copy-file: add error-code-returning variant.

[gnulib.git] / lib / copy-file.h

diff --git a/lib/copy-file.h b/lib/copy-file.h
index b28ea37..5a8f918 100644 (file)
--- a/lib/copy-file.h
+++ b/lib/copy-file.h
@@ -21,6 +21,26 @@ extern "C" {
 #endif
 
 
+/* Error codes returned by qcopy_file_preserving.  */
+enum
+{
+  GL_COPY_ERR_OPEN_READ = -1,
+  GL_COPY_ERR_OPEN_BACKUP_WRITE = -2,
+  GL_COPY_ERR_READ = -3,
+  GL_COPY_ERR_WRITE = -4,
+  GL_COPY_ERR_AFTER_READ = -5,
+  GL_COPY_ERR_GET_ACL = -6,
+  GL_COPY_ERR_SET_ACL = -7
+};
+
+/* Copy a regular file: from src_filename to dest_filename.
+   The destination file is assumed to be a backup file.
+   Modification times, owner, group and access permissions are preserved as
+   far as possible.
+   Return 0 if successful, otherwise set errno and return one of the error
+   codes above.  */
+extern int qcopy_file_preserving (const char *src_filename, const char *dest_filename);
+
 /* Copy a regular file: from src_filename to dest_filename.
    The destination file is assumed to be a backup file.
    Modification times, owner, group and access permissions are preserved as