X-Git-Url: https://git.xinqibao.xyz/slstatus.git/blobdiff_plain/94ea78f0fe394fc6b42dc0d83be9abf3d1c77ea0..d4d2646f6387f0245ce1e285382f85b2cb6c0300:/slstatus.c

diff --git a/slstatus.c b/slstatus.c
index 77f900d..23ed940 100644
--- a/slstatus.c
+++ b/slstatus.c
@@ -1,106 +1,124 @@
 /* See LICENSE file for copyright and license details. */
 
+/* global libraries */
 #include <alsa/asoundlib.h>
+#include <fcntl.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <sys/types.h>
+#include <sys/stat.h>
 #include <time.h>
 #include <unistd.h>
 #include <X11/Xlib.h>
 
+/* local libraries */
 #include "config.h"
 
-char *smprintf(char *fmt, ...);
-
-void *setstatus(char *str);
-
-char *wifi_signal();
-char *battery();
-char *cpu_usage();
-char *cpu_temperature();
-char *ram_usage();
-char *volume();
-char *datetime();
+/* check file macro */
+#define CHECK_FILE(X,Y) do { \
+    if (stat(X,&Y) < 0) return -1; \
+    if (!S_ISREG(Y.st_mode)) return -1; \
+} while (0);
 
+/* functions */
+int config_check();
+void setstatus(char *str);
+char *smprintf(char *fmt, ...);
+char *get_battery();
+char *get_cpu_temperature();
+char *get_cpu_usage();
+char *get_datetime();
+char *get_ram_usage();
+char *get_volume();
+char *get_wifi_signal();
+
+/* global variables */
 static Display *dpy;
 
-/* smprintf function */
-char *
-smprintf(char *fmt, ...)
+/* check configured paths */
+int
+config_check()
 {
-	va_list fmtargs;
-	char *ret;
-	int len;
-
-	va_start(fmtargs, fmt);
-	len = vsnprintf(NULL, 0, fmt, fmtargs);
-	va_end(fmtargs);
+    struct stat fs;
 
-	ret = malloc(++len);
-	if (ret == NULL) {
-		fprintf(stderr, "Malloc error.");
-		exit(1);
-	}
+    /* check all files in the config.h file */
+    CHECK_FILE(batterynowfile, fs);
+    CHECK_FILE(batteryfullfile, fs);
+    CHECK_FILE(tempfile, fs);
 
-	va_start(fmtargs, fmt);
-	vsnprintf(ret, len, fmt, fmtargs);
-	va_end(fmtargs);
+    /* check update interval */
+    if (update_interval < 1)
+        return -1;
 
-	return ret;
+    /* exit successfully */
+    return 0;
 }
 
 /* set statusbar (WM_NAME) */
 void
 setstatus(char *str)
 {
-	XStoreName(dpy, DefaultRootWindow(dpy), str);
-	XSync(dpy, False);
+    XStoreName(dpy, DefaultRootWindow(dpy), str);
+    XSync(dpy, False);
 }
 
-/* alsa volume percentage */
+/* smprintf function */
+char *
+smprintf(char *fmt, ...)
+{
+    va_list fmtargs;
+    char *ret = NULL;
+    va_start(fmtargs, fmt);
+    if (vasprintf(&ret, fmt, fmtargs) < 0)
+        return NULL;
+    va_end(fmtargs);
+
+    return ret;
+}
+
+/* battery percentage */
 char *
-volume()
+get_battery()
 {
-        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);
-        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);
-        
-        if (!mute)
-            return "mute";
-        else
-            return smprintf("%d%%", (vol * 100) / max);
+    int now, full, perc;
+    FILE *fp;
+
+    /* open battery now file */
+    if (!(fp = fopen(batterynowfile, "r"))) {
+        fprintf(stderr, "Error opening battery file.");
+        return smprintf("n/a");
+    }
+
+    /* read value */
+    fscanf(fp, "%i", &now);
+
+    /* close battery now file */
+    fclose(fp);
+
+    /* open battery full file */
+    if (!(fp = fopen(batteryfullfile, "r"))) {
+        fprintf(stderr, "Error opening battery file.");
+        return smprintf("n/a");
+    }
+
+    /* read value */
+    fscanf(fp, "%i", &full);
+
+    /* close battery full file */
+    fclose(fp);
+
+    /* calculate percent */
+    perc = now / (full / 100);
+
+    /* return perc as string */
+    return smprintf("%d%%", perc);
 }
 
 /* cpu temperature */
 char *
-cpu_temperature()
+get_cpu_temperature()
 {
     int temperature;
     FILE *fp;
@@ -108,195 +126,266 @@ cpu_temperature()
     /* open temperature file */
     if (!(fp = fopen(tempfile, "r"))) {
         fprintf(stderr, "Could not open temperature file.\n");
-        exit(1);
+        return smprintf("n/a");
     }
 
