--date and time functions module(..., package.seeall) require("posix") require("format") require("fs") --global for date formating see below for more information --Mon Nov 26 19:56:10 UTC 2007 looks like most systems use this --print(os.date(date.format)) formats = "%a %b %d %X %Z %Y" months ={ {"January","Jan"}, {"February", "Feb"}, {"March","Mar"}, {"April", "Apr"}, {"May","May"}, {"June","Jun"}, {"July","Jul"}, {"August","Aug"}, {"September","Sep"}, {"October","Oct"}, {"November","Nov"}, {"December","Dec"} } revmonths = {["january"] = 1, ["jan"] = 1, ["february"] = 2, ["feb"] = 2, ["march"] = 3, ["mar"] = 3, ["april"] = 4, ["apr"] = 4, ["may"] = 5, ["june"] = 6, ["jun"] = 6, ["july"] = 7, ["jul"] = 7, ["august"] = 8, ["aug"] = 8, ["september"] = 9, ["sep"] = 9, ["october"] = 10, ["oct"] = 10, ["november"] = 11, ["nov"] = 11, ["december"] = 12, ["dec"] = 12 } dow = { {"Sunday","Sun"}, {"Monday","Mon"}, {"Tuesday","Tue"}, {"Wednesday","Wed"}, {"Thursday","Thu"}, {"Friday","Fri"}, {"Saturday","Sat"} } revdow = { ["sunday"] = 1, ["sun"] = 2, ["monday"] = 2, ["mon"] = 2, ["tuesday"] = 3, ["tue"] = 3, ["wednesday"] = 4, ["wed"] = 4, ["thursday"] = 5, ["thu"] = 5, ["friday"] = 6, ["fri"] = 6, ["saturday"] = 7, ["sat"] =7 } -- + usually denotes right of PM and - means left. It seems that /etc/TZ needs these --reversed for alpine/busybox. difference in col 2 and 5 --this list is not full. May need some more added. No Africa or Asia --Abrr TZ,Real Offset, FullName, Location, What would be put in /etc/TZ(busybox needed offset) timezones = { {"A","+1","Alpha Time Zone","Military","Alpha-1"}, {"ACDT","+10:30","Australian Central Daylight Time","Australia","ACDT-10:30"}, {"ACST","+9:30","Australian Central Standard Time","Australia","ACST-9:30"}, {"ADT","-3","Atlantic Daylight Time","North America","ADT+3"}, {"AEDT","+11","Australian Eastern Daylight Time","Australia","AEDT-11"}, {"AEST","+10","Australian Eastern Standard Time","Australia","AEST-10"}, {"AKDT","-8","Alaska Daylight Time","North America","AKDT+8"}, {"AKST","-9","Alaska Standard Time","North America","AKST+9"}, {"AST","-4","Atlantic Standard Time","North America","AST+4"}, {"AWDT","+9","Australian Western Daylight Time","Australia","AWDT-9"}, {"AWST","+8","Australian Western Standard Time","Australia","AWST-8"}, {"B","+2","Bravo Time Zone","Military","Bravo-2"}, {"BST","+1","British Summer Time","Europe","BST-1"}, {"C","+3","Charlie Time Zone","Military","Charlie-3"}, {"CDT","-5","Central Daylight Time","North America","CDT+5"}, {"CEDT","+2","Central European Daylight Time","Europe","CEDT-2"}, {"CEST","+2","Central European Summer Time","Europe","CEST-2"}, {"CET","+1","Central European Time","Europe","CET-1"}, {"CST","+10:30","Central Summer(Daylight) Time","Australia","CST-10:30"}, {"CST","+9:30","Central Standard Time","Australia","CST-9:30"}, {"CST","-6","Central Standard Time","North America","CST+6"}, {"CXT","+7","Christmas Island Time","Australia","CXT-7"}, {"D","+4","Delta Time Zone","Military","Delta-4"}, {"E","+5","Echo Time Zone","Military","Echo-5"}, {"EDT","-4","Eastern Daylight Time","North America","EDT+4"}, {"EEDT","+3","Eastern European Daylight Time","Europe","EEDT-3"}, {"EEST","+3","Eastern European Summer Time","Europe","EEST-3"}, {"EET","+2","Eastern European Time","Europe","EET-2"}, {"EST","+11","Eastern Summer(Daylight) Time","Australia","EST-11"}, {"EST","+10","Eastern