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	uptime.c (2446B)
	---
	1 #define _BSD_SOURCE
	2 #define _GNU_SOURCE
	3 #include <unistd.h>
	4 #include <stdio.h>
	5 #include <stdlib.h>
	6 #include <stdarg.h>
	7 #include <string.h>
	8 #include <strings.h>
	9 #include <sys/time.h>
	10 #include <sys/sysinfo.h>
	11 #include <time.h>
	12 #include <sys/types.h>
	13 #include <dirent.h>
	14 #include <sys/statvfs.h>
	15
	16
	17 #include <X11/Xlib.h>
	18
	19 char *tzparis = "Europe/Paris";
	20
	21 static Display *dpy;
	22
	23 char *
	24 smprintf(char *fmt, ...)
	25 {
	26 va_list fmtargs;
	27 char *buf = NULL;
	28
	29 va_start(fmtargs, fmt);
	30 if (vasprintf(&buf, fmt, fmtargs) == -1){
	31 fprintf(stderr, "malloc vasprintf\n");
	32 exit(1);
	33 }
	34 va_end(fmtargs);
	35
	36 return buf;
	37 }
	38
	39 void
	40 settz(char *tzname)
	41 {
	42 setenv("TZ", tzname, 1);
	43 }
	44
	45 char *
	46 mktimes(char fmt, char tzname)
	47 {
	48 char buf[129];
	49 time_t tim;
	50 struct tm *timtm;
	51
	52 memset(buf, 0, sizeof(buf));
	53 settz(tzname);
	54 tim = time(NULL);
	55 timtm = localtime(&tim);
	56 if (timtm == NULL) {
	57 perror("localtime");
	58 exit(1);
	59 }
	60
	61 if (!strftime(buf, sizeof(buf)-1, fmt, timtm)) {
	62 fprintf(stderr, "strftime == 0\n");
	63 exit(1);
	64 }
	65
	66 return smprintf(buf);
	67 }
	68
	69 void
	70 setstatus(char *str)
	71 {
	72 XStoreName(dpy, DefaultRootWindow(dpy), str);
	73 XSync(dpy, False);
	74 }
	75
	76 char *
	77 loadavg(void)
	78 {
	79 double avgs[3];
	80
	81 if (getloadavg(avgs, 3) < 0) {
	82 perror("getloadavg");
	83 exit(1);
	84 }
	85
	86 return smprintf("%.2f %.2f %.2f", avgs[0], avgs[1], avgs[2]);
	87 }
	88
	89
	90 char *
	91 up() {
	92 struct sysinfo info;
	93 int h,m = 0;
	94 sysinfo(&info);
	95 h = info.uptime/3600;
	96 m = (info.uptime - h*3600 )/60;
	97 return smprintf("%dh%dm",h,m);
	98 }
	99
	100
	101 int runevery(time_t *ltime, int sec){
	102 /* return 1 if sec elapsed since last run
	103 * else return 0
	104 */
	105 time_t now = time(NULL);
	106
	107 if ( difftime(now, *ltime ) >= sec)
	108 {
	109 *ltime = now;
	110 return(1);
	111 }
	112 else
	113 return(0);
	114 }
	115
	116 int
	117 main(void)
	118 {
	119 char *status = NULL;
	120 char *tmprs = NULL;
	121 char *avgs = NULL;
	122 time_t count60 = 0;
	123 char *uptm = NULL;
	124
	125 if (!(dpy = XOpenDisplay(NULL))) {
	126 fprintf(stderr, "dwmstatus: cannot open display.\n");
	127 return 1;
	128 }
	129
	130 for (;;sleep(1)) {
	131 /* checks every minutes */
	132 if ( runevery(&count60, 60) )
	133 {
	134 free(tmprs);
	135 free(uptm);
	136 tmprs = mktimes("%d/%m/%y %H:%M", tzparis);
	137 uptm = up();
	138 }
	139 /* checks every second */
	140 avgs = loadavg();
	141
	142 status = smprintf("%s \| Up:%s \| %s",
	143 avgs, uptm, tmprs);
	144 setstatus(status);
	145 free(avgs);
	146 free(status);
	147 }
	148
	149 XCloseDisplay(dpy);
	150
	151 return 0;
	152 }
	153