Windows: Handle absolute paths in safe_create_leading_directories().

In this function we must be careful to handle drive-local paths else there
is a danger that it runs into an infinite loop.

Signed-off-by: Johannes Sixt <johannes.sixt@telecom.at>

diff --git a/sha1_file.c b/sha1_file.c
index 6f004ffd09ac91912e2c84cdede2b6e7e3122b2b..0a54eed761f6836d48eb28dd160e94a779a4bfba 100644 (file)
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -83,14 +83,18 @@ int get_sha1_hex(const char *hex, unsigned char *sha1)
        return 0;
 }
 
        return 0;
 }
 

+static inline int offset_1st_component(const char *path)
+{
+       if (has_dos_drive_prefix(path))
+               return 2 + (path[2] == '/');
+       return *path == '/';
+}
+

 int safe_create_leading_directories(char *path)
 {
 int safe_create_leading_directories(char *path)
 {

-       char *pos = path;
+       char *pos = path + offset_1st_component(path);

        struct stat st;
 
        struct stat st;
 

-       if (is_absolute_path(path))
-               pos++;
-

        while (pos) {
                pos = strchr(pos, '/');
                if (!pos)
        while (pos) {
                pos = strchr(pos, '/');
                if (!pos)