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parser.c
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Tsuki
init
 r0 /* Here be a small dragon.
* Not as large as the monster
* in src/swindle.c
* but you get the idea */
#include "parser.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <time.h>
#include <unistd.h>
#include <signal.h>
#include <sys/wait.h>
#include <sys/inotify.h>
#include <linux/input-event-codes.h>
#include <xkbcommon/xkbcommon.h>
#include <wayland-server-core.h>
/* Lua */
#include <lua.h>
#include <lauxlib.h>
#include <lualib.h>
/* wlroots */
#include <wlr/util/log.h>
#include <wlr/types/wlr_keyboard.h>
#include <libinput.h>
/* Forward declarations from src/swindle.c */
extern struct wl_list mons;
extern struct wl_list clients;
void arrange(void *m);
/* Internal watcher state */
typedef struct {
int inotify_fd;
int watch_fd;
char path[1024];
config_reload_cb cb;
void *userdata;
struct wl_event_source *event_src;
} WatchState;
/* Helpers */
static void
lua_log_error(lua_State *L, const char *context)
{
fprintf(stderr, "swindle config [%s]: %s\n",
context, lua_tostring(L, -1));
lua_pop(L, 1);
}
/* Get a string field from the table at the top of the stack
* Writes into buf and returns false and leaves buf untouched on failure
*/
static bool
lua_get_string(lua_State *L, const char *key, char *buf, size_t bufsz)
{
lua_getfield(L, -1, key);
bool ok = lua_isstring(L, -1);
if (ok)
strncpy(buf, lua_tostring(L, -1), bufsz - 1);
lua_pop(L, 1);
return ok;
}
/* Get an integer field. It falls back to `def` if missing or wrong type */
static int
lua_get_int(lua_State *L, const char *key, int def)
{
lua_getfield(L, -1, key);
int val = lua_isnumber(L, -1) ? (int)lua_tointeger(L, -1) : def;
lua_pop(L, 1);
return val;
}
static double
lua_get_double(lua_State *L, const char *key, double def)
{
lua_getfield(L, -1, key);
double val = lua_isnumber(L, -1) ? lua_tonumber(L, -1) : def;
lua_pop(L, 1);
return val;
}
static bool
lua_get_bool(lua_State *L, const char *key, bool def)
{
lua_getfield(L, -1, key);
bool val = lua_isboolean(L, -1) ? lua_toboolean(L, -1) : def;
lua_pop(L, 1);
return val;
}
/* wlroots hard-asserts opacity is in [0,1] and takes the whole thing
* down with it if it isn't (as it should), so it might as well clamp anything
* a user's config throws at it because users are kinda unwise */
static float
lua_get_opacity(lua_State *L, const char *key, float def)
{
double v = lua_get_double(L, key, (double)def);
if (v < 0.0) {
fprintf(stderr, "swindle config: '%s' below 0, clamping to 0\n", key);
v = 0.0;
} else if (v > 1.0) {
fprintf(stderr, "swindle config: '%s' above 1, clamping to 1\n", key);
v = 1.0;
}
return (float)v;
}
static void
parse_color_hex(uint32_t hex, float out[4])
{
out[0] = ((hex >> 24) & 0xFF) / 255.0f;
