apply: reject input that touches outside the working area

[git.git] / path.c

diff --git a/path.c b/path.c
index 24594c41120bebab1e04f5bc4bd8fc484ea71b97..4ef1b01e05bc1b32d337d13a1b654e4993ea0456 100644 (file)
--- a/path.c
+++ b/path.c
@@ -830,3 +830,36 @@ int offset_1st_component(const char *path)
                return 2 + is_dir_sep(path[2]);
        return is_dir_sep(path[0]);
 }
+
+static int only_spaces_and_periods(const char *path, size_t len, size_t skip)
+{
+       if (len < skip)
+               return 0;
+       len -= skip;
+       path += skip;
+       while (len-- > 0) {
+               char c = *(path++);
+               if (c != ' ' && c != '.')
+                       return 0;
+       }
+       return 1;
+}
+
+int is_ntfs_dotgit(const char *name)
+{
+       int len;
+
+       for (len = 0; ; len++)
+               if (!name[len] || name[len] == '\\' || is_dir_sep(name[len])) {
+                       if (only_spaces_and_periods(name, len, 4) &&
+                                       !strncasecmp(name, ".git", 4))
+                               return 1;
+                       if (only_spaces_and_periods(name, len, 5) &&
+                                       !strncasecmp(name, "git~1", 5))
+                               return 1;
+                       if (name[len] != '\\')
+                               return 0;
+                       name += len + 1;
+                       len = -1;
+               }
+}