1 -----------------------------------------------------------------------------
3 -- (c) The University of Glasgow 2001
5 -- Access to system tools: gcc, cp, rm etc
7 -----------------------------------------------------------------------------
14 setPgmL, -- String -> IO ()
26 -- Command-line override
29 getTopDir, -- IO String -- The value of $libdir
30 getPackageConfigPath, -- IO String -- Where package.conf is
32 -- Interface to system tools
33 runUnlit, runCpp, runCc, -- [Option] -> IO ()
34 runPp, -- [Option] -> IO ()
35 runMangle, runSplit, -- [Option] -> IO ()
36 runAs, runLink, -- [Option] -> IO ()
39 runIlx2il, runIlasm, -- [String] -> IO ()
43 touch, -- String -> String -> IO ()
44 copy, -- String -> String -> String -> IO ()
45 normalisePath, -- FilePath -> FilePath
47 -- Temporary-file management
50 cleanTempFiles, cleanTempFilesExcept, removeTmpFiles,
54 getProcessID, -- IO Int
55 system, -- String -> IO ExitCode
58 showGhcUsage, -- IO () Shows usage message and exits
59 getSysMan, -- IO String Parallel system only
65 #include "HsVersions.h"
70 import Panic ( progName, GhcException(..) )
71 import Util ( global, notNull )
72 import CmdLineOpts ( dynFlag, verbosity )
74 import EXCEPTION ( throwDyn )
75 import DATA_IOREF ( IORef, readIORef, writeIORef )
78 import Monad ( when, unless )
79 import System ( ExitCode(..), exitWith, getEnv, system )
80 import IO ( try, catch,
81 openFile, hPutChar, hPutStrLn, hPutStr, hClose, hFlush, IOMode(..),
83 import Directory ( doesFileExist, removeFile )
84 import List ( intersperse )
86 #include "../includes/config.h"
88 -- GHC <= 4.08 didn't have rawSystem, and runs into problems with long command
89 -- lines on mingw32, so we disallow it now.
90 #if __GLASGOW_HASKELL__ < 500
91 #error GHC >= 5.00 is required for bootstrapping GHC
94 #ifndef mingw32_HOST_OS
95 #if __GLASGOW_HASKELL__ > 504
96 import qualified System.Posix.Internals
98 import qualified Posix
100 #else /* Must be Win32 */
101 import List ( isPrefixOf )
102 import Util ( dropList )
104 import CString ( CString, peekCString )
107 #if __GLASGOW_HASKELL__ < 601
108 import Foreign ( withMany, withArray0, nullPtr, Ptr )
109 import CForeign ( CString, withCString, throwErrnoIfMinus1 )
111 import System.Cmd ( rawSystem )
116 The configuration story
117 ~~~~~~~~~~~~~~~~~~~~~~~
119 GHC needs various support files (library packages, RTS etc), plus
120 various auxiliary programs (cp, gcc, etc). It finds these in one
123 * When running as an *installed program*, GHC finds most of this support
124 stuff in the installed library tree. The path to this tree is passed
125 to GHC via the -B flag, and given to initSysTools .
127 * When running *in-place* in a build tree, GHC finds most of this support
128 stuff in the build tree. The path to the build tree is, again passed
131 GHC tells which of the two is the case by seeing whether package.conf
132 is in TopDir [installed] or in TopDir/ghc/driver [inplace] (what a hack).
135 SysTools.initSysProgs figures out exactly where all the auxiliary programs
136 are, and initialises mutable variables to make it easy to call them.
137 To to this, it makes use of definitions in Config.hs, which is a Haskell
138 file containing variables whose value is figured out by the build system.