out[1] = ((hex >> 16) & 0xFF) / 255.0f;
out[2] = ((hex >> 8) & 0xFF) / 255.0f;
out[3] = ( hex & 0xFF) / 255.0f;
}
static void
lua_get_color(lua_State *L, const char *key, float out[4],
float r, float g, float b, float a)
{
lua_getfield(L, -1, key);
if (lua_isnumber(L, -1))
parse_color_hex((uint32_t)lua_tointeger(L, -1), out);
else {
out[0] = r; out[1] = g; out[2] = b; out[3] = a;
}
lua_pop(L, 1);
}
static uint32_t
parse_modifier(const char *name)
{
if (!strcmp(name, "shift")) return WLR_MODIFIER_SHIFT;
if (!strcmp(name, "ctrl")) return WLR_MODIFIER_CTRL;
if (!strcmp(name, "alt")) return WLR_MODIFIER_ALT;
if (!strcmp(name, "logo")) return WLR_MODIFIER_LOGO;
if (!strcmp(name, "mod2")) return WLR_MODIFIER_MOD2;
if (!strcmp(name, "mod3")) return WLR_MODIFIER_MOD3;
if (!strcmp(name, "mod5")) return WLR_MODIFIER_MOD5;
fprintf(stderr, "swindle config: unknown modifier '%s', ignoring\n", name);
return 0;
}
/* Section parsers */
static void
parse_appearance(lua_State *L, CfgAppearance *a)
{
lua_getglobal(L, "appearance");
if (!lua_istable(L, -1)) {
fprintf(stderr, "swindle config: 'appearance' table missing' \n");
lua_pop(L, 1);
/* defaults */
a->inner_border_px = 1;
a->outer_border_px = 1;
a->gaps = 10;
a->smart_gaps = false;
parse_color_hex(0x222222ff, a->root_color);
parse_color_hex(0x00000000, a->inner_border_color);
parse_color_hex(0x00000000, a->outer_border_color);
parse_color_hex(0xe8e8e8ff, a->inner_focus_color);
parse_color_hex(0xe8e8e8ff, a->outer_focus_color);
parse_color_hex(0xff0000ff, a->inner_urgent_color);
parse_color_hex(0xff0000ff, a->outer_urgent_color);
a->fullscreen_bg[3] = 1.0f;
a->active_opacity = 1.0f;
a->inactive_opacity = 1.0f;
return;
}
a->inner_border_px = (unsigned int)lua_get_int(L, "inner_border_px", 1);
a->outer_border_px = (unsigned int)lua_get_int(L, "outer_border_px", 1);
a->gaps = (unsigned int)lua_get_int(L, "gaps", 10);
a->smart_gaps = lua_get_bool(L, "smart_gaps", false);
lua_get_color(L, "root_color", a->root_color, 0.133f,0.133f,0.133f,1.f);
lua_get_color(L, "inner_border_color", a->inner_border_color, 0.f,0.f,0.f,0.f);
lua_get_color(L, "outer_border_color", a->outer_border_color, 0.f,0.f,0.f,0.f);
lua_get_color(L, "inner_focus_color", a->inner_focus_color, 0.91f,0.91f,0.91f,1.f);
lua_get_color(L, "outer_focus_color", a->outer_focus_color, 0.91f,0.91f,0.91f,1.f);
lua_get_color(L, "inner_urgent_color", a->inner_urgent_color, 1.f,0.f,0.f,1.f);
lua_get_color(L, "outer_urgent_color", a->outer_urgent_color, 1.f,0.f,0.f,1.f);
a->active_opacity = lua_get_opacity(L, "active_opacity", 1.0f);
a->inactive_opacity = lua_get_opacity(L, "inactive_opacity", 1.0f);
lua_getfield(L, -1, "fullscreen_bg");
if (lua_isnumber(L, -1))
parse_color_hex((uint32_t)lua_tointeger(L, -1), a->fullscreen_bg);
else {
a->fullscreen_bg[0] = 0.f;
a->fullscreen_bg[1] = 0.f;
