133 lines
2.8 KiB
C
133 lines
2.8 KiB
C
#include <errno.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 "util.h"
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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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char buf[1024];
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static volatile sig_atomic_t done;
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static Display *dpy;
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const unsigned short interval = 1000;
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const char unknown_str[] = "n/a";
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#define MAXLEN 2048
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static void
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terminate(const int signo)
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{
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if (signo != SIGUSR1)
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done = 1;
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}
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static void
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difftimespec(struct timespec *res, struct timespec *a, struct timespec *b)
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{
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res->tv_sec = a->tv_sec - b->tv_sec - (a->tv_nsec < b->tv_nsec);
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res->tv_nsec = a->tv_nsec - b->tv_nsec +
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(a->tv_nsec < b->tv_nsec) * 1E9;
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}
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const char *
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run_command(const char *cmd)
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{
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char *p;
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FILE *fp;
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if (!(fp = popen(cmd, "r"))) {
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return NULL;
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}
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p = fgets(buf, sizeof(buf) - 1, fp);
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if (pclose(fp) < 0) {
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return NULL;
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}
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if (!p)
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return NULL;
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if ((p = strrchr(buf, '\n')))
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p[0] = '\0';
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return buf[0] ? buf : NULL;
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}
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static const
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struct arg args[] = {
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{ run_command, " %s till swap • ", "sh /home/andrew/.config/suckless/slstatus/scripts/wallpaper-countdown.sh" },
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{ run_command, "VOL at %s • ", "wpctl get-volume @DEFAULT_AUDIO_SINK@ | awk '{printf \"%d%%\", $2 * 100}'" },
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{ run_command, "%s / 731 installed ", "sh -c 'echo $(( ( $(date +%s) - $(stat -c %W /) ) / 86400 ))'" },
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};
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int
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main(int argc, char *argv[])
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{
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struct sigaction act;
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struct timespec start, current, diff, intspec, wait;
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size_t i, len;
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int ret;
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char status[MAXLEN];
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const char *res;
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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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sigaction(SIGUSR1, &act, NULL);
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if (!(dpy = XOpenDisplay(NULL)))
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die("XOpenDisplay: Failed to open display");
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do {
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if (clock_gettime(CLOCK_MONOTONIC, &start) < 0)
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die("clock_gettime:");
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status[0] = '\0';
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for (i = len = 0; i < LEN(args); i++) {
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if (!(res = args[i].func(args[i].args)))
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res = unknown_str;
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if ((ret = esnprintf(status + len, sizeof(status) - len,
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args[i].fmt, res)) < 0)
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break;
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len += ret;
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}
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if (XStoreName(dpy, DefaultRootWindow(dpy), status) < 0)
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die("XStoreName: Allocation failed");
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XFlush(dpy);
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if (!done) {
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if (clock_gettime(CLOCK_MONOTONIC, ¤t) < 0)
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die("clock_gettime:");
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difftimespec(&diff, ¤t, &start);
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intspec.tv_sec = interval / 1000;
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intspec.tv_nsec = (interval % 1000) * 1E6;
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difftimespec(&wait, &intspec, &diff);
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if (wait.tv_sec >= 0 &&
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nanosleep(&wait, NULL) < 0 &&
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errno != EINTR)
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die("nanosleep:");
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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)
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die("XCloseDisplay: Failed to close display");
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return 0;
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}
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