slstatus/slstatus.c

634 lines
14 KiB
C

/* See LICENSE file for copyright and license details. */
#include <alsa/asoundlib.h>
#include <arpa/inet.h>
#include <fcntl.h>
#include <ifaddrs.h>
#include <limits.h>
#include <linux/wireless.h>
#include <locale.h>
#include <netdb.h>
#include <pwd.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <sys/statvfs.h>
#include <sys/socket.h>
#include <sys/sysinfo.h>
#include <sys/types.h>
#include <time.h>
#include <unistd.h>
#include <X11/Xlib.h>
#undef strlcat
#undef strlcpy
#include "strlcat.h"
#include "strlcpy.h"
typedef char *(*op_fun)();
struct arg {
op_fun func;
const char *format;
const char *args;
};
static void setstatus(const char *);
static char *smprintf(const char *, ...);
static char *battery_perc(const char *);
static char *cpu_perc(void);
static char *datetime(const char *);
static char *disk_free(const char *);
static char *disk_perc(const char *);
static char *disk_total(const char *);
static char *disk_used(const char *);
static char *entropy(void);
static char *gid(void);
static char *hostname(void);
static char *ip(const char *);
static char *load_avg(void);
static char *ram_free(void);
static char *ram_perc(void);
static char *ram_used(void);
static char *ram_total(void);
static char *run_command(const char *);
static char *temp(const char *);
static char *uid(void);
static char *uptime(void);
static char *username(void);
static char *vol_perc(const char *);
static char *wifi_perc(const char *);
static char *wifi_essid(const char *);
static Display *dpy;
#include "config.h"
static void
setstatus(const char *str)
{
/* set WM_NAME via X11 */
XStoreName(dpy, DefaultRootWindow(dpy), str);
XSync(dpy, False);
}
static char *
smprintf(const char *fmt, ...)
{
/* FIXME: This code should have
bound checks, it is vulnerable to
buffer overflows */
va_list ap;
char *ret = NULL;
va_start(ap, fmt);
if (vasprintf(&ret, fmt, ap) < 0)
return NULL;
va_end(ap);
return ret;
}
static char *
battery_perc(const char *battery)
{
int now, full, perc;
char batterynowfile[64];
char batteryfullfile[64];
FILE *fp;
strlcpy(batterynowfile, BATTERY_PATH, sizeof(batterynowfile));
strlcat(batterynowfile, battery, sizeof(batterynowfile));
strlcat(batterynowfile, "/", sizeof(batterynowfile));
strlcat(batterynowfile, BATTERY_NOW, sizeof(batterynowfile));
strlcpy(batteryfullfile, BATTERY_PATH, sizeof(batteryfullfile));
strlcat(batteryfullfile, battery, sizeof(batteryfullfile));
strlcat(batteryfullfile, "/", sizeof(batteryfullfile));
strlcat(batteryfullfile, BATTERY_FULL, sizeof(batteryfullfile));
if (!(fp = fopen(batterynowfile, "r"))) {
fprintf(stderr, "Error opening battery file: %s.\n", batterynowfile);
return smprintf(UNKNOWN_STR);
}
fscanf(fp, "%i", &now);
fclose(fp);
if (!(fp = fopen(batteryfullfile, "r"))) {
fprintf(stderr, "Error opening battery file.\n");
return smprintf(UNKNOWN_STR);
}
fscanf(fp, "%i", &full);
fclose(fp);
perc = now / (full / 100);
return smprintf("%d%%", perc);
}
static char *
cpu_perc(void)
{
int perc;
long double a[4], b[4];
FILE *fp;
if (!(fp = fopen("/proc/stat","r"))) {
fprintf(stderr, "Error opening stat file.\n");
return smprintf(UNKNOWN_STR);
}
fscanf(fp, "%*s %Lf %Lf %Lf %Lf", &a[0], &a[1], &a[2], &a[3]);
fclose(fp);
/* wait a second (for avg values) */
sleep(1);
if (!(fp = fopen("/proc/stat","r"))) {
