466 lines
11 KiB
C
466 lines
11 KiB
C
/* See LICENSE file for copyright and license details. */
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/* global libraries */
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#include <alsa/asoundlib.h>
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#include <arpa/inet.h>
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#include <fcntl.h>
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#include <ifaddrs.h>
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#include <locale.h>
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#include <netdb.h>
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#include <stdarg.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 <sys/types.h>
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#include <sys/stat.h>
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#include <sys/statvfs.h>
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#include <sys/socket.h>
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#include <time.h>
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#include <unistd.h>
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#include <X11/Xlib.h>
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/* local headers */
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#include "slstatus.h"
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#include "config.h"
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/* set statusbar */
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void
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setstatus(const char *str)
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{
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/* set WM_NAME via X11 */
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XStoreName(dpy, DefaultRootWindow(dpy), str);
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XSync(dpy, False);
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}
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/* smprintf function */
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char *
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smprintf(const char *fmt, ...)
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{
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va_list fmtargs;
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char *ret = NULL;
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va_start(fmtargs, fmt);
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if (vasprintf(&ret, fmt, fmtargs) < 0)
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return NULL;
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va_end(fmtargs);
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return ret;
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}
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/* battery percentage */
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char *
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battery_perc(const char *battery)
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{
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int now, full, perc;
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char batterynowfile[64] = "";
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char batteryfullfile[64] = "";
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FILE *fp;
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/* generate battery nowfile path */
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strcat(batterynowfile, batterypath);
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strcat(batterynowfile, battery);
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strcat(batterynowfile, "/");
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strcat(batterynowfile, batterynow);
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/* generate battery fullfile path */
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strcat(batteryfullfile, batterypath);
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strcat(batteryfullfile, battery);
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strcat(batteryfullfile, "/");
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strcat(batteryfullfile, batteryfull);
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/* open battery now file */
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if (!(fp = fopen(batterynowfile, "r"))) {
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fprintf(stderr, "Error opening battery file.%s",batterynowfile);
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return smprintf("n/a");
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}
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/* read value */
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fscanf(fp, "%i", &now);
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/* close battery now file */
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fclose(fp);
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/* open battery full file */
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if (!(fp = fopen(batteryfullfile, "r"))) {
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fprintf(stderr, "Error opening battery file.");
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return smprintf("n/a");
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}
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/* read value */
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fscanf(fp, "%i", &full);
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/* close battery full file */
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fclose(fp);
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/* calculate percent */
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perc = now / (full / 100);
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/* return perc as string */
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return smprintf("%d%%", perc);
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}
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/* cpu percentage */
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char *
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cpu_perc(const char *null)
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{
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int perc;
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long double a[4], b[4];
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FILE *fp;
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/* open stat file */
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if (!(fp = fopen("/proc/stat","r"))) {
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fprintf(stderr, "Error opening stat file.");
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return smprintf("n/a");
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}
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/* read values */
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fscanf(fp, "%*s %Lf %Lf %Lf %Lf", &a[0], &a[1], &a[2], &a[3]);
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/* close stat file */
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fclose(fp);
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/* wait a second (for avg values) */
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sleep(1);
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/* open stat file */
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if (!(fp = fopen("/proc/stat","r"))) {
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fprintf(stderr, "Error opening stat file.");
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return smprintf("n/a");
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}
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/* read values */
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fscanf(fp, "%*s %Lf %Lf %Lf %Lf", &b[0], &b[1], &b[2], &b[3]);
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/* close stat file */
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fclose(fp);
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/* calculate avg in this second */
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perc = 100 * ((b[0]+b[1]+b[2]) - (a[0]+a[1]+a[2])) / ((b[0]+b[1]+b[2]+b[3]) - (a[0]+a[1]+a[2]+a[3]));
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/* return perc as string */
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return smprintf("%d%%", perc);
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}
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/* date and time */
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char *
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datetime(const char *timeformat)
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{
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time_t tm;
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size_t bufsize = 64;
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char *buf = malloc(bufsize);
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/* get time in format */
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time(&tm);
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setlocale(LC_TIME, "");
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if(!strftime(buf, bufsize, timeformat, localtime(&tm))) {
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setlocale(LC_TIME, "C");
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fprintf(stderr, "Strftime failed.\n");
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return smprintf("n/a");
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}
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setlocale(LC_TIME, "C");
