tests/dd/bytes.sh

   1 #!/bin/sh
   2
   3 # Copyright (C) 2012-2013 Free Software Foundation, Inc.
   4
   5 # This program is free software: you can redistribute it and/or modify
   6 # it under the terms of the GNU General Public License as published by
   7 # the Free Software Foundation, either version 3 of the License, or
   8 # (at your option) any later version.
   9
  10 # This program is distributed in the hope that it will be useful,
  11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 # GNU General Public License for more details.
  14
  15 # You should have received a copy of the GNU General Public License
  16 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17
  18 . "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
  19 print_ver_ dd
  20
  21 # count_bytes
  22 echo 0123456789abcdefghijklm > in || framework_failure_
  23 dd count=14 conv=swab iflag=count_bytes < in > out 2> /dev/null || fail=1
  24 case $(cat out) in
  25  1032547698badc) ;;
  26  *) fail=1 ;;
  27 esac
  28
  29 # skip_bytes
  30 echo 0123456789abcdefghijklm > in || framework_failure_
  31 dd skip=10 iflag=skip_bytes < in > out 2> /dev/null || fail=1
  32 case $(cat out) in
  33  abcdefghijklm) ;;
  34  *) fail=1 ;;
  35 esac
  36
  37 # skip records and bytes from pipe
  38 echo 0123456789abcdefghijklm |
  39  dd skip=10 bs=2 iflag=skip_bytes > out 2> /dev/null || fail=1
  40 case $(cat out) in
  41  abcdefghijklm) ;;
  42  *) fail=1 ;;
  43 esac
  44
  45 # seek bytes
  46 echo abcdefghijklm |
  47  dd bs=5 seek=8 oflag=seek_bytes > out 2> /dev/null || fail=1
  48 printf '\0\0\0\0\0\0\0\0abcdefghijklm\n' > expected
  49 compare expected out || fail=1
  50
  51 # Just truncation, no I/O
  52 dd bs=5 seek=8 oflag=seek_bytes of=out2 count=0 2> /dev/null || fail=1
  53 truncate -s8 expected2
  54 compare expected2 out2 || fail=1
  55
  56 Exit $fail