-    /* extract temperature, close file */
+    /* extract temperature */
     fscanf(fp, "%d", &temperature);
+
+    /* close temperature file */
     fclose(fp);
 
     /* return temperature in degrees */
     return smprintf("%d°C", temperature / 1000);
 }
 
-/* wifi percentage */
+/* cpu percentage */
 char *
-wifi_signal()
+get_cpu_usage()
 {
-    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];
-	FILE *fp;
-
-    /* generate the path name */
-    strcat(path, path_start);
-    strcat(path, wificard);
-    strcat(path, path_end);
+    int perc;
+    long double a[4], b[4];
+    FILE *fp;
 
-    /* open wifi file, extract status, close file */
-    if(!(fp = fopen(path, "r"))) {
-        fprintf(stderr, "Error opening wifi operstate file.");
-        exit(1);
+    /* open stat file */
+    if (!(fp = fopen("/proc/stat","r"))) {
+        fprintf(stderr, "Error opening stat file.");
+        return smprintf("n/a");
     }
-    char status[5];
-    fgets(status, 5, fp);
-    fclose(fp);
 
-    /* check if interface down */
-    if(strcmp(status, "up\n") != 0){
-        return "n/a";
-    }
+    /* read values */
+    fscanf(fp, "%*s %Lf %Lf %Lf %Lf", &a[0], &a[1], &a[2], &a[3]);
 
-    /* open wifi file */
-    if (!(fp = fopen("/proc/net/wireless", "r"))) {
-        fprintf(stderr, "Error opening wireless file.");
-        exit(1);
-    }
+    /* close stat file */
+    fclose(fp);
 
-    /* extract the signal strength and close the file */
-	fgets(buf, bufsize, fp);
-	fgets(buf, bufsize, fp);
-	fgets(buf, bufsize, fp);
-	if ((datastart = strstr(buf, "wlp3s0:")) != NULL) {
-		datastart = strstr(buf, ":");
-		sscanf(datastart + 1, " %*d   %d  %*d  %*d        %*d      %*d      %*d      %*d      %*d        %*d",
-	           &strength);
-	}
-	fclose(fp);
+    /* wait a second (for avg values) */
+    sleep(1);
 
-    /* return strength in percent */
-    return smprintf("%d%%", strength);
-}
+    /* open stat file */
+    if (!(fp = fopen("/proc/stat","r"))) {
+        fprintf(stderr, "Error opening stat file.");
+        return smprintf("n/a");
+    }
 
-/* battery percentage */
-char *
-battery()
-{
-	int batt_now;
-    int batt_full;
-    int batt_perc;
-	FILE *fp;
+    /* read values */
+    fscanf(fp, "%*s %Lf %Lf %Lf %Lf", &b[0], &b[1], &b[2], &b[3]);
 
-    /* open battery now file, extract and close */
-	if (!(fp = fopen(batterynowfile, "r"))) {
-        fprintf(stderr, "Error opening battery file.");
-        exit(1);
-    }
-	fscanf(fp, "%i", &batt_now);
-	fclose(fp);
-	
-    /* extract battery full file, extract and close */
-	if (!(fp = fopen(batteryfullfile, "r"))) {
-        fprintf(stderr, "Error opening battery file.");
-        exit(1);
-    }
-	fscanf(fp, "%i", &batt_full);
-	fclose(fp);
+    /* close stat file */
+    fclose(fp);
 
-    /* calculate percent */
-	batt_perc = batt_now / (batt_full / 100);
+    /* calculate avg in this second */
+    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 percent */
-	return smprintf("%d%%", batt_perc);
+    /* return perc as string */
+    return smprintf("%d%%", perc);
 }
 
 /* date and time */
 char *
-datetime()
+get_datetime()
 {
-	time_t tm;
-	size_t bufsize = 19;
-	char *buf = malloc(bufsize);
+    time_t tm;
+    size_t bufsize = 64;
+    char *buf = malloc(bufsize);
 
     /* get time in format */
-	time(&tm);
-	if(!strftime(buf, bufsize, timeformat, localtime(&tm))) {
-		fprintf(stderr, "Strftime failed.\n");
-		exit(1);
-	}
+    time(&tm);
+    if(!strftime(buf, bufsize, timeformat, localtime(&tm))) {
+        fprintf(stderr, "Strftime failed.\n");
+        return smprintf("n/a");
+    }
 
     /* return time */
-	return buf;
+    return smprintf("%s", buf);
 }
 
-/* cpu percentage */
+/* ram percentage */
 char *
-cpu_usage()
+get_ram_usage()
 {
+    int perc;
+    long total, free, buffers, cached;
     FILE *fp;
-    long double a[4], b[4], cpu_perc;
 
