semctl.2: ffix

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

sigaction.2: tfix

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

signal-safety.7: Note async-signal-safety details for errno

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

sigaction.2: Minor wording improvements

Restructure the sa_handler description as a list, for easier
reading.

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

sigaction.2: Clarify description of SA_NODEFER

Clarify description of SA_NODEFER, and note interaction with
act.sa_mask.

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

sigaction.2: ffix

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

sigaction.2: wfix

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

perf_event_open.2: srcfix

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

signal.7: Minor tweaks to new "Execution of signal handlers" subsection

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

io_setup.2: SYNOPSIS: return long

The Linux kernel uses a long as the return type for this syscall.
As glibc provides no wrapper, use the same types the kernel uses.

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

signal.7: Relocate the new "Execution of signal handlers" subsection

It is probably more sensible to place this section after
the subsection "Signal mask and pending signals".

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

perf_event_open.2: Assign calculated value explicitly to 'config'

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

signal.7: Minor tweaks to the test on execution of signal handlers

Reported-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

signal.7: Add some details on the execution of signal handlers

Add a "big picture" of what happens when a signal handler
is invoked.

Reported-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

sigaltstack.2: Clarify that the alternate signal stack is per-thread

Clarify that the alternate signal stack is per-thread (rather
than process-wide).

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

clone.2, sigaltstack.2: clone(CLONE_VM) disdables the alternate signal stack

In the kernel sources (kernel/fork.c::copy_process()), we have:

        /*
         * sigaltstack should be cleared when sharing the same VM
         */
        if ((clone_flags & (CLONE_VM|CLONE_VFORK)) == CLONE_VM)
                sas_ss_reset(p);

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

signal.7: SEE ALSO: add swapcontext(3)

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

sigaction.2: Further clarify the effect of the SA_NODEFER flag

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

getrlimit.2: State more precisely the range of kernel versions that had RLIMIT_LOCKS

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

timer_getoverrun.2: timer_getoverrun() now clamps the overrun count to DELAYTIMER_MAX

See https://bugzilla.kernel.org/show_bug.cgi?id=12665.
The fix by Thomas Gleixner was in kernel commit
78c9c4dfbf8c04883941445a195276bb4bb92c76.

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

signal.2: wfix: Make the warning against the use of signal() even more obvious

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

localedef.1: ffix

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

syscalls.2: Note that sysctl() was removed in Linux 5.5

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

bpf.2: Minor wording improvement

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

proc.5: wfix

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

syscalls.2: Add process_madvise()

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

mount.2, statfs.2: Minor tweaks to Ross Zwisler's patch

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

mount.2, statfs.2: Add NOSYMFOLLOW flags to mount(2) and statfs(2)

Signed-off-by: Ross Zwisler <zwisler@google.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

membarrier.2: Update for Linux 5.10

Linux kernel commit 2a36ab717e8fe678d98f81c14a0b124712719840
(part of 5.10 release) changed sys_membarrier prototype/parameters
and added two new commands [MEMBARRIER_CMD_PRIVATE_EXPEDITED_RSEQ
and MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED_RSEQ]. This
man-pages patch reflects these changes, by mostly copying comments
from the kernel patch into the man-page ([Peter Oskolkov] was also
the author of the kernel change).

[mtk: commit message tweaked]

Signed-off-by: Peter Oskolkov <posk@google.com>
Cowritten-by: Alejandro Colomar <colomar.6.4.3@gmail.com>
Signed-off-by: Alejandro Colomar <colomar.6.4.3@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

strerror.3: tfix

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

errno.3: Note another possible cause of the EMFILE error

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

mmap.2: Clarify SIGBUS text and treatment of partial page at end of a mapping

See https://unix.stackexchange.com/questions/616848/what-is-the-behaviour-of-a-file-backed-memory-map-when-reading-from-or-writing-t

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

io_cancel.2, io_destroy.2, io_getevents.2, io_setup.2, io_submit.2: SYNOPSIS: s/io_context_t/aio_context_t/

Linux uses aio_context_t for these syscalls,
and it's the type provided by <linux/aio_abi.h>.
Use it in the SYNOPSIS.

libaio uses 'io_context_t', but that difference is already noted
in NOTES.