fprintf(stderr, "Error opening stat file.\n");
return smprintf(UNKNOWN_STR);
}
fscanf(fp, "%*s %Lf %Lf %Lf %Lf", &b[0], &b[1], &b[2], &b[3]);
fclose(fp);
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]));
return smprintf("%d%%", perc);
}
static char *
datetime(const char *timeformat)
{
time_t t;
char timestr[80];
t = time(NULL);
if (strftime(timestr, sizeof(timestr), timeformat, localtime(&t)) == 0)
return smprintf(UNKNOWN_STR);
return smprintf("%s", timestr);
}
static char *
disk_free(const char *mountpoint)
{
struct statvfs fs;
if (statvfs(mountpoint, &fs) < 0) {
fprintf(stderr, "Could not get filesystem info.\n");
return smprintf(UNKNOWN_STR);
}
return smprintf("%f", (float)fs.f_bsize * (float)fs.f_bfree / 1024 / 1024 / 1024);
}
static char *
disk_perc(const char *mountpoint)
{
int perc = 0;
struct statvfs fs;
if (statvfs(mountpoint, &fs) < 0) {
fprintf(stderr, "Could not get filesystem info.\n");
return smprintf(UNKNOWN_STR);
}
perc = 100 * (1.0f - ((float)fs.f_bfree / (float)fs.f_blocks));
return smprintf("%d%%", perc);
}
static char *
disk_total(const char *mountpoint)
{
struct statvfs fs;
if (statvfs(mountpoint, &fs) < 0) {
fprintf(stderr, "Could not get filesystem info.\n");
return smprintf(UNKNOWN_STR);
}
return smprintf("%f", (float)fs.f_bsize * (float)fs.f_blocks / 1024 / 1024 / 1024);
}
static char *
disk_used(const char *mountpoint)
{
struct statvfs fs;
if (statvfs(mountpoint, &fs) < 0) {
fprintf(stderr, "Could not get filesystem info.\n");
return smprintf(UNKNOWN_STR);
}
return smprintf("%f", (float)fs.f_bsize * ((float)fs.f_blocks - (float)fs.f_bfree) / 1024 / 1024 / 1024);
}
static char *
entropy(void)
{
int entropy = 0;
FILE *fp;
if (!(fp = fopen("/proc/sys/kernel/random/entropy_avail", "r"))) {
fprintf(stderr, "Could not open entropy file.\n");
return smprintf(UNKNOWN_STR);
}
fscanf(fp, "%d", &entropy);
fclose(fp);
return smprintf("%d", entropy);
}
static char *
gid(void)
{
gid_t gid = getgid();
return smprintf("%d", gid);
}
static char *
hostname(void)
{
char hostname[HOST_NAME_MAX];
FILE *fp;
if (!(fp = fopen("/proc/sys/kernel/hostname", "r"))) {
fprintf(stderr, "Could not open hostname file.\n");
return smprintf(UNKNOWN_STR);
}
fscanf(fp, "%s\n", hostname);
fclose(fp);
return smprintf("%s", hostname);
}
static char *
ip(const char *interface)
{
struct ifaddrs *ifaddr, *ifa;
int s;
char host[NI_MAXHOST];
if (getifaddrs(&ifaddr) == -1) {
fprintf(stderr, "Error getting IP address.\n");
return smprintf(UNKNOWN_STR);
}
/* get the ip address */
for (ifa = ifaddr; ifa != NULL; ifa = ifa->ifa_next) {
if (ifa->ifa_addr == NULL)
continue;
s = getnameinfo(ifa->ifa_addr, sizeof(struct sockaddr_in), host, NI_MAXHOST, NULL, 0, NI_NUMERICHOST);
if ((strcmp(ifa->ifa_name, interface) == 0) && (ifa->ifa_addr->sa_family == AF_INET)) {
if (s != 0) {
fprintf(stderr, "Error getting IP address.\n");
return smprintf(UNKNOWN_STR);
}
return smprintf("%s", host);
}
}
/* free the address */
freeifaddrs(ifaddr);
return smprintf(UNKNOWN_STR);
}
static char *
load_avg(void)
{
double avgs[3];
if (getloadavg(avgs, 3) < 0) {
fprintf(stderr, "Error getting load avg.\n");
return smprintf(UNKNOWN_STR);
}
return smprintf("%.2f %.2f %.2f", avgs[0], avgs[1], avgs[2]);
}
static char *
ram_free(void)
{
long free;
FILE *fp;
if (!(fp = fopen("/proc/meminfo", "r"))) {
