canada/Yukon")
 140             echo "America/Whitehorse"
 141             ;;
 142         "CET")
 143             echo "Europe/Paris"
 144             ;;
 145         "Chile/Continental")
 146             echo "America/Santiago"
 147             ;;
 148         "Chile/EasterIsland")
 149             echo "Pacific/Easter"
 150             ;;
 151         "CST6CDT")
 152             echo "SystemV/CST6CDT"
 153             ;;
 154         "Cuba")
 155             echo "America/Havana"
 156             ;;
 157         "EET")
 158             echo "Europe/Helsinki"
 159             ;;
 160         "Egypt")
 161             echo "Africa/Cairo"
 162             ;;
 163         "Eire")
 164             echo "Europe/Dublin"
 165             ;;
 166         "EST")
 167             echo "SystemV/EST5"
 168             ;;
 169         "EST5EDT")
 170             echo "SystemV/EST5EDT"
 171             ;;
 172         "GB")
 173             echo "Europe/London"
 174             ;;
 175         "GB-Eire")
 176             echo "Europe/London"
 177             ;;
 178         "GMT")
 179             echo "Etc/GMT"
 180             ;;
 181         "GMT0")
 182             echo "Etc/GMT0"
 183             ;;
 184         "GMT-0")
 185             echo "Etc/GMT-0"
 186             ;;
 187         "GMT+0")
 188             echo "Etc/GMT+0"
 189             ;;
 190         "Greenwich")
 191             echo "Etc/Greenwich"
 192             ;;
 193         "Hongkong")
 194             echo "Asia/Hong_Kong"
 195             ;;
 196         "HST")
 197             echo "Pacific/Honolulu"
 198             ;;
 199         "Iceland")
 200             echo "Atlantic/Reykjavik"
 201             ;;
 202         "Iran")
 203             echo "Asia/Tehran"
 204             ;;
 205         "Israel")
 206             echo "Asia/Tel_Aviv"
 207             ;;
 208         "Jamaica")
 209             echo "America/Jamaica"
 210             ;;
 211         "Japan")
 212             echo "Asia/Tokyo"
 213             ;;
 214         "Kwajalein")
 215             echo "Pacific/Kwajalein"
 216             ;;
 217         "Libya")
 218             echo "Africa/Tripoli"
 219             ;;
 220         "MET")
 221             echo "Europe/Paris"
 222             ;;
 223         "Mexico/BajaNorte")
 224             echo "America/Tijuana"
 225             ;;
 226         "Mexico/BajaSur")
 227             echo "America/Mazatlan"
 228             ;;
 229         "Mexico/General")
 230             echo "America/Mexico_City"
 231             ;;
 232         "Mideast/Riyadh87")
 233             echo "Asia/Riyadh87"
 234             ;;
 235         "Mideast/Riyadh88")
 236             echo "Asia/Riyadh88"
 237             ;;
 238         "Mideast/Riyadh89")
 239             echo "Asia/Riyadh89"
 240             ;;
 241         "MST")
 242             echo "SystemV/MST7"
 243             ;;
 244         "MST7MDT")
 245             echo "SystemV/MST7MDT"
 246             ;;
 247         "Navajo")
 248             echo "America/Denver"
 249             ;;
 250         "NZ")
 251             echo "Pacific/Auckland"
 252             ;;
 253         "NZ-CHAT")
 254             echo "Pacific/Chatham"
 255             ;;
 256         "Poland")
 257             echo "Europe/Warsaw"
 258             ;;
 259         "Portugal")
 260             echo "Europe/Lisbon"
 261             ;;
 262         "PRC")
 263             echo "Asia/Shanghai"
 264             ;;
 265         "PST8PDT")
 266             echo "SystemV/PST8PDT"
 267             ;;
 268         "ROC")
 269             echo "Asia/Taipei"
 270             ;;
 271         "ROK")
 272             echo "Asia/Seoul"
 273             ;;
 274         "Singapore")
 275             echo "Asia/Singapore"
 276             ;;
 277         "Turkey")
 278             echo "Europe/Istanbul"
 279             ;;
 280         "UCT")
 281             echo "Etc/UCT"
 282             ;;
 283         "Universal")
 284             echo "Etc/UTC"
 285             ;;
 286         "US/Alaska")
 287             echo "America/Anchorage"
 288             ;;
 289         "US/Aleutian")
 290             echo "America/Adak"
 291             ;;
 292         "US/Arizona")
 293             echo "America/Phoenix"
 294             ;;
 295         "US/Central")
 296             echo "America/Chicago"
 297             ;;
 298         "US/East-Indiana")
 299             echo "America/Indianapolis"
 300             ;;
 301         "US/Eastern")
 302             echo "America/New_York"
 303             ;;
 304         "US/Hawaii")
 305             echo "Pacific/Honolulu"
 306             ;;
 307         "US/Indiana-Starke")
 308             echo "America/Indianapolis"
 309             ;;
 310         "US/Michigan")
 311             echo "America/Detroit"
 312             ;;
 313         "US/Mountain")
 314             echo "America/Denver"
 315             ;;
 316         "US/Pacific")
 317             echo "America/Los_Angeles"
 318             ;;
 319         "US/Samoa")
 320             echo "Pacific/Pago_Pago"
 321             ;;
 322         "UTC")
 323             echo "Etc/UTC"
 324             ;;
 325         "WET")
 326             echo "Europe/Lisbon"
 327             ;;
 328         "W-SU")
 329             echo "Europe/Moscow"
 330             ;;
 331         "Zulu")
 332             echo "Etc/UTC"
 333             ;;
 334         *)
 335             echo "$1"
 336             ;;
 337     esac
 338 }
 339
 340 md5sum </dev/null >/dev/null 2>/dev/null || exit 1
 341
 342 # this check will find the timezone if /etc/localtime is a link to the right timezone file
 343 # or that file has been copied to /etc/localtime and not changed afterwards
 344 LOCALTIMESUM=`md5sum /etc/localtime | awk ' { print $1 } ' 2>/dev/null`
 345 find /usr/share/zoneinfo -type f -print | while read filename
 346 do
 347         THISTIMESUM=`md5sum $filename | awk ' { print $1 } '`
 348         if [ $LOCALTIMESUM = $THISTIMESUM ] ; then
 349                 echo $filename | cut -c21-
 350                 exit 0
 351         fi
 352 done 2>/dev/null
 353
 354 # seems we haven't found the timezone yet, let's see whether /etc/timezone has some info
 355
 356 if [ -e /etc/timezone ]; then
 357     TIMEZONE="$(head -n 1 /etc/timezone)"
 358     TIMEZONE="${TIMEZONE%% *}"
 359     TIMEZONE="${TIMEZONE##/}"
 360     TIMEZONE="${TIMEZONE%%/}"
 361     TIMEZONE="$(convert_timezone $TIMEZONE)"
 362     if [ -f "/usr/share/zoneinfo/$TIMEZONE" ] ; then
 363         echo $TIMEZONE
 364         exit 0
 365     fi
 366 fi
 367
 368 exit 2