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	dwmstatus.c - dwmstatus - A simple dwm status application in C.
	git clone git://git.suckless.org/dwmstatus
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	dwmstatus.c (4380B)
	---
	1 /*
	2 * Copy me if you can.
	3 * by 20h
	4 */
	5
	6 #define _BSD_SOURCE
	7 #include <unistd.h>
	8 #include <stdio.h>
	9 #include <stdlib.h>
	10 #include <stdarg.h>
	11 #include <string.h>
	12 #include <strings.h>
	13 #include <sys/time.h>
	14 #include <time.h>
	15 #include <sys/types.h>
	16 #include <sys/wait.h>
	17
	18 #include <X11/Xlib.h>
	19
	20 char *tzargentina = "America/Buenos_Aires";
	21 char *tzutc = "UTC";
	22 char *tzberlin = "Europe/Berlin";
	23
	24 static Display *dpy;
	25
	26 char *
	27 smprintf(char *fmt, ...)
	28 {
	29 va_list fmtargs;
	30 char *ret;
	31 int len;
	32
	33 va_start(fmtargs, fmt);
	34 len = vsnprintf(NULL, 0, fmt, fmtargs);
	35 va_end(fmtargs);
	36
	37 ret = malloc(++len);
	38 if (ret == NULL) {
	39 perror("malloc");
	40 exit(1);
	41 }
	42
	43 va_start(fmtargs, fmt);
	44 vsnprintf(ret, len, fmt, fmtargs);
	45 va_end(fmtargs);
	46
	47 return ret;
	48 }
	49
	50 void
	51 settz(char *tzname)
	52 {
	53 setenv("TZ", tzname, 1);
	54 }
	55
	56 char *
	57 mktimes(char fmt, char tzname)
	58 {
	59 char buf[129];
	60 time_t tim;
	61 struct tm *timtm;
	62
	63 settz(tzname);
	64 tim = time(NULL);
	65 timtm = localtime(&tim);
	66 if (timtm == NULL)
	67 return smprintf("");
	68
	69 if (!strftime(buf, sizeof(buf)-1, fmt, timtm)) {
	70 fprintf(stderr, "strftime == 0\n");
	71 return smprintf("");
	72 }
	73
	74 return smprintf("%s", buf);
	75 }
	76
	77 void
	78 setstatus(char *str)
	79 {
	80 XStoreName(dpy, DefaultRootWindow(dpy), str);
	81 XSync(dpy, False);
	82 }
	83
	84 char *
	85 loadavg(void)
	86 {
	87 double avgs[3];
	88
	89 if (getloadavg(avgs, 3) < 0)
	90 return smprintf("");
	91
	92 return smprintf("%.2f %.2f %.2f", avgs[0], avgs[1], avgs[2]);
	93 }
	94
	95 char *
	96 readfile(char base, char file)
	97 {
	98 char *path, line[513];
	99 FILE *fd;
	100
	101 memset(line, 0, sizeof(line));
	102
	103 path = smprintf("%s/%s", base, file);
	104 fd = fopen(path, "r");
	105 free(path);
	106 if (fd == NULL)
	107 return NULL;
	108
	109 if (fgets(line, sizeof(line)-1, fd) == NULL) {
	110 fclose(fd);
	111 return NULL;
	112 }
	113 fclose(fd);
	114
	115 return smprintf("%s", line);
	116 }
	117
	118 char *
	119 getbattery(char *base)
	120 {
	121 char *co, status;
	122 int descap, remcap;
	123
	124 descap = -1;
	125 remcap = -1;
	126
	127 co = readfile(base, "present");
	128 if (co == NULL)
	129 return smprintf("");
	130 if (co[0] != '1') {
	131 free(co);
	132 return smprintf("not present");
	133 }
	134 free(co);
	135
	136 co = readfile(base, "charge_full_design");
	137 if (co == NULL) {
	138 co = readfile(base, "energy_full_design");
	139 if (co == NULL)
	140 return smprintf("");
	141 }
	142 sscanf(co, "%d", &descap);
	143 free(co);
	144
	145 co = readfile(base, "charge_now");
	146 if (co == NULL) {
	147 co = readfile(base, "energy_now");
	148 if (co == NULL)
	149 return smprintf("");
	150 }
	151 sscanf(co, "%d", &remcap);
	152 free(co);
	153
	154 co = readfile(base, "status");
	155 if (!strncmp(co, "Discharging", 11)) {
	156 status = '-';
	157 } else if(!strncmp(co, "Charging", 8)) {
	158 status = '+';
	159 } else {
	160 status = '?';
	161 }
	162
	163 if (remcap < 0 \|\| descap < 0)
	164 return smprintf("invalid");
	165
	166 return smprintf("%.0f%%%c", ((float)remcap / (float)descap) * 10…
	167 }
	168
	169 char *
	170 gettemperature(char base, char sensor)
	171 {
	172 char *co;
	173
	174 co = readfile(base, sensor);
	175 if (co == NULL)
	176 return smprintf("");
	177 return smprintf("%02.0f°C", atof(co) / 1000);
	178 }
	179
	180 char *
	181 execscript(char *cmd)
	182 {
	183 FILE *fp;
	184 char retval[1025], *rv;
	185
	186 memset(retval, 0, sizeof(retval));
	187
	188 fp = popen(cmd, "r");
	189 if (fp == NULL)
	190 return smprintf("");
	191
	192 rv = fgets(retval, sizeof(retval), fp);
	193 pclose(fp);
	194 if (rv == NULL)
	195 return smprintf("");
	196 retval[strlen(retval)-1] = '\0';
	197
	198 return smprintf("%s", retval);
	199 }
	200
	201 int
	202 main(void)
	203 {
	204 char *status;
	205 char *avgs;
	206 char *bat;
	207 char *tmar;
	208 char *tmutc;
	209 char *tmbln;
	210 char *t0;
	211 char *t1;
	212 char *kbmap;
	213 char *surfs;
	214 char *memes;
	215
	216 if (!(dpy = XOpenDisplay(NULL))) {
	217 fprintf(stderr, "dwmstatus: cannot open display.\n");
	218 return 1;
	219 }
	220
	221 for (;;sleep(30)) {
	222 avgs = loadavg();
	223 bat = getbattery("/sys/class/power_supply/BAT0");
	224 tmar = mktimes("%H:%M", tzargentina);
	225 tmutc = mktimes("%H:%M", tzutc);
	226 tmbln = mktimes("KW %W %a %d %b %H:%M %Z %Y", tzberlin);
	227 kbmap = execscript("setxkbmap -query \| grep layout \| cut…
	228 surfs = execscript("surf-status");
	229 memes = execscript("meme-status");
	230 t0 = gettemperature("/sys/devices/virtual/thermal/therma…
	231 t1 = gettemperature("/sys/devices/virtual/thermal/therma…
	232
	233 status = smprintf("S:%s M:%s K:%s T:%s\|%s L:%s B:%s A:%s…
	234 surfs, memes, kbmap, t0, t1, avgs, bat, …
	235 tmbln);
	236 setstatus(status);
	237
	238 free(surfs);
	239 free(memes);
	240 free(kbmap);
	241 free(t0);
	242 free(t1);
	243 free(avgs);
	244 free(bat);
	245 free(tmar);
	246 free(tmutc);
	247 free(tmbln);
	248 free(status);
	249 }
	250
	251 XCloseDisplay(dpy);
	252
	253 return 0;
	254 }
	255