sway/swaylock/main.c

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C
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#define _XOPEN_SOURCE 700
#define _POSIX_C_SOURCE 200112L
#include <assert.h>
#include <ctype.h>
#include <fcntl.h>
#include <getopt.h>
#include <stdbool.h>
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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/mman.h>
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#include <sys/stat.h>
#include <time.h>
#include <unistd.h>
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#include <wayland-client.h>
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#include <wordexp.h>
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#include <wlr/util/log.h>
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#include "swaylock/seat.h"
#include "swaylock/swaylock.h"
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#include "background-image.h"
#include "pool-buffer.h"
#include "cairo.h"
#include "log.h"
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#include "stringop.h"
#include "util.h"
#include "wlr-input-inhibitor-unstable-v1-client-protocol.h"
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#include "wlr-layer-shell-unstable-v1-client-protocol.h"
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#include "xdg-output-unstable-v1-client-protocol.h"
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void sway_terminate(int exit_code) {
exit(exit_code);
}
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static void daemonize() {
int fds[2];
if (pipe(fds) != 0) {
wlr_log(L_ERROR, "Failed to pipe");
exit(1);
}
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if (fork() == 0) {
close(fds[0]);
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int devnull = open("/dev/null", O_RDWR);
dup2(STDOUT_FILENO, devnull);
dup2(STDERR_FILENO, devnull);
close(devnull);
uint8_t success = 0;
if (chdir("/") != 0) {
write(fds[1], &success, 1);
exit(1);
}
success = 1;
if (write(fds[1], &success, 1) != 1) {
exit(1);
}
close(fds[1]);
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} else {
close(fds[1]);
uint8_t success;
if (read(fds[0], &success, 1) != 1 || !success) {
wlr_log(L_ERROR, "Failed to daemonize");
exit(1);
}
close(fds[0]);
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exit(0);
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}
}
static void destroy_surface(struct swaylock_surface *surface) {
wl_list_remove(&surface->link);
if (surface->layer_surface != NULL) {
zwlr_layer_surface_v1_destroy(surface->layer_surface);
}
if (surface->surface != NULL) {
wl_surface_destroy(surface->surface);
}
destroy_buffer(&surface->buffers[0]);
destroy_buffer(&surface->buffers[1]);
wl_output_destroy(surface->output);
free(surface);
}
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static const struct zwlr_layer_surface_v1_listener layer_surface_listener;
static cairo_surface_t *select_image(struct swaylock_state *state,
struct swaylock_surface *surface);
static bool surface_is_opaque(struct swaylock_surface *surface) {
if (surface->image) {
return cairo_surface_get_content(surface->image) == CAIRO_CONTENT_COLOR;
}
return (surface->state->args.color & 0xff) == 0xff;
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}
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static void create_layer_surface(struct swaylock_surface *surface) {
struct swaylock_state *state = surface->state;
surface->image = select_image(state, surface);
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surface->surface = wl_compositor_create_surface(state->compositor);
assert(surface->surface);
surface->layer_surface = zwlr_layer_shell_v1_get_layer_surface(
state->layer_shell, surface->surface, surface->output,
ZWLR_LAYER_SHELL_V1_LAYER_OVERLAY, "lockscreen");
assert(surface->layer_surface);
zwlr_layer_surface_v1_set_size(surface->layer_surface, 0, 0);
zwlr_layer_surface_v1_set_anchor(surface->layer_surface,
ZWLR_LAYER_SURFACE_V1_ANCHOR_TOP |
ZWLR_LAYER_SURFACE_V1_ANCHOR_RIGHT |
ZWLR_LAYER_SURFACE_V1_ANCHOR_BOTTOM |
ZWLR_LAYER_SURFACE_V1_ANCHOR_LEFT);
zwlr_layer_surface_v1_set_exclusive_zone(surface->layer_surface, -1);
zwlr_layer_surface_v1_set_keyboard_interactivity(
surface->layer_surface, true);
zwlr_layer_surface_v1_add_listener(surface->layer_surface,
&layer_surface_listener, surface);
if (surface_is_opaque(surface) &&
surface->state->args.mode != BACKGROUND_MODE_CENTER &&
surface->state->args.mode != BACKGROUND_MODE_FIT) {
struct wl_region *region =
wl_compositor_create_region(surface->state->compositor);
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wl_region_add(region, 0, 0, INT32_MAX, INT32_MAX);
wl_surface_set_opaque_region(surface->surface, region);
wl_region_destroy(region);
}
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wl_surface_commit(surface->surface);
}
static void layer_surface_configure(void *data,
struct zwlr_layer_surface_v1 *layer_surface,
uint32_t serial, uint32_t width, uint32_t height) {
