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desktop-tools/wmstatus.c

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/*
* wmstatus.c: simple PulseAudio-enabled status setter for dwm and i3/sway
*
* Copyright (c) 2015 - 2021, Přemysl Eric Janouch <p@janouch.name>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
*/
#define LIBERTY_WANT_POLLER
#define LIBERTY_WANT_ASYNC
#define LIBERTY_WANT_PROTO_MPD
#define _GNU_SOURCE // openat
#include "config.h"
#undef PROGRAM_NAME
#define PROGRAM_NAME "wmstatus"
#include "liberty/liberty.c"
#include "poller-pa.c"
#include <dirent.h>
#include <spawn.h>
#ifdef BSD
#include <sys/endian.h>
#endif
#include <X11/Xlib.h>
#include <X11/keysym.h>
#include <X11/XF86keysym.h>
#include <X11/XKBlib.h>
#include <X11/extensions/sync.h>
#include <pulse/context.h>
#include <pulse/error.h>
#include <pulse/introspect.h>
#include <pulse/subscribe.h>
#include <pulse/stream.h>
#include <pulse/sample.h>
#include <dbus/dbus.h>
// --- Utilities ---------------------------------------------------------------
enum { PIPE_READ, PIPE_WRITE };
static void
log_message_custom (void *user_data, const char *quote, const char *fmt,
va_list ap)
{
(void) user_data;
FILE *stream = stderr;
fprintf (stream, PROGRAM_NAME ": ");
fputs (quote, stream);
vfprintf (stream, fmt, ap);
fputs ("\n", stream);
}
// --- NUT ---------------------------------------------------------------------
// More or less copied and pasted from the MPD client. This code doesn't even
// deserve much love, the protocol is somehow even worse than MPD's.
//
// http://www.networkupstools.org/docs/developer-guide.chunked/ar01s09.html
// This was written by loosely following the top comment in NUT's parseconf.c.
enum nut_parser_state
{
NUT_STATE_START_LINE, ///< Start of a line
NUT_STATE_BETWEEN, ///< Between words, expecting non-WS
NUT_STATE_UNQUOTED, ///< Within unquoted word
NUT_STATE_UNQUOTED_ESCAPE, ///< Dtto after a backslash
NUT_STATE_QUOTED, ///< Within a quoted word
NUT_STATE_QUOTED_ESCAPE, ///< Dtto after a backslash
NUT_STATE_QUOTED_END ///< End of word, expecting WS
};
struct nut_parser
{
enum nut_parser_state state; ///< Parser state
struct str current_field; ///< Current field
// Public:
struct strv fields; ///< Line fields
};
static void
nut_parser_init (struct nut_parser *self)
{
self->state = NUT_STATE_START_LINE;
self->current_field = str_make ();
self->fields = strv_make ();
}
static void
nut_parser_free (struct nut_parser *self)
{
str_free (&self->current_field);
strv_free (&self->fields);
}
static int
nut_parser_end_field (struct nut_parser *self, char c)
{
strv_append (&self->fields, self->current_field.str);
str_reset (&self->current_field);
if (c == '\n')
{
self->state = NUT_STATE_START_LINE;
return 1;
}
self->state = NUT_STATE_BETWEEN;
return 0;
}
/// Returns 1 if a complete line has been read, -1 on error, 0 otherwise
static int
nut_parser_push (struct nut_parser *self, char c)
{
switch (self->state)
{
case NUT_STATE_START_LINE:
strv_reset (&self->fields);
str_reset (&self->current_field);
self->state = NUT_STATE_BETWEEN;
// Fall-through
case NUT_STATE_BETWEEN:
if (c == '\\')
self->state = NUT_STATE_UNQUOTED_ESCAPE;
else if (c == '"')
self->state = NUT_STATE_QUOTED;
else if (c == '\n' && self->fields.len)
{
self->state = NUT_STATE_START_LINE;
return 1;
}
else if (!isspace_ascii (c))
{
str_append_c (&self->current_field, c);
self->state = NUT_STATE_UNQUOTED;
}
return 0;
case NUT_STATE_UNQUOTED:
if (c == '\\')
self->state = NUT_STATE_UNQUOTED_ESCAPE;
else if (c == '"')
return -1;
else if (!isspace_ascii (c))
str_append_c (&self->current_field, c);
else
return nut_parser_end_field (self, c);
return 0;
case NUT_STATE_UNQUOTED_ESCAPE:
str_append_c (&self->current_field, c);
self->state = NUT_STATE_UNQUOTED;
return 0;
case NUT_STATE_QUOTED:
if (c == '\\')
self->state = NUT_STATE_QUOTED_ESCAPE;
else if (c == '"')
self->state = NUT_STATE_QUOTED_END;
else
str_append_c (&self->current_field, c);
return 0;
case NUT_STATE_QUOTED_ESCAPE:
str_append_c (&self->current_field, c);
self->state = NUT_STATE_QUOTED;
return 0;
case NUT_STATE_QUOTED_END:
if (!isspace_ascii (c))
return -1;
return nut_parser_end_field (self, c);
}
// Silence the compiler
hard_assert (!"unhandled NUT parser state");
return -1;
}
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
struct nut_line
{
LIST_HEADER (struct nut_line)
struct strv fields; ///< Parsed fields from the line
};
struct nut_response
{
struct nut_line *data; ///< Raw result data
bool success; ///< Whether a general failure occured
char *message; ///< Eventually an error ID string
};
/// Task completion callback
typedef void (*nut_client_task_cb)
(const struct nut_response *response, void *user_data);
struct nut_client_task
{
LIST_HEADER (struct nut_client_task)
nut_client_task_cb callback; ///< Callback on completion
void *user_data; ///< User data
};
enum nut_client_state
{
NUT_DISCONNECTED, ///< Not connected
NUT_CONNECTING, ///< Currently connecting
NUT_CONNECTED ///< Connected
};
struct nut_client
{
struct poller *poller; ///< Poller
// Connection:
enum nut_client_state state; ///< Connection state
struct connector *connector; ///< Connection establisher
int socket; ///< MPD socket
struct str read_buffer; ///< Input yet to be processed
struct str write_buffer; ///< Outut yet to be be sent out
struct poller_fd socket_event; ///< We can read from the socket
// Protocol:
struct nut_parser parser; ///< Protocol parser
struct nut_line *data; ///< Data from last command
struct nut_line *data_tail; ///< Tail of data list
bool in_list; ///< Currently within a list
struct nut_client_task *tasks; ///< Task queue
struct nut_client_task *tasks_tail; ///< Tail of task queue
// User configuration:
void *user_data; ///< User data for callbacks
/// Callback after connection has been successfully established
void (*on_connected) (void *user_data);
/// Callback for general failures or even normal disconnection;
/// the interface is reinitialized
void (*on_failure) (void *user_data);
};
static void nut_client_reset (struct nut_client *self);
static void nut_client_destroy_connector (struct nut_client *self);
static void
nut_client_init (struct nut_client *self, struct poller *poller)
{
memset (self, 0, sizeof *self);
self->poller = poller;
self->socket = -1;
self->read_buffer = str_make ();
self->write_buffer = str_make ();
nut_parser_init (&self->parser);
self->socket_event = poller_fd_make (poller, -1);
}
static void
nut_client_free (struct nut_client *self)
{
// So that we don't have to repeat most of the stuff
nut_client_reset (self);
str_free (&self->read_buffer);
str_free (&self->write_buffer);
nut_parser_free (&self->parser);
}
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
static void
nut_client_flush_data (struct nut_client *self)
{
LIST_FOR_EACH (struct nut_line, iter, self->data)
{
strv_free (&iter->fields);
free (iter);
}
self->data = self->data_tail = NULL;
}
/// Reinitialize the interface so that you can reconnect anew
static void
nut_client_reset (struct nut_client *self)
{
if (self->state == NUT_CONNECTING)
nut_client_destroy_connector (self);
if (self->socket != -1)
xclose (self->socket);
self->socket = -1;
self->socket_event.closed = true;
poller_fd_reset (&self->socket_event);
str_reset (&self->read_buffer);
str_reset (&self->write_buffer);
self->parser.state = NUT_STATE_START_LINE;
nut_client_flush_data (self);
self->in_list = false;
LIST_FOR_EACH (struct nut_client_task, iter, self->tasks)
free (iter);
self->tasks = self->tasks_tail = NULL;
self->state = NUT_DISCONNECTED;
}
static void
nut_client_fail (struct nut_client *self)
{
nut_client_reset (self);
if (self->on_failure)
self->on_failure (self->user_data);
}
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
static void
nut_client_quote (const char *s, struct str *output)
{
str_append_c (output, '"');
for (; *s; s++)
{
if (*s == '"' || *s == '\\')
str_append_c (output, '\\');
str_append_c (output, *s);
}
str_append_c (output, '"');
}
static bool
nut_client_must_quote (const char *s)
{
if (!*s)
return true;
for (; *s; s++)
if ((unsigned char) *s <= ' ' || *s == '"' || *s == '\\')
return true;
return false;
}
static void
nut_client_serialize (char **commands, struct str *line)
{
for (; *commands; commands++)
{
if (line->len)
str_append_c (line, ' ');
if (nut_client_must_quote (*commands))
nut_client_quote (*commands, line);
else
str_append (line, *commands);
}
}
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
static void
nut_client_dispatch (struct nut_client *self, struct nut_response *response)
{
struct nut_client_task *task;
if (!(task = self->tasks))
return;
if (task->callback)
task->callback (response, task->user_data);
nut_client_flush_data (self);
LIST_UNLINK_WITH_TAIL (self->tasks, self->tasks_tail, task);
free (task);
}
static bool
nut_client_parse_line (struct nut_client *self)
{
struct str reconstructed = str_make ();
nut_client_serialize (self->parser.fields.vector, &reconstructed);
print_debug ("NUT >> %s", reconstructed.str);
str_free (&reconstructed);
struct strv *fields = &self->parser.fields;
hard_assert (fields->len != 0);
// Lists are always dispatched as their innards (and they can be empty)
if (fields->len >= 2
&& !strcmp (fields->vector[0], "BEGIN")
&& !strcmp (fields->vector[1], "LIST"))
self->in_list = true;
else if (fields->len >= 2
&& !strcmp (fields->vector[0], "END")
&& !strcmp (fields->vector[1], "LIST"))
self->in_list = false;
else
{
struct nut_line *line = xcalloc (1, sizeof *line);
line->fields = strv_make ();
strv_append_vector (&line->fields, fields->vector);
LIST_APPEND_WITH_TAIL (self->data, self->data_tail, line);
}
if (!self->in_list)
{
struct nut_response response;
memset (&response, 0, sizeof response);
response.success = true;
response.data = self->data;
if (!strcmp (fields->vector[0], "ERR"))
{
response.success = false;
if (fields->len < 2)
return false;
response.message = xstrdup (fields->vector[1]);
}
nut_client_dispatch (self, &response);
free (response.message);
}
return true;
}
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
static void
nut_client_update_poller (struct nut_client *self)
{
poller_fd_set (&self->socket_event,
self->write_buffer.len ? (POLLIN | POLLOUT) : POLLIN);
}
static bool
nut_client_process_input (struct nut_client *self)
{
struct str *rb = &self->read_buffer;
for (size_t i = 0; i < rb->len; i++)
{
int res = nut_parser_push (&self->parser, rb->str[i]);
if (res == -1 || (res == 1 && !nut_client_parse_line (self)))
return false;
}
str_reset (rb);
return true;
}
static void
nut_client_on_ready (const struct pollfd *pfd, void *user_data)
{
(void) pfd;
struct nut_client *self = user_data;
bool read_succeeded = socket_io_try_read
(self->socket, &self->read_buffer) == SOCKET_IO_OK;
// Whether or not the read was successful, we need to process all data
if (!nut_client_process_input (self) || !read_succeeded
|| socket_io_try_write (self->socket, &self->write_buffer) != SOCKET_IO_OK)
nut_client_fail (self);
else
nut_client_update_poller (self);
}
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
/// Beware that delivery of the event isn't deferred and you musn't make
/// changes to the interface while processing the event!
