Linux debugging

Check our new training course

Linux debugging, tracing, profiling & perf. analysis

Check our new training course
with Creative Commons CC-BY-SA
lecture and lab materials

Bootlin logo

Elixir Cross Referencer

/* vi: set sw=4 ts=4: */
 * Monitor a pipe with a simple progress display.
 * Copyright (C) 2003 by Rob Landley <>, Joey Hess
 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
#include "libbb.h"


/* Read a block of data from stdin, write it to stdout.
 * Activity is indicated by a '.' to stderr
int pipe_progress_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int pipe_progress_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
	time_t t = time(NULL);
	int len;

	while ((len = safe_read(STDIN_FILENO, buf, PIPE_PROGRESS_SIZE)) > 0) {
		time_t new_time = time(NULL);
		if (new_time != t) {
			t = new_time;
		full_write(STDOUT_FILENO, buf, len);


	return 0;