Update README todo

[slstatus.git] / slstatus.c

diff --git a/slstatus.c b/slstatus.c
index 467d32e..b05d915 100644 (file)
--- a/slstatus.c
+++ b/slstatus.c
@@ -1,363 +1,125 @@
 /* See LICENSE file for copyright and license details. */
 /* See LICENSE file for copyright and license details. */

-
-/* global libraries */
-#include <alsa/asoundlib.h>
-#include <stdarg.h>
+#include <locale.h>
+#include <signal.h>

 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <time.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <time.h>

-#include <unistd.h>

 #include <X11/Xlib.h>
 
 #include <X11/Xlib.h>
 

-/* local libraries */
-#include "config.h"
+#include "arg.h"
+#include "slstatus.h"
+#include "util.h"

 
 

-/* functions */
-void setstatus(char *str);
-char *battery();
-char *cpu_temperature();
-char *cpu_usage();
-char *datetime();
-char *ram_usage();
-char *smprintf(char *fmt, ...);
-char *volume();
-char *wifi_signal();
+struct arg {
+       const char *(*func)();
+       const char *fmt;
+       const char *args;
+};

 
 

-/* global variables */
+char *argv0;
+char buf[1024];
+static unsigned short int done;

 static Display *dpy;
 
 static Display *dpy;
 

-/* set statusbar (WM_NAME) */
-void
-setstatus(char *str)
-{
-  XStoreName(dpy, DefaultRootWindow(dpy), str);
-  XSync(dpy, False);
-}
-
-/* battery percentage */
-char *
-battery()
-{
-  int battery_now, battery_full, battery_perc;
-  FILE *fp;
-
-  /* open battery now file */
-  if (!(fp = fopen(batterynowfile, "r"))) {
-    fprintf(stderr, "Error opening battery file.");
-    exit(1);
-  }
-
-  /* read value */
-  fscanf(fp, "%i", &battery_now);
-
-  /* close battery now file */
-  fclose(fp);
-
-  /* open battery full file */
-  if (!(fp = fopen(batteryfullfile, "r"))) {
-    fprintf(stderr, "Error opening battery file.");
-    exit(1);
-  }
-
-  /* read value */
-  fscanf(fp, "%i", &battery_full);
-
-  /* close battery full file */
-  fclose(fp);
-
-  /* calculate percent */
-  battery_perc = battery_now / (battery_full / 100);
-
-  /* return batt_perc as string */
-  return smprintf("%d%%", battery_perc);
-}
-
-/* cpu temperature */
-char *
-cpu_temperature()
-{
-  int temperature;
-  FILE *fp;
-
-  /* open temperature file */
-  if (!(fp = fopen(tempfile, "r"))) {
-    fprintf(stderr, "Could not open temperature file.\n");
-    exit(1);
-  }
-
-  /* extract temperature */
-  fscanf(fp, "%d", &temperature);
-
-  /* close temperature file */
-  fclose(fp);
-
-  /* return temperature in degrees */
-  return smprintf("%d°C", temperature / 1000);
-}
-
-/* cpu percentage */
-char *
-cpu_usage()
-{
-  int cpu_perc;
-  long double a[4], b[4];
-  FILE *fp;
-
-  /* open stat file */
-  if (!(fp = fopen("/proc/stat","r"))) {
-    fprintf(stderr, "Error opening stat file.");
-    exit(1);
-  }
-
-  /* read values */
-  fscanf(fp, "%*s %Lf %Lf %Lf %Lf", &a[0], &a[1], &a[2], &a[3]);
-
-  /* close stat file */
-  fclose(fp);
-
-  /* wait a second (for avg values) */
-  sleep(1);
-
-  /* open stat file */
-  if (!(fp = fopen("/proc/stat","r"))) {
-    fprintf(stderr, "Error opening stat file.");
-    exit(1);
-  }
-
-  /* read values */
-  fscanf(fp, "%*s %Lf %Lf %Lf %Lf", &b[0], &b[1], &b[2], &b[3]);
-
-  /* close stat file */
-  fclose(fp);
-
-  /* calculate avg in this second */
-  cpu_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 cpu_perc as string */
-  return smprintf("%d%%", cpu_perc);
-}
-
-/* date and time */
-char *
-datetime()
-{
-  time_t tm;
-  size_t bufsize = 19;
-  char *buf = malloc(bufsize);
-
-  /* get time in format */
-  time(&tm);
-  if(!strftime(buf, bufsize, timeformat, localtime(&tm))) {
-    fprintf(stderr, "Strftime failed.\n");
-    exit(1);
-  }
-
-  /* return time */
-  return buf;
-}
-
-/* ram percentage */
-char *
-ram_usage()
-{
-  int ram_perc;
-  long total, free, available;
-  FILE *fp;
-
-  /* open meminfo file */
-  if (!(fp = fopen("/proc/meminfo", "r"))) {
-    fprintf(stderr, "Error opening meminfo file.");
-    exit(1);
-  }
-
-  /* read the values */
-  fscanf(fp, "MemTotal: %ld kB\n", &total);
-  fscanf(fp, "MemFree: %ld kB\n", &free);
-  fscanf(fp, "MemAvailable: %ld kB\n", &available);
-
-  /* close meminfo file */
-  fclose(fp);
-
-  /* calculate percentage */
-  ram_perc = 100 * (total - available) / total;
-
-  /* return ram_perc as string */
-  return smprintf("%d%%",ram_perc);
-}
+#include "config.h"