a->fullscreen_bg[2] = 0.f;
a->fullscreen_bg[3] = 1.f;
}
lua_pop(L, 1);
lua_pop(L, 1); /* pop appearance table */
}
static void
parse_input(lua_State *L, CfgInput *inp)
{
lua_getglobal(L, "input");
if (!lua_istable(L, -1)) {
fprintf(stderr, "swindle config: 'input' table missing, "
"using defaults. You'll feel the repeat delay.\n");
lua_pop(L, 1);
inp->repeat_rate = 50;
inp->repeat_delay = 150;
inp->tap_to_click = true;
inp->accel_profile = LIBINPUT_CONFIG_ACCEL_PROFILE_ADAPTIVE;
strcpy(inp->layout, "us");
return;
}
inp->repeat_rate = lua_get_int (L, "repeat_rate", 50);
inp->repeat_delay = lua_get_int (L, "repeat_delay", 150);
inp->tap_to_click = lua_get_bool(L, "tap_to_click", true);
inp->tap_and_drag = lua_get_bool(L, "tap_and_drag", true);
inp->drag_lock = lua_get_bool(L, "drag_lock", true);
inp->natural_scrolling = lua_get_bool(L, "natural_scrolling", false);
inp->disable_while_typing = lua_get_bool(L, "disable_while_typing", true);
inp->left_handed = lua_get_bool(L, "left_handed", false);
inp->middle_button_emulation= lua_get_bool(L, "middle_button_emulation",false);
inp->accel_speed = lua_get_double(L, "accel_speed", 0.0);
lua_get_string(L, "layout", inp->layout, sizeof(inp->layout));
lua_get_string(L, "variant", inp->variant, sizeof(inp->variant));
lua_get_string(L, "model", inp->model, sizeof(inp->model));
lua_get_string(L, "options", inp->options, sizeof(inp->options));
if (!inp->layout[0]) strcpy(inp->layout, "us");
char scratch[CFG_MAX_STRLEN] = {0};
lua_get_string(L, "scroll_method", scratch, sizeof(scratch));
if (!strcmp(scratch, "2fg")) inp->scroll_method = LIBINPUT_CONFIG_SCROLL_2FG;
else if (!strcmp(scratch, "edge")) inp->scroll_method = LIBINPUT_CONFIG_SCROLL_EDGE;
else if (!strcmp(scratch, "button")) inp->scroll_method = LIBINPUT_CONFIG_SCROLL_ON_BUTTON_DOWN;
else inp->scroll_method = LIBINPUT_CONFIG_SCROLL_2FG;
lua_get_string(L, "accel_profile", scratch, sizeof(scratch));
if (!strcmp(scratch, "flat")) inp->accel_profile = LIBINPUT_CONFIG_ACCEL_PROFILE_FLAT;
else inp->accel_profile = LIBINPUT_CONFIG_ACCEL_PROFILE_ADAPTIVE;
lua_get_string(L, "click_method", scratch, sizeof(scratch));
if (!strcmp(scratch, "clickfinger")) inp->click_method = LIBINPUT_CONFIG_CLICK_METHOD_CLICKFINGER;
else if (!strcmp(scratch, "button_areas")) inp->click_method = LIBINPUT_CONFIG_CLICK_METHOD_BUTTON_AREAS;
else inp->click_method = LIBINPUT_CONFIG_CLICK_METHOD_BUTTON_AREAS;
lua_get_string(L, "send_events_mode", scratch, sizeof(scratch));
if (!strcmp(scratch, "disabled")) inp->send_events_mode = LIBINPUT_CONFIG_SEND_EVENTS_DISABLED;
else if (!strcmp(scratch, "disabled_on_external")) inp->send_events_mode = LIBINPUT_CONFIG_SEND_EVENTS_DISABLED_ON_EXTERNAL_MOUSE;
else inp->send_events_mode = LIBINPUT_CONFIG_SEND_EVENTS_ENABLED;