static void
nut_client_add_task
(struct nut_client *self, nut_client_task_cb cb, void *user_data)
{
struct nut_client_task *task = xcalloc (1, sizeof *self);
task->callback = cb;
task->user_data = user_data;
LIST_APPEND_WITH_TAIL (self->tasks, self->tasks_tail, task);
}
/// Send a command. Remember to call nut_client_add_task() to handle responses,
/// unless the command generates none.
static void nut_client_send_command
(struct nut_client *self, const char *command, ...) ATTRIBUTE_SENTINEL;
static void
nut_client_send_commandv (struct nut_client *self, char **commands)
{
struct str line = str_make ();
nut_client_serialize (commands, &line);
print_debug ("NUT << %s", line.str);
str_append_c (&line, '\n');
str_append_str (&self->write_buffer, &line);
str_free (&line);
nut_client_update_poller (self);
}
static void
nut_client_send_command (struct nut_client *self, const char *command, ...)
{
struct strv v = strv_make ();
va_list ap;
va_start (ap, command);
for (; command; command = va_arg (ap, const char *))
strv_append (&v, command);
va_end (ap);
nut_client_send_commandv (self, v.vector);
strv_free (&v);
}
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
static void
nut_client_finish_connection (struct nut_client *self, int socket)
{
set_blocking (socket, false);
self->socket = socket;
self->state = NUT_CONNECTED;
self->socket_event = poller_fd_make (self->poller, self->socket);
self->socket_event.dispatcher = nut_client_on_ready;
self->socket_event.user_data = self;
nut_client_update_poller (self);
if (self->on_connected)
self->on_connected (self->user_data);
}
static void
nut_client_destroy_connector (struct nut_client *self)
{
if (self->connector)
connector_free (self->connector);
free (self->connector);
self->connector = NULL;
// Not connecting anymore
self->state = NUT_DISCONNECTED;
}
static void
nut_client_on_connector_failure (void *user_data)
{
struct nut_client *self = user_data;
nut_client_destroy_connector (self);
nut_client_fail (self);
}
static void
nut_client_on_connector_connected
(void *user_data, int socket, const char *host)
{
(void) host;
struct nut_client *self = user_data;
nut_client_destroy_connector (self);
nut_client_finish_connection (self, socket);
}
static void
nut_client_connect
(struct nut_client *self, const char *address, const char *service)
{
hard_assert (self->state == NUT_DISCONNECTED);
struct connector *connector = xmalloc (sizeof *connector);
connector_init (connector, self->poller);
self->connector = connector;
connector->user_data = self;
connector->on_connected = nut_client_on_connector_connected;
connector->on_failure = nut_client_on_connector_failure;
connector_add_target (connector, address, service);
self->state = NUT_CONNECTING;
}
// --- Backends ----------------------------------------------------------------
struct backend
{
/// Initialization
void (*start) (struct backend *self);
/// Deinitialization
void (*stop) (struct backend *self);
/// Destroy the backend object
void (*destroy) (struct backend *self);
/// Add another entry to the status
void (*add) (struct backend *self, const char *entry);
/// Flush the status to the window manager
void (*flush) (struct backend *self);
};
// --- DWM backend -------------------------------------------------------------
struct backend_dwm
{
struct backend super; ///< Parent class
Display *dpy; ///< X11 Display
struct strv items; ///< Items on the current row
};
static void
backend_dwm_destroy (struct backend *b)
{
struct backend_dwm *self = CONTAINER_OF (b, struct backend_dwm, super);
strv_free (&self->items);
free (self);
}
static void
backend_dwm_add (struct backend *b, const char *entry)
{
struct backend_dwm *self = CONTAINER_OF (b, struct backend_dwm, super);
strv_append (&self->items, entry);
}
static void
backend_dwm_flush (struct backend *b)
{
struct backend_dwm *self = CONTAINER_OF (b, struct backend_dwm, super);
char *str = strv_join (&self->items, " ");
strv_reset (&self->items);
// We don't have formatting, so let's at least quote those spans
for (char *p = str; *p; p++)
if (*p == '\001')
*p = '"';
print_debug ("setting status to: %s", str);
XStoreName (self->dpy, DefaultRootWindow (self->dpy), str);
XSync (self->dpy, False);
free (str);
}
static struct backend *
backend_dwm_new (Display *dpy)
{
struct backend_dwm *self = xcalloc (1, sizeof *self);
self->super.destroy = backend_dwm_destroy;
self->super.add = backend_dwm_add;
self->super.flush = backend_dwm_flush;
self->dpy = dpy;
self->items = strv_make ();
return &self->super;
}
// --- i3bar backend -----------------------------------------------------------
struct backend_i3
{
struct backend super; ///< Parent class
struct strv items; ///< Items on the current row
};
static void
backend_i3_destroy (struct backend *b)
{
struct backend_dwm *self = CONTAINER_OF (b, struct backend_dwm, super);
strv_free (&self->items);
free (self);
}
static void
backend_i3_start (struct backend *b)
{
(void) b;
// Start with an empty array so that we can later start with a comma
// as i3bar's JSON library is quite pedantic
fputs ("{\"version\":1}\n[[]", stdout);
}
static void
backend_i3_stop (struct backend *b)
{
(void) b;
fputc (']', stdout);
}
static void
backend_i3_add (struct backend *b, const char *entry)
{
struct backend_i3 *self = CONTAINER_OF (b, struct backend_i3, super);
strv_append (&self->items, entry);
}
static void
backend_i3_flush (struct backend *b)
{
struct backend_i3 *self = CONTAINER_OF (b, struct backend_i3, super);
fputs (",[", stdout);
for (size_t i = 0; i < self->items.len; i++)
{
if (i) fputc (',', stdout);
const char *str = self->items.vector[i];
size_t len = strlen (str);
if (!soft_assert (utf8_validate (str, len)))
continue;
fputs ("{\"full_text\":\"", stdout);
bool bold = false;
for (const char *p = str; *p; p++)
if (*p == '"') fputs ("\\\"", stdout);
else if (*p == '\\') fputs ("\\\\", stdout);
else if (*p == '<') fputs ("&lt;", stdout);
else if (*p == '>') fputs ("&gt;", stdout);
else if (*p == '&') fputs ("&amp;", stdout);
else if (*p == '\001')
fputs ((bold = !bold)
? "<span weight='bold'>" : "</span>", stdout);
else
fputc (*p, stdout);
if (bold)
fputs ("</span>", stdout);
fputs ("\",\"separator\":false,\"markup\":\"pango\"}", stdout);
}
fputs ("]\n", stdout);
// We need to flush the pipe explicitly to get i3bar to update
fflush (stdout);
strv_reset (&self->items);
}
static struct backend *
backend_i3_new (void)
{
struct backend_i3 *self = xcalloc (1, sizeof *self);
self->super.start = backend_i3_start;
self->super.stop = backend_i3_stop;
self->super.add = backend_i3_add;
self->super.flush = backend_i3_flush;
self->items = strv_make ();
return &self->super;
}
// --- Configuration -----------------------------------------------------------
static struct simple_config_item g_config_table[] =
{
{ "mpd_address", "localhost", "MPD host or socket" },
{ "mpd_service", "6600", "MPD service name or port" },
{ "mpd_password", NULL, "MPD password" },
{ "nut_enabled", "off", "NUT UPS status reading enabled" },
{ "nut_load_thld", "50", "NUT threshold for load display" },
// This is just a hack because my UPS doesn't report that value; a more
// proper way of providing this information would be by making use of the
// enhanced configuration format and allowing arbitrary per-UPS overrides
{ "nut_load_power", NULL, "ups.realpower.nominal override" },
{ "command", NULL, "command to run for more info" },
{ "sleep_timer", NULL, "idle seconds to suspend after" },
{ NULL, NULL, NULL }
};
// --- Application -------------------------------------------------------------
struct app_context
{
struct str_map config; ///< Program configuration
struct backend *backend; ///< WM backend
Display *dpy; ///< X display handle
struct poller_fd x_event; ///< X11 event
const char *prefix; ///< User-defined prefix
struct poller poller; ///< Poller
struct poller_timer time_changed; ///< Time change timer
struct poller_timer make_context; ///< Start PulseAudio communication
struct poller_timer refresh_rest; ///< Refresh unpollable information
// Sleep timer:
int xsync_base_event_code; ///< XSync base event code
XSyncCounter idle_counter; ///< XSync IDLETIME counter
XSyncValue idle_timeout; ///< Sleep timeout
XSyncAlarm idle_alarm_inactive; ///< User is inactive
XSyncAlarm idle_alarm_active; ///< User is active
// Command:
struct poller_timer command_start; ///< Start the command
struct strv command_current; ///< Current output of the command
pid_t command_pid; ///< PID of the command process
int command_fd; ///< I/O socket
struct poller_fd command_event; ///< I/O event
struct str command_buffer; ///< Unprocessed input
// Hotkeys:
int xkb_base_event_code; ///< Xkb base event code
char *layout; ///< Keyboard layout
// Insomnia:
DBusConnection *system_bus; ///< System bus connection
char *insomnia_info; ///< Status message (possibly error)
int insomnia_fd; ///< Inhibiting file descriptor
// MPD:
struct poller_timer mpd_reconnect; ///< Start MPD communication
struct mpd_client mpd_client; ///< MPD client
char *mpd_song; ///< MPD current song
char *mpd_status; ///< MPD status (overrides song)
// NUT:
struct poller_timer nut_reconnect; ///< Start NUT communication
struct nut_client nut_client; ///< NUT client
struct str_map nut_ups_info; ///< Per-UPS information
bool nut_success; ///< Information retrieved successfully
char *nut_status; ///< NUT status
// PulseAudio:
pa_mainloop_api *api; ///< PulseAudio event loop proxy
pa_context *context; ///< PulseAudio connection context
bool failed; ///< General PulseAudio failure
pa_sample_spec sink_sample_spec; ///< Sink sample spec
pa_cvolume sink_volume; ///< Current volume
bool sink_muted; ///< Currently muted?
