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#include <assert.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <poll.h>
#include <sys/time.h>
#define LOG_MODULE "clock"
#define LOG_ENABLE_DBG 0
#include "../bar/bar.h"
#include "../config-verify.h"
#include "../config.h"
#include "../log.h"
#include "../plugin.h"
struct private
{
struct particle *label;
enum {
UPDATE_GRANULARITY_SECONDS,
UPDATE_GRANULARITY_MINUTES,
} update_granularity;
char *date_format;
char *time_format;
bool utc;
};
static void
destroy(struct module *mod)
{
struct private *m = mod->private;
m->label->destroy(m->label);
free(m->time_format);
free(m->date_format);
free(m);
module_default_destroy(mod);
}
static const char *
description(const struct module *mod)
{
return "clock";
}
static struct exposable *
content(struct module *mod)
{
const struct private *m = mod->private;
time_t t = time(NULL);
struct tm *tm = m->utc ? gmtime(&t) : localtime(&t);
char date_str[1024];
strftime(date_str, sizeof(date_str), m->date_format, tm);
char time_str[1024];
strftime(time_str, sizeof(time_str), m->time_format, tm);
struct tag_set tags = {
.tags = (struct tag *[]){tag_new_string(mod, "time", time_str), tag_new_string(mod, "date", date_str)},
.count = 2,
};
struct exposable *exposable = m->label->instantiate(m->label, &tags);
tag_set_destroy(&tags);
return exposable;
}
static int
run(struct module *mod)
{
const struct private *m = mod->private;
const struct bar *bar = mod->bar;
bar->refresh(bar);
int ret = 1;
while (true) {
struct timespec _now;
clock_gettime(CLOCK_REALTIME, &_now);
const struct timeval now = {
.tv_sec = _now.tv_sec,
.tv_usec = _now.tv_nsec / 1000,
};
int timeout_ms = 1000;
switch (m->update_granularity) {
case UPDATE_GRANULARITY_SECONDS: {
const struct timeval next_second = {.tv_sec = now.tv_sec + 1, .tv_usec = 0};
struct timeval _timeout;
timersub(&next_second, &now, &_timeout);
assert(_timeout.tv_sec == 0 || (_timeout.tv_sec == 1 && _timeout.tv_usec == 0));
timeout_ms = _timeout.tv_usec / 1000;
break;
}
case UPDATE_GRANULARITY_MINUTES: {
const struct timeval next_minute = {
.tv_sec = now.tv_sec / 60 * 60 + 60,
.tv_usec = 0,
};
struct timeval _timeout;
timersub(&next_minute, &now, &_timeout);
timeout_ms = _timeout.tv_sec * 1000 + _timeout.tv_usec / 1000;
}
}
/* Add 1ms to account for rounding errors */
timeout_ms++;
LOG_DBG("now: %lds %ldµs -> timeout: %dms", now.tv_sec, now.tv_usec, timeout_ms);
struct pollfd fds[] = {{.fd = mod->abort_fd, .events = POLLIN}};
if (poll(fds, 1, timeout_ms) < 0) {
if (errno == EINTR)
continue;
LOG_ERRNO("failed to poll");
break;
}
if (fds[0].revents & POLLIN) {
ret = 0;
break;
}
bar->refresh(bar);
}
return ret;
}
static struct module *
clock_new(struct particle *label, const char *date_format, const char *time_format, bool utc)
{
struct private *m = calloc(1, sizeof(*m));
m->label = label;
m->date_format = strdup(date_format);
m->time_format = strdup(time_format);
m->utc = utc;
static const char *const seconds_formatters[] = {
"%c", "%s", "%S", "%T", "%r", "%X",
};
m->update_granularity = UPDATE_GRANULARITY_MINUTES;
for (size_t i = 0; i < sizeof(seconds_formatters) / sizeof(seconds_formatters[0]); i++) {
if (strstr(time_format, seconds_formatters[i]) != NULL) {
m->update_granularity = UPDATE_GRANULARITY_SECONDS;
break;
}
}
LOG_DBG("using %s update granularity",
(m->update_granularity == UPDATE_GRANULARITY_MINUTES ? "minutes" : "seconds"));
struct module *mod = module_common_new();
mod->private = m;
mod->run = &run;
mod->destroy = &destroy;
mod->content = &content;
mod->description = &description;
return mod;
}
static struct module *
from_conf(const struct yml_node *node, struct conf_inherit inherited)
{
const struct yml_node *c = yml_get_value(node, "content");
const struct yml_node *date_format = yml_get_value(node, "date-format");
const struct yml_node *time_format = yml_get_value(node, "time-format");
const struct yml_node *utc = yml_get_value(node, "utc");
return clock_new(conf_to_particle(c, inherited), date_format != NULL ? yml_value_as_string(date_format) : "%x",
time_format != NULL ? yml_value_as_string(time_format) : "%H:%M",
utc != NULL ? yml_value_as_bool(utc) : false);
}
static bool
verify_conf(keychain_t *chain, const struct yml_node *node)
{
static const struct attr_info attrs[] = {
{"date-format", false, &conf_verify_string},
{"time-format", false, &conf_verify_string},
{"utc", false, &conf_verify_bool},
MODULE_COMMON_ATTRS,
};
return conf_verify_dict(chain, node, attrs);
}
const struct module_iface module_clock_iface = {
.verify_conf = &verify_conf,
.from_conf = &from_conf,
};
#if defined(CORE_PLUGINS_AS_SHARED_LIBRARIES)
extern const struct module_iface iface __attribute__((weak, alias("module_clock_iface")));
#endif
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