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dd532ad13371dcabc07d05052a7a256fc83c6ead
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Jitendra Bhati dd532ad133 fts: reduce fd usage by storing fts_dirfd on directory entries only 
Previously fts_build() called _dup(_dirfd(dirp)) for every child
entry, holding N simultaneous fds for a directory with N children.

Redefine fts_dirfd: instead of a fd for the entry's parent
directory, it is now a fd for the entry itself, set only for
directory entries. One dup per directory in fts_build() instead
of one per child.  Close fts_dirfd during the directory post-order
visit, before advancing to its sibling.

To access a file using fd-relative operations, callers should use
openat(ent->fts_parent->fts_dirfd, ent->fts_name, ...) instead of
openat(ent->fts_dirfd, ent->fts_name, ...).  The fd is valid until the
directory's post-order visit (FTS_DP).

Reported by:    Mark Johnston <[email protected]>
Fixes:          4bd01d6ae0 (fts: refactor to use fd-relative operations)
Sponsored by:   Google LLC (GSoC 2026)
Reviewed by:	asomers
Pull Request:	https://github.com/freebsd/freebsd-src/pull/2360
2026-08-10 10:14:16 -06:00
..
arm
Add sys/_align.h replacing machine/_align.h
2025-12-10 10:57:50 +00:00
arpa
Remove residual blank line at start of Makefile
2024-07-15 16:43:39 -06:00
gssapi
Remove residual blank line at start of Makefile
2024-07-15 16:43:39 -06:00
i386
include/i386: fix release builds
2022-06-13 21:37:34 +01:00
protocols
Remove residual blank line at start of Makefile
2024-07-15 16:43:39 -06:00
rpc
rpc: correct resultproc_t's type
2026-02-02 21:20:16 +00:00
rpcsvc
rpcsvc: Remove obsolete bool definition from yp_prot.h
2026-05-30 15:43:51 +02:00
ssp
tests: fix remaining test failures under _FORTIFY_SOURCE
2026-04-30 21:58:48 -05:00
xlocale
Remove residual blank line at start of Makefile
2024-07-15 16:43:39 -06:00
_ctype.h
include: Remove ancient SCCS tags.
2023-11-26 22:23:28 -07:00
a.out.h
include: Remove ancient SCCS tags.
2023-11-26 22:23:28 -07:00
ar.h
include: Remove ancient SCCS tags.
2023-11-26 22:23:28 -07:00
assert.h
libc: Fix assert() sanitiser for C++ contextual bool conversion
2026-06-10 18:14:32 +02:00
bitstring.h
Remove $FreeBSD$: two-line .h pattern
2023-08-16 11:54:16 -06:00
byteswap.h
byteswap.h: Add a glibc/linux compatible byteswap.h
2023-01-20 16:37:39 -07:00
complex.h
Remove $FreeBSD$: two-line .h pattern
2023-08-16 11:54:16 -06:00
cpio.h
Remove $FreeBSD$: two-line .h pattern
2023-08-16 11:54:16 -06:00
ctype.h
include: Remove ancient SCCS tags.
2023-11-26 22:23:28 -07:00
db.h
include: Remove ancient SCCS tags.
2023-11-26 22:23:28 -07:00
dirent.h
Revert "libc: Remove readdir_r(3)"
2025-09-11 17:12:22 +02:00
dlfcn.h
Don't rely on sys/_types.h including sys/cdefs.h
2025-06-11 17:39:01 +01:00
elf-hints.h
Remove $FreeBSD$: two-line .h pattern
2023-08-16 11:54:16 -06:00
elf.h
Remove $FreeBSD$: two-line .h pattern
2023-08-16 11:54:16 -06:00
endian.h
endian.h: Update comments now that POSIX Issue 8 is POSIX.1-2024
2024-12-30 13:38:39 -07:00
err.h
include: Remove ancient SCCS tags.
2023-11-26 22:23:28 -07:00
exterr.h
libc: improve include usage for exterror sources
2026-02-18 09:54:01 +02:00
fmtmsg.h
Remove $FreeBSD$: two-line .h pattern
2023-08-16 11:54:16 -06:00
fnmatch.h
include: Remove ancient SCCS tags.
2023-11-26 22:23:28 -07:00
fstab.h
include: Remove ancient SCCS tags.
2023-11-26 22:23:28 -07:00
fts.h
fts: reduce fd usage by storing fts_dirfd on directory entries only
2026-08-10 10:14:16 -06:00
ftw.h
Remove $FreeBSD$: two-line .h pattern
2023-08-16 11:54:16 -06:00
getopt.h
Remove $FreeBSD$: one-line .c comment pattern
2023-08-16 11:54:29 -06:00
glob.h
glob.h: Limit glob_b prototype visibility
2025-06-03 22:59:28 +02:00
grp.h
include: Remove ancient SCCS tags.
