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|
if not modules then modules = { } end modules ['l-os'] = {
version = 1.001,
comment = "companion to luat-lib.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
-- This file deals with some operating system issues. Please don't bother me
-- with the pros and cons of operating systems as they all have their flaws
-- and benefits. Bashing one of them won't help solving problems and fixing
-- bugs faster and is a waste of time and energy.
--
-- path separators: / or \ ... we can use / everywhere
-- suffixes : dll so exe <none> ... no big deal
-- quotes : we can use "" in most cases
-- expansion : unless "" are used * might give side effects
-- piping/threads : somewhat different for each os
-- locations : specific user file locations and settings can change over time
--
-- os.type : windows | unix (new, we already guessed os.platform)
-- os.name : windows | msdos | linux | macosx | solaris | .. | generic (new)
-- os.platform : extended os.name with architecture
-- os.sleep() => socket.sleep()
-- math.randomseed(tonumber(string.sub(string.reverse(tostring(math.floor(socket.gettime()*10000))),1,6)))
-- maybe build io.flush in os.execute
local os = os
local date, time = os.date, os.time
local find, format, gsub, upper, gmatch = string.find, string.format, string.gsub, string.upper, string.gmatch
local concat = table.concat
local random, ceil, randomseed = math.random, math.ceil, math.randomseed
local rawget, rawset, type, getmetatable, setmetatable, tonumber, tostring = rawget, rawset, type, getmetatable, setmetatable, tonumber, tostring
-- The following code permits traversing the environment table, at least
-- in luatex. Internally all environment names are uppercase.
-- The randomseed in Lua is not that random, although this depends on the operating system as well
-- as the binary (Luatex is normally okay). But to be sure we set the seed anyway.
math.initialseed = tonumber(string.sub(string.reverse(tostring(ceil(socket and socket.gettime()*10000 or time()))),1,6))
randomseed(math.initialseed)
if not os.__getenv__ then
os.__getenv__ = os.getenv
os.__setenv__ = os.setenv
if os.env then
local osgetenv = os.getenv
local ossetenv = os.setenv
local osenv = os.env local _ = osenv.PATH -- initialize the table
function os.setenv(k,v)
if v == nil then
v = ""
end
local K = upper(k)
osenv[K] = v
if type(v) == "table" then
v = concat(v,";") -- path
end
ossetenv(K,v)
end
function os.getenv(k)
local K = upper(k)
local v = osenv[K] or osenv[k] or osgetenv(K) or osgetenv(k)
if v == "" then
return nil
else
return v
end
end
else
local ossetenv = os.setenv
local osgetenv = os.getenv
local osenv = { }
function os.setenv(k,v)
if v == nil then
v = ""
end
local K = upper(k)
osenv[K] = v
end
function os.getenv(k)
local K = upper(k)
local v = osenv[K] or osgetenv(K) or osgetenv(k)
if v == "" then
return nil
else
return v
end
end
local function __index(t,k)
return os.getenv(k)
end
local function __newindex(t,k,v)
os.setenv(k,v)
end
os.env = { }
setmetatable(os.env, { __index = __index, __newindex = __newindex } )
end
end
-- end of environment hack
local execute, spawn, exec, iopopen, ioflush = os.execute, os.spawn or os.execute, os.exec or os.execute, io.popen, io.flush
function os.execute(...) ioflush() return execute(...) end
function os.spawn (...) ioflush() return spawn (...) end
function os.exec (...) ioflush() return exec (...) end
function io.popen (...) ioflush() return iopopen(...) end
function os.resultof(command)
local handle = io.popen(command,"r")
return handle and handle:read("*all") or ""
end
if not io.fileseparator then
if find(os.getenv("PATH"),";") then
io.fileseparator, io.pathseparator, os.type = "\\", ";", os.type or "mswin"
else
io.fileseparator, io.pathseparator, os.type = "/" , ":", os.type or "unix"
end
end
os.type = os.type or (io.pathseparator == ";" and "windows") or "unix"
os.name = os.name or (os.type == "windows" and "mswin" ) or "linux"
if os.type == "windows" then
os.libsuffix, os.binsuffix, os.binsuffixes = 'dll', 'exe', { 'exe', 'cmd', 'bat' }
else
os.libsuffix, os.binsuffix, os.binsuffixes = 'so', '', { '' }
end
local launchers = {
windows = "start %s",
macosx = "open %s",
unix = "$BROWSER %s &> /dev/null &",
}
function os.launch(str)
os.execute(format(launchers[os.name] or launchers.unix,str))
end
if not os.times then -- ?
