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
|
{- Linux library copier and binary shimmer
-
- Copyright 2013 Joey Hess <joey@kitenet.net>
-
- Licensed under the GNU GPL version 3 or higher.
-}
module Main where
import Control.Applicative
import System.Environment
import Data.Maybe
import System.FilePath
import System.Directory
import Control.Monad
import Data.List
import Data.List.Utils
import System.Posix.Files
import Data.Char
import Control.Monad.IfElse
import Utility.PartialPrelude
import Utility.Directory
import Utility.Process
import Utility.Monad
import Utility.Path
import Utility.FileMode
import Utility.CopyFile
main :: IO ()
main = getArgs >>= go
where
go [] = error "specify LINUXSTANDALONE_DIST"
go (top:_) = mklibs top
mklibs :: FilePath -> IO ()
mklibs top = do
fs <- dirContentsRecursive top
mapM_ symToHardLink fs
exes <- filterM checkExe fs
libs <- parseLdd <$> readProcess "ldd" exes
glibclibs <- glibcLibs
let libs' = nub $ libs ++ glibclibs
libdirs <- nub . catMaybes <$> mapM (installLib top) libs'
-- Various files used by runshell to set up env vars used by the
-- linker shims.
writeFile (top </> "libdirs") (unlines libdirs)
writeFile (top </> "linker")
(Prelude.head $ filter ("ld-linux" `isInfixOf`) libs')
writeFile (top </> "gconvdir")
(parentDir $ Prelude.head $ filter ("/gconv/" `isInfixOf`) glibclibs)
mapM_ (installLinkerShim top) exes
{- Installs a library. If the library is a symlink to another file,
- install the file it links to, and update the symlink to be relative. -}
installLib :: FilePath -> FilePath -> IO (Maybe FilePath)
installLib top lib = ifM (doesFileExist lib)
( do
installFile top lib
checksymlink lib
return $ Just $ parentDir lib
, return Nothing
)
where
checksymlink f = whenM (isSymbolicLink <$> getSymbolicLinkStatus (inTop top f)) $ do
l <- readSymbolicLink (inTop top f)
let absl = absPathFrom (parentDir f) l
let target = relPathDirToFile (parentDir f) absl
installFile top absl
nukeFile (top ++ f)
createSymbolicLink target (inTop top f)
checksymlink absl
{- Installs a linker shim script around a binary.
-
- Note that each binary is put into its own separate directory,
- to avoid eg git looking for binaries in its directory rather
- than in PATH.-}
installLinkerShim :: FilePath -> FilePath -> IO ()
installLinkerShim top exe = do
createDirectoryIfMissing True shimdir
renameFile exe exedest
writeFile exe $ unlines
[ "#!/bin/sh"
, "exec \"$GIT_ANNEX_LINKER\" --library-path \"$GIT_ANNEX_LD_LIBRARY_PATH\" \"$GIT_ANNEX_SHIMMED/" ++ base ++ "/" ++ base ++ "\" \"$@\""
]
modifyFileMode exe $ addModes executeModes
where
base = takeFileName exe
shimdir = top </> "shimmed" </> base
exedest = shimdir </> base
{- Converting symlinks to hard links simplifies the binary shimming
- process. -}
symToHardLink :: FilePath -> IO ()
symToHardLink f = whenM (isSymbolicLink <$> getSymbolicLinkStatus f) $ do
l <- readSymbolicLink f
let absl = absPathFrom (parentDir f) l
nukeFile f
createLink absl f
installFile :: FilePath -> FilePath -> IO ()
installFile top f = do
createDirectoryIfMissing True destdir
void $ copyFileExternal f destdir
where
destdir = inTop top $ parentDir f
-- Note that f is not relative, so cannot use </>
inTop :: FilePath -> FilePath -> FilePath
inTop top f = top ++ f --
checkExe :: FilePath -> IO Bool
checkExe f
| ".so" `isSuffixOf` f = return False
| otherwise = ifM (isExecutable . fileMode <$> getFileStatus f)
( checkFileExe <$> readProcess "file" [f]
, return False
)
{- Check that file(1) thinks it's a Linux ELF executable, or possibly
- a shared library (a few executables like ssh appear as shared libraries). -}
checkFileExe :: String -> Bool
checkFileExe s = and
[ "ELF" `isInfixOf` s
, "executable" `isInfixOf` s || "shared object" `isInfixOf` s
]
{- Parse ldd output, getting all the libraries that the input files
- link to. Note that some of the libraries may not exist
- (eg, linux-vdso.so) -}
parseLdd :: String -> [FilePath]
parseLdd = catMaybes . map (getlib . dropWhile isSpace) . lines
where
getlib l = headMaybe . words =<< lastMaybe (split " => " l)
{- Get all glibc libs and other support files, including gconv files
-
- XXX Debian specific. -}
glibcLibs :: IO [FilePath]
glibcLibs = lines <$> readProcess "sh"
["-c", "dpkg -L libc6:$(dpkg --print-architecture) libgcc1:$(dpkg --print-architecture) | egrep '\\.so|gconv'"]
|
