Kristian Høgsberg
14 years ago
parent
57eca7424a
commit
27da538ab5
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/*
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* Copyright © 2011 Intel Corporation |
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* |
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* Permission to use, copy, modify, distribute, and sell this software and |
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* its documentation for any purpose is hereby granted without fee, provided |
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* that the above copyright notice appear in all copies and that both that |
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* copyright notice and this permission notice appear in supporting |
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* documentation, and that the name of the copyright holders not be used in |
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* advertising or publicity pertaining to distribution of the software |
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* without specific, written prior permission. The copyright holders make |
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* no representations about the suitability of this software for any |
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* purpose. It is provided "as is" without express or implied warranty. |
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* |
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* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS |
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* SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND |
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* FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY |
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* SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER |
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* RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF |
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* CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN |
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* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
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*/ |
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#define _GNU_SOURCE |
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#include <stdlib.h> |
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#include <stdio.h> |
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#include <string.h> |
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#include <sys/socket.h> |
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#include <sys/un.h> |
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#include <fcntl.h> |
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#include <errno.h> |
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#include <unistd.h> |
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#include <xcb/xcb.h> |
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#include <wayland-server.h> |
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#include "compositor.h" |
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/*
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* TODO: |
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* - Clean X socket and lock file on exit |
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* - Nuke lock file if process doesn't exist. |
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*/ |
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struct wlsc_xserver { |
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struct wl_display *wl_display; |
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struct wl_event_loop *loop; |
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struct wl_event_source *source; |
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struct wl_event_source *sigchld_source; |
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struct wl_client *client; |
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int fd; |
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struct sockaddr_un addr; |
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char lock_addr[113]; |
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int display; |
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struct wlsc_process process; |
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}; |
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static int |
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wlsc_xserver_handle_event(int listen_fd, uint32_t mask, void *data) |
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{ |
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struct wlsc_xserver *mxs = data; |
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char listen_fd_str[8], display[8], s[8]; |
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int sv[2], flags; |
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if (socketpair(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC, 0, sv) < 0) { |
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fprintf(stderr, "socketpair failed\n"); |
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return 1; |
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} |
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mxs->process.pid = fork(); |
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switch (mxs->process.pid) { |
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case 0: |
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/* SOCK_CLOEXEC closes both ends, so we need to unset
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* the flag on the client fd. */ |
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flags = fcntl(sv[1], F_GETFD); |
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if (flags != -1) |
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fcntl(sv[1], F_SETFD, flags & ~FD_CLOEXEC); |
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flags = fcntl(listen_fd, F_GETFD); |
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if (flags != -1) |
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fcntl(listen_fd, F_SETFD, flags & ~FD_CLOEXEC); |
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snprintf(s, sizeof s, "%d", sv[1]); |
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setenv("WAYLAND_SOCKET", s, 1); |
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snprintf(listen_fd_str, sizeof listen_fd_str, "%d", listen_fd); |
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snprintf(display, sizeof display, ":%d", mxs->display); |
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if (execl("/usr/bin/Xorg", |
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"/usr/bin/Xorg", |
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display, |
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"-wayland", |
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// "-rootless",
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"-retro", |
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"-logfile", "/tmp/foo", |
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"-terminate", |
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"-socket", listen_fd_str, |
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NULL) < 0) |
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fprintf(stderr, "exec failed: %m\n"); |
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exit(-1); |
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default: |
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fprintf(stderr, "forked X server, pid %d\n", mxs->process.pid); |
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close(sv[1]); |
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mxs->client = wl_client_create(mxs->wl_display, sv[0]); |
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wlsc_watch_process(&mxs->process); |
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wl_event_source_remove(mxs->source); |
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break; |
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case -1: |
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fprintf(stderr, "failed to fork\n"); |
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break; |
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} |
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return 1; |
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} |
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static void |
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wlsc_xserver_cleanup(struct wlsc_process *process, int status) |
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{ |
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struct wlsc_xserver *mxs = |
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container_of(process, struct wlsc_xserver, process); |
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fprintf(stderr, "xserver exited, code %d\n", status); |
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mxs->process.pid = 0; |
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mxs->source = |
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wl_event_loop_add_fd(mxs->loop, mxs->fd, WL_EVENT_READABLE, |
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wlsc_xserver_handle_event, mxs); |
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} |
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int |
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wlsc_xserver_init(struct wl_display *display) |
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{ |
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struct wlsc_xserver *mxs; |
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char lockfile[256], pid[16]; |
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socklen_t size, name_size; |
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int fd; |
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mxs = malloc(sizeof *mxs); |
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memset(mxs, 0, sizeof mxs); |
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mxs->process.cleanup = wlsc_xserver_cleanup; |
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mxs->wl_display = display; |
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mxs->addr.sun_family = AF_LOCAL; |
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mxs->fd = socket(PF_LOCAL, SOCK_STREAM | SOCK_CLOEXEC, 0); |
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if (mxs->fd < 0) { |
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free(mxs); |
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return -1; |
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} |
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mxs->display = 0; |
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do { |
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snprintf(lockfile, sizeof lockfile, |
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"/tmp/.X%d-lock", mxs->display); |
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fd = open(lockfile, |
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O_WRONLY | O_CLOEXEC | O_CREAT | O_EXCL, 0444); |
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if (fd < 0 && errno == EEXIST) { |
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fprintf(stderr, "server %d exists\n", mxs->display); |
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mxs->display++; |
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continue; |
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} else if (fd < 0) { |
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close(mxs->fd); |
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free(mxs); |
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return -1; |
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} |
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size = snprintf(pid, sizeof pid, "%10d\n", getpid()); |
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write(fd, pid, size); |
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close(fd); |
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name_size = snprintf(mxs->addr.sun_path, |
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sizeof mxs->addr.sun_path, |
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"/tmp/.X11-unix/X%d", mxs->display) + 1; |
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size = offsetof(struct sockaddr_un, sun_path) + name_size; |
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if (bind(mxs->fd, (struct sockaddr *) &mxs->addr, size) < 0) { |
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fprintf(stderr, "failed to bind to %s (%m)\n", |
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mxs->addr.sun_path); |
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unlink(lockfile); |
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close(mxs->fd); |
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free(mxs); |
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return -1; |
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} |
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break; |
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} while (errno != 0); |
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fprintf(stderr, "listening on display %d\n", mxs->display); |
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if (listen(mxs->fd, 1) < 0) { |
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unlink(mxs->addr.sun_path); |
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unlink(lockfile); |
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close(mxs->fd); |
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free(mxs); |
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return -1; |
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} |
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mxs->loop = wl_display_get_event_loop(display); |
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mxs->source = |
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wl_event_loop_add_fd(mxs->loop, mxs->fd, WL_EVENT_READABLE, |
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wlsc_xserver_handle_event, mxs); |
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return 0; |
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} |
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