lstat_cache(): print a warning if doing ping-pong between cache types

diff --git a/compat/mingw.c b/compat/mingw.c
index ccfa2a0a3d3263862beb0d2796be1aba78574986..3dbe6a77ffa4675b19e7183fd49e11212cb2cda0 100644 (file)
--- a/compat/mingw.c
+++ b/compat/mingw.c
@@ -1,4 +1,5 @@
 #include "../git-compat-util.h"
+#include "win32.h"
 #include "../strbuf.h"
 
 unsigned int _CRT_fmode = _O_BINARY;
@@ -31,7 +32,6 @@ static inline time_t filetime_to_time_t(const FILETIME *ft)
        return (time_t)winTime;
 }
 
-extern int _getdrive( void );
 /* We keep the do_lstat code in a separate function to avoid recursion.
  * When a path ends with a slash, the stat will fail with ENOENT. In
  * this case, we strip the trailing slashes and stat again.
@@ -40,46 +40,19 @@ static int do_lstat(const char *file_name, struct stat *buf)
 {
        WIN32_FILE_ATTRIBUTE_DATA fdata;
 
-       if (GetFileAttributesExA(file_name, GetFileExInfoStandard, &fdata)) {
-               int fMode = S_IREAD;
-               if (fdata.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
-                       fMode |= S_IFDIR;
-               else
-                       fMode |= S_IFREG;
-               if (!(fdata.dwFileAttributes & FILE_ATTRIBUTE_READONLY))
-                       fMode |= S_IWRITE;
-
+       if (!(errno = get_file_attr(file_name, &fdata))) {
                buf->st_ino = 0;
                buf->st_gid = 0;
                buf->st_uid = 0;
                buf->st_nlink = 1;
-               buf->st_mode = fMode;
+               buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
                buf->st_size = fdata.nFileSizeLow; /* Can't use nFileSizeHigh, since it's not a stat64 */
-               buf->st_dev = buf->st_rdev = (_getdrive() - 1);
+               buf->st_dev = buf->st_rdev = 0; /* not used by Git */
                buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
                buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
                buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
-               errno = 0;
                return 0;
        }
-
-       switch (GetLastError()) {
-       case ERROR_ACCESS_DENIED:
-       case ERROR_SHARING_VIOLATION:
-       case ERROR_LOCK_VIOLATION:
-       case ERROR_SHARING_BUFFER_EXCEEDED:
-               errno = EACCES;
-               break;
-       case ERROR_BUFFER_OVERFLOW:
-               errno = ENAMETOOLONG;
-               break;
-       case ERROR_NOT_ENOUGH_MEMORY:
-               errno = ENOMEM;
-               break;
-       default:
-               errno = ENOENT;
-               break;
-       }
        return -1;
 }
 
@@ -131,21 +104,13 @@ int mingw_fstat(int fd, struct stat *buf)
                return fstat(fd, buf);
 
        if (GetFileInformationByHandle(fh, &fdata)) {
-               int fMode = S_IREAD;
-               if (fdata.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
-                       fMode |= S_IFDIR;
-               else
-                       fMode |= S_IFREG;
-               if (!(fdata.dwFileAttributes & FILE_ATTRIBUTE_READONLY))
-                       fMode |= S_IWRITE;
-
                buf->st_ino = 0;
                buf->st_gid = 0;
                buf->st_uid = 0;
                buf->st_nlink = 1;
-               buf->st_mode = fMode;
+               buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
                buf->st_size = fdata.nFileSizeLow; /* Can't use nFileSizeHigh, since it's not a stat64 */
-               buf->st_dev = buf->st_rdev = (_getdrive() - 1);
+               buf->st_dev = buf->st_rdev = 0; /* not used by Git */
                buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
                buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
                buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
@@ -263,8 +228,13 @@ int poll(struct pollfd *ufds, unsigned int nfds, int timeout)
 {
        int i, pending;
 
-       if (timeout != -1)
+       if (timeout >= 0) {
+               if (nfds == 0) {
+                       Sleep(timeout);
+                       return 0;
+               }
                return errno = EINVAL, error("poll timeout not supported");
+       }
 
        /* When there is only one fd to wait for, then we pretend that
         * input is available and let the actual wait happen when the
@@ -566,12 +536,16 @@ static pid_t mingw_spawnve(const char *cmd, const char **argv, char **env,
                 * would normally create a console window. But
                 * since we'll be redirecting std streams, we do
                 * not need the console.
+                * It is necessary to use DETACHED_PROCESS
+                * instead of CREATE_NO_WINDOW to make ssh
+                * recognize that it has no console.
                 */
-               flags = CREATE_NO_WINDOW;
+               flags = DETACHED_PROCESS;
        } else {
                /* There is already a console. If we specified
-                * CREATE_NO_WINDOW here, too, Windows would
+                * DETACHED_PROCESS here, too, Windows would
                 * disassociate the child from the console.
+                * The same is true for CREATE_NO_WINDOW.
                 * Go figure!
                 */
                flags = 0;
@@ -845,6 +819,8 @@ int mingw_connect(int sockfd, struct sockaddr *sa, size_t sz)
 #undef rename
 int mingw_rename(const char *pold, const char *pnew)
 {
+       DWORD attrs;
+
        /*
         * Try native rename() first to get errno right.
         * It is based on MoveFile(), which cannot overwrite existing files.
@@ -856,12 +832,19 @@ int mingw_rename(const char *pold, const char *pnew)
        if (MoveFileEx(pold, pnew, MOVEFILE_REPLACE_EXISTING))
                return 0;
        /* TODO: translate more errors */
-       if (GetLastError() == ERROR_ACCESS_DENIED) {
-               DWORD attrs = GetFileAttributes(pnew);
-               if (attrs != INVALID_FILE_ATTRIBUTES && (attrs & FILE_ATTRIBUTE_DIRECTORY)) {
+       if (GetLastError() == ERROR_ACCESS_DENIED &&
+           (attrs = GetFileAttributes(pnew)) != INVALID_FILE_ATTRIBUTES) {
+               if (attrs & FILE_ATTRIBUTE_DIRECTORY) {
                        errno = EISDIR;
                        return -1;
                }
+               if ((attrs & FILE_ATTRIBUTE_READONLY) &&
+                   SetFileAttributes(pnew, attrs & ~FILE_ATTRIBUTE_READONLY)) {
+                       if (MoveFileEx(pold, pnew, MOVEFILE_REPLACE_EXISTING))
+                               return 0;
+                       /* revert file attributes on failure */
+                       SetFileAttributes(pnew, attrs);
+               }
        }
        errno = EACCES;
        return -1;