X-Git-Url: https://git.cameronkatri.com/cgit.git/blobdiff_plain/c96becc1e5ebff9e6609e61e11e80debcb3a778c..ad006918a570da32457461a5e59289b611d9a732:/cgit.c?ds=sidebyside

diff --git a/cgit.c b/cgit.c
index d74b0f3..5937b9e 100644
--- a/cgit.c
+++ b/cgit.c
@@ -27,36 +27,6 @@ static void add_mimetype(const char *name, const char *value)
 	item->util = xstrdup(value);
 }
 
-static struct cgit_filter *new_filter(const char *cmd, filter_type filtertype)
-{
-	struct cgit_filter *f;
-	int args_size = 0;
-	int extra_args;
-
-	if (!cmd || !cmd[0])
-		return NULL;
-
-	switch (filtertype) {
-		case SOURCE:
-		case ABOUT:
-			extra_args = 1;
-			break;
-
-		case COMMIT:
-		default:
-			extra_args = 0;
-			break;
-	}
-
-	f = xmalloc(sizeof(struct cgit_filter));
-	f->cmd = xstrdup(cmd);
-	args_size = (2 + extra_args) * sizeof(char *);
-	f->argv = xmalloc(args_size);
-	memset(f->argv, 0, args_size);
-	f->argv[0] = f->cmd;
-	return f;
-}
-
 static void process_cached_repolist(const char *path);
 
 static void repo_config(struct cgit_repo *repo, const char *name, const char *value)
@@ -99,7 +69,7 @@ static void repo_config(struct cgit_repo *repo, const char *name, const char *va
 		repo->max_stats = cgit_find_stats_period(value, NULL);
 	else if (!strcmp(name, "module-link"))
 		repo->module_link= xstrdup(value);
-	else if (!prefixcmp(name, "module-link.")) {
+	else if (starts_with(name, "module-link.")) {
 		item = string_list_append(&repo->submodules, xstrdup(name + 12));
 		item->util = xstrdup(value);
 	} else if (!strcmp(name, "section"))
@@ -112,13 +82,21 @@ static void repo_config(struct cgit_repo *repo, const char *name, const char *va
 		repo->logo = xstrdup(value);
 	else if (!strcmp(name, "logo-link") && value != NULL)
 		repo->logo_link = xstrdup(value);
+	else if (!strcmp(name, "hide"))
+		repo->hide = atoi(value);
+	else if (!strcmp(name, "ignore"))
+		repo->ignore = atoi(value);
 	else if (ctx.cfg.enable_filter_overrides) {
 		if (!strcmp(name, "about-filter"))
-			repo->about_filter = new_filter(value, ABOUT);
+			repo->about_filter = cgit_new_filter(value, ABOUT);
 		else if (!strcmp(name, "commit-filter"))
-			repo->commit_filter = new_filter(value, COMMIT);
+			repo->commit_filter = cgit_new_filter(value, COMMIT);
 		else if (!strcmp(name, "source-filter"))
-			repo->source_filter = new_filter(value, SOURCE);
+			repo->source_filter = cgit_new_filter(value, SOURCE);
+		else if (!strcmp(name, "email-filter"))
+			repo->email_filter = cgit_new_filter(value, EMAIL);
+		else if (!strcmp(name, "owner-filter"))
+			repo->owner_filter = cgit_new_filter(value, OWNER);
 	}
 }
 