struct swaylock_surface *surface = data;
surface->width = width;
surface->height = height;
zwlr_layer_surface_v1_ack_configure(layer_surface, serial);
render_frame(surface);
}
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static void layer_surface_closed(void *data,
struct zwlr_layer_surface_v1 *layer_surface) {
struct swaylock_surface *surface = data;
destroy_surface(surface);
}
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static const struct zwlr_layer_surface_v1_listener layer_surface_listener = {
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.configure = layer_surface_configure,
.closed = layer_surface_closed,
};
static const struct wl_callback_listener surface_frame_listener;
static void surface_frame_handle_done(void *data, struct wl_callback *callback,
uint32_t time) {
struct swaylock_surface *surface = data;
wl_callback_destroy(callback);
surface->frame_pending = false;
if (surface->dirty) {
// Schedule a frame in case the surface is damaged again
struct wl_callback *callback = wl_surface_frame(surface->surface);
wl_callback_add_listener(callback, &surface_frame_listener, surface);
surface->frame_pending = true;
render_frame(surface);
surface->dirty = false;
}
}
static const struct wl_callback_listener surface_frame_listener = {
.done = surface_frame_handle_done,
};
void damage_surface(struct swaylock_surface *surface) {
surface->dirty = true;
if (surface->frame_pending) {
return;
}
struct wl_callback *callback = wl_surface_frame(surface->surface);
wl_callback_add_listener(callback, &surface_frame_listener, surface);
surface->frame_pending = true;
wl_surface_commit(surface->surface);
}
void damage_state(struct swaylock_state *state) {
struct swaylock_surface *surface;
wl_list_for_each(surface, &state->surfaces, link) {
damage_surface(surface);
}
}
static void handle_wl_output_geometry(void *data, struct wl_output *output,
int32_t x, int32_t y, int32_t width_mm, int32_t height_mm,
int32_t subpixel, const char *make, const char *model,
int32_t transform) {
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// Who cares
}
static void handle_wl_output_mode(void *data, struct wl_output *output,
uint32_t flags, int32_t width, int32_t height, int32_t refresh) {
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// Who cares
}
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static void handle_wl_output_done(void *data, struct wl_output *output) {
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// Who cares
}
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static void handle_wl_output_scale(void *data, struct wl_output *output,
int32_t factor) {
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struct swaylock_surface *surface = data;
surface->scale = factor;
if (surface->state->run_display) {
damage_surface(surface);
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}
}
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struct wl_output_listener _wl_output_listener = {
.geometry = handle_wl_output_geometry,
.mode = handle_wl_output_mode,
.done = handle_wl_output_done,
.scale = handle_wl_output_scale,
};
static void handle_xdg_output_logical_size(void *data, struct zxdg_output_v1 *output,
int width, int height) {
// Who cares
}
static void handle_xdg_output_logical_position(void *data,
struct zxdg_output_v1 *output, int x, int y) {
// Who cares
}
static void handle_xdg_output_name(void *data, struct zxdg_output_v1 *output,
const char *name) {
wlr_log(L_DEBUG, "output name is %s", name);
struct swaylock_surface *surface = data;
surface->xdg_output = output;
surface->output_name = strdup(name);
}
static void handle_xdg_output_description(void *data, struct zxdg_output_v1 *output,
const char *description) {
// Who cares
}
static void handle_xdg_output_done(void *data, struct zxdg_output_v1 *output) {
// Who cares
}
struct zxdg_output_v1_listener _xdg_output_listener = {
.logical_position = handle_xdg_output_logical_position,
.logical_size = handle_xdg_output_logical_size,
.done = handle_xdg_output_done,
.name = handle_xdg_output_name,
.description = handle_xdg_output_description,
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};
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static void handle_global(void *data, struct wl_registry *registry,
uint32_t name, const char *interface, uint32_t version) {
struct swaylock_state *state = data;
if (strcmp(interface, wl_compositor_interface.name) == 0) {
state->compositor = wl_registry_bind(registry, name,
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&wl_compositor_interface, 3);
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} else if (strcmp(interface, wl_shm_interface.name) == 0) {
state->shm = wl_registry_bind(registry, name,
&wl_shm_interface, 1);
} else if (strcmp(interface, wl_seat_interface.name) == 0) {
struct wl_seat *seat = wl_registry_bind(
registry, name, &wl_seat_interface, 1);
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wl_seat_add_listener(seat, &seat_listener, state);
