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git://sourceware.org/git/glibc.git
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Adhemerval Zanella
99303f3871
This patch synchronizes the glibc fts implementation with the latest version from gnulib (as of 2026-02-16). The primary motivation is to address limitations in the legacy glibc implementation, most notably BZ 22944, where fts fails with an ENAMETOOLONG error when traversing very long paths or deeply nested directory trees. The gnulib implementation dynamically reallocates path buffers and uses openat/fchdir optimizations, effectively lifting the MAXPATHLEN limitation. The gnulib implementation also added extra features, which are used by different GNU projects (coreutils, diffutils): * FTS_TIGHT_CYCLE_CHECK: used to enable a strict, immediate cycle-detection algorithm during a file system traversal. This is done internally using a hash table: every time the traversal enters a directory, it records the directory's device and inode (dev/ino) pair in the hash table, and before entering any directory, fts checks the hash table. * FTS_CWDFD: instead of actually changing the process's current working directory, it maintains a virtual current working directory using file descriptors. The file descriptor is store at the fts_cwd_fd field and all subsequent file operations are performed relative to this file descriptor using *at functions. * FTS_DEFER_STAT: performance-oriented flag that instructs the file tree traversal engine to delay fetching file metadata. When the flag is used, fts skips the immediate stat call. Instead, it marks the entry with a special internal state (FTS_NSOK and FTS_STAT_REQUIRED). The actual stat call is pushed down the line and executed by fts_read right before the application actually accesses the entry. * FTS_VERBATIM: fts_open accept and use the path strings exactly as they were provided in the arguments array without slash trimming. * FTS_MOUNT: it restrict the file tree walk to a single file system. Hopefully,it would allow some GNU projects to use the glibc implementation instead of pulling the gnulib one. It requires some changes to keep compatibility, compared to gnulib: * The new required fields are added at the end of FTS structure, and the new FTS flags are adjusted to avoid change FTS_NAMEONLY/FTS_STOP (even though they are marked as private). * The FTSENT uses a flexible array (fts_name), so two adjustments are required: the two new members (fts_fts and fts_dirp) are place *before* the struct and the fts_statp is now always allocated and accounted (the gnulib implementation uses an alwyas allocated member). Checked on x86_64-linux-gnu and i686-linux-gnu.
48 lines
1.3 KiB
C
48 lines
1.3 KiB
C
/* Finding the next prime >= a given small integer.
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Copyright (C) 1995-2026 Free Software Foundation, Inc.
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This file is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as
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published by the Free Software Foundation; either version 2.1 of the
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License, or (at your option) any later version.
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This file is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>. */
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#ifndef _GL_NEXT_PRIME_H
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#define _GL_NEXT_PRIME_H
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/* This file uses _GL_ATTRIBUTE_CONST. */
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#if !_LIBC && !_GL_CONFIG_H_INCLUDED
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#error "Please include config.h first."
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#endif
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#include <stddef.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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#ifdef _LIBC
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# define next_prime __next_prime
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#else
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# define attribute_hidden
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#endif
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/* Round a given CANDIDATE number up to the nearest prime, and return that
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prime. Primes lower than 10 are merely skipped. */
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extern size_t _GL_ATTRIBUTE_CONST next_prime (size_t candidate)
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attribute_hidden;;
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#ifdef __cplusplus
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}
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#endif
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#endif /* _GL_NEXT_PRIME_H */
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