141 lines
3.1 KiB
C
141 lines
3.1 KiB
C
/* 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/>.
|
|
*/
|
|
|
|
#include <err.h>
|
|
#include <poll.h>
|
|
#include <signal.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <sys/wait.h>
|
|
#include <sysexits.h>
|
|
#include <unistd.h>
|
|
#include <errno.h>
|
|
|
|
#include "chat.h"
|
|
|
|
static struct {
|
|
bool wait;
|
|
bool pipe;
|
|
int fd;
|
|
} spawn;
|
|
|
|
void eventWait(const char *argv[static 2]) {
|
|
uiHide();
|
|
pid_t pid = fork();
|
|
if (pid < 0) err(EX_OSERR, "fork");
|
|
if (!pid) {
|
|
execvp(argv[0], (char *const *)argv);
|
|
err(EX_CONFIG, "%s", argv[0]);
|
|
}
|
|
spawn.wait = true;
|
|
}
|
|
|
|
void eventPipe(const char *argv[static 2]) {
|
|
if (spawn.pipe) {
|
|
uiLog(TagStatus, UIHot, L"event: 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], (char *const *)argv);
|
|
perror(argv[0]);
|
|
exit(EX_CONFIG);
|
|
}
|
|
|
|
close(rw[1]);
|
|
spawn.fd = rw[0];
|
|
spawn.pipe = true;
|
|
}
|
|
|
|
static void pipeRead(void) {
|
|
char buf[256];
|
|
ssize_t len = read(spawn.fd, buf, sizeof(buf) - 1);
|
|
if (len < 0) err(EX_IOERR, "read");
|
|
if (len) {
|
|
buf[len] = '\0';
|
|
len = strcspn(buf, "\n");
|
|
uiFmt(TagStatus, UIHot, "event: %.*s", (int)len, buf);
|
|
} else {
|
|
close(spawn.fd);
|
|
spawn.pipe = false;
|
|
}
|
|
}
|
|
|
|
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(TagStatus, UIHot, "event: exit %d", WEXITSTATUS(status));
|
|
} else if (WIFSIGNALED(status)) {
|
|
uiFmt(TagStatus, UIHot, "event: signal %d", WTERMSIG(status));
|
|
}
|
|
spawn.wait = false;
|
|
}
|
|
|
|
static void sigint(int sig) {
|
|
(void)sig;
|
|
input(TagStatus, "/quit");
|
|
uiExit();
|
|
exit(EX_OK);
|
|
}
|
|
|
|
void eventLoop(int ui, int irc) {
|
|
signal(SIGINT, sigint);
|
|
signal(SIGCHLD, sigchld);
|
|
|
|
struct pollfd fds[3] = {
|
|
{ irc, POLLIN, 0 },
|
|
{ ui, POLLIN, 0 },
|
|
{ -1, POLLIN, 0 },
|
|
};
|
|
for (;;) {
|
|
nfds_t nfds = 2;
|
|
if (spawn.wait) nfds = 1;
|
|
if (spawn.pipe) {
|
|
fds[2].fd = spawn.fd;
|
|
nfds = 3;
|
|
}
|
|
|
|
int ready = poll(fds, nfds, -1);
|
|
if (ready < 0) {
|
|
if (errno != EINTR) err(EX_IOERR, "poll");
|
|
uiRead();
|
|
uiDraw();
|
|
continue;
|
|
}
|
|
|
|
if (fds[0].revents) ircRead();
|
|
if (nfds > 1 && fds[1].revents) uiRead();
|
|
if (nfds > 2 && fds[2].revents) pipeRead();
|
|
|
|
if (nfds > 1) uiDraw();
|
|
}
|
|
}
|