epoll_ctl.2: epoll instances can be nested to a maximum depth of 5

This limit appears to be an off-by-one count against
EP_MAX_NESTS (4).

Verified by experiment.

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

epoll_ctl.2: Move some version info from CONFORMING TO to VERSIONS

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

recv.2, send.2: Add cross references to pages with further info about ancillary data

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

man.7: srcfix

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

man.7: Clarify that alternating typeface macros print arguments without spaces

Reported-by: G. Branden Robinson <g.branden.robinson@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

socket.7: ffix

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

socket.7: SEE ALSO: add ipv6(7)

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

send.2: wfix

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

mmap.2, proc.5, bpf-helpers.7, cpuset.7: tfix

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

system_data_types.7: Trim "See also" list of 'off_t'

Trim the list to just be a representative sample of
the APIs that use 'off_t'.

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

off_t.3: New link to system_data_types(7)

Signed-off-by: Alejandro Colomar <colomar.6.4.3@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

system_data_types.7: Add 'off_t'

Signed-off-by: Alejandro Colomar <colomar.6.4.3@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

system_data_types.7: tfix: Oxford comma

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

system_data_types.7: tfix: remove mention of __uint128_t and __int128_t types

Those types won't appear in this page.

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

Revert [u]int_*astN_t commits

Revert "uint_least8_t.3, uint_least16_t.3, uint_least32_t.3, uint_least64_t.3, uint_leastN_t.3: New links to system_data_types(7)"
This reverts commit a5d13a32b79508c3224b678c67c1d5bcec0dd78e.

Revert "system_data_types.7: Add uint_leastN_t family of types"
This reverts commit 3450a5621e2a0bbba96add77002d5bf92412fd80.

Revert "int_least8_t.3, int_least16_t.3, int_least32_t.3, int_least64_t.3, int_leastN_t.3: New links to system_data_types(7)"
This reverts commit 876838354df6f32a3ba6c91698bdd8fb25e8167b.

Revert "system_data_types.7: Add int_leastN_t family of types"
This reverts commit f9b54d3a2eb5da554f9c6979b588fec534082586.

Revert "uint_fast8_t.3, uint_fast16_t.3, uint_fast32_t.3, uint_fast64_t.3, uint_fastN_t.3: New links to system_data_types(7)"
This reverts commit 496b1aad79db5662cac02b4a2c51851c8b37a5c5.

Revert "system_data_types.7: Add uint_fastN_t family of types"
This reverts commit 3c9ae6e5a264f1346260931132661cceb74f2539.

Revert "int_fast8_t.3, int_fast16_t.3, int_fast32_t.3, int_fast64_t.3, int_fastN_t.3: New links to system_data_types(7)"
This reverts commit 9df81a23e563ca1e65aafaaec981321816e35f25.

Revert "system_data_types.7: Add int_fastN_t family of types"
This reverts commit 8f12d3f6838e1b65e872211286cb33418953a94d.

Reported-by: Michael Kerrisk <mtk.manpages@gmail.com>
Signed-off-by: Alejandro Colomar <colomar.6.4.3@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

system_data_types.7: Move notes about versions to "Versions"

Signed-off-by: Alejandro Colomar <colomar.6.4.3@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

void.3: New link to system_data_types(7)

Signed-off-by: Alejandro Colomar <colomar.6.4.3@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

system_data_types.7: Add 'void *'

Reported-by: Paul Eggert <eggert@cs.ucla.edu>
Reported-by: David Laight <David.Laight@ACULAB.COM>
Reported-by: Jonathan Wakely <jwakely.gcc@gmail.com>
Reported-by: Paul Eggert <eggert@cs.ucla.edu>
Signed-off-by: Alejandro Colomar <colomar.6.4.3@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

system_data_types.7: Remove duplicate reference

Signed-off-by: Alejandro Colomar <colomar.6.4.3@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

strsignal.3: Note that 'sys_siglist' is nonstandard

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

strsignal.3: Note that starting with v2.32, glibc no longer exports 'sys_siglist'

Reported-by: Hauke Fath <hf@spg.tu-darmstadt.de>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

sys_siglist.3: New link to strsignal(3)

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

psignal.3, strsignal.3: Consolidate information on 'sys_siglist' in one page (strsignal(3))

Through some accident, 'sys_siglist' has been documented in
two different pages. Consolidate the information to one page
(strsignal(3)) and add 'sys_siglist" to the NAME line of that
page.