@@ -130,9 +108,9 @@ static void config_cb(const char *name, const char *value)
 		ctx.repo = cgit_add_repo(value);
 	else if (ctx.repo && !strcmp(name, "repo.path"))
 		ctx.repo->path = trim_end(value, '/');
-	else if (ctx.repo && !prefixcmp(name, "repo."))
+	else if (ctx.repo && starts_with(name, "repo."))
 		repo_config(ctx.repo, name + 5, value);
-	else if (!strcmp(name, "readme") && value != NULL)
+	else if (!strcmp(name, "readme"))
 		string_list_append(&ctx.cfg.readme, xstrdup(value));
 	else if (!strcmp(name, "root-title"))
 		ctx.cfg.root_title = xstrdup(value);
@@ -174,6 +152,8 @@ static void config_cb(const char *name, const char *value)
 		ctx.cfg.snapshots = cgit_parse_snapshots_mask(value);
 	else if (!strcmp(name, "enable-filter-overrides"))
 		ctx.cfg.enable_filter_overrides = atoi(value);
+	else if (!strcmp(name, "enable-follow-links"))
+		ctx.cfg.enable_follow_links = atoi(value);
 	else if (!strcmp(name, "enable-http-clone"))
 		ctx.cfg.enable_http_clone = atoi(value);
 	else if (!strcmp(name, "enable-index-links"))
@@ -212,12 +192,20 @@ static void config_cb(const char *name, const char *value)
 		ctx.cfg.cache_dynamic_ttl = atoi(value);
 	else if (!strcmp(name, "cache-about-ttl"))
 		ctx.cfg.cache_about_ttl = atoi(value);
+	else if (!strcmp(name, "cache-snapshot-ttl"))
+		ctx.cfg.cache_snapshot_ttl = atoi(value);
 	else if (!strcmp(name, "case-sensitive-sort"))
 		ctx.cfg.case_sensitive_sort = atoi(value);
 	else if (!strcmp(name, "about-filter"))
-		ctx.cfg.about_filter = new_filter(value, ABOUT);
+		ctx.cfg.about_filter = cgit_new_filter(value, ABOUT);
 	else if (!strcmp(name, "commit-filter"))
-		ctx.cfg.commit_filter = new_filter(value, COMMIT);
+		ctx.cfg.commit_filter = cgit_new_filter(value, COMMIT);
+	else if (!strcmp(name, "email-filter"))
+		ctx.cfg.email_filter = cgit_new_filter(value, EMAIL);
+	else if (!strcmp(name, "owner-filter"))
+		ctx.cfg.owner_filter = cgit_new_filter(value, OWNER);
+	else if (!strcmp(name, "auth-filter"))
+		ctx.cfg.auth_filter = cgit_new_filter(value, AUTH);
 	else if (!strcmp(name, "embedded"))
 		ctx.cfg.embedded = atoi(value);
 	else if (!strcmp(name, "max-atom-items"))
@@ -251,7 +239,7 @@ static void config_cb(const char *name, const char *value)
 	else if (!strcmp(name, "section-sort"))
 		ctx.cfg.section_sort = atoi(value);
 	else if (!strcmp(name, "source-filter"))
-		ctx.cfg.source_filter = new_filter(value, SOURCE);
+		ctx.cfg.source_filter = cgit_new_filter(value, SOURCE);
 	else if (!strcmp(name, "summary-log"))
 		ctx.cfg.summary_log = atoi(value);
 	else if (!strcmp(name, "summary-branches"))
@@ -259,7 +247,7 @@ static void config_cb(const char *name, const char *value)
 	else if (!strcmp(name, "summary-tags"))
 		ctx.cfg.summary_tags = atoi(value);
 	else if (!strcmp(name, "side-by-side-diffs"))
-		ctx.cfg.ssdiff = atoi(value);
+		ctx.cfg.difftype = atoi(value) ? DIFF_SSDIFF : DIFF_UNIFIED;
 	else if (!strcmp(name, "agefile"))
 		ctx.cfg.agefile = xstrdup(value);
 	else if (!strcmp(name, "mimetype-file"))
@@ -286,7 +274,7 @@ static void config_cb(const char *name, const char *value)
 			ctx.cfg.branch_sort = 1;
 		if (!strcmp(value, "name"))
 			ctx.cfg.branch_sort = 0;
-	} else if (!prefixcmp(name, "mimetype."))
+	} else if (starts_with(name, "mimetype."))
 		add_mimetype(name + 9, value);
 	else if (!strcmp(name, "include"))
 		parse_configfile(expand_macros(value), config_cb);
@@ -334,90 +322,101 @@ static void querystring_cb(const char *name, const char *value)
 		ctx.qry.showmsg = atoi(value);
 	} else if (!strcmp(name, "period")) {
 		ctx.qry.period = xstrdup(value);
+	} else if (!strcmp(name, "dt")) {
+		ctx.qry.difftype = atoi(value);
+		ctx.qry.has_difftype = 1;
 	} else if (!strcmp(name, "ss")) {
-		ctx.qry.ssdiff = atoi(value);
-		ctx.qry.has_ssdiff = 1;
+		/* No longer generated, but there may be links out there. */
+		ctx.qry.difftype = atoi(value) ? DIFF_SSDIFF : DIFF_UNIFIED;
+		ctx.qry.has_difftype = 1;
 	} else if (!strcmp(name, "all")) {
 		ctx.qry.show_all = atoi(value);
 	} else if (!strcmp(name, "context")) {
 		ctx.qry.context = atoi(value);
 	} else if (!strcmp(name, "ignorews")) {
 		ctx.qry.ignorews = atoi(value);
+	} else if (!strcmp(name, "follow")) {
+		ctx.qry.follow = atoi(value);
 	}
 }
 
