mirror of
https://gitlab.torproject.org/tpo/core/tor.git
synced 2024-11-28 06:13:31 +01:00
Support for a defaults torrc file.
This will mainly help distributors by giving a way to set system or package defaults that a user can override, and that a later package can replace. No promises about the particular future location or semantics for this: we will probably want to tweak it some before 0.2.3.x-rc The file is searched for in CONFDIR/torrc-defaults , which can be overridden with the "--defaults-torrc" option on the command line.
This commit is contained in:
Nick Mathewson
parent
73436a1d6f
commit
230422b955
@ -12,7 +12,14 @@
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- You can remove all the values for a "list" option from the command
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line without adding any new ones by prefixing the option name
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with a "/".
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- Add *experimental* support for a "defaults" torrc file to be parsed
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before the regular torrc. Torrc options override the defaults file's
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options in the same way that the command line overrides the torrc.
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The SAVECONF controller command saves only those options which differ
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between the current configuration and the defaults file. HUP reloads
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both files. (Note: This is an experimental feature; its behavior will
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probably be refined in future 0.2.3.x-alpha versions to better meet
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packagers' needs.)
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o Minor bugfixes:
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- Restore behavior of overriding SocksPort, ORPort, and similar
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144
src/or/config.c
144
src/or/config.c
@ -661,8 +661,12 @@ static const config_format_t state_format = {
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/** Command-line and config-file options. */
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static or_options_t *global_options = NULL;
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/** DOCDOC */
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static or_options_t *global_default_options = NULL;
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/** Name of most recently read torrc file. */
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static char *torrc_fname = NULL;
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/** DOCDOC */
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static char *torrc_defaults_fname;
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/** Persistent serialized state. */
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static or_state_t *global_state = NULL;
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/** Configuration Options set by command line. */
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@ -806,6 +810,8 @@ config_free_all(void)
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{
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or_options_free(global_options);
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global_options = NULL;
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or_options_free(global_default_options);
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global_default_options = NULL;
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config_free(&state_format, global_state);
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global_state = NULL;
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@ -821,6 +827,7 @@ config_free_all(void)
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}
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tor_free(torrc_fname);
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tor_free(torrc_defaults_fname);
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tor_free(_version);
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tor_free(global_dirfrontpagecontents);
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}
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@ -1732,6 +1739,7 @@ config_get_commandlines(int argc, char **argv, config_line_t **result)
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int want_arg = 1;
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if (!strcmp(argv[i],"-f") ||
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!strcmp(argv[i],"--defaults-torrc") ||
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!strcmp(argv[i],"--hash-password")) {
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i += 2; /* command-line option with argument. ignore them. */
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continue;
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@ -3020,25 +3028,31 @@ config_init(const config_format_t *fmt, void *options)
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* Else, if comment_defaults, write default values as comments.
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*/
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static char *
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config_dump(const config_format_t *fmt, const void *options, int minimal,
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config_dump(const config_format_t *fmt, const void *default_options,
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const void *options, int minimal,
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int comment_defaults)
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{
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smartlist_t *elements;
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or_options_t *defaults;
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const or_options_t *defaults = default_options;
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void *defaults_tmp = NULL;
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config_line_t *line, *assigned;
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char *result;
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int i;
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char *msg = NULL;
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defaults = config_alloc(fmt);
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config_init(fmt, defaults);
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if (defaults == NULL) {
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defaults = defaults_tmp = config_alloc(fmt);
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config_init(fmt, defaults_tmp);
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}
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/* XXX use a 1 here so we don't add a new log line while dumping */
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if (fmt->validate_fn(NULL,defaults, 1, &msg) < 0) {
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if (default_options == NULL) {
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if (fmt->validate_fn(NULL, defaults_tmp, 1, &msg) < 0) {
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log_err(LD_BUG, "Failed to validate default config.");
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tor_free(msg);
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tor_assert(0);
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}
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}
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elements = smartlist_create();
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for (i=0; fmt->vars[i].name; ++i) {
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@ -3079,7 +3093,8 @@ config_dump(const config_format_t *fmt, const void *options, int minimal,
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result = smartlist_join_strings(elements, "", 0, NULL);
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SMARTLIST_FOREACH(elements, char *, cp, tor_free(cp));
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smartlist_free(elements);
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config_free(fmt, defaults);
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if (defaults_tmp)
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config_free(fmt, defaults_tmp);
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return result;
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}
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@ -3090,7 +3105,8 @@ config_dump(const config_format_t *fmt, const void *options, int minimal,
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char *
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options_dump(const or_options_t *options, int minimal)
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{
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return config_dump(&options_format, options, minimal, 0);
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return config_dump(&options_format, global_default_options,
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options, minimal, 0);
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}
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/** Return 0 if every element of sl is a string holding a decimal
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@ -4244,17 +4260,25 @@ get_windows_conf_root(void)
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}
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#endif
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/** Return the default location for our torrc file. */
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/** Return the default location for our torrc file.
