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win32: use our own dirent.h

The mingw-runtime implemenation of opendir, readdir and closedir
sets errno to 0 on success, something that POSIX explicitly
forbids. 3ba7a06 ("A loose object is not corrupt if it cannot be
read due to EMFILE") introduce a dependency on this behaviour,
leading to a broken "git clone" on Windows.

compat/mingw.c contains an implementation of readdir, and
compat/msvc.c contains implementations of opendir and closedir.

Move these to compat/win32/dirent.[ch], and change to our own DIR
structure at the same time.

This provides a generic Win32-implementation of opendir, readdir
and closedir which works on both MinGW and MSVC and does not reset
errno, and as a result git clone is working again on Windows.

Signed-off-by: Erik Faye-Lund <kusmabite@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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1 parent e777260 commit d1b6e6e015501272c7491b3a4adf3cd3904edefa @kusma kusma committed with gitster Nov 23, 2010
Showing with 137 additions and 271 deletions.
  1. +5 −2 Makefile
  2. +0 −60 compat/mingw.c
  3. +0 −29 compat/mingw.h
  4. +0 −52 compat/msvc.c
  5. +0 −128 compat/vcbuild/include/dirent.h
  6. +108 −0 compat/win32/dirent.c
  7. +24 −0 compat/win32/dirent.h
View
@@ -499,6 +499,7 @@ LIB_H += compat/mingw.h
LIB_H += compat/win32/pthread.h
LIB_H += compat/win32/syslog.h
LIB_H += compat/win32/sys/poll.h
+LIB_H += compat/win32/dirent.h
LIB_H += csum-file.h
LIB_H += decorate.h
LIB_H += delta.h
@@ -1084,7 +1085,9 @@ ifeq ($(uname_S),Windows)
AR = compat/vcbuild/scripts/lib.pl
CFLAGS =
BASIC_CFLAGS = -nologo -I. -I../zlib -Icompat/vcbuild -Icompat/vcbuild/include -DWIN32 -D_CONSOLE -DHAVE_STRING_H -D_CRT_SECURE_NO_WARNINGS -D_CRT_NONSTDC_NO_DEPRECATE
- COMPAT_OBJS = compat/msvc.o compat/fnmatch/fnmatch.o compat/winansi.o compat/win32/pthread.o compat/win32/syslog.o compat/win32/sys/poll.o
+ COMPAT_OBJS = compat/msvc.o compat/fnmatch/fnmatch.o compat/winansi.o \
+ compat/win32/pthread.o compat/win32/syslog.o \
+ compat/win32/sys/poll.o compat/win32/dirent.o
COMPAT_CFLAGS = -D__USE_MINGW_ACCESS -DNOGDI -DHAVE_STRING_H -DHAVE_ALLOCA_H -Icompat -Icompat/fnmatch -Icompat/regex -Icompat/fnmatch -Icompat/win32 -DSTRIP_EXTENSION=\".exe\"
BASIC_LDFLAGS = -IGNORE:4217 -IGNORE:4049 -NOLOGO -SUBSYSTEM:CONSOLE -NODEFAULTLIB:MSVCRT.lib
EXTLIBS = advapi32.lib shell32.lib wininet.lib ws2_32.lib
@@ -1137,7 +1140,7 @@ ifneq (,$(findstring MINGW,$(uname_S)))
COMPAT_CFLAGS += -DSTRIP_EXTENSION=\".exe\"
COMPAT_OBJS += compat/mingw.o compat/fnmatch/fnmatch.o compat/winansi.o \
compat/win32/pthread.o compat/win32/syslog.o \
- compat/win32/sys/poll.o
+ compat/win32/sys/poll.o compat/win32/dirent.o
EXTLIBS += -lws2_32
PTHREAD_LIBS =
X = .exe
View
@@ -1564,63 +1564,3 @@ pid_t waitpid(pid_t pid, int *status, unsigned options)
errno = EINVAL;
return -1;
}
-
-#ifndef NO_MINGW_REPLACE_READDIR
-/* MinGW readdir implementation to avoid extra lstats for Git */
-struct mingw_DIR
-{
- struct _finddata_t dd_dta; /* disk transfer area for this dir */
- struct mingw_dirent dd_dir; /* Our own implementation, including d_type */
- long dd_handle; /* _findnext handle */
- int dd_stat; /* 0 = next entry to read is first entry, -1 = off the end, positive = 0 based index of next entry */
- char dd_name[1]; /* given path for dir with search pattern (struct is extended) */
-};
-
-struct dirent *mingw_readdir(DIR *dir)
