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feat: fd-based readiness notification

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Fyodor Doletov 2026-03-20 23:11:33 +03:00
parent ccefa572e1
commit 1c88b99015
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GPG key ID: C0A50634E2CD95C6
1 changed files with 20 additions and 4 deletions
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24
src/mango.c
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@ -666,7 +666,7 @@ static void requestdecorationmode(struct wl_listener *listener, void *data);
static void requestdrmlease(struct wl_listener *listener, void *data);
static void requeststartdrag(struct wl_listener *listener, void *data);
static void resize(Client *c, struct wlr_box geo, int32_t interact);
static void run(char *startup_cmd);
static void run(char *startup_cmd, int readiness_fd);
static void setcursor(struct wl_listener *listener, void *data);
static void setfloating(Client *c, int32_t floating);
static void setfakefullscreen(Client *c, int32_t fakefullscreen);
@ -4918,7 +4918,7 @@ cleanup:
}
void // 17
run(char *startup_cmd) {
run(char *startup_cmd, int readiness_fd) {
set_env();
@ -4979,6 +4979,15 @@ run(char *startup_cmd) {
run_exec();
run_exec_once();
/*
* If running inside supervision suite like s6, notify about successfull startup
* by writing \n to the provided file descriptor and closing it
*/
if (readiness_fd > 2){
write(readiness_fd, "\n", 1);
close(readiness_fd);
}
/* Run the Wayland event loop. This does not return until you exit the
* compositor. Starting the backend rigged up all of the necessary event
* loop configuration to listen to libinput events, DRM events, generate
@ -6631,8 +6640,9 @@ static void setgeometrynotify(struct wl_listener *listener, void *data) {
int32_t main(int32_t argc, char *argv[]) {
char *startup_cmd = NULL;
int32_t c;
int readiness_fd = 0;
while ((c = getopt(argc, argv, "s:c:hdvp")) != -1) {
while ((c = getopt(argc, argv, "s:c:r:hdvp")) != -1) {
if (c == 's') {
startup_cmd = optarg;
} else if (c == 'd') {
@ -6644,6 +6654,11 @@ int32_t main(int32_t argc, char *argv[]) {
cli_config_path = optarg;
} else if (c == 'p') {
return parse_config() ? EXIT_SUCCESS : EXIT_FAILURE;
} else if (c == 'r') {
readiness_fd = atoi(optarg);
if (readiness_fd < 3) {
goto usage;
}
} else {
goto usage;
}
@ -6657,7 +6672,7 @@ int32_t main(int32_t argc, char *argv[]) {
if (!getenv("XDG_RUNTIME_DIR"))
die("XDG_RUNTIME_DIR must be set");
setup();
run(startup_cmd);
run(startup_cmd, readiness_fd);
cleanup();
return EXIT_SUCCESS;
usage:
@ -6668,6 +6683,7 @@ usage:
" -d Enable debug log\n"
" -c <file> Use custom configuration file\n"
" -s <command> Execute startup command\n"
" -r <fdnum> When WM is ready, write '\\n' to the given file descriptor and close it. fdnum >= 3\n"
" -p Check configuration file error\n");
return EXIT_SUCCESS;
}