Merge branch 'maint'

[git.git] / compat / mingw.c

diff --git a/compat/mingw.c b/compat/mingw.c
index f2d9e1fd974b7271366da09370e10fafd2c50f08..6590f33cc8157f61ff7b6e0f6330bacf465ad39c 100644 (file)
--- a/compat/mingw.c
+++ b/compat/mingw.c
@@ -127,7 +127,7 @@ int mingw_open (const char *filename, int oflags, ...)
        mode = va_arg(args, int);
        va_end(args);
 
-       if (!strcmp(filename, "/dev/null"))
+       if (filename && !strcmp(filename, "/dev/null"))
                filename = "nul";
 
        fd = open(filename, oflags, mode);
@@ -160,7 +160,7 @@ ssize_t mingw_write(int fd, const void *buf, size_t count)
 #undef fopen
 FILE *mingw_fopen (const char *filename, const char *otype)
 {
-       if (!strcmp(filename, "/dev/null"))
+       if (filename && !strcmp(filename, "/dev/null"))
                filename = "nul";
        return fopen(filename, otype);
 }
@@ -192,8 +192,11 @@ static inline time_t filetime_to_time_t(const FILETIME *ft)
 /* 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.
+ *
+ * If follow is true then act like stat() and report on the link
+ * target. Otherwise report on the link itself.
  */
-static int do_lstat(const char *file_name, struct stat *buf)
+static int do_lstat(int follow, const char *file_name, struct stat *buf)
 {
        WIN32_FILE_ATTRIBUTE_DATA fdata;
 
@@ -209,6 +212,25 @@ static int do_lstat(const char *file_name, struct stat *buf)
                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));
+               if (fdata.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) {
+                       WIN32_FIND_DATAA findbuf;
+                       HANDLE handle = FindFirstFileA(file_name, &findbuf);
+                       if (handle != INVALID_HANDLE_VALUE) {
+                               if ((findbuf.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) &&
+                                               (findbuf.dwReserved0 == IO_REPARSE_TAG_SYMLINK)) {
+                                       if (follow) {
+                                               char buffer[MAXIMUM_REPARSE_DATA_BUFFER_SIZE];
+                                               buf->st_size = readlink(file_name, buffer, MAXIMUM_REPARSE_DATA_BUFFER_SIZE);
+                                       } else {
+                                               buf->st_mode = S_IFLNK;
+                                       }
+                                       buf->st_mode |= S_IREAD;
+                                       if (!(findbuf.dwFileAttributes & FILE_ATTRIBUTE_READONLY))
+                                               buf->st_mode |= S_IWRITE;
+                               }
+                               FindClose(handle);
+                       }
+               }
                return 0;
        }
        return -1;
@@ -220,12 +242,12 @@ static int do_lstat(const char *file_name, struct stat *buf)
  * complete. Note that Git stat()s are redirected to mingw_lstat()
  * too, since Windows doesn't really handle symlinks that well.
  */
-int mingw_lstat(const char *file_name, struct stat *buf)
+static int do_stat_internal(int follow, const char *file_name, struct stat *buf)
 {
        int namelen;
        static char alt_name[PATH_MAX];
 
-       if (!do_lstat(file_name, buf))
+       if (!do_lstat(follow, file_name, buf))
                return 0;
 
        /* if file_name ended in a '/', Windows returned ENOENT;
@@ -244,7 +266,16 @@ int mingw_lstat(const char *file_name, struct stat *buf)
 
        memcpy(alt_name, file_name, namelen);
        alt_name[namelen] = 0;
-       return do_lstat(alt_name, buf);
+       return do_lstat(follow, alt_name, buf);
+}
+
+int mingw_lstat(const char *file_name, struct stat *buf)
+{
+       return do_stat_internal(0, file_name, buf);
+}
+int mingw_stat(const char *file_name, struct stat *buf)
+{
+       return do_stat_internal(1, file_name, buf);
 }
 
 #undef fstat
@@ -873,6 +904,11 @@ void mingw_execvp(const char *cmd, char *const *argv)
        free_path_split(path);
 }
 
+void mingw_execv(const char *cmd, char *const *argv)
+{
+       mingw_execve(cmd, argv, environ);
+}
+
 static char **copy_environ(void)
 {
        char **env;
@@ -1386,6 +1422,7 @@ void mingw_open_html(const char *unixpath)
                        const char *, const char *, const char *, INT);
        T ShellExecute;
        HMODULE shell32;
+       int r;
 
        shell32 = LoadLibrary("shell32.dll");
        if (!shell32)
@@ -1395,9 +1432,12 @@ void mingw_open_html(const char *unixpath)
                die("cannot run browser");
 
        printf("Launching default browser to display HTML ...\n");
-       ShellExecute(NULL, "open", htmlpath, NULL, "\\", 0);
-
+       r = (int)ShellExecute(NULL, "open", htmlpath, NULL, "\\", SW_SHOWNORMAL);
        FreeLibrary(shell32);
+       /* see the MSDN documentation referring to the result codes here */
+       if (r <= 32) {
+               die("failed to launch browser for %.*s", MAX_PATH, unixpath);
+       }
 }
 
 int link(const char *oldpath, const char *newpath)