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/*
Splash daemon
*/
#include <stdlib.h>
#include <stdio.h>
#include <sys/types.h>
#include <unistd.h>
#include <signal.h>
#include <string.h>
char unfilled[64] = " ";
char filled[64] = "=";
char leftborder[64] = "[";
char rightborder[64] = "]";
char animation[64] = "\\|/-";
char message[128] = "SplashD";
int width = 78;
int delay = 50000;
int steps = 10;
char sigusr1 = 0;
char sigusr2 = 0;
char sigterm = 0;
const char options[] = "a:d:f:l:m:r:u:";
void usage(int exitcode) {
fprintf(stderr, "Usage: splashd [-adflru] [OPTION] STEPS\n");
exit(exitcode);
}
int parse_args(int argc, char *argv[]) {
int c;
while ((c = getopt(argc, argv, options)) > 0) {
switch(c) {
case 'a': {
strncpy(animation, optarg, sizeof(animation));
break;
}
case 'd': {
delay = atoi(optarg);
break;
}
case 'f': {
strncpy(filled, optarg, sizeof(filled));
break;
}
case 'l': {
strncpy(leftborder, optarg, sizeof(leftborder));
break;
}
case 'm': {
strncpy(message, optarg, sizeof(message));
break;
}
case 'r': {
strncpy(rightborder, optarg, sizeof(rightborder));
break;
}
case 'u': {
strncpy(unfilled, optarg, sizeof(unfilled));
break;
}
case '?':
default: {
usage(1);
break;
}
}
}
if (optind != argc-1) usage(1);
return atoi(argv[optind]);
}
void clear_screen(void) {
int i;
for (i=0; i<50; i++) {
printf("\f");
}
printf("\n");
}
void center(char *s) {
int i;
printf("\n");
for (i=0; i < (80-strlen(s)) /2; i++) putchar(' ');
printf("%s", s);
}
void draw_bar(int steps, char *msg) {
int i=0;
char bar[256];
char *p = bar;
int size=sizeof(bar);
if (steps >= 78) steps=78;
for (i=0; i < 20; i++) printf("\n");
p += snprintf(p, (size =- strlen(leftborder)), "%s", leftborder);
for (i=0; i < steps; i++) {
p += snprintf(p, (size =-strlen(unfilled)), "%s", unfilled);
}
p += snprintf(p, (size =- strlen(rightborder)), "%s", rightborder);
center(msg);
printf("\n");
center(bar);
for (i=0; i<steps+1; i++) putchar('\b');
fflush(stdout);
}
void sig_handler(int signo) {
signal(signo, sig_handler);
switch(signo) {
case SIGUSR1: {
sigusr1 = 1;
break;
}
case SIGUSR2: {
sigusr2 = 1;
break;
}
case SIGTERM: {
sigterm = 1;
break;
}
default:
exit(0);
}
}
void fill_barstr(char *buf, size_t totsize,
int current, int steps, char curs) {
int i = 0;
int lbsize = strlen(leftborder);
int rbsize = strlen(rightborder);
int barsize = totsize - lbsize - rbsize;
int fillcount = current * barsize / steps;
int fillsize = strlen(filled) * fillcount;
char *bar = buf + lbsize;
if (totsize < lbsize + rbsize + 1) return;
strncpy(buf, leftborder, totsize);
memset(bar, unfilled[0], barsize);
memset(bar, filled[0], fillcount);
strncpy(bar + barsize, rightborder, totsize - rbsize);
if ( current < steps) bar[fillcount] = curs;
}
void run_animation(int steps) {
int current = 0;
int i=0;
char buf[256];
while (current < steps && sigterm == 0) {
fill_barstr(buf, width, current, steps, animation[i]);
i = (i + 1) % strlen(animation);
printf("\r%s", buf);
usleep(delay);
if (sigusr1) {
sigusr1 = 0;
current++;
}
fflush(stdout);
}
fill_barstr(buf, width, steps, steps, animation[i]);
printf("\r%s", buf);
fflush(stdout);
}
int main(int argc, char *argv[]) {
int steps;
steps = parse_args(argc, argv);
/* clear screen */
// clear_screen();
/* fork */
if (fork()) {
exit(0);
}
/* attatch to signal handler */
signal(SIGUSR1, sig_handler);
signal(SIGTERM, sig_handler);
run_animation(steps);
printf("\n\n");
return 0;
}
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