coreutils/tests/fold, branch v9.8

tests: avoid false failure on older Linux kernels

2025-09-21T15:37:26Z

* tests/fold/fold-zero-width.sh: Check the shell was able to create the redirection file, as intermittently on CentOS 5,6,7 this wasn't the case, with the shell giving an xmalloc failure due to the ulimit. Reported by William Bader and Bruno Haible.

tests: fold: avoid false failures on Solaris 10

2025-09-20T21:12:58Z

* tests/fold/fold-characters.sh: Ensure we have independent verification of the width of characters before testing based on those widths. * tests/fold/fold-zero-width.sh: Likewise. * tests/fold/fold.pl: Only compare the exit status, as the error message can be translated.

tests: avoid false failure on CentOS 5,6,7

2025-09-20T15:17:43Z

* tests/fold/fold-zero-width.sh: Increase vm limit to avoid failures on CentOS 5,6,7. Match the limit used in write-errors.sh as per commit v9.5-255-g0bd149403

tests: fix issues with fold-characters.sh test

2025-09-17T14:32:47Z

This was noticed with: trap '' PIPE && # Ignore SIGPIPE make check TESTS=tests/fold/fold-characters.sh SUBDIRS=. * tests/fold/fold-characters.sh: Move memory limit test to ... * tests/misc/write-errors.sh: ... which avoids "write error" messages on stderr due to the ignored SIGPIPE. It also protects the fold invocation with a timeout(1) so that fold implementations that don't exit promptly upon write error don't hang the test suite (Like we would have done before commit v9.7-311-gc95c7ee76).

fold: fix write error checks with invalid multi-byte input

2025-09-16T17:41:51Z

* src/fold.c (write_out): A new helper to check all writes. (fold-file): Use write_out() for all writes. * tests/fold/fold-zero-width.sh: Adjust to writing more data in various patterns, rather than two buffers of NULs. This is a more robust memory bound check, and the '\303' case tests this particular logic change. * NEWS: fold now exits immediately, not just promptly.

tests: fold/fold-zero-width.sh: avoid false failure with ENOSPC

2025-09-16T13:00:44Z

* tests/fold/fold-zero-width.sh: Check relatively large test file is created appropriately. Also apply more idomatic wc -l usage.

fold: fix out of bounds write with zero width characters

2025-09-16T03:55:56Z

* src/fold.c (fold_file): Prefer putchar ('\n') to copying characters. If we do not have room in the output buffer print it since it is not a full line of text. * tests/fold/fold-zero-width.sh: New test case. * tests/local.mk (all_tests): Add it.

tests: fold: check if multi-byte spaces are treated as blank

2025-09-05T02:48:37Z

This avoids a test failure on FreeBSD 14, MacOS 15, and musl. Fix suggested by Pádraig Brady in: . * tests/fold/fold-spaces.sh (isblank): New function. Only run the tests if the character is treated as blank. Fixes https://bugs.gnu.org/79301

fold: fix handling of invalid multi-byte characters

2025-08-29T01:57:13Z

* src/fold.c (fold_file): Continue the loop when we have buffered bytes but nothing left to read from the file. (adjust_column): Don't assume that the character is printable. * tests/fold/fold-characters.sh: Add a new test case. (bad_unicode): New function.

tests: fold: add tests for multi-byte width

2025-08-27T15:41:07Z

* tests/fold/fold.pl: The i18n patch didn't actually test folding of multi-byte characters, so add tests for various multi-byte forms.