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	tstopwatch.c - stopwatch - simple timer for console or x root window
	git clone git://src.adamsgaard.dk/stopwatch
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	tstopwatch.c (1724B)
	---
	1 #include <stdio.h>
	2 #include <stdlib.h>
	3 #include <limits.h>
	4 #include <unistd.h>
	5 #include <time.h>
	6 #include <string.h>
	7 #include <err.h>
	8 #include <X11/Xlib.h>
	9
	10 #include "timeutil.h"
	11
	12 char *argv0;
	13
	14 void
	15 usage()
	16 {
	17 errx(1, "usage: %s [-p prefix] [-P postfix] [-i interval] [-x]",…
	18 }
	19
	20 void
	21 print_loop(unsigned int interval, char prefix, char postfix)
	22 {
	23 char buf[LINE_MAX];
	24 time_t t_start = time(NULL);
	25
	26 while (1) {
	27 format_time(buf, sizeof(buf), time(NULL) - t_start, pref…
	28 printf("\r%s", buf);
	29 fflush(stdout);
	30 sleep(interval);
	31 }
	32 }
	33
	34 void
	35 xroot_loop(unsigned int interval, char prefix, char postfix)
	36 {
	37 Display *dpy;
	38 char buf[LINE_MAX];
	39 time_t t_start = time(NULL);
	40
	41 dpy = XOpenDisplay(NULL);
	42 if (dpy == NULL)
	43 errx(1, "cannot open display");
	44 while (1) {
	45 format_time(buf, sizeof(buf), time(NULL) - t_start, pref…
	46 XStoreName(dpy, DefaultRootWindow(dpy), buf);
	47 XSync(dpy, False);
	48 sleep(interval);
	49 }
	50 }
	51
	52 int
	53 main(int argc, char *argv[])
	54 {
	55 int ch, xflag = 0;
	56 unsigned int interval = 1;
	57 char prefix[LINE_MAX] = "", postfix[LINE_MAX] = "";
	58 const char *errstr;
	59
	60 argv0 = *argv;
	61
	62 while ((ch = getopt(argc, argv, "p:P:i:x")) != -1) {
	63 switch (ch) {
	64 case 'p':
	65 strlcpy(prefix, optarg, sizeof(prefix));
	66 break;
	67 case 'P':
	68 strlcpy(postfix, optarg, sizeof(postfix));
	69 break;
	70 case 'i':
	71 interval = strtonum(optarg, 1, UINT_MAX, &errstr…
	72 if (errstr != NULL)
	73 errx(1, "interval is %s: %s", errstr, op…
	74 break;
	75 case 'x':
	76 xflag = 1;
	77 break;
	78 default:
	79 usage();
	80 }
	81 }
	82 argc -= optind;
	83 argv += optind;
	84 if (argc > 0)
	85 usage();
	86
	87 if (xflag)
	88 xroot_loop(interval, prefix, postfix);
	89 else
	90 print_loop(interval, prefix, postfix);
	91
	92 return 0;
	93 }