Flatten extras to top-level directory

1 files changed, 0 insertions, 566 deletions

diff --git a/extra/edit/edit.c b/extra/edit/edit.c
deleted file mode 100644
index 793e413..0000000
--- a/extra/edit/edit.c
+++ /dev/null
@@ -1,566 +0,0 @@
-/* Copyright (C) 2022  June McEnroe <june@causal.agency>
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
- *
- * Additional permission under GNU GPL version 3 section 7:
- *
- * If you modify this Program, or any covered work, by linking or
- * combining it with OpenSSL (or a modified version of that library),
- * containing parts covered by the terms of the OpenSSL License and the
- * original SSLeay license, the licensors of this Program grant you
- * additional permission to convey the resulting work. Corresponding
- * Source for a non-source form of such a combination shall include the
- * source code for the parts of OpenSSL used as well as that of the
- * covered work.
- */
-
-#include <assert.h>
-#include <err.h>
-#include <limits.h>
-#include <signal.h>
-#include <stdarg.h>
-#include <stdbool.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sysexits.h>
-#include <tls.h>
-#include <unistd.h>
-
-char *configPath(char *buf, size_t cap, const char *path, int i);
-FILE *configOpen(const char *path, const char *mode);
-
-#define WS "\t "
-
-#define ARRAY_LEN(a) (sizeof(a) / sizeof((a)[0]))
-
-struct Option {
-	bool set;
-	char *name;
-	char *value;
-};
-
-struct Config {
-	size_t cap, len;
-	struct Option *opts;
-};
-
-static struct Option configGet(const struct Config *config, const char *name) {
-	for (size_t i = 0; i < config->len; ++i) {
-		if (!strcmp(config->opts[i].name, name)) return config->opts[i];
-	}
-	return (struct Option) { .set = false };
-}
-
-static void
-configSet(struct Config *config, const char *name, const char *value) {
-	for (size_t i = 0; i < config->len; ++i) {
-		struct Option *opt = &config->opts[i];
-		if (strcmp(opt->name, name)) continue;
-
-		opt->set = true;
-		free(opt->value);
-		opt->value = NULL;
-		if (value) {
-			opt->value = strdup(value);
-			if (!opt->value) err(EX_OSERR, "strdup");
-		}
-		return;
-	}
-
-	if (config->len == config->cap) {
-		config->cap = (config->cap ? config->cap * 2 : 32);
-		config->opts = realloc(
-			config->opts, config->cap * sizeof(*config->opts)
-		);
-		if (!config->opts) err(EX_OSERR, "realloc");
-	}
-
-	struct Option *opt = &config->opts[config->len++];
-	opt->set = true;
-	opt->name = strdup(name);
-	if (!opt->name) err(EX_OSERR, "strdup");
-
-	opt->value = NULL;
-	if (value) {
-		opt->value = strdup(value);
-		if (!opt->value) err(EX_OSERR, "strdup");
-	}
-}
-
-static void configUnset(struct Config *config, const char *name) {
-	for (size_t i = 0; i < config->len; ++i) {
-		if (strcmp(config->opts[i].name, name)) continue;
-		config->opts[i].set = false;
-		break;
-	}
-}
-
-static void configWrite(const struct Config *config, FILE *file) {
-	int error = ftruncate(fileno(file), 0);
-	if (error) err(EX_IOERR, "ftruncate");
-
-	rewind(file);
-	fprintf(file, "# written by pounce-edit\n");
-	for (size_t i = 0; i < config->len; ++i) {
