82 lines
2.4 KiB
C
82 lines
2.4 KiB
C
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/* This program was created using this as a reference: https://jan.newmarch.name/Wayland/ProgrammingClient/
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*
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* wayland-run-on-new-display runs a command each time a new display is attached.
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*
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* Copyright (C) 2021 Robby Zambito
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <wayland-client.h>
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#define STREQ(a, b) (strcmp(a, b) == 0)
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static char **command_argv;
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static void global_registry_handler(void *data, struct wl_registry *registry,
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uint32_t id, const char *interface,
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uint32_t version) {
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/* A new display has been attached */
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if (STREQ(interface, "wl_output")) {
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errno = 0;
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switch (fork()) {
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case -1: /* Handle error */
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perror("Unable to fork");
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break;
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case 0: /* In child */
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execvp(command_argv[0], command_argv);
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/* No need to break, the exec leaves the current program. */
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default:;
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}
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}
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}
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static void global_registry_remover(void *data, struct wl_registry *registry,
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uint32_t id) {
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/* Do nothing. */
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}
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int main(int argc, char **argv) {
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command_argv = argv + 1;
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struct wl_display *display = wl_display_connect(NULL);
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if (display == NULL) {
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fputs("Failed to connect to the Wayland socket", stderr);
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exit(EXIT_FAILURE);
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}
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const struct wl_registry_listener registry_listener = {
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global_registry_handler,
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global_registry_remover,
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};
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struct wl_registry *registry = wl_display_get_registry(display);
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wl_registry_add_listener(registry, ®istry_listener, NULL);
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for (;;) {
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wl_display_dispatch(display);
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wl_display_roundtrip(display);
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}
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wl_display_disconnect(display);
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return EXIT_SUCCESS;
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}
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