wlroots/rootston/bindings.c

#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <wlr/util/log.h>
#include "rootston/bindings.h"

static bool outputs_enabled = true;

static const char *exec_prefix = "exec ";

static void double_fork_shell_cmd(const char *shell_cmd) {
    pid_t pid = fork();
    if (pid < 0) {
        wlr_log(WLR_ERROR, "cannot execute binding command: fork() failed");
        return;
    }

    if (pid == 0) {
        pid = fork();
        if (pid == 0) {
            execl("/bin/sh", "/bin/sh", "-c", shell_cmd, NULL);
            _exit(EXIT_FAILURE);
        } else {
            _exit(pid == -1);
        }
    }

    int status;
    while (waitpid(pid, &status, 0) < 0) {
        if (errno == EINTR) {
            continue;
        }
        wlr_log_errno(WLR_ERROR, "waitpid() on first child failed");
        return;
    }

    if (WIFEXITED(status) && WEXITSTATUS(status) == 0) {
        return;
    }

    wlr_log(WLR_ERROR, "first child failed to fork command");
}

void execute_binding_command(struct roots_seat *seat, 
        struct roots_input *input, const char *command) {
    if (strcmp(command, "exit") == 0) {
        wl_display_terminate(input->server->wl_display);
    } else if (strcmp(command, "close") == 0) {
        struct roots_view *focus = roots_seat_get_focus(seat);
        if (focus != NULL) {
            view_close(focus);
        }
    } else if (strcmp(command, "fullscreen") == 0) {
        struct roots_view *focus = roots_seat_get_focus(seat);
        if (focus != NULL) {
            bool is_fullscreen = focus->fullscreen_output != NULL;
            view_set_fullscreen(focus, !is_fullscreen, NULL);
        }
    } else if (strcmp(command, "next_window") == 0) {
        roots_seat_cycle_focus(seat);
    } else if (strcmp(command, "alpha") == 0) {
        struct roots_view *focus = roots_seat_get_focus(seat);
        if (focus != NULL) {
            view_cycle_alpha(focus);
        }
    } else if (strncmp(exec_prefix, command, strlen(exec_prefix)) == 0) {
        const char *shell_cmd = command + strlen(exec_prefix);
        double_fork_shell_cmd(shell_cmd);
    } else if (strcmp(command, "maximize") == 0) {
        struct roots_view *focus = roots_seat_get_focus(seat);
        if (focus != NULL) {
            view_maximize(focus, !focus->maximized);
        }
    } else if (strcmp(command, "nop") == 0) {
        wlr_log(WLR_DEBUG, "nop command");
    } else if (strcmp(command, "toggle_outputs") == 0) {
        outputs_enabled = !outputs_enabled;
        struct roots_output *output;
        wl_list_for_each(output, &input->server->desktop->outputs, link) {
            wlr_output_enable(output->wlr_output, outputs_enabled);
        }
    } else if (strcmp(command, "toggle_decoration_mode") == 0) {
        struct roots_view *focus = roots_seat_get_focus(seat);
        if (focus != NULL && focus->type == ROOTS_XDG_SHELL_VIEW) {
            struct roots_xdg_toplevel_decoration *decoration =
                focus->roots_xdg_surface->xdg_toplevel_decoration;
            if (decoration != NULL) {
                enum wlr_xdg_toplevel_decoration_v1_mode mode =
                    decoration->wlr_decoration->current_mode;
                mode = mode == WLR_XDG_TOPLEVEL_DECORATION_V1_MODE_SERVER_SIDE
                    ? WLR_XDG_TOPLEVEL_DECORATION_V1_MODE_CLIENT_SIDE
                    : WLR_XDG_TOPLEVEL_DECORATION_V1_MODE_SERVER_SIDE;
                wlr_xdg_toplevel_decoration_v1_set_mode(
                    decoration->wlr_decoration, mode);
            }
        }
    } else if (strcmp(command, "break_pointer_constraint") == 0) {
        struct wl_list *list = &input->seats;
        struct roots_seat *seat;
        wl_list_for_each(seat, list, link) {
            roots_cursor_constrain(seat->cursor, NULL, NAN, NAN);
        }
    } else {
        wlr_log(WLR_ERROR, "unknown binding command: %s", command);
    }
}