libs/luci-lib-ipkg/luasrc/model/ipkg.lua

   1 -- Copyright 2008-2011 Jo-Philipp Wich <jow@openwrt.org>
   2 -- Copyright 2008 Steven Barth <steven@midlink.org>
   3 -- Licensed to the public under the Apache License 2.0.
   4
   5 local os   = require "os"
   6 local io   = require "io"
   7 local fs   = require "nixio.fs"
   8 local util = require "luci.util"
   9
  10 local type  = type
  11 local pairs = pairs
  12 local error = error
  13 local table = table
  14
  15 local ipkg = "opkg --force-removal-of-dependent-packages --force-overwrite --nocase"
  16 local icfg = "/etc/opkg.conf"
  17
  18 module "luci.model.ipkg"
  19
  20
  21 -- Internal action function
  22 local function _action(cmd, ...)
  23         local cmdline = { ipkg, cmd }
  24
  25         local k, v
  26         for k, v in pairs({...}) do
  27                 cmdline[#cmdline+1] = util.shellquote(v)
  28         end
  29
  30         local c = "%s >/tmp/opkg.stdout 2>/tmp/opkg.stderr" % table.concat(cmdline, " ")
  31         local r = os.execute(c)
  32         local e = fs.readfile("/tmp/opkg.stderr")
  33         local o = fs.readfile("/tmp/opkg.stdout")
  34
  35         fs.unlink("/tmp/opkg.stderr")
  36         fs.unlink("/tmp/opkg.stdout")
  37
  38         return r, o or "", e or ""
  39 end
  40
  41 -- Internal parser function
  42 local function _parselist(rawdata)
  43         if type(rawdata) ~= "function" then
  44                 error("OPKG: Invalid rawdata given")
  45         end
  46
  47         local data = {}
  48         local c = {}
  49         local l = nil
  50
  51         for line in rawdata do
  52                 if line:sub(1, 1) ~= " " then
  53                         local key, val = line:match("(.-): ?(.*)%s*")
  54
  55                         if key and val then
  56                                 if key == "Package" then
  57                                         c = {Package = val}
  58                                         data[val] = c
  59                                 elseif key == "Status" then
  60                                         c.Status = {}
  61                                         for j in val:gmatch("([^ ]+)") do
  62                                                 c.Status[j] = true
  63                                         end
  64                                 else
  65                                         c[key] = val
  66                                 end
  67                                 l = key
  68                         end
  69                 else
  70                         -- Multi-line field
  71                         c[l] = c[l] .. "\n" .. line
  72                 end
  73         end
  74
  75         return data
  76 end
  77
  78 -- Internal lookup function
  79 local function _lookup(cmd, pkg)
  80         local cmdline = { ipkg, cmd }
  81         if pkg then
  82                 cmdline[#cmdline+1] = util.shellquote(pkg)
  83         end
  84
  85         -- OPKG sometimes kills the whole machine because it sucks
  86         -- Therefore we have to use a sucky approach too and use
  87         -- tmpfiles instead of directly reading the output
  88         local tmpfile = os.tmpname()
  89         os.execute("%s >%s 2>/dev/null" %{ table.concat(cmdline, " "), tmpfile })
  90
  91         local data = _parselist(io.lines(tmpfile))
  92         os.remove(tmpfile)
  93         return data
  94 end
  95
  96
  97 function info(pkg)
  98         return _lookup("info", pkg)
  99 end
 100
 101 function status(pkg)
 102         return _lookup("status", pkg)
 103 end
 104
 105 function install(...)
 106         return _action("install", ...)
 107 end
 108
 109 function installed(pkg)
 110         local p = status(pkg)[pkg]
 111         return (p and p.Status and p.Status.installed)
 112 end
 113
 114 function remove(...)
 115         return _action("remove", ...)
