120 lines
2.9 KiB
C
120 lines
2.9 KiB
C
#define _GNU_SOURCE
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#include <fcntl.h> // for AT_FDCWD
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#include <sys/syscall.h>
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#include <unistd.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <time.h>
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#include <X11/Xlib.h>
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#include <stdarg.h>
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#include <sys/stat.h>
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static volatile sig_atomic_t done;
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void die(const char *fmt, ...) {
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va_list ap;
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va_start(ap, fmt);
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vfprintf(stderr, fmt, ap);
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va_end(ap);
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fputc('\n', stderr);
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exit(1);
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}
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struct arg {
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const char *(*func)(const char *);
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const char *fmt;
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const char *args;
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};
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static void terminate() {
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done = 1;
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}
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const char* bg_timer(const char *unused) {
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(void)unused;
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static char buf[6];
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time_t now = time(NULL), last = now;
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FILE *f = fopen("/tmp/last_wallpaper_time", "r");
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if (f) {
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if (fscanf(f, "%ld", &last) != 1) last = now;
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fclose(f);
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}
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int rem = 600 - (int)(now - last);
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if (rem < 0) rem = 0;
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if (snprintf(buf, sizeof(buf), "%02d:%02d", (rem / 60), (rem % 60)) < 0) return NULL;
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return buf;
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}
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const char* run_command(const char *cmd) {
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static char buf[8];
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FILE *fp = popen(cmd, "r");
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if (!fp) return NULL;
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char *p = fgets(buf, sizeof(buf) - 1, fp);
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pclose(fp);
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if (!p) return NULL;
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if ((p = strrchr(buf, '\n'))) *p = '\0';
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return *buf ? buf : NULL;
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}
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const char* age(const char *_) {
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static char buf[4];
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static time_t last;
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time_t now = time(NULL);
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if (now - last < 3600) return buf;
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time_t created = 0;
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struct statx stx;
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if (!syscall(SYS_statx, AT_FDCWD, "/", 0, STATX_BTIME, &stx) && (stx.stx_mask & STATX_BTIME)) created = stx.stx_btime.tv_sec;
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else created = now;
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snprintf(buf, sizeof(buf), "%d", (int)((now - created) / 86400));
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last = now;
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return buf;
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}
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int main(int argc, char *argv[]) {
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static Display *dpy;
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struct sigaction act;
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size_t i, len;
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int ret;
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char status[64];
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const char *res;
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static const struct arg args[] = {
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{ bg_timer, " %s till swap · ", NULL },
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{ run_command, "VOL at %s · ", "wpctl get-volume @DEFAULT_AUDIO_SINK@ | awk '{printf \"%d%%\", $2 * 100}'" },
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{ age, "%s / 731 installed ", NULL },
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};
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memset(&act, 0, sizeof(act));
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act.sa_handler = terminate;
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sigaction(SIGINT, &act, NULL);
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sigaction(SIGTERM, &act, NULL);
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act.sa_flags |= SA_RESTART;
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if (!(dpy = XOpenDisplay(NULL))) die("XOpenDisplay: Failed to open display");
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do {
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status[0] = '\0';
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for (i = len = 0; i < (sizeof(args) / sizeof(args[0])); i++) {
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res = args[i].func(args[i].args);
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if (!res) res = "n/a";
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if ((ret = snprintf(status + len, sizeof(status) - len, args[i].fmt, res)) < 0) break;
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len += ret;
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}
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if (XStoreName(dpy, DefaultRootWindow(dpy), status) < 0) die("XStoreName: Allocation failed");
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XFlush(dpy);
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if (!done) {
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struct timespec ts = { .tv_sec = 0, .tv_nsec = 100 * 1000000 }; // 100ms
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nanosleep(&ts, NULL);
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}
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} while (!done);
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XStoreName(dpy, DefaultRootWindow(dpy), NULL);
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if (XCloseDisplay(dpy) < 0) die("XCloseDisplay: Failed to close display");
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return 0;
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}
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