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 source tree.
8 */
9 //config:config PIPE_PROGRESS
10 //config: bool "pipe_progress (275 bytes)"
11 //config: default y
12 //config: help
13 //config: Display a dot to indicate pipe activity.
14
15 //applet:IF_PIPE_PROGRESS(APPLET(pipe_progress, BB_DIR_BIN, BB_SUID_DROP))
16
17 //kbuild:lib-$(CONFIG_PIPE_PROGRESS) += pipe_progress.o
18
19 //usage:#define pipe_progress_trivial_usage NOUSAGE_STR
20 //usage:#define pipe_progress_full_usage ""
21
22 #include "libbb.h"
23
24 #define PIPE_PROGRESS_SIZE 4096
25
26 /* Read a block of data from stdin, write it to stdout.
27 * Activity is indicated by a '.' to stderr
28 */
29 int pipe_progress_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
pipe_progress_main(int argc UNUSED_PARAM,char ** argv UNUSED_PARAM)30 int pipe_progress_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
31 {
32 char buf[PIPE_PROGRESS_SIZE];
33 time_t t = time(NULL);
34 int len;
35
36 while ((len = safe_read(STDIN_FILENO, buf, PIPE_PROGRESS_SIZE)) > 0) {
37 time_t new_time = time(NULL);
38 if (new_time != t) {
39 t = new_time;
40 bb_putchar_stderr('.');
41 }
42 full_write(STDOUT_FILENO, buf, len);
43 }
44
45 bb_putchar_stderr('\n');
46
47 return 0;
48 }
49