X-Git-Url: https://git.xinqibao.xyz/slstatus.git/blobdiff_plain/12521e4e10cbfadc2fd42d32de101652490bf5b3..6624985cf4537440cb6403e319d16ce83bee43f2:/slstatus.c

diff --git a/slstatus.c b/slstatus.c
index cb6282f..75413a1 100644
--- a/slstatus.c
+++ b/slstatus.c
@@ -2,10 +2,15 @@
 
 /* global libraries */
 #include <alsa/asoundlib.h>
+#include <fcntl.h>
+#include <locale.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/statvfs.h>
 #include <time.h>
 #include <unistd.h>
 #include <X11/Xlib.h>
@@ -13,20 +18,47 @@
 /* local libraries */
 #include "config.h"
 
+/* 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 *battery();
-char *cpu_temperature();
-char *cpu_usage();
-char *datetime();
-char *ram_usage();
 char *smprintf(char *fmt, ...);
-char *volume();
-char *wifi_signal();
+char *get_battery();
+char *get_cpu_temperature();
+char *get_cpu_usage();
+char *get_datetime();
+char *get_diskusage();
+char *get_ram_usage();
+char *get_volume();
+char *get_wifi_signal();
 
 /* global variables */
 static Display *dpy;
 
+/* check configured paths */
+int
+config_check()
+{
+    struct stat fs;
+
+    /* check all files in the config.h file */
+    CHECK_FILE(batterynowfile, fs);
+    CHECK_FILE(batteryfullfile, fs);
+    CHECK_FILE(tempfile, fs);
+
+    /* check update interval */
+    if (update_interval < 1)
+        return -1;
+
+    /* exit successfully */
+    return 0;
+}
+
 /* set statusbar (WM_NAME) */
 void
 setstatus(char *str)
@@ -35,21 +67,35 @@ setstatus(char *str)
     XSync(dpy, False);
 }
 
+/* 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 *
-battery()
+get_battery()
 {
-    int battery_now, battery_full, battery_perc;
+    int now, full, perc;
     FILE *fp;
 
     /* open battery now file */
     if (!(fp = fopen(batterynowfile, "r"))) {
         fprintf(stderr, "Error opening battery file.");
-        exit(1);
+        return smprintf("n/a");
     }
 
     /* read value */
-    fscanf(fp, "%i", &battery_now);
+    fscanf(fp, "%i", &now);
 
     /* close battery now file */
     fclose(fp);
@@ -57,25 +103,25 @@ battery()
     /* open battery full file */
     if (!(fp = fopen(batteryfullfile, "r"))) {
         fprintf(stderr, "Error opening battery file.");
-        exit(1);
+        return smprintf("n/a");
     }
 
     /* read value */
-    fscanf(fp, "%i", &battery_full);
+    fscanf(fp, "%i", &full);
 
     /* close battery full file */
     fclose(fp);
 
     /* calculate percent */
-    battery_perc = battery_now / (battery_full / 100);
+    perc = now / (full / 100);
 
-    /* return batt_perc as string */
-    return smprintf("%d%%", battery_perc);
+    /* return perc as string */
+    return smprintf("%d%%", perc);
 }
 
 /* cpu temperature */
 char *
-cpu_temperature()
+get_cpu_temperature()
 {
     int temperature;
     FILE *fp;
@@ -83,7 +129,7 @@ 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 */
@@ -98,16 +144,16 @@ cpu_temperature()
 
 /* cpu percentage */
 char *
-cpu_usage()
+get_cpu_usage()
 {
-    int cpu_perc;
+    int 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);
+        return smprintf("n/a");
     }
 
     /* read values */
@@ -122,7 +168,7 @@ cpu_usage()
     /* open stat file */
     if (!(fp = fopen("/proc/stat","r"))) {
         fprintf(stderr, "Error opening stat file.");
-        exit(1);
+        return smprintf("n/a");
     }
 
     /* read values */
@@ -132,92 +178,91 @@ cpu_usage()
     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]));
+    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);
+    /* return perc as string */
+    return smprintf("%d%%", perc);
 }
 
 /* date and time */
 char *
-datetime()
+get_datetime()
 {
     time_t tm;
-    size_t bufsize = 19;
+    size_t bufsize = 64;
     char *buf = malloc(bufsize);
 
     /* get time in format */
     time(&tm);
+    setlocale(LC_TIME, "");
     if(!strftime(buf, bufsize, timeformat, localtime(&tm))) {
+        setlocale(LC_TIME, "C");
         fprintf(stderr, "Strftime failed.\n");
-        exit(1);
+        return smprintf("n/a");
     }
 
