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# test diagnostics are printed when seeking too far in seekable files.
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# Copyright (C) 2008-2012 Free Software Foundation, Inc.
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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. "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
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require_sparse_support_ # for 'truncate --size=$OFF_T_MAX'
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eval $(getlimits) # for OFF_T limits
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printf "1234" > file || framework_failure_
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dd: 'standard input': cannot skip to specified offset
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0+0 records out" > skip_err || framework_failure_
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# skipping beyond number of blocks in file should issue a warning
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dd bs=1 skip=5 count=0 status=noxfer < file 2> err || fail=1
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compare skip_err err || fail=1
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# skipping beyond number of bytes in file should issue a warning
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dd bs=3 skip=2 count=0 status=noxfer < file 2> err || fail=1
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compare skip_err err || fail=1
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# skipping beyond number of blocks in pipe should issue a warning
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cat file | dd bs=1 skip=5 count=0 status=noxfer 2> err || fail=1
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compare skip_err err || fail=1
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# skipping beyond number of bytes in pipe should issue a warning
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cat file | dd bs=3 skip=2 count=0 status=noxfer 2> err || fail=1
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compare skip_err err || fail=1
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# Check seeking beyond file already offset into
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# skipping beyond number of blocks in file should issue a warning
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(dd bs=1 skip=1 count=0 2>/dev/null &&
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dd bs=1 skip=4 status=noxfer 2> err) < file || fail=1
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compare skip_err err || fail=1
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# Check seeking beyond file already offset into
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# skipping beyond number of bytes in file should issue a warning
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(dd bs=1 skip=1 count=0 2>/dev/null &&
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dd bs=2 skip=2 status=noxfer 2> err) < file || fail=1
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compare skip_err err || fail=1
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# seeking beyond end of file is OK
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dd bs=1 seek=5 count=0 status=noxfer > file 2> err || fail=1
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0+0 records out" > err_ok || framework_failure_
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compare err_ok err || fail=1
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# skipping > OFF_T_MAX should fail immediately
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dd bs=1 skip=$OFF_T_OFLOW count=0 status=noxfer < file 2> err && fail=1
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# error message should be "... cannot skip: strerror(EOVERFLOW)"
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grep "cannot skip:" err >/dev/null || fail=1
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# skipping > max file size should fail immediately
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if ! truncate --size=$OFF_T_MAX in 2>/dev/null; then
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# truncate is to ensure file system doesn't actually support OFF_T_MAX files
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dd bs=1 skip=$OFF_T_MAX count=0 status=noxfer < file 2> err \
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if test $lseek_ok = yes; then
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# On Solaris 10 at least, lseek(>max file size) succeeds,
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# so just check for the skip warning.
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compare skip_err err || fail=1
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# On Linux kernels at least, lseek(>max file size) fails.
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# error message should be "... cannot skip: strerror(EINVAL)"
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grep "cannot skip:" err >/dev/null || fail=1
added
removed
tests/dd/skip-seek-past-file.sh
