clean-temp: Add support for temporary files with unpredictable names.

* lib/clean-temp.h (gen_register_open_temp): New declaration.
* lib/clean-temp.c: Include tempname.h.
(gen_register_open_temp): New function.
* modules/tempname (configure.ac): Define a module indicator.

1 files changed, 13 insertions, 4 deletions

diff --git a/lib/clean-temp.h b/lib/clean-temp.h
index c828d72e58..087db452d1 100644
--- a/lib/clean-temp.h
+++ b/lib/clean-temp.h
@@ -150,26 +150,35 @@ extern int open_temp (const char *file_name, int flags, mode_t mode,
 extern FILE * fopen_temp (const char *file_name, const char *mode,
                           bool delete_on_close);
 
+/* Open a temporary file, generating its name based on FILE_NAME_TMPL.
+   FILE_NAME_TMPL must match the rules for mk[s]temp (i.e. end in "XXXXXX",
+   possibly with a suffix).  The name constructed does not exist at the time
+   of the call.  FILE_NAME_TMPL is overwritten with the result.
+   Registers the file for deletion.
+   Opens the file, with the given FLAGS and mode 0600.
+   Registers the resulting file descriptor to be closed.  */
+extern int gen_register_open_temp (char *file_name_tmpl, int suffixlen, int flags);
+
 /* Close a temporary file.
-   FD must have been returned by open_temp.
+   FD must have been returned by open_temp or gen_register_open_temp.
    Unregisters the previously registered file descriptor.  */
 extern int close_temp (int fd);
 
 /* Close a temporary file.
    FP must have been returned by fopen_temp, or by fdopen on a file descriptor
-   returned by open_temp.
+   returned by open_temp or gen_register_open_temp.
    Unregisters the previously registered file descriptor.  */
 extern int fclose_temp (FILE *fp);
 
 /* Like fwriteerror.
    FP must have been returned by fopen_temp, or by fdopen on a file descriptor
-   returned by open_temp.
+   returned by open_temp or gen_register_open_temp.
    Unregisters the previously registered file descriptor.  */
 extern int fwriteerror_temp (FILE *fp);
 
 /* Like close_stream.
    FP must have been returned by fopen_temp, or by fdopen on a file descriptor
-   returned by open_temp.
+   returned by open_temp or gen_register_open_temp.
    Unregisters the previously registered file descriptor.  */
 extern int close_stream_temp (FILE *fp);