Make luci.fs.rename work across fielsystems

[project/luci.git] / libs / core / luasrc / fs.lua

diff --git a/libs/core/luasrc/fs.lua b/libs/core/luasrc/fs.lua
index 56108db..abea5b5 100644 (file)
--- a/libs/core/luasrc/fs.lua
+++ b/libs/core/luasrc/fs.lua
@@ -24,8 +24,11 @@ limitations under the License.
 
 ]]--
 
-local posix = require "posix"
 local io    = require "io"
+local os    = require "os"
+local ltn12 = require "luci.ltn12"
+local posix = require "posix"
+
 local type  = type
 
 --- LuCI filesystem library.
@@ -91,6 +94,32 @@ function writefile(filename, data)
        return true
 end
 
+--- Copies a file.
+-- @param source       Source file
+-- @param dest         Destination
+-- @return                     Boolean containing true on success or nil on error
+function copy(source, dest)
+       return ltn12.pump.all(
+               ltn12.source.file(io.open(source)),
+               ltn12.sink.file(io.open(dest, "w"))
+       )
+end
+
+--- Renames a file.
+-- @param source       Source file
+-- @param dest         Destination
+-- @return                     Boolean containing true on success or nil on error
+function rename(source, dest)
+       local stat, err, code = os.rename(source, dest)
+       if code == 18 then
+               stat, err, code = copy(source, dest)
+               if stat then
+                       stat, err, code = unlink(source)
+               end
+       end
+       return stat, err, code
+end
+
 --- Get the last modification time of given file path in Unix epoch format.
 -- @param path String containing the path of the file or directory to read
 -- @return             Number containing the epoch time or nil on error