140 Config.hs contains two sorts of things
142 cGCC, The *names* of the programs
145 etc They do *not* include paths
148 cUNLIT_DIR_REL The *path* to the directory containing unlit, split etc
149 cSPLIT_DIR_REL *relative* to the root of the build tree,
150 for use when running *in-place* in a build tree (only)
154 ---------------------------------------------
155 NOTES for an ALTERNATIVE scheme (i.e *not* what is currently implemented):
157 Another hair-brained scheme for simplifying the current tool location
158 nightmare in GHC: Simon originally suggested using another
159 configuration file along the lines of GCC's specs file - which is fine
160 except that it means adding code to read yet another configuration
161 file. What I didn't notice is that the current package.conf is
162 general enough to do this:
165 {name = "tools", import_dirs = [], source_dirs = [],
166 library_dirs = [], hs_libraries = [], extra_libraries = [],
167 include_dirs = [], c_includes = [], package_deps = [],
168 extra_ghc_opts = ["-pgmc/usr/bin/gcc","-pgml${libdir}/bin/unlit", ... etc.],
169 extra_cc_opts = [], extra_ld_opts = []}
171 Which would have the advantage that we get to collect together in one
172 place the path-specific package stuff with the path-specific tool
175 ---------------------------------------------
178 %************************************************************************
180 \subsection{Global variables to contain system programs}
182 %************************************************************************
184 All these pathnames are maintained IN THE NATIVE FORMAT OF THE HOST MACHINE.
185 (See remarks under pathnames below)
188 GLOBAL_VAR(v_Pgm_L, error "pgm_L", String) -- unlit
189 GLOBAL_VAR(v_Pgm_P, error "pgm_P", (String,[Option])) -- cpp
190 GLOBAL_VAR(v_Pgm_F, error "pgm_F", String) -- pp
191 GLOBAL_VAR(v_Pgm_c, error "pgm_c", String) -- gcc
192 GLOBAL_VAR(v_Pgm_m, error "pgm_m", String) -- asm code mangler
193 GLOBAL_VAR(v_Pgm_s, error "pgm_s", String) -- asm code splitter
194 GLOBAL_VAR(v_Pgm_a, error "pgm_a", String) -- as
196 GLOBAL_VAR(v_Pgm_I, error "pgm_I", String) -- ilx2il
197 GLOBAL_VAR(v_Pgm_i, error "pgm_i", String) -- ilasm
199 GLOBAL_VAR(v_Pgm_l, error "pgm_l", String) -- ld
200 GLOBAL_VAR(v_Pgm_MkDLL, error "pgm_dll", String) -- mkdll
202 GLOBAL_VAR(v_Pgm_T, error "pgm_T", String) -- touch
203 GLOBAL_VAR(v_Pgm_CP, error "pgm_CP", String) -- cp
205 GLOBAL_VAR(v_Path_package_config, error "path_package_config", String)
206 GLOBAL_VAR(v_Path_usage, error "ghc_usage.txt", String)
208 GLOBAL_VAR(v_TopDir, error "TopDir", String) -- -B<dir>
210 -- Parallel system only
211 GLOBAL_VAR(v_Pgm_sysman, error "pgm_sysman", String) -- system manager
213 -- ways to get at some of these variables from outside this module
214 getPackageConfigPath = readIORef v_Path_package_config
215 getTopDir = readIORef v_TopDir
219 %************************************************************************
221 \subsection{Initialisation}
223 %************************************************************************
226 initSysTools :: [String] -- Command-line arguments starting "-B"
228 -> IO () -- Set all the mutable variables above, holding
229 -- (a) the system programs
230 -- (b) the package-config file
231 -- (c) the GHC usage message
234 initSysTools minusB_args
235 = do { (am_installed, top_dir) <- findTopDir minusB_args
236 ; writeIORef v_TopDir top_dir
238 -- for "installed" this is the root of GHC's support files
239 -- for "in-place" it is the root of the build tree
240 -- NB: top_dir is assumed to be in standard Unix format '/' separated
242 ; let installed, installed_bin :: FilePath -> FilePath
243 installed_bin pgm = pgmPath top_dir pgm
244 installed file = pgmPath top_dir file
245 inplace dir pgm = pgmPath (top_dir `slash`
246 cPROJECT_DIR `slash` dir) pgm
249 | am_installed = installed "package.conf"
250 | otherwise = inplace cGHC_DRIVER_DIR_REL "package.conf.inplace"
253 | am_installed = installed "ghc-usage.txt"
254 | otherwise = inplace cGHC_DRIVER_DIR_REL "ghc-usage.txt"
256 -- For all systems, unlit, split, mangle are GHC utilities
257 -- architecture-specific stuff is done when building Config.hs
259 | am_installed = installed_bin cGHC_UNLIT_PGM
260 | otherwise = inplace cGHC_UNLIT_DIR_REL cGHC_UNLIT_PGM
262 -- split and mangle are Perl scripts
264 | am_installed = installed_bin cGHC_SPLIT_PGM
265 | otherwise = inplace cGHC_SPLIT_DIR_REL cGHC_SPLIT_PGM
268 | am_installed = installed_bin cGHC_MANGLER_PGM
269 | otherwise = inplace cGHC_MANGLER_DIR_REL cGHC_MANGLER_PGM
271 #ifndef mingw32_HOST_OS
272 -- check whether TMPDIR is set in the environment
273 ; IO.try (do dir <- getEnv "TMPDIR" -- fails if not set
278 -- On Win32, consult GetTempPath() for a temp dir.