lua_get_string(L, "tap_button_map", scratch, sizeof(scratch));
if (!strcmp(scratch, "lmr")) inp->tap_button_map = LIBINPUT_CONFIG_TAP_MAP_LMR;
else inp->tap_button_map = LIBINPUT_CONFIG_TAP_MAP_LRM;
lua_pop(L, 1);
}
static void
parse_rules(lua_State *L, Config *cfg)
{
lua_getglobal(L, "rules");
if (!lua_istable(L, -1)) {
lua_pop(L, 1);
return;
}
cfg->nrules = 0;
int n = (int)lua_rawlen(L, -1);
for (int i = 1; i <= n && cfg->nrules < CFG_MAX_RULES; i++) {
lua_rawgeti(L, -1, i);
if (!lua_istable(L, -1)) { lua_pop(L, 1); continue; }
CfgRule *r = &cfg->rules[cfg->nrules++];
memset(r, 0, sizeof(*r));
lua_get_string(L, "app_id", r->app_id, sizeof(r->app_id));
lua_get_string(L, "title", r->title, sizeof(r->title));
r->tags = (uint32_t)lua_get_int(L, "tags", 0);
r->floating = lua_get_bool(L, "floating", false);
r->monitor = lua_get_int(L, "monitor", -1);
lua_pop(L, 1);
}
lua_pop(L, 1);
}
static void
parse_monitors(lua_State *L, Config *cfg)
{
lua_getglobal(L, "monitors");
if (!lua_istable(L, -1)) {
lua_pop(L, 1);
cfg->nmonitors = 1;
CfgMonitorRule *m = &cfg->monitors[0];
memset(m, 0, sizeof(*m));
m->mfact = 0.55f;
m->nmaster = 1;
m->scale = 1.0f;
strcpy(m->layout, "dwindle");
m->x = m->y = -1;
return;
}
cfg->nmonitors = 0;
int n = (int)lua_rawlen(L, -1);
for (int i = 1; i <= n && cfg->nmonitors < CFG_MAX_MONITORS; i++) {
lua_rawgeti(L, -1, i);
if (!lua_istable(L, -1)) { lua_pop(L, 1); continue; }
CfgMonitorRule *m = &cfg->monitors[cfg->nmonitors++];
memset(m, 0, sizeof(*m));
lua_getfield(L, -1, "name");
if (lua_isstring(L, -1))
strncpy(m->name, lua_tostring(L, -1), sizeof(m->name)-1);
lua_pop(L, 1);
m->mfact = (float)lua_get_double(L, "mfact", 0.55);
m->nmaster = lua_get_int (L, "nmaster", 1);
m->scale = (float)lua_get_double(L, "scale", 1.0);
m->x = lua_get_int (L, "x", -1);
m->y = lua_get_int (L, "y", -1);
m->transform = lua_get_int (L, "transform", 0);
lua_get_string(L, "layout", m->layout, sizeof(m->layout));
if (!m->layout[0]) strcpy(m->layout, "dwindle");
lua_pop(L, 1);
}
lua_pop(L, 1);
}
static void
parse_keybinds(lua_State *L, Config *cfg)
{
lua_getglobal(L, "keybinds");
if (!lua_istable(L, -1)) {
lua_pop(L, 1);
return;
}
cfg->nkeybinds = 0;
struct xkb_context *xkb_ctx = xkb_context_new(XKB_CONTEXT_NO_FLAGS);
int n = (int)lua_rawlen(L, -1);
for (int i = 1; i <= n && cfg->nkeybinds < CFG_MAX_KEYBINDS; i++) {
lua_rawgeti(L, -1, i);
if (!lua_istable(L, -1)) { lua_pop(L, 1); continue; }
CfgKeybind *kb = &cfg->keybinds[cfg->nkeybinds];
memset(kb, 0, sizeof(*kb));
/* mods: array of strings */
kb->mods = 0;
lua_getfield(L, -1, "mods");
if (lua_istable(L, -1)) {
int nm = (int)lua_rawlen(L, -1);
for (int m = 1; m <= nm; m++) {
lua_rawgeti(L, -1, m);
if (lua_isstring(L, -1))
kb->mods |= parse_modifier(lua_tostring(L, -1));
lua_pop(L, 1);
}
}
lua_pop(L, 1);