fprintf(stderr, "Error opening meminfo file.\n");
return smprintf(UNKNOWN_STR);
}
fscanf(fp, "MemFree: %ld kB\n", &free);
fclose(fp);
return smprintf("%f", (float)free / 1024 / 1024);
}
static char *
ram_perc(void)
{
int perc;
long total, free, buffers, cached;
FILE *fp;
if (!(fp = fopen("/proc/meminfo", "r"))) {
fprintf(stderr, "Error opening meminfo file.\n");
return smprintf(UNKNOWN_STR);
}
fscanf(fp, "MemTotal: %ld kB\n", &total);
fscanf(fp, "MemFree: %ld kB\n", &free);
fscanf(fp, "MemAvailable: %ld kB\nBuffers: %ld kB\n", &buffers, &buffers);
fscanf(fp, "Cached: %ld kB\n", &cached);
fclose(fp);
perc = 100 * ((total - free) - (buffers + cached)) / total;
return smprintf("%d%%", perc);
}
static char *
ram_total(void)
{
long total;
FILE *fp;
if (!(fp = fopen("/proc/meminfo", "r"))) {
fprintf(stderr, "Error opening meminfo file.\n");
return smprintf(UNKNOWN_STR);
}
fscanf(fp, "MemTotal: %ld kB\n", &total);
fclose(fp);
return smprintf("%f", (float)total / 1024 / 1024);
}
static char *
ram_used(void)
{
long free, total, buffers, cached, used;
FILE *fp;
if (!(fp = fopen("/proc/meminfo", "r"))) {
fprintf(stderr, "Error opening meminfo file.\n");
return smprintf(UNKNOWN_STR);
}
fscanf(fp, "MemTotal: %ld kB\n", &total);
fscanf(fp, "MemFree: %ld kB\n", &free);
fscanf(fp, "MemAvailable: %ld kB\nBuffers: %ld kB\n", &buffers, &buffers);
fscanf(fp, "Cached: %ld kB\n", &cached);
fclose(fp);
used = total - free - buffers - cached;
return smprintf("%f", (float)used / 1024 / 1024);
}
static char *
run_command(const char* command)
{
int good;
FILE *fp;
char buffer[64];
if (!(fp = popen(command, "r"))) {
fprintf(stderr, "Could not get command output for: %s.\n", command);
return smprintf(UNKNOWN_STR);
}
fgets(buffer, sizeof(buffer) - 1, fp);
pclose(fp);
for (int i = 0 ; i != sizeof(buffer); i++) {
if (buffer[i] == '\0') {
good = 1;
break;
}
}
if (good)
buffer[strlen(buffer) - 1] = '\0';
return smprintf("%s", buffer);
}
static char *
temp(const char *file)
{
int temperature;
FILE *fp;
if (!(fp = fopen(file, "r"))) {
fprintf(stderr, "Could not open temperature file.\n");
return smprintf(UNKNOWN_STR);
}
fscanf(fp, "%d", &temperature);
fclose(fp);
return smprintf("%d°C", temperature / 1000);
}
static char *
uptime(void)
{
struct sysinfo info;
int hours = 0;
int minutes = 0;
sysinfo(&info);
hours = info.uptime / 3600;
minutes = (info.uptime - hours * 3600 ) / 60;
return smprintf("%dh %dm", hours, minutes);
}
static char *
username(void)
{
register struct passwd *pw;
register uid_t uid;
uid = geteuid();
pw = getpwuid(uid);
if (pw)
return smprintf("%s", pw->pw_name);
else {
fprintf(stderr, "Could not get username.\n");
return smprintf(UNKNOWN_STR);
}
return smprintf(UNKNOWN_STR);
}
static char *
uid(void)
{
register uid_t uid;
uid = geteuid();
if (uid)
return smprintf("%d", uid);
else {
fprintf(stderr, "Could not get uid.\n");
return smprintf(UNKNOWN_STR);
}
return smprintf(UNKNOWN_STR);
}
static char *
vol_perc(const char *soundcard)
{
int mute = 0;
long vol = 0, max = 0, min = 0;
snd_mixer_t *handle;
snd_mixer_elem_t *pcm_mixer, *mas_mixer;
snd_mixer_selem_id_t *vol_info, *mute_info;
snd_mixer_open(&handle, 0);
snd_mixer_attach(handle, soundcard);
snd_mixer_selem_register(handle, NULL, NULL);
snd_mixer_load(handle);
snd_mixer_selem_id_malloc(&vol_info);
snd_mixer_selem_id_malloc(&mute_info);
