77 lines
2.0 KiB
C
77 lines
2.0 KiB
C
#define _GNU_SOURCE
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#define AT_FDCWD -100
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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 <time.h>
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#include <sys/stat.h>
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#include <X11/Xlib.h>
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const char* vol() {
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static char buf[5];
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float v;
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FILE *fp = popen("wpctl get-volume @DEFAULT_AUDIO_SINK@", "r");
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if (!fp || fscanf(fp, "Volume: %f", &v) != 1) return NULL;
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pclose(fp);
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snprintf(buf, sizeof(buf), "%d%%", (int)(v * 100));
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return buf;
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}
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const char* age() {
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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 < 900) return buf;
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struct statx stx;
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time_t created = (!syscall(SYS_statx, AT_FDCWD, "/", 0, STATX_BTIME, &stx) && (stx.stx_mask & STATX_BTIME)) ? stx.stx_btime.tv_sec : 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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volatile sig_atomic_t done = 0;
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void terminate() { done = 1; }
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void die(const char *msg) {
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fprintf(stderr, "%s\n", msg);
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exit(1);
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}
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int main() {
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Display *dpy;
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size_t i, len;
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int ret;
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char status[18];
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struct sigaction act = { .sa_handler = terminate, .sa_flags = SA_RESTART };
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struct arg {
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const char *(*func)(void);
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const char *fmt;
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};
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const struct arg args[] = {
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{ vol, "V: %s " }, // 9 bytes
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{ age, "A: %sd" }, // 8 bytes
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};
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sigaction(SIGINT, &act, NULL);
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sigaction(SIGTERM, &act, NULL);
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if (!(dpy = XOpenDisplay(NULL))) die("XOpenDisplay: Failed to open display");
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while(!done) {
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status[0] = '\0';
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for (i = len = 0; i < 2; i++) {
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const char *res = args[i].func();
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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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nanosleep(&(struct timespec){ .tv_sec = 0, .tv_nsec = 500 * 1000000 }, NULL); // 500ms
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}
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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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