struct strv sink_ports; ///< All sink port names
char *sink_port_active; ///< Active sink port
bool source_muted; ///< Currently muted?
// Noise playback:
struct poller_timer noise_timer; ///< Update noise timer display, or stop
pa_stream *noise_stream; ///< PulseAudio stream for noise playing
time_t noise_end_time; ///< End time of noise production, or 0
float noise_state[2]; ///< Brownian noise state
int noise_fadeout_iterator; ///< Fadeout iterator, in samples
int noise_fadeout_samples; ///< Sample count for fadeout
};
static void
str_map_destroy (void *self)
{
str_map_free (self);
free (self);
}
static void
app_context_init_xsync (struct app_context *self)
{
int n;
if (!XSyncQueryExtension (self->dpy, &self->xsync_base_event_code, &n)
|| !XSyncInitialize (self->dpy, &n, &n))
{
print_error ("cannot initialize XSync");
return;
}
// The idle counter is not guaranteed to exist, only SERVERTIME is
XSyncSystemCounter *counters = XSyncListSystemCounters (self->dpy, &n);
while (n--)
{
if (!strcmp (counters[n].name, "IDLETIME"))
self->idle_counter = counters[n].counter;
}
if (!self->idle_counter)
print_error ("idle counter is missing");
XSyncFreeSystemCounterList (counters);
}
static void
app_context_init (struct app_context *self)
{
memset (self, 0, sizeof *self);
self->config = str_map_make (free);
simple_config_load_defaults (&self->config, g_config_table);
if (!(self->dpy = XkbOpenDisplay
(NULL, &self->xkb_base_event_code, NULL, NULL, NULL, NULL)))
exit_fatal ("cannot open display");
poller_init (&self->poller);
self->api = poller_pa_new (&self->poller);
self->command_current = strv_make ();
self->command_pid = -1;
self->command_fd = -1;
self->command_event = poller_fd_make (&self->poller, -1);
self->command_buffer = str_make ();
set_cloexec (ConnectionNumber (self->dpy));
self->x_event =
poller_fd_make (&self->poller, ConnectionNumber (self->dpy));
app_context_init_xsync (self);
// So far we don't necessarily need DBus to function,
// and we have no desire to process any incoming messages either
DBusError err = DBUS_ERROR_INIT;
self->insomnia_fd = -1;
if (!(self->system_bus = dbus_bus_get (DBUS_BUS_SYSTEM, &err)))
{
print_error ("dbus: %s", err.message);
dbus_error_free (&err);
}
self->mpd_client = mpd_client_make (&self->poller);
nut_client_init (&self->nut_client, &self->poller);
self->nut_ups_info = str_map_make (str_map_destroy);
self->sink_ports = strv_make ();
}
static void
app_context_free (struct app_context *self)
{
str_map_free (&self->config);
if (self->backend) self->backend->destroy (self->backend);
poller_fd_reset (&self->x_event);
cstr_set (&self->layout, NULL);
if (self->noise_stream) pa_stream_unref (self->noise_stream);
if (self->context) pa_context_unref (self->context);
if (self->dpy) XCloseDisplay (self->dpy);
strv_free (&self->command_current);
if (self->command_pid != -1)
(void) kill (self->command_pid, SIGTERM);
if (self->command_fd != -1)
{
poller_fd_reset (&self->command_event);
xclose (self->command_fd);
}
str_free (&self->command_buffer);
cstr_set (&self->insomnia_info, NULL);
if (self->insomnia_fd != -1)
xclose (self->insomnia_fd);
mpd_client_free (&self->mpd_client);
cstr_set (&self->mpd_song, NULL);
cstr_set (&self->mpd_status, NULL);
nut_client_free (&self->nut_client);
str_map_free (&self->nut_ups_info);
cstr_set (&self->nut_status, NULL);
strv_free (&self->sink_ports);
cstr_set (&self->sink_port_active, NULL);
poller_pa_destroy (self->api);
poller_free (&self->poller);
}
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
static char *
read_value (int dir, const char *filename, struct error **e)
{
int fd = openat (dir, filename, O_RDONLY);
if (fd < 0)
{
error_set (e, "%s: %s: %s", filename, "openat", strerror (errno));
return NULL;
}
FILE *fp = fdopen (fd, "r");
if (!fp)
{
error_set (e, "%s: %s: %s", filename, "fdopen", strerror (errno));
close (fd);
return NULL;
}
errno = 0;
struct str s = str_make ();
bool success = read_line (fp, &s) && !ferror (fp);
fclose (fp);
if (!success)
{
error_set (e, "%s: %s", filename, errno ? strerror (errno) : "EOF");
return NULL;
}
return str_steal (&s);
}
static unsigned long
read_number (int dir, const char *filename, struct error **e)
{
char *value;
if (!(value = read_value (dir, filename, e)))
return false;
unsigned long number = 0;
if (!xstrtoul (&number, value, 10))
error_set (e, "%s: %s", filename, "doesn't contain a valid number");
free (value);
return number;
}
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
static int
read_battery_charge (int dir)
{
struct error *error = NULL;
double capacity, now, full;
if ((capacity = read_number (dir, "capacity", &error), !error))
return capacity;
error_free (error);
if ((now = read_number (dir, "charge_now", &error), !error)
&& (full = read_number (dir, "charge_full", &error), !error))
return now / full * 100 + 0.5;
error_free (error);
return -1;
}
static char *
read_battery_status (int dir, char **type)
{
// We present errors to the user, don't fill up the session's log.
struct error *error = NULL;
struct str s = str_make ();
// Dell is being unreasonable and seems to set charge_now
// to charge_full_design when the battery is fully charged
int charge = read_battery_charge (dir);
if (charge >= 0 && charge <= 100)
str_append_printf (&s, "%u%%", charge);
char *status = NULL;
char *model_name = read_value (dir, "model_name", NULL);
if (model_name)
{
model_name[strcspn (model_name, " ")] = 0;
cstr_set (type, model_name);
}
else if ((status = read_value (dir, "status", &error), !error))
{
str_append_printf (&s, " (%s)", status);
free (status);
}
else
{
str_append_printf (&s, " (%s)", strerror (errno));
error_free (error);
}
return str_steal (&s);
}
static char *
try_power_supply (int dir, struct error **e)
{
char *type;
struct error *error = NULL;
if (!(type = read_value (dir, "type", &error)))
{
error_propagate (e, error);
return NULL;
}
bool is_relevant =
!strcmp (type, "Battery") ||
!strcmp (type, "USB") ||
!strcmp (type, "UPS");
char *result = NULL;
if (is_relevant)
{
char *status = read_battery_status (dir, &type);
if (status)
result = xstrdup_printf ("%s %s", type, status);
free (status);
}
free (type);
return result;
}
static char *
make_battery_status (void)
{
DIR *power_supply = opendir ("/sys/class/power_supply");
if (!power_supply)
{
print_debug ("cannot access %s: %s: %s",
"/sys/class/power_supply", "opendir", strerror (errno));
return NULL;
}
struct dirent *entry;
struct strv batteries = strv_make ();
while ((entry = readdir (power_supply)))
{
const char *device_name = entry->d_name;
if (device_name[0] == '.')