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/* return time */
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char *ret = smprintf("%s", buf);
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free(buf);
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return ret;
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}
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/* disk usage percentage */
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char *
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disk_perc(const char *mountpoint)
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{
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int perc = 0;
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struct statvfs fs;
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/* try to open mountpoint */
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if (statvfs(mountpoint, &fs) < 0) {
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fprintf(stderr, "Could not get filesystem info.\n");
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return smprintf("n/a");
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}
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/* calculate percent */
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perc = 100 * (1.0f - ((float)fs.f_bavail / (float)fs.f_blocks));
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/* return perc */
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return smprintf("%d%%", perc);
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}
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/* entropy available */
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char *
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entropy(const char *null)
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{
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int entropy = 0;
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FILE *fp;
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/* open entropy file */
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if (!(fp = fopen("/proc/sys/kernel/random/entropy_avail", "r"))) {
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fprintf(stderr, "Could not open entropy file.\n");
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return smprintf("n/a");
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}
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/* extract entropy */
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fscanf(fp, "%d", &entropy);
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/* close entropy file */
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fclose(fp);
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/* return entropy */
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return smprintf("%d", entropy);
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}
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/* hostname */
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char *
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hostname(const char *null)
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{
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char *hostname = "";
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FILE *fp;
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/* open hostname file */
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if (!(fp = fopen("/proc/sys/kernel/hostname", "r"))) {
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fprintf(stderr, "Could not open hostname file.\n");
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return smprintf("n/a");
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}
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/* extract hostname */
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fscanf(fp, "%s", hostname);
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/* close hostname file */
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fclose(fp);
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/* return entropy */
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return smprintf("%s", hostname);
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}
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/* ip address */
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char *
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ip(const char *interface)
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{
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struct ifaddrs *ifaddr, *ifa;
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int s;
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char host[NI_MAXHOST];
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/* check if getting ip address works */
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if (getifaddrs(&ifaddr) == -1)
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{
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fprintf(stderr, "Error getting IP address.");
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return smprintf("n/a");
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}
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/* get the ip address */
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for (ifa = ifaddr; ifa != NULL; ifa = ifa->ifa_next)
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{
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if (ifa->ifa_addr == NULL)
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continue;
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s = getnameinfo(ifa->ifa_addr, sizeof(struct sockaddr_in), host, NI_MAXHOST, NULL, 0, NI_NUMERICHOST);
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if ((strcmp(ifa->ifa_name, interface) == 0) && (ifa->ifa_addr->sa_family == AF_INET))
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{
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if (s != 0)
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{
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fprintf(stderr, "Error getting IP address.");
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return smprintf("n/a");
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}
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return smprintf("%s", host);
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}
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}
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/* free the address */
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freeifaddrs(ifaddr);
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/* return n/a if nothing works */
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return smprintf("n/a");
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}
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/* ram percentage */
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char *
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ram_perc(const char *null)
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{
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int perc;
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long total, free, buffers, cached;
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FILE *fp;
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/* open meminfo file */
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if (!(fp = fopen("/proc/meminfo", "r"))) {
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fprintf(stderr, "Error opening meminfo file.");
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return smprintf("n/a");
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}
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/* read the values */
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fscanf(fp, "MemTotal: %ld kB\n", &total);
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fscanf(fp, "MemFree: %ld kB\n", &free);
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fscanf(fp, "MemAvailable: %ld kB\nBuffers: %ld kB\n", &buffers, &buffers);
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fscanf(fp, "Cached: %ld kB\n", &cached);
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/* close meminfo file */
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fclose(fp);
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/* calculate percentage */
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perc = 100 * ((total - free) - (buffers + cached)) / total;
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/* return perc as string */
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return smprintf("%d%%", perc);
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}
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/* temperature */
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char *
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temp(const char *file)
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{
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int temperature;
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FILE *fp;
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/* open temperature file */
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if (!(fp = fopen(file, "r"))) {
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fprintf(stderr, "Could not open temperature file.\n");
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return smprintf("n/a");
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}
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/* extract temperature */
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fscanf(fp, "%d", &temperature);
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/* close temperature file */
