summary refs log tree commit diff
path: root/chat.c
blob: 4577bb70abca28de3768d751eb8f5350fc80140d (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
/* Copyright (C) 2020  C. 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/>.
 */

#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <locale.h>
#include <poll.h>
#include <signal.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/wait.h>
#include <sysexits.h>
#include <unistd.h>

#include "chat.h"

char *idNames[IDCap] = {
	[None] = "<none>",
	[Debug] = "<debug>",
	[Network] = "<network>",
};

enum Color idColors[IDCap] = {
	[None] = Black,
	[Debug] = Green,
	[Network] = Gray,
};

size_t idNext = Network + 1;

struct Self self = { .color = Default };

static const char *save;
static void exitSave(void) {
	int error = uiSave(save);
	if (error) {
		warn("%s", save);
		_exit(EX_IOERR);
	}
}

uint32_t hashInit;

int procPipe[2] = { -1, -1 };

static void pipeRead(void) {
	char buf[1024];
	ssize_t len = read(procPipe[0], buf, sizeof(buf) - 1);
	if (len < 0) err(EX_IOERR, "read");
	if (!len) return;
	buf[len - 1] = '\0';
	char *ptr = buf;
	while (ptr) {
		char *line = strsep(&ptr, "\n");
		uiFormat(Network, Warm, NULL, "%s", line);
	}
}

static volatile sig_atomic_t signals[NSIG];
static void signalHandler(int signal) {
	signals[signal] = 1;
}

int main(int argc, char *argv[]) {
	setlocale(LC_CTYPE, "");

	bool insecure = false;
	const char *host = NULL;
	const char *port = "6697";
	const char *cert = NULL;
	const char *priv = NULL;

	bool sasl = false;
	const char *pass = NULL;
	const char *nick = NULL;
	const char *user = NULL;
	const char *real = NULL;

	const char *Opts = "!C:H:O:a:c:eh:j:k:n:p:r:s:u:vw:";
	const struct option LongOpts[] = {
		{ "insecure", no_argument, NULL, '!' },
		{ "copy", required_argument, NULL, 'C' },
		{ "hash", required_argument, NULL, 'H' },
		{ "open", required_argument, NULL, 'O' },
		{ "sasl-plain", required_argument, NULL, 'a' },
		{ "cert", required_argument, NULL, 'c' },
		{ "sasl-external", no_argument, NULL, 'e' },
		{ "host", required_argument, NULL, 'h' },
		{ "join", required_argument, NULL, 'j' },
		{ "priv", required_argument, NULL, 'k' },
		{ "nick", required_argument, NULL, 'n' },
		{ "port", required_argument, NULL, 'p' },
		{ "real", required_argument, NULL, 'r' },
		{ "save", required_argument, NULL, 's' },
		{ "user", required_argument, NULL, 'u' },
		{ "debug", no_argument, NULL, 'v' },
		{ "pass", required_argument, NULL, 'w' },
		{0},
	};

	int opt;
	while (0 < (opt = getopt_config(argc, argv, Opts, LongOpts, NULL))) {
		switch (opt) {
			break; case '!': insecure = true;
			break; case 'C': urlCopyUtil = optarg;
			break; case 'H': hashInit = strtoul(optarg, NULL, 0);
			break; case 'O': urlOpenUtil = optarg;
			break; case 'a': sasl = true; self.plain = optarg;
			break; case 'c': cert = optarg;
			break; case 'e': sasl = true;
			break; case 'h': host = optarg;
			break; case 'j': self.join = optarg;
			break; case 'k': priv = optarg;
			break; case 'n': nick = optarg;
			break; case 'p': port = optarg;
			break; case 'r': real = optarg;
			break; case 's': save = optarg;
			break; case 'u': user = optarg;
			break; case 'v': self.debug = true;
			break; case 'w': pass = optarg;
			break; default:  return EX_USAGE;
		}
	}
	if (!host) errx(EX_USAGE, "host required");

	if (!nick) nick = getenv("USER");
	if (!nick) errx(EX_CONFIG, "USER unset");
	if (!user) user = nick;
	if (!real) real = nick;

	set(&self.nick, "*");
	set(&self.network, host);
	set(&self.chanTypes, "#&");
	set(&self.prefixes, "@+");
	commandComplete();