[mtk: patch slightly tweaked]

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

feature_test_macros.7: tfix

Signed-off-by: John A. Leuenhagen <john@zlima12.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

Start of man-pages-5.10: updating Changes and Changes.old

Start of man-pages-5.10: updating .Announce and .lsm files

Start of man-pages-5.10: renaming .Announce and .lsm files

Ready for 5.09

Changes: whitespace cleanups

memusage.1, pldd.1, sprof.1, add_key.2, bind.2, bpf.2, clone.2, dup.2, epoll_ctl.2, eventfd.2, fanotify_init.2, fanotify_mark.2, futex.2, getdents.2, getpid.2, getrlimit.2, intro.2, ioctl_fat.2, ioctl_ns.2, kcmp.2, keyctl.2, membarrier.2, memfd_create.2, mprotect.2, msgctl.2, msgop.2, nfsservctl.2, open.2, open_by_handle_at.2, openat2.2, outb.2, perf_event_open.2, pivot_root.2, recv.2, recvmmsg.2, request_key.2, sched_setaffinity.2, sched_setattr.2, seccomp.2, select.2, send.2, signalfd.2, spu_run.2, sysctl.2, timer_create.2, userfaultfd.2, wait.2, CPU_SET.3, abs.3, argz_add.3, backtrace.3, bsearch.3, bswap.3, clock_getcpuclockid.3, cmsg.3, dl_iterate_phdr.3, dlinfo.3, dlopen.3, drand48.3, drand48_r.3, duplocale.3, encrypt.3, endian.3, envz_add.3, errno.3, ffs.3, fopencookie.3, get_phys_pages.3, getaddrinfo.3, getaddrinfo_a.3, getdate.3, getgrent_r.3, getgrouplist.3, getifaddrs.3, getline.3, getprotoent_r.3, getpwent_r.3, getpwnam.3, getservent_r.3, hsearch.3, insque.3, intro.3, lrint.3, lround.3, lseek64.3, mallinfo.3, malloc_hook.3, malloc_info.3, mbsinit.3, mbstowcs.3, mtrace.3, newlocale.3, ntp_gettime.3, offsetof.3, perror.3, posix_fallocate.3, posix_spawn.3, printf.3, psignal.3, pthread_attr_init.3, pthread_create.3, pthread_getattr_np.3, pthread_getcpuclockid.3, pthread_setaffinity_np.3, pthread_setname_np.3, pthread_sigmask.3, qsort.3, rand.3, random.3, rpc.3, rtnetlink.3, scalbln.3, shm_open.3, stdarg.3, strcat.3, strerror.3, strfmon.3, strptime.3, strsignal.3, strtod.3, strtok.3, strtol.3, strtoul.3, tsearch.3, wordexp.3, loop.4, vcs.4, veth.4, core.5, locale.5, slabinfo.5, cgroup_namespaces.7, cpuset.7, credentials.7, fanotify.7, feature_test_macros.7, inotify.7, ip.7, kernel_lockdown.7, man.7, mount_namespaces.7, namespaces.7, pid_namespaces.7, rtld-audit.7, sigevent.7, sock_diag.7, standards.7, unix.7, user_namespaces.7: tstamp

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

Changes: tfix

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

Changes: Ready for 5.09

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

bpf-helpers.7: tfix

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

pthread_attr_init.3: tfix

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

openat.2: SYNOPSIS: return long

The Linux kernel uses long as the return type for this syscall.
As glibc provides no wrapper, use the same type the kernel uses.

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

mq_getsetattr.2: Use 'const' when appropriate

The Linux kernel uses the following:

ipc/mqueue.c:1480:
SYSCALL_DEFINE3(mq_getsetattr, mqd_t, mqdes,
const struct mq_attr __user *, u_mqstat,
struct mq_attr __user *, u_omqstat)

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

pthread_attr_init.3: SEE ALSO: add pthread_attr_init(3)

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

pthread_sigmask.3: SEE ALSO: add pthread_attr_setsigmask_np(3)

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

pthread_attr_setsigmask_np.3: New page for pthread_attr_setsigmask_np() + pthread_attr_getsigmask_np()

Add a page documenting the pthread_attr_setsigmask_np(3) and
pthread_attr_getsigmask_np() functions added in glibc 2.32.

