slstatus/slstatus.c

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13 KiB
C
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/* See LICENSE file for copyright and license details. */
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#include <alsa/asoundlib.h>
#include <err.h>
#include <fcntl.h>
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#include <ifaddrs.h>
#include <limits.h>
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#include <linux/wireless.h>
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#include <netdb.h>
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#include <pwd.h>
#include <signal.h>
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#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
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#include <sys/ioctl.h>
#include <sys/stat.h>
#include <sys/statvfs.h>
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#include <sys/socket.h>
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#include <sys/sysinfo.h>
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#include <sys/types.h>
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#include <time.h>
#include <unistd.h>
#include <X11/Xlib.h>
#undef strlcat
#undef strlcpy
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#include "extern/arg.h"
#include "extern/strlcat.h"
#include "extern/strlcpy.h"
#include "extern/concat.h"
struct arg {
char *(*func)();
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const char *fmt;
const char *args;
};
static char *smprintf(const char *fmt, ...);
static char *battery_perc(const char *bat);
static char *battery_state(const char *bat);
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static char *cpu_perc(void);
static char *datetime(const char *fmt);
static char *disk_free(const char *mnt);
static char *disk_perc(const char *mnt);
static char *disk_total(const char *mnt);
static char *disk_used(const char *mnt);
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static char *entropy(void);
static char *gid(void);
static char *hostname(void);
static char *ip(const char *iface);
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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 *cmd);
static char *temp(const char *file);
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static char *uid(void);
static char *uptime(void);
static char *username(void);
static char *vol_perc(const char *card);
static char *wifi_perc(const char *iface);
static char *wifi_essid(const char *iface);
static void set_status(const char *str);
static void sighandler(const int signo);
static void usage(void);
char *argv0;
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char concat[];
static unsigned short int delay;
static unsigned short int done;
static unsigned short int dflag, oflag;
static Display *dpy;
#include "config.h"
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static char *
smprintf(const char *fmt, ...)
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{
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va_list ap;
char *ret;
int len;
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va_start(ap, fmt);
len = vsnprintf(NULL, 0, fmt, ap);
va_end(ap);
ret = malloc(++len);
if (ret == NULL) {
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err(1, "malloc");
}
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va_start(ap, fmt);
vsnprintf(ret, len, fmt, ap);
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va_end(ap);
return ret;
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}
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static char *
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battery_perc(const char *bat)
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{
int perc;
FILE *fp;
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ccat(3, "/sys/class/power_supply/", bat, "/capacity");
fp = fopen(concat, "r");
if (fp == NULL) {
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warn("Failed to open file %s", concat);
return smprintf(UNKNOWN_STR);
}
fscanf(fp, "%i", &perc);
fclose(fp);
return smprintf("%d%%", perc);
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}
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static char *
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battery_state(const char *bat)
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{
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char state[12];
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FILE *fp;
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ccat(3, "/sys/class/power_supply/", bat, "/status");
fp = fopen(concat, "r");
if (fp == NULL) {
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warn("Failed to open file %s", concat);
return smprintf(UNKNOWN_STR);
}
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fscanf(fp, "%12s", state);
fclose(fp);
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if (strcmp(state, "Charging") == 0) {
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return smprintf("+");
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} else if (strcmp(state, "Discharging") == 0) {
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return smprintf("-");
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} else if (strcmp(state, "Full") == 0) {
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return smprintf("=");
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} else {
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return smprintf("?");
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}
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}
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static char *
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cpu_perc(void)
{
int perc;
long double a[4], b[4];
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FILE *fp;
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fp = fopen("/proc/stat", "r");
if (fp == NULL) {
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warn("Failed to open file /proc/stat");
return smprintf(UNKNOWN_STR);
}
fscanf(fp, "%*s %Lf %Lf %Lf %Lf", &a[0], &a[1], &a[2], &a[3]);
fclose(fp);
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delay = (UPDATE_INTERVAL - (UPDATE_INTERVAL - 1));
sleep(delay);