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

uint_least8_t.3, uint_least16_t.3, uint_least32_t.3, uint_least64_t.3, uint_leastN_t.3: New links to system_data_types(7)

Signed-off-by: Alejandro Colomar <colomar.6.4.3@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

system_data_types.7: Add uint_leastN_t family of types

Signed-off-by: Alejandro Colomar <colomar.6.4.3@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

int_least8_t.3, int_least16_t.3, int_least32_t.3, int_least64_t.3, int_leastN_t.3: New links to system_data_types(7)

Signed-off-by: Alejandro Colomar <colomar.6.4.3@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

system_data_types.7: Add int_leastN_t family of types

Signed-off-by: Alejandro Colomar <colomar.6.4.3@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

uint_fast8_t.3, uint_fast16_t.3, uint_fast32_t.3, uint_fast64_t.3, uint_fastN_t.3: New links to system_data_types(7)

Signed-off-by: Alejandro Colomar <colomar.6.4.3@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

system_data_types.7: Add uint_fastN_t family of types

Signed-off-by: Alejandro Colomar <colomar.6.4.3@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

int_fast8_t.3, int_fast16_t.3, int_fast32_t.3, int_fast64_t.3, int_fastN_t.3: New links to system_data_types(7)

Signed-off-by: Alejandro Colomar <colomar.6.4.3@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

system_data_types.7: Add int_fastN_t family of types

Signed-off-by: Alejandro Colomar <colomar.6.4.3@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

system_data_types.7: Move "Bugs" after "Notes", as man-pages(7) specifies

Signed-off-by: Alejandro Colomar <colomar.6.4.3@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

uintptr_t.3: New link to system_data_types(7)

Signed-off-by: Alejandro Colomar <colomar.6.4.3@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

system_data_types.7: Add 'uintptr_t'

Signed-off-by: Alejandro Colomar <colomar.6.4.3@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

intptr_t.3: New link to system_data_types(7)

Signed-off-by: Alejandro Colomar <colomar.6.4.3@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

system_data_types.7: Add 'intptr_t'

Signed-off-by: Alejandro Colomar <colomar.6.4.3@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

system_data_types.7: srcfix

We used .br to force a simple line break (with no extra blank line)
after the tag.

Recently, we added .RS/.RS, and .RS comes just after the tag,
and I realized by accident that .RS already forces a simple line break.

Therefore, .br is completely redundant here, and can be removed.

This way we get rid of "raw" *roff requests in this page.

Signed-off-by: Alejandro Colomar <colomar.6.4.3@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

system_data_types.7: srcfix

Signed-off-by: Alejandro Colomar <colomar.6.4.3@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

system_data_types.7: srcfix

Signed-off-by: Alejandro Colomar <colomar.6.4.3@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

malloc_get_state.3: ffix

Signed-off-by: Alejandro Colomar <colomar.6.4.3@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

feature_test_macros.7: Update list of macros that inhibit default definitions

Signed-off-by: Jakub Wilk <jwilk@jwilk.net>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

system_data_types.7: Improve "Include" wording and format, and explain it in NOTES

The previous format/wording for the includes wasn't very clear.
Improve it a bit following Branden's proposal.
It also helps reduce lines of code.

Add a subsection in NOTES explaining the conventions used.

Remove the comment for helping maintain the page,
as the NOTES section is now clear enough.

Reported-by: G. Branden Robinson <g.branden.robinson@gmail.com>
Reported-by: Dave Martin <Dave.Martin@arm.com>
Reported-by: Michael Kerrisk <mtk.manpages@gmail.com>
Signed-off-by: Alejandro Colomar <colomar.6.4.3@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

openat2.2: tfix: fix minor reference typo

Signed-off-by: Aleksa Sarai <cyphar@cyphar.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

sched_getattr.2: Update to include changed size semantics

Due to a userspace breakage, commit 1251201c0d34 ("sched/core: Fix
uclamp ABI bug, clean up and robustify sched_read_attr() ABI logic
and code") changed the semantics of sched_getattr(2) when the
userspace struct is smaller than the kernel struct. Now, any
trailing non-zero data in the kernel structure is ignored when
copying to userspace. We also document the original error code
correctly (it was EFBIG not E2BIG) in the BUGS section.