2023-11-26 22:23:28 -07:00
gssapi.h
Remove $FreeBSD$: one-line .c comment pattern
2023-08-16 11:54:29 -06:00
hesiod.h
Remove $FreeBSD$: one-line .c comment pattern
2023-08-16 11:54:29 -06:00
iconv.h
iconv: Update availability of bool
2026-06-22 15:23:48 +02:00
ieeefp.h
Remove $FreeBSD$: one-line .c comment pattern
2023-08-16 11:54:29 -06:00
ifaddrs.h
Remove $FreeBSD$: one-line .c comment pattern
2023-08-16 11:54:29 -06:00
inttypes.h
Remove $FreeBSD$: two-line .h pattern
2023-08-16 11:54:16 -06:00
iso646.h
Remove $FreeBSD$: two-line .h pattern
2023-08-16 11:54:16 -06:00
kenv.h
Remove $FreeBSD$: two-line .h pattern
2023-08-16 11:54:16 -06:00
langinfo.h
Remove $FreeBSD$: two-line .h pattern
2023-08-16 11:54:16 -06:00
libgen.h
Remove $FreeBSD$: one-line .c comment pattern
2023-08-16 11:54:29 -06:00
limits.h
Add POSIX NSIG_MAX & _SC_NSIG
2025-06-11 17:16:20 -06:00
link.h
Remove $FreeBSD$: two-line .h pattern
2023-08-16 11:54:16 -06:00
locale.h
include: Remove ancient SCCS tags.
2023-11-26 22:23:28 -07:00
Makefile
coreboot: Add coreboot firmware table driver
2026-07-29 12:12:41 -07:00
Makefile.depend
Update Makefile.depend files
2024-10-14 10:26:17 -07:00
Makefile.inc
pkgbase: Move headers and libs out of runtime and utilities
2023-09-12 13:22:21 +01:00
malloc_np.h
Remove $FreeBSD$: two-line .h pattern
2023-08-16 11:54:16 -06:00
malloc.h
Remove $FreeBSD$: one-line .h pattern
2023-08-16 11:54:23 -06:00
memory.h
include: Remove ancient SCCS tags.
2023-11-26 22:23:28 -07:00
mk-osreldate.sh
Remove $FreeBSD$: one-line sh pattern
2023-08-16 11:55:03 -06:00
monetary.h
Remove $FreeBSD$: two-line .h pattern
2023-08-16 11:54:16 -06:00
mpool.h
include: Remove ancient SCCS tags.
2023-11-26 22:23:28 -07:00
mqueue.h
include: Automated cleanup of cdefs and other formatting
2023-11-26 22:23:59 -07:00
ndbm.h
include: Remove ancient SCCS tags.
2023-11-26 22:23:28 -07:00
netconfig.h
Remove $FreeBSD$: one-line .c comment pattern
2023-08-16 11:54:29 -06:00
netdb.h
include: Remove ancient SCCS tags.
2023-11-26 22:23:28 -07:00
nl_types.h
Revert "nl_types.h: explicitly include cdefs.h"
2024-01-24 22:50:49 -05:00
nlist.h
include: Remove ancient SCCS tags.
2023-11-26 22:23:28 -07:00
nss.h
Remove $FreeBSD$: two-line .h pattern
2023-08-16 11:54:16 -06:00
nsswitch.h
Remove $FreeBSD$: one-line .c comment pattern
2023-08-16 11:54:29 -06:00
ossfuzz.h
vendor/bc: upgrade to version 7.0.0
2024-08-26 18:27:29 +02:00
paths.h
zzz: Rewrite to use new power device
2026-05-27 00:05:45 +01:00
printf.h
Remove $FreeBSD$: two-line .h pattern
2023-08-16 11:54:16 -06:00
proc_service.h
Remove $FreeBSD$: two-line .h pattern
2023-08-16 11:54:16 -06:00
pthread_np.h
libthr: add pthread_tryjoin_np()
2026-01-19 18:49:57 +02:00
pthread.h
libthr: implement pthread_cond_clockwait(3)
2026-07-27 19:17:28 +03:00
pwd.h
include: Remove ancient SCCS tags.
2023-11-26 22:23:28 -07:00
ranlib.h
include: Remove ancient SCCS tags.