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* DOCDOC defaults_file */
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static const char *
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get_default_conf_file(void)
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get_default_conf_file(int defaults_file)
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{
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#ifdef MS_WINDOWS
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if (defaults_file) {
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static char defaults_path[MAX_PATH+1];
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tor_snprintf(defaults_path, MAX_PATH, "%s\\torrc-defaults",
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get_windows_conf_root());
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return defaults_path;
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} else {
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static char path[MAX_PATH+1];
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strlcpy(path, get_windows_conf_root(), MAX_PATH);
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strlcat(path,"\\torrc",MAX_PATH);
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tor_snprintf(path, MAX_PATH, "%s\\torrc",
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get_windows_conf_root());
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return path;
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}
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#else
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return (CONFDIR "/torrc");
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return defaults_file ? CONFDIR "/torrc-defaults" : CONFDIR "/torrc";
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#endif
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}
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@ -4287,36 +4311,45 @@ check_nickname_list(const char *lst, const char *name, char **msg)
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return r;
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}
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/** Learn config file name from command line arguments, or use the default */
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/** Learn config file name from command line arguments, or use the default,
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* DOCDOC defaults_file */
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static char *
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find_torrc_filename(int argc, char **argv,
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int defaults_file,
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int *using_default_torrc, int *ignore_missing_torrc)
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{
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char *fname=NULL;
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int i;
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const char *fname_opt = defaults_file ? "--defaults-torrc" : "-f";
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const char *ignore_opt = defaults_file ? NULL : "--ignore-missing-torrc";
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if (defaults_file)
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*ignore_missing_torrc = 1;
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for (i = 1; i < argc; ++i) {
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if (i < argc-1 && !strcmp(argv[i],"-f")) {
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if (i < argc-1 && !strcmp(argv[i],fname_opt)) {
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if (fname) {
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log(LOG_WARN, LD_CONFIG, "Duplicate -f options on command line.");
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log(LOG_WARN, LD_CONFIG, "Duplicate %s options on command line.",
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fname_opt);
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tor_free(fname);
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}
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fname = expand_filename(argv[i+1]);
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*using_default_torrc = 0;
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++i;
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} else if (!strcmp(argv[i],"--ignore-missing-torrc")) {
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} else if (ignore_opt && !strcmp(argv[i],ignore_opt)) {
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*ignore_missing_torrc = 1;
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}
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}
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if (*using_default_torrc) {
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/* didn't find one, try CONFDIR */
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const char *dflt = get_default_conf_file();
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const char *dflt = get_default_conf_file(defaults_file);
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if (dflt && file_status(dflt) == FN_FILE) {
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fname = tor_strdup(dflt);
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} else {
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#ifndef MS_WINDOWS
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char *fn;
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char *fn = NULL;
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if (!defaults_file)
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fn = expand_filename("~/.torrc");
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if (fn && file_status(fn) == FN_FILE) {
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fname = fn;
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@ -4332,31 +4365,34 @@ find_torrc_filename(int argc, char **argv,
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return fname;
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}
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/** Load torrc from disk, setting torrc_fname if successful */
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/** Load torrc from disk, setting torrc_fname if successful.