 
 

-/* smprintf function */
-char *
-smprintf(char *fmt, ...)
+static void
+terminate(const int signo)

 {
 {

-  va_list fmtargs;
-  char *ret;
-  int len;
-
-  va_start(fmtargs, fmt);
-  len = vsnprintf(NULL, 0, fmt, fmtargs);
-  va_end(fmtargs);
-
-  ret = malloc(++len);
-  if (ret == NULL) {
-    fprintf(stderr, "Malloc error.");
-    exit(1);
-  }
-
-  va_start(fmtargs, fmt);
-  vsnprintf(ret, len, fmt, fmtargs);
-  va_end(fmtargs);
+       (void)signo;

 
 

-  return ret;
+       done = 1;

 }
 
 }
 

-/* alsa volume percentage */
-char *
-volume()
+static void
+difftimespec(struct timespec *res, struct timespec *a, struct timespec *b)

 {
 {

-  int mute = 0;
-  long vol = 0, max = 0, min = 0;
-
-  /* get volume from alsa */
-  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);
-  snd_mixer_selem_id_set_name(vol_info, channel);
-  snd_mixer_selem_id_set_name(mute_info, 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);
-
-  /* return the string (mute) */
-  if (!mute)
-    return smprintf("mute");
-  else
-    return smprintf("%d%%", (vol * 100) / max);
+       res->tv_sec = a->tv_sec - b->tv_sec - (a->tv_nsec < b->tv_nsec);
+       res->tv_nsec = a->tv_nsec - b->tv_nsec +
+                      (a->tv_nsec < b->tv_nsec) * 1000000000;

 }
 
 }
 

-/* wifi percentage */
-char *
-wifi_signal()
+static void
+usage(void)

 {
 {

-  int bufsize = 255;
-  int strength;
-  char buf[bufsize];
-  char *datastart;
-  char path_start[16] = "/sys/class/net/";
-  char path_end[11] = "/operstate";
-  char path[32];
-  char status[5];
-  char needle[sizeof wificard + 1];
-  FILE *fp;
-
-  /* generate the path name */
-
-  memset(path, 0, sizeof path);
-  strcat(path, path_start);
-  strcat(path, wificard);
-  strcat(path, path_end);
-
-  /* open wifi file */
-  if(!(fp = fopen(path, "r"))) {
-    fprintf(stderr, "Error opening wifi operstate file.");
-    exit(1);
-  }
-
-  /* read the status */
-  fgets(status, 5, fp);
-
-  /* close wifi file */
-  fclose(fp);
-
-  /* check if interface down */
-  if(strcmp(status, "up\n") != 0){
-    return "n/a";
-  }
-
-  /* open wifi file */
-  if (!(fp = fopen("/proc/net/wireless", "r"))) {
-    fprintf(stderr, "Error opening wireless file.");
-    exit(1);
-  }
-
-  /* extract the signal strength */
-  strcpy(needle, wificard);
-  strcat(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);
-  }
-
-  /* close wifi file */
-  fclose(fp);
-
-  /* return strength in percent */
-  return smprintf("%d%%", strength);
+       fprintf(stderr, "usage: %s [-s]\n", argv0);
+       exit(1);

