Documentation: add a FILES section for show-ref

diff --git a/wrapper.c b/wrapper.c
index 62edb57338ccd1ae56b86649ec07d88c251576da..afb4f6f773a3ed909433778f4b4da3740ded2b18 100644 (file)
--- a/wrapper.c
+++ b/wrapper.c
@@ -10,9 +10,11 @@ static void try_to_free_builtin(size_t size)
 
 static void (*try_to_free_routine)(size_t size) = try_to_free_builtin;
 
-void set_try_to_free_routine(void (*routine)(size_t))
+try_to_free_t set_try_to_free_routine(try_to_free_t routine)
 {
-       try_to_free_routine = (routine) ? routine : try_to_free_builtin;
+       try_to_free_t old = try_to_free_routine;
+       try_to_free_routine = routine;
+       return old;
 }
 
 char *xstrdup(const char *str)
@@ -323,18 +325,30 @@ int odb_pack_keep(char *name, size_t namesz, unsigned char *sha1)
        return open(name, O_RDWR|O_CREAT|O_EXCL, 0600);
 }
 
-int unlink_or_warn(const char *file)
+static int warn_if_unremovable(const char *op, const char *file, int rc)
 {
-       int rc = unlink(file);
-
        if (rc < 0) {
                int err = errno;
                if (ENOENT != err) {
-                       warning("unable to unlink %s: %s",
-                               file, strerror(errno));
+                       warning("unable to %s %s: %s",
+                               op, file, strerror(errno));
                        errno = err;
                }
        }
        return rc;
 }
 
+int unlink_or_warn(const char *file)
+{
+       return warn_if_unremovable("unlink", file, unlink(file));
+}
+
+int rmdir_or_warn(const char *file)
+{
+       return warn_if_unremovable("rmdir", file, rmdir(file));
+}
+
+int remove_or_warn(unsigned int mode, const char *file)
+{
+       return S_ISGITLINK(mode) ? rmdir_or_warn(file) : unlink_or_warn(file);
+}