-		if (!config->opts[i].set) continue;
-		fprintf(file, "%s", config->opts[i].name);
-		if (config->opts[i].value) {
-			fprintf(file, " = %s", config->opts[i].value);
-		}
-		fprintf(file, "\n");
-		if (ferror(file)) err(EX_IOERR, "writing configuration");
-	}
-
-	error = fflush(file);
-	if (error) err(EX_IOERR, "writing configuration");
-}
-
-static void configParse(struct Config *config, const char *path) {
-	FILE *file = configOpen(path, "r");
-	if (!file) exit(EX_NOINPUT);
-
-	ssize_t llen;
-	size_t cap = 0;
-	char *buf = NULL;
-	for (size_t line = 1; 0 < (llen = getline(&buf, &cap, file)); ++line) {
-		if (buf[llen-1] == '\n') buf[--llen] = '\0';
-
-		char *name = buf + strspn(buf, WS);
-		size_t len = strcspn(name, WS "=");
-		if (!name[0] || name[0] == '#') continue;
-
-		char *equal = &name[len] + strspn(&name[len], WS);
-		if (*equal && *equal != '=') {
-			name[len] = '\0';
-			errx(
-				EX_USAGE, "%s:%zu: option `%s' missing equals sign",
-				path, line, name
-			);
-		}
-
-		char *value = NULL;
-		if (*equal) {
-			value = &equal[1] + strspn(&equal[1], WS);
-		}
-
-		name[len] = '\0';
-		configSet(config, name, value);
-	}
-	fclose(file);
-}
-
-static bool verbose;
-static struct tls *client;
-
-static void clientWrite(const char *ptr, size_t len) {
-	while (len) {
-		ssize_t ret = tls_write(client, ptr, len);
-		if (ret == TLS_WANT_POLLIN || ret == TLS_WANT_POLLOUT) continue;
-		if (ret < 0) errx(EX_IOERR, "tls_write: %s", tls_error(client));
-		ptr += ret;
-		len -= ret;
-	}
-}
-
-static void format(const char *format, ...)
-__attribute__((format(printf, 1, 2)));
-static void format(const char *format, ...) {
-	char buf[1024];
-	va_list ap;
-	va_start(ap, format);
-	int len = vsnprintf(buf, sizeof(buf), format, ap);
-	va_end(ap);
-	assert((size_t)len < sizeof(buf));
-	if (verbose) fprintf(stderr, "%s", buf);
-	clientWrite(buf, len);
-}
-
-enum { ParamCap = 2 };
-struct Message {
-	char *nick;
-	char *cmd;
-	char *params[ParamCap];
-};
-
-static struct Message parse(char *line) {
-	if (verbose) fprintf(stderr, "%s\n", line);
-	struct Message msg = {0};
-	if (line[0] == ':') {
-		char *origin = 1 + strsep(&line, " ");
-		msg.nick = strsep(&origin, "!");
-	}
-	msg.cmd = strsep(&line, " ");
-	for (size_t i = 0; line && i < ParamCap; ++i) {
-		if (line[0] == ':') {
-			msg.params[i] = &line[1];
-			break;
-		}
-		msg.params[i] = strsep(&line, " ");
-	}
-	return msg;
-}
-
-static void require(const struct Message *msg, bool nick, size_t len) {
-	if (nick && !msg->nick) errx(EX_PROTOCOL, "%s missing origin", msg->cmd);
-	for (size_t i = 0; i < len; ++i) {
-		if (msg->params[i]) continue;
-		errx(EX_PROTOCOL, "%s missing parameter %zu", msg->cmd, 1 + i);
-	}
-}
-
-typedef void Handler(struct Message *msg);
-
-static void handlePing(struct Message *msg) {
-	require(msg, false, 1);
-	format("PONG :%s\r\n", msg->params[0]);
-}
-
-static void handleError(struct Message *msg) {
-	require(msg, false, 1);
-	errx(EX_UNAVAILABLE, "%s", msg->params[0]);
-}
-
-static const char *Boolean[] = {
-	"no-names", "no-sts", "palaver", "sasl-external", "verbose",
-};
-