-static void prepare_context(struct cgit_context *ctx)
+static void prepare_context(void)
 {
-	memset(ctx, 0, sizeof(*ctx));
-	ctx->cfg.agefile = "info/web/last-modified";
-	ctx->cfg.nocache = 0;
-	ctx->cfg.cache_size = 0;
-	ctx->cfg.cache_max_create_time = 5;
-	ctx->cfg.cache_root = CGIT_CACHE_ROOT;
-	ctx->cfg.cache_about_ttl = 15;
-	ctx->cfg.cache_repo_ttl = 5;
-	ctx->cfg.cache_root_ttl = 5;
-	ctx->cfg.cache_scanrc_ttl = 15;
-	ctx->cfg.cache_dynamic_ttl = 5;
-	ctx->cfg.cache_static_ttl = -1;
-	ctx->cfg.case_sensitive_sort = 1;
-	ctx->cfg.branch_sort = 0;
-	ctx->cfg.commit_sort = 0;
-	ctx->cfg.css = "/cgit.css";
-	ctx->cfg.logo = "/cgit.png";
-	ctx->cfg.favicon = "/favicon.ico";
-	ctx->cfg.local_time = 0;
-	ctx->cfg.enable_http_clone = 1;
-	ctx->cfg.enable_index_owner = 1;
-	ctx->cfg.enable_tree_linenumbers = 1;
-	ctx->cfg.enable_git_config = 0;
-	ctx->cfg.max_repo_count = 50;
-	ctx->cfg.max_commit_count = 50;
-	ctx->cfg.max_lock_attempts = 5;
-	ctx->cfg.max_msg_len = 80;
-	ctx->cfg.max_repodesc_len = 80;
-	ctx->cfg.max_blob_size = 0;
-	ctx->cfg.max_stats = 0;
-	ctx->cfg.project_list = NULL;
-	ctx->cfg.renamelimit = -1;
-	ctx->cfg.remove_suffix = 0;
-	ctx->cfg.robots = "index, nofollow";
-	ctx->cfg.root_title = "Git repository browser";
-	ctx->cfg.root_desc = "a fast webinterface for the git dscm";
-	ctx->cfg.scan_hidden_path = 0;
-	ctx->cfg.script_name = CGIT_SCRIPT_NAME;
-	ctx->cfg.section = "";
-	ctx->cfg.repository_sort = "name";
-	ctx->cfg.section_sort = 1;
-	ctx->cfg.summary_branches = 10;
-	ctx->cfg.summary_log = 10;
-	ctx->cfg.summary_tags = 10;
-	ctx->cfg.max_atom_items = 10;
-	ctx->cfg.ssdiff = 0;
-	ctx->env.cgit_config = getenv("CGIT_CONFIG");
-	ctx->env.http_host = getenv("HTTP_HOST");
-	ctx->env.https = getenv("HTTPS");
-	ctx->env.no_http = getenv("NO_HTTP");
-	ctx->env.path_info = getenv("PATH_INFO");
-	ctx->env.query_string = getenv("QUERY_STRING");
-	ctx->env.request_method = getenv("REQUEST_METHOD");
-	ctx->env.script_name = getenv("SCRIPT_NAME");
-	ctx->env.server_name = getenv("SERVER_NAME");
-	ctx->env.server_port = getenv("SERVER_PORT");
-	ctx->page.mimetype = "text/html";
-	ctx->page.charset = PAGE_ENCODING;
-	ctx->page.filename = NULL;
-	ctx->page.size = 0;
-	ctx->page.modified = time(NULL);
-	ctx->page.expires = ctx->page.modified;
-	ctx->page.etag = NULL;
-	memset(&ctx->cfg.mimetypes, 0, sizeof(struct string_list));
-	if (ctx->env.script_name)
-		ctx->cfg.script_name = xstrdup(ctx->env.script_name);
-	if (ctx->env.query_string)
-		ctx->qry.raw = xstrdup(ctx->env.query_string);
-	if (!ctx->env.cgit_config)
-		ctx->env.cgit_config = CGIT_CONFIG;
+	memset(&ctx, 0, sizeof(ctx));
+	ctx.cfg.agefile = "info/web/last-modified";