2023-11-26 22:23:28 -07:00
readpassphrase.h
Remove $FreeBSD$: one-line .c comment pattern
2023-08-16 11:54:29 -06:00
regex.h
include: Remove ancient SCCS tags.
2023-11-26 22:23:28 -07:00
res_update.h
Remove $FreeBSD$: one-line .h pattern
2023-08-16 11:54:23 -06:00
resolv.h
resolv.h: Remove unused parts
2026-07-06 14:23:50 +02:00
runetype.h
include: Remove ancient SCCS tags.
2023-11-26 22:23:28 -07:00
sched.h
include: Automated cleanup of cdefs and other formatting
2023-11-26 22:23:59 -07:00
search.h
libc: add glibc-compatible tdestroy(3)
2025-12-29 19:18:55 +02:00
semaphore.h
Remove $FreeBSD$: two-line .h pattern
2023-08-16 11:54:16 -06:00
setjmp.h
include: Remove ancient SCCS tags.
2023-11-26 22:23:28 -07:00
signal.h
include: ssp: fortify <signal.h>
2025-06-11 17:16:22 -06:00
spawn.h
posix_spawn: actions chdir and fchdir are now required by POSIX
2026-04-03 11:22:53 +03:00
stab.h
include: Remove ancient SCCS tags.
2023-11-26 22:23:28 -07:00
stdalign.h
libc: Suppress <stdalign.h> content for C23 and later
2026-06-10 18:14:32 +02:00
stdbit.h
include/stdbit.h: declare size_t, (u)int*_t, and (u)int_least*_t
2026-04-20 22:59:54 +02:00
stdbool.h
stdbool.h: Update for C23
2026-01-06 20:26:59 -05:00
stdckdint.h
include/stdckdint.h: make the header compatible with C++
2025-10-18 00:48:30 +03:00
stddef.h
stddef.h: centralize definition of offsetof()
2026-02-19 15:10:32 +00:00
stdio.h
sys: add renameat2(2) syscall
2026-03-06 01:46:53 +02:00
stdlib.h
libc: Add strfromd, strfromf, and strfroml per C23
2026-08-02 14:10:02 +02:00
stdnoreturn.h
Remove $FreeBSD$: two-line .h pattern
2023-08-16 11:54:16 -06:00
string.h
libc/string: add strdupa(3) and strndupa(3)
2025-12-09 00:34:57 +02:00
stringlist.h
include: Automated cleanup of cdefs and other formatting
2023-11-26 22:23:59 -07:00
strings.h
include: ssp: round out fortification of current set of headers
2024-07-13 00:16:24 -05:00
sysexits.h
sysexits: Tidy deprecated header and manual
2024-05-09 20:50:48 -06:00
tar.h
include: Remove ancient SCCS tags.
2023-11-26 22:23:28 -07:00
termios.h
include: Remove ancient SCCS tags.
2023-11-26 22:23:28 -07:00
tgmath.h
Remove $FreeBSD$: two-line .h pattern
2023-08-16 11:54:16 -06:00
time.h
time.h: add timegm() to the C23 namespace
2025-11-28 16:19:40 +01:00
timeconv.h
include: Remove ancient SCCS tags.
2023-11-26 22:23:28 -07:00
timers.h
Remove $FreeBSD$: two-line .h pattern
2023-08-16 11:54:16 -06:00
ttyent.h
include: Remove ancient SCCS tags.
2023-11-26 22:23:28 -07:00
uchar.h
uchar.h: add char8_t
2025-11-28 16:19:53 +01:00
ulimit.h
Remove $FreeBSD$: two-line .h pattern
2023-08-16 11:54:16 -06:00
unistd.h
libc: add freadlink(3)
2026-05-10 17:53:20 +03:00
utime.h
include: Remove ancient SCCS tags.
2023-11-26 22:23:28 -07:00
utmpx.h
Remove $FreeBSD$: two-line .h pattern
2023-08-16 11:54:16 -06:00
uuid.h
Remove $FreeBSD$: two-line .h pattern
2023-08-16 11:54:16 -06:00
varargs.h
Remove $FreeBSD$: two-line .h pattern
2023-08-16 11:54:16 -06:00
wchar.h
sys/_stdarg.h: drop cdefs.h and _types.h polution
2025-06-11 17:39:02 +01:00
wctype.h
Remove $FreeBSD$: one-line .h pattern
2023-08-16 11:54:23 -06:00
wordexp.h
Remove $FreeBSD$: two-line .h pattern
2023-08-16 11:54:16 -06:00
xlocale.h
Remove "All Rights Reserved" from FreeBSD Foundation copyrights
2024-07-30 12:16:36 -04:00