-static const char *Integer[] = {
-	"local-port", "port", "queue-interval", "size",
-};
-
-// FIXME: local-pass needs to be validated for hash
-// FIXME: sasl-plain needs to be validated for colon
-static const char *String[] = {
-	"away", "bind", "blind-req", "client-cert", "client-priv", "host", "join",
-	"local-ca", "local-cert", "local-host", "local-pass", "local-path",
-	"local-priv", "mode", "nick", "pass", "quit", "real", "sasl-plain", "save",
-	"trust", "user",
-};
-
-// TODO: nick, user aren't safe until pounce can fall back in case
-// they're invalid
-static const char *Safe[] = {
-	"away", "join", "local-pass", "mode", "nick", "no-names", "no-sts",
-	"palaver", "quit", "real", "user",
-};
-
-static bool allowUnsafe;
-static bool safe(const char *name) {
-	if (allowUnsafe) return true;
-	for (size_t i = 0; i < ARRAY_LEN(Safe); ++i) {
-		if (!strcmp(Safe[i], name)) return true;
-	}
-	return false;
-}
-
-static bool exists(const char *name) {
-	for (size_t i = 0; i < ARRAY_LEN(Boolean); ++i) {
-		if (!strcmp(Boolean[i], name)) return true;
-	}
-	for (size_t i = 0; i < ARRAY_LEN(Integer); ++i) {
-		if (!strcmp(Integer[i], name)) return true;
-	}
-	for (size_t i = 0; i < ARRAY_LEN(String); ++i) {
-		if (!strcmp(String[i], name)) return true;
-	}
-	return false;
-}
-
-static const char *validate(const char *name, const char *value) {
-	for (size_t i = 0; i < ARRAY_LEN(Boolean); ++i) {
-		if (strcmp(Boolean[i], name)) continue;
-		if (!safe(name)) return "cannot be set";
-		return (value ? "does not take a value" : NULL);
-	}
-	for (size_t i = 0; i < ARRAY_LEN(Integer); ++i) {
-		if (strcmp(Integer[i], name)) continue;
-		if (!safe(name)) return "cannot be set";
-		if (!value) return "requires a value";
-		char *end;
-		size_t n = strtoull(value, &end, 10);
-		if (!*value || *end) return "must be an integer";
-		if (!strcmp(name, "size") && (!n || n & (n-1))) {
-			return "must be a power of two";
-		}
-		return NULL;
-	}
-	for (size_t i = 0; i < ARRAY_LEN(String); ++i) {
-		if (strcmp(String[i], name)) continue;
-		if (!safe(name)) return "cannot be set";
-		return (value ? NULL : "requires a value");
-	}
-	return "is not an option";
-}
-
-static FILE *config;
-static struct Config over;
-static struct Config under;
-
-static void handlePrivmsg(struct Message *msg) {
-	require(msg, true, 2);
-	if (strcmp(msg->nick, msg->params[0])) return;
-
-	char *cmd = strsep(&msg->params[1], " ");
-	char *name = strsep(&msg->params[1], " ");
-	char *value = msg->params[1];
-
-	if (!strcmp(cmd, "get")) {
-		if (!name) {
-			format("NOTICE %s :set: ", msg->nick);
-			for (size_t i = 0; i < over.len; ++i) {
-				if (!over.opts[i].set) continue;
-				format("%s\2%s\2", (i ? ", " : ""), over.opts[i].name);
-			}
-			format("\r\nNOTICE %s :inherited: ", msg->nick);
-			for (size_t i = 0; i < under.len; ++i) {
-				format("%s\2%s\2", (i ? ", " : ""), under.opts[i].name);
-			}
-			format("\r\n");
-			return;
-		}
-		if (!exists(name)) {
-			format("NOTICE %s :\2%s\2 is not an option\r\n", msg->nick, name);
-			return;
-		}
-
-		struct Option opt = configGet(&over, name);