continue;
int dir = openat (dirfd (power_supply), device_name, O_RDONLY);
if (dir < 0)
{
print_error ("%s: %s: %s", device_name, "openat", strerror (errno));
continue;
}
struct error *error = NULL;
char *status = try_power_supply (dir, &error);
close (dir);
if (status)
strv_append_owned (&batteries, status);
if (error)
{
print_error ("%s: %s", device_name, error->message);
error_free (error);
}
}
closedir (power_supply);
char *result = batteries.len ? strv_join (&batteries, " ") : NULL;
strv_free (&batteries);
return result;
}
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
static char *
make_time_status (const char *fmt)
{
char buf[129] = "";
time_t now = time (NULL);
struct tm *local = localtime (&now);
if (local == NULL)
exit_fatal ("%s: %s", "localtime", strerror (errno));
if (!strftime (buf, sizeof buf, fmt, local))
exit_fatal ("strftime == 0");
return xstrdup (buf);
}
#define VOLUME_PERCENT(x) (((x) * 100 + PA_VOLUME_NORM / 2) / PA_VOLUME_NORM)
static char *
make_volume_status (struct app_context *ctx)
{
if (!ctx->sink_volume.channels)
return xstrdup ("");
struct str s = str_make ();
if (ctx->sink_muted)
str_append (&s, "Muted ");
str_append_printf (&s,
"%u%%", VOLUME_PERCENT (ctx->sink_volume.values[0]));
if (!pa_cvolume_channels_equal_to
(&ctx->sink_volume, ctx->sink_volume.values[0]))
{
for (size_t i = 1; i < ctx->sink_volume.channels; i++)
str_append_printf (&s, " / %u%%",
VOLUME_PERCENT (ctx->sink_volume.values[i]));
}
return str_steal (&s);
}
static char *
make_noise_status (struct app_context *ctx)
{
int diff = difftime (ctx->noise_end_time, time (NULL));
return xstrdup_printf ("\x01" "Playing noise" "\x01 (%d:%02d)",
diff / 3600, diff / 60 % 60);
}
static void
refresh_status (struct app_context *ctx)
{
if (ctx->prefix) ctx->backend->add (ctx->backend, ctx->prefix);
if (ctx->mpd_status) ctx->backend->add (ctx->backend, ctx->mpd_status);
else if (ctx->mpd_song) ctx->backend->add (ctx->backend, ctx->mpd_song);
if (ctx->noise_end_time)
{
char *noise = make_noise_status (ctx);
ctx->backend->add (ctx->backend, noise);
free (noise);
}
if (ctx->failed) ctx->backend->add (ctx->backend, "PA failure");
else
{
char *volumes = make_volume_status (ctx);
ctx->backend->add (ctx->backend, volumes);
free (volumes);
}
char *battery = make_battery_status ();
if (battery) ctx->backend->add (ctx->backend, battery);
free (battery);
if (ctx->nut_status) ctx->backend->add (ctx->backend, ctx->nut_status);
if (ctx->layout) ctx->backend->add (ctx->backend, ctx->layout);
if (ctx->insomnia_info)
ctx->backend->add (ctx->backend, ctx->insomnia_info);
for (size_t i = 0; i < ctx->command_current.len; i++)
ctx->backend->add (ctx->backend, ctx->command_current.vector[i]);
char *times = make_time_status ("Week %V, %a %d %b %Y %H:%M %Z");
ctx->backend->add (ctx->backend, times);
free (times);
ctx->backend->flush (ctx->backend);
}
static void
on_time_changed (void *user_data)
{
struct app_context *ctx = user_data;
refresh_status (ctx);
const time_t now = time (NULL);
const time_t next = (now / 60 + 1) * 60;
poller_timer_set (&ctx->time_changed, (next - now) * 1000);
}
static void
on_refresh_rest (void *user_data)
{
struct app_context *ctx = user_data;
// We cannot use poll() on most sysfs entries, including battery charge
refresh_status (ctx);
poller_timer_set (&ctx->refresh_rest, 5000);
}
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
static void
suspend (struct app_context *ctx)
{
DBusMessage *msg = dbus_message_new_method_call
("org.freedesktop.login1", "/org/freedesktop/login1",
"org.freedesktop.login1.Manager", "Suspend");
hard_assert (msg != NULL);
dbus_bool_t interactive = false;
hard_assert (dbus_message_append_args (msg,
DBUS_TYPE_BOOLEAN, &interactive,
DBUS_TYPE_INVALID));
DBusError err = DBUS_ERROR_INIT;
DBusMessage *reply = dbus_connection_send_with_reply_and_block
(ctx->system_bus, msg, 1000, &err);
dbus_message_unref (msg);
if (!reply)
{
print_error ("%s: %s", "suspend", err.message);
dbus_error_free (&err);
}
else
dbus_message_unref (reply);
}
static void
set_idle_alarm (struct app_context *ctx,
XSyncAlarm *alarm, XSyncTestType test, XSyncValue value)
{
XSyncAlarmAttributes attr;
attr.trigger.counter = ctx->idle_counter;
attr.trigger.test_type = test;
attr.trigger.wait_value = value;
XSyncIntToValue (&attr.delta, 0);
long flags = XSyncCACounter | XSyncCATestType | XSyncCAValue | XSyncCADelta;
if (*alarm)
XSyncChangeAlarm (ctx->dpy, *alarm, flags, &attr);
else
*alarm = XSyncCreateAlarm (ctx->dpy, flags, &attr);
}
static void
on_x_alarm_notify (struct app_context *ctx, XSyncAlarmNotifyEvent *ev)
{
if (ev->alarm == ctx->idle_alarm_inactive)
{
// Our own lock doesn't matter, we have to check it ourselves
if (ctx->system_bus && ctx->insomnia_fd == -1)
suspend (ctx);
XSyncValue one, minus_one;
XSyncIntToValue (&one, 1);
Bool overflow;
XSyncValueSubtract (&minus_one, ev->counter_value, one, &overflow);
// Set an alarm for IDLETIME <= current_idletime - 1
set_idle_alarm (ctx, &ctx->idle_alarm_active,
XSyncNegativeComparison, minus_one);
}
else if (ev->alarm == ctx->idle_alarm_active)
// XXX: even though it doesn't seem to run during the time the system
// is suspended, I haven't found any place where it is specified
set_idle_alarm (ctx, &ctx->idle_alarm_inactive,
XSyncPositiveComparison, ctx->idle_timeout);
}
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
static void
command_queue_start (struct app_context *ctx)
{
poller_timer_set (&ctx->command_start, 30 * 1000);
}
static void
on_command_ready (const struct pollfd *pfd, void *user_data)
{
struct app_context *ctx = user_data;
struct str *buf = &ctx->command_buffer;
enum socket_io_result result = socket_io_try_read (pfd->fd, buf);
bool data_have_changed = false;
size_t end = 0;
for (size_t i = 0; i + 1 < buf->len; i++)
{
if (buf->str[i] != '\n' || buf->str[i + 1] != '\n')
continue;
buf->str[i + 1] = '\0';
strv_reset (&ctx->command_current);
cstr_split (buf->str + end, "\n", true, &ctx->command_current);
end = i + 2;
data_have_changed = true;
}
str_remove_slice (buf, 0, end);
if (result != SOCKET_IO_OK)
{
// The pipe may have been closed independently
if (ctx->command_pid != -1)
(void) kill (ctx->command_pid, SIGTERM);
poller_fd_reset (&ctx->command_event);
xclose (ctx->command_fd);
ctx->command_fd = -1;
ctx->command_pid = -1;
// Make it obvious that something's not right here
strv_reset (&ctx->command_current);
data_have_changed = true;
print_error ("external command failed");
command_queue_start (ctx);
}
if (data_have_changed)
refresh_status (ctx);
}
static void
on_command_start (void *user_data)
{
struct app_context *ctx = user_data;
char *command = str_map_find (&ctx->config, "command");
if (!command)
return;
int output_pipe[2];
if (pipe (output_pipe))
{
print_error ("%s: %s", "pipe", strerror (errno));
command_queue_start (ctx);
return;
}
posix_spawn_file_actions_t actions;
posix_spawn_file_actions_init (&actions);
posix_spawn_file_actions_adddup2
(&actions, output_pipe[PIPE_WRITE], STDOUT_FILENO);
posix_spawn_file_actions_addclose (&actions, output_pipe[PIPE_READ]);
posix_spawn_file_actions_addclose (&actions, output_pipe[PIPE_WRITE]);
pid_t pid = -1;
char *argv[] = { "sh", "-c", command, NULL };
int result = posix_spawnp (&pid, argv[0], &actions, NULL, argv, environ);
posix_spawn_file_actions_destroy (&actions);
set_blocking (output_pipe[PIPE_READ], false);
set_cloexec (output_pipe[PIPE_READ]);
xclose (output_pipe[PIPE_WRITE]);
if (result)
{
xclose (output_pipe[PIPE_READ]);
print_error ("%s: %s", "posix_spawnp", strerror (result));
command_queue_start (ctx);
return;
}
ctx->command_pid = pid;
str_reset (&ctx->command_buffer);
ctx->command_event = poller_fd_make (&ctx->poller,
(ctx->command_fd = output_pipe[PIPE_READ]));
ctx->command_event.dispatcher = on_command_ready;
ctx->command_event.user_data = ctx;
poller_fd_set (&ctx->command_event, POLLIN);
}
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
// Sometimes it's not that easy and there can be repeating entries
static void
mpd_vector_to_map (const struct strv *data, struct str_map *map)
{
*map = str_map_make (free);
map->key_xfrm = tolower_ascii_strxfrm;
char *key, *value;
for (size_t i = 0; i < data->len; i++)
{