/* key: string keysym name, e.g. "q", "Return", "XF86AudioMute" */
char keyname[CFG_MAX_STRLEN] = {0};
lua_get_string(L, "key", keyname, sizeof(keyname));
kb->key = xkb_keysym_from_name(keyname, XKB_KEYSYM_CASE_INSENSITIVE);
if (kb->key == XKB_KEY_NoSymbol) {
fprintf(stderr, "swindle config: unknown key '%s', skipping bind\n",
keyname);
lua_pop(L, 1); /* keybind entry table */
continue;
}
lua_get_string(L, "action", kb->action, sizeof(kb->action));
/* args: optional array of strings */
kb->nargs = 0;
lua_getfield(L, -1, "args");
if (lua_istable(L, -1)) {
int na = (int)lua_rawlen(L, -1);
for (int a = 1; a <= na && kb->nargs < CFG_MAX_ARGS; a++) {
lua_rawgeti(L, -1, a);
if (lua_isstring(L, -1))
strncpy(kb->args[kb->nargs++],
lua_tostring(L, -1),
CFG_MAX_STRLEN - 1);
lua_pop(L, 1);
}
}
lua_pop(L, 1); /* args */
cfg->nkeybinds++;
lua_pop(L, 1); /* keybind entry */
}
xkb_context_unref(xkb_ctx);
lua_pop(L, 1); /* keybinds table */
}
static void
parse_buttons(lua_State *L, Config *cfg)
{
lua_getglobal(L, "buttons");
if (!lua_istable(L, -1)) {
lua_pop(L, 1);
return;
}
cfg->nbuttons = 0;
int n = (int)lua_rawlen(L, -1);
for (int i = 1; i <= n && cfg->nbuttons < CFG_MAX_KEYBINDS; i++) {
lua_rawgeti(L, -1, i);
if (!lua_istable(L, -1)) { lua_pop(L, 1); continue; }
CfgButton *b = &cfg->buttons[cfg->nbuttons++];
memset(b, 0, sizeof(*b));
b->mods = 0;
lua_getfield(L, -1, "mods");
if (lua_istable(L, -1)) {
int nm = (int)lua_rawlen(L, -1);
for (int m = 1; m <= nm; m++) {
lua_rawgeti(L, -1, m);
if (lua_isstring(L, -1))
b->mods |= parse_modifier(lua_tostring(L, -1));
lua_pop(L, 1);
}
}
lua_pop(L, 1);
char btnname[CFG_MAX_STRLEN] = {0};
lua_get_string(L, "button", btnname, sizeof(btnname));
if (!strcmp(btnname, "left")) b->button = BTN_LEFT;
else if (!strcmp(btnname, "right")) b->button = BTN_RIGHT;
else if (!strcmp(btnname, "middle")) b->button = BTN_MIDDLE;
else b->button = (uint32_t)atoi(btnname);
lua_get_string(L, "action", b->action, sizeof(b->action));
b->nargs = 0;
lua_getfield(L, -1, "args");
if (lua_istable(L, -1)) {
int na = (int)lua_rawlen(L, -1);
for (int a = 1; a <= na && b->nargs < CFG_MAX_ARGS; a++) {
lua_rawgeti(L, -1, a);
if (lua_isstring(L, -1))
strncpy(b->args[b->nargs++],
lua_tostring(L, -1),
CFG_MAX_STRLEN - 1);
lua_pop(L, 1);
}
}
lua_pop(L, 1); /* args */
lua_pop(L, 1);
}
lua_pop(L, 1);
}
static void
parse_autostart(lua_State *L, Config *cfg)
{
lua_getglobal(L, "autostart");
if (!lua_istable(L, -1)) {
lua_pop(L, 1);
return;
}
cfg->nautostart = 0;
int n = (int)lua_rawlen(L, -1);
for (int i = 1; i <= n && cfg->nautostart < CFG_MAX_AUTOSTART; i++) {
lua_rawgeti(L, -1, i);
if (!lua_isstring(L, -1)) {
lua_pop(L, 1);
continue;
}
strncpy(cfg->autostart[cfg->nautostart].cmd,
lua_tostring(L, -1),
CFG_MAX_AUTOSTART_CMD - 1);
cfg->nautostart++;
lua_pop(L, 1);
}
lua_pop(L, 1);
}
