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Diffstat (limited to 'time/tzselect.ksh')
| -rw-r--r-- | time/tzselect.ksh | 289 |
1 files changed, 0 insertions, 289 deletions
diff --git a/time/tzselect.ksh b/time/tzselect.ksh deleted file mode 100644 index 031cda1..0000000 --- a/time/tzselect.ksh +++ /dev/null @@ -1,289 +0,0 @@ -#! @KSH@ -# Ask the user about the time zone, and output the resulting TZ value to stdout. -# Interact with the user via stderr and stdin. - -# Contributed by Paul Eggert <eggert@twinsun.com>. - -# Porting notes: -# -# This script requires several features of the Korn shell. -# If your host lacks the Korn shell, -# you can use either of the following free programs instead: -# -# Bourne-Again shell (bash) -# <URL:ftp://ftp.gnu.ai.mit.edu/pub/gnu/> -# -# Public domain ksh -# <URL:ftp://ftp.cs.mun.ca/pub/pdksh/pdksh.tar.gz> -# -# This script also uses several features of modern awk programs. -# If your host lacks awk, or has an old awk that does not conform to Posix.2, -# you can use either of the following free programs instead: -# -# GNU awk (gawk) -# <URL:ftp://ftp.gnu.ai.mit.edu/pub/gnu/> -# -# mawk -# <URL:ftp://ftp.whidbey.net/pub/brennan/> - - -# Specify default values for environment variables if they are unset. -: ${AWK=awk} -: ${TZDIR=@TZDIR@} - -# Check for awk Posix compliance. -($AWK -v x=y 'BEGIN { exit 123 }') </dev/null >/dev/null 2>&1 -[ $? = 123 ] || { - echo >&2 "$0: Sorry, your \`$AWK' program is not Posix compatible." - exit 1 -} - -# Make sure the tables are readable. -TZ_COUNTRY_TABLE=$TZDIR/iso3166.tab -TZ_ZONE_TABLE=$TZDIR/zone.tab -for f in $TZ_COUNTRY_TABLE $TZ_ZONE_TABLE -do - <$f || { - echo >&2 "$0: time zone files are not set up correctly" - exit 1 - } -done - -newline=' -' -IFS=$newline - - -# Work around a bug in bash 1.14.7 and earlier, where $PS3 is sent to stdout. -case $(echo 1 | (select x in x; do break; done) 2>/dev/null) in -?*) PS3= -esac - - -# Begin the main loop. We come back here if the user wants to retry. -while - - echo >&2 'Please identify a location' \ - 'so that time zone rules can be set correctly.' - - continent= - country= - region= - - - # Ask the user for continent or ocean. - - echo >&2 'Please select a continent or ocean.' - - select continent in \ - Africa \ - Americas \ - Antarctica \ - 'Arctic Ocean' \ - Asia \ - 'Atlantic Ocean' \ - Australia \ - Europe \ - 'Indian Ocean' \ - 'Pacific Ocean' \ - 'none - I want to specify the time zone using the Posix TZ format.' - do - case $continent in - '') - echo >&2 'Please enter a number in range.';; - ?*) - case $continent in - Americas) continent=America;; - *' '*) continent=$(expr "$continent" : '\([^ ]*\)') - esac - break - esac - done - case $continent in - '') - exit 1;; - none) - # Ask the user for a Posix TZ string. Check that it conforms. - while - echo >&2 'Please enter the desired value' \ - 'of the TZ environment variable.' - echo >&2 'For example, GST-10 is a zone named GST' \ - 'that is 10 hours ahead (east) of UTC.' - read TZ - $AWK -v TZ="$TZ" 'BEGIN { - tzname = "[^-+,0-9][^-+,0-9][^-+,0-9]+" - time = "[0-2]?[0-9](:[0-5][0-9](:[0-5][0-9])?)?" - offset = "[-+]?" time - date = "(J?[0-9]+|M[0-9]+\.[0-9]+\.[0-9]+)" - datetime = "," date "(/" time ")?" - tzpattern = "^(:.*|" tzname offset "(" tzname \ - "(" offset ")?(" datetime datetime ")?)?)