Expose dump_desc() to the test suite and make things it calls mockable

src/common/util.c

@@ -2013,6 +2013,16 @@ clean_name_for_stat(char *name)
 #endif
 }
 
+/** Wrapper for unlink() to make it mockable for the test suite; returns 0
+ * if unlinking the file succeeded, -1 and sets errno if unlinking fails.
+ */
+
+MOCK_IMPL(int,
+tor_unlink,(const char *pathname))
+{
+  return unlink(pathname);
+}
+
 /** Return:
  * FN_ERROR if filename can't be read, is NULL, or is zero-length,
  * FN_NOENT if it doesn't exist,
@@ -2306,8 +2316,8 @@ check_private_dir(const char *dirname, cpd_check_t check,
  * function, and all other functions in util.c that create files, create them
  * with mode 0600.
  */
-int
-write_str_to_file(const char *fname, const char *str, int bin)
+MOCK_IMPL(int,
+write_str_to_file,(const char *fname, const char *str, int bin))
 {
 #ifdef _WIN32
   if (!bin && strchr(str, '\r')) {

src/common/util.h

@@ -309,6 +309,8 @@ const char *stream_status_to_string(enum stream_status stream_status);
 
 enum stream_status get_string_from_pipe(FILE *stream, char *buf, size_t count);
 
+MOCK_DECL(int,tor_unlink,(const char *pathname));
+
 /** Return values from file_status(); see that function's documentation
  * for details. */
 typedef enum { FN_ERROR, FN_NOENT, FN_FILE, FN_DIR, FN_EMPTY } file_status_t;
@@ -338,7 +340,8 @@ FILE *start_writing_to_stdio_file(const char *fname, int open_flags, int mode,
 FILE *fdopen_file(open_file_t *file_data);
 int finish_writing_to_file(open_file_t *file_data);
 int abort_writing_to_file(open_file_t *file_data);
-int write_str_to_file(const char *fname, const char *str, int bin);
+MOCK_DECL(int,
+write_str_to_file,(const char *fname, const char *str, int bin));
 MOCK_DECL(int,
 write_bytes_to_file,(const char *fname, const char *str, size_t len,
                      int bin));

src/or/routerparse.c

@@ -646,7 +646,7 @@ dump_desc_fifo_add_and_clean(char *filename, const uint8_t *digest_sha256,
      */
     if (strcmp(tmp->filename, filename) != 0) {
       /* Delete it and adjust the length counter */
-      unlink(tmp->filename);
+      tor_unlink(tmp->filename);
       tor_assert(len_descs_dumped >= tmp->len);
       len_descs_dumped -= tmp->len;
       log_info(LD_DIR,
@@ -736,7 +736,7 @@ dump_desc_fifo_cleanup(void)
  * type *<b>type</b> to file $DATADIR/unparseable-desc. Do not write more
  * than one descriptor to disk per minute. If there is already such a
  * file in the data directory, overwrite it. */
-static void
+STATIC void
 dump_desc(const char *desc, const char *type)
 {
   tor_assert(desc);

src/or/routerparse.h

@@ -92,6 +92,7 @@ STATIC int routerstatus_parse_guardfraction(const char *guardfraction_str,
                                             networkstatus_t *vote,
                                             vote_routerstatus_t *vote_rs,
                                             routerstatus_t *rs);
+STATIC void dump_desc(const char *desc, const char *type);
 #endif
 
 #define ED_DESC_SIGNATURE_PREFIX "Tor router descriptor signature v1"