Ref: 1251201c0d34 ("sched/core: Fix uclamp ABI bug, clean up and
                 robustify sched_read_attr() ABI logic and code")

Signed-off-by: Aleksa Sarai <cyphar@cyphar.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

man_show_fixme.sh: Fix misquoted double quotes in regexps

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

xdr.3: ffix

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

rpc.3: ffix

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

feature_test_macros.7: ffix

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

getutent.3: ffix

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

perf_event_open.2: srcfix

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

proc.5: ffix + srcfix

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

adjtimex.2, futex.2, semop.2, slabinfo.5, feature_test_macros.7, keyrings.7: srcfix

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

strftime.3: ffix

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

FILE.3: New link to system_data_types(7)

Signed-off-by: Alejandro Colomar <colomar.6.4.3@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

system_data_types.7: Add 'FILE'

Signed-off-by: Alejandro Colomar <colomar.6.4.3@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

_exit.2, access.2, acct.2, brk.2, chdir.2, chmod.2, chown.2, chroot.2, clock_getres.2, clock_nanosleep.2, fsync.2, futimesat.2, getdomainname.2, getgroups.2, gethostname.2, getpagesize.2, getrlimit.2, getsid.2, gettimeofday.2, kill.2, link.2, madvise.2, mincore.2, mkdir.2, mknod.2, nanosleep.2, nice.2, open.2, posix_fadvise.2, pread.2, process_vm_readv.2, readlink.2, readv.2, rename.2, select.2, semop.2, seteuid.2, setpgid.2, setreuid.2, sigaction.2, sigaltstack.2, sigpending.2, sigprocmask.2, sigsuspend.2, sigwaitinfo.2, stat.2, stime.2, symlink.2, sync.2, syscall.2, timer_create.2, timer_delete.2, timer_getoverrun.2, timer_settime.2, truncate.2, unlink.2, utimensat.2, vfork.2, vhangup.2, wait.2, wait4.2, a64l.3, abs.3, acos.3, acosh.3, addseverity.3, adjtime.3, asin.3, asinh.3, atan.3, atan2.3, atanh.3, atoi.3, bsd_signal.3, cbrt.3, ceil.3, cfree.3, clearenv.3, clock_getcpuclockid.3, confstr.3, copysign.3, cos.3, cosh.3, ctermid.3, ctime.3, daemon.3, dirfd.3, div.3, drand48.3, drand48_r.3, duplocale.3, dysize.3, ecvt.3, ecvt_r.3, endian.3, erf.3, erfc.3, exec.3, exp.3, exp2.3, expm1.3, fabs.3, fdim.3, ferror.3, fexecve.3, ffs.3, fgetgrent.3, fgetpwent.3, finite.3, flockfile.3, floor.3, fma.3, fmax.3, fmemopen.3, fmin.3, fmod.3, fopen.3, fpclassify.3, frexp.3, fseeko.3, ftw.3, futimes.3, fwide.3, gamma.3, gcvt.3, getaddrinfo.3, getcwd.3, getdate.3, getdirentries.3, getdtablesize.3, getentropy.3, getenv.3, getgrent.3, getgrent_r.3, getgrnam.3, getgrouplist.3, gethostbyname.3, gethostid.3, getline.3, getloadavg.3, getlogin.3, getmntent.3, getnameinfo.3, getnetent_r.3, getopt.3, getpass.3, getprotoent_r.3, getpwent.3, getpwent_r.3, getpwnam.3, getrpcent_r.3, getservent_r.3, getspnam.3, getsubopt.3, getusershell.3, getw.3, grantpt.3, group_member.3, gsignal.3, hypot.3, ilogb.3, inet.3, inet_net_pton.3, initgroups.3, insque.3, isalpha.3, isfdtype.3, isgreater.3, iswblank.3, j0.3, killpg.3, ldexp.3, lgamma.3, lockf.3, log.3, log10.3, log1p.3, log2.3, logb.3, lrint.3, lround.3, malloc.3, mbsnrtowcs.3, memchr.3, mkdtemp.3, mkfifo.3, mkstemp.3, mktemp.3, modf.3, mq_receive.3, mq_send.3, nan.3, newlocale.3, nextafter.3, nl_langinfo.3, on_exit.3, open_memstream.3, opendir.3, perror.3, popen.3, posix_fallocate.3, posix_madvise.3, posix_memalign.3, posix_openpt.3, pow.3, printf.3, profil.3, psignal.3, pthread_attr_setstack.3, pthread_cleanup_push_defer_np.3, pthread_kill.3, pthread_mutex_consistent.3, pthread_mutexattr_setrobust.3, pthread_rwlockattr_setkind_np.3, pthread_sigmask.3, pthread_sigqueue.3, pthread_spin_init.3, pthread_spin_lock.3, ptsname.3, putenv.3, putpwent.3, qecvt.3, qsort.3, rand.3, random.3, random_r.3, rcmd.3, readdir_r.3, realpath.3, remainder.3, remquo.3, rint.3, round.3, rpmatch.3, scalb.3, scalbln.3, scandir.3, scanf.3, sched_getcpu.3, seekdir.3, sem_wait.3, setbuf.3, setenv.3, setjmp.3, setnetgrent.3, siginterrupt.3, signbit.3, significand.3, sigqueue.3, sigset.3, sigsetops.3, sigvec.3, sigwait.3, sin.3, sinh.3, sockatmark.3, sqrt.3, stpcpy.3, stpncpy.3, strdup.3, strerror.3, strfromd.3, strnlen.3, strsep.3, strsignal.3, strtod.3, strtok.3, strtol.3, strtoul.3, syslog.3, tan.3, tanh.3, telldir.3, tempnam.3, termios.3, tgamma.3, timegm.3, timeradd.3, tmpnam.3, toascii.3, toupper.3, towlower.3, towupper.3, trunc.3, ttyslot.3, tzset.3, ualarm.3, unlocked_stdio.3, unlockpt.3, uselocale.3, usleep.3, wcpcpy.3, wcpncpy.3, wcscasecmp.3, wcsdup.3, wcsncasecmp.3, wcsnlen.3, wcsnrtombs.3, wordexp.3, wprintf.3, y0.3: srcfix: use better macros in SYNOPSIS