/* Public API */
char *
config_get_path(char *buf, size_t bufsz)
{
const char *xdg = getenv("XDG_CONFIG_HOME");
if (xdg && *xdg)
snprintf(buf, bufsz, "%s/swindle/config.lua", xdg);
else {
const char *home = getenv("HOME");
if (!home) home = "/root"; /* you're probably root, aren't you */
snprintf(buf, bufsz, "%s/.config/swindle/config.lua", home);
}
return buf;
}
int
config_load(const char *path, Config *cfg)
{
memset(cfg, 0, sizeof(*cfg));
lua_State *L = luaL_newstate();
if (!L) {
fprintf(stderr, "swindle config: failed to create Lua state. "
"Truly rock bottom.\n");
return -1;
}
luaL_openlibs(L);
if (luaL_dofile(L, path) != LUA_OK) {
lua_log_error(L, "load");
lua_close(L);
return -1;
}
/* Top-level booleans */
lua_getglobal(L, "sloppy_focus");
cfg->sloppyfocus = lua_isboolean(L, -1) ? lua_toboolean(L, -1) : true;
lua_pop(L, 1);
lua_getglobal(L, "bypass_surface_visibility");
cfg->bypass_surface_visibility = lua_isboolean(L, -1)
? lua_toboolean(L, -1) : false;
lua_pop(L, 1);
lua_getglobal(L, "log_level");
if (lua_isstring(L, -1)) {
const char *ll = lua_tostring(L, -1);
if (!strcmp(ll, "silent")) cfg->log_level = WLR_SILENT;
else if (!strcmp(ll, "info")) cfg->log_level = WLR_INFO;
else if (!strcmp(ll, "debug")) cfg->log_level = WLR_DEBUG;
else cfg->log_level = WLR_ERROR;
} else {
cfg->log_level = WLR_ERROR;
}
lua_pop(L, 1);
parse_appearance(L, &cfg->appearance);
parse_input (L, &cfg->input);
parse_rules (L, cfg);
parse_monitors (L, cfg);
parse_keybinds (L, cfg);
parse_buttons (L, cfg);
parse_autostart (L, cfg);
lua_close(L);
return 0;
}
/* Apply functions */
void
config_apply_appearance(const Config *cfg)
{
(void)cfg;
}
void
config_apply_input(const Config *cfg)
{
(void)cfg;
}
void
config_apply_keybinds(const Config *cfg)
{
(void)cfg;
}
void
config_autostart_run(const Config *cfg)
{
if (cfg->nautostart == 0)
return;
pid_t pid = fork();
if (pid < 0) {
perror("swindle autostart: fork");
return;
}
if (pid != 0)
return; /* compositor continues (sequencer runs in child) */
/* The sequencer child resets any inherited signal handlers and becomes
* a new session so the compositor's SIGCHLD handling doesn't
* interfere with our waitpid calls. */
signal(SIGCHLD, SIG_DFL);
setsid();
for (int i = 0; i < cfg->nautostart; i++) {
const char *cmd = cfg->autostart[i].cmd;
pid_t cpid = fork();
if (cpid < 0) {
fprintf(stderr, "swindle autostart: fork for '%s': %s\n",
cmd, strerror(errno));
continue;
}
if (cpid == 0) {
execl("/bin/sh", "sh", "-c", cmd, NULL);
fprintf(stderr, "swindle autostart: exec '%s': %s\n",
cmd, strerror(errno));
_exit(1);
}
/* wait a second because one shotters will fly past, but
* daemon processes (some, like swaybg) won't because of
* daemon black magic. To say the least, it's good for the soul */
struct timespec deadline, now;
clock_gettime(CLOCK_MONOTONIC, &deadline);