-- utime = user time
-- stime = system time
-- cutime = children user time
-- cstime = children system time
function os.times()
return {
utime = os.gettimeofday(), -- user
stime = 0, -- system
cutime = 0, -- children user
cstime = 0, -- children system
}
end
end
local gettimeofday = os.gettimeofday or os.clock
os.gettimeofday = gettimeofday
local startuptime = gettimeofday()
function os.runtime()
return gettimeofday() - startuptime
end
-- print(os.gettimeofday()-os.time())
-- os.sleep(1.234)
-- print (">>",os.runtime())
-- print(os.date("%H:%M:%S",os.gettimeofday()))
-- print(os.date("%H:%M:%S",os.time()))
-- no need for function anymore as we have more clever code and helpers now
-- this metatable trickery might as well disappear
os.resolvers = os.resolvers or { } -- will become private
local resolvers = os.resolvers
setmetatable(os, { __index = function(t,k)
local r = resolvers[k]
return r and r(t,k) or nil -- no memoize
end })
-- we can use HOSTTYPE on some platforms
local name, platform = os.name or "linux", os.getenv("MTX_PLATFORM") or ""
local function guess()
local architecture = os.resultof("uname -m") or ""
if architecture ~= "" then
return architecture
end
architecture = os.getenv("HOSTTYPE") or ""
if architecture ~= "" then
return architecture
end
return os.resultof("echo $HOSTTYPE") or ""
end
if platform ~= "" then
os.platform = platform
elseif os.type == "windows" then
-- we could set the variable directly, no function needed here
function os.resolvers.platform(t,k)
local platform, architecture = "", os.getenv("PROCESSOR_ARCHITECTURE") or ""
if find(architecture,"AMD64") then
platform = "mswin-64"
else
platform = "mswin"
end
os.setenv("MTX_PLATFORM",platform)
os.platform = platform
return platform
end
elseif name == "linux" then
function os.resolvers.platform(t,k)
-- we sometimes have HOSTTYPE set so let's check that first
local platform, architecture = "", os.getenv("HOSTTYPE") or os.resultof("uname -m") or ""
if find(architecture,"x86_64") then
platform = "linux-64"
elseif find(architecture,"ppc") then
platform = "linux-ppc"
else
platform = "linux"
end
os.setenv("MTX_PLATFORM",platform)
os.platform = platform
return platform
end
elseif name == "macosx" then
--[[
Identifying the architecture of OSX is quite a mess and this
is the best we can come up with. For some reason $HOSTTYPE is
a kind of pseudo environment variable, not known to the current
environment. And yes, uname cannot be trusted either, so there
is a change that you end up with a 32 bit run on a 64 bit system.
Also, some proper 64 bit intel macs are too cheap (low-end) and
therefore not permitted to run the 64 bit kernel.