+	ctx.cfg.nocache = 0;
+	ctx.cfg.cache_size = 0;
+	ctx.cfg.cache_max_create_time = 5;
+	ctx.cfg.cache_root = CGIT_CACHE_ROOT;
+	ctx.cfg.cache_about_ttl = 15;
+	ctx.cfg.cache_snapshot_ttl = 5;
+	ctx.cfg.cache_repo_ttl = 5;
+	ctx.cfg.cache_root_ttl = 5;
+	ctx.cfg.cache_scanrc_ttl = 15;
+	ctx.cfg.cache_dynamic_ttl = 5;
+	ctx.cfg.cache_static_ttl = -1;
+	ctx.cfg.case_sensitive_sort = 1;
+	ctx.cfg.branch_sort = 0;
+	ctx.cfg.commit_sort = 0;
+	ctx.cfg.css = "/cgit.css";
+	ctx.cfg.logo = "/cgit.png";
+	ctx.cfg.favicon = "/favicon.ico";
+	ctx.cfg.local_time = 0;
+	ctx.cfg.enable_http_clone = 1;
+	ctx.cfg.enable_index_owner = 1;
+	ctx.cfg.enable_tree_linenumbers = 1;
+	ctx.cfg.enable_git_config = 0;
+	ctx.cfg.max_repo_count = 50;
+	ctx.cfg.max_commit_count = 50;
+	ctx.cfg.max_lock_attempts = 5;
+	ctx.cfg.max_msg_len = 80;
+	ctx.cfg.max_repodesc_len = 80;
+	ctx.cfg.max_blob_size = 0;
+	ctx.cfg.max_stats = 0;
+	ctx.cfg.project_list = NULL;
+	ctx.cfg.renamelimit = -1;
+	ctx.cfg.remove_suffix = 0;
+	ctx.cfg.robots = "index, nofollow";
+	ctx.cfg.root_title = "Git repository browser";
+	ctx.cfg.root_desc = "a fast webinterface for the git dscm";
+	ctx.cfg.scan_hidden_path = 0;
+	ctx.cfg.script_name = CGIT_SCRIPT_NAME;
+	ctx.cfg.section = "";
+	ctx.cfg.repository_sort = "name";
+	ctx.cfg.section_sort = 1;
+	ctx.cfg.summary_branches = 10;
+	ctx.cfg.summary_log = 10;
+	ctx.cfg.summary_tags = 10;
+	ctx.cfg.max_atom_items = 10;
+	ctx.cfg.difftype = DIFF_UNIFIED;
+	ctx.env.cgit_config = getenv("CGIT_CONFIG");
+	ctx.env.http_host = getenv("HTTP_HOST");
+	ctx.env.https = getenv("HTTPS");
+	ctx.env.no_http = getenv("NO_HTTP");
+	ctx.env.path_info = getenv("PATH_INFO");
+	ctx.env.query_string = getenv("QUERY_STRING");
+	ctx.env.request_method = getenv("REQUEST_METHOD");
+	ctx.env.script_name = getenv("SCRIPT_NAME");
+	ctx.env.server_name = getenv("SERVER_NAME");
+	ctx.env.server_port = getenv("SERVER_PORT");
+	ctx.env.http_cookie = getenv("HTTP_COOKIE");
+	ctx.env.http_referer = getenv("HTTP_REFERER");
+	ctx.env.content_length = getenv("CONTENT_LENGTH") ? strtoul(getenv("CONTENT_LENGTH"), NULL, 10) : 0;
+	ctx.env.authenticated = 0;
+	ctx.page.mimetype = "text/html";
+	ctx.page.charset = PAGE_ENCODING;
+	ctx.page.filename = NULL;
+	ctx.page.size = 0;
+	ctx.page.modified = time(NULL);
+	ctx.page.expires = ctx.page.modified;
+	ctx.page.etag = NULL;
+	memset(&ctx.cfg.mimetypes, 0, sizeof(struct string_list));
+	if (ctx.env.script_name)
+		ctx.cfg.script_name = xstrdup(ctx.env.script_name);
+	if (ctx.env.query_string)
+		ctx.qry.raw = xstrdup(ctx.env.query_string);
+	if (!ctx.env.cgit_config)
+		ctx.env.cgit_config = CGIT_CONFIG;
 }
 
