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windowsAgent/dist/tcl8/8.4/platform-1.0.14.tm
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windowsAgent/dist/tcl8/8.4/platform-1.0.14.tm
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# -*- tcl -*-
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# ### ### ### ######### ######### #########
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## Overview
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# Heuristics to assemble a platform identifier from publicly available
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# information. The identifier describes the platform of the currently
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# running tcl shell. This is a mixture of the runtime environment and
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# of build-time properties of the executable itself.
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#
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# Examples:
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# <1> A tcl shell executing on a x86_64 processor, but having a
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# wordsize of 4 was compiled for the x86 environment, i.e. 32
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# bit, and loaded packages have to match that, and not the
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# actual cpu.
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#
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# <2> The hp/solaris 32/64 bit builds of the core cannot be
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# distinguished by looking at tcl_platform. As packages have to
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# match the 32/64 information we have to look in more places. In
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# this case we inspect the executable itself (magic numbers,
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# i.e. fileutil::magic::filetype).
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#
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# The basic information used comes out of the 'os' and 'machine'
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# entries of the 'tcl_platform' array. A number of general and
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# os/machine specific transformation are applied to get a canonical
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# result.
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#
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# General
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# Only the first element of 'os' is used - we don't care whether we
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# are on "Windows NT" or "Windows XP" or whatever.
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#
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# Machine specific
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# % arm* -> arm
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# % sun4* -> sparc
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# % intel -> ix86
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# % i*86* -> ix86
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# % Power* -> powerpc
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# % x86_64 + wordSize 4 => x86 code
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#
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# OS specific
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# % AIX are always powerpc machines
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# % HP-UX 9000/800 etc means parisc
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# % linux has to take glibc version into account
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# % sunos -> solaris, and keep version number
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#
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# NOTE: A platform like linux glibc 2.3, which can use glibc 2.2 stuff
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# has to provide all possible allowed platform identifiers when
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# searching search. Ditto a solaris 2.8 platform can use solaris 2.6
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# packages. Etc. This is handled by the other procedure, see below.
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# ### ### ### ######### ######### #########
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## Requirements
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namespace eval ::platform {}
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# ### ### ### ######### ######### #########
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## Implementation
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# -- platform::generic
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#
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# Assembles an identifier for the generic platform. It leaves out
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# details like kernel version, libc version, etc.
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proc ::platform::generic {} {
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global tcl_platform
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set plat [string tolower [lindex $tcl_platform(os) 0]]
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set cpu $tcl_platform(machine)
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switch -glob -- $cpu {
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sun4* {
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set cpu sparc
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}
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intel -
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i*86* {
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set cpu ix86
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}
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x86_64 {
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if {$tcl_platform(wordSize) == 4} {
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# See Example <1> at the top of this file.
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set cpu ix86
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}
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}
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"Power*" {
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set cpu powerpc
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}
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"arm*" {
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set cpu arm
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}
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ia64 {
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if {$tcl_platform(wordSize) == 4} {
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append cpu _32
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}
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}
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}
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switch -glob -- $plat {
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cygwin* {
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set plat cygwin
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}
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windows {
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if {$tcl_platform(platform) == "unix"} {
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set plat cygwin
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} else {
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set plat win32
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}
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if {$cpu eq "amd64"} {
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# Do not check wordSize, win32-x64 is an IL32P64 platform.
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set cpu x86_64
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}
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}
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sunos {
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set plat solaris
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if {[string match "ix86" $cpu]} {
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if {$tcl_platform(wordSize) == 8} {
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set cpu x86_64
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}
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} elseif {![string match "ia64*" $cpu]} {
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# sparc
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if {$tcl_platform(wordSize) == 8} {
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append cpu 64
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}
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}
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}
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darwin {
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set plat macosx
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# Correctly identify the cpu when running as a 64bit
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# process on a machine with a 32bit kernel
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if {$cpu eq "ix86"} {
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if {$tcl_platform(wordSize) == 8} {
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set cpu x86_64
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}
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}
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}
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aix {
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set cpu powerpc
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if {$tcl_platform(wordSize) == 8} {
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append cpu 64
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}
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}
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hp-ux {
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set plat hpux
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if {![string match "ia64*" $cpu]} {
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set cpu parisc
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if {$tcl_platform(wordSize) == 8} {
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append cpu 64
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}
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}
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}
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osf1 {
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set plat tru64
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}
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}
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return "${plat}-${cpu}"
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}
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# -- platform::identify
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#
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# Assembles an identifier for the exact platform, by extending the
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# generic identifier. I.e. it adds in details like kernel version,
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# libc version, etc., if they are relevant for the loading of
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# packages on the platform.
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proc ::platform::identify {} {
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global tcl_platform
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set id [generic]
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regexp {^([^-]+)-([^-]+)$} $id -> plat cpu
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switch -- $plat {
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solaris {
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regsub {^5} $tcl_platform(osVersion) 2 text
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append plat $text
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return "${plat}-${cpu}"
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}
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macosx {
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set major [lindex [split $tcl_platform(osVersion) .] 0]
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if {$major > 8} {
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incr major -4
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append plat 10.$major
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return "${plat}-${cpu}"
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}
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}
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linux {
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# Look for the libc*.so and determine its version
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# (libc5/6, libc6 further glibc 2.X)
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set v unknown
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# Determine in which directory to look. /lib, or /lib64.
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# For that we use the tcl_platform(wordSize).
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#
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# We could use the 'cpu' info, per the equivalence below,
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# that however would be restricted to intel. And this may
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# be a arm, mips, etc. system. The wordsize is more
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# fundamental.