-    /* open stat file, read and close, do same after 1 second */
-	if (!(fp = fopen("/proc/stat","r"))) {
-        fprintf(stderr, "Error opening stat file.");
-        exit(1);
-    }
-    fscanf(fp,"%*s %Lf %Lf %Lf %Lf",&a[0],&a[1],&a[2],&a[3]);
-    fclose(fp);
-    sleep(1);
-	if (!(fp = fopen("/proc/stat","r"))) {
-        fprintf(stderr, "Error opening stat file.");
-        exit(1);
+    /* open meminfo file */
+    if (!(fp = fopen("/proc/meminfo", "r"))) {
+        fprintf(stderr, "Error opening meminfo file.");
+        return smprintf("n/a");
     }
-    fscanf(fp,"%*s %Lf %Lf %Lf %Lf",&b[0],&b[1],&b[2],&b[3]);
+
+    /* read the values */
+    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);
+
+    /* close meminfo file */
     fclose(fp);
 
-    /* calculate average in 1 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]));
+    /* calculate percentage */
+    perc = 100 * ((total - free) - (buffers + cached)) / total;
 
-    /* return avg cpu percentage */
-    return smprintf("%d%%", (int)cpu_perc);
+    /* return perc as string */
+    return smprintf("%d%%", perc);
 }
 
-/* ram percentage */
+/* alsa volume percentage */
 char *
-ram_usage()
+get_volume()
 {
+    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);
+}
+
+/* wifi percentage */
+char *
+get_wifi_signal()
+{
+    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;
-    long total, free, available;
-    int ram_perc;
 
-    /* read meminfo file, extract and close */
-	if (!(fp = fopen("/proc/meminfo", "r"))) {
-        fprintf(stderr, "Error opening meminfo file.");
-        exit(1);
+    /* 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.");
+        return smprintf("n/a");
     }
-    fscanf(fp, "MemTotal: %ld kB\n", &total);
-    fscanf(fp, "MemFree: %ld kB\n", &free);
-    fscanf(fp, "MemAvailable: %ld kB\n", &available);
+
+    /* read the status */
+    fgets(status, 5, fp);
+
+    /* close wifi file */
     fclose(fp);
 
-    /* calculate percentage */
-    ram_perc = 100 * (total - available) / total;
+    /* check if interface down */
+    if(strcmp(status, "up\n") != 0){
+        return smprintf("n/a");
+    }
 
-    /* return in percent */
-    return smprintf("%d%%",ram_perc);
+    /* open wifi file */
+    if (!(fp = fopen("/proc/net/wireless", "r"))) {
+        fprintf(stderr, "Error opening wireless file.");
+        return smprintf("n/a");
+    }
+
+    /* 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);
 }
 
+/* main function */
 int
 main()
 {
     char status[1024];
+    char *battery = NULL;
+    char *cpu_temperature = NULL;
+    char *cpu_usage = NULL;
+    char *datetime = NULL;
+    char *ram_usage = NULL;
+    char *volume = NULL;
+    char *wifi_signal = NULL;
+
+    /* check config for sanity */
+    if (config_check() < 0) {
+        fprintf(stderr, "Config error, please check paths and interval and recompile!\n");
+        exit(1);
+    }
 
     /* open display */
-    if (( dpy = XOpenDisplay(0x0)) == NULL ) {
+    if (!(dpy = XOpenDisplay(0x0))) {
         fprintf(stderr, "Cannot open display!\n");
         exit(1);
     }
 
-    /* return status every second */	
-	for (;;) {
-		sprintf(status, FORMATSTRING, ARGUMENTS);
-		setstatus(status);
-	}
+    /* return status every second */
+    for (;;) {
+        /* assign the values */
+        battery = get_battery();
+        cpu_temperature = get_cpu_temperature();
+        cpu_usage = get_cpu_usage();
+        datetime = get_datetime();
+        ram_usage = get_ram_usage();
+        volume = get_volume();
+        wifi_signal = get_wifi_signal();
+
+        /* return the status */
+        sprintf(status, FORMATSTRING, ARGUMENTS);
+        setstatus(status);
+
+        /* free the values */
+        free(battery);
+        free(cpu_temperature);
+        free(cpu_usage);
+        free(datetime);
+        free(ram_usage);
+        free(volume);
+        free(wifi_signal);
+
+        /* wait, "update_interval - 1" because of get_cpu_usage() which uses 1 second */
+        sleep(update_interval -1);
+    }
 
     /* close display */
     XCloseDisplay(dpy);
 
     /* exit successfully */
-	return 0;
+    return 0;
 }