Standard Time","Australia","EST-10"}, {"EST","-5","Eastern Standard Time","North America","EST+5"}, {"F","+6","Foxtrot Time Zone","Military","Foxtrot-6"}, {"G","+7","Golf Time Zone","Military","Golf-7"}, {"GMT","+0","Greenwich Mean Time","Europe","GMT+0"}, {"H","+8","Hotel Time Zone","Military","Hotel-8"}, {"HAA","-3","Heure Avancée de l'Atlantique","North America","HAA+3"}, {"HAC","-5","Heure Avancée du Centre","North America","HAC+5"}, {"HADT","-9","Hawaii-Aleutian Daylight Time","North America","HADT+9"}, {"HAE","-4","Heure Avancée de l'Est","North America","HAE+4"}, {"HAP","-7","Heure Avancée du Pacifique","North America","HAP+7"}, {"HAR","-6","Heure Avancée des Rocheuses","North America","HAR+6"}, {"HAST","-10","Hawaii-Aleutian Standard Time","North America","HAST+10"}, {"HAT","-2:30","Heure Avancée de Terre-Neuve","North America","HAT+2:30"}, {"HAY","-8","Heure Avancée du Yukon","North America","HAY+8"}, {"HNA","-4","Heure Normale de l'Atlantique","North America","HNA+4"}, {"HNC","-6","Heure Normale du Centre","North America","HNC+6"}, {"HNE","-5","Heure Normale de l'Est","North America","HNE+5"}, {"HNP","-8","Heure Normale du Pacifique","North America","HNP+8"}, {"HNR","-7","Heure Normale des Rocheuses","North America","HNR+7"}, {"HNT","-3:30","Heure Normale de Terre-Neuve","North America","HNT+3:30"}, {"HNY","-9","Heure Normale du Yukon","North America","HNY+9"}, {"I","+9","India Time Zone","Military","India-9"}, {"IST","+1","Irish Summer Time","Europe","IST-1"}, {"K","+10","Kilo Time Zone","Military","Kilo-10"}, {"L","+11","Lima Time Zone","Military","Lima-11"}, {"M","+12","Mike Time Zone","Military","Mike-12"}, {"MDT","-6","Mountain Daylight Time","North America","MDT+6"}, {"MESZ","+2","Mitteleuroäische Sommerzeit","Europe","MESZ-2"}, {"MEZ","+1","Mitteleuropäische Zeit","Europe","MEZ-1"}, {"MST","-7","Mountain Standard Time","North America","MST+7"}, {"N","-1","November Time Zone","Military","November+1"}, {"NDT","-2:30","Newfoundland Daylight Time","North America","NDT+2:30"}, {"NFT","+11:30","Norfolk (Island) Time","Australia","NFT-11:30"}, {"NST","-3:30","Newfoundland Standard Time","North America","NST+3:30"}, {"O","-2","Oscar Time Zone","Military","Oscar+2"}, {"P","-3","Papa Time Zone","Military","Papa+3"}, {"PDT","-7","Pacific Daylight Time","North America","PDT+7"}, {"PST","-8","Pacific Standard Time","North America","PST+8"}, {"Q","-4","Quebec Time Zone","Military","Quebec+4"}, {"R","-5","Romeo Time Zone","Military","Romeo+5"}, {"S","-6","Sierra Time Zone","Military","Sierra+6"}, {"T","-7","Tango Time Zone","Military","Tango+7"}, {"U","-8","Uniform Time Zone","Military","Uniform+8"}, {"UTC","+0","Coordinated Universal Time","Europe","UTC+0"}, {"V","-9","Victor Time Zone","Military","Victor+9"}, {"W","-10","Whiskey Time Zone","Military","Whiskey+10"}, {"WEDT","+1","Western European Daylight Time","Europe","WEDT-1"}, {"WEST","+1","Western European Summer Time","Europe","WEST-1"}, {"WET","+0","Western European Time","Europe","WET+0"}, {"WST","+9","Western Summer(Daylight) Time","Australia","WST-9"}, {"WST","+8","Western Standard Time","Australia","WST-8"}, {"X","-11","X-ray Time Zone","Military","X-ray+11"}, {"Y","-12","Yankee Time Zone","Military","Yankee+12"}, {"Z","+0","Zulu Time Zone","Military","Zulu+0"} } --os.time() will give seconds since 1970-epoch --os.date() will give