-		if (!opt.set) opt = configGet(&under, name);
-		if (opt.set && opt.value) {
-			format("NOTICE %s :\2%s\2 = %s\r\n", msg->nick, name, opt.value);
-		} else if (opt.set) {
-			format("NOTICE %s :\2%s\2 is set\r\n", msg->nick, name);
-		} else {
-			format("NOTICE %s :\2%s\2 is unset\r\n", msg->nick, name);
-		}
-
-	} else if (!strcmp(cmd, "set")) {
-		if (!name) {
-			format("NOTICE %s :options: ", msg->nick);
-			if (allowUnsafe) {
-				for (size_t i = 0; i < ARRAY_LEN(Boolean); ++i) {
-					format("%s\2%s\2", (i ? ", " : ""), Boolean[i]);
-				}
-				for (size_t i = 0; i < ARRAY_LEN(Integer); ++i) {
-					format(", \2%s\2", Integer[i]);
-				}
-				for (size_t i = 0; i < ARRAY_LEN(String); ++i) {
-					format(", \2%s\2", String[i]);
-				}
-			} else {
-				for (size_t i = 0; i < ARRAY_LEN(Safe); ++i) {
-					format("%s\2%s\2", (i ? ", " : ""), Safe[i]);
-				}
-			}
-			format("\r\n");
-			return;
-		}
-
-		const char *error = validate(name, value);
-		if (error) {
-			format("NOTICE %s :\2%s\2 %s\r\n", msg->nick, name, error);
-			return;
-		}
-		configSet(&over, name, value);
-		configWrite(&over, config);
-		format("NOTICE %s :\2%s\2 set\r\n", msg->nick, name);
-
-	} else if (!strcmp(cmd, "unset")) {
-		if (!name) {
-			format("NOTICE %s :set: ", msg->nick);
-			for (size_t i = 0; i < over.len; ++i) {
-				if (!over.opts[i].set) continue;
-				format("%s\2%s\2", (i ? ", " : ""), over.opts[i].name);
-			}
-			format("\r\n");
-			return;
-		}
-		if (!exists(name)) {
-			format("NOTICE %s :\2%s\2 is not an option\r\n", msg->nick, name);
-			return;
-		}
-		if (!safe(name)) {
-			format("NOTICE %s :\2%s\2 cannot be unset\r\n", msg->nick, name);
-			return;
-		}
-
-		configUnset(&over, name);
-		configWrite(&over, config);
-		struct Option opt = configGet(&under, name);
-		format(
-			"NOTICE %s :\2%s\2 %s\r\n",
-			msg->nick, name, (opt.set ? "inherited" : "unset")
-		);
-
-	} else if (!strcmp(cmd, "restart")) {
-		format("QUIT :pounce reloading configuration\r\n");
-	}
-}
-
-static const struct {
-	const char *cmd;
-	Handler *fn;
-} Handlers[] = {
-	{ "ERROR", handleError },
-	{ "PING", handlePing },
-	{ "PRIVMSG", handlePrivmsg },
-};
-
-static void handle(struct Message *msg) {
-	if (!msg->cmd) return;
-	for (size_t i = 0; i < ARRAY_LEN(Handlers); ++i) {
-		if (strcmp(msg->cmd, Handlers[i].cmd)) continue;
-		Handlers[i].fn(msg);
-		break;
-	}
-}
-
-static void quit(int sig) {
-	(void)sig;
-	format("QUIT\r\n");
-	tls_close(client);
-	_exit(EX_OK);
-}
-
-int main(int argc, char *argv[]) {
-	bool insecure = false;
-	const char *cert = NULL;
-	const char *priv = NULL;
-	const char *host = NULL;
-	const char *port = NULL;
-	const char *pass = NULL;
-	const char *trust = NULL;
-	const char *user = "pounce-edit";
-
-	for (int opt; 0 < (opt = getopt(argc, argv, "!ac:h:k:p:t:u:vw:"));) {
-		switch (opt) {
-			break; case '!': insecure = true;
-			break; case 'a': allowUnsafe = true;
-			break; case 'c': cert = optarg;
-			break; case 'h': host = optarg;
-			break; case 'k': priv = optarg;
-			break; case 'p': port = optarg;
-			break; case 't': trust = optarg;