+    setlocale(LC_TIME, "C");
     /* return time */
-    return buf;
+    return smprintf("%s", buf);
+}
+
+/* disk usage percentage */
+char *
+get_diskusage()
+{
+    int perc = 0;
+    struct statvfs fs;
+    
+    /* try to open mountpoint */
+    if (statvfs(mountpath, &fs) < 0) {
+        fprintf(stderr, "Could not get filesystem info.\n");
+        return smprintf("n/a");
+    }
+
+    /* calculate percent */
+    perc = 100 * (1.0f - ((float)fs.f_bavail / (float)fs.f_blocks));
+
+    /* return perc */
+    return smprintf("%d%%", perc);
 }
 
 /* ram percentage */
 char *
-ram_usage()
+get_ram_usage()
 {
-    int ram_perc;
-    long total, free, available;
+    int perc;
+    long total, free, buffers, cached;
     FILE *fp;
 
     /* open meminfo file */
     if (!(fp = fopen("/proc/meminfo", "r"))) {
         fprintf(stderr, "Error opening meminfo file.");
-        exit(1);
+        return smprintf("n/a");
     }
 
     /* read the values */
     fscanf(fp, "MemTotal: %ld kB\n", &total);
     fscanf(fp, "MemFree: %ld kB\n", &free);
-    fscanf(fp, "MemAvailable: %ld kB\n", &available);
+    fscanf(fp, "MemAvailable: %ld kB\nBuffers: %ld kB\n", &buffers, &buffers);
+    fscanf(fp, "Cached: %ld kB\n", &cached);
 
     /* close meminfo file */
     fclose(fp);
 
     /* calculate percentage */
-    ram_perc = 100 * (total - available) / total;
-
-    /* return ram_perc as string */
-    return smprintf("%d%%",ram_perc);
-}
-
-/* smprintf function */
-char *
-smprintf(char *fmt, ...)
-{
-    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);
-    }
+    perc = 100 * ((total - free) - (buffers + cached)) / total;
 
-    va_start(fmtargs, fmt);
-    vsnprintf(ret, len, fmt, fmtargs);
-    va_end(fmtargs);
-
-    return ret;
+    /* return perc as string */
+    return smprintf("%d%%", perc);
 }
 
 /* alsa volume percentage */
 char *
-volume()
+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;
@@ -232,12 +277,9 @@ volume()
     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);
+    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)
@@ -254,7 +296,7 @@ volume()
 
 /* wifi percentage */
 char *
-wifi_signal()
+get_wifi_signal()
 {
     int bufsize = 255;
     int strength;
@@ -264,9 +306,11 @@ wifi_signal()
     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);
@@ -274,7 +318,7 @@ wifi_signal()
     /* open wifi file */
     if(!(fp = fopen(path, "r"))) {
         fprintf(stderr, "Error opening wifi operstate file.");
-        exit(1);
+        return smprintf("n/a");
     }
 
     /* read the status */
@@ -285,20 +329,22 @@ wifi_signal()
 
     /* check if interface down */
     if(strcmp(status, "up\n") != 0){
-        return "n/a";
+        return smprintf("n/a");
     }
 
     /* open wifi file */
     if (!(fp = fopen("/proc/net/wireless", "r"))) {
         fprintf(stderr, "Error opening wireless file.");
-        exit(1);
+        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, "wlp3s0:")) != NULL) {
+    if ((datastart = strstr(buf, needle)) != NULL) {
         datastart = strstr(buf, ":");
         sscanf(datastart + 1, " %*d   %d  %*d  %*d        %*d      %*d      %*d      %*d      %*d        %*d", &strength);
     }
@@ -315,6 +361,20 @@ int
 main()
 {
     char status[1024];
+    char *battery = NULL;
+    char *cpu_temperature = NULL;
+    char *cpu_usage = NULL;
+    char *datetime = NULL;
+    char *diskusage = 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))) {
@@ -322,32 +382,34 @@ main()
         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 */	
+    /* 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();
+        /* assign the values */
+        battery = get_battery();
+        cpu_temperature = get_cpu_temperature();
+        cpu_usage = get_cpu_usage();
+        datetime = get_datetime();
+        diskusage = get_diskusage();
+        ram_usage = get_ram_usage();
+        volume = get_volume();
+        wifi_signal = get_wifi_signal();
+
+        /* return the status */
         sprintf(status, FORMATSTRING, ARGUMENTS);
         setstatus(status);
-        free(pWifi_signal);
-        free(pBattery);
-        free(pCpu_usage);
-        free(pCpu_temperature);
-        free(pRam_usage);
-        free(pVolume);
-        free(pDatetime);
+
+        /* free the values */
+        free(battery);
+        free(cpu_temperature);
+        free(cpu_usage);
+        free(datetime);
+        free(diskusage);
+        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 */