 }
 
 }
 

-/* main function */

 int
 int

-main()
+main(int argc, char *argv[])

 {
 {

-  char status[1024];
-
-  /* open display */
-  if (!(dpy = XOpenDisplay(0x0))) {
-    fprintf(stderr, "Cannot open display!\n");
-    exit(1);
-  }
-
-  char *pWifi_signal = NULL;
-  char *pBattery = NULL;
-  char *pCpu_usage = NULL;
-  char *pCpu_temperature = NULL;
-  char *pRam_usage = NULL;
-  char *pVolume = NULL;
-  char *pDatetime = NULL;
-
-  /* return status every second */
-  for (;;) {
-    pWifi_signal = wifi_signal();
-    pBattery = battery();
-    pCpu_usage = cpu_usage();
-    pCpu_temperature = cpu_temperature();
-    pRam_usage = ram_usage();
-    pVolume = volume();
-    pDatetime = datetime();
-    sprintf(status, FORMATSTRING, ARGUMENTS);
-    setstatus(status);
-    free(pWifi_signal);
-    free(pBattery);
-    free(pCpu_usage);
-    free(pCpu_temperature);
-    free(pRam_usage);
-    free(pVolume);
-    free(pDatetime);
-  }
-
-  /* close display */
-  XCloseDisplay(dpy);
-
-  /* exit successfully */
-  return 0;
+       struct sigaction act;
+       struct timespec start, current, diff, intspec, wait;
+       size_t i, len;
+       int sflag = 0;
+       char status[MAXLEN];
+
+       ARGBEGIN {
+               case 's':
+                       sflag = 1;
+                       break;
+               default:
+                       usage();
+       } ARGEND
+
+       if (argc) {
+               usage();
+       }
+
+       setlocale(LC_ALL, "");
+
+       memset(&act, 0, sizeof(act));
+       act.sa_handler = terminate;
+       sigaction(SIGINT,  &act, NULL);
+       sigaction(SIGTERM, &act, NULL);
+
+       if (!sflag && !(dpy = XOpenDisplay(NULL))) {
+               fprintf(stderr, "Cannot open display");
+               return 1;
+       }
+
+       while (!done) {
+               clock_gettime(CLOCK_MONOTONIC, &start);
+
+               status[0] = '\0';
+               for (i = len = 0; i < LEN(args); i++) {
+                       const char * res = args[i].func(args[i].args);
+                       res = (res == NULL) ? unknown_str : res;
+                       len += snprintf(status + len, sizeof(status) - len,
+                                       args[i].fmt, res);
+
+                       if (len >= sizeof(status)) {
+                               status[sizeof(status) - 1] = '\0';
+                       }
+               }
+
+               if (sflag) {
+                       printf("%s\n", status);
+               } else {
+                       XStoreName(dpy, DefaultRootWindow(dpy), status);
+                       XSync(dpy, False);
+               }
+
+               if (!done) {
+                       clock_gettime(CLOCK_MONOTONIC, &current);
+                       difftimespec(&diff, &current, &start);
+
+                       intspec.tv_sec = interval / 1000;
+                       intspec.tv_nsec = (interval % 1000) * 1000000;
+                       difftimespec(&wait, &intspec, &diff);
+
+                       if (wait.tv_sec >= 0) {
+                               nanosleep(&wait, NULL);
+                       }
+               }
+       }
+
+       if (!sflag) {
+               XStoreName(dpy, DefaultRootWindow(dpy), NULL);
+               XCloseDisplay(dpy);
+       }
+
+       return 0;

 }
 }