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swaylock/main.c

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12 KiB
C
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#include "wayland-swaylock-client-protocol.h"
#include <xkbcommon/xkbcommon.h>
#include <xkbcommon/xkbcommon-names.h>
#include <security/pam_appl.h>
#include <json-c/json.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <pwd.h>
#include <getopt.h>
#include "client/window.h"
#include "client/registry.h"
#include "client/cairo.h"
#include "ipc-client.h"
#include "log.h"
list_t *surfaces;
struct registry *registry;
enum scaling_mode {
SCALING_MODE_STRETCH,
SCALING_MODE_FILL,
SCALING_MODE_FIT,
SCALING_MODE_CENTER,
SCALING_MODE_TILE,
};
void sway_terminate(int exit_code) {
int i;
for (i = 0; i < surfaces->length; ++i) {
struct window *window = surfaces->items[i];
window_teardown(window);
}
list_free(surfaces);
if (registry) {
registry_teardown(registry);
}
exit(exit_code);
}
char *password;
int password_size;
int function_conversation(int num_msg, const struct pam_message **msg,
struct pam_response **resp, void *appdata_ptr) {
const char* msg_style_names[] = {
NULL,
"PAM_PROMPT_ECHO_OFF",
"PAM_PROMPT_ECHO_ON",
"PAM_ERROR_MSG",
"PAM_TEXT_INFO",
};
/* PAM expects an array of responses, one for each message */
struct pam_response *pam_reply = calloc(num_msg, sizeof(struct pam_response));
*resp = pam_reply;
for(int i=0; i<num_msg; ++i) {
sway_log(L_DEBUG, "msg[%d]: (%s) %s", i,
msg_style_names[msg[i]->msg_style],
msg[i]->msg);
switch (msg[i]->msg_style) {
case PAM_PROMPT_ECHO_OFF:
case PAM_PROMPT_ECHO_ON:
pam_reply[i].resp = password;
break;
case PAM_ERROR_MSG:
case PAM_TEXT_INFO:
break;
}
}
return PAM_SUCCESS;
}
/**
* password will be zeroed out.
*/
bool verify_password() {
struct passwd *passwd = getpwuid(getuid());
char *username = passwd->pw_name;
const struct pam_conv local_conversation = { function_conversation, NULL };
pam_handle_t *local_auth_handle = NULL;
int pam_err;
if ((pam_err = pam_start("swaylock", username, &local_conversation, &local_auth_handle)) != PAM_SUCCESS) {
sway_abort("PAM returned %d\n", pam_err);
}
if ((pam_err = pam_authenticate(local_auth_handle, 0)) != PAM_SUCCESS) {
return false;
}
if ((pam_err = pam_end(local_auth_handle, pam_err)) != PAM_SUCCESS) {
return false;
}
return true;
}
void notify_key(enum wl_keyboard_key_state state, xkb_keysym_t sym, uint32_t code, uint32_t codepoint) {
if (state == WL_KEYBOARD_KEY_STATE_PRESSED) {
switch (sym) {
case XKB_KEY_Return:
if (verify_password()) {
exit(0);
}
password_size = 1024;
password = malloc(password_size);
password[0] = '\0';
break;
case XKB_KEY_BackSpace:
{
int i = strlen(password);
if (i > 0) {
password[i - 1] = '\0';
}
break;
}
default:
{
int i = strlen(password);
if (i + 1 == password_size) {
password_size += 1024;
password = realloc(password, password_size);
}
password[i] = (char)codepoint;
password[i + 1] = '\0';
break;
}
}
}
}
void render_color(struct window *window, uint32_t color) {
cairo_set_source_u32(window->cairo, color);
cairo_paint(window->cairo);
}
void render_image(struct window *window, cairo_surface_t *image, enum scaling_mode scaling_mode) {
double width = cairo_image_surface_get_width(image);
double height = cairo_image_surface_get_height(image);
switch (scaling_mode) {
case SCALING_MODE_STRETCH:
cairo_scale(window->cairo,
(double) window->width / width,
(double) window->height / height);
cairo_set_source_surface(window->cairo, image, 0, 0);
break;
case SCALING_MODE_FILL:
{
double window_ratio = (double) window->width / window->height;
double bg_ratio = width / height;
if (window_ratio > bg_ratio) {
double scale = (double) window->width / width;
cairo_scale(window->cairo, scale, scale);
cairo_set_source_surface(window->cairo, image,
0,
(double) window->height/2 / scale - height/2);
} else {
