Replace `__hsunix_getpw{nam,uid_r}` wrappers with CApiFFI

System/Posix/User.hsc

@@ -53,7 +53,6 @@ import Foreign.C
 import Foreign.Ptr
 import Foreign.Marshal
 import Foreign.Storable
-import System.Posix.Internals   ( CGroup, CPasswd )
 
 #if !defined(HAVE_GETPWNAM_R) || !defined(HAVE_GETPWUID_R) || defined(HAVE_GETPWENT) || defined(HAVE_GETGRENT)
 import Control.Concurrent.MVar  ( MVar, newMVar, withMVar )
@@ -64,6 +63,10 @@ import Control.Exception
 import Control.Monad
 import System.IO.Error
 
+-- internal types
+data {-# CTYPE "struct passwd" #-} CPasswd
+data {-# CTYPE "struct group"  #-} CGroup
+
 -- -----------------------------------------------------------------------------
 -- user environemnt
 
@@ -318,7 +321,7 @@ getUserEntryForID uid =
     doubleAllocWhileERANGE "getUserEntryForID" "user" pwBufSize unpackUserEntry $
       c_getpwuid_r uid ppw
 
-foreign import ccall unsafe "__hsunix_getpwuid_r"
+foreign import capi unsafe "HsUnix.h getpwuid_r"
   c_getpwuid_r :: CUid -> Ptr CPasswd ->
                         CString -> CSize -> Ptr (Ptr CPasswd) -> IO CInt
 #elif HAVE_GETPWUID
@@ -345,7 +348,7 @@ getUserEntryForName name =
       doubleAllocWhileERANGE "getUserEntryForName" "user" pwBufSize unpackUserEntry $
         c_getpwnam_r pstr ppw
 
-foreign import ccall unsafe "__hsunix_getpwnam_r"
+foreign import capi unsafe "HsUnix.h getpwnam_r"
   c_getpwnam_r :: CString -> Ptr CPasswd
                -> CString -> CSize -> Ptr (Ptr CPasswd) -> IO CInt
 #elif HAVE_GETPWNAM

cbits/HsUnix.c

@@ -16,24 +16,6 @@ void *__hsunix_rtldNext (void) {return RTLD_NEXT;}
 void *__hsunix_rtldDefault (void) {return RTLD_DEFAULT;}
 #endif
 
-#if HAVE_GETPWNAM_R
-// getpwnam_r is a macro on some platforms, so we need a wrapper:
-int __hsunix_getpwnam_r(const char *name, struct passwd *pw, char *buffer,
-                        size_t buflen, struct passwd **result)
-{
-    return getpwnam_r(name, pw, buffer, buflen, result);
-}
-#endif
-
-#ifdef HAVE_GETPWUID_R
-// getpwuid_r is a macro on some platforms, so we need a wrapper:
-int __hsunix_getpwuid_r(uid_t uid, struct passwd *pw, char *buffer,
-                        size_t buflen, struct passwd **result)
-{
-    return getpwuid_r(uid, pw, buffer, buflen, result);
-}
-#endif
-
 #ifdef HAVE_PTSNAME
 // On Linux (and others), <stdlib.h> needs to be included while
 // `_XOPEN_SOURCE` is already defined. However, GHCs before GHC 8.0

include/HsUnix.h

@@ -113,18 +113,6 @@ fall back to O_FSYNC, which should be the same */
 # define WCOREDUMP(s) 0
 #endif
 
-#if HAVE_GETPWNAM_R
-// getpwnam_r is a macro on some platforms, so we need a wrapper:
-int __hsunix_getpwnam_r(const char *, struct passwd *, char *, size_t,
-                        struct passwd **);
-#endif
-
-#ifdef HAVE_GETPWUID_R
-// getpwuid_r is a macro on some platforms, so we need a wrapper:
-int __hsunix_getpwuid_r(uid_t, struct passwd *, char *, size_t,
-                        struct passwd **);
-#endif
-
 #ifdef HAVE_PTSNAME
 char *__hsunix_ptsname(int fd);
 int __hsunix_grantpt(int fd);