bug#76255: cat: error without arguments
Pádraig Brady <[email protected]>
| Newsgroups | gmane.comp.gnu.core-utils.bugs |
|---|---|
| Message-ID | <[email protected]> |
On 15/02/2025 06:22, Paul Eggert wrote: > On 2025-02-12 22:45, lilydjwg wrote: >> cat: -: input file is output file > > Thanks for the bug report. The symptoms you observe are a bug in 'cat'. > I also see a bug in Gawk which I reported to the Gawk maintainer > <https://lists.gnu.org/r/bug-gawk/2025-02/msg00003.html>. I don't see a > bug in zsh or fish but perhaps I'm missing something. > > To fix the 'cat' bug I installed the attached patch into bleeding-edge > Coreutils on Savannah, and something like this patch should appear in > the next release. From my TODO list, attached is a test case for this issue. I'll push this tomorrow some time. cheers, Pádraig
test-cat-self-tty-append.patch
(text/x-patch, 1 KB)
From 8771957703cf4f8d71f2d04ef0614d2aeb0c65ee Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?P=C3=A1draig=20Brady?= <[email protected]> Date: Tue, 1 Jul 2025 22:52:16 +0100 Subject: [PATCH] tests: cat: add test for O_APPEND bug fix * tests/cat/cat-self.sh: Add a test case for commit v9.6-19-g7386c291b --- tests/cat/cat-self.sh | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/tests/cat/cat-self.sh b/tests/cat/cat-self.sh index 3c171b40b..2d09fc087 100755 --- a/tests/cat/cat-self.sh +++ b/tests/cat/cat-self.sh @@ -50,4 +50,14 @@ 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 -- 2.49.0