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/* Copyright (C) 2018 Curtis McEnroe <june@causal.agency>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#define _WITH_GETLINE
#include <err.h>
#include <errno.h>
#include <poll.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sysexits.h>
#include <unistd.h>
#include <sys/wait.h>
#include "chat.h"
void selfNick(const char *nick) {
free(self.nick);
self.nick = strdup(nick);
if (!self.nick) err(EX_OSERR, "strdup");
}
void selfUser(const char *user) {
free(self.user);
self.user = strdup(user);
if (!self.user) err(EX_OSERR, "strdup");
}
void selfJoin(const char *join) {
free(self.join);
self.join = strdup(join);
if (!self.join) err(EX_OSERR, "strdup");
}
static union {
struct {
struct pollfd ui;
struct pollfd irc;
struct pollfd pipe;
};
struct pollfd fds[3];
} fds = {
.ui = { .events = POLLIN, .fd = STDIN_FILENO },
.irc = { .events = POLLIN },
.pipe = { .events = 0 },
};
void spawn(char *const argv[]) {
if (fds.pipe.events) {
uiLog(TAG_DEFAULT, L"spawn: existing pipe");
return;
}
int rw[2];
int error = pipe(rw);
if (error) err(EX_OSERR, "pipe");
pid_t pid = fork();
if (pid < 0) err(EX_OSERR, "fork");
if (!pid) {
close(rw[0]);
close(STDIN_FILENO);
dup2(rw[1], STDOUT_FILENO);
dup2(rw[1], STDERR_FILENO);
close(rw[1]);
execvp(argv[0], argv);
perror(argv[0]);
exit(EX_CONFIG);
}
close(rw[1]);
fds.pipe.fd = rw[0];
fds.pipe.events = POLLIN;
}
static void pipeRead(void) {
char buf[256];
ssize_t len = read(fds.pipe.fd, buf, sizeof(buf) - 1);
if (len < 0) err(EX_IOERR, "read");
if (len) {
buf[len] = '\0';
len = strcspn(buf, "\n");
uiFmt(TAG_DEFAULT, "%.*s", (int)len, buf);
} else {
close(fds.pipe.fd);
fds.pipe.events = 0;
fds.pipe.revents = 0;
}
}
static void eventLoop(void) {
for (;;) {
uiDraw();
int n = poll(fds.fds, (fds.pipe.events ? 3 : 2), -1);
if (n < 0) {
if (errno != EINTR) err(EX_IOERR, "poll");
uiRead();
continue;
}
if (fds.ui.revents) uiRead();
if (fds.irc.revents) ircRead();
if (fds.pipe.revents) pipeRead();
}
}
static void sigchld(int sig) {
(void)sig;
int status;
pid_t pid = wait(&status);
if (pid < 0) err(EX_OSERR, "wait");
if (WIFEXITED(status) && WEXITSTATUS(status)) {
uiFmt(TAG_DEFAULT, "spawn: exit %d", WEXITSTATUS(status));
} else if (WIFSIGNALED(status)) {
uiFmt(TAG_DEFAULT, "spawn: signal %d", WTERMSIG(status));
}
}
static void sigint(int sig) {
(void)sig;
input(TAG_DEFAULT, "/quit");
uiExit();
exit(EX_OK);
}
static char *prompt(const char *prompt) {
char *line = NULL;
size_t cap;
for (;;) {
printf("%s", prompt);
fflush(stdout);
ssize_t len = getline(&line, &cap, stdin);
if (ferror(stdin)) err(EX_IOERR, "getline");
if (feof(stdin)) exit(EX_OK);
if (len < 2) continue;
line[len - 1] = '\0';
return line;
}
}
int main(int argc, char *argv[]) {
char *host = NULL;
const char *port = "6697";
const char *pass = NULL;
const char *webirc = NULL;
int opt;
while (0 < (opt = getopt(argc, argv, "W:h:j:n:p:u:vw:"))) {
switch (opt) {
break; case 'W': webirc = optarg;
break; case 'h': host = strdup(optarg);
break; case 'j': selfJoin(optarg);
break; case 'n': selfNick(optarg);
break; case 'p': port = optarg;
break; case 'u': selfUser(optarg);
break; case 'v': self.verbose = true;
break; case 'w': pass = optarg;
break; default: return EX_USAGE;
}
}
if (!host) host = prompt("Host: ");
if (!self.nick) self.nick = prompt("Name: ");
if (!self.user) selfUser(self.nick);
inputTab();
uiInit();
uiLog(TAG_DEFAULT, L"Traveling...");
uiDraw();
fds.irc.fd = ircConnect(host, port, pass, webirc);
free(host);
signal(SIGINT, sigint);
signal(SIGCHLD, sigchld);
eventLoop();
}
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