diff options
| -rw-r--r-- | include/wlr/xwayland.h | 1 | ||||
| -rw-r--r-- | xwayland/xwayland.c | 82 |
2 files changed, 58 insertions, 25 deletions
diff --git a/include/wlr/xwayland.h b/include/wlr/xwayland.h index 804e9962..a0fb34ce 100644 --- a/include/wlr/xwayland.h +++ b/include/wlr/xwayland.h @@ -1,7 +1,6 @@ #ifndef _WLR_XWAYLAND_H #define _WLR_XWAYLAND_H #include <time.h> -#include <sys/types.h> #include <stdbool.h> #include <wlr/types/wlr_compositor.h> #include <xcb/xcb.h> diff --git a/xwayland/xwayland.c b/xwayland/xwayland.c index 211e2a04..bed2e00e 100644 --- a/xwayland/xwayland.c +++ b/xwayland/xwayland.c @@ -57,7 +57,7 @@ static void exec_xwayland(struct wlr_xwayland *wlr_xwayland) { unset_cloexec(wlr_xwayland->x_fd[1]) || unset_cloexec(wlr_xwayland->wm_fd[1]) || unset_cloexec(wlr_xwayland->wl_fd[1])) { - exit(EXIT_FAILURE); + _exit(EXIT_FAILURE); } /* Make Xwayland signal us when it's ready */ @@ -77,18 +77,18 @@ static void exec_xwayland(struct wlr_xwayland *wlr_xwayland) { fill_arg(&cur_arg, "%d", wlr_xwayland->x_fd[1]) < 0 || fill_arg(&cur_arg, "%d", wlr_xwayland->wm_fd[1]) < 0) { wlr_log_errno(L_ERROR, "alloc/print failure"); - exit(EXIT_FAILURE); + _exit(EXIT_FAILURE); } const char *xdg_runtime = getenv("XDG_RUNTIME_DIR"); if (!xdg_runtime) { wlr_log(L_ERROR, "XDG_RUNTIME_DIR is not set"); - exit(EXIT_FAILURE); + _exit(EXIT_FAILURE); } if (clearenv()) { wlr_log_errno(L_ERROR, "clearenv failed"); - exit(EXIT_FAILURE); + _exit(EXIT_FAILURE); } setenv("XDG_RUNTIME_DIR", xdg_runtime, true); char wayland_socket_str[16]; @@ -150,12 +150,23 @@ static void wlr_xwayland_finish(struct wlr_xwayland *wlr_xwayland) { * after we close our side of the wm/wl fds. This is more reliable * than trying to kill something that might no longer be Xwayland. */ - // TODO: figure how to wait for dying process though. Probably handle SIGCHILD } static int xserver_handle_ready(int signal_number, void *data) { struct wlr_xwayland *wlr_xwayland = data; + int stat_val = -1; + while (waitpid(wlr_xwayland->pid, &stat_val, 0) < 0) { + if (errno == EINTR) { + continue; + } + wlr_log_errno(L_ERROR, "waitpid for Xwayland fork failed"); + return 1; + } + if (stat_val) { + wlr_log(L_ERROR, "Xwayland startup failed, not setting up xwm"); + return 1; + } wlr_log(L_DEBUG, "Xserver is ready"); wlr_xwayland->xwm = xwm_create(wlr_xwayland); @@ -196,12 +207,50 @@ static bool wlr_xwayland_init(struct wlr_xwayland *wlr_xwayland, return false; } - if ((wlr_xwayland->pid = fork()) == 0) { - exec_xwayland(wlr_xwayland); - wlr_log_errno(L_ERROR, "execvpe failed"); - exit(EXIT_FAILURE); + wlr_xwayland->server_start = time(NULL); + + if (!(wlr_xwayland->client = wl_client_create(wl_display, wlr_xwayland->wl_fd[0]))) { + wlr_log_errno(L_ERROR, "wl_client_create failed"); + wlr_xwayland_finish(wlr_xwayland); + return false; } + wlr_xwayland->wl_fd[0] = -1; /* not ours anymore */ + + wlr_xwayland->destroy_listener.notify = xwayland_destroy_event; + wl_client_add_destroy_listener(wlr_xwayland->client, &wlr_xwayland->destroy_listener); + + struct wl_event_loop *loop = wl_display_get_event_loop(wl_display); + wlr_xwayland->sigusr1_source = wl_event_loop_add_signal(loop, SIGUSR1, xserver_handle_ready, wlr_xwayland); + if ((wlr_xwayland->pid = fork()) == 0) { + /* Double-fork, but we need to forward SIGUSR1 once Xserver(1) + * is ready, or error if there was one. */ + pid_t pid, ppid; + sigset_t sigset; + int sig; + ppid = getppid(); + sigemptyset(&sigset); + sigaddset(&sigset, SIGUSR1); + sigaddset(&sigset, SIGCHLD); + sigprocmask(SIG_BLOCK, &sigset, NULL); + if ((pid = fork()) == 0) { + exec_xwayland(wlr_xwayland); + wlr_log_errno(L_ERROR, "failed to exec Xwayland"); + _exit(EXIT_FAILURE); + } + if (pid < 0) { + wlr_log_errno(L_ERROR, "second fork failed"); + _exit(EXIT_FAILURE); + } + sigwait(&sigset, &sig); + kill(ppid, SIGUSR1); + wlr_log(L_DEBUG, "sent SIGUSR1 to process %d", ppid); + if (sig == SIGCHLD) { + waitpid(pid, NULL, 0); + _exit(EXIT_FAILURE); + } + _exit(EXIT_SUCCESS); + } if (wlr_xwayland->pid < 0) { wlr_log_errno(L_ERROR, "fork failed"); wlr_xwayland_finish(wlr_xwayland); @@ -216,21 +265,6 @@ static bool wlr_xwayland_init(struct wlr_xwayland *wlr_xwayland, wlr_xwayland->x_fd[0] = wlr_xwayland->x_fd[1] = -1; wlr_xwayland->wl_fd[1] = wlr_xwayland->wm_fd[1] = -1; - wlr_xwayland->server_start = time(NULL); - - if (!(wlr_xwayland->client = wl_client_create(wl_display, wlr_xwayland->wl_fd[0]))) { - wlr_log_errno(L_ERROR, "wl_client_create failed"); - wlr_xwayland_finish(wlr_xwayland); - return false; - } - wlr_xwayland->wl_fd[0] = -1; /* not ours anymore */ - - wlr_xwayland->destroy_listener.notify = xwayland_destroy_event; - wl_client_add_destroy_listener(wlr_xwayland->client, &wlr_xwayland->destroy_listener); - - struct wl_event_loop *loop = wl_display_get_event_loop(wl_display); - wlr_xwayland->sigusr1_source = wl_event_loop_add_signal(loop, SIGUSR1, xserver_handle_ready, wlr_xwayland); - return true; } |