 struct refmatch {
@@ -426,7 +425,7 @@ struct refmatch {
 	int match;
 };
 
-static int find_current_ref(const char *refname, const unsigned char *sha1,
+static int find_current_ref(const char *refname, const struct object_id *oid,
 			    int flags, void *cb_data)
 {
 	struct refmatch *info;
@@ -470,8 +469,8 @@ static char *guess_defbranch(void)
 	const char *ref;
 	unsigned char sha1[20];
 
-	ref = resolve_ref_unsafe("HEAD", sha1, 0, NULL);
-	if (!ref || prefixcmp(ref, "refs/heads/"))
+	ref = resolve_ref_unsafe("HEAD", 0, sha1, NULL);
+	if (!ref || !starts_with(ref, "refs/heads/"))
 		return "master";
 	return xstrdup(ref + 11);
 }
@@ -521,12 +520,6 @@ static void choose_readme(struct cgit_repo *repo)
 			free(ref);
 			continue;
 		}
-		/* If there's only one item, we skip the possibly expensive
-		 * selection process. */
-		if (repo->readme.nr == 1) {
-			found = 1;
-			break;
-		}
 		if (ref) {
 			if (cgit_ref_path_exists(filename, ref, 1)) {
 				found = 1;
@@ -547,14 +540,25 @@ static void choose_readme(struct cgit_repo *repo)
 		string_list_append(&repo->readme, filename)->util = ref;
 }
 
-static int prepare_repo_cmd(struct cgit_context *ctx)
+static void print_no_repo_clone_urls(const char *url)
+{
+        html("<tr><td><a rel='vcs-git' href='");
+        html_url_path(url);
+        html("' title='");
+        html_attr(ctx.repo->name);
+        html(" Git repository'>");
+        html_txt(url);
+        html("</a></td></tr>\n");
+}
+
+static int prepare_repo_cmd(void)
 {
 	unsigned char sha1[20];
 	int nongit = 0;
 	int rc;
 
 	/* The path to the git repository. */
-	setenv("GIT_DIR", ctx->repo->path, 1);
+	setenv("GIT_DIR", ctx.repo->path, 1);
 
 	/* Do not look in /etc/ for gitconfig and gitattributes. */
 	setenv("GIT_CONFIG_NOSYSTEM", "1", 1);
@@ -569,107 +573,167 @@ static int prepare_repo_cmd(struct cgit_context *ctx)
 	init_display_notes(NULL);
 
 	if (nongit) {
-		const char *name = ctx->repo->name;
+		const char *name = ctx.repo->name;
 		rc = errno;
-		ctx->page.title = fmtalloc("%s - %s", ctx->cfg.root_title,
+		ctx.page.title = fmtalloc("%s - %s", ctx.cfg.root_title,
 						"config error");
-		ctx->repo = NULL;
-		cgit_print_http_headers(ctx);
-		cgit_print_docstart(ctx);
-		cgit_print_pageheader(ctx);
+		ctx.repo = NULL;
+		cgit_print_http_headers();
+		cgit_print_docstart();
+		cgit_print_pageheader();
 		cgit_print_error("Failed to open %s: %s", name,
 				 rc ? strerror(rc) : "Not a valid git repository");
 		cgit_print_docend();
 		return 1;
 	}
-	ctx->page.title = fmtalloc("%s - %s", ctx->repo->name, ctx->repo->desc);
+	ctx.page.title = fmtalloc("%s - %s", ctx.repo->name, ctx.repo->desc);
 
-	if (!ctx->repo->defbranch)
-		ctx->repo->defbranch = guess_defbranch();
+	if (!ctx.repo->defbranch)
+		ctx.repo->defbranch = guess_defbranch();
 
-	if (!ctx->qry.head) {
-		ctx->qry.nohead = 1;
-		ctx->qry.head = find_default_branch(ctx->repo);
+	if (!ctx.qry.head) {
+		ctx.qry.nohead = 1;
+		ctx.qry.head = find_default_branch(ctx.repo);
 	}
 
-	if (!ctx->qry.head) {
-		cgit_print_http_headers(ctx);
-		cgit_print_docstart(ctx);
-		cgit_print_pageheader(ctx);
+	if (!ctx.qry.head) {
+		cgit_print_http_headers();
+		cgit_print_docstart();
+		cgit_print_pageheader();
 		cgit_print_error("Repository seems to be empty");
+		if (!strcmp(ctx.qry.page, "summary")) {
+			html("<table class='list'><tr class='nohover'><td>&nbsp;</td></tr><tr class='nohover'><th class='left'>Clone</th></tr>\n");
+			cgit_prepare_repo_env(ctx.repo);
+			cgit_add_clone_urls(print_no_repo_clone_urls);
+			html("</table>\n");
+		}
 		cgit_print_docend();
 		return 1;
 	}
 
-	if (get_sha1(ctx->qry.head, sha1)) {
-		char *tmp = xstrdup(ctx->qry.head);
-		ctx->qry.head = ctx->repo->defbranch;
-		ctx->page.status = 404;
-		ctx->page.statusmsg = "Not found";
-		cgit_print_http_headers(ctx);
-		cgit_print_docstart(ctx);
-		cgit_print_pageheader(ctx);
-		cgit_print_error("Invalid branch: %s", tmp);
-		cgit_print_docend();
+	if (get_sha1(ctx.qry.head, sha1)) {
+		char *tmp = xstrdup(ctx.qry.head);
+		ctx.qry.head = ctx.repo->defbranch;
+		cgit_print_error_page(404, "Not found",
+				"Invalid branch: %s", tmp);
+		free(tmp);
 		return 1;
 	}
-	sort_string_list(&ctx->repo->submodules);
-	cgit_prepare_repo_env(ctx->repo);
-	choose_readme(ctx->repo);
+	string_list_sort(&ctx.repo->submodules);
+	cgit_prepare_repo_env(ctx.repo);
+	choose_readme(ctx.repo);
 	return 0;
 }
 
