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+--- Thread: [C] Little Timer (/thread-520.html)
[C] Little Timer - RichardGv - 08-30-2010
(This program was posted on another forum, that should not be revealed here, too.)
This is a little timer program I wrote, a clone of sleep (in GNU coreutils) but it displays more information. It uses the same argument format as sleep. It's not really a script (but a program), but there's no more suitable places to post it.
It's untested under any environment other than my Gentoo. It uses a nonstandard sleep() function that may or may not exist in your C library. (It exists in glibc.) And a C99-compliant compiler is required.
For any results that it creates, I'm not liable. (For example, if you overcook your dinner because the timing does not work, you won't get a free lunch from me. )
Code:
// timer.c -- sleep clone with more information displayed
// Richard Grenville
// August 30th, 2010
// License: GPLv3 (or a newer version)
// Tested with gcc 4.4.4 under Gentoo amd64
// vim: ts=4
#include <stdio.h>
#include <stdlib.h>
#include <limits.h>
const char *MSG[] = {
[0] = "Usage: timer <waiting time (s/m/h/d) ...>\n"
};
inline void prttime(const long time, const long totaltime) {
printf("%2ld:%2ld:%2ld (%4.1f%%) left.\n", time / 3600, time % 3600 / 60
, time % 60, (double) time / totaltime * 100);
}
long argproc(const char *str);
int main(int argc, char *argv[]) {
long time, totaltime = 0;
long i;
char **argptr, **argend;
if(1 == argc) {
fputs(MSG[0], stderr);
return -1;
}
for(argptr = argv + 1, argend = argv + argc
; argptr < argend; argptr++) {
if((i = argproc(*argptr)) < 0) {
if(-1 == i)
fputs(MSG[0], stderr);
return i;
}
totaltime += i;
}
time = totaltime;
while(time-- > 0) {
// printf("Time: %ld\n", time);
if(sleep(1))
return 1;
prttime(time, totaltime);
}
return 0;
}
long argproc(const char *str) {
char *endptr, **pendptr = &endptr;
double convval;
convval = strtod(str, pendptr);
if('\0' == *endptr) {
if(convval > LONG_MAX)
return -2;
return (long) convval;
}
if('\0' != *(endptr + 1))
return -1;
switch(*endptr) {
case 's': break;
case 'm': convval *= 60;
break;
case 'h': convval *= 3600;
break;
case 'd': convval *= 3600 * 24;
break;
}
if(convval > LONG_MAX)
return -2;
return (long) convval;
}For the detailed argument format, do $ sleep --help.