 116 end
 117
 118 function update()
 119         return _action("update")
 120 end
 121
 122 function upgrade()
 123         return _action("upgrade")
 124 end
 125
 126 -- List helper
 127 local function _list(action, pat, cb)
 128         local cmdline = { ipkg, action }
 129         if pat then
 130                 cmdline[#cmdline+1] = util.shellquote(pat)
 131         end
 132
 133         local fd = io.popen(table.concat(cmdline, " "))
 134         if fd then
 135                 local name, version, sz, desc
 136                 while true do
 137                         local line = fd:read("*l")
 138                         if not line then break end
 139
 140                         name, version, sz, desc = line:match("^(.-) %- (.-) %- (.-) %- (.+)")
 141
 142                         if not name then
 143                                 name, version, sz = line:match("^(.-) %- (.-) %- (.+)")
 144                                 desc = ""
 145                         end
 146
 147                         if name and version then
 148                                 if #version > 26 then
 149                                         version = version:sub(1,21) .. ".." .. version:sub(-3,-1)
 150                                 end
 151
 152                                 cb(name, version, sz, desc)
 153                         end
 154
 155                         name    = nil
 156                         version = nil
 157                         sz      = nil
 158                         desc    = nil
 159                 end
 160
 161                 fd:close()
 162         end
 163 end
 164
 165 function list_all(pat, cb)
 166         _list("list --size", pat, cb)
 167 end
 168
 169 function list_installed(pat, cb)
 170         _list("list_installed --size", pat, cb)
 171 end
 172
 173 function find(pat, cb)
 174         _list("find --size", pat, cb)
 175 end
 176
 177
 178 function overlay_root()
 179         local od = "/"
 180         local fd = io.open(icfg, "r")
 181
 182         if fd then
 183                 local ln
 184
 185                 repeat
 186                         ln = fd:read("*l")
 187                         if ln and ln:match("^%s*option%s+overlay_root%s+") then
 188                                 od = ln:match("^%s*option%s+overlay_root%s+(%S+)")
 189
 190                                 local s = fs.stat(od)
 191                                 if not s or s.type ~= "dir" then
 192                                         od = "/"
 193                                 end
 194
 195                                 break
 196                         end
 197                 until not ln
 198
 199                 fd:close()
 200         end
 201
 202         return od
 203 end
 204
 205 function compare_versions(ver1, comp, ver2)
 206         if not ver1 or not ver2
 207         or not comp or not (#comp > 0) then
 208                 error("Invalid parameters")
 209                 return nil
 210         end
 211         -- correct compare string
 212         if comp == "<>" or comp == "><" or comp == "!=" or comp == "~=" then comp = "~="
 213         elseif comp == "<=" or comp == "<" or comp == "=<" then comp = "<="
 214         elseif comp == ">=" or comp == ">" or comp == "=>" then comp = ">="
 215         elseif comp == "="  or comp == "==" then comp = "=="
 216         elseif comp == "<<" then comp = "<"
 217         elseif comp == ">>" then comp = ">"
 218         else
 219                 error("Invalid compare string")
 220                 return nil
 221         end
 222
 223         local av1 = util.split(ver1, "[%.%-]", nil, true)
 224         local av2 = util.split(ver2, "[%.%-]", nil, true)
 225
 226         local max = table.getn(av1)
 227         if (table.getn(av1) < table.getn(av2)) then
 228                 max = table.getn(av2)
 229         end
 230
 231         for i = 1, max, 1  do
 232                 local s1 = av1[i] or ""
 233                 local s2 = av2[i] or ""
 234
 235                 -- first "not equal" found return true
 236                 if comp == "~=" and (s1 ~= s2) then return true end
 237                 -- first "lower" found return true
 238                 if (comp == "<" or comp == "<=") and (s1 < s2) then return true end
 239                 -- first "greater" found return true
 240                 if (comp == ">" or comp == ">=") and (s1 > s2) then return true end
 241                 -- not equal then return false
 242                 if (s1 ~= s2) then return false end
 243         end
 244
 245         -- all equal and not compare greater or lower then true
 246         return not (comp == "<" or comp == ">")
 247 end