-static void process_request(void *cbdata)
+static inline void open_auth_filter(const char *function)
 {
-	struct cgit_context *ctx = cbdata;
-	struct cgit_cmd *cmd;
+	cgit_open_filter(ctx.cfg.auth_filter, function,
+		ctx.env.http_cookie ? ctx.env.http_cookie : "",
+		ctx.env.request_method ? ctx.env.request_method : "",
+		ctx.env.query_string ? ctx.env.query_string : "",
+		ctx.env.http_referer ? ctx.env.http_referer : "",
+		ctx.env.path_info ? ctx.env.path_info : "",
+		ctx.env.http_host ? ctx.env.http_host : "",
+		ctx.env.https ? ctx.env.https : "",
+		ctx.qry.repo ? ctx.qry.repo : "",
+		ctx.qry.page ? ctx.qry.page : "",
+		ctx.qry.url ? ctx.qry.url : "",
+		cgit_loginurl());
+}
 
-	cmd = cgit_get_cmd(ctx);
-	if (!cmd) {
-		ctx->page.title = "cgit error";
-		ctx->page.status = 404;
-		ctx->page.statusmsg = "Not found";
-		cgit_print_http_headers(ctx);
-		cgit_print_docstart(ctx);
-		cgit_print_pageheader(ctx);
-		cgit_print_error("Invalid request");
-		cgit_print_docend();
+/* We intentionally keep this rather small, instead of looping and
+ * feeding it to the filter a couple bytes at a time. This way, the
+ * filter itself does not need to handle any denial of service or
+ * buffer bloat issues. If this winds up being too small, people
+ * will complain on the mailing list, and we'll increase it as needed. */
+#define MAX_AUTHENTICATION_POST_BYTES 4096
+/* The filter is expected to spit out "Status: " and all headers. */
+static inline void authenticate_post(void)
+{
+	char buffer[MAX_AUTHENTICATION_POST_BYTES];
+	int len;
+
+	open_auth_filter("authenticate-post");
+	len = ctx.env.content_length;
+	if (len > MAX_AUTHENTICATION_POST_BYTES)
+		len = MAX_AUTHENTICATION_POST_BYTES;
+	if (read(STDIN_FILENO, buffer, len) < 0)
+		die_errno("Could not read POST from stdin");
+	if (write(STDOUT_FILENO, buffer, len) < 0)
+		die_errno("Could not write POST to stdout");
+	cgit_close_filter(ctx.cfg.auth_filter);
+	exit(0);
+}
+
+static inline void authenticate_cookie(void)
+{
+	/* If we don't have an auth_filter, consider all cookies valid, and thus return early. */
+	if (!ctx.cfg.auth_filter) {
+		ctx.env.authenticated = 1;
 		return;
 	}
 
-	if (!ctx->cfg.enable_http_clone && cmd->is_clone) {
-		html_status(404, "Not found", 0);
+	/* If we're having something POST'd to /login, we're authenticating POST,
+	 * instead of the cookie, so call authenticate_post and bail out early.
+	 * This pattern here should match /?p=login with POST. */
+	if (ctx.env.request_method && ctx.qry.page && !ctx.repo && \
+	    !strcmp(ctx.env.request_method, "POST") && !strcmp(ctx.qry.page, "login")) {
+		authenticate_post();
 		return;
 	}
 
-	/* If cmd->want_vpath is set, assume ctx->qry.path contains a "virtual"
-	 * in-project path limit to be made available at ctx->qry.vpath.
-	 * Otherwise, no path limit is in effect (ctx->qry.vpath = NULL).
-	 */
-	ctx->qry.vpath = cmd->want_vpath ? ctx->qry.path : NULL;
+	/* If we've made it this far, we're authenticating the cookie for real, so do that. */
+	open_auth_filter("authenticate-cookie");
+	ctx.env.authenticated = cgit_close_filter(ctx.cfg.auth_filter);
+}
 