279 -- => it first tries TMP, TEMP, then finally the
280 -- Windows directory(!). The directory is in short-path
281 -- form and *does* have a trailing backslash.
283 let len = (2048::Int)
284 buf <- mallocArray len
285 ret <- getTempPath len buf
288 -- failed, consult TEMP.
296 -- strip the trailing backslash (awful, but
297 -- we only do this once).
307 -- Check that the package config exists
308 ; config_exists <- doesFileExist pkgconfig_path
309 ; when (not config_exists) $
310 throwDyn (InstallationError
311 ("Can't find package.conf as " ++ pkgconfig_path))
313 #if defined(mingw32_HOST_OS)
314 -- WINDOWS-SPECIFIC STUFF
315 -- On Windows, gcc and friends are distributed with GHC,
316 -- so when "installed" we look in TopDir/bin
317 -- When "in-place" we look wherever the build-time configure
319 -- When "install" we tell gcc where its specs file + exes are (-B)
320 -- and also some places to pick up include files. We need
321 -- to be careful to put all necessary exes in the -B place
322 -- (as, ld, cc1, etc) since if they don't get found there, gcc
323 -- then tries to run unadorned "as", "ld", etc, and will
324 -- pick up whatever happens to be lying around in the path,
325 -- possibly including those from a cygwin install on the target,
326 -- which is exactly what we're trying to avoid.
327 ; let gcc_path | am_installed = installed_bin ("gcc -B\"" ++ installed "gcc-lib/\"")
329 -- The trailing "/" is absolutely essential; gcc seems
330 -- to construct file names simply by concatenating to this
331 -- -B path with no extra slash
332 -- We use "/" rather than "\\" because otherwise "\\\" is mangled
333 -- later on; although gcc_path is in NATIVE format, gcc can cope
334 -- (see comments with declarations of global variables)
336 -- The quotes round the -B argument are in case TopDir has spaces in it
338 perl_path | am_installed = installed_bin cGHC_PERL
339 | otherwise = cGHC_PERL
341 -- 'touch' is a GHC util for Windows, and similarly unlit, mangle
342 ; let touch_path | am_installed = installed_bin cGHC_TOUCHY_PGM
343 | otherwise = inplace cGHC_TOUCHY_DIR_REL cGHC_TOUCHY_PGM
345 -- On Win32 we don't want to rely on #!/bin/perl, so we prepend
346 -- a call to Perl to get the invocation of split and mangle
347 ; let split_path = perl_path ++ " \"" ++ split_script ++ "\""
348 mangle_path = perl_path ++ " \"" ++ mangle_script ++ "\""
351 | am_installed = pgmPath (installed "gcc-lib/") cMKDLL ++
352 " --dlltool-name " ++ pgmPath (installed "gcc-lib/") "dlltool" ++
353 " --driver-name " ++ gcc_path
356 -- UNIX-SPECIFIC STUFF
357 -- On Unix, the "standard" tools are assumed to be
358 -- in the same place whether we are running "in-place" or "installed"
359 -- That place is wherever the build-time configure script found them.
360 ; let gcc_path = cGCC
362 mkdll_path = panic "Can't build DLLs on a non-Win32 system"
364 -- On Unix, scripts are invoked using the '#!' method. Binary
365 -- installations of GHC on Unix place the correct line on the front
366 -- of the script at installation time, so we don't want to wire-in
367 -- our knowledge of $(PERL) on the host system here.