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fp = fopen("/proc/stat", "r");
if (fp == NULL) {
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warn("Failed to open file /proc/stat");
return smprintf(UNKNOWN_STR);
}
fscanf(fp, "%*s %Lf %Lf %Lf %Lf", &b[0], &b[1], &b[2], &b[3]);
fclose(fp);
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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]));
return smprintf("%d%%", perc);
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}
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static char *
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datetime(const char *fmt)
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{
time_t t;
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char str[80];
t = time(NULL);
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if (strftime(str, sizeof(str), fmt, localtime(&t)) == 0) {
return smprintf(UNKNOWN_STR);
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}
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return smprintf("%s", str);
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}
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static char *
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disk_free(const char *mnt)
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{
struct statvfs fs;
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if (statvfs(mnt, &fs) < 0) {
warn("Failed to get filesystem info");
return smprintf(UNKNOWN_STR);
}
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return smprintf("%f", (float)fs.f_bsize * (float)fs.f_bfree / 1024 / 1024 / 1024);
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}
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static char *
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disk_perc(const char *mnt)
{
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int perc;
struct statvfs fs;
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if (statvfs(mnt, &fs) < 0) {
warn("Failed to get filesystem info");
return smprintf(UNKNOWN_STR);
}
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perc = 100 * (1.0f - ((float)fs.f_bfree / (float)fs.f_blocks));
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return smprintf("%d%%", perc);
}
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static char *
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disk_total(const char *mnt)
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{
struct statvfs fs;
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if (statvfs(mnt, &fs) < 0) {
warn("Failed to get filesystem info");
return smprintf(UNKNOWN_STR);
}
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return smprintf("%f", (float)fs.f_bsize * (float)fs.f_blocks / 1024 / 1024 / 1024);
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}
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static char *
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disk_used(const char *mnt)
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{
struct statvfs fs;
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if (statvfs(mnt, &fs) < 0) {
warn("Failed to get filesystem info");
return smprintf(UNKNOWN_STR);
}
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return smprintf("%f", (float)fs.f_bsize * ((float)fs.f_blocks - (float)fs.f_bfree) / 1024 / 1024 / 1024);
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}
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static char *
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entropy(void)
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{
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int num;
FILE *fp;
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fp= fopen("/proc/sys/kernel/random/entropy_avail", "r");
if (fp == NULL) {
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warn("Failed to open file /proc/sys/kernel/random/entropy_avail");
return smprintf(UNKNOWN_STR);
}
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fscanf(fp, "%d", &num);
fclose(fp);
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return smprintf("%d", num);
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}
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static char *
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gid(void)
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{
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return smprintf("%d", getgid());
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}
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static char *
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hostname(void)
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{
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char buf[HOST_NAME_MAX];
FILE *fp;
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if (gethostname(buf, sizeof(buf)) == -1) {
warn(1, "hostname");
return smprintf(UNKNOWN_STR);
}
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return smprintf("%s", buf);
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}
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static char *
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ip(const char *iface)
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{
struct ifaddrs *ifaddr, *ifa;
int s;
char host[NI_MAXHOST];
if (getifaddrs(&ifaddr) == -1) {
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warn("Failed to get IP address for interface %s", iface);
return smprintf(UNKNOWN_STR);
}
for (ifa = ifaddr; ifa != NULL; ifa = ifa->ifa_next) {
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if (ifa->ifa_addr == NULL) {
continue;
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}
s = getnameinfo(ifa->ifa_addr, sizeof(struct sockaddr_in), host, NI_MAXHOST, NULL, 0, NI_NUMERICHOST);
if ((strcmp(ifa->ifa_name, iface) == 0) && (ifa->ifa_addr->sa_family == AF_INET)) {
if (s != 0) {
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warnx("Failed to get IP address for interface %s", iface);
return smprintf(UNKNOWN_STR);
}
return smprintf("%s", host);
}
}
freeifaddrs(ifaddr);
return smprintf(UNKNOWN_STR);
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}
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static char *
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load_avg(void)
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{