-	if (cmd->want_repo && !ctx->repo) {
-		cgit_print_http_headers(ctx);
-		cgit_print_docstart(ctx);
-		cgit_print_pageheader(ctx);
-		cgit_print_error("No repository selected");
+static void process_request(void)
+{
+	struct cgit_cmd *cmd;
+
+	/* If we're not yet authenticated, no matter what page we're on,
+	 * display the authentication body from the auth_filter. This should
+	 * never be cached. */
+	if (!ctx.env.authenticated) {
+		ctx.page.title = "Authentication Required";
+		cgit_print_http_headers();
+		cgit_print_docstart();
+		cgit_print_pageheader();
+		open_auth_filter("body");
+		cgit_close_filter(ctx.cfg.auth_filter);
 		cgit_print_docend();
 		return;
 	}
 
-	if (ctx->repo && prepare_repo_cmd(ctx))
+	cmd = cgit_get_cmd();
+	if (!cmd) {
+		ctx.page.title = "cgit error";
+		cgit_print_error_page(404, "Not found", "Invalid request");
 		return;
+	}
 
-	if (cmd->want_layout) {
-		cgit_print_http_headers(ctx);
-		cgit_print_docstart(ctx);
-		cgit_print_pageheader(ctx);
+	if (!ctx.cfg.enable_http_clone && cmd->is_clone) {
+		ctx.page.title = "cgit error";
+		cgit_print_error_page(404, "Not found", "Invalid request");
+		return;
 	}
 
-	cmd->fn(ctx);
+	/* If cmd->want_vpath is set, assume ctx.qry.path contains a "virtual"
+	 * in-project path limit to be made available at ctx.qry.vpath.
+	 * Otherwise, no path limit is in effect (ctx.qry.vpath = NULL).
+	 */
+	ctx.qry.vpath = cmd->want_vpath ? ctx.qry.path : NULL;
 
-	if (cmd->want_layout)
-		cgit_print_docend();
+	if (cmd->want_repo && !ctx.repo) {
+		cgit_print_error_page(400, "Bad request",
+				"No repository selected");
+		return;
+	}
+
+	if (ctx.repo && prepare_repo_cmd())
+		return;
+
+	cmd->fn();
 }
 
 static int cmp_repos(const void *a, const void *b)
@@ -736,11 +800,15 @@ static void print_repo(FILE *f, struct cgit_repo *repo)
 	fprintf(f, "repo.enable-log-linecount=%d\n",
 	        repo->enable_log_linecount);
 	if (repo->about_filter && repo->about_filter != ctx.cfg.about_filter)
-		fprintf(f, "repo.about-filter=%s\n", repo->about_filter->cmd);
+		cgit_fprintf_filter(repo->about_filter, f, "repo.about-filter=");
 	if (repo->commit_filter && repo->commit_filter != ctx.cfg.commit_filter)
-		fprintf(f, "repo.commit-filter=%s\n", repo->commit_filter->cmd);
+		cgit_fprintf_filter(repo->commit_filter, f, "repo.commit-filter=");
 	if (repo->source_filter && repo->source_filter != ctx.cfg.source_filter)
-		fprintf(f, "repo.source-filter=%s\n", repo->source_filter->cmd);
+		cgit_fprintf_filter(repo->source_filter, f, "repo.source-filter=");
+	if (repo->email_filter && repo->email_filter != ctx.cfg.email_filter)
+		cgit_fprintf_filter(repo->email_filter, f, "repo.email-filter=");
+	if (repo->owner_filter && repo->owner_filter != ctx.cfg.owner_filter)
+		cgit_fprintf_filter(repo->owner_filter, f, "repo.owner-filter=");
 	if (repo->snapshots != ctx.cfg.snapshots) {
 		char *tmp = build_snapshot_setting(repo->snapshots);
 		fprintf(f, "repo.snapshots=%s\n", tmp ? tmp : "");
@@ -763,6 +831,8 @@ static void print_repo(FILE *f, struct cgit_repo *repo)
 		else if (repo->commit_sort == 2)
 			fprintf(f, "repo.commit-sort=topo\n");
 	}
+	fprintf(f, "repo.hide=%d\n", repo->hide);
+	fprintf(f, "repo.ignore=%d\n", repo->ignore);
 	fprintf(f, "\n");
 }
 
