release/src/router/busybox/debianutils/pipe_progress.c

   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
  10 #include "libbb.h"
  11
  12 #define PIPE_PROGRESS_SIZE 4096
  13
  14 /* Read a block of data from stdin, write it to stdout.
  15  * Activity is indicated by a '.' to stderr
  16  */
  17 int pipe_progress_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
  18 int pipe_progress_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
  19 {
  20         RESERVE_CONFIG_BUFFER(buf, PIPE_PROGRESS_SIZE);
  21         time_t t = time(NULL);
  22         size_t len;
  23
  24         while ((len = fread(buf, 1, PIPE_PROGRESS_SIZE, stdin)) > 0) {
  25                 time_t new_time = time(NULL);
  26                 if (new_time != t) {
  27                         t = new_time;
  28                         fputc('.', stderr);
  29                 }
  30                 fwrite(buf, len, 1, stdout);
  31         }
  32
  33         fputc('\n', stderr);
  34
  35         if (ENABLE_FEATURE_CLEAN_UP)
  36                 RELEASE_CONFIG_BUFFER(buf);
  37
  38         return 0;
  39 }