Around the text:
"Feature Test Macro Requirements for glibc..."
replace ".in -4n/.in" with ".RS -4/.RE".
The latter form is more idiomatic use of man macros.
The nroff output is unchanged.

Reported-by: G. Branden Robinson <g.branden.robinson@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

chmod.2, connect.2, recv.2: srcfix

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

clone.2, io_submit.2, select.2, shmget.2, getcontext.3, malloc_info.3, mtrace.3, posix_spawn.3, strfromd.3, proc.5: srcfix

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

system_data_types.7: Minor edits to Alejandro Colomar's patch

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

uint8_t.3, uint16_t.3, uint32_t.3, uint64_t.3, uintN_t.3: New links to system_data_types(7)

Signed-off-by: Alejandro Colomar <colomar.6.4.3@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

system_data_types.7: Add uintN_t family of types

Signed-off-by: Alejandro Colomar <colomar.6.4.3@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

int8_t.3, int16_t.3, int32_t.3, int64_t.3, intN_t.3: New links to system_data_types(7)

Signed-off-by: Alejandro Colomar <colomar.6.4.3@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

system_data_types.7: Add intN_t family of types

Signed-off-by: Alejandro Colomar <colomar.6.4.3@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

uintmax_t.3: New link to system_data_types(7)

Signed-off-by: Alejandro Colomar <colomar.6.4.3@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

system_data_types.7: Add 'uintmax_t'

Signed-off-by: Alejandro Colomar <colomar.6.4.3@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

intmax_t.3: New link to system_data_types(7)

Signed-off-by: Alejandro Colomar <colomar.6.4.3@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

system_data_types.7: Add 'intmax_t'

Signed-off-by: Alejandro Colomar <colomar.6.4.3@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

statx.2: Minor edits to Ira Weiny's

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

statx.2: Add STATX_ATTR_DAX

Linux 5.8 adds STATX_ATTR_DAX support.

https://lore.kernel.org/lkml/20200428002142.404144-4-ira.weiny@intel.com/
https://lore.kernel.org/lkml/20200504161352.GA13783@magnolia/

Add the text to the statx man page.

Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

ioctl_fslabel.2: ffix

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

system_data_types.7: ffix

Signed-off-by: Alejandro Colomar <colomar.6.4.3@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

va_list.3: New link to system_data_types(7)

Signed-off-by: Alejandro Colomar <colomar.6.4.3@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

system_data_types.7: Add va_list

Signed-off-by: Alejandro Colomar <colomar.6.4.3@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

seccomp.2: ffix

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

rtld-audit.7: srcfix: semantic newlines

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

rtld-audit.7: Clarify la_version handshake

Returning its argument without further checks is almost always
wrong for la_version.

Reviewed-by: Carlos O'Donell <carlos@redhat.com>
Signed-off-by: Florian Weimer <fweimer@redhat.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

system_data_types.7: Minor tweaks to Alejandro Colomar's float_t/double_t patches

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

system_data_types.7: srcfix

The contents of each type are a logical block that is indented as
a block.  They are not separate paragraphs that happen to be
indented separately, but a set of continuous paragraphs, all at
the same level, indented as a block from the list entry--the name
of the type--.  Therefore, it makes more sense to use block
indentation, represented by .RS/.RE, rather than indenting each
paragraph separately.  That way it's also easier to further indent
a separate paragraph inside a block, which happens for example in
the case of float_t & double_t.  It's simply much easier now to
use .IP specifically in those cases where you want to indent just
a single paragraph.

Also added an ending separator comment line just after the last
type.