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

statx.2: ffix

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

dlopen.3: ffix

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

futex.2: ffix

That comment wrapped on an 80-column terminal.
Divide it into two lines.

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

futex.2: Use appropriate types

The Linux kernel uses the following:

kernel/futex.c:3778:
SYSCALL_DEFINE6(futex, u32 __user *, uaddr, int, op, u32, val,
struct __kernel_timespec __user *, utime, u32 __user *, uaddr2,
u32, val3)

Since there is no glibc wrapper, use the same types the kernel uses.

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

futex.2: srcfix

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

getdents.2: Use appropriate types

[mtk: Applied patch manually]

getdents():
This function has no glibc wrapper.
As such, we should use the same types the Linux kernel uses:
Use 'long' as the return type.

getdents64():
The glibc wrapper uses:
ssize_t getdents64(int, void *, size_t);

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

getdents.2: Minor tweak to Alex's patch

The text in NOTES doesn't really relate specifically to
the #include, so remove the comment on the #include.

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

getdents.2: SYNOPSIS: Add missing header and feature test macro

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

getdents.2: wfix

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

clock_getres.2: EXAMPLES: Use 'const' when appropriate

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

strtol.3: EXAMPLES: Simplify errno checking

(No expected change in behavior,)

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

strtol.3: EXAMPLES: As the default base, use special value 0

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

strtol.3: EXAMPLES: Delimit output string using ""

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

man_show_fixme.sh: Don't hyphenate or justify the manual page

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

socket.7: srcfix: rewrap source lines

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

socket.7: Document SO_INCOMING_NAPI_ID

Signed-off-by: Sridhar Samudrala <sridhar.samudrala@intel.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

strtol.3: ffix

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

strtol.3: srcfix: Add myself to copyright

I added the xample program in 2006, but omitted to add myself to the
copyright.

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

FIXME_list.sh: Fix broken regexp

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

perf_event_open.2: wfix

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

perf_event_open.2: wfix

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

perf_event_open.2: Update the man page with CAP_PERFMON related information

Extend this page with the information about CAP_PERFMON capability
designed to secure performance monitoring and observability
operation in a system according to the principle of least
privilege [1] (POSIX IEEE 1003.1e, 2.2.2.39).

[1] https://sites.google.com/site/fullycapable/, posix_1003.1e-990310.pdf

Signed-off-by: Alexey Budankov <alexey.budankov@linux.intel.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

system_data_types.7: off_t: Add note about _FILE_OFFSET_BITS

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

lseek64.3: Since glibc 2.28. the 'llseek' symbol is no longer available

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

proc.5: Document inaccurate RSS due to SPLIT_RSS_COUNTING

[mtk: Manually applied patch, because of conflicts with other
merged changes; also added an edit suggested by Jann; see the
thread at
https://lore.kernel.org/linux-man/20201012114940.1317510-1-jannh@google.com/]

Since 34e55232e59f7b19050267a05ff1226e5cd122a5 (introduced back in
v2.6.34), Linux uses per-thread RSS counters to reduce cache
contention on the per-mm counters. With a 4K page size, that means
that you can end up with the counters off by up to 252KiB per
thread.

Example:

$ cat rsstest.c
#include <stdlib.h>
#include <err.h>
#include <stdio.h>
#include <signal.h>
#include <unistd.h>
#include <sys/mman.h>
#include <sys/eventfd.h>
#include <sys/prctl.h>
void dump(int pid) {
  char cmd[1000];
  sprintf(cmd,
    "grep '^VmRSS' /proc/%d/status;"
    "grep '^Rss:' /proc/%d/smaps_rollup;"
    "echo",
    pid, pid
  );
  system(cmd);
}
int main(void) {
  eventfd_t dummy;
  int child_wait = eventfd(0, EFD_SEMAPHORE|EFD_CLOEXEC);
  int child_resume = eventfd(0, EFD_SEMAPHORE|EFD_CLOEXEC);
  if (child_wait == -1 || child_resume == -1) err(1, "eventfd");
  pid_t child = fork();
  if (child == -1) err(1, "fork");
  if (child == 0) {
    if (prctl(PR_SET_PDEATHSIG, SIGKILL)) err(1, "PDEATHSIG");
    if (getppid() == 1) exit(0);
    char *mapping = mmap(NULL, 80 * 0x1000, PROT_READ|PROT_WRITE,
                         MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
    eventfd_write(child_wait, 1);
    eventfd_read(child_resume, &dummy);
    for (int i=0; i<40; i++) mapping[0x1000 * i] = 1;
    eventfd_write(child_wait, 1);
    eventfd_read(child_resume, &dummy);
    for (int i=40; i<80; i++) mapping[0x1000 * i] = 1;
    eventfd_write(child_wait, 1);
    eventfd_read(child_resume, &dummy);
    exit(0);
  }

