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	barM.c (3133B)
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	1 /*
	2 * Copyright (C) 2014,2015 levi0x0 with enhancements by ProgrammerNerd
	3 *
	4 * barM (bar_monitor or BarMonitor) is free software; you can redistribu…
	5 * modify it under the terms of the GNU General Public License
	6 * as published by the Free Software Foundation; either version 2
	7 * of the License, or (at your option) any later version.
	8 *
	9 * This is a new version of bar monitor, even less lines of code more e…
	10 *
	11 * Read main() to configure your new status Bar.
	12 *
	13 * compile: gcc -o barM barM.c -O2 -s -lX11
	14 *
	15 * mv barM /usr/local/bin/
	16 */
	17
	18 #include <stdio.h>
	19 #include <stdlib.h>
	20 #include <time.h>
	21 #include <string.h>
	22 #include <stdarg.h>
	23 #include <X11/Xlib.h>
	24 #include <sys/utsname.h>
	25 #include <sys/sysinfo.h>
	26
	27 /*
	28 * Put this in your .xinitrc file:
	29 *
	30 * barM&
	31 *
	32 */
	33
	34 #define VERSION "0.12"
	35 #define TIME_FORMAT "%H:%M) (%d-%m-%Y"
	36 #define MAXSTR 1024
	37
	38 static const char * date(void);
	39 static const char * getuname(void);
	40 static const char * ram(void);
	41 static void XSetRoot(const char *name);
	42 /Append here your functions./
	43 static const char(const functab[])(void)={
	44 ram,date
	45 };
	46
	47 int main(void){
	48 char status[MAXSTR];
	49 /* It is foolish to repeatedly update uname. */
	50 int ret;
	51 {struct utsname u;
	52 if(uname(&u)){
	53 perror("uname failed");
	54 return 1;
	55 }
	56 ret=snprintf(status,sizeof(status),"(%s %s %s) ",u.sysname,u.nod…
	57 char*off=status+ret;
	58 if(off>=(status+MAXSTR)){
	59 XSetRoot(status);
	60 return 1;/This should not happen/
	61 }
	62 for(;;){
	63 int left=sizeof(status)-ret,i;
	64 char*sta=off;
	65 for(i = 0; i<sizeof(functab)/sizeof(functab[0]); ++i ) {
	66 int ret=snprintf(sta,left,"(%s) ",functab[i]());
	67 sta+=ret;
	68 left-=ret;
	69 if(sta>=(status+MAXSTR))/*When snprintf has to r…
	70 break;
	71 }
	72 XSetRoot(status);
	73 sleep(1);
	74 }
	75 return 0;
	76 }
	77
	78 /* Returns the date*/
	79 static const char * date(void){
	80 static char date[MAXSTR];
	81 time_t now = time(0);
	82
	83 strftime(date, MAXSTR, TIME_FORMAT, localtime(&now));
	84 return date;
	85 }
	86 /* Returns a string that contains the amount of free and available ram i…
	87 static const char * ram(void){
	88 static char ram[MAXSTR];
	89 struct sysinfo s;
	90 sysinfo(&s);
	91 snprintf(ram,sizeof(ram),"%.1fM,%.1fM",((double)(s.totalram-s.fr…
	92 return ram;
	93 }
	94
	95 static void XSetRoot(const char *name){
	96 Display *display;
	97
	98 if (( display = XOpenDisplay(0x0)) == NULL ) {
	99 fprintf(stderr, "[barM] cannot open display!\n");
	100 exit(1);
	101 }
	102
	103 XStoreName(display, DefaultRootWindow(display), name);
	104 XSync(display, 0);
	105
	106 XCloseDisplay(display);
	107 }
	108