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fclose(fp);
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/* return temperature in degrees */
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return smprintf("%d°C", temperature / 1000);
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}
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/* alsa volume percentage */
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char *
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vol_perc(const char *soundcard)
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{
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int mute = 0;
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long vol = 0, max = 0, min = 0;
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/* get volume from alsa */
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snd_mixer_t *handle;
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snd_mixer_elem_t *pcm_mixer, *mas_mixer;
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snd_mixer_selem_id_t *vol_info, *mute_info;
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snd_mixer_open(&handle, 0);
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snd_mixer_attach(handle, soundcard);
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snd_mixer_selem_register(handle, NULL, NULL);
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snd_mixer_load(handle);
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snd_mixer_selem_id_malloc(&vol_info);
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snd_mixer_selem_id_malloc(&mute_info);
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snd_mixer_selem_id_set_name(vol_info, channel);
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snd_mixer_selem_id_set_name(mute_info, channel);
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pcm_mixer = snd_mixer_find_selem(handle, vol_info);
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mas_mixer = snd_mixer_find_selem(handle, mute_info);
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snd_mixer_selem_get_playback_volume_range((snd_mixer_elem_t *)pcm_mixer, &min, &max);
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snd_mixer_selem_get_playback_volume((snd_mixer_elem_t *)pcm_mixer, SND_MIXER_SCHN_MONO, &vol);
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snd_mixer_selem_get_playback_switch(mas_mixer, SND_MIXER_SCHN_MONO, &mute);
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if (vol_info)
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snd_mixer_selem_id_free(vol_info);
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if (mute_info)
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snd_mixer_selem_id_free(mute_info);
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if (handle)
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snd_mixer_close(handle);
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/* return the string (mute) */
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if (!mute)
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return smprintf("mute");
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else
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return smprintf("%d%%", (vol * 100) / max);
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}
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/* wifi percentage */
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char *
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wifi_perc(const char *wificard)
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{
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int bufsize = 255;
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int strength;
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char buf[bufsize];
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char *datastart;
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char path[64];
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char status[5];
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char needle[sizeof wificard + 1];
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FILE *fp;
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/* generate the path name */
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memset(path, 0, sizeof path);
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strcat(path, "/sys/class/net/");
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strcat(path, wificard);
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strcat(path, "/operstate");
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/* open wifi file */
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if(!(fp = fopen(path, "r"))) {
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fprintf(stderr, "Error opening wifi operstate file.");
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return smprintf("n/a");
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}
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/* read the status */
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fgets(status, 5, fp);
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/* close wifi file */
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fclose(fp);
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/* check if interface down */
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if(strcmp(status, "up\n") != 0){
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return smprintf("n/a");
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}
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/* open wifi file */
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if (!(fp = fopen("/proc/net/wireless", "r"))) {
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fprintf(stderr, "Error opening wireless file.");
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return smprintf("n/a");
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}
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/* extract the signal strength */
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strcpy(needle, wificard);
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strcat(needle, ":");
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fgets(buf, bufsize, fp);
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fgets(buf, bufsize, fp);
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fgets(buf, bufsize, fp);
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if ((datastart = strstr(buf, needle)) != NULL) {
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datastart = strstr(buf, ":");
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sscanf(datastart + 1, " %*d %d %*d %*d %*d %*d %*d %*d %*d %*d", &strength);
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}
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/* close wifi file */
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fclose(fp);
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/* return strength in percent */
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return smprintf("%d%%", strength);
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}
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/* main function */
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int
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main()
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{
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char status_string[1024];
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struct arg argument;
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/* try to open display */
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if (!(dpy = XOpenDisplay(0x0))) {
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fprintf(stderr, "Cannot open display!\n");
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exit(1);
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}
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/* return status every interval */
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for (;;) {
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/* clear the string */
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memset(status_string, 0, sizeof(status_string));
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/* generate status_string */
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for (size_t i = 0; i < sizeof(args) / sizeof(args[0]); ++i) {
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argument = args[i];
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char *res = argument.func(argument.args);
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char *element = smprintf(argument.format, res);
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strcat(status_string, element);
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free(res);
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free(element);
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}
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/* return the statusbar */
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setstatus(status_string);
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/* wait, "update_interval - 1" because of get_cpu_usage() which uses 1 second */
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sleep(update_interval -1);
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}
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/* close display */
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XCloseDisplay(dpy);
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/* exit successfully */
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return 0;
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}
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