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