deadline.tv_sec += 0.5;
int status;
int done = 0;
while (!done) {
pid_t r = waitpid(cpid, &status, WNOHANG);
if (r == cpid) {
done = 1;
if (WIFEXITED(status) && WEXITSTATUS(status) != 0)
fprintf(stderr, "swindle autostart: '%s' exited with status %d\n",
cmd, WEXITSTATUS(status));
} else {
clock_gettime(CLOCK_MONOTONIC, &now);
if (now.tv_sec > deadline.tv_sec ||
(now.tv_sec == deadline.tv_sec &&
now.tv_nsec >= deadline.tv_nsec))
break; /* looks like a daemon, move on */
struct timespec sl = { .tv_sec = 0, .tv_nsec = 50 * 1000 * 1000 };
nanosleep(&sl, NULL);
}
}
}
_exit(0);
}
/* inotify watcher */
static int
watch_dispatch(int fd, uint32_t mask, void *data)
{
WatchState *ws = data;
/* Drain the inotify events */
_Alignas(struct inotify_event) char buf[4096];
ssize_t len = read(fd, buf, sizeof(buf));
if (len < 0) {
if (errno != EAGAIN)
perror("swindle config: inotify read");
return 0;
}
/* Re-parse */
Config *fresh = calloc(1, sizeof(Config));
if (!fresh) return 0;
if (config_load(ws->path, fresh) == 0) {
fprintf(stderr, "swindle config: reloaded '%s'\n", ws->path);
if (ws->cb)
ws->cb(fresh, ws->userdata);
} else {
fprintf(stderr, "swindle config: reload failed, keeping old config. "
"Story of my life.\n");
}
free(fresh);
/*
* Some editors (vim, nano) delete-and-recreate files on save,
* which removes our watch (which is a pain in the ass.
* Hence, re-add it defensively. It's good for the soul)
*/
inotify_rm_watch(ws->inotify_fd, ws->watch_fd);
ws->watch_fd = inotify_add_watch(ws->inotify_fd, ws->path,
IN_CLOSE_WRITE | IN_MOVED_TO | IN_CREATE);
return 0;
}
struct wl_event_source *
config_watch_start(struct wl_event_loop *loop, const char *path,
config_reload_cb cb, void *userdata)
{
WatchState *ws = calloc(1, sizeof(*ws));
if (!ws) return NULL;
ws->inotify_fd = inotify_init1(IN_NONBLOCK | IN_CLOEXEC);
if (ws->inotify_fd < 0) {
perror("swindle config: inotify_init1");
free(ws);
return NULL;
}
ws->watch_fd = inotify_add_watch(ws->inotify_fd, path,
IN_CLOSE_WRITE | IN_MOVED_TO | IN_CREATE);
if (ws->watch_fd < 0) {
perror("swindle config: inotify_add_watch");
close(ws->inotify_fd);
free(ws);
return NULL;
}
strncpy(ws->path, path, sizeof(ws->path) - 1);
ws->cb = cb;
ws->userdata = userdata;
struct wl_event_source *src = wl_event_loop_add_fd(
loop, ws->inotify_fd,
WL_EVENT_READABLE,
watch_dispatch, ws
);
if (!src) {
fprintf(stderr, "swindle config: failed to add inotify to event loop. "
"Classic.\n");
close(ws->inotify_fd);
free(ws);
return NULL;
}
ws->event_src = src;
fprintf(stderr, "swindle config: watching '%s'\n", path);
return (struct wl_event_source *)ws;
}
void
config_watch_stop(struct wl_event_source *src)
{
if (!src) return;
WatchState *ws = (WatchState *)src;
wl_event_source_remove(ws->event_src);
close(ws->inotify_fd);
free(ws);
}