src/usr.bin/diff/diffdir.c, branch main

diff: Improve directory loop detection

2026-02-11T16:24:54Z

When we're done processing a directory, remove its entry from the tree of visited inodes, ensuring that we only report a loop when we encounter a descendant-to-ancestor link, not when we encounter a cousin-to-cousin or sibling-to-sibling link. MFC after: 1 week Reported by: Bakul Shah Sponsored by: Klara, Inc. Reviewed by: kevans Differential Revision: https://reviews.freebsd.org/D55248

diff: Fix build

2026-02-05T15:26:01Z

rc must be defined first. Fixes: 590126789c84 MFC after: 1 week X-MFC with: 590126789c84

diff: Don't compare a file or directory to itself

2026-02-05T14:39:57Z

While here, stop abusing struct dirent for something we don't even need to store. PR: 254455 MFC after: 1 week Sponsored by: Klara, Inc. Reviewed by: thj, kevans Differential Revision: https://reviews.freebsd.org/D55113

libc: Rename fscandir{,_b}() to fdscandir{,_b}().

2025-06-23T13:03:10Z

This seems to fit the pattern better (e.g. fdopendir()). I've added weak references to ease the transition, but since it's only been a few days, we can remove them (and the ObsoleteFiles entries for the manual pages) before we branch stable/15. Fixes: deeebfdecab5 Sponsored by: Klara, Inc. Reviewed by: kevans Differential Revision: https://reviews.freebsd.org/D50980

diff: Fix gcc build.

2025-06-20T15:42:40Z

diff: Detect loops when diffing directories.

2025-06-20T11:10:35Z

Sponsored by: Klara, Inc. Reviewed by: markj Differential Revision: https://reviews.freebsd.org/D50936

diff: Sort headers.

2024-05-03T15:03:50Z

MFC after: 1 week Sponsored by: Klara, Inc. Reviewed by: markj Differential Revision: https://reviews.freebsd.org/D45078

diff: Integrate libdiff from OpenBSD GoT.

2024-03-27T10:03:33Z

This adds support for two new diff algorithms, Myers diff and Patience diff. These algorithms perform a different form of search compared to the classic Stone algorithm and support escapes when worst case scenarios are encountered. Add the -A flag to allow selection of the algorithm, but default to using the new Myers diff implementation. The libdiff implementation currently only supports a subset of input and output options supported by diff. When these options are used, but the algorithm is not selected, automatically fallback to the classic Stone algorithm until support for these modes can be added. Based on work originally done by thj@ with contributions from kevans@. Sponsored by: Klara, Inc. Reviewed by: thj Differential Revision: https://reviews.freebsd.org/D44302

Remove $FreeBSD$: one-line .c pattern

2023-08-16T17:54:42Z

Remove /^[\s*]*__FBSDID$"\$FreeBSD\$"$;?\s*\n/

diff: fix failed compare when ignoring file case

2022-02-18T15:51:38Z

With --ignore-file-name-case we need to compare files regardless of case. We need to propigate both names down to diffit so we can look up the correct file when the names differ based on case, otherwise we try to look up the file using the case from the a tree which might not be discoverable if its case is different in the b tree. Reviewed by: bapt Sponsored by: Klara Inc. Differential Revision: https://reviews.freebsd.org/D34201