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}

namespace eval ::appfs {
	variable cachedir "/tmp/appfs-cache"
	variable ttl 3600
	variable nttl 60
	variable trusted_cas [list]
	variable platform [::platform::generic]

	proc _hash_sep {hash {seps 4}} {
		for {set idx 0} {$idx < $seps} {incr idx} {
			append retval "[string range $hash [expr {$idx * 2}] [expr {($idx * 2) + 1}]]/"
		}
		append retval "[string range $hash [expr {$idx * 2}] end]"

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		if {![::pki::x509::verify_cert $certificate $::appfs::trusted_cas]} {
			return false
		}

		return true
	}

	proc _normalizeOS {os} {
	proc _normalizeOS {os {tolerant 0}} {
		set os [string tolower [string trim $os]]

		switch -- $os {
			"linux" - "freebsd" - "openbsd" - "netbsd" {
				return $os
			}
			"sunos" {
				return "solaris"
			}
			"noarch" - "none" - "any" - "all" {
				return "noarch"
			}
		}

		if {$tolerant} {
			return $os
		}

		return -code error "Unable to normalize OS: $os"
	}

	proc _normalizeCPU {cpu} {
	proc _normalizeCPU {cpu {tolerant 0}} {
		set cpu [string tolower [string trim $cpu]]

		switch -glob -- $cpu {
			"i?86" {
				return "ix86"
			}
			"x86_64" {
				return $cpu
			}
			"noarch" - "none" - "any" - "all" {
				return "noarch"
			}
		}

		if {$tolerant} {
			return $cpu
		}

		return -code error "Unable to normalize CPU: $cpu"
	}

	proc _as_user {code} {
		::appfsd::simulate_user_fs_enter

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					set retval(_children) os-cpu
					set retval(_type) packages

					if {$pathlen > 2} {
						set os_cpu [lindex $path 2]
						set os_cpu [split $os_cpu "-"]

						set retval(os) [lindex $os_cpu 0]
						set retval(cpu) [lindex $os_cpu 1]
						set retval(os) [_normalizeOS [lindex $os_cpu 0] 1]
						set retval(cpu) [_normalizeCPU [lindex $os_cpu 1] 1]
						set retval(_children) versions
						set retval(_type) os-cpu

						if {$pathlen > 3} {
							set retval(version) [lindex $path 3]
							set retval(_children) files
							set retval(_type) versions
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				if {$check == "1"} {
					set retval(type) directory
					set retval(childcount) [llength [getchildren $path]]
				}
			}
			"os-cpu" {
				if {$pathinfo(os) == "platform" && $pathinfo(cpu) == ""} {
					set check [::appfs::db eval {
						SELECT DISTINCT os, cpuArch FROM packages WHERE hostname = $pathinfo(hostname) AND package = $pathinfo(package);
					}]

					set retval(type) symlink

					if {$check == [list "noarch" "noarch"]} {
					set retval(source) [platform::generic]
						set retval(source) "noarch-noarch"
					} else {
						set retval(source) $::appfs::platform
					}
				} else {
					set check [::appfs::db onecolumn {
						SELECT 1 FROM packages WHERE hostname = $pathinfo(hostname) AND package = $pathinfo(package) AND os = $pathinfo(os) AND cpuArch = $pathinfo(cpu);
					}]
					if {$check == "1"} {
						set retval(type) directory
						set retval(childcount) [llength [getchildren $path]]