tests/tail-2/start-middle

   1 #!/bin/sh
   2 # Verify that tail works even when it's reading from a file
   3 # that is not at its beginning.  Based on a report from John Roll.
   4
   5 # Copyright (C) 2001, 2002, 2004, 2006 Free Software Foundation, Inc.
   6
   7 # This program is free software; you can redistribute it and/or modify
   8 # it under the terms of the GNU General Public License as published by
   9 # the Free Software Foundation; either version 2 of the License, or
  10 # (at your option) any later version.
  11
  12 # This program is distributed in the hope that it will be useful,
  13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 # GNU General Public License for more details.
  16
  17 # You should have received a copy of the GNU General Public License
  18 # along with this program; if not, write to the Free Software
  19 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  20 # 02110-1301, USA.
  21
  22 if test "$VERBOSE" = yes; then
  23   set -x
  24   tail --version
  25 fi
  26
  27 pwd=`pwd`
  28 tmp=tail-mid.$$
  29 trap 'status=$?; cd "$pwd" && rm -rf $tmp && exit $status' 0
  30 trap '(exit $?); exit' 1 2 13 15
  31
  32 framework_failure=0
  33 mkdir $tmp || framework_failure=1
  34 cd $tmp || framework_failure=1
  35
  36 (echo 1; echo 2) > k || framework_failure=1
  37
  38 if test $framework_failure = 1; then
  39   echo "$0: failure in testing framework" 1>&2
  40   (exit 1); exit 1
  41 fi
  42
  43 fail=0
  44
  45 sh -c 'read x; tail' < k > out || fail=1
  46 cat <<EOF > exp
  47 2
  48 EOF
  49
  50 cmp out exp || fail=1
  51 test $fail = 1 && diff out exp 2> /dev/null
  52
  53 (exit $fail); exit $fail