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} else if (strcmp(interface, zwlr_layer_shell_v1_interface.name) == 0) {
state->layer_shell = wl_registry_bind(
registry, name, &zwlr_layer_shell_v1_interface, 1);
} else if (strcmp(interface, zwlr_input_inhibit_manager_v1_interface.name) == 0) {
state->input_inhibit_manager = wl_registry_bind(
registry, name, &zwlr_input_inhibit_manager_v1_interface, 1);
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} else if (strcmp(interface, zxdg_output_manager_v1_interface.name) == 0) {
state->zxdg_output_manager = wl_registry_bind(
registry, name, &zxdg_output_manager_v1_interface, 2);
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} else if (strcmp(interface, wl_output_interface.name) == 0) {
struct swaylock_surface *surface =
calloc(1, sizeof(struct swaylock_surface));
surface->state = state;
surface->output = wl_registry_bind(registry, name,
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&wl_output_interface, 3);
surface->output_global_name = name;
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wl_output_add_listener(surface->output, &_wl_output_listener, surface);
wl_list_insert(&state->surfaces, &surface->link);
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if (state->run_display) {
create_layer_surface(surface);
wl_display_roundtrip(state->display);
}
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}
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}
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static void handle_global_remove(void *data, struct wl_registry *registry,
uint32_t name) {
struct swaylock_state *state = data;
struct swaylock_surface *surface;
wl_list_for_each(surface, &state->surfaces, link) {
if (surface->output_global_name == name) {
destroy_surface(surface);
break;
}
}
}
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static const struct wl_registry_listener registry_listener = {
.global = handle_global,
.global_remove = handle_global_remove,
};
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static cairo_surface_t *select_image(struct swaylock_state *state,
struct swaylock_surface *surface) {
struct swaylock_image *image;
cairo_surface_t *default_image = NULL;
wl_list_for_each(image, &state->images, link) {
if (lenient_strcmp(image->output_name, surface->output_name) == 0) {
return image->cairo_surface;
} else if (!image->output_name) {
default_image = image->cairo_surface;
}
}
return default_image;
}
static void load_image(char *arg, struct swaylock_state *state) {
// [<output>:]<path>
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struct swaylock_image *image = calloc(1, sizeof(struct swaylock_image));
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char *separator = strchr(arg, ':');
if (separator) {
*separator = '\0';
image->output_name = strdup(arg);
image->path = strdup(separator + 1);
} else {
image->output_name = NULL;
image->path = strdup(arg);
}
bool exists = false;
struct swaylock_image *iter_image;
wl_list_for_each(iter_image, &state->images, link) {
if (lenient_strcmp(iter_image->output_name, image->output_name) == 0) {
exists = true;
break;
}
}
if (exists) {
if (image->output_name) {
wlr_log(L_ERROR, "Multiple images defined for output %s",
image->output_name);
} else {
wlr_log(L_ERROR, "Multiple default images defined");
}
}
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// Bash doesn't replace the ~ with $HOME if the output name is supplied
wordexp_t p;
if (wordexp(image->path, &p, 0) == 0) {
free(image->path);
image->path = strdup(p.we_wordv[0]);
wordfree(&p);
}
// Load the actual image
image->cairo_surface = load_background_image(image->path);
if (!image->cairo_surface) {
free(image);
return;
}
wl_list_insert(&state->images, &image->link);
state->args.mode = BACKGROUND_MODE_FILL;
wlr_log(L_DEBUG, "Loaded image %s for output %s",
image->path, image->output_name ? image->output_name : "*");
}
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static struct swaylock_state state;
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int main(int argc, char **argv) {
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static struct option long_options[] = {
{"help", no_argument, NULL, 'h'},
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{"color", required_argument, NULL, 'c'},
{"image", required_argument, NULL, 'i'},
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{"scaling", required_argument, NULL, 's'},
{"tiling", no_argument, NULL, 't'},
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{"version", no_argument, NULL, 'v'},
{"socket", required_argument, NULL, 'p'},
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{"no-unlock-indicator", no_argument, NULL, 'u'},
{"daemonize", no_argument, NULL, 'f'},
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{0, 0, 0, 0}
};
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const char usage[] =
"Usage: swaylock [options...]\n"
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"\n"