	FILE *certFile = NULL;
	FILE *privFile = NULL;
	if (cert) {
		certFile = configOpen(cert, "r");
		if (!certFile) return EX_NOINPUT;
	}
	if (priv) {
		privFile = configOpen(priv, "r");
		if (!privFile) return EX_NOINPUT;
	}
	ircConfig(insecure, certFile, privFile);
	if (certFile) fclose(certFile);
	if (privFile) fclose(privFile);

	uiInit();
	if (save) {
		uiLoad(save);
		atexit(exitSave);
	}
	uiShowID(Network);
	uiFormat(
		Network, Cold, NULL,
		"\3%dcatgirl\3\tis GPLv3 fwee softwawe ^w^  "
		"code is avaiwable fwom https://git.causal.agency/catgirl",
		Pink
	);
	uiFormat(Network, Cold, NULL, "Traveling...");
	uiDraw();
	
	int irc = ircConnect(host, port);
	if (pass) ircFormat("PASS :%s\r\n", pass);
	if (sasl) ircFormat("CAP REQ :sasl\r\n");
	ircFormat("CAP LS\r\n");
	ircFormat("NICK :%s\r\n", nick);
	ircFormat("USER %s 0 * :%s\r\n", user, real);

	signal(SIGHUP, signalHandler);
	signal(SIGINT, signalHandler);
	signal(SIGTERM, signalHandler);
	signal(SIGCHLD, signalHandler);
	sig_t cursesWinch = signal(SIGWINCH, signalHandler);

	int error = pipe(procPipe);
	if (error) err(EX_OSERR, "pipe");

	fcntl(irc, F_SETFD, FD_CLOEXEC);
	fcntl(procPipe[0], F_SETFD, FD_CLOEXEC);
	fcntl(procPipe[1], F_SETFD, FD_CLOEXEC);

	struct pollfd fds[3] = {
		{ .events = POLLIN, .fd = STDIN_FILENO },
		{ .events = POLLIN, .fd = irc },
		{ .events = POLLIN, .fd = procPipe[0] },
	};
	while (!self.quit) {
		int nfds = poll(fds, ARRAY_LEN(fds), -1);
		if (nfds < 0 && errno != EINTR) err(EX_IOERR, "poll");
		if (nfds > 0) {
			if (fds[0].revents) uiRead();
			if (fds[1].revents) ircRecv();
			if (fds[2].revents) pipeRead();
		}

		if (signals[SIGHUP]) self.quit = "zzz";
		if (signals[SIGINT] || signals[SIGTERM]) break;

		if (signals[SIGCHLD]) {
			signals[SIGCHLD] = 0;
			int status;
			while (0 < waitpid(-1, &status, WNOHANG)) {
				if (WIFEXITED(status) && WEXITSTATUS(status)) {
					uiFormat(
						Network, Warm, NULL,
						"Process exits with status %d", WEXITSTATUS(status)
					);
				} else if (WIFSIGNALED(status)) {
					uiFormat(
						Network, Warm, NULL,
						"Process terminates from %s",
						strsignal(WTERMSIG(status))
					);
				}
			}
			uiShow();
		}

		if (signals[SIGWINCH]) {
			signals[SIGWINCH] = 0;
			cursesWinch(SIGWINCH);
			// XXX: For some reason, calling uiDraw() here is the only way to
			// get uiRead() to properly receive KEY_RESIZE.
			uiDraw();
			uiRead();
		}

		uiDraw();
	}

	if (self.quit) {
		ircFormat("QUIT :%s\r\n", self.quit);
	} else {
		ircFormat("QUIT\r\n");
	}
	struct Message msg = {
		.nick = self.nick,
		.user = self.user,
		.cmd = "QUIT",
		.params[0] = self.quit,
	};
	handle(msg);

	uiHide();
}