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| author | Paul Eggert <eggert@cs.ucla.edu> | 2025-07-29 09:37:44 -0700 |
|---|---|---|
| committer | Paul Eggert <eggert@cs.ucla.edu> | 2025-08-03 19:48:05 -0700 |
| commit | 10aa908ebd8d487f0dbbc77abb317a94d33f460d (patch) | |
| tree | 5d6964c363261a1793b7045f523be38b699bd982 | |
| parent | tail: refactor SEEK_END and lines (diff) | |
| download | coreutils-10aa908ebd8d487f0dbbc77abb317a94d33f460d.tar.gz coreutils-10aa908ebd8d487f0dbbc77abb317a94d33f460d.zip | |
tail: optimize tail -n +2**63
* src/tail.c (tail_lines): Also optimize ‘tail -n +N’
on a seekable file, where OFF_T_MAX <= N < UINTMAX_MAX.
Of course this is very unlikely.
| -rw-r--r-- | src/tail.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/src/tail.c b/src/tail.c index 4715bd1d8..db6aea4a0 100644 --- a/src/tail.c +++ b/src/tail.c @@ -1955,7 +1955,7 @@ tail_lines (char const *pretty_filename, int fd, struct stat const *st, { /* If skipping all input use lseek if possible, for speed. */ off_t pos; - if (n_lines == UINTMAX_MAX && 0 <= (pos = lseek (fd, 0, SEEK_END))) + if (OFF_T_MAX <= n_lines && 0 <= (pos = lseek (fd, 0, SEEK_END))) *read_pos = pos; else { |