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* DOCDOC defaults_file */
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static char *
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load_torrc_from_disk(int argc, char **argv)
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load_torrc_from_disk(int argc, char **argv, int defaults_file)
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{
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char *fname=NULL;
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char *cf = NULL;
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int using_default_torrc = 1;
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int ignore_missing_torrc = 0;
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char **fname_var = defaults_file ? &torrc_fname : &torrc_defaults_fname;
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fname = find_torrc_filename(argc, argv,
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fname = find_torrc_filename(argc, argv, defaults_file,
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&using_default_torrc, &ignore_missing_torrc);
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tor_assert(fname);
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log(LOG_DEBUG, LD_CONFIG, "Opening config file \"%s\"", fname);
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tor_free(torrc_fname);
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torrc_fname = fname;
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tor_free(*fname_var);
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*fname_var = fname;
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/* Open config file */
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if (file_status(fname) != FN_FILE ||
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!(cf = read_file_to_str(fname,0,NULL))) {
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if (using_default_torrc == 1 || ignore_missing_torrc) {
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if (!defaults_file)
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log(LOG_NOTICE, LD_CONFIG, "Configuration file \"%s\" not present, "
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"using reasonable defaults.", fname);
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tor_free(fname); /* sets fname to NULL */
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torrc_fname = NULL;
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*fname_var = NULL;
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cf = tor_strdup("");
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} else {
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log(LOG_WARN, LD_CONFIG,
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@ -4370,7 +4406,7 @@ load_torrc_from_disk(int argc, char **argv)
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return cf;
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err:
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tor_free(fname);
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torrc_fname = NULL;
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*fname_var = NULL;
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return NULL;
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}
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@ -4381,7 +4417,7 @@ load_torrc_from_disk(int argc, char **argv)
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int
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options_init_from_torrc(int argc, char **argv)
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{
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char *cf=NULL;
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char *cf=NULL, *cf_defaults=NULL;
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int i, retval, command;
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static char **backup_argv;
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static int backup_argc;
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@ -4441,13 +4477,15 @@ options_init_from_torrc(int argc, char **argv)
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if (command == CMD_HASH_PASSWORD) {
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cf = tor_strdup("");
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} else {
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cf = load_torrc_from_disk(argc, argv);
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cf_defaults = load_torrc_from_disk(argc, argv, 1);
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cf = load_torrc_from_disk(argc, argv, 0);
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if (!cf)
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goto err;
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}
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retval = options_init_from_string(cf, command, command_arg, &errmsg);
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retval = options_init_from_string(cf_defaults, cf, command, command_arg, &errmsg);
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tor_free(cf);
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tor_free(cf_defaults);
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if (retval < 0)
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goto err;
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@ -4471,13 +4509,13 @@ options_init_from_torrc(int argc, char **argv)
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* * -4 for error while setting the new options
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*/
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setopt_err_t
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options_init_from_string(const char *cf,
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options_init_from_string(const char *cf_defaults, const char *cf,
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int command, const char *command_arg,
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char **msg)
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{
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or_options_t *oldoptions, *newoptions;
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or_options_t *oldoptions, *newoptions, *newdefaultoptions=NULL;
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config_line_t *cl;
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int retval;
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int retval, i;
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setopt_err_t err = SETOPT_ERR_MISC;
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tor_assert(msg);
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@ -4490,8 +4528,12 @@ options_init_from_string(const char *cf,
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newoptions->command = command;
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newoptions->command_arg = command_arg;
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for (i = 0; i < 2; ++i) {
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const char *body = i==0 ? cf_defaults : cf;
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if (!body)
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continue;
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/* get config lines, assign them */
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retval = config_get_lines(cf, &cl, 1);
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retval = config_get_lines(body, &cl, 1);
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if (retval < 0) {
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err = SETOPT_ERR_PARSE;
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goto err;
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@ -4502,6 +4544,9 @@ options_init_from_string(const char *cf,
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err = SETOPT_ERR_PARSE;
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goto err;
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}
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if (i==0)
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newdefaultoptions = options_dup(&options_format, newoptions);
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}
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/* Go through command-line variables too */
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retval = config_assign(&options_format, newoptions,
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@ -4535,6 +4580,8 @@ options_init_from_string(const char *cf,
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/* Clear newoptions and re-initialize them with new defaults. */
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config_free(&options_format, newoptions);
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config_free(&options_format, newdefaultoptions);
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newdefaultoptions = NULL;
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newoptions = tor_malloc_zero(sizeof(or_options_t));
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newoptions->_magic = OR_OPTIONS_MAGIC;
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options_init(newoptions);
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@ -4542,7 +4589,12 @@ options_init_from_string(const char *cf,
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newoptions->command_arg = command_arg;
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/* Assign all options a second time. */
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retval = config_get_lines(cf, &cl, 1);
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for (i = 0; i < 2; ++i) {
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const char *body = i==0 ? cf_defaults : cf;
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if (!body)
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continue;
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/* get config lines, assign them */
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retval = config_get_lines(body, &cl, 1);
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if (retval < 0) {
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err = SETOPT_ERR_PARSE;
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goto err;
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@ -4553,11 +4605,8 @@ options_init_from_string(const char *cf,
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err = SETOPT_ERR_PARSE;
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goto err;
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}
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retval = config_assign(&options_format, newoptions,
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global_cmdline_options, 0, 0, msg);
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if (retval < 0) {
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err = SETOPT_ERR_PARSE;
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goto err;
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if (i==0)
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newdefaultoptions = options_dup(&options_format, newoptions);
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}
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}
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@ -4576,11 +4625,14 @@ options_init_from_string(const char *cf,
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err = SETOPT_ERR_SETTING;
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goto err; /* frees and replaces old options */
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}
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config_free(&options_format, global_default_options);
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global_default_options = newdefaultoptions;
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return SETOPT_OK;
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err:
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config_free(&options_format, newoptions);
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config_free(&options_format, newdefaultoptions);
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if (*msg) {
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char *old_msg = *msg;
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tor_asprintf(msg, "Failed to parse/validate config: %s", old_msg);
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@ -4592,12 +4644,14 @@ options_init_from_string(const char *cf,
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/** Return the location for our configuration file.
