Fix building, installing, and testing extensions on MS-Windows.

 test/Makefile.in (mpfr-tests, shlib-tests): Add a blank character
 between ' and /FOO/ in Gawk command lines, for the benefit of
 testing under MSYS Bash.
 test/filefuncs.awk (BEGIN): Call 'stat' on gawkapi.o, not on gawk,
 which does not exist on systems that produce gawk.exe.

 README_D/README.pc: Update the pc build and test instructions.

 pc/Makefile.tst (AWK): Set AWKLIBPATH so extensions could be found.
 (LS): New variable.
 (check): Add back shlib-tests and shlib-msg-end.
 (readdir): Add a warning regarding inode reporting by ls.exe.
 (fts, fork, fork2): Add message about expected failure on MinGW.
 pc/Makefile (install): Install the extensions.
 (install-strip): Likewise.
 pc/Makefile.ext: New file.

 io.c (devopen) [__EMX__ || __MINGW32__]: Produce EISDIR on MinGW
 when an attempt to open() a directory fails.
 (two_way_open) [__EMX__ || __MINGW32__]: When trying to open() a
 directory fails with EISDIR, assign FAKE_FD_VALUE to the file
 descriptor and attributes of a directory to its mode bits.  This
 is needed to support the readdir extension.
 gawkapi.h (FAKE_FD_VALUE): New macro, used in io.h and in
 extension/gawkdirfd.h.

 extension/rwarray.c [__MINGW32__]: Include winsock2.h instead of
 arpa/inet.h.
 extension/readdir.c [__MINGW32__]: Include windows.h.
 Include gawkapi.h before gawkdirfd.h, since the former defines
 FAKE_FD_VALUE needed by the latter.
 (ftype): Accept an additional argument, the directory that is
 being read.  Callers changed.
 [!DT_BLK]: Produce the file's type by calling 'stat' on it, if the
 dirent structure doesn't provide that.
 (get_inode): New function, to produce inode values on MS-Windows.
 (dir_get_record): Use it.
 extension/inplace.c (chown, link) [__MINGW32__]: Redirect to existing
 library functions.
 (mkstemp) [__MINGW32__]: New function, for MinGW, which doesn't
 have it in its library.
 (do_inplace_end) [__MINGW32__]: Remove the old file before
 renaming the new, since 'rename' on Windows cannot overwrite
 existing files.
 extension/gawkdirfd.h (ENOTSUP): Define to ENOSYS if not already defined.
 (DIR_TO_FD): If not defined yet, define to FAKE_FD_VALUE.
 extension/filefuncs.c (get_inode) [_WIN32]: New function, produces the
 file index used on Windows as its inode.
 (fill_stat_array) [_WIN32]: Use it.

1 files changed, 9 insertions, 2 deletions

diff --git a/io.c b/io.c
index 7e3626bf..6024c4f9 100644
--- a/io.c
+++ b/io.c
@@ -1625,9 +1625,10 @@ devopen(const char *name, const char *mode)
 strictopen:
 	if (openfd == INVALID_HANDLE)
 		openfd = open(name, flag, 0666);
-#ifdef __EMX__
+#if defined(__EMX__) || defined(__MINGW32__)
 	if (openfd == INVALID_HANDLE && errno == EACCES) {
-		/* on OS/2 directory access via open() is not permitted */
+		/* On OS/2 and Windows directory access via open() is
+		   not permitted.  */
 		struct stat buf;
 
 		if (stat(name, & buf) == 0 && S_ISDIR(buf.st_mode))
@@ -2883,6 +2884,12 @@ iop_alloc(int fd, const char *name, int errno_val)
 
 	if (fd != INVALID_HANDLE)
 		fstat(fd, & iop->public.sbuf);
+#if defined(__EMX__) || defined(__MINGW32__)
+	else if (errno_val == EISDIR) {
+		iop->public.sbuf.st_mode = (_S_IFDIR | _S_IRWXU);
+		iop->public.fd = FAKE_FD_VALUE;
+	}
+#endif
 
 	return iop;
 }