double scale = (double) window->height / height;
cairo_scale(window->cairo, scale, scale);
cairo_set_source_surface(window->cairo, image,
(double) window->width/2 / scale - width/2,
0);
}
break;
}
case SCALING_MODE_FIT:
{
double window_ratio = (double) window->width / window->height;
double bg_ratio = width / height;
if (window_ratio > bg_ratio) {
double scale = (double) window->height / height;
cairo_scale(window->cairo, scale, scale);
cairo_set_source_surface(window->cairo, image,
(double) window->width/2 / scale - width/2,
0);
} else {
double scale = (double) window->width / width;
cairo_scale(window->cairo, scale, scale);
cairo_set_source_surface(window->cairo, image,
0,
(double) window->height/2 / scale - height/2);
}
break;
}
case SCALING_MODE_CENTER:
cairo_set_source_surface(window->cairo, image,
(double) window->width/2 - width/2,
(double) window->height/2 - height/2);
break;
case SCALING_MODE_TILE:
{
cairo_pattern_t *pattern = cairo_pattern_create_for_surface(image);
cairo_pattern_set_extend(pattern, CAIRO_EXTEND_REPEAT);
cairo_set_source(window->cairo, pattern);
break;
}
}
cairo_paint(window->cairo);
}
cairo_surface_t *load_image(char *image_path) {
cairo_surface_t *image = NULL;
#ifdef WITH_GDK_PIXBUF
GError *err = NULL;
GdkPixbuf *pixbuf = gdk_pixbuf_new_from_file(image_path, &err);
if (!pixbuf) {
fprintf(stderr, "GDK Error: %s\n", err->message);
sway_abort("Failed to load background image.");
}
image = gdk_cairo_image_surface_create_from_pixbuf(pixbuf);
g_object_unref(pixbuf);
#else
image = cairo_image_surface_create_from_png(image_path);
#endif //WITH_GDK_PIXBUF
if (!image) {
sway_abort("Failed to read background image.");
}
return image;
}
int main(int argc, char **argv) {
char *scaling_mode_str = "fit", *socket_path = NULL;
int i, num_images = 0, color_set = 0;
uint32_t color = 0xFFFFFFFF;
void *images;
init_log(L_INFO);
static struct option long_options[] = {
{"help", no_argument, NULL, 'h'},
{"color", required_argument, NULL, 'c'},
{"image", required_argument, NULL, 'i'},
{"scaling", required_argument, NULL, 's'},
{"tiling", no_argument, NULL, 't'},
{"version", no_argument, NULL, 'v'},
{"socket", required_argument, NULL, 'p'},
{0, 0, 0, 0}
};
const char *usage =
"Usage: swaylock [options...]\n"
"\n"
" -h, --help Show help message and quit.\n"
" -c, --color <rrggbb[aa]> Turn the screen into the given color instead of white.\n"
" -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"
" --socket <socket> Use the specified socket.\n";
registry = registry_poll();
int c;
while (1) {
int option_index = 0;
c = getopt_long(argc, argv, "hc:i:s:tv", long_options, &option_index);
if (c == -1) {
break;
}
switch (c) {
case 'c':
{
int colorlen = strlen(optarg);
if (colorlen < 6 || colorlen == 7 || colorlen > 8) {
fprintf(stderr, "color must be specified in 3 or 4 byte format, e.g. ff0000 or ff0000ff\n");
exit(EXIT_FAILURE);
}
color = strtol(optarg, NULL, 16);
color_set = 1;
if (colorlen == 6) {
color <<= 8;
color |= 0xFF;
}
sway_log(L_DEBUG, "color: 0x%x", color);
break;
}
case 'i':
{
char *image_path = strchr(optarg, ':');
if (image_path == NULL) {
if (num_images == 0) {
images = load_image(optarg);
num_images = -1;
} else {
fprintf(stderr, "display must be defined for all --images or no --images.\n");
exit(EXIT_FAILURE);
}
} else {
if (num_images == 0) {
images = calloc(registry->outputs->length, sizeof(char*) * 2);
} else if (num_images == -1) {
fprintf(stderr, "display must be defined for all --images or no --images.\n");
exit(EXIT_FAILURE);
}
image_path[0] = '\0';
((char**) images)[num_images * 2] = optarg;
((char**) images)[num_images++ * 2 + 1] = ++image_path;
}
break;
}
case 's':
scaling_mode_str = optarg;
break;
case 't':
scaling_mode_str = "tile";
break;
case 'p':
socket_path = optarg;
break;
case 'v':
#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 not detected\n");