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*/
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const char *
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get_torrc_fname(void)
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get_torrc_fname(int defaults_fname)
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{
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if (torrc_fname)
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return torrc_fname;
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const char *fname = defaults_fname ? torrc_defaults_fname : torrc_fname;
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if (fname)
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return fname;
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else
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return get_default_conf_file();
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return get_default_conf_file(defaults_fname);
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}
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/** Adjust the address map based on the MapAddress elements in the
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@ -5202,7 +5256,7 @@ parse_dir_server_line(const char *line, dirinfo_type_t required_type,
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* clause once Tor 0.1.2.17 is obsolete. */
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log_warn(LD_CONFIG, "Dangerous dirserver line. To correct, erase your "
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"torrc file (%s), or reinstall Tor and use the default torrc.",
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get_torrc_fname());
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get_torrc_fname(0));
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goto err;
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}
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if (base16_decode(digest, DIGEST_LEN, fingerprint, HEX_DIGEST_LEN)<0) {
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@ -5761,7 +5815,7 @@ options_save_current(void)
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* If we try falling back to datadirectory or something, we have a better
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* chance of saving the configuration, but a better chance of doing
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* something the user never expected. */
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return write_configuration_file(get_torrc_fname(), get_options());
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return write_configuration_file(get_torrc_fname(0), get_options());
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}
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/** Mapping from a unit name to a multiplier for converting that unit into a
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@ -6331,7 +6385,7 @@ or_state_save(time_t now)
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tor_free(global_state->TorVersion);
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tor_asprintf(&global_state->TorVersion, "Tor %s", get_version());
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state = config_dump(&state_format, global_state, 1, 0);
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state = config_dump(&state_format, NULL, global_state, 1, 0);
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format_local_iso_time(tbuf, now);
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tor_asprintf(&contents,
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"# Tor state file last generated on %s local time\n"
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@ -33,14 +33,14 @@ int is_local_addr(const tor_addr_t *addr);
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void options_init(or_options_t *options);
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char *options_dump(const or_options_t *options, int minimal);
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int options_init_from_torrc(int argc, char **argv);
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setopt_err_t options_init_from_string(const char *cf,
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setopt_err_t options_init_from_string(const char *cf_defaults, const char *cf,
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int command, const char *command_arg, char **msg);
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int option_is_recognized(const char *key);
|
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const char *option_get_canonical_name(const char *key);
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config_line_t *option_get_assignment(const or_options_t *options,
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const char *key);
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int options_save_current(void);
|
||||
const char *get_torrc_fname(void);
|
||||
const char *get_torrc_fname(int defaults_fname);
|
||||
char *options_get_datadir_fname2_suffix(const or_options_t *options,
|
||||
const char *sub1, const char *sub2,
|
||||
const char *suffix);
|
||||
|
||||
@ -883,7 +883,7 @@ handle_control_loadconf(control_connection_t *conn, uint32_t len,
|
||||
const char *msg = NULL;
|
||||
(void) len;
|
||||
|
||||
retval = options_init_from_string(body, CMD_RUN_TOR, NULL, &errstring);
|
||||
retval = options_init_from_string(NULL, body, CMD_RUN_TOR, NULL, &errstring);
|
||||
|
||||
if (retval != SETOPT_OK)
|
||||
log_warn(LD_CONTROL,
|
||||
@ -1378,7 +1378,9 @@ getinfo_helper_misc(control_connection_t *conn, const char *question,
|
||||
if (!strcmp(question, "version")) {
|
||||
*answer = tor_strdup(get_version());
|
||||
} else if (!strcmp(question, "config-file")) {
|
||||
*answer = tor_strdup(get_torrc_fname());
|
||||
*answer = tor_strdup(get_torrc_fname(0));
|
||||
} else if (!strcmp(question, "config-defaults-file")) {
|
||||
*answer = tor_strdup(get_torrc_fname(1));
|
||||
} else if (!strcmp(question, "config-text")) {
|
||||
*answer = options_dump(get_options(), 1);
|
||||
} else if (!strcmp(question, "info/names")) {
|
||||
|
||||
Loading…
Reference in New Issue
Block a user