-{
- WIN32_FIND_DATAA buf;
- HANDLE handle;
- struct mingw_DIR *mdir = (struct mingw_DIR*)dir;
-
- if (!dir || !dir->dd_handle) {
- errno = EBADF; /* No set_errno for mingw */
- return NULL;
- }
-
- if (dir->dd_handle == (long)INVALID_HANDLE_VALUE && dir->dd_stat == 0)
- {
- DWORD lasterr;
- handle = FindFirstFileA(dir->dd_name, &buf);
- lasterr = GetLastError();
- dir->dd_handle = (long)handle;
- if (handle == INVALID_HANDLE_VALUE && (lasterr != ERROR_NO_MORE_FILES)) {
- errno = err_win_to_posix(lasterr);
- return NULL;
- }
- } else if (dir->dd_handle == (long)INVALID_HANDLE_VALUE) {
- return NULL;
- } else if (!FindNextFileA((HANDLE)dir->dd_handle, &buf)) {
- DWORD lasterr = GetLastError();
- FindClose((HANDLE)dir->dd_handle);
- dir->dd_handle = (long)INVALID_HANDLE_VALUE;
- /* POSIX says you shouldn't set errno when readdir can't
- find any more files; so, if another error we leave it set. */
- if (lasterr != ERROR_NO_MORE_FILES)
- errno = err_win_to_posix(lasterr);
- return NULL;
- }
-
- /* We get here if `buf' contains valid data. */
- strcpy(dir->dd_dir.d_name, buf.cFileName);
- ++dir->dd_stat;
-
- /* Set file type, based on WIN32_FIND_DATA */
- mdir->dd_dir.d_type = 0;
- if (buf.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
- mdir->dd_dir.d_type |= DT_DIR;
- else
- mdir->dd_dir.d_type |= DT_REG;
-
- return (struct dirent*)&dir->dd_dir;
-}
-#endif // !NO_MINGW_REPLACE_READDIR
View
@@ -319,35 +319,6 @@ int main(int argc, const char **argv) \
} \
static int mingw_main(c,v)
-#ifndef NO_MINGW_REPLACE_READDIR
-/*
- * A replacement of readdir, to ensure that it reads the file type at
- * the same time. This avoid extra unneeded lstats in git on MinGW
- */
-#undef DT_UNKNOWN
-#undef DT_DIR
-#undef DT_REG
-#undef DT_LNK
-#define DT_UNKNOWN 0
-#define DT_DIR 1
-#define DT_REG 2
-#define DT_LNK 3
-
-struct mingw_dirent
-{
- long d_ino; /* Always zero. */
- union {
- unsigned short d_reclen; /* Always zero. */
- unsigned char d_type; /* Reimplementation adds this */
- };
- unsigned short d_namlen; /* Length of name in d_name. */
- char d_name[FILENAME_MAX]; /* File name. */
-};
-#define dirent mingw_dirent
-#define readdir(x) mingw_readdir(x)
-struct dirent *mingw_readdir(DIR *dir);
-#endif // !NO_MINGW_REPLACE_READDIR
-
/*
* Used by Pthread API implementation for Windows
*/
View
@@ -3,56 +3,4 @@
#include <conio.h>
#include "../strbuf.h"
-DIR *opendir(const char *name)
-{
- DWORD attrs = GetFileAttributes(name);
- int len;
- DIR *p;
-
- /* check for valid path */
- if (attrs == INVALID_FILE_ATTRIBUTES) {
- errno = ENOENT;
- return NULL;
- }
-
- /* check if it's a directory */
- if (!(attrs & FILE_ATTRIBUTE_DIRECTORY)) {
- errno = ENOTDIR;
- return NULL;
- }
-
- /* check that the pattern won't be too long for FindFirstFileA */
- len = strlen(name);
- if (is_dir_sep(name[len - 1]))
- len--;
- if (len + 2 >= MAX_PATH) {
- errno = ENAMETOOLONG;
- return NULL;
- }
-
- p = malloc(sizeof(DIR) + len + 2);
- if (!p)
- return NULL;
-
- memset(p, 0, sizeof(DIR) + len + 2);
- strcpy(p->dd_name, name);
- p->dd_name[len] = '/';
- p->dd_name[len+1] = '*';
-
- p->dd_handle = (long)INVALID_HANDLE_VALUE;
- return p;
-}
-int closedir(DIR *dir)
-{
- if (!dir) {
- errno = EBADF;
- return -1;
- }
-
- if (dir->dd_handle != (long)INVALID_HANDLE_VALUE)
- FindClose((HANDLE)dir->dd_handle);
- free(dir);
- return 0;
-}
-
#include "mingw.c"
@@ -1,128 +0,0 @@
-/*
- * DIRENT.H (formerly DIRLIB.H)
