~vcs-imports/busybox/trunk

/* vi: set sw=4 ts=4: */

/*

 * Monitor a pipe with a simple progress display.

 *

 * Copyright (C) 2003 by Rob Landley <rob@landley.net>, Joey Hess

 *

 * Licensed under GPLv2 or later, see file LICENSE in this source tree.

 */

//config:config PIPE_PROGRESS

//config:	bool "pipe_progress (275 bytes)"

//config:	default y

//config:	help

//config:	Display a dot to indicate pipe activity.

//applet:IF_PIPE_PROGRESS(APPLET(pipe_progress, BB_DIR_BIN, BB_SUID_DROP))

//kbuild:lib-$(CONFIG_PIPE_PROGRESS) += pipe_progress.o

//usage:#define pipe_progress_trivial_usage NOUSAGE_STR

//usage:#define pipe_progress_full_usage ""

#include "libbb.h"

#define PIPE_PROGRESS_SIZE 4096

/* 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)

{

	char buf[PIPE_PROGRESS_SIZE];

	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;

			bb_putchar_stderr('.');

		}

		full_write(STDOUT_FILENO, buf, len);

	}

	bb_putchar_stderr('\n');

	return 0;

}