368 ; let split_path = split_script
369 mangle_path = mangle_script
372 -- cpp is derived from gcc on all platforms
373 -- HACK, see setPgmP below. We keep 'words' here to remember to fix
374 -- Config.hs one day.
375 ; let cpp_path = (gcc_path, (Option "-E"):(map Option (words cRAWCPP_FLAGS)))
377 -- For all systems, copy and remove are provided by the host
378 -- system; architecture-specific stuff is done when building Config.hs
379 ; let cp_path = cGHC_CP
381 -- Other things being equal, as and ld are simply gcc
382 ; let as_path = gcc_path
386 -- ilx2il and ilasm are specified in Config.hs
387 ; let ilx2il_path = cILX2IL
391 -- Initialise the global vars
392 ; writeIORef v_Path_package_config pkgconfig_path
393 ; writeIORef v_Path_usage ghc_usage_msg_path
395 ; writeIORef v_Pgm_sysman (top_dir ++ "/ghc/rts/parallel/SysMan")
396 -- Hans: this isn't right in general, but you can
397 -- elaborate it in the same way as the others
399 ; writeIORef v_Pgm_L unlit_path
400 ; writeIORef v_Pgm_P cpp_path
401 ; writeIORef v_Pgm_F ""
402 ; writeIORef v_Pgm_c gcc_path
403 ; writeIORef v_Pgm_m mangle_path
404 ; writeIORef v_Pgm_s split_path
405 ; writeIORef v_Pgm_a as_path
407 ; writeIORef v_Pgm_I ilx2il_path
408 ; writeIORef v_Pgm_i ilasm_path
410 ; writeIORef v_Pgm_l ld_path
411 ; writeIORef v_Pgm_MkDLL mkdll_path
412 ; writeIORef v_Pgm_T touch_path
413 ; writeIORef v_Pgm_CP cp_path
418 #if defined(mingw32_HOST_OS)
419 foreign import stdcall "GetTempPathA" unsafe getTempPath :: Int -> CString -> IO Int32
423 The various setPgm functions are called when a command-line option
428 is used to override a particular program with a new one
431 setPgmL = writeIORef v_Pgm_L
432 -- XXX HACK: Prelude> words "'does not' work" ===> ["'does","not'","work"]
433 -- Config.hs should really use Option.
434 setPgmP arg = let (pgm:args) = words arg in writeIORef v_Pgm_P (pgm,map Option args)
435 setPgmF = writeIORef v_Pgm_F
436 setPgmc = writeIORef v_Pgm_c
437 setPgmm = writeIORef v_Pgm_m
438 setPgms = writeIORef v_Pgm_s
439 setPgma = writeIORef v_Pgm_a
440 setPgml = writeIORef v_Pgm_l
442 setPgmI = writeIORef v_Pgm_I
443 setPgmi = writeIORef v_Pgm_i
450 -- for "installed" this is the root of GHC's support files
451 -- for "in-place" it is the root of the build tree
454 -- 1. Set proto_top_dir
455 -- a) look for (the last) -B flag, and use it
456 -- b) if there are no -B flags, get the directory
457 -- where GHC is running (only on Windows)
459 -- 2. If package.conf exists in proto_top_dir, we are running
460 -- installed; and TopDir = proto_top_dir
462 -- 3. Otherwise we are running in-place, so
463 -- proto_top_dir will be /...stuff.../ghc/compiler
464 -- Set TopDir to /...stuff..., which is the root of the build tree
466 -- This is very gruesome indeed
468 findTopDir :: [String]
469 -> IO (Bool, -- True <=> am installed, False <=> in-place
470 String) -- TopDir (in Unix format '/' separated)
473 = do { top_dir <- get_proto
474 -- Discover whether we're running in a build tree or in an installation,
475 -- by looking for the package configuration file.