if ((key = mpd_client_parse_kv (data->vector[i], &value)))
str_map_set (map, key, xstrdup (value));
else
print_debug ("%s: %s", "erroneous MPD output", data->vector[i]);
}
}
static void
mpd_on_info_response (const struct mpd_response *response,
const struct strv *data, void *user_data)
{
if (!response->success)
{
print_debug ("%s: %s",
"retrieving MPD info failed", response->message_text);
return;
}
struct app_context *ctx = user_data;
struct str_map map;
mpd_vector_to_map (data, &map);
cstr_set (&ctx->mpd_status, NULL);
struct str s = str_make ();
const char *value;
if ((value = str_map_find (&map, "state")))
{
// Unicode approximates since in proportional fonts ASCII looks ugly
// and I don't want to depend on a particular font with player chars
if (!strcmp (value, "stop"))
ctx->mpd_status = xstrdup ("MPD stopped");
else if (!strcmp (value, "pause"))
str_append (&s, "▯▯ " /* "|| " */);
else
str_append (&s, "â–· " /* "|> " */);
}
if ((value = str_map_find (&map, "title"))
|| (value = str_map_find (&map, "name"))
|| (value = str_map_find (&map, "file")))
str_append_printf (&s, "\001%s\001", value);
if ((value = str_map_find (&map, "artist")))
str_append_printf (&s, " by \001%s\001", value);
if ((value = str_map_find (&map, "album")))
str_append_printf (&s, " from \001%s\001", value);
cstr_set (&ctx->mpd_song, str_steal (&s));
refresh_status (ctx);
str_map_free (&map);
}
static void
mpd_request_info (struct app_context *ctx)
{
struct mpd_client *c = &ctx->mpd_client;
mpd_client_list_begin (c);
mpd_client_send_command (c, "currentsong", NULL);
mpd_client_send_command (c, "status", NULL);
mpd_client_list_end (c);
mpd_client_add_task (c, mpd_on_info_response, ctx);
mpd_client_idle (c, 0);
}
static void
mpd_on_events (unsigned subsystems, void *user_data)
{
struct app_context *ctx = user_data;
struct mpd_client *c = &ctx->mpd_client;
if (subsystems & (MPD_SUBSYSTEM_PLAYER | MPD_SUBSYSTEM_PLAYLIST))
mpd_request_info (ctx);
else
mpd_client_idle (c, 0);
}
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
static void
mpd_queue_reconnect (struct app_context *ctx)
{
poller_timer_set (&ctx->mpd_reconnect, 30 * 1000);
}
static void
mpd_on_password_response (const struct mpd_response *response,
const struct strv *data, void *user_data)
{
(void) data;
struct app_context *ctx = user_data;
struct mpd_client *c = &ctx->mpd_client;
if (response->success)
mpd_request_info (ctx);
else
{
print_error ("%s: %s",
"couldn't authenticate to MPD", response->message_text);
mpd_client_send_command (c, "close", NULL);
}
}
static void
mpd_on_connected (void *user_data)
{
struct app_context *ctx = user_data;
struct mpd_client *c = &ctx->mpd_client;
const char *password = str_map_find (&ctx->config, "mpd_password");
if (password)
{
mpd_client_send_command (c, "password", password, NULL);
mpd_client_add_task (c, mpd_on_password_response, ctx);
}
else
mpd_request_info (ctx);
}
static void
mpd_on_failure (void *user_data)
{
// This is also triggered both by a failed connect and a clean disconnect
struct app_context *ctx = user_data;
print_error ("connection to MPD failed");
mpd_queue_reconnect (ctx);
}
static void
mpd_on_io_hook (void *user_data, bool outgoing, const char *line)
{
(void) user_data;
if (outgoing)
print_debug ("MPD << %s", line);
else
print_debug ("MPD >> %s", line);
}
static void
on_mpd_reconnect (void *user_data)
{
// FIXME: the user should be able to disable MPD
struct app_context *ctx = user_data;
struct mpd_client *c = &ctx->mpd_client;
c->user_data = ctx;
c->on_failure = mpd_on_failure;
c->on_connected = mpd_on_connected;
c->on_event = mpd_on_events;
c->on_io_hook = mpd_on_io_hook;
struct error *e = NULL;
if (!mpd_client_connect (&ctx->mpd_client,
str_map_find (&ctx->config, "mpd_address"),
str_map_find (&ctx->config, "mpd_service"), &e))
{
print_error ("%s: %s", "cannot connect to MPD", e->message);
error_free (e);
mpd_queue_reconnect (ctx);
}
}
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
static bool
nut_common_handler (const struct nut_response *response)
{
if (response->success)
return true;
print_error ("%s: %s", "retrieving NUT info failed", response->message);
return false;
}
static void
nut_translate_status (const char *status, struct strv *out)
{
// https://github.com/networkupstools/nut/blob/master/clients/status.h
if (!strcmp (status, "OL")) strv_append (out, "on-line");
if (!strcmp (status, "OB")) strv_append (out, "on battery");
if (!strcmp (status, "LB")) strv_append (out, "low battery");
if (!strcmp (status, "RB")) strv_append (out, "replace battery");
if (!strcmp (status, "CHRG")) strv_append (out, "charging");
if (!strcmp (status, "DISCHRG")) strv_append (out, "discharging");
if (!strcmp (status, "OVER")) strv_append (out, "overload");
if (!strcmp (status, "OFF")) strv_append (out, "off");
if (!strcmp (status, "TRIM")) strv_append (out, "voltage trim");
if (!strcmp (status, "BOOST")) strv_append (out, "voltage boost");
if (!strcmp (status, "BYPASS")) strv_append (out, "bypass");
}
static char *
interval_string (unsigned long seconds)
{
unsigned long hours = seconds / 3600; seconds %= 3600;
unsigned long mins = seconds / 60; seconds %= 60;
return xstrdup_printf ("%lu:%02lu:%02lu", hours, mins, seconds);
}
static void
nut_process_ups (struct app_context *ctx, struct strv *ups_list,
const char *ups_name, struct str_map *dict)
{
// Not currently interested in this kind of information;
// maybe if someone had more than one UPS installed
(void) ups_name;
// http://www.networkupstools.org/docs/developer-guide.chunked/apas01.html
const char *status = str_map_find (dict, "ups.status");
const char *charge = str_map_find (dict, "battery.charge");
const char *runtime = str_map_find (dict, "battery.runtime");
const char *load = str_map_find (dict, "ups.load");
if (!soft_assert (status && charge && runtime))
return;
unsigned long runtime_sec;
if (!soft_assert (xstrtoul (&runtime_sec, runtime, 10)))
return;
struct strv items = strv_make ();
bool running_on_batteries = false;
struct strv v = strv_make ();
cstr_split (status, " ", true, &v);
for (size_t i = 0; i < v.len; i++)
{
const char *status = v.vector[i];
nut_translate_status (status, &items);
if (!strcmp (status, "OB"))
running_on_batteries = true;
}
strv_free (&v);
if (running_on_batteries || strcmp (charge, "100"))
strv_append_owned (&items, xstrdup_printf ("%s%%", charge));
if (running_on_batteries)
strv_append_owned (&items, interval_string (runtime_sec));
// Only show load if it's higher than the threshold so as to not distract
const char *threshold = str_map_find (&ctx->config, "nut_load_thld");
unsigned long load_n, threshold_n;
if (load
&& xstrtoul (&load_n, load, 10)
&& xstrtoul (&threshold_n, threshold, 10)
&& load_n >= threshold_n)
{
struct str item = str_make ();
str_append_printf (&item, "load %s%%", load);
const char *power = str_map_find (dict, "ups.realpower.nominal");
// Override if NUT cannot tell it correctly for whatever reason
if (!power) power = str_map_find (&ctx->config, "nut_load_power");
// Approximation of how much electricity the perpihery actually uses
unsigned long power_n;
if (power && xstrtoul (&power_n, power, 10))
str_append_printf (&item, " (~%luW)", power_n * load_n / 100);
strv_append_owned (&items, str_steal (&item));
}
struct str result = str_make ();
str_append (&result, "UPS: ");
for (size_t i = 0; i < items.len; i++)
{
if (i) str_append (&result, "; ");
str_append (&result, items.vector[i]);
}
strv_free (&items);
strv_append_owned (ups_list, str_steal (&result));
}
static void
nut_on_logout_response (const struct nut_response *response, void *user_data)
{
if (!nut_common_handler (response))
return;
struct app_context *ctx = user_data;
struct strv ups_list = strv_make ();
struct str_map_iter iter = str_map_iter_make (&ctx->nut_ups_info);
struct str_map *dict;
while ((dict = str_map_iter_next (&iter)))
nut_process_ups (ctx, &ups_list, iter.link->key, dict);
cstr_set (&ctx->nut_status, NULL);
if (ups_list.len)
{
struct str status = str_make ();
str_append (&status, ups_list.vector[0]);
for (size_t i = 1; i < ups_list.len; i++)
str_append_printf (&status, " %s", ups_list.vector[0]);
ctx->nut_status = str_steal (&status);
}
ctx->nut_success = true;
strv_free (&ups_list);