" -h, --help Show help message and quit.\n"
" -c, --color <rrggbb[aa]> Turn the screen into the given color instead of white.\n"
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" -s, --scaling Scaling mode: stretch, fill, fit, center, tile.\n"
" -t, --tiling Same as --scaling=tile.\n"
" -v, --version Show the version number and quit.\n"
" -i, --image [<output>:]<path> Display the given image.\n"
" -u, --no-unlock-indicator Disable the unlock indicator.\n"
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" -f, --daemonize Detach from the controlling terminal.\n";
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state.args = (struct swaylock_args){
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.mode = BACKGROUND_MODE_SOLID_COLOR,
.color = 0xFFFFFFFF,
.show_indicator = true,
};
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wl_list_init(&state.images);
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wlr_log_init(L_DEBUG, NULL);
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int c;
while (1) {
int option_index = 0;
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c = getopt_long(argc, argv, "hc:i:s:tvuf", long_options, &option_index);
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if (c == -1) {
break;
}
switch (c) {
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case 'c': {
state.args.color = parse_color(optarg);
state.args.mode = BACKGROUND_MODE_SOLID_COLOR;
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break;
}
case 'i':
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load_image(optarg, &state);
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break;
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case 's':
state.args.mode = parse_background_mode(optarg);
if (state.args.mode == BACKGROUND_MODE_INVALID) {
return 1;
}
break;
case 't':
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state.args.mode = BACKGROUND_MODE_TILE;
break;
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case 'v':
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#if defined SWAY_GIT_VERSION && defined SWAY_GIT_BRANCH && defined SWAY_VERSION_DATE
fprintf(stdout, "swaylock version %s (%s, branch \"%s\")\n",
SWAY_GIT_VERSION, SWAY_VERSION_DATE, SWAY_GIT_BRANCH);
#else
fprintf(stdout, "version unknown\n");
#endif
return 0;
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case 'u':
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state.args.show_indicator = false;
break;
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case 'f':
daemonize();
break;
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default:
fprintf(stderr, "%s", usage);
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return 1;
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}
}
#ifdef __linux__
// Most non-linux platforms require root to mlock()
if (mlock(state.password.buffer, sizeof(state.password.buffer)) != 0) {
sway_abort("Unable to mlock() password memory.");
}
#endif
wl_list_init(&state.surfaces);
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state.xkb.context = xkb_context_new(XKB_CONTEXT_NO_FLAGS);
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state.display = wl_display_connect(NULL);
assert(state.display);
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struct wl_registry *registry = wl_display_get_registry(state.display);
wl_registry_add_listener(registry, &registry_listener, &state);
wl_display_roundtrip(state.display);
assert(state.compositor && state.layer_shell && state.shm);
if (!state.input_inhibit_manager) {
wlr_log(L_ERROR, "Compositor does not support the input inhibitor "
"protocol, refusing to run insecurely");
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return 1;
}
if (wl_list_empty(&state.surfaces)) {
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wlr_log(L_DEBUG, "Exiting - no outputs to show on.");
return 0;
}
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zwlr_input_inhibit_manager_v1_get_inhibitor(state.input_inhibit_manager);
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if (state.zxdg_output_manager) {
struct swaylock_surface *surface;
wl_list_for_each(surface, &state.surfaces, link) {
surface->xdg_output = zxdg_output_manager_v1_get_xdg_output(
state.zxdg_output_manager, surface->output);
zxdg_output_v1_add_listener(
surface->xdg_output, &_xdg_output_listener, surface);
}
wl_display_roundtrip(state.display);
} else {
wlr_log(L_INFO, "Compositor does not support zxdg output manager, "
"images assigned to named outputs will not work");
}
struct swaylock_surface *surface;
wl_list_for_each(surface, &state.surfaces, link) {
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create_layer_surface(surface);
}
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state.run_display = true;
while (wl_display_dispatch(state.display) != -1 && state.run_display) {
// This space intentionally left blank
}
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return 0;
}