476 ; am_installed <- doesFileExist (top_dir `slash` "package.conf")
478 ; return (am_installed, top_dir)
481 -- get_proto returns a Unix-format path (relying on getBaseDir to do so too)
482 get_proto | notNull minusbs
483 = return (normalisePath (drop 2 (last minusbs))) -- 2 for "-B"
485 = do { maybe_exec_dir <- getBaseDir -- Get directory of executable
486 ; case maybe_exec_dir of -- (only works on Windows;
487 -- returns Nothing on Unix)
488 Nothing -> throwDyn (InstallationError "missing -B<dir> option")
489 Just dir -> return dir
494 %************************************************************************
496 \subsection{Command-line options}
498 %************************************************************************
500 When invoking external tools as part of the compilation pipeline, we
501 pass these a sequence of options on the command-line. Rather than
502 just using a list of Strings, we use a type that allows us to distinguish
503 between filepaths and 'other stuff'. [The reason being, of course, that
504 this type gives us a handle on transforming filenames, and filenames only,
505 to whatever format they're expected to be on a particular platform.]
509 = FileOption -- an entry that _contains_ filename(s) / filepaths.
510 String -- a non-filepath prefix that shouldn't be transformed (e.g., "/out="
511 String -- the filepath/filename portion
514 showOpt (FileOption pre f) = pre ++ platformPath f
515 showOpt (Option "") = ""
516 showOpt (Option s) = s
521 %************************************************************************
523 \subsection{Running an external program}
525 %************************************************************************
529 runUnlit :: [Option] -> IO ()
530 runUnlit args = do p <- readIORef v_Pgm_L
531 runSomething "Literate pre-processor" p args
533 runCpp :: [Option] -> IO ()
534 runCpp args = do (p,baseArgs) <- readIORef v_Pgm_P
535 runSomething "C pre-processor" p (baseArgs ++ args)
537 runPp :: [Option] -> IO ()
538 runPp args = do p <- readIORef v_Pgm_F
539 runSomething "Haskell pre-processor" p args
541 runCc :: [Option] -> IO ()
542 runCc args = do p <- readIORef v_Pgm_c
543 runSomething "C Compiler" p args
545 runMangle :: [Option] -> IO ()
546 runMangle args = do p <- readIORef v_Pgm_m
547 runSomething "Mangler" p args
549 runSplit :: [Option] -> IO ()
550 runSplit args = do p <- readIORef v_Pgm_s
551 runSomething "Splitter" p args
553 runAs :: [Option] -> IO ()
554 runAs args = do p <- readIORef v_Pgm_a
555 runSomething "Assembler" p args
557 runLink :: [Option] -> IO ()
558 runLink args = do p <- readIORef v_Pgm_l
559 runSomething "Linker" p args
562 runIlx2il :: [Option] -> IO ()
563 runIlx2il args = do p <- readIORef v_Pgm_I
564 runSomething "Ilx2Il" p args
566 runIlasm :: [Option] -> IO ()
567 runIlasm args = do p <- readIORef v_Pgm_i
568 runSomething "Ilasm" p args
571 runMkDLL :: [Option] -> IO ()
572 runMkDLL args = do p <- readIORef v_Pgm_MkDLL
573 runSomething "Make DLL" p args
575 touch :: String -> String -> IO ()
576 touch purpose arg = do p <- readIORef v_Pgm_T
577 runSomething purpose p [FileOption "" arg]
579 copy :: String -> String -> String -> IO ()
580 copy purpose from to = do
581 verb <- dynFlag verbosity
582 when (verb >= 2) $ hPutStrLn stderr ("*** " ++ purpose)
584 h <- openFile to WriteMode
585 ls <- readFile from -- inefficient, but it'll do for now.
586 -- ToDo: speed up via slurping.
592 getSysMan :: IO String -- How to invoke the system manager
593 -- (parallel system only)
594 getSysMan = readIORef v_Pgm_sysman
597 %************************************************************************
599 \subsection{GHC Usage message}
601 %************************************************************************
603 Show the usage message and exit
606 showGhcUsage = do { usage_path <- readIORef v_Path_usage
607 ; usage <- readFile usage_path
609 ; exitWith ExitSuccess }
612 dump ('$':'$':s) = hPutStr stderr progName >> dump s
613 dump (c:s) = hPutChar stderr c >> dump s
617 %************************************************************************
619 \subsection{Managing temporary files
621 %************************************************************************
624 GLOBAL_VAR(v_FilesToClean, [], [String] )
625 GLOBAL_VAR(v_TmpDir, cDEFAULT_TMPDIR, String )
626 -- v_TmpDir has no closing '/'
630 setTmpDir dir = writeIORef v_TmpDir dir
632 cleanTempFiles :: Int -> IO ()
633 cleanTempFiles verb = do fs <- readIORef v_FilesToClean
634 removeTmpFiles verb fs
636 cleanTempFilesExcept :: Int -> [FilePath] -> IO ()
637 cleanTempFilesExcept verb dont_delete
638 = do fs <- readIORef v_FilesToClean
639 let leftovers = filter (`notElem` dont_delete) fs
640 removeTmpFiles verb leftovers
641 writeIORef v_FilesToClean dont_delete
644 -- find a temporary name that doesn't already exist.
