/usr/share/tcltk/vfs1.3/tclprocvfs.tcl is in tcl-vfs 1.3-20080503-4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 | package provide vfs::ns 0.5
package require vfs 1.0
# Thanks to jcw for the idea here. This is a 'file system' which
# is actually a representation of the Tcl command namespace hierarchy.
# Namespaces are directories, and procedures are files. Tcl allows
# procedures with the same name as a namespace, which are hidden in
# a filesystem representation.
namespace eval vfs::ns {}
proc vfs::ns::Mount {ns local} {
if {![namespace exists ::$ns]} {
error "No such namespace"
}
::vfs::log "ns $ns mounted at $local"
vfs::filesystem mount $local [list vfs::ns::handler $ns]
vfs::RegisterMount $local [list vfs::ns::Unmount]
return $local
}
proc vfs::ns::Unmount {local} {
vfs::filesystem unmount $local
}
proc vfs::ns::handler {ns cmd root relative actualpath args} {
regsub -all / $relative :: relative
if {$cmd == "matchindirectory"} {
eval [list $cmd $ns $relative $actualpath] $args
} else {
eval [list $cmd $ns $relative] $args
}
}
# If we implement the commands below, we will have a perfect
# virtual file system for namespaces.
proc vfs::ns::stat {ns name} {
::vfs::log "stat $name"
if {[namespace exists ::${ns}::${name}]} {
return [list type directory size 0 mode 0777 \
ino -1 depth 0 name $name atime 0 ctime 0 mtime 0 dev -1 \
uid -1 gid -1 nlink 1]
} elseif {[llength [info procs ::${ns}::${name}]]} {
return [list type file]
} else {
return -code error "could not read \"$name\": no such file or directory"
}
}
proc vfs::ns::access {ns name mode} {
::vfs::log "access $name $mode"
if {[namespace exists ::${ns}::${name}]} {
return 1
} elseif {[llength [info procs ::${ns}::${name}]]} {
if {$mode & 2} {
error "read-only"
}
return 1
} else {
error "No such file"
}
}
proc vfs::ns::exists {ns name} {
if {[namespace exists ::${ns}::${name}]} {
return 1
} elseif {[llength [info procs ::${ns}::${name}]]} {
return 1
} else {
return 0
}
}
proc vfs::ns::open {ns name mode permissions} {
::vfs::log "open $name $mode $permissions"
# return a list of two elements:
# 1. first element is the Tcl channel name which has been opened
# 2. second element (optional) is a command to evaluate when
# the channel is closed.
switch -- $mode {
"" -
"r" {
set nfd [vfs::memchan]
set encoding [fconfigure $nfd -encoding]
set eofchar [fconfigure $nfd -eofchar]
set translation [fconfigure $nfd -translation]
fconfigure $nfd -translation binary
puts -nonewline $nfd [_generate ::${ns}::${name}]
fconfigure $nfd -translation $translation -encoding $encoding -eofchar $eofchar
seek $nfd 0
return [list $nfd]
}
default {
return -code error "illegal access mode \"$mode\""
}
}
}
proc vfs::ns::_generate {p} {
lappend a proc $p
set argslist [list]
foreach arg [info args $p] {
if {[info default $p $arg v]} {
lappend argslist [list $arg $v]
} else {
lappend argslist $arg
}
}
lappend a $argslist [info body $p]
}
proc vfs::ns::matchindirectory {ns path actualpath pattern type} {
::vfs::log "matchindirectory $path $actualpath $pattern $type"
set res [list]
if {[::vfs::matchDirectories $type]} {
# add matching directories to $res
if {[string length $pattern]} {
eval lappend res [namespace children ::${ns}::${path} $pattern]
} else {
if {[namespace exists ::${ns}::${path}]} {
eval lappend res ::${ns}::${path}
}
}
}
if {[::vfs::matchFiles $type]} {
# add matching files to $res
if {[string length $pattern]} {
eval lappend res [info procs ::${ns}::${path}::$pattern]
} else {
eval lappend res [info procs ::${ns}]
}
}
set realres [list]
foreach r $res {
regsub "^(::)?${ns}(::)?${path}(::)?" $r $actualpath rr
lappend realres $rr
}
#::vfs::log $realres
return $realres
}
proc vfs::ns::createdirectory {ns name} {
::vfs::log "createdirectory $name"
namespace eval ::${ns}::${name} {}
}
proc vfs::ns::removedirectory {ns name recursive} {
::vfs::log "removedirectory $name"
namespace delete ::${ns}::${name}
}
proc vfs::ns::deletefile {ns name} {
::vfs::log "deletefile $name"
rename ::${ns}::${name} {}
}
proc vfs::ns::fileattributes {ns name args} {
::vfs::log "fileattributes $args"
switch -- [llength $args] {
0 {
# list strings
return [list -args -body]
}
1 {
# get value
set index [lindex $args 0]
switch -- $index {
0 {
::info args ::${ns}::${name}
}
1 {
::info body ::${ns}::${name}
}
}
}
2 {
# set value
set index [lindex $args 0]
set val [lindex $args 1]
switch -- $index {
0 {
error "read-only"
}
1 {
error "unimplemented"
}
}
}
}
}
proc vfs::ns::utime {what name actime mtime} {
::vfs::log "utime $name"
error ""
}
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