#endif
exit(EXIT_SUCCESS);
break;
default:
fprintf(stderr, "%s", usage);
exit(EXIT_FAILURE);
}
}
enum scaling_mode scaling_mode = SCALING_MODE_STRETCH;
if (strcmp(scaling_mode_str, "stretch") == 0) {
scaling_mode = SCALING_MODE_STRETCH;
} else if (strcmp(scaling_mode_str, "fill") == 0) {
scaling_mode = SCALING_MODE_FILL;
} else if (strcmp(scaling_mode_str, "fit") == 0) {
scaling_mode = SCALING_MODE_FIT;
} else if (strcmp(scaling_mode_str, "center") == 0) {
scaling_mode = SCALING_MODE_CENTER;
} else if (strcmp(scaling_mode_str, "tile") == 0) {
scaling_mode = SCALING_MODE_TILE;
} else {
sway_abort("Unsupported scaling mode: %s", scaling_mode_str);
}
password_size = 1024;
password = malloc(password_size);
password[0] = '\0';
surfaces = create_list();
if (!socket_path) {
socket_path = get_socketpath();
if (!socket_path) {
sway_abort("Unable to retrieve socket path");
}
}
if (!registry) {
sway_abort("Unable to connect to wayland compositor");
}
if (!registry->swaylock) {
sway_abort("swaylock requires the compositor to support the swaylock extension.");
}
if (registry->pointer) {
// We don't want swaylock to have a pointer
wl_pointer_destroy(registry->pointer);
registry->pointer = NULL;
}
for (i = 0; i < registry->outputs->length; ++i) {
struct output_state *output = registry->outputs->items[i];
struct window *window = window_setup(registry, output->width, output->height, true);
if (!window) {
sway_abort("Failed to create surfaces.");
}
list_add(surfaces, window);
}
registry->input->notify = notify_key;
if (num_images >= 1) {
char **displays_paths = images;
images = calloc(registry->outputs->length, sizeof(cairo_surface_t*));
int socketfd = ipc_open_socket(socket_path);
uint32_t len = 0;
char *outputs = ipc_single_command(socketfd, IPC_GET_OUTPUTS, "", &len);
struct json_object *json_outputs = json_tokener_parse(outputs);
for (i = 0; i < registry->outputs->length; ++i) {
if (displays_paths[i * 2] != NULL) {
for (int j = 0;; ++j) {
if (j >= json_object_array_length(json_outputs)) {
fprintf(stderr, "%s is not an extant display\n", displays_paths[i * 2]);
exit(EXIT_FAILURE);
}
struct json_object *dsp_name, *at_j = json_object_array_get_idx(json_outputs, j);
if (!json_object_object_get_ex(at_j, "name", &dsp_name)) {
sway_abort("display doesn't have a name field");
}
if (!strcmp(displays_paths[i * 2], json_object_get_string(dsp_name))) {
((cairo_surface_t**) images)[j] = load_image(displays_paths[i * 2 + 1]);
break;
}
}
}
}
json_object_put(json_outputs);
close(socketfd);
free(displays_paths);
}
for (i = 0; i < surfaces->length; ++i) {
struct window *window = surfaces->items[i];
if (!window_prerender(window) || !window->cairo) {
continue;
}
if (num_images == 0 || color_set) {
render_color(window, color);
}
if (num_images == -1) {
render_image(window, images, scaling_mode);
} else if (num_images >= 1) {
if (((cairo_surface_t**) images)[i] != NULL) {
render_image(window, ((cairo_surface_t**) images)[i], scaling_mode);
}
}
window_render(window);
}
if (num_images == -1) {
cairo_surface_destroy((cairo_surface_t*) images);
} else if (num_images >= 1) {
for (i = 0; i < registry->outputs->length; ++i) {
if (((cairo_surface_t**) images)[i] != NULL) {
cairo_surface_destroy(((cairo_surface_t**) images)[i]);
}
}
free(images);
}
bool locked = false;
while (wl_display_dispatch(registry->display) != -1) {
if (!locked) {
for (i = 0; i < registry->outputs->length; ++i) {
struct output_state *output = registry->outputs->items[i];
struct window *window = surfaces->items[i];
lock_set_lock_surface(registry->swaylock, output->output, window->surface);
}
locked = true;
}
}
for (i = 0; i < surfaces->length; ++i) {
struct window *window = surfaces->items[i];
window_teardown(window);
}
list_free(surfaces);
registry_teardown(registry);
return 0;
}
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