commit - 7018345e07c0a8b71442b79572da308c75f7cd02
commit + 59ef79dd19611c7846b00427e6f2267c748ae290
blob - /dev/null
blob + dd237f5f937a5f6cedda98d6050a81eee388f594 (mode 644)
--- /dev/null
+++ control.c
+/* $OpenBSD: control.c,v 1.4 2021/08/01 09:07:03 florian Exp $ */
+
+/*
+ * Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include "compat.h"
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/socket.h>
+#include <sys/uio.h>
+#include <sys/un.h>
+
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "control.h"
+#include "minibuffer.h"
+#include "session.h"
+#include "telescope.h"
+#include "utils.h"
+#include "ui.h"
+
+#define CONTROL_BACKLOG 5
+
+struct {
+ struct event ev;
+ struct event evt;
+ int fd;
+} control_state = {.fd = -1};
+
+struct ctl_conn {
+ TAILQ_ENTRY(ctl_conn) entry;
+ struct imsgev iev;
+};
+
+struct ctl_conn *control_connbyfd(int);
+struct ctl_conn *control_connbypid(pid_t);
+void control_close(int);
+
+TAILQ_HEAD(ctl_conns, ctl_conn) ctl_conns = TAILQ_HEAD_INITIALIZER(ctl_conns);
+
+int
+control_init(char *path)
+{
+ struct sockaddr_un sun;
+ int fd;
+ mode_t old_umask;
+
+ if ((fd = socket(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC | SOCK_NONBLOCK,
+ 0)) == -1) {
+ warn("%s: socket", __func__);
+ return (-1);
+ }
+
+ memset(&sun, 0, sizeof(sun));
+ sun.sun_family = AF_UNIX;
+ strlcpy(sun.sun_path, path, sizeof(sun.sun_path));
+
+ if (unlink(path) == -1)
+ if (errno != ENOENT) {
+ warn("%s: unlink %s", __func__, path);
+ close(fd);
+ return (-1);
+ }
+
+ old_umask = umask(S_IXUSR|S_IXGRP|S_IWOTH|S_IROTH|S_IXOTH);
+ if (bind(fd, (struct sockaddr *)&sun, sizeof(sun)) == -1) {
+ warn("%s: bind: %s", __func__, path);
+ close(fd);
+ umask(old_umask);
+ return (-1);
+ }
+ umask(old_umask);
+
+ if (chmod(path, S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP) == -1) {
+ warn("%s: chmod", __func__);
+ close(fd);
+ (void)unlink(path);
+ return (-1);
+ }
+
+ return (fd);
+}
+
+int
+control_listen(int fd)
+{
+ control_state.fd = fd;
+ if (listen(control_state.fd, CONTROL_BACKLOG) == -1) {
+ warn("%s: listen", __func__);
+ return (-1);
+ }
+
+ event_set(&control_state.ev, control_state.fd, EV_READ,
+ control_accept, NULL);
+ event_add(&control_state.ev, NULL);
+ evtimer_set(&control_state.evt, control_accept, NULL);
+
+ return (0);
+}
+
+void
+control_accept(int listenfd, short event, void *bula)
+{
+ int connfd;
+ socklen_t len;
+ struct sockaddr_un sun;
+ struct ctl_conn *c;
+
+ event_add(&control_state.ev, NULL);
+ if ((event & EV_TIMEOUT))
+ return;
+
+ len = sizeof(sun);
+ if ((connfd = accept4(listenfd, (struct sockaddr *)&sun, &len,
+ SOCK_CLOEXEC | SOCK_NONBLOCK)) == -1) {
+ /*
+ * Pause accept if we are out of file descriptors, or
+ * libevent will haunt us here too.