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#
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# ix86 <=> (wordSize == 4) <=> 32 bit ==> /lib
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# x86_64 <=> (wordSize == 8) <=> 64 bit ==> /lib64
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#
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# Do not look into /lib64 even if present, if the cpu
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# doesn't fit.
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# TODO: Determine the prefixes (i386, x86_64, ...) for
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# other cpus. The path after the generic one is utterly
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# specific to intel right now. Ok, on Ubuntu, possibly
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# other Debian systems we may apparently be able to query
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# the necessary CPU code. If we can't we simply use the
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# hardwired fallback.
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switch -exact -- $tcl_platform(wordSize) {
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4 {
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lappend bases /lib
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if {[catch {
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exec dpkg-architecture -qDEB_HOST_MULTIARCH
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} res]} {
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lappend bases /lib/i386-linux-gnu
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} else {
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# dpkg-arch returns the full tripled, not just cpu.
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lappend bases /lib/$res
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}
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}
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8 {
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lappend bases /lib64
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if {[catch {
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exec dpkg-architecture -qDEB_HOST_MULTIARCH
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} res]} {
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lappend bases /lib/x86_64-linux-gnu
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} else {
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# dpkg-arch returns the full tripled, not just cpu.
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lappend bases /lib/$res
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}
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}
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default {
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return -code error "Bad wordSize $tcl_platform(wordSize), expected 4 or 8"
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}
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}
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foreach base $bases {
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if {[LibcVersion $base -> v]} break
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}
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append plat -$v
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return "${plat}-${cpu}"
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}
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}
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return $id
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}
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proc ::platform::LibcVersion {base _->_ vv} {
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upvar 1 $vv v
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set libclist [lsort [glob -nocomplain -directory $base libc*]]
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if {![llength $libclist]} { return 0 }
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set libc [lindex $libclist 0]
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# Try executing the library first. This should suceed
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# for a glibc library, and return the version
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# information.
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if {![catch {
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set vdata [lindex [split [exec $libc] \n] 0]
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}]} {
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regexp {version ([0-9]+(\.[0-9]+)*)} $vdata -> v
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foreach {major minor} [split $v .] break
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set v glibc${major}.${minor}
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return 1
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} else {
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# We had trouble executing the library. We are now
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# inspecting its name to determine the version
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# number. This code by Larry McVoy.
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if {[regexp -- {libc-([0-9]+)\.([0-9]+)} $libc -> major minor]} {
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set v glibc${major}.${minor}
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return 1
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}
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}
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return 0
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}
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# -- platform::patterns
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#
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# Given an exact platform identifier, i.e. _not_ the generic
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# identifier it assembles a list of exact platform identifier
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# describing platform which should be compatible with the
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# input.
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#
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# I.e. packages for all platforms in the result list should be
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# loadable on the specified platform.
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# << Should we add the generic identifier to the list as well ? In
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# general it is not compatible I believe. So better not. In many
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# cases the exact identifier is identical to the generic one
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# anyway.
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# >>
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proc ::platform::patterns {id} {
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set res [list $id]
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if {$id eq "tcl"} {return $res}
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switch -glob -- $id {
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solaris*-* {
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if {[regexp {solaris([^-]*)-(.*)} $id -> v cpu]} {
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if {$v eq ""} {return $id}
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foreach {major minor} [split $v .] break
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incr minor -1
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for {set j $minor} {$j >= 6} {incr j -1} {
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lappend res solaris${major}.${j}-${cpu}
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}
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}
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}
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linux*-* {
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if {[regexp {linux-glibc([^-]*)-(.*)} $id -> v cpu]} {
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foreach {major minor} [split $v .] break
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incr minor -1
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for {set j $minor} {$j >= 0} {incr j -1} {
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lappend res linux-glibc${major}.${j}-${cpu}
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}
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}
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}
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macosx-powerpc {
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lappend res macosx-universal
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}
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macosx-x86_64 {
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lappend res macosx-i386-x86_64
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}
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macosx-ix86 {
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lappend res macosx-universal macosx-i386-x86_64
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}
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macosx*-* {
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# 10.5+
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if {[regexp {macosx([^-]*)-(.*)} $id -> v cpu]} {
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switch -exact -- $cpu {
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ix86 {
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lappend alt i386-x86_64
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lappend alt universal
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}
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x86_64 { lappend alt i386-x86_64 }
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default { set alt {} }
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}
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if {$v ne ""} {
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foreach {major minor} [split $v .] break
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# Add 10.5 to 10.minor to patterns.
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set res {}
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for {set j $minor} {$j >= 5} {incr j -1} {
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lappend res macosx${major}.${j}-${cpu}
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foreach a $alt {
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lappend res macosx${major}.${j}-$a
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}
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}
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# Add unversioned patterns for 10.3/10.4 builds.
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lappend res macosx-${cpu}
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foreach a $alt {
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lappend res macosx-$a
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}
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} else {
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# No version, just do unversioned patterns.
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foreach a $alt {
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lappend res macosx-$a
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}
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}
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} else {
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# no v, no cpu ... nothing
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}
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}
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}
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lappend res tcl ; # Pure tcl packages are always compatible.
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return $res
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}
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# ### ### ### ######### ######### #########
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## Ready
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||||
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||||
package provide platform 1.0.14
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||||
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||||
# ### ### ### ######### ######### #########
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## Demo application
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if {[info exists argv0] && ($argv0 eq [info script])} {
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puts ====================================
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parray tcl_platform
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puts ====================================
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puts Generic\ identification:\ [::platform::generic]
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puts Exact\ identification:\ \ \ [::platform::identify]
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puts ====================================
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puts Search\ patterns:
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puts *\ [join [::platform::patterns [::platform::identify]] \n*\ ]
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puts ====================================
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exit 0
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}
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