tests/dd/stats.sh

   1 #!/bin/sh
   2 # Check stats output for SIG{INFO,USR1} and status=progress
   3
   4 # Copyright (C) 2014-2016 Free Software Foundation, Inc.
   5
   6 # This program is free software: you can redistribute it and/or modify
   7 # it under the terms of the GNU General Public License as published by
   8 # the Free Software Foundation, either version 3 of the License, or
   9 # (at your option) any later version.
  10
  11 # This program is distributed in the hope that it will be useful,
  12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 # GNU General Public License for more details.
  15
  16 # You should have received a copy of the GNU General Public License
  17 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18
  19 . "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
  20 print_ver_ dd
  21 require_trap_signame_
  22
  23 kill -l | grep 'INFO' && SIGINFO='INFO' || SIGINFO='USR1'
  24
  25 # This to avoid races in the USR1 case
  26 # as the dd process will terminate by default until
  27 # it has its handler enabled.
  28 trap '' $SIGINFO
  29
  30 mkfifo_or_skip_ fifo
  31
  32 # Terminate any background processes
  33 cleanup_()
  34 {
  35   kill $pid  2>/dev/null
  36   kill $pid2 2>/dev/null
  37   wait
  38 }
  39
  40 for open in '' '1'; do
  41   > err || framework_failure_
  42
  43   # Run dd with the fullblock iflag to avoid short reads
  44   # which can be triggered by reception of signals
  45   dd iflag=fullblock if=/dev/zero of=fifo count=50 bs=5000000 2>err & pid=$!
  46
  47   # Note if we sleep here we give dd a chance to exec and block on open.
  48   # Otherwise we're probably testing SIG_IGN in the forked shell or early dd.
  49   test "$open" && sleep .1
  50
  51   # dd will block on open until fifo is opened for reading.
  52   # Timeout in case dd goes away erroneously which we check for below.
  53   timeout 20 sh -c 'wc -c < fifo > nwritten' & pid2=$!
  54
  55   # Send lots of signals immediately to ensure dd not killed due
  56   # to race setting handler, or blocking on open of fifo.
  57   # Many signals also check that short reads are handled.
  58   until ! kill -s $SIGINFO $pid 2>/dev/null; do
  59     sleep .01
  60   done
  61
  62   wait
  63
  64   # Ensure all data processed and at least last status written
  65   grep '250000000 bytes (250 MB, 238 MiB) copied' err || { cat err; fail=1; }
  66 done
  67
  68 progress_output()
  69 {
  70   { sleep $1; echo 1; } | dd bs=1 status=progress of=/dev/null 2>err
  71   # Progress output should be for "byte copied", while final is "bytes ..."
  72   grep 'byte copied' err
  73 }
  74 retry_delay_ progress_output 1 4 || { cat err; fail=1; }
  75
  76 Exit $fail