+ */
+ if (errno == ENFILE || errno == EMFILE) {
+ struct timeval evtpause = { 1, 0 };
+
+ event_del(&control_state.ev);
+ evtimer_add(&control_state.evt, &evtpause);
+ } else if (errno != EWOULDBLOCK && errno != EINTR &&
+ errno != ECONNABORTED)
+ message("%s: accept4: %s", __func__, strerror(errno));
+ return;
+ }
+
+ if ((c = calloc(1, sizeof(struct ctl_conn))) == NULL) {
+ message("%s: calloc: %s", __func__, strerror(errno));
+ close(connfd);
+ return;
+ }
+
+ imsg_init(&c->iev.ibuf, connfd);
+ c->iev.handler = control_dispatch_imsg;
+ c->iev.events = EV_READ;
+ event_set(&c->iev.ev, c->iev.ibuf.fd, c->iev.events,
+ c->iev.handler, &c->iev);
+ event_add(&c->iev.ev, NULL);
+
+ TAILQ_INSERT_TAIL(&ctl_conns, c, entry);
+}
+
+struct ctl_conn *
+control_connbyfd(int fd)
+{
+ struct ctl_conn *c;
+
+ TAILQ_FOREACH(c, &ctl_conns, entry) {
+ if (c->iev.ibuf.fd == fd)
+ break;
+ }
+
+ return (c);
+}
+
+struct ctl_conn *
+control_connbypid(pid_t pid)
+{
+ struct ctl_conn *c;
+
+ TAILQ_FOREACH(c, &ctl_conns, entry) {
+ if (c->iev.ibuf.pid == pid)
+ break;
+ }
+
+ return (c);
+}
+
+void
+control_close(int fd)
+{
+ struct ctl_conn *c;
+
+ if ((c = control_connbyfd(fd)) == NULL) {
+ message("%s: fd %d: not found", __func__, fd);
+ return;
+ }
+
+ msgbuf_clear(&c->iev.ibuf.w);
+ TAILQ_REMOVE(&ctl_conns, c, entry);
+
+ event_del(&c->iev.ev);
+ close(c->iev.ibuf.fd);
+
+ /* Some file descriptors are available again. */
+ if (evtimer_pending(&control_state.evt, NULL)) {
+ evtimer_del(&control_state.evt);
+ event_add(&control_state.ev, NULL);
+ }
+
+ free(c);
+}
+
+void
+control_dispatch_imsg(int fd, short event, void *bula)
+{
+ struct ctl_conn *c;
+ struct imsg imsg;
+ ssize_t n;
+
+ if ((c = control_connbyfd(fd)) == NULL) {
+ message("%s: fd %d: not found", __func__, fd);
+ return;
+ }
+
+ if (event & EV_READ) {
+ if (((n = imsg_read(&c->iev.ibuf)) == -1 && errno != EAGAIN) ||
+ n == 0) {
+ control_close(fd);
+ return;
+ }
+ }
+ if (event & EV_WRITE) {
+ if (msgbuf_write(&c->iev.ibuf.w) <= 0 && errno != EAGAIN) {
+ control_close(fd);
+ return;
+ }
+ }
+
+ for (;;) {
+ if ((n = imsg_get(&c->iev.ibuf, &imsg)) == -1) {
+ control_close(fd);
+ return;
+ }
+ if (n == 0)
+ break;
+
+ switch (imsg.hdr.type) {
+ case IMSG_CTL_OPEN_URL: {
+ char uri[GEMINI_URL_LEN] = { 0 };
+
+ if (IMSG_DATA_SIZE(imsg) > sizeof(uri)-1)
+ break;
+ memcpy(uri, imsg.data, sizeof(uri));
+ if (uri[IMSG_DATA_SIZE(imsg)-1] != '\0')
+ break;
+
+ new_tab(uri, NULL, NULL);
+ ui_on_tab_refresh(current_tab);
+ break;
+ }
+ default:
+ message("%s: error handling imsg %d", __func__,
+ imsg.hdr.type);
+ break;
+ }
+ imsg_free(&imsg);
+ }
+
+ imsg_event_add(&c->iev);
+}
+
+int
+control_imsg_relay(struct imsg *imsg)
+{
+ struct ctl_conn *c;
+
+ if ((c = control_connbypid(imsg->hdr.pid)) == NULL)
+ return (0);
+
+ return (imsg_compose_event(&c->iev, imsg->hdr.type, 0, imsg->hdr.pid,
+ -1, imsg->data, IMSG_DATA_SIZE(*imsg)));
+}
blob - /dev/null
blob + 5ad6237eabf828acb8fd405cb743da353c800c69 (mode 644)
--- /dev/null
+++ include/control.h
+/* $OpenBSD: control.h,v 1.1 2021/02/26 16:16:37 florian Exp $ */
+
+/*
+ * Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#ifndef SMALL
+int control_init(char *);
+int control_listen(int);
+void control_accept(int, short, void *);
+void control_dispatch_imsg(int, short, void *);
+int control_imsg_relay(struct imsg *);
+#endif /* SMALL */
