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Kyle Evans 472ced39ef Implement a close_range(2) syscall 
close_range(min, max, flags) allows for a range of descriptors to be
closed. The Python folk have indicated that they would much prefer this
interface to closefrom(2), as the case may be that they/someone have special
fds dup'd to higher in the range and they can't necessarily closefrom(min)
because they don't want to hit the upper range, but relocating them to lower
isn't necessarily feasible.

sys_closefrom has been rewritten to use kern_close_range() using ~0U to
indicate closing to the end of the range. This was chosen rather than
requiring callers of kern_close_range() to hold FILEDESC_SLOCK across the
call to kern_close_range for simplicity.

The flags argument of close_range(2) is currently unused, so any flags set
is currently EINVAL. It was added to the interface in Linux so that future
flags could be added for, e.g., "halt on first error" and things of this
nature.

This patch is based on a syscall of the same design that is expected to be
merged into Linux.

Reviewed by:	kib, markj, vangyzen (all slightly earlier revisions)
Differential Revision:	https://reviews.freebsd.org/D21627
2020-04-12 21:23:19 +00:00
..
arpa SPDX: license IDs for some ISC-related files. 2017-12-08 15:57:29 +00:00
gssapi Add META_MODE support. 2015-06-13 19:20:56 +00:00
protocols Clean up global variable declarations in the dump and restore 2020-04-04 00:56:56 +00:00
rpc include: General further adoption of SPDX licensing ID tags. 2017-11-25 17:09:43 +00:00
rpcsvc Increase YPMAXRECORD to 16M to be compatible with Linux. 2019-08-12 20:27:33 +00:00
xlocale include: General further adoption of SPDX licensing ID tags. 2017-11-25 17:09:43 +00:00
_ctype.h include: further adoption of SPDX licensing ID tags. 2017-11-20 19:45:28 +00:00
a.out.h include: further adoption of SPDX licensing ID tags. 2017-11-20 19:45:28 +00:00
ar.h include: further adoption of SPDX licensing ID tags. 2017-11-20 19:45:28 +00:00
assert.h include: further adoption of SPDX licensing ID tags. 2017-11-20 19:45:28 +00:00
bitstring.h include: General further adoption of SPDX licensing ID tags. 2017-11-25 17:09:43 +00:00
complex.h msun: add ld80/ld128 powl, cpow, cpowf, cpowl from openbsd 2018-07-15 00:23:10 +00:00
cpio.h include: General further adoption of SPDX licensing ID tags. 2017-11-25 17:09:43 +00:00
ctype.h include: further adoption of SPDX licensing ID tags. 2017-11-20 19:45:28 +00:00
db.h include: further adoption of SPDX licensing ID tags. 2017-11-20 19:45:28 +00:00
dirent.h include: further adoption of SPDX licensing ID tags. 2017-11-20 19:45:28 +00:00
dlfcn.h Revert r343093 until I can address the issues raised by kib@. 2019-01-17 16:50:50 +00:00
elf-hints.h include: General further adoption of SPDX licensing ID tags. 2017-11-25 17:09:43 +00:00
elf.h include: General further adoption of SPDX licensing ID tags. 2017-11-25 17:09:43 +00:00
err.h Avoid implicit gcc nonnull attribute in vwarnx(). 2018-01-28 19:37:30 +00:00
fmtmsg.h include: General further adoption of SPDX licensing ID tags. 2017-11-25 17:09:43 +00:00
fnmatch.h include: further adoption of SPDX licensing ID tags. 2017-11-20 19:45:28 +00:00
fstab.h include: further adoption of SPDX licensing ID tags. 2017-11-20 19:45:28 +00:00
fts.h include: further adoption of SPDX licensing ID tags. 2017-11-20 19:45:28 +00:00
ftw.h SPDX: license IDs for some ISC-related files. 2017-12-08 15:57:29 +00:00