-			break; case 'u': user = optarg;
-			break; case 'v': verbose = true;
-			break; case 'w': pass = optarg;
-			break; default:  return EX_USAGE;
-		}
-	}
-	if (optind == argc) errx(EX_USAGE, "config required");
-
-	for (int i = optind; i < argc-1; ++i) {
-		configParse(&under, argv[i]);
-	}
-	configParse(&over, argv[argc-1]);
-	config = configOpen(argv[argc-1], "r+");
-	if (!config) exit(EX_NOINPUT);
-
-	if (!host) {
-		struct Option opt = configGet(&over, "local-host");
-		if (!opt.set) opt = configGet(&under, "local-host");
-		if (!opt.set || !opt.value) errx(EX_USAGE, "host required");
-		host = opt.value;
-	}
-	if (!port) {
-		struct Option opt = configGet(&over, "local-port");
-		if (!opt.set) opt = configGet(&under, "local-port");
-		if (opt.set && opt.value) {
-			port = opt.value;
-		} else {
-			port = "6697";
-		}
-	}
-
-	client = tls_client();
-	if (!client) errx(EX_SOFTWARE, "tls_client");
-
-	struct tls_config *config = tls_config_new();
-	if (!config) errx(EX_SOFTWARE, "tls_config_new");
-
-	if (insecure) {
-		tls_config_insecure_noverifycert(config);
-		tls_config_insecure_noverifyname(config);
-	}
-
-	int error;
-	char path[PATH_MAX];
-	if (trust) {
-		tls_config_insecure_noverifyname(config);
-		for (int i = 0; configPath(path, sizeof(path), trust, i); ++i) {
-			error = tls_config_set_ca_file(config, path);
-			if (!error) break;
-		}
-		if (error) errx(EX_NOINPUT, "%s: %s", trust, tls_config_error(config));
-	}
-	if (cert) {
-		for (int i = 0; configPath(path, sizeof(path), cert, i); ++i) {
-			if (priv) {
-				error = tls_config_set_cert_file(config, path);
-			} else {
-				error = tls_config_set_keypair_file(config, path, path);
-			}
-			if (!error) break;
-		}
-		if (error) errx(EX_NOINPUT, "%s: %s", cert, tls_config_error(config));
-	}
-	if (priv) {
-		for (int i = 0; configPath(path, sizeof(path), priv, i); ++i) {
-			error = tls_config_set_key_file(config, path);
-			if (!error) break;
-		}
-		if (error) errx(EX_NOINPUT, "%s: %s", priv, tls_config_error(config));
-	}
-
-	error = tls_configure(client, config);
-	if (error) errx(EX_SOFTWARE, "tls_configure: %s", tls_error(client));
-	tls_config_free(config);
-
-	error = tls_connect(client, host, port);
-	if (error) errx(EX_UNAVAILABLE, "tls_connect: %s", tls_error(client));
-
-	if (pass) format("PASS :%s\r\n", pass);
-	format(
-		"CAP REQ :causal.agency/passive\r\n"
-		"CAP END\r\n"
-		"NICK *\r\n"
-		"USER %s 0 * :pounce-edit\r\n",
-		user
-	);
-
-	signal(SIGINT, quit);
-	signal(SIGTERM, quit);
-
-	size_t len = 0;
-	char buf[8191 + 512];
-	for (;;) {
-		ssize_t ret = tls_read(client, &buf[len], sizeof(buf) - len);
-		if (ret == TLS_WANT_POLLIN || ret == TLS_WANT_POLLOUT) continue;
-		if (ret < 0) errx(EX_IOERR, "tls_read: %s", tls_error(client));
-		if (!ret) errx(EX_PROTOCOL, "server closed connection");
-		len += ret;
-
-		char *line = buf;
-		for (;;) {
-			char *crlf = memmem(line, &buf[len] - line, "\r\n", 2);
-			if (!crlf) break;
-			*crlf = '\0';
-			struct Message msg = parse(line);
-			handle(&msg);
-			line = crlf + 2;
-		}
-		len -= line - buf;
-		memmove(buf, line, len);
-	}
-}