645 newTempName :: Suffix -> IO FilePath
647 = do x <- getProcessID
648 tmp_dir <- readIORef v_TmpDir
649 findTempName tmp_dir x
651 findTempName tmp_dir x
652 = do let filename = tmp_dir ++ "/ghc" ++ show x ++ '.':extn
653 b <- doesFileExist filename
654 if b then findTempName tmp_dir (x+1)
655 else do add v_FilesToClean filename -- clean it up later
658 addFilesToClean :: [FilePath] -> IO ()
659 -- May include wildcards [used by DriverPipeline.run_phase SplitMangle]
660 addFilesToClean files = mapM_ (add v_FilesToClean) files
662 removeTmpFiles :: Int -> [FilePath] -> IO ()
663 removeTmpFiles verb fs
664 = traceCmd "Deleting temp files"
665 ("Deleting: " ++ unwords fs)
668 rm f = removeFile f `IO.catch`
671 hPutStrLn stderr ("Warning: deleting non-existent " ++ f)
677 %************************************************************************
679 \subsection{Running a program}
681 %************************************************************************
684 GLOBAL_VAR(v_Dry_run, False, Bool)
687 setDryRun = writeIORef v_Dry_run True
689 -----------------------------------------------------------------------------
690 -- Running an external program
692 runSomething :: String -- For -v message
693 -> String -- Command name (possibly a full path)
694 -- assumed already dos-ified
695 -> [Option] -- Arguments
696 -- runSomething will dos-ify them
699 runSomething phase_name pgm args = do
700 let real_args = filter notNull (map showOpt args)
701 traceCmd phase_name (concat (intersperse " " (pgm:real_args))) $ do
702 exit_code <- rawSystem pgm real_args
703 if (exit_code /= ExitSuccess)
704 then throwDyn (PhaseFailed phase_name exit_code)
707 traceCmd :: String -> String -> IO () -> IO ()
708 -- a) trace the command (at two levels of verbosity)
709 -- b) don't do it at all if dry-run is set
710 traceCmd phase_name cmd_line action
711 = do { verb <- dynFlag verbosity
712 ; when (verb >= 2) $ hPutStrLn stderr ("*** " ++ phase_name)
713 ; when (verb >= 3) $ hPutStrLn stderr cmd_line
717 ; n <- readIORef v_Dry_run
721 ; action `IO.catch` handle_exn verb
724 handle_exn verb exn = do { when (verb >= 2) (hPutStr stderr "\n")
725 ; when (verb >= 3) (hPutStrLn stderr ("Failed: " ++ cmd_line ++ (show exn)))
726 ; throwDyn (PhaseFailed phase_name (ExitFailure 1)) }
728 -- -----------------------------------------------------------------------------
729 -- rawSystem: run an external command
731 #if __GLASGOW_HASKELL__ < 601
733 -- This code is copied from System.Cmd on GHC 6.1.
735 rawSystem :: FilePath -> [String] -> IO ExitCode
737 #ifndef mingw32_TARGET_OS
740 withCString cmd $ \pcmd ->
741 withMany withCString (cmd:args) $ \cstrs ->
742 withArray0 nullPtr cstrs $ \arr -> do
743 status <- throwErrnoIfMinus1 "rawSystem" (c_rawSystem pcmd arr)
745 0 -> return ExitSuccess
746 n -> return (ExitFailure n)
748 foreign import ccall unsafe "rawSystem"
749 c_rawSystem :: CString -> Ptr CString -> IO Int
753 -- On Windows, the command line is passed to the operating system as
754 -- a single string. Command-line parsing is done by the executable
756 rawSystem cmd args = do
757 let cmdline = {-translate-} cmd ++ concat (map ((' ':) . translate) args)
758 -- Urk, don't quote/escape the command name on Windows, because the
759 -- compiler is exceedingly naughty and sometimes uses 'perl "..."'
