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slstatus/slstatus.c
Ali H. Fardan 9b2dc25348 use warn[x]() instead of long fprintf()s
2016-09-08 04:45:00 +03:00

598 lines
12 KiB
C
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/* See LICENSE file for copyright and license details. */
#include <alsa/asoundlib.h>
#include <err.h>
#include <fcntl.h>
#include <ifaddrs.h>
#include <limits.h>
#include <linux/wireless.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"
#include "concat.h"
char concat[];
struct arg {
char *(*func)();
const char *format;
const char *args;
};
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 char *
smprintf(const char *fmt, ...)
{
va_list ap;
char *ret;
int len;
va_start(ap, fmt);
len = vsnprintf(NULL, 0, fmt, ap);
va_end(ap);
ret = malloc(++len);
if (ret == NULL) {
perror("malloc");
exit(1);
}
va_start(ap, fmt);
vsnprintf(ret, len, fmt, ap);
va_end(ap);
return ret;
}
static char *
battery_perc(const char *battery)
{
int now, full, perc;
FILE *fp;
ccat(4, BATTERY_PATH, battery, "/", BATTERY_NOW);
fp = fopen(concat, "r");
if (fp == NULL) {
warn("Error opening battery file: %s", concat);
return smprintf(UNKNOWN_STR);
}
fscanf(fp, "%i", &now);
fclose(fp);
ccat(4, BATTERY_PATH, battery, "/", BATTERY_FULL);
fp = fopen(concat, "r");
if (fp == NULL) {
warn("Error opening battery file: %s", concat);
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 = fopen("/proc/stat","r");
if (fp == NULL) {
warn("Error opening stat file");
return smprintf(UNKNOWN_STR);
}
fscanf(fp, "%*s %Lf %Lf %Lf %Lf", &a[0], &a[1], &a[2], &a[3]);
fclose(fp);
sleep(1);
fp = fopen("/proc/stat","r");
if (fp == NULL) {
warn("Error opening stat file");
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) {
warn("Could not get filesystem info");
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) {
warn("Could not get filesystem info");
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) {
warn("Could not get filesystem info");
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) {
warn("Could not get filesystem info");
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 = fopen("/proc/sys/kernel/random/entropy_avail", "r");
if (fp == NULL) {
warn("Could not open entropy file");
return smprintf(UNKNOWN_STR);
}
fscanf(fp, "%d", &entropy);
fclose(fp);
return smprintf("%d", entropy);
}
static char *
gid(void)
{
return smprintf("%d", getgid());
}
static char *
hostname(void)
{
char hostname[HOST_NAME_MAX];
FILE *fp = fopen("/proc/sys/kernel/hostname", "r");
if (fp == NULL) {
warn("Could not open hostname file");
return smprintf(UNKNOWN_STR);
}
fgets(hostname, sizeof(hostname), fp);
/* FIXME: needs improvement */
memset(&hostname[strlen(hostname)-1], '\0',
sizeof(hostname) - strlen(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) {
warn("Error getting IP address");
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) {
warnx("Error getting IP address.");
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) {
warnx("Error getting load avg.");
return smprintf(UNKNOWN_STR);
}
return smprintf("%.2f %.2f %.2f", avgs[0], avgs[1], avgs[2]);
}
static char *
ram_free(void)
{
long free;
FILE *fp = fopen("/proc/meminfo", "r");
if (fp == NULL) {
warn("Error opening meminfo file");
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 = fopen("/proc/meminfo", "r");
if (fp == NULL) {
warn("Error opening meminfo file");
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 = fopen("/proc/meminfo", "r");
if (fp == NULL) {
warn("Error opening meminfo file");
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 = fopen("/proc/meminfo", "r");
if (fp == NULL) {
warn("Error opening meminfo file");
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 = popen(command, "r");
char buffer[64];
if (fp == NULL) {
warn("Could not get command output for: %s", 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 = fopen(file, "r");
if (fp == NULL) {
warn("Could not open temperature file");
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)
{
uid_t uid = geteuid();
struct passwd *pw = getpwuid(uid);
if (pw == NULL)
return smprintf("%s", pw->pw_name);
warn("Could not get username");
return smprintf(UNKNOWN_STR);
}
static char *
uid(void)
{
return smprintf("%d", geteuid());
}
static char *
vol_perc(const char *snd_card)
{ /* thanks to botika for this function */
long int vol, max, min;
snd_mixer_t *handle;
snd_mixer_elem_t *elem;
snd_mixer_selem_id_t *s_elem;
snd_mixer_open(&handle, 0);
snd_mixer_attach(handle, "default");
snd_mixer_selem_register(handle, NULL, NULL);
snd_mixer_load(handle);
snd_mixer_selem_id_malloc(&s_elem);
snd_mixer_selem_id_set_name(s_elem, snd_card);
elem = snd_mixer_find_selem(handle, s_elem);
if (elem == NULL) {
snd_mixer_selem_id_free(s_elem);
snd_mixer_close(handle);
perror("alsa error");
return smprintf(UNKNOWN_STR);
}
snd_mixer_handle_events(handle);
snd_mixer_selem_get_playback_volume_range(elem, &min, &max);
snd_mixer_selem_get_playback_volume(elem, 0, &vol);
snd_mixer_selem_id_free(s_elem);
snd_mixer_close(handle);
return smprintf("%d", (vol * 100) / max);
}
static char *
wifi_perc(const char *wificard)
{
int strength;
char buf[255];
char *datastart;
char status[5];
FILE *fp;
ccat(3, "/sys/class/net", wificard, "/operstate");
fp = fopen(concat, "r");
if(fp == NULL) {
warn("Error opening wifi operstate file");
return smprintf(UNKNOWN_STR);
}
fgets(status, 5, fp);
fclose(fp);
if(strcmp(status, "up\n") != 0)
return smprintf(UNKNOWN_STR);
fp = fopen("/proc/net/wireless", "r");
if (fp == NULL) {
warn("Error opening wireless file");
return smprintf(UNKNOWN_STR);
}
ccat(2, wificard, ":");
fgets(buf, sizeof(buf), fp);
fgets(buf, sizeof(buf), fp);
fgets(buf, sizeof(buf), fp);
datastart = strstr(buf, concat);
if (datastart != 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 = socket(AF_INET, SOCK_DGRAM, 0);
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 == -1) {
warn("Cannot open socket for interface: %s", wificard);
return smprintf(UNKNOWN_STR);
}
wreq.u.essid.pointer = id;
if (ioctl(sockfd,SIOCGIWESSID, &wreq) == -1) {
warn("Get ESSID ioctl failed for interface %s", 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;
dpy = XOpenDisplay(NULL);
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);
warnx("Failed to format output.");
}
strlcat(status_string, element, sizeof(status_string));
free(res);
free(element);
}
XStoreName(dpy, DefaultRootWindow(dpy), status_string);
XSync(dpy, False);
}
XCloseDisplay(dpy);
return 0;
}
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