1/* vi: set sw=4 ts=4: */
2/*
3 * Monitor a pipe with a simple progress display.
4 *
5 * Copyright (C) 2003 by Rob Landley <rob@landley.net>, Joey Hess
6 *
7 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
8 */
9#include "libbb.h"
10
11#define PIPE_PROGRESS_SIZE 4096
12
13/* Read a block of data from stdin, write it to stdout.
14 * Activity is indicated by a '.' to stderr
15 */
16int pipe_progress_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
17int pipe_progress_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
18{
19	char buf[PIPE_PROGRESS_SIZE];
20	time_t t = time(NULL);
21	int len;
22
23	while ((len = safe_read(STDIN_FILENO, buf, PIPE_PROGRESS_SIZE)) > 0) {
24		time_t new_time = time(NULL);
25		if (new_time != t) {
26			t = new_time;
27			bb_putchar_stderr('.');
28		}
29		full_write(STDOUT_FILENO, buf, len);
30	}
31
32	bb_putchar_stderr('\n');
33
34	return 0;
35}
36