| # Check that cat operates correctly when the input is the same as the output. | |
| # Copyright 2014-2025 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/>. | |
| . "${srcdir=.}/tests/init.sh"; path_prepend_ ./src | |
| print_ver_ cat | |
| echo x >out || framework_failure_ | |
| echo x >out1 || framework_failure_ | |
| returns_ 1 cat out >>out || fail=1 | |
| compare out out1 || fail=1 | |
| # This example is taken from the POSIX spec for 'cat'. | |
| echo x >doc || framework_failure_ | |
| echo y >doc.end || framework_failure_ | |
| cat doc doc.end >doc || fail=1 | |
| compare doc doc.end || fail=1 | |
| # This terminates even though it copies a file to itself. | |
| # Coreutils 9.5 and earlier rejected this. | |
| echo x >fx || framework_failure_ | |
| echo y >fy || framework_failure_ | |
| cat fx fy >fxy || fail=1 | |
| for i in 1 2; do | |
| cat fx >fxy$i || fail=1 | |
| done | |
| for i in 3 4 5 6; do | |
| cat fx >fx$i || fail=1 | |
| done | |
| cat - fy <fxy1 1<>fxy1 || fail=1 | |
| compare fxy fxy1 || fail=1 | |
| cat fxy2 fy 1<>fxy2 || fail=1 | |
| compare fxy fxy2 || fail=1 | |
| returns_ 1 cat fx fx3 1<>fx3 || fail=1 | |
| returns_ 1 cat - fx4 <fx 1<>fx4 || fail=1 | |
| returns_ 1 cat fx5 >>fx5 || fail=1 | |
| returns_ 1 cat <fx6 >>fx6 || fail=1 | |
| # coreutils 9.6 would fail with a plain cat if the tty was in append mode | |
| # Simulate with a regular file to simplify | |
| echo foo > file || framework_failure_ | |
| # Set fd 3 at EOF | |
| exec 3< file && cat <&3 > /dev/null || framework_failure_ | |
| # Set fd 4 in append mode | |
| exec 4>> file || framework_failure_ | |
| cat <&3 >&4 || fail=1 | |
| exec 3<&- 4>&- | |
| Exit $fail | |