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pipe_progress.c 852 B

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  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. #include "libbb.h"
  10. #define PIPE_PROGRESS_SIZE 4096
  11. /* Read a block of data from stdin, write it to stdout.
  12. * Activity is indicated by a '.' to stderr
  13. */
  14. int pipe_progress_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
  15. int pipe_progress_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
  16. {
  17. char buf[PIPE_PROGRESS_SIZE];
  18. time_t t = time(NULL);
  19. int len;
  20. while ((len = safe_read(STDIN_FILENO, buf, PIPE_PROGRESS_SIZE)) > 0) {
  21. time_t new_time = time(NULL);
  22. if (new_time != t) {
  23. t = new_time;
  24. bb_putchar_stderr('.');
  25. }
  26. full_write(STDOUT_FILENO, buf, len);
  27. }
  28. bb_putchar_stderr('\n');
  29. return 0;
  30. }