getopt.h include: General further adoption of SPDX licensing ID tags. 2017-11-25 17:09:43 +00:00
glob.h include: further adoption of SPDX licensing ID tags. 2017-11-20 19:45:28 +00:00
grp.h include: further adoption of SPDX licensing ID tags. 2017-11-20 19:45:28 +00:00
gssapi.h
hesiod.h SPDX: license IDs for some ISC-related files. 2017-12-08 15:57:29 +00:00
iconv.h include: General further adoption of SPDX licensing ID tags. 2017-11-25 17:09:43 +00:00
ieeefp.h People porting FreeBSD to new architectures ought not have to 2011-10-21 06:41:46 +00:00
ifaddrs.h SPDX: mostly fixes to previous changes. 2017-12-13 16:13:17 +00:00
inttypes.h include: General further adoption of SPDX licensing ID tags. 2017-11-25 17:09:43 +00:00
iso646.h include: General further adoption of SPDX licensing ID tags. 2017-11-25 17:09:43 +00:00
kenv.h include: General further adoption of SPDX licensing ID tags. 2017-11-25 17:09:43 +00:00
langinfo.h include: General further adoption of SPDX licensing ID tags. 2017-11-25 17:09:43 +00:00
libgen.h Remove basename_r(3). 2017-12-08 22:06:18 +00:00
limits.h Reduce NL_ARGMAX to 4096 to match Linux. 2018-10-04 21:55:58 +00:00
link.h include: General further adoption of SPDX licensing ID tags. 2017-11-25 17:09:43 +00:00
locale.h include: further adoption of SPDX licensing ID tags. 2017-11-20 19:45:28 +00:00
Makefile Introduce nexthop objects and new routing KPI. 2020-04-12 14:30:00 +00:00
Makefile.depend new depends 2015-06-16 23:37:19 +00:00
malloc_np.h include: General further adoption of SPDX licensing ID tags. 2017-11-25 17:09:43 +00:00
malloc.h
memory.h include: further adoption of SPDX licensing ID tags. 2017-11-20 19:45:28 +00:00
mk-osreldate.sh Move to using newvers -c instead of VARS_ONLY=1 2019-05-23 17:19:05 +00:00
monetary.h include: General further adoption of SPDX licensing ID tags. 2017-11-25 17:09:43 +00:00
mpool.h include: further adoption of SPDX licensing ID tags. 2017-11-20 19:45:28 +00:00
mqueue.h include: General further adoption of SPDX licensing ID tags. 2017-11-25 17:09:43 +00:00
ndbm.h include: further adoption of SPDX licensing ID tags. 2017-11-20 19:45:28 +00:00
netconfig.h netconfig.h: sync with upstream. 2017-11-27 17:18:31 +00:00
netdb.h Fix mismatch from r342379. 2018-12-23 20:51:13 +00:00
nl_types.h include: General further adoption of SPDX licensing ID tags. 2017-11-25 17:09:43 +00:00
nlist.h include: further adoption of SPDX licensing ID tags. 2017-11-20 19:45:28 +00:00
nss.h include: General further adoption of SPDX licensing ID tags. 2017-11-25 17:09:43 +00:00
nsswitch.h include: General further adoption of SPDX licensing ID tags. 2017-11-25 17:09:43 +00:00
paths.h include: further adoption of SPDX licensing ID tags. 2017-11-20 19:45:28 +00:00
printf.h include: General further adoption of SPDX licensing ID tags. 2017-11-25 17:09:43 +00:00
proc_service.h include: General further adoption of SPDX licensing ID tags. 2017-11-25 17:09:43 +00:00
pthread_np.h Add pthread_peekjoin_np(3). 2020-02-15 23:25:39 +00:00
pthread.h POSIX compliance improvements in the pthread(3) functions. 2018-08-18 01:05:38 +00:00
pwd.h include: further adoption of SPDX licensing ID tags. 2017-11-20 19:45:28 +00:00
ranlib.h include: further adoption of SPDX licensing ID tags. 2017-11-20 19:45:28 +00:00
readpassphrase.h SPDX: license IDs for some ISC-related files. 2017-12-08 15:57:29 +00:00
regex.h include: further adoption of SPDX licensing ID tags. 2017-11-20 19:45:28 +00:00