double avgs[3];
if (getloadavg(avgs, 3) < 0) {
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warnx("Failed to get the load avg");
return smprintf(UNKNOWN_STR);
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}
return smprintf("%.2f %.2f %.2f", avgs[0], avgs[1], avgs[2]);
}
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static char *
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ram_free(void)
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{
long free;
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FILE *fp;
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fp = fopen("/proc/meminfo", "r");
if (fp == NULL) {
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warn("Failed to open file /proc/meminfo");
return smprintf(UNKNOWN_STR);
}
fscanf(fp, "MemFree: %ld kB\n", &free);
fclose(fp);
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return smprintf("%f", (float)free / 1024 / 1024);
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}
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static char *
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ram_perc(void)
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{
long total, free, buffers, cached;
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FILE *fp;
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fp = fopen("/proc/meminfo", "r");
if (fp == NULL) {
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warn("Failed to open file /proc/meminfo");
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);
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return smprintf("%d%%", 100 * ((total - free) - (buffers + cached)) / total);
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}
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static char *
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ram_total(void)
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{
long total;
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FILE *fp;
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fp = fopen("/proc/meminfo", "r");
if (fp == NULL) {
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warn("Failed to open file /proc/meminfo");
return smprintf(UNKNOWN_STR);
}
fscanf(fp, "MemTotal: %ld kB\n", &total);
fclose(fp);
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return smprintf("%f", (float)total / 1024 / 1024);
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}
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static char *
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ram_used(void)
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{
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long free, total, buffers, cached;
FILE *fp;
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fp = fopen("/proc/meminfo", "r");
if (fp == NULL) {
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warn("Failed to open file /proc/meminfo");
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);
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return smprintf("%f", (float)(total - free - buffers - cached) / 1024 / 1024);
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}
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static char *
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run_command(const char *cmd)
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{
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FILE *fp;
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char buf[64] = "n/a";
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fp = popen(cmd, "r");
if (fp == NULL) {
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warn("Failed to get command output for %s", cmd);
return smprintf(UNKNOWN_STR);
}
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fgets(buf, sizeof(buf), fp);
buf[sizeof(buf)-1] = '\0';
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pclose(fp);
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return smprintf("%s", buf);
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}
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static char *
temp(const char *file)
{
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int temp;
FILE *fp;
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fp = fopen(file, "r");
if (fp == NULL) {
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warn("Failed to open file %s", file);
return smprintf(UNKNOWN_STR);
}
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fscanf(fp, "%d", &temp);
fclose(fp);
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return smprintf("%d°C", temp / 1000);
}
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static char *
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uptime(void)
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{
struct sysinfo info;
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int h = 0;
int m = 0;
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sysinfo(&info);
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h = info.uptime / 3600;
m = (info.uptime - h * 3600 ) / 60;
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return smprintf("%dh %dm", h, m);
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}
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static char *
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username(void)
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{
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uid_t uid = geteuid();
struct passwd *pw = getpwuid(uid);
if (pw == NULL) {
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warn("Failed to get username");
return smprintf(UNKNOWN_STR);
}
return smprintf("%s", pw->pw_name);
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}
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static char *
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uid(void)
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{
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return smprintf("%d", geteuid());
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}
static char *
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vol_perc(const char *card)
{
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);
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snd_mixer_attach(handle, card);
