7fe240856e
This is (arguably) more elegant and it matches Xlib output logic. Also use puts instead of printf as we don't do formating there.
137 lines
2.4 KiB
C
137 lines
2.4 KiB
C
/* See LICENSE file for copyright and license details. */
|
|
#include <errno.h>
|
|
#include <signal.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <time.h>
|
|
#include <X11/Xlib.h>
|
|
|
|
#include "arg.h"
|
|
#include "slstatus.h"
|
|
#include "util.h"
|
|
|
|
struct arg {
|
|
const char *(*func)();
|
|
const char *fmt;
|
|
const char *args;
|
|
};
|
|
|
|
char buf[1024];
|
|
static int done;
|
|
static Display *dpy;
|
|
|
|
#include "config.h"
|
|
|
|
static void
|
|
terminate(const int signo)
|
|
{
|
|
(void)signo;
|
|
|
|
done = 1;
|
|
}
|
|
|
|
static void
|
|
difftimespec(struct timespec *res, struct timespec *a, struct timespec *b)
|
|
{
|
|
res->tv_sec = a->tv_sec - b->tv_sec - (a->tv_nsec < b->tv_nsec);
|
|
res->tv_nsec = a->tv_nsec - b->tv_nsec +
|
|
(a->tv_nsec < b->tv_nsec) * 1E9;
|
|
}
|
|
|
|
static void
|
|
usage(void)
|
|
{
|
|
die("usage: %s [-s]", argv0);
|
|
}
|
|
|
|
int
|
|
main(int argc, char *argv[])
|
|
{
|
|
struct sigaction act;
|
|
struct timespec start, current, diff, intspec, wait;
|
|
size_t i, len;
|
|
int sflag, ret;
|
|
char status[MAXLEN];
|
|
const char *res;
|
|
|
|
sflag = 0;
|
|
ARGBEGIN {
|
|
case 's':
|
|
sflag = 1;
|
|
break;
|
|
default:
|
|
usage();
|
|
} ARGEND
|
|
|
|
if (argc) {
|
|
usage();
|
|
}
|
|
|
|
memset(&act, 0, sizeof(act));
|
|
act.sa_handler = terminate;
|
|
sigaction(SIGINT, &act, NULL);
|
|
sigaction(SIGTERM, &act, NULL);
|
|
|
|
if (!sflag && !(dpy = XOpenDisplay(NULL))) {
|
|
die("XOpenDisplay: Failed to open display");
|
|
}
|
|
|
|
while (!done) {
|
|
if (clock_gettime(CLOCK_MONOTONIC, &start) < 0) {
|
|
die("clock_gettime:");
|
|
}
|
|
|
|
status[0] = '\0';
|
|
for (i = len = 0; i < LEN(args); i++) {
|
|
if (!(res = args[i].func(args[i].args))) {
|
|
res = unknown_str;
|
|
}
|
|
if ((ret = esnprintf(status + len, sizeof(status) - len,
|
|
args[i].fmt, res)) < 0) {
|
|
break;
|
|
}
|
|
len += ret;
|
|
}
|
|
|
|
if (sflag) {
|
|
puts(status);
|
|
fflush(stdout);
|
|
if (ferror(stdout))
|
|
die("puts:");
|
|
} else {
|
|
if (XStoreName(dpy, DefaultRootWindow(dpy), status) < 0) {
|
|
die("XStoreName: Allocation failed");
|
|
}
|
|
XFlush(dpy);
|
|
}
|
|
|
|
if (!done) {
|
|
if (clock_gettime(CLOCK_MONOTONIC, ¤t) < 0) {
|
|
die("clock_gettime:");
|
|
}
|
|
difftimespec(&diff, ¤t, &start);
|
|
|
|
intspec.tv_sec = interval / 1000;
|
|
intspec.tv_nsec = (interval % 1000) * 1E6;
|
|
difftimespec(&wait, &intspec, &diff);
|
|
|
|
if (wait.tv_sec >= 0) {
|
|
if (nanosleep(&wait, NULL) < 0 &&
|
|
errno != EINTR) {
|
|
die("nanosleep:");
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!sflag) {
|
|
XStoreName(dpy, DefaultRootWindow(dpy), NULL);
|
|
if (XCloseDisplay(dpy) < 0) {
|
|
die("XCloseDisplay: Failed to close display");
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|