res_update.h SPDX: license IDs for some ISC-related files. 2017-12-08 15:57:29 +00:00
resolv.h SPDX: license IDs for some ISC-related files. 2017-12-08 15:57:29 +00:00
runetype.h include: further adoption of SPDX licensing ID tags. 2017-11-20 19:45:28 +00:00
search.h Improve typing of POSIX search tree functions. 2016-10-13 18:25:40 +00:00
semaphore.h include: General further adoption of SPDX licensing ID tags. 2017-11-25 17:09:43 +00:00
setjmp.h include: further adoption of SPDX licensing ID tags. 2017-11-20 19:45:28 +00:00
signal.h Add sigsetop extensions commonly found in musl libc and glibc 2019-12-12 01:41:55 +00:00
spawn.h include: General further adoption of SPDX licensing ID tags. 2017-11-25 17:09:43 +00:00
stab.h include: further adoption of SPDX licensing ID tags. 2017-11-20 19:45:28 +00:00
stdalign.h include: General further adoption of SPDX licensing ID tags. 2017-11-25 17:09:43 +00:00
stdbool.h include: General further adoption of SPDX licensing ID tags. 2017-11-25 17:09:43 +00:00
stddef.h include: further adoption of SPDX licensing ID tags. 2017-11-20 19:45:28 +00:00
stdio.h libc: provide fputc_unlocked 2020-02-02 19:45:12 +00:00
stdlib.h rand(3): Replace implementation with one backed by random(3) algorithm 2020-02-01 20:33:23 +00:00
stdnoreturn.h include: General further adoption of SPDX licensing ID tags. 2017-11-25 17:09:43 +00:00
string.h include: further adoption of SPDX licensing ID tags. 2017-11-20 19:45:28 +00:00
stringlist.h include: General further adoption of SPDX licensing ID tags. 2017-11-25 17:09:43 +00:00
strings.h include: General further adoption of SPDX licensing ID tags. 2017-11-25 17:09:43 +00:00
sysexits.h include: further adoption of SPDX licensing ID tags. 2017-11-20 19:45:28 +00:00
tar.h include: further adoption of SPDX licensing ID tags. 2017-11-20 19:45:28 +00:00
termios.h include: further adoption of SPDX licensing ID tags. 2017-11-20 19:45:28 +00:00
tgmath.h include: General further adoption of SPDX licensing ID tags. 2017-11-25 17:09:43 +00:00
time.h Correctly check for C++17 and higher when declaring timespec_get() 2019-12-09 19:17:56 +00:00
timeconv.h include: further adoption of SPDX licensing ID tags. 2017-11-20 19:45:28 +00:00
timers.h include: General further adoption of SPDX licensing ID tags. 2017-11-25 17:09:43 +00:00
ttyent.h Improve missing tty handling in init(8). This removes a check that did 2018-02-27 10:54:15 +00:00
uchar.h include: General further adoption of SPDX licensing ID tags. 2017-11-25 17:09:43 +00:00
ulimit.h include: General further adoption of SPDX licensing ID tags. 2017-11-25 17:09:43 +00:00
unistd.h Implement a close_range(2) syscall 2020-04-12 21:23:19 +00:00
unwind.h SPDX: license IDs for some ISC-related files. 2017-12-08 15:57:29 +00:00
utime.h include: further adoption of SPDX licensing ID tags. 2017-11-20 19:45:28 +00:00
utmpx.h include: General further adoption of SPDX licensing ID tags. 2017-11-25 17:09:43 +00:00
uuid.h include: General further adoption of SPDX licensing ID tags. 2017-11-25 17:09:43 +00:00
varargs.h We don't support gcc < 4.2.1, so varargs.h now is just #error 2018-02-12 14:48:14 +00:00
wchar.h SPDX: license IDs for some ISC-related files. 2017-12-08 15:57:29 +00:00
wctype.h include: General further adoption of SPDX licensing ID tags. 2017-11-25 17:09:43 +00:00
wordexp.h include: General further adoption of SPDX licensing ID tags. 2017-11-25 17:09:43 +00:00
xlocale.h include: General further adoption of SPDX licensing ID tags. 2017-11-25 17:09:43 +00:00