formated time strings --os.time{year=2007,month=1,day=1,hour=2,min=1,sec=1} --os.date(date.format,os.time()) --give me a table --t = { {year=2007,month=1,day=2,hour=2}, {year=2006,month=1,day=5} } --will return a table sorted by oldest <-> newest --to grab the largest and smallest a,b=g[1],g[table.maxn(g)] function date_to_seconds (t) g = {} count = table.maxn(t) for i = 1,count do g[#g+1] = os.time(t[i]) end table.sort(g) return g end -- the reverse of date_to_seconds. expecting a table of seconds --format can be changed. This seems to be standard, dow,mon,dom,time,zone,year -- seems like %z- +0000 time zone format and %Z- 3 letter timezone undocumented or new function seconds_to_date (t) g = {} count = table.maxn(t) for i = 1,count do g[#g+1] = os.date(formats,t[i]) end return g end --Wed Nov 28 14:01:23 UTC 2007 --os.date(date.formats) put into a table --year,month,day,hour,min,sec,isdst- may need a dst table to set this automatically function string_to_table (str) if str == nil then str = os.date(formats) end g = {} temp = format.string_to_table(str,"%s") month = abr_month_num(temp[2]) g["month"] = month day = temp[3] g["day"] = day --may do something with this if have a tz table ?? tz = temp[5] year = temp[6] g["year"] = year temp2 = format.string_to_table(temp[4],":") hour = temp2[1] g["hour"] = hour min = temp2[2] g["min"] = min sec = temp2[3] g["sec"] = sec return g end --give dates in seconds and gives the difference in years,months,days,... --gives a table back with hour,min,month,sec,day,year to display something like --you have 10 years, 14 hours, 10 days to renew you certificate -- in secs - year, day, hour,min,sec t_time = { field_names = {"years","days","hours","minutes","seconds"}, 31556926,86400,3600,60,1 } function date_diff (d1, d2) g = {} if d2 == nil then d2 = os.time() end --first sum of seconds sum = math.abs(os.difftime(d1,d2)) --going to go through and get it smaller with each pass through the table for a,b in ipairs(t_time) do print(sum) hold = math.modf(sum/b) g[t_time.field_names[a]] = hold sum = (sum - (hold*b)) end return g end --give a search number and return the month name function num_month_name (search) return months[search][1] end --give a search number and return the month abr function num_month_name_abr (search) return months[search][2] end function name_month_num (search) return revmonths[string.lower(search)] end function abr_month_num (search) return revmonths[string.lower(search)] end function num_dow_name (search) return dow[search][1] end function num_dow_name_abr (search) return dow[search][2] end function name_dow_num (search) return revdow[string.lower(search)] end function abr_dow_num (search) return revdow[string.lower(search)] end --tell me what TimeZone my system is set to function what_tz () f = fs.read_file_as_array("/etc/TZ") local tz = f[1] return tz end --change the timezone my system is set to function change_tz ( tz ) --give us something like CET-1, this is busy box offset need to fix. tz = string.gsub(tz, "%+", "%%+") tz = string.gsub(tz, "%-", "%%-") tz = "^" .. tz .. "$" result = {} for a=1,table.maxn(date.timezones) do c = string.match(date.timezones[a][5], tz) if c ~= nil then result[#result +1] = c end end if table.maxn(result) == 1 then fs.write_file("/etc/TZ", result[1]) mess = "Success" else mess = "Too many matches." end return mess,date.what_tz() end