Drop 'fr' parameter from sandbox code.

Appearently, the majority of the filenames we pass to
sandbox_cfg_allow() functions are "freeable right after". So, consider
_all_ of them safe-to-steal, and add a tor_strdup() in the few cases
that aren't.

(Maybe buggy; revise when I can test.)

1 files changed, 18 insertions, 35 deletions

diff --git a/src/common/sandbox.h b/src/common/sandbox.h
index b15f31cc4..8fcd221ef 100644
--- a/src/common/sandbox.h
+++ b/src/common/sandbox.h
@@ -171,12 +171,10 @@ sandbox_cfg_t * sandbox_cfg_new(void);
 
 /**
  * Function used to add a open allowed filename to a supplied configuration.
- * The (char*) specifies the path to the allowed file, fr = 1 tells the
- * function that the char* needs to be free-ed, 0 means the pointer does not
- * need to be free-ed.
+ * The (char*) specifies the path to the allowed file; we take ownership
+ * of the pointer.
  */
-int sandbox_cfg_allow_open_filename(sandbox_cfg_t **cfg, char *file,
-    int fr);
+int sandbox_cfg_allow_open_filename(sandbox_cfg_t **cfg, char *file);
 
 /**DOCDOC*/
 int sandbox_cfg_allow_rename(sandbox_cfg_t **cfg, char *file1, char *file2);
@@ -184,66 +182,51 @@ int sandbox_cfg_allow_rename(sandbox_cfg_t **cfg, char *file1, char *file2);
 /** Function used to add a series of open allowed filenames to a supplied
  * configuration.
  *  @param cfg  sandbox configuration.
- *  @param ... all future parameters are specified as pairs of <(char*), 1 / 0>
- *    the char* specifies the path to the allowed file, 1 tells the function
- *    that the char* needs to be free-ed, 0 means the pointer does not need to
- *    be free-ed; the final parameter needs to be <NULL, 0>.
- */
+ *  @param ... a list of stealable pointers to permitted files.  The last
+ *  one must be NULL.
+*/
 int sandbox_cfg_allow_open_filename_array(sandbox_cfg_t **cfg, ...);
 
 /**
  * Function used to add a openat allowed filename to a supplied configuration.
- * The (char*) specifies the path to the allowed file, fr = 1 tells the
- * function that the char* needs to be free-ed, 0 means the pointer does not
- * need to be free-ed.
+ * The (char*) specifies the path to the allowed file; we steal the pointer to
+ * that file.
  */
-int sandbox_cfg_allow_openat_filename(sandbox_cfg_t **cfg, char *file,
-    int fr);
+int sandbox_cfg_allow_openat_filename(sandbox_cfg_t **cfg, char *file);
 
 /** Function used to add a series of openat allowed filenames to a supplied
  * configuration.
  *  @param cfg  sandbox configuration.
- *  @param ... all future parameters are specified as pairs of <(char*), 1 / 0>
- *    the char* specifies the path to the allowed file, 1 tells the function
- *    that the char* needs to be free-ed, 0 means the pointer does not need to
- *    be free-ed; the final parameter needs to be <NULL, 0>.
+ *  @param ... a list of stealable pointers to permitted files.  The last
+ *  one must be NULL.
  */
 int sandbox_cfg_allow_openat_filename_array(sandbox_cfg_t **cfg, ...);
 
 /**
  * Function used to add a execve allowed filename to a supplied configuration.
- * The (char*) specifies the path to the allowed file, fr = 1 tells the
- * function that the char* needs to be free-ed, 0 means the pointer does not
- * need to be free-ed.
+ * The (char*) specifies the path to the allowed file; that pointer is stolen.
  */
 int sandbox_cfg_allow_execve(sandbox_cfg_t **cfg, const char *com);
 
 /** Function used to add a series of execve allowed filenames to a supplied
  * configuration.
  *  @param cfg  sandbox configuration.
- *  @param ... all future parameters are specified as pairs of <(char*), 1 / 0>
- *    the char* specifies the path to the allowed file, 1 tells the function
- *    that the char* needs to be free-ed, 0 means the pointer does not need to
- *    be free-ed; the final parameter needs to be <NULL, 0>.
+ *  @param ... an array of stealable pointers to permitted files.  The last
+ *  one must be NULL.
  */
 int sandbox_cfg_allow_execve_array(sandbox_cfg_t **cfg, ...);
 
 /**
  * Function used to add a stat/stat64 allowed filename to a configuration.
- * The (char*) specifies the path to the allowed file, fr = 1 tells the
- * function that the char* needs to be free-ed, 0 means the pointer does not
- * need to be free-ed.
+ * The (char*) specifies the path to the allowed file; that pointer is stolen.
  */
-int sandbox_cfg_allow_stat_filename(sandbox_cfg_t **cfg, char *file,
-    int fr);
+int sandbox_cfg_allow_stat_filename(sandbox_cfg_t **cfg, char *file);
 
 /** Function used to add a series of stat64 allowed filenames to a supplied
  * configuration.
  *  @param cfg  sandbox configuration.
- *  @param ... all future parameters are specified as pairs of <(char*), 1 / 0>
- *    the char* specifies the path to the allowed file, 1 tells the function
- *    that the char* needs to be free-ed, 0 means the pointer does not need to
- *    be free-ed; the final parameter needs to be <NULL, 0>.
+ *  @param ... an array of stealable pointers to permitted files.  The last
+ *  one must be NULL.
  */
 int sandbox_cfg_allow_stat_filename_array(sandbox_cfg_t **cfg, ...);