refresh_status (ctx);
}
static void
nut_store_var (struct app_context *ctx,
const char *ups_name, const char *key, const char *value)
{
struct str_map *map;
if (!(map = str_map_find (&ctx->nut_ups_info, ups_name)))
{
map = xmalloc (sizeof *map);
*map = str_map_make (free);
str_map_set (&ctx->nut_ups_info, ups_name, map);
}
str_map_set (map, key, xstrdup (value));
}
static void
nut_on_var_response (const struct nut_response *response, void *user_data)
{
if (!nut_common_handler (response))
return;
struct app_context *ctx = user_data;
LIST_FOR_EACH (struct nut_line, iter, response->data)
{
const struct strv *fields = &iter->fields;
if (!soft_assert (fields->len >= 4
&& !strcmp (fields->vector[0], "VAR")))
continue;
nut_store_var (ctx, fields->vector[1],
fields->vector[2], fields->vector[3]);
}
}
static void
nut_on_list_ups_response (const struct nut_response *response, void *user_data)
{
if (!nut_common_handler (response))
return;
struct app_context *ctx = user_data;
struct nut_client *c = &ctx->nut_client;
// Then we list all their properties and terminate the connection
LIST_FOR_EACH (struct nut_line, iter, response->data)
{
const struct strv *fields = &iter->fields;
if (!soft_assert (fields->len >= 2
&& !strcmp (fields->vector[0], "UPS")))
continue;
nut_client_send_command (c, "LIST", "VAR", fields->vector[1], NULL);
nut_client_add_task (c, nut_on_var_response, ctx);
}
nut_client_send_command (c, "LOGOUT", NULL);
nut_client_add_task (c, nut_on_logout_response, ctx);
}
static void
nut_on_connected (void *user_data)
{
struct app_context *ctx = user_data;
struct nut_client *c = &ctx->nut_client;
// First we list all available UPS devices
nut_client_send_command (c, "LIST", "UPS", NULL);
nut_client_add_task (c, nut_on_list_ups_response, ctx);
}
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
static void
nut_indicate_failure (struct app_context *ctx)
{
cstr_set (&ctx->nut_status, xstrdup ("NUT failure"));
refresh_status (ctx);
}
static void
nut_on_failure (void *user_data)
{
struct app_context *ctx = user_data;
// This is also triggered both by a failed connect and a clean disconnect
if (!ctx->nut_success)
{
print_error ("connection to NUT failed");
nut_indicate_failure (ctx);
}
}
static void
on_nut_reconnect (void *user_data)
{
struct app_context *ctx = user_data;
bool want_nut = false;
if (!set_boolean_if_valid (&want_nut,
str_map_find (&ctx->config, "nut_enabled")))
print_error ("invalid configuration value for `%s'", "nut_enabled");
if (!want_nut)
return;
struct nut_client *c = &ctx->nut_client;
c->user_data = ctx;
c->on_failure = nut_on_failure;
c->on_connected = nut_on_connected;
// So that we don't have to maintain a separate timeout timer,
// we keep a simple periodic reconnect timer
if (c->state != NUT_DISCONNECTED)
{
print_error ("failed to retrieve NUT status within the interval");
nut_indicate_failure (ctx);
nut_client_reset (c);
}
str_map_clear (&ctx->nut_ups_info);
nut_client_connect (&ctx->nut_client, "localhost", "3493");
ctx->nut_success = false;
poller_timer_set (&ctx->nut_reconnect, 10 * 1000);
}
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
static inline float
noise_next_brownian (float last)
{
// Leaky integrators have a side effect on the signal, making noise white
// on the lower end of the spectrum, which can be heard as reduced rumbling
while (1)
{
// 0.9375 is the guaranteed to be safe value, not very pleasant
float f = last * 0.99 + ((double) rand () / RAND_MAX - 0.5) / 8;
if (f >= -1 && f <= 1)
return f;
}
}
static void
noise_generate_stereo (struct app_context *ctx, int16_t *data, size_t n)
{
float brown_l = ctx->noise_state[0];
float brown_r = ctx->noise_state[1];
for (size_t i = 0; i < n / 2; i++)
{
// We do not want to use a linear transition, and a decreasing geometric
// sequence would have a limit in infinity, so use powers of normalized
// time deltas--in particular 2 up to 6 are said to work
float gain = 1;
if (ctx->noise_fadeout_samples)
{
float remaining = (float) (ctx->noise_fadeout_samples
- ctx->noise_fadeout_iterator++) / ctx->noise_fadeout_samples;
if (remaining <= 0)
gain = 0;
else
gain = remaining * remaining;
}
data[i * 2 + 0] =
(brown_l = noise_next_brownian (brown_l)) * gain * INT16_MAX;
data[i * 2 + 1] =
(brown_r = noise_next_brownian (brown_r)) * gain * INT16_MAX;
}
ctx->noise_state[0] = brown_l;
ctx->noise_state[1] = brown_r;
}
static void
noise_abort (struct app_context *ctx)
{
ctx->noise_end_time = 0;
poller_timer_reset (&ctx->noise_timer);
if (ctx->noise_stream)
{
(void) pa_stream_disconnect (ctx->noise_stream);
pa_stream_unref (ctx->noise_stream);
ctx->noise_stream = NULL;
}
}
static void
on_noise_writeable (pa_stream *stream, size_t nbytes, void *userdata)
{
struct app_context *ctx = userdata;
int16_t data[nbytes / 2];
noise_generate_stereo (ctx, data, N_ELEMENTS (data));
int err;
if ((err = pa_stream_write (stream,
data, sizeof data, NULL, 0, PA_SEEK_RELATIVE)))
{
print_error ("noise playback failed: %s", pa_strerror (err));
noise_abort (ctx);
}
}
static const pa_sample_spec noise_default_spec =
{
.channels = 2,
.format = BYTE_ORDER == LITTLE_ENDIAN ? PA_SAMPLE_S16LE : PA_SAMPLE_S16BE,
.rate = 48000,
};
static bool
noise_start (struct app_context *ctx)
{
if (!ctx->context)
{
print_error ("not playing noise, not connected to PulseAudio");
return false;
}
// Avoid unnecessary, and fairly CPU-intensive resampling
pa_sample_spec spec = noise_default_spec;
if (ctx->sink_sample_spec.rate == 44100)
spec.rate = ctx->sink_sample_spec.rate;
ctx->noise_stream =
pa_stream_new (ctx->context, PROGRAM_NAME "/noise", &spec, NULL);
pa_stream_set_write_callback (ctx->noise_stream, on_noise_writeable, ctx);
int err;
if ((err = pa_stream_connect_playback (ctx->noise_stream,
NULL, NULL, 0, NULL, NULL)))
{
print_error ("failed to connect noise playback stream: %s",
pa_strerror (err));
noise_abort (ctx);
return false;
}
time (&ctx->noise_end_time);
ctx->noise_state[0] = ctx->noise_state[1] = 0;
ctx->noise_fadeout_samples = 0;
ctx->noise_fadeout_iterator = 0;
return true;
}
static void
on_noise_timer (void *user_data)
{
struct app_context *ctx = user_data;
int diff = difftime (ctx->noise_end_time, time (NULL));
if (diff <= 0)
noise_abort (ctx);
else
{
poller_timer_set (&ctx->noise_timer, (diff % 60 + 1) * 1000);
// XXX: this is inaccurate, since we don't take into account buffering,
// however it shouldn't pose a major issue
if (diff <= 60 && !ctx->noise_fadeout_samples)
ctx->noise_fadeout_samples =
diff * pa_stream_get_sample_spec (ctx->noise_stream)->rate;
}
refresh_status (ctx);
}
static void
on_noise_adjust (struct app_context *ctx, int arg)
{
ctx->noise_fadeout_samples = 0;
ctx->noise_fadeout_iterator = 0;
if (!ctx->noise_end_time && (arg < 0 || !noise_start (ctx)))
return;
// The granularity of noise playback is whole minutes
ctx->noise_end_time += arg * 60;
on_noise_timer (ctx);
}
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
#define DEFAULT_SOURCE "@DEFAULT_SOURCE@"
#define DEFAULT_SINK "@DEFAULT_SINK@"
static void
on_sink_info (pa_context *context, const pa_sink_info *info, int eol,
void *userdata)
{
(void) context;
if (info && !eol)
{
struct app_context *ctx = userdata;
ctx->sink_sample_spec = info->sample_spec;
ctx->sink_volume = info->volume;
ctx->sink_muted = !!info->mute;
strv_reset (&ctx->sink_ports);
cstr_set (&ctx->sink_port_active, NULL);
if (info->ports)
for (struct pa_sink_port_info **iter = info->ports; *iter; iter++)
strv_append (&ctx->sink_ports, (*iter)->name);
if (info->active_port)
ctx->sink_port_active = xstrdup (info->active_port->name);
refresh_status (ctx);
}
}
static void
on_source_info (pa_context *context, const pa_source_info *info, int eol,
void *userdata)
{
(void) context;
if (info && !eol)
{
struct app_context *ctx = userdata;
ctx->source_muted = !!info->mute;
}
}
static void
update_volume (struct app_context *ctx)
{
pa_operation_unref (pa_context_get_sink_info_by_name
(ctx->context, DEFAULT_SINK, on_sink_info, ctx));
pa_operation_unref (pa_context_get_source_info_by_name
(ctx->context, DEFAULT_SOURCE, on_source_info, ctx));
}
static void
on_event (pa_context *context, pa_subscription_event_type_t event,
uint32_t index, void *userdata)
{
(void) context;