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, "Master");
elem = snd_mixer_find_selem(handle, s_elem);
if (elem == NULL) {
snd_mixer_selem_id_free(s_elem);
snd_mixer_close(handle);
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warn("Failed to get volume percentage for %s", card);
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);
if (max == 0)
return smprintf("%d%%", 0);
else
return smprintf("%d%%", ((uint_fast16_t)(vol * 100) / max));
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}
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static char *
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wifi_perc(const char *iface)
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{
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int perc;
char buf[255];
char *datastart;
char status[5];
FILE *fp;
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ccat(3, "/sys/class/net/", iface, "/operstate");
fp = fopen(concat, "r");
if (fp == NULL) {
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warn("Failed to open file %s", concat);
return smprintf(UNKNOWN_STR);
}
fgets(status, 5, fp);
fclose(fp);
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if(strcmp(status, "up\n") != 0) {
return smprintf(UNKNOWN_STR);
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}
fp = fopen("/proc/net/wireless", "r");
if (fp == NULL) {
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warn("Failed to open file /proc/net/wireless");
return smprintf(UNKNOWN_STR);
}
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ccat(2, iface, ":");
fgets(buf, sizeof(buf), fp);
fgets(buf, sizeof(buf), fp);
fgets(buf, sizeof(buf), fp);
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fclose(fp);
datastart = strstr(buf, concat);
if (datastart != NULL) {
datastart = strstr(buf, ":");
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sscanf(datastart + 1, " %*d %d %*d %*d %*d %*d %*d %*d %*d %*d", &perc);
}
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return smprintf("%d%%", perc);
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}
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static char *
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wifi_essid(const char *iface)
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{
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;
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sprintf(wreq.ifr_name, iface);
if (sockfd == -1) {
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warn("Failed to get ESSID for interface %s", iface);
return smprintf(UNKNOWN_STR);
}
wreq.u.essid.pointer = id;
if (ioctl(sockfd,SIOCGIWESSID, &wreq) == -1) {
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warn("Failed to get ESSID for interface %s", iface);
return smprintf(UNKNOWN_STR);
}
close(sockfd);
if (strcmp((char *)wreq.u.essid.pointer, "") == 0)
return smprintf(UNKNOWN_STR);
else
return smprintf("%s", (char *)wreq.u.essid.pointer);
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}
static void
set_status(const char *str)
{
XStoreName(dpy, DefaultRootWindow(dpy), str);
XSync(dpy, False);
}
static void
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sighandler(const int signo)
{
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if (signo == SIGTERM || signo == SIGINT) {
done = 1;
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}
}
static void
usage(void)
{
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fprintf(stderr, "usage: %s [-dhov]\n", argv0);
exit(1);
}
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int
main(int argc, char *argv[])
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{
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unsigned short int i;
char status_string[4096];
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char *res, *element;
struct arg argument;
struct sigaction act;
ARGBEGIN {
case 'd':
dflag = 1;
break;
case 'o':
oflag = 1;
break;
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case 'v':
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printf("slstatus %s (C) 2016 slstatus engineers\n", VERSION);
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return 0;
default:
usage();
} ARGEND
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if (dflag && oflag) {
usage();
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}
if (dflag) {
(void)daemon(1, 1);
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}
memset(&act, 0, sizeof(act));
act.sa_handler = sighandler;
sigaction(SIGINT, &act, 0);
sigaction(SIGTERM, &act, 0);
if (!oflag) {
dpy = XOpenDisplay(NULL);
}
while (!done) {
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status_string[0] = '\0';
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for (i = 0; i < sizeof(args) / sizeof(args[0]); ++i) {
argument = args[i];
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if (argument.args == NULL) {
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res = argument.func();
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} else {
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res = argument.func(argument.args);
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}
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element = smprintf(argument.fmt, res);
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if (element == NULL) {
element = smprintf(UNKNOWN_STR);
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warnx("Failed to format output");
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}
strlcat(status_string, element, sizeof(status_string));
free(res);
free(element);
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}
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if (!oflag) {
set_status(status_string);
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} else {
printf("%s\n", status_string);
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}
/*
* subtract delay time spend in function
* calls from the actual global delay time
*/
sleep(UPDATE_INTERVAL - delay);
delay = 0;
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}
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if (!oflag) {
set_status(NULL);
XCloseDisplay(dpy);
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}
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return 0;
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}