]]--
function os.resolvers.platform(t,k)
-- local platform, architecture = "", os.getenv("HOSTTYPE") or ""
-- if architecture == "" then
-- architecture = os.resultof("echo $HOSTTYPE") or ""
-- end
local platform, architecture = "", os.resultof("echo $HOSTTYPE") or ""
if architecture == "" then
-- print("\nI have no clue what kind of OSX you're running so let's assume an 32 bit intel.\n")
platform = "osx-intel"
elseif find(architecture,"i386") then
platform = "osx-intel"
elseif find(architecture,"x86_64") then
platform = "osx-64"
else
platform = "osx-ppc"
end
os.setenv("MTX_PLATFORM",platform)
os.platform = platform
return platform
end
elseif name == "sunos" then
function os.resolvers.platform(t,k)
local platform, architecture = "", os.resultof("uname -m") or ""
if find(architecture,"sparc") then
platform = "solaris-sparc"
else -- if architecture == 'i86pc'
platform = "solaris-intel"
end
os.setenv("MTX_PLATFORM",platform)
os.platform = platform
return platform
end
elseif name == "freebsd" then
function os.resolvers.platform(t,k)
local platform, architecture = "", os.resultof("uname -m") or ""
if find(architecture,"amd64") then
platform = "freebsd-amd64"
else
platform = "freebsd"
end
os.setenv("MTX_PLATFORM",platform)
os.platform = platform
return platform
end
elseif name == "kfreebsd" then
function os.resolvers.platform(t,k)
-- we sometimes have HOSTTYPE set so let's check that first
local platform, architecture = "", os.getenv("HOSTTYPE") or os.resultof("uname -m") or ""
if find(architecture,"x86_64") then
platform = "kfreebsd-amd64"
else
platform = "kfreebsd-i386"
end
os.setenv("MTX_PLATFORM",platform)
os.platform = platform
return platform
end
else
-- platform = "linux"
-- os.setenv("MTX_PLATFORM",platform)
-- os.platform = platform
function os.resolvers.platform(t,k)
local platform = "linux"
os.setenv("MTX_PLATFORM",platform)
os.platform = platform
return platform
end
end
-- beware, we set the randomseed
-- from wikipedia: Version 4 UUIDs use a scheme relying only on random numbers. This algorithm sets the
-- version number as well as two reserved bits. All other bits are set using a random or pseudorandom
-- data source. Version 4 UUIDs have the form xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx with hexadecimal
-- digits x and hexadecimal digits 8, 9, A, or B for y. e.g. f47ac10b-58cc-4372-a567-0e02b2c3d479.
--
-- as we don't call this function too often there is not so much risk on repetition
local t = { 8, 9, "a", "b" }
function os.uuid()
return format("%04x%04x-4%03x-%s%03x-%04x-%04x%04x%04x",
random(0xFFFF),random(0xFFFF),
random(0x0FFF),
t[ceil(random(4))] or 8,random(0x0FFF),
random(0xFFFF),
random(0xFFFF),random(0xFFFF),random(0xFFFF)
)
end
local d
function os.timezone(delta)
d = d or tonumber(tonumber(date("%H")-date("!%H")))
if delta then
if d > 0 then
return format("+%02i:00",d)
else
return format("-%02i:00",-d)
end
else
return 1
end
end
local timeformat = format("%%s%s",os.timezone(true))
local dateformat = "!%Y-%m-%d %H:%M:%S"
function os.fulltime(t,default)
t = tonumber(t) or 0
if t > 0 then
-- valid time
elseif default then
return default
else
t = nil
end
return format(timeformat,date(dateformat,t))
end
local dateformat = "%Y-%m-%d %H:%M:%S"
function os.localtime(t,default)
t = tonumber(t) or 0
if t > 0 then
-- valid time
elseif default then
return default
else
t = nil
end
return date(dateformat,t)
end
function os.converttime(t,default)
local t = tonumber(t)
if t and t > 0 then
return date(dateformat,t)
else
return default or "-"
end
end
local memory = { }
local function which(filename)
local fullname = memory[filename]
if fullname == nil then
local suffix = file.suffix(filename)
local suffixes = suffix == "" and os.binsuffixes or { suffix }
for directory in gmatch(os.getenv("PATH"),"[^" .. io.pathseparator .."]+") do
local df = file.join(directory,filename)
for i=1,#suffixes do
local dfs = file.addsuffix(df,suffixes[i])
if io.exists(dfs) then
fullname = dfs
break
end
end
end
if not fullname then
fullname = false
end
memory[filename] = fullname
end
return fullname
end
os.which = which
os.where = which
function os.today()
return date("!*t") -- table with values
end
function os.now()
return date("!%Y-%m-%d %H:%M:%S") -- 2011-12-04 14:59:12
end
-- if not os.sleep and socket then
-- os.sleep = socket.sleep
-- end
if not os.sleep then
local socket = socket
function os.sleep(n)
if not socket then
-- so we delay ... if os.sleep is really needed then one should also
-- be sure that socket can be found
socket = require("socket")
end
socket.sleep(n)
end
end
-- print(os.which("inkscape.exe"))
-- print(os.which("inkscape"))
-- print(os.which("gs.exe"))
-- print(os.which("ps2pdf"))
|