(void) index;
struct app_context *ctx = userdata;
if ((event & PA_SUBSCRIPTION_EVENT_TYPE_MASK)
== PA_SUBSCRIPTION_EVENT_CHANGE)
update_volume (ctx);
}
static void
on_subscribe_finish (pa_context *context, int success, void *userdata)
{
(void) context;
struct app_context *ctx = userdata;
if (!success)
{
ctx->failed = true;
refresh_status (ctx);
}
}
static void
on_context_state_change (pa_context *context, void *userdata)
{
struct app_context *ctx = userdata;
switch (pa_context_get_state (context))
{
case PA_CONTEXT_FAILED:
case PA_CONTEXT_TERMINATED:
// The stream depends on the context, and would keep its object alive
noise_abort (ctx);
ctx->failed = true;
refresh_status (ctx);
pa_context_unref (context);
ctx->context = NULL;
// Retry after an arbitrary delay of 5 seconds
poller_timer_set (&ctx->make_context, 5000);
return;
case PA_CONTEXT_READY:
ctx->failed = false;
refresh_status (ctx);
pa_context_set_subscribe_callback (context, on_event, userdata);
pa_operation_unref (pa_context_subscribe (context,
PA_SUBSCRIPTION_MASK_SINK | PA_SUBSCRIPTION_MASK_SOURCE,
on_subscribe_finish, userdata));
update_volume (ctx);
default:
return;
}
}
static void
on_make_context (void *user_data)
{
struct app_context *ctx = user_data;
ctx->context = pa_context_new (ctx->api, PROGRAM_NAME);
pa_context_set_state_callback (ctx->context, on_context_state_change, ctx);
pa_context_connect (ctx->context, NULL, PA_CONTEXT_NOFLAGS, NULL);
}
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
static void
spawn (char *argv[])
{
posix_spawn_file_actions_t actions;
posix_spawn_file_actions_init (&actions);
// That would mess up our JSON
posix_spawn_file_actions_addopen
(&actions, STDOUT_FILENO, "/dev/null", O_WRONLY, 0);
posix_spawnp (NULL, argv[0], &actions, NULL, argv, environ);
posix_spawn_file_actions_destroy (&actions);
}
#define MPD_SIMPLE(name, ...) \
static void \
on_mpd_ ## name (struct app_context *ctx, int arg) \
{ \
(void) arg; \
struct mpd_client *c = &ctx->mpd_client; \
if (c->state != MPD_CONNECTED) \
return; \
mpd_client_send_command (c, __VA_ARGS__); \
mpd_client_add_task (c, NULL, NULL); \
mpd_client_idle (c, 0); \
}
// XXX: pause without argument is deprecated, we can watch play state
// if we want to have the toggle pause/play functionality
MPD_SIMPLE (play, "pause", NULL)
MPD_SIMPLE (stop, "stop", NULL)
MPD_SIMPLE (prev, "previous", NULL)
MPD_SIMPLE (next, "next", NULL)
MPD_SIMPLE (forward, "seekcur", "+10", NULL)
MPD_SIMPLE (backward, "seekcur", "-10", NULL)
static void
on_volume_finish (pa_context *context, int success, void *userdata)
{
(void) context;
(void) success;
(void) userdata;
// Just like... whatever, man
}
static void
on_volume_mic_mute (struct app_context *ctx, int arg)
{
(void) arg;
if (!ctx->context)
return;
pa_operation_unref (pa_context_set_source_mute_by_name (ctx->context,
DEFAULT_SOURCE, !ctx->source_muted, on_volume_finish, ctx));
}
static void
on_volume_switch (struct app_context *ctx, int arg)
{
(void) arg;
if (!ctx->context || !ctx->sink_port_active || !ctx->sink_ports.len)
return;
size_t current = 0;
for (size_t i = 0; i < ctx->sink_ports.len; i++)
if (!strcmp (ctx->sink_port_active, ctx->sink_ports.vector[i]))
current = i;
pa_operation_unref (pa_context_set_sink_port_by_name (ctx->context,
DEFAULT_SINK,
ctx->sink_ports.vector[(current + 1) % ctx->sink_ports.len],
on_volume_finish, ctx));
}
static void
on_volume_mute (struct app_context *ctx, int arg)
{
(void) arg;
if (!ctx->context)
return;
pa_operation_unref (pa_context_set_sink_mute_by_name (ctx->context,
DEFAULT_SINK, !ctx->sink_muted, on_volume_finish, ctx));
}
static void
on_volume_set (struct app_context *ctx, int arg)
{
if (!ctx->context)
return;
pa_cvolume volume = ctx->sink_volume;
if (arg > 0)
pa_cvolume_inc (&volume, (pa_volume_t) arg * PA_VOLUME_NORM / 100);
else
pa_cvolume_dec (&volume, (pa_volume_t) -arg * PA_VOLUME_NORM / 100);
pa_operation_unref (pa_context_set_sink_volume_by_name (ctx->context,
DEFAULT_SINK, &volume, on_volume_finish, ctx));
}
static void
on_lock (struct app_context *ctx, int arg)
{
(void) ctx;
(void) arg;
// One of these will work
char *argv_gdm[] = { "gdm-switch-user", NULL };
spawn (argv_gdm);
char *argv_ldm[] = { "dm-tool", "lock", NULL };
spawn (argv_ldm);
}
static void
on_input_switch (struct app_context *ctx, int arg)
{
(void) ctx;
char *values[] = { "vga", "dvi", "hdmi", "dp" },
*numbers[] = { "1", "2" };
char *argv[] = { "input-switch",
values[arg & 0xf], numbers[arg >> 4], NULL };
spawn (argv);
}
static void
on_brightness (struct app_context *ctx, int arg)
{
(void) ctx;
char *value = xstrdup_printf ("%d", arg);
char *argv[] = { "brightness", value, NULL };
spawn (argv);
free (value);
}
static void
on_standby (struct app_context *ctx, int arg)
{
(void) ctx;
(void) arg;
// We need to wait a little while until user releases the key
spawn ((char *[]) { "sh", "-c", "sleep 1; xset dpms force standby", NULL });
}
static void
go_insomniac (struct app_context *ctx)
{
static const char *what = "sleep:idle";
static const char *who = PROGRAM_NAME;
static const char *why = "";
static const char *mode = "block";
DBusMessage *msg = dbus_message_new_method_call
("org.freedesktop.login1", "/org/freedesktop/login1",
"org.freedesktop.login1.Manager", "Inhibit");
hard_assert (msg != NULL);
hard_assert (dbus_message_append_args (msg,
DBUS_TYPE_STRING, &what,
DBUS_TYPE_STRING, &who,
DBUS_TYPE_STRING, &why,
DBUS_TYPE_STRING, &mode,
DBUS_TYPE_INVALID));
DBusError err = DBUS_ERROR_INIT;
DBusMessage *reply = dbus_connection_send_with_reply_and_block
(ctx->system_bus, msg, 1000, &err);
dbus_message_unref (msg);
if (!reply)
{
ctx->insomnia_info = xstrdup_printf ("%s: %s", "Insomnia", err.message);
dbus_error_free (&err);
}
else if (!dbus_message_get_args (reply, &err,
DBUS_TYPE_UNIX_FD, &ctx->insomnia_fd, DBUS_TYPE_INVALID))
{
dbus_message_unref (reply);
ctx->insomnia_info = xstrdup_printf ("%s: %s", "Insomnia", err.message);
dbus_error_free (&err);
}
else
{
dbus_message_unref (reply);
ctx->insomnia_info = xstrdup ("Insomniac");
set_cloexec (ctx->insomnia_fd);
}
}
static void
on_insomnia (struct app_context *ctx, int arg)
{
(void) arg;
cstr_set (&ctx->insomnia_info, NULL);
// Get rid of the lock if we hold one, establish it otherwise
if (ctx->insomnia_fd != -1)
{
xclose (ctx->insomnia_fd);
ctx->insomnia_fd = -1;
}
else if (ctx->system_bus)
go_insomniac (ctx);
refresh_status (ctx);
}
static void
on_lock_group (struct app_context *ctx, int arg)
{
XkbLockGroup (ctx->dpy, XkbUseCoreKbd, arg);
}
struct
{
unsigned mod;
KeySym keysym;
void (*handler) (struct app_context *ctx, int arg);
int arg;
}
g_keys[] =
{
// This key should be labeled L on normal Qwert[yz] layouts
{ Mod4Mask, XK_n, on_lock, 0 },
// xmodmap | grep -e Alt_R -e Meta_R -e ISO_Level3_Shift -e Mode_switch
// can be used to figure out which modifier is AltGr
// MPD
{ Mod4Mask, XK_Up, on_mpd_play, 0 },
{ Mod4Mask, XK_Down, on_mpd_stop, 0 },
{ Mod4Mask, XK_Left, on_mpd_prev, 0 },
{ Mod4Mask, XK_Right, on_mpd_next, 0 },
{ Mod4Mask | ShiftMask, XK_Left, on_mpd_backward, 0 },
{ Mod4Mask | ShiftMask, XK_Right, on_mpd_forward, 0 },
{ 0, XF86XK_AudioPlay, on_mpd_play, 0 },
{ 0, XF86XK_AudioPrev, on_mpd_prev, 0 },
{ 0, XF86XK_AudioNext, on_mpd_next, 0 },
// Keyboard groups
{ Mod4Mask, XK_F1, on_lock_group, 0 },
{ Mod4Mask, XK_F2, on_lock_group, 1 },
{ Mod4Mask, XK_F3, on_lock_group, 2 },
{ Mod4Mask, XK_F4, on_lock_group, 3 },
#define CSMask (ControlMask | ShiftMask)
// Display input sources
{ Mod4Mask | ControlMask, XK_F1, on_input_switch, 0 },
{ Mod4Mask | CSMask, XK_F1, on_input_switch, 16 | 0 },
{ Mod4Mask | ControlMask, XK_F2, on_input_switch, 1 },
{ Mod4Mask | CSMask, XK_F2, on_input_switch, 16 | 1 },
{ Mod4Mask | ControlMask, XK_F3, on_input_switch, 2 },
{ Mod4Mask | CSMask, XK_F3, on_input_switch, 16 | 2 },
{ Mod4Mask | ControlMask, XK_F4, on_input_switch, 3 },
{ Mod4Mask | CSMask, XK_F4, on_input_switch, 16 | 3 },
// Brightness
{ Mod4Mask, XK_Home, on_brightness, 10 },
{ Mod4Mask, XK_End, on_brightness, -10 },
{ 0, XF86XK_MonBrightnessUp, on_brightness, 10 },
{ 0, XF86XK_MonBrightnessDown, on_brightness, -10 },
{ Mod4Mask, XK_F5, on_standby, 0 },
{ Mod4Mask | ShiftMask, XK_F5, on_insomnia, 0 },