- * This file has no copyright assigned and is placed in the Public Domain.
- * This file is a part of the mingw-runtime package.
- *
- * The mingw-runtime package and its code is distributed in the hope that it
- * will be useful but WITHOUT ANY WARRANTY. ALL WARRANTIES, EXPRESSED OR
- * IMPLIED ARE HEREBY DISCLAIMED. This includes but is not limited to
- * warranties of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
- *
- * You are free to use this package and its code without limitation.
- */
-#ifndef _DIRENT_H_
-#define _DIRENT_H_
-#include <io.h>
-
-#define PATH_MAX 512
-
-#define __MINGW_NOTHROW
-
-#ifndef RC_INVOKED
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-struct dirent
-{
- long d_ino; /* Always zero. */
- unsigned short d_reclen; /* Always zero. */
- unsigned short d_namlen; /* Length of name in d_name. */
- char d_name[FILENAME_MAX]; /* File name. */
-};
-
-/*
- * This is an internal data structure. Good programmers will not use it
- * except as an argument to one of the functions below.
- * dd_stat field is now int (was short in older versions).
- */
-typedef struct
-{
- /* disk transfer area for this dir */
- struct _finddata_t dd_dta;
-
- /* dirent struct to return from dir (NOTE: this makes this thread
- * safe as long as only one thread uses a particular DIR struct at
- * a time) */
- struct dirent dd_dir;
-
- /* _findnext handle */
- long dd_handle;
-
- /*
- * Status of search:
- * 0 = not started yet (next entry to read is first entry)
- * -1 = off the end
- * positive = 0 based index of next entry
- */
- int dd_stat;
-
- /* given path for dir with search pattern (struct is extended) */
- char dd_name[PATH_MAX+3];
-} DIR;
-
-DIR* __cdecl __MINGW_NOTHROW opendir (const char*);
-struct dirent* __cdecl __MINGW_NOTHROW readdir (DIR*);
-int __cdecl __MINGW_NOTHROW closedir (DIR*);
-void __cdecl __MINGW_NOTHROW rewinddir (DIR*);
-long __cdecl __MINGW_NOTHROW telldir (DIR*);
-void __cdecl __MINGW_NOTHROW seekdir (DIR*, long);
-
-
-/* wide char versions */
-
-struct _wdirent
-{
- long d_ino; /* Always zero. */
- unsigned short d_reclen; /* Always zero. */
- unsigned short d_namlen; /* Length of name in d_name. */
- wchar_t d_name[FILENAME_MAX]; /* File name. */
-};
-
-/*
- * This is an internal data structure. Good programmers will not use it
- * except as an argument to one of the functions below.
- */
-typedef struct
-{
- /* disk transfer area for this dir */
- //struct _wfinddata_t dd_dta;
-
- /* dirent struct to return from dir (NOTE: this makes this thread
- * safe as long as only one thread uses a particular DIR struct at
- * a time) */
- struct _wdirent dd_dir;
-
- /* _findnext handle */
- long dd_handle;
-
- /*
- * Status of search:
- * 0 = not started yet (next entry to read is first entry)
- * -1 = off the end
- * positive = 0 based index of next entry
- */
- int dd_stat;
-
- /* given path for dir with search pattern (struct is extended) */
- wchar_t dd_name[1];
-} _WDIR;
-
-
-
-_WDIR* __cdecl __MINGW_NOTHROW _wopendir (const wchar_t*);
-struct _wdirent* __cdecl __MINGW_NOTHROW _wreaddir (_WDIR*);
-int __cdecl __MINGW_NOTHROW _wclosedir (_WDIR*);
-void __cdecl __MINGW_NOTHROW _wrewinddir (_WDIR*);
-long __cdecl __MINGW_NOTHROW _wtelldir (_WDIR*);
-void __cdecl __MINGW_NOTHROW _wseekdir (_WDIR*, long);
-
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif /* Not RC_INVOKED */
-
-#endif /* Not _DIRENT_H_ */
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