@@ -863,28 +933,45 @@ static void cgit_parse_args(int argc, const char **argv)
 	int scan = 0;
 
 	for (i = 1; i < argc; i++) {
-		if (!prefixcmp(argv[i], "--cache=")) {
+		if (!strcmp(argv[i], "--version")) {
+			printf("CGit %s | http://git.zx2c4.com/cgit/\n\nCompiled in features:\n", CGIT_VERSION);
+#ifdef NO_LUA
+			printf("[-] ");
+#else
+			printf("[+] ");
+#endif
+			printf("Lua scripting\n");
+#ifndef HAVE_LINUX_SENDFILE
+			printf("[-] ");
+#else
+			printf("[+] ");
+#endif
+			printf("Linux sendfile() usage\n");
+
+			exit(0);
+		}
+		if (starts_with(argv[i], "--cache=")) {
 			ctx.cfg.cache_root = xstrdup(argv[i] + 8);
 		} else if (!strcmp(argv[i], "--nocache")) {
 			ctx.cfg.nocache = 1;
 		} else if (!strcmp(argv[i], "--nohttp")) {
 			ctx.env.no_http = "1";
-		} else if (!prefixcmp(argv[i], "--query=")) {
+		} else if (starts_with(argv[i], "--query=")) {
 			ctx.qry.raw = xstrdup(argv[i] + 8);
-		} else if (!prefixcmp(argv[i], "--repo=")) {
+		} else if (starts_with(argv[i], "--repo=")) {
 			ctx.qry.repo = xstrdup(argv[i] + 7);
-		} else if (!prefixcmp(argv[i], "--page=")) {
+		} else if (starts_with(argv[i], "--page=")) {
 			ctx.qry.page = xstrdup(argv[i] + 7);
-		} else if (!prefixcmp(argv[i], "--head=")) {
+		} else if (starts_with(argv[i], "--head=")) {
 			ctx.qry.head = xstrdup(argv[i] + 7);
 			ctx.qry.has_symref = 1;
-		} else if (!prefixcmp(argv[i], "--sha1=")) {
+		} else if (starts_with(argv[i], "--sha1=")) {
 			ctx.qry.sha1 = xstrdup(argv[i] + 7);
 			ctx.qry.has_sha1 = 1;
-		} else if (!prefixcmp(argv[i], "--ofs=")) {
+		} else if (starts_with(argv[i], "--ofs=")) {
 			ctx.qry.ofs = atoi(argv[i] + 6);
-		} else if (!prefixcmp(argv[i], "--scan-tree=") ||
-		           !prefixcmp(argv[i], "--scan-path=")) {
+		} else if (starts_with(argv[i], "--scan-tree=") ||
+		           starts_with(argv[i], "--scan-path=")) {
 			/*
 			 * HACK: The global snapshot bit mask defines the set
 			 * of allowed snapshot formats, but the config file
@@ -909,7 +996,7 @@ static void cgit_parse_args(int argc, const char **argv)
 	}
 }
 
-static int calc_ttl()
+static int calc_ttl(void)
 {
 	if (!ctx.repo)
 		return ctx.cfg.cache_root_ttl;
@@ -920,6 +1007,9 @@ static int calc_ttl()
 	if (!strcmp(ctx.qry.page, "about"))
 		return ctx.cfg.cache_about_ttl;
 
+	if (!strcmp(ctx.qry.page, "snapshot"))
+		return ctx.cfg.cache_snapshot_ttl;
+
 	if (ctx.qry.has_sha1)
 		return ctx.cfg.cache_static_ttl;
 
@@ -934,7 +1024,10 @@ int main(int argc, const char **argv)
 	const char *path;
 	int err, ttl;
 
-	prepare_context(&ctx);
+	cgit_init_filters();
+	atexit(cgit_cleanup_filters);
+
+	prepare_context();
 	cgit_repolist.length = 0;
 	cgit_repolist.count = 0;
 	cgit_repolist.repos = NULL;
@@ -970,17 +1063,23 @@ int main(int argc, const char **argv)
 		cgit_parse_url(ctx.qry.url);
 	}
 
+	/* Before we go any further, we set ctx.env.authenticated by checking to see
+	 * if the supplied cookie is valid. All cookies are valid if there is no
+	 * auth_filter. If there is an auth_filter, the filter decides. */
+	authenticate_cookie();
+
 	ttl = calc_ttl();
 	if (ttl < 0)
 		ctx.page.expires += 10 * 365 * 24 * 60 * 60; /* 10 years */
 	else
 		ctx.page.expires += ttl * 60;
-	if (ctx.env.request_method && !strcmp(ctx.env.request_method, "HEAD"))
+	if (!ctx.env.authenticated || (ctx.env.request_method && !strcmp(ctx.env.request_method, "HEAD")))
 		ctx.cfg.nocache = 1;
 	if (ctx.cfg.nocache)
 		ctx.cfg.cache_size = 0;
 	err = cache_process(ctx.cfg.cache_size, ctx.cfg.cache_root,
-			    ctx.qry.raw, ttl, process_request, &ctx);
+			    ctx.qry.raw, ttl, process_request);
+	cgit_cleanup_filters();
 	if (err)
 		cgit_print_error("Error processing page: %s (%d)",
 				 strerror(err), err);