{ Mod4Mask, XK_Pause, on_standby, 0 },
{ Mod4Mask | ShiftMask, XK_Pause, on_insomnia, 0 },
// Volume
{ Mod4Mask, XK_Insert, on_volume_switch, 0 },
{ Mod4Mask, XK_Delete, on_volume_mute, 0 },
{ Mod4Mask | ShiftMask, XK_Delete, on_volume_mic_mute, 0 },
{ Mod4Mask, XK_Page_Up, on_volume_set, 5 },
{ Mod4Mask | ShiftMask, XK_Page_Up, on_volume_set, 1 },
{ Mod4Mask, XK_Page_Down, on_volume_set, -5 },
{ Mod4Mask | ShiftMask, XK_Page_Down, on_volume_set, -1 },
{ 0, XF86XK_AudioRaiseVolume, on_volume_set, 5 },
{ ShiftMask, XF86XK_AudioRaiseVolume, on_volume_set, 1 },
{ 0, XF86XK_AudioLowerVolume, on_volume_set, -5 },
{ ShiftMask, XF86XK_AudioLowerVolume, on_volume_set, -1 },
{ 0, XF86XK_AudioMute, on_volume_mute, 0 },
{ 0, XF86XK_AudioMicMute, on_volume_mic_mute, 0 },
// Noise playback
{ ControlMask, XF86XK_AudioRaiseVolume, on_noise_adjust, 60 },
{ ControlMask, XF86XK_AudioLowerVolume, on_noise_adjust, -60 },
};
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
static void
on_x_keypress (struct app_context *ctx, XEvent *e)
{
XKeyEvent *ev = &e->xkey;
unsigned unconsumed_mods;
KeySym keysym;
if (!XkbLookupKeySym (ctx->dpy,
(KeyCode) ev->keycode, ev->state, &unconsumed_mods, &keysym))
return;
for (size_t i = 0; i < N_ELEMENTS (g_keys); i++)
if (g_keys[i].keysym == keysym
&& g_keys[i].mod == ev->state
&& g_keys[i].handler)
g_keys[i].handler (ctx, g_keys[i].arg);
}
static void
on_xkb_event (struct app_context *ctx, XkbEvent *ev)
{
int group;
if (ev->any.xkb_type == XkbStateNotify)
group = ev->state.group;
else
{
XkbStateRec rec;
XkbGetState (ctx->dpy, XkbUseCoreKbd, &rec);
group = rec.group;
}
XkbDescPtr desc = XkbAllocKeyboard ();
XkbGetNames (ctx->dpy, XkbGroupNamesMask, desc);
cstr_set (&ctx->layout, NULL);
if (group != 0)
{
char *layout = XGetAtomName (ctx->dpy, desc->names->groups[group]);
ctx->layout = xstrdup (layout);
XFree (layout);
}
XkbFreeKeyboard (desc, 0, True);
refresh_status (ctx);
}
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
static void
on_x_ready (const struct pollfd *pfd, void *user_data)
{
(void) pfd;
struct app_context *ctx = user_data;
XkbEvent ev;
while (XPending (ctx->dpy))
{
if (XNextEvent (ctx->dpy, &ev.core))
exit_fatal ("XNextEvent returned non-zero");
if (ev.type == KeyPress)
on_x_keypress (ctx, &ev.core);
else if (ev.type == ctx->xkb_base_event_code)
on_xkb_event (ctx, &ev);
else if (ctx->xsync_base_event_code
&& ev.type == ctx->xsync_base_event_code + XSyncAlarmNotify)
on_x_alarm_notify (ctx, (XSyncAlarmNotifyEvent *) &ev);
}
}
static void
init_xlib_events (struct app_context *ctx)
{
unsigned long n;
const char *sleep_timer = str_map_find (&ctx->config, "sleep_timer");
if (sleep_timer && ctx->idle_counter)
{
if (!xstrtoul (&n, sleep_timer, 10) || !n || n > INT_MAX / 1000)
exit_fatal ("invalid value for the sleep timer");
XSyncIntToValue (&ctx->idle_timeout, n * 1000);
set_idle_alarm (ctx, &ctx->idle_alarm_inactive,
XSyncPositiveComparison, ctx->idle_timeout);
}
unsigned ignored_locks =
LockMask | XkbKeysymToModifiers (ctx->dpy, XK_Num_Lock);
hard_assert (XkbSetIgnoreLockMods
(ctx->dpy, XkbUseCoreKbd, ignored_locks, ignored_locks, 0, 0));
KeyCode code;
Window root = DefaultRootWindow (ctx->dpy);
for (size_t i = 0; i < N_ELEMENTS (g_keys); i++)
if ((code = XKeysymToKeycode (ctx->dpy, g_keys[i].keysym)))
XGrabKey (ctx->dpy, code, g_keys[i].mod, root,
False /* ? */, GrabModeAsync, GrabModeAsync);
XSelectInput (ctx->dpy, root, KeyPressMask);
XSync (ctx->dpy, False);
ctx->x_event.dispatcher = on_x_ready;
ctx->x_event.user_data = ctx;
poller_fd_set (&ctx->x_event, POLLIN);
// XXX: XkbMapNotify -> XkbRefreshKeyboardMapping(), ...?
XkbSelectEventDetails (ctx->dpy, XkbUseCoreKbd, XkbNamesNotify,
XkbAllNamesMask, XkbGroupNamesMask);
XkbSelectEventDetails (ctx->dpy, XkbUseCoreKbd, XkbStateNotify,
XkbAllStateComponentsMask, XkbGroupStateMask);
}
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
static int g_signal_pipe[2]; ///< A pipe used to signal... signals
static struct poller_fd g_signal_event; ///< Signal pipe is readable
static void
on_sigchld (int sig)
{
(void) sig;
int original_errno = errno;
if (write (g_signal_pipe[PIPE_WRITE], "c", 1) == -1)
soft_assert (errno == EAGAIN);
errno = original_errno;
}
static void
on_signal_pipe_readable (const struct pollfd *pfd, struct app_context *ctx)
{
char dummy;
(void) read (pfd->fd, &dummy, 1);
pid_t zombie;
while ((zombie = waitpid (-1, NULL, WNOHANG)))
{
// We want to know when this happens so that we don't accidentally
// try to kill an unrelated process on cleanup
if (ctx->command_pid == zombie)
ctx->command_pid = -1;
if (zombie == -1 && errno == ECHILD)
return;
if (zombie == -1)
hard_assert (errno == EINTR);
}
}
static void
setup_signal_handlers (struct app_context *ctx)
{
if (pipe (g_signal_pipe) == -1)
exit_fatal ("%s: %s", "pipe", strerror (errno));
set_cloexec (g_signal_pipe[PIPE_READ]);
set_cloexec (g_signal_pipe[PIPE_WRITE]);
// So that the pipe cannot overflow; it would make write() block within
// the signal handler, which is something we really don't want to happen.
// The same holds true for read().
set_blocking (g_signal_pipe[PIPE_READ], false);
set_blocking (g_signal_pipe[PIPE_WRITE], false);
struct sigaction sa;
sa.sa_flags = SA_RESTART | SA_NOCLDSTOP;
sigemptyset (&sa.sa_mask);
sa.sa_handler = on_sigchld;
if (sigaction (SIGCHLD, &sa, NULL) == -1)
print_error ("%s: %s", "sigaction", strerror (errno));
g_signal_event = poller_fd_make (&ctx->poller, g_signal_pipe[PIPE_READ]);
g_signal_event.dispatcher = (poller_fd_fn) on_signal_pipe_readable;
g_signal_event.user_data = ctx;
poller_fd_set (&g_signal_event, POLLIN);
}
static void
poller_timer_init_and_set (struct poller_timer *self, struct poller *poller,
poller_timer_fn cb, void *user_data)
{
*self = poller_timer_make (poller);
self->dispatcher = cb;
self->user_data = user_data;
poller_timer_set (self, 0);
}
int
main (int argc, char *argv[])
{
g_log_message_real = log_message_custom;
static const struct opt opts[] =
{
{ 'd', "debug", NULL, 0, "run in debug mode" },
{ 'h', "help", NULL, 0, "display this help and exit" },
{ 'V', "version", NULL, 0, "output version information and exit" },
{ '3', "i3bar", NULL, 0, "print output for i3bar/sway-bar instead" },
{ 'w', "write-default-cfg", "FILENAME",
OPT_OPTIONAL_ARG | OPT_LONG_ONLY,
"write a default configuration file and exit" },
{ 0, NULL, NULL, 0, NULL }
};
struct opt_handler oh =
opt_handler_make (argc, argv, opts, NULL, "Set root window name.");
bool i3bar = false;
int c;
while ((c = opt_handler_get (&oh)) != -1)
switch (c)
{
case 'd':
g_debug_mode = true;
break;
case 'h':
opt_handler_usage (&oh, stdout);
exit (EXIT_SUCCESS);
case 'V':
printf (PROGRAM_NAME " " PROGRAM_VERSION "\n");
exit (EXIT_SUCCESS);
case '3':
i3bar = true;
break;
case 'w':
call_simple_config_write_default (optarg, g_config_table);
exit (EXIT_SUCCESS);
default:
print_error ("wrong options");
opt_handler_usage (&oh, stderr);
exit (EXIT_FAILURE);
}
argc -= optind;
argv += optind;
opt_handler_free (&oh);
struct app_context ctx;
app_context_init (&ctx);
ctx.prefix = argc > 1 ? argv[1] : NULL;
setup_signal_handlers (&ctx);
struct error *e = NULL;
if (!simple_config_update_from_file (&ctx.config, &e))
exit_fatal ("%s", e->message);
poller_timer_init_and_set (&ctx.time_changed, &ctx.poller,
on_time_changed, &ctx);
poller_timer_init_and_set (&ctx.make_context, &ctx.poller,
on_make_context, &ctx);
poller_timer_init_and_set (&ctx.refresh_rest, &ctx.poller,
on_refresh_rest, &ctx);
poller_timer_init_and_set (&ctx.command_start, &ctx.poller,
on_command_start, &ctx);
poller_timer_init_and_set (&ctx.mpd_reconnect, &ctx.poller,
on_mpd_reconnect, &ctx);
poller_timer_init_and_set (&ctx.nut_reconnect, &ctx.poller,
on_nut_reconnect, &ctx);
poller_timer_init_and_set (&ctx.noise_timer, &ctx.poller,
on_noise_timer, &ctx);
init_xlib_events (&ctx);
if (i3bar)
ctx.backend = backend_i3_new ();
else
ctx.backend = backend_dwm_new (ctx.dpy);
if (ctx.backend->start)
ctx.backend->start (ctx.backend);
poller_pa_run (ctx.api);
if (ctx.backend->stop)
ctx.backend->stop (ctx.backend);
// We never get here since we don't even handle termination signals
app_context_free (&ctx);
return 0;
}
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