if (vol_info == NULL || mute_info == NULL) {
fprintf(stderr, "Could not get alsa volume.\n");
return smprintf(UNKNOWN_STR);
}
snd_mixer_selem_id_set_name(vol_info, ALSA_CHANNEL);
snd_mixer_selem_id_set_name(mute_info, ALSA_CHANNEL);
pcm_mixer = snd_mixer_find_selem(handle, vol_info);
mas_mixer = snd_mixer_find_selem(handle, mute_info);
snd_mixer_selem_get_playback_volume_range((snd_mixer_elem_t *)pcm_mixer, &min, &max);
snd_mixer_selem_get_playback_volume((snd_mixer_elem_t *)pcm_mixer, SND_MIXER_SCHN_MONO, &vol);
snd_mixer_selem_get_playback_switch(mas_mixer, SND_MIXER_SCHN_MONO, &mute);
if (vol_info)
snd_mixer_selem_id_free(vol_info);
if (mute_info)
snd_mixer_selem_id_free(mute_info);
if (handle)
snd_mixer_close(handle);
if (!mute)
return smprintf("mute");
else
return smprintf("%d%%", (vol * 100) / max);
}
static char *
wifi_perc(const char *wificard)
{
int bufsize = 255;
int strength;
char buf[bufsize];
char *datastart;
char path[64];
char status[5];
char needle[sizeof wificard + 1];
FILE *fp;
memset(path, 0, sizeof path);
strlcat(path, "/sys/class/net/", sizeof(path));
strlcat(path, wificard, sizeof(path));
strlcat(path, "/operstate", sizeof(path));
if(!(fp = fopen(path, "r"))) {
fprintf(stderr, "Error opening wifi operstate file.\n");
return smprintf(UNKNOWN_STR);
}
fgets(status, 5, fp);
fclose(fp);
if(strcmp(status, "up\n") != 0)
return smprintf(UNKNOWN_STR);
if (!(fp = fopen("/proc/net/wireless", "r"))) {
fprintf(stderr, "Error opening wireless file.\n");
return smprintf(UNKNOWN_STR);
}
strlcpy(needle, wificard, sizeof(needle));
strlcat(needle, ":", sizeof(needle));
fgets(buf, bufsize, fp);
fgets(buf, bufsize, fp);
fgets(buf, bufsize, fp);
if ((datastart = strstr(buf, needle)) != NULL) {
datastart = strstr(buf, ":");
sscanf(datastart + 1, " %*d %d %*d %*d %*d %*d %*d %*d %*d %*d", &strength);
}
fclose(fp);
return smprintf("%d%%", strength);
}
static char *
wifi_essid(const char *wificard)
{
char id[IW_ESSID_MAX_SIZE+1];
int sockfd;
struct iwreq wreq;
memset(&wreq, 0, sizeof(struct iwreq));
wreq.u.essid.length = IW_ESSID_MAX_SIZE+1;
sprintf(wreq.ifr_name, wificard);
if((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) == -1) {
fprintf(stderr, "Cannot open socket for interface: %s\n", wificard);
return smprintf(UNKNOWN_STR);
}
wreq.u.essid.pointer = id;
if (ioctl(sockfd,SIOCGIWESSID, &wreq) == -1) {
fprintf(stderr, "Get ESSID ioctl failed for interface %s\n", wificard);
return smprintf(UNKNOWN_STR);
}
if (strcmp((char *)wreq.u.essid.pointer, "") == 0)
return smprintf(UNKNOWN_STR);
else
return smprintf("%s", (char *)wreq.u.essid.pointer);
}
int
main(void)
{
size_t i;
char status_string[4096];
char *res, *element;
struct arg argument;
if (!(dpy = XOpenDisplay(0x0))) {
fprintf(stderr, "Cannot open display!\n");
exit(1);
}
for (;;) {
memset(status_string, 0, sizeof(status_string));
for (i = 0; i < sizeof(args) / sizeof(args[0]); ++i) {
argument = args[i];
if (argument.args == NULL)
res = argument.func();
else
res = argument.func(argument.args);
element = smprintf(argument.format, res);
if (element == NULL) {
element = smprintf(UNKNOWN_STR);
fprintf(stderr, "Failed to format output.\n");
}
strlcat(status_string, element, sizeof(status_string));
free(res);
free(element);
}
setstatus(status_string);
sleep(UPDATE_INTERVAL -1);
}
XCloseDisplay(dpy);
return 0;
}