$" - if (TZ ~ tzpattern) exit 1 - exit 0 - }' - do - echo >&2 "\`$TZ' is not a conforming" \ - 'Posix time zone string.' - done - TZ_for_date=$TZ;; - *) - # Get list of names of countries in the continent or ocean. - countries=$($AWK -F'\t' \ - -v continent="$continent" \ - -v TZ_COUNTRY_TABLE="$TZ_COUNTRY_TABLE" \ - ' - /^#/ { next } - $3 ~ ("^" continent "/") { - if (!cc_seen[$1]++) cc_list[++ccs] = $1 - } - END { - while (getline <TZ_COUNTRY_TABLE) { - if ($0 !~ /^#/) cc_name[$1] = $2 - } - for (i = 1; i <= ccs; i++) { - country = cc_list[i] - if (cc_name[country]) { - country = cc_name[country] - } - print country - } - } - ' <$TZ_ZONE_TABLE | sort -f) - - - # If there's more than one country, ask the user which one. - case $countries in - *"$newline"*) - echo >&2 'Please select a country.' - select country in $countries - do - case $country in - '') echo >&2 'Please enter a number in range.';; - ?*) break - esac - done - - case $country in - '') exit 1 - esac;; - *) - country=$countries - esac - - - # Get list of names of time zone rule regions in the country. - regions=$($AWK -F'\t' \ - -v country="$country" \ - -v TZ_COUNTRY_TABLE="$TZ_COUNTRY_TABLE" \ - ' - BEGIN { - cc = country - while (getline <TZ_COUNTRY_TABLE) { - if ($0 !~ /^#/ && country == $2) { - cc = $1 - break - } - } - } - $1 == cc { print $4 } - ' <$TZ_ZONE_TABLE) - - - # If there's more than one region, ask the user which one. - case $regions in - *"$newline"*) - echo >&2 'Please select one of the following' \ - 'time zone regions.' - select region in $regions - do - case $region in - '') echo >&2 'Please enter a number in range.';; - ?*) break - esac - done - case $region in - '') exit 1 - esac;; - *) - region=$regions - esac - - # Determine TZ from country and region. - TZ=$($AWK -F'\t' \ - -v country="$country" \ - -v region="$region" \ - -v TZ_COUNTRY_TABLE="$TZ_COUNTRY_TABLE" \ - ' - BEGIN { - cc = country - while (getline <TZ_COUNTRY_TABLE) { - if ($0 !~ /^#/ && country == $2) { - cc = $1 - break - } - } - } - $1 == cc && $4 == region { print $3 } - ' <$TZ_ZONE_TABLE) - - # Make sure the corresponding zoneinfo file exists. - TZ_for_date=$TZDIR/$TZ - <$TZ_for_date || { - echo >&2 "$0: time zone files are not set up correctly" - exit 1 - } - esac - - - # Use the proposed TZ to output the current date relative to UTC. - # Loop until they agree in seconds. - # Give up after 8 unsuccessful tries. - - extra_info= - for i in 1 2 3 4 5 6 7 8 - do - TZdate=$(LANG=C TZ="$TZ_for_date" date) - UTdate=$(LANG=C TZ=UTC0 date) - TZsec=$(expr "$TZdate" : '.*:\([0-5][0-9]\)') - UTsec=$(expr "$UTdate" : '.*:\([0-5][0-9]\)') - case $TZsec in - $UTsec) - extra_info=" -Local time is now: $TZdate. -Universal Time is now: $UTdate." - break - esac - done - - - # Output TZ info and ask the user to confirm. - - echo >&2 "" - echo >&2 "The following information has been given:" - echo >&2 "" - case $country+$region in - ?*+?*) echo >&2 " $country$newline $region";; - ?*+) echo >&2 " $country";; - +) echo >&2 " TZ='$TZ'" - esac - echo >&2 "" - echo >&2 "Therefore TZ='$TZ' will be used.$extra_info" - echo >&2 "Is the above information OK?" - - ok= - select ok in Yes No - do - case $ok in - '') echo >&2 'Please enter 1 for Yes, or 2 for No.';; - ?*) break - esac - done - case $ok in - '') exit 1;; - Yes) break - esac -do : -done - -# Output the answer. -echo "$TZ" |