1 files changed, 41 insertions, 1 deletions
diff --git a/reftable/system.h b/reftable/system.h
index 38d3534620..858189fd55 100644
--- a/reftable/system.h
+++ b/reftable/system.h
@@ -13,6 +13,46 @@ https://developers.google.com/open-source/licenses/bsd
 
 #include "git-compat-util.h"
 #include "lockfile.h"
-#include "tempfile.h"
+
+/*
+ * An implementation-specific temporary file. By making this specific to the
+ * implementation it becomes possible to tie temporary files into any kind of
+ * signal or atexit handlers for cleanup on abnormal situations.
+ */
+struct reftable_tmpfile {
+	const char *path;
+	int fd;
+	void *priv;
+};
+#define REFTABLE_TMPFILE_INIT ((struct reftable_tmpfile) { .fd = -1, })
+
+/*
+ * Create a temporary file from a pattern similar to how mkstemp(3p) would.
+ * The `pattern` shall not be modified. On success, the structure at `out` has
+ * been initialized such that it is ready for use. Returns 0 on success, a
+ * reftable error code on error.
+ */
+int tmpfile_from_pattern(struct reftable_tmpfile *out, const char *pattern);
+
+/*
+ * Close the temporary file's file descriptor without removing the file itself.
+ * This is a no-op in case the file has already been closed beforehand. Returns
+ * 0 on success, a reftable error code on error.
+ */
+int tmpfile_close(struct reftable_tmpfile *t);
+
+/*
+ * Close the temporary file and delete it. This is a no-op in case the file has
+ * already been deleted or renamed beforehand. Returns 0 on success, a reftable
+ * error code on error.
+ */
+int tmpfile_delete(struct reftable_tmpfile *t);
+
+/*
+ * Rename the temporary file to the provided path. The temporary file must be
+ * active. Return 0 on success, a reftable error code on error. Deactivates the
+ * temporary file.
+ */
+int tmpfile_rename(struct reftable_tmpfile *t, const char *path);
 
 #endif