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Diffstat (limited to 'tests/dd/skip-seek-past-file.sh')
-rwxr-xr-x | tests/dd/skip-seek-past-file.sh | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/tests/dd/skip-seek-past-file.sh b/tests/dd/skip-seek-past-file.sh new file mode 100755 index 0000000..08bfae5 --- /dev/null +++ b/tests/dd/skip-seek-past-file.sh @@ -0,0 +1,89 @@ +#!/bin/sh +# test diagnostics are printed when seeking too far in seekable files. + +# Copyright (C) 2008-2018 Free Software Foundation, Inc. + +# This program is free software: you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation, either version 3 of the License, or +# (at your option) any later version. + +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. + +# You should have received a copy of the GNU General Public License +# along with this program. If not, see <https://www.gnu.org/licenses/>. + +. "${srcdir=.}/tests/init.sh"; path_prepend_ ./src +print_ver_ dd +require_sparse_support_ # for 'truncate --size=$OFF_T_MAX' +eval $(getlimits) # for OFF_T limits + + +printf "1234" > file || framework_failure_ + +echo "\ +dd: 'standard input': cannot skip to specified offset +0+0 records in +0+0 records out" > skip_err || framework_failure_ + +# skipping beyond number of blocks in file should issue a warning +dd bs=1 skip=5 count=0 status=noxfer < file 2> err || fail=1 +compare skip_err err || fail=1 + +# skipping beyond number of bytes in file should issue a warning +dd bs=3 skip=2 count=0 status=noxfer < file 2> err || fail=1 +compare skip_err err || fail=1 + +# skipping beyond number of blocks in pipe should issue a warning +cat file | dd bs=1 skip=5 count=0 status=noxfer 2> err || fail=1 +compare skip_err err || fail=1 + +# skipping beyond number of bytes in pipe should issue a warning +cat file | dd bs=3 skip=2 count=0 status=noxfer 2> err || fail=1 +compare skip_err err || fail=1 + +# Check seeking beyond file already offset into +# skipping beyond number of blocks in file should issue a warning +(dd bs=1 skip=1 count=0 2>/dev/null && + dd bs=1 skip=4 status=noxfer 2> err) < file || fail=1 +compare skip_err err || fail=1 + +# Check seeking beyond file already offset into +# skipping beyond number of bytes in file should issue a warning +(dd bs=1 skip=1 count=0 2>/dev/null && + dd bs=2 skip=2 status=noxfer 2> err) < file || fail=1 +compare skip_err err || fail=1 + +# seeking beyond end of file is OK +dd bs=1 seek=5 count=0 status=noxfer > file 2> err || fail=1 +echo "0+0 records in +0+0 records out" > err_ok || framework_failure_ +compare err_ok err || fail=1 + +# skipping > OFF_T_MAX should fail immediately +dd bs=1 skip=$OFF_T_OFLOW count=0 status=noxfer < file 2> err && fail=1 +# error message should be "... cannot skip: strerror(EOVERFLOW)" +grep "cannot skip:" err >/dev/null || fail=1 + +# skipping > max file size should fail immediately +if ! truncate --size=$OFF_T_MAX in 2>/dev/null; then + # truncate is to ensure file system doesn't actually support OFF_T_MAX files + dd bs=1 skip=$OFF_T_MAX count=0 status=noxfer < file 2> err \ + && lseek_ok=yes \ + || lseek_ok=no + + if test $lseek_ok = yes; then + # On Solaris 10 at least, lseek(>max file size) succeeds, + # so just check for the skip warning. + compare skip_err err || fail=1 + else + # On Linux kernels at least, lseek(>max file size) fails. + # error message should be "... cannot skip: strerror(EINVAL)" + grep "cannot skip:" err >/dev/null || fail=1 + fi +fi + +Exit $fail |