760 -- as the command name.
761 withCString cmdline $ \pcmdline -> do
762 status <- throwErrnoIfMinus1 "rawSystem" (c_rawSystem pcmdline)
764 0 -> return ExitSuccess
765 n -> return (ExitFailure n)
767 translate :: String -> String
768 translate str = '"' : foldr escape "\"" str
769 where escape '"' str = '\\' : '"' : str
770 escape '\\' str = '\\' : '\\' : str
771 escape c str = c : str
773 foreign import ccall unsafe "rawSystem"
774 c_rawSystem :: CString -> IO Int
781 %************************************************************************
783 \subsection{Path names}
785 %************************************************************************
787 We maintain path names in Unix form ('/'-separated) right until
788 the last moment. On Windows we dos-ify them just before passing them
789 to the Windows command.
791 The alternative, of using '/' consistently on Unix and '\' on Windows,
792 proved quite awkward. There were a lot more calls to platformPath,
793 and even on Windows we might invoke a unix-like utility (eg 'sh'), which
794 interpreted a command line 'foo\baz' as 'foobaz'.
797 -----------------------------------------------------------------------------
798 -- Convert filepath into platform / MSDOS form.
800 -- platformPath does two things
801 -- a) change '/' to '\'
802 -- b) remove initial '/cygdrive/'
804 normalisePath :: String -> String
805 -- Just change '\' to '/'
807 pgmPath :: String -- Directory string in Unix format
808 -> String -- Program name with no directory separators
810 -> String -- Program invocation string in native format
814 #if defined(mingw32_HOST_OS)
815 --------------------- Windows version ------------------
816 normalisePath xs = subst '\\' '/' xs
817 platformPath p = subst '/' '\\' p
818 pgmPath dir pgm = platformPath dir ++ '\\' : pgm
820 subst a b ls = map (\ x -> if x == a then b else x) ls
822 --------------------- Non-Windows version --------------
823 normalisePath xs = xs
824 pgmPath dir pgm = dir ++ '/' : pgm
825 platformPath stuff = stuff
826 --------------------------------------------------------
832 -----------------------------------------------------------------------------
833 Path name construction
836 slash :: String -> String -> String
837 absPath, relPath :: [String] -> String
840 relPath xs = foldr1 slash xs
842 absPath xs = "" `slash` relPath xs
844 slash s1 s2 = s1 ++ ('/' : s2)
848 %************************************************************************
850 \subsection{Support code}
852 %************************************************************************
855 -----------------------------------------------------------------------------
856 -- Define getBaseDir :: IO (Maybe String)
858 #if defined(mingw32_HOST_OS)
859 getBaseDir :: IO (Maybe String)
860 -- Assuming we are running ghc, accessed by path $()/bin/ghc.exe,
861 -- return the path $(stuff). Note that we drop the "bin/" directory too.
862 getBaseDir = do let len = (2048::Int) -- plenty, PATH_MAX is 512 under Win32.
863 buf <- mallocArray len
864 ret <- getModuleFileName nullPtr buf len
865 if ret == 0 then free buf >> return Nothing
866 else do s <- peekCString buf
868 return (Just (rootDir s))
870 rootDir s = reverse (dropList "/bin/ghc.exe" (reverse (normalisePath s)))
872 foreign import stdcall "GetModuleFileNameA" unsafe
873 getModuleFileName :: Ptr () -> CString -> Int -> IO Int32
875 getBaseDir :: IO (Maybe String) = do return Nothing
878 #ifdef mingw32_HOST_OS
879 foreign import ccall "_getpid" unsafe getProcessID :: IO Int -- relies on Int == Int32 on Windows
880 #elif __GLASGOW_HASKELL__ > 504
881 getProcessID :: IO Int
882 getProcessID = System.Posix.Internals.c_getpid >>= return . fromIntegral
884 getProcessID :: IO Int
885 getProcessID = Posix.getProcessID