| # Ensure dd recognizes failure to write to stderr. | |
| # Copyright (C) 2009-2025 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/>. | |
| . "${srcdir=.}/tests/init.sh"; path_prepend_ ./src | |
| print_ver_ dd | |
| p=$abs_top_builddir | |
| # Ensure this exits successfully, even though stderr is closed, | |
| # because it generates no stderr output. | |
| dd --help >/dev/null 2>&- || fail=1 | |
| # If 2>&- works, ensure this fails, because stderr is closed and it | |
| # *does* generate output. 2>&- apparently does not work in HP-UX 11.23. | |
| # This test is ineffective unless /dev/stderr also works. | |
| # This exposes a failure present in 6.11 through 7.5. | |
| if "$p/src/test" -w /dev/stderr 2>/dev/null && | |
| "$p/src/test" ! -w /dev/stderr 2>&-; then | |
| : | returns_ 1 dd 2>&- || fail=1 | |
| fi | |
| # Likewise for /dev/full, if /dev/full works. | |
| if test -w /dev/full && test -c /dev/full; then | |
| : | returns_ 1 dd 2>/dev/full || fail=1 | |
| fi | |
| Exit $fail | |