[mtk: minor edits to commit message]

Signed-off-by: Alejandro Colomar <colomar.6.4.3@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

double_t.3: New link to system_data_types(7)

Signed-off-by: Alejandro Colomar <colomar.6.4.3@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

system_data_types.7: Add double_t

Signed-off-by: Alejandro Colomar <colomar.6.4.3@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

float_t.3: New link to system_data_types(7)

Signed-off-by: Alejandro Colomar <colomar.6.4.3@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

system_data_types.7: Add float_t

Signed-off-by: Alejandro Colomar <colomar.6.4.3@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

system_data_types.7: srcfix

Signed-off-by: Alejandro Colomar <colomar.6.4.3@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

seccomp.2: Use ARRAY_SIZE() macro instead of raw sizeof division

Signed-off-by: Alejandro Colomar <colomar.6.4.3@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

seccomp.2: Remove unneeded cast

From the email discussion:

> Hi Alex,
>
> On 9/25/20 9:31 AM, Alejandro Colomar wrote:
>> Signed-off-by: Alejandro Colomar <colomar.6.4.3@gmail.com>
>> ---
>>   man2/seccomp.2 | 2 +-
>>   1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/man2/seccomp.2 b/man2/seccomp.2
>> index 58033da1c..d6b856c32 100644
>> --- a/man2/seccomp.2
>> +++ b/man2/seccomp.2
>> @@ -1101,7 +1101,7 @@ install_filter(int syscall_nr, int t_arch, int f_errno)
>>       };
>>
>>       struct sock_fprog prog = {
>> -        .len = (unsigned short) (sizeof(filter) / sizeof(filter[0])),
>> +        .len = sizeof(filter) / sizeof(filter[0]),
>>           .filter = filter,
>>       };
>
> I have a small doubt about this change. With the change,
> there are no compilation warnings.
>
> But, if we change the code to something slightly different:
>
> [[
>      size_t x = (sizeof(filter) / sizeof(filter[0]));
>      struct sock_fprog prog = {
>          .len = x,
>          .filter = filter,
>      };
> ]]
>
> The "cc -Wconversion" gives us the following warning:
>
>      warning: conversion from ‘size_t’ {aka ‘long unsigned int’}
>      to ‘short unsigned int’ may change value
>
> Presumably we don't get a warning for an assignment of the form
>
>      .len = (sizeof(filter) / sizeof(filter[0]))
>
> because the compiler is smart enough to work out that the
> value of the constant expression is within the range of
> "unsigned short".
>
> Your thoughts?

Hi Michael,

I'd say that the cast doesn't fix any problems at all.  It silences a
valid warning, and I'd use a pragma for that (to be more explicit about
the intention of silencing a warning) if I do want -Wconversion enabled
(which usually I don't want, because it's too noisy) and I'm sure that
this won't overflow.  I'd limit the use casts to only when I *really*
need to.

I guess that if you enable -O3, the warning will vanish again because
the compiler will optimize away 'x' (but I didn't test).

Signed-off-by: Alejandro Colomar <colomar.6.4.3@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

lconv.3: New link to system_data_types(7)

Signed-off-by: Alejandro Colomar <colomar.6.4.3@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

system_data_types.7: Add lconv

Signed-off-by: Alejandro Colomar <colomar.6.4.3@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

getgrent_r.3: Declare variables with different types in different lines

Signed-off-by: Alejandro Colomar <colomar.6.4.3@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

system_data_types.7: ffix

Signed-off-by: Alejandro Colomar <colomar.6.4.3@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

lldiv_t.3: New link to system_data_types(7)

Signed-off-by: Alejandro Colomar <colomar.6.4.3@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

system_data_types.7: Add lldiv_t

Signed-off-by: Alejandro Colomar <colomar.6.4.3@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

ldiv_t.3: New link to system_data_types(7)

Signed-off-by: Alejandro Colomar <colomar.6.4.3@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

system_data_types.7: Add ldiv_t

Signed-off-by: Alejandro Colomar <colomar.6.4.3@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

div_t.3: New link to system_data_types(7)

Signed-off-by: Alejandro Colomar <colomar.6.4.3@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

system_data_types.7: Add div_t

Signed-off-by: Alejandro Colomar <colomar.6.4.3@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

imaxdiv_t.3: New link to system_data_types(7)

Signed-off-by: Alejandro Colomar <colomar.6.4.3@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

system_data_types.7: Add imaxdiv_t

Signed-off-by: Alejandro Colomar <colomar.6.4.3@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

strfromd.3: tfix

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

core.5: srcfix

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

core.5: ffix

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>