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File _service:tar_scm_kernel_repo:backport-tail-fix-support-for-F-with-non-seekable-files.patch of Package coreutils
From c0c63e9735908a9579f8735001957db6bd81afc3 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?P=C3=A1draig=20Brady?= <P@draigBrady.com> Date: Mon, 30 Jan 2023 21:44:10 +0000 Subject: [PATCH] tail: fix support for -F with non seekable files This was seen to be an issue when following a symlink that was being updated to point to different underlying devices. * src/tail.c (recheck): Guard the lseek() call to only be performed for regular files. * NEWS: Mention the bug fix. Reference:https://github.com/coreutils/coreutils/commit/c0c63e9735908a9579f8735001957db6bd81afc3 Conflict:NEWS Context adapation --- NEWS | 4 ++++ src/tail.c | 3 ++- 2 files changed, 6 insertions(+), 1 deletion(-) diff --git a/NEWS b/NEWS index b65bc85..f65eb95 100644 --- a/NEWS +++ b/NEWS @@ -3,6 +3,10 @@ GNU coreutils NEWS -*- outline -*- * Noteworthy changes in release 9.0 (2021-09-24) [stable] ** Bug fixes + tail --follow=name works again with non seekable files. Previously it + exited with an "Illegal seek" error when such a file was replaced. + [bug introduced in fileutils-4.1.6] + cp, mv, and install now handle ENOENT failures across CIFS file systems, falling back from copy_file_range to a better supported standard copy. [issue introduced in coreutils-9.0] diff --git a/src/tail.c b/src/tail.c index 2244509dd..03061e8bf 100644 --- a/src/tail.c +++ b/src/tail.c @@ -1122,7 +1122,8 @@ recheck (struct File_spec *f, bool blocking) { /* Start at the beginning of the file. */ record_open_fd (f, fd, 0, &new_stats, (is_stdin ? -1 : blocking)); - xlseek (fd, 0, SEEK_SET, pretty_name (f)); + if (S_ISREG (new_stats.st_mode)) + xlseek (fd, 0, SEEK_SET, pretty_name (f)); } } -- 2.27.0
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