  eventfd_read(child_wait, &dummy);
  dump(child);
  eventfd_write(child_resume, 1);

  eventfd_read(child_wait, &dummy);
  dump(child);
  eventfd_write(child_resume, 1);

  eventfd_read(child_wait, &dummy);
  dump(child);
  eventfd_write(child_resume, 1);

  exit(0);
}
$ gcc -o rsstest rsstest.c && ./rsstest
VmRSS:       68 kB
Rss:                 616 kB

VmRSS:       68 kB
Rss:                 776 kB

VmRSS:      812 kB
Rss:                 936 kB

$

Let's document that those counters aren't entirely accurate.

Reported-by: Mark Mossberg <mark.mossberg@gmail.com>
Signed-off-by: Jann Horn <jannh@google.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

proc.5: Minor fixes

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

proc.5: ffix: use a hanging list as is done elsewhere in the page

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

system_data_types.7: ffix

Format section names inside each type.
Follow the same pattern as in stat.2 (see line 158: ".IR Note :")

Before this ffix, it was visually harder to find sections inside a type.

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>

capabilities.7: Under CAP_SYS_ADMIN, group "sub-capabilities" together

CAP_BPF, CAP_PERFMON, and CAP_CHECKPOINT_RESTORE have all been
added to split out the power of CAP_SYS_ADMIN into weaker pieces.
Group all of these capabilities together in the list under
CAP_SYS_ADMIN, to make it clear that there is a pattern to these
capabilities.

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

capabilities.7: CAP_SYS_ADMIN implies CAP_CHECKPOINT_RESTORE

But the latter, weaker capability is preferred.

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

capabilities.7: tfix

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

capabilities.7: Document the CAP_CHECKPOINT_RESTORE capability added in Linux 5.9

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

proc.5: Update capability requirements for accessing /proc/[pid]/map_files

The requirements changed with kernel commit 12886f8ab10ce6.

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

pid_namespaces.7: Update capability requirements for /proc/sys/kernel/ns_last_pid

Since Linux 5.9, CONFIG_CHECKPOINT_RESTORE also allows writing to
/proc/sys/kernel/ns_last_pid.

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

clone.2: CAP_CHECKPOINT_RESTORE can now be used to employ 'set_tid'

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

capabilities.7: Add kernel doc reference for CAP_PERFMON

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

capabilities.7: ffix

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

posix_fallocate.3: wfix

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

posix_fallocate.3: add EOPNOTSUPP error code.

As can be seen in

https://git.musl-libc.org/cgit/musl/tree/src/fcntl/posix_fallocate.c?id=73cc775bee53300c7cf759f37580220b18ac13d3

musl libc returns the syscall's errors directly, which means it
doesn't perform the same emulation as glibc, and can return
EOPNOTSUPP to an application, which isn't listed in ERRORS.

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

system_data_types.7: Promote makedev(3) in discussion of 'dev_t'

makedev(3) provides much more detail on this type, so mention it
in the description rather than in 'See also'.

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

system_data_types.7: Under 'dev_t' mention stat(2) rather than ustat(2) in "See also"

stat(2) is the most interesting API here; ustat(2) is obscure.

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

dev_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 'dev_t'

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

argz_add.3, envz_add.3: Point out that 'error_t' is an integer type

Reported-by: Jonny Grant <jg@jguk.org>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

argz_add.3: tfix

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

argz_add.3, envz_add.3: Remove sentence that conveys no useful info

The sentence "Handle with care" in CONFORMING TO conveys no useful
information. Remove it.

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

argz_add.3: ffix

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

stailq.3: SEE ALSO: Add insque(3), queue(7)

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

clockid_t: 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 'clockid_t'

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