| # test diagnostics are printed when seeking too far in seekable files. | |
| # Copyright (C) 2008-2025 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' | |
| getlimits_ # for OFF_T limits | |
| export LC_ALL=C | |
| 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=$OFF_T_OFLOW count=0 status=noxfer < file 2> err && fail=1 | |
| # error message should be "... invalid number: strerror(EOVERFLOW)" | |
| grep "invalid number:" err >/dev/null || fail=1 | |
| dd bs=1 skip=${OFF_T_OFLOW}x$OFF_T_OFLOW count=0 status=noxfer < file 2> err && | |
| fail=1 | |
| grep "invalid number:" err >/dev/null || fail=1 | |
| # skipping > max file size should fail immediately | |
| if ! truncate --size=$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=none < 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 that there are no diagnostics. | |
| compare /dev/null 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 | |