5582acd15e
Ready for 5.09
2020-11-01 21:08:55 +01:00
c9be570549
Changes: whitespace cleanups
2020-11-01 21:08:45 +01:00
548f91f86e
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
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Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2020-11-01 21:06:59 +01:00
ac46781f3d
Changes: Ready for 5.09
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Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2020-11-01 21:06:53 +01:00
152ce70f53
pthread_attr_init.3: tfix
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Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2020-11-01 21:06:53 +01:00
23a74bd771
openat.2: SYNOPSIS: return long
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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>
2020-11-01 19:04:11 +01:00
a024704790
mq_getsetattr.2: Use 'const' when appropriate
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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>
2020-11-01 18:23:38 +01:00
706d4f73ae
pthread_attr_init.3: SEE ALSO: add pthread_attr_init(3)
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Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2020-11-01 18:18:13 +01:00
96841f0e25
pthread_sigmask.3: SEE ALSO: add pthread_attr_setsigmask_np(3)
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Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2020-11-01 18:18:13 +01:00
340f4f9e7c
pthread_attr_setsigmask_np.3: New page for pthread_attr_setsigmask_np() + pthread_attr_getsigmask_np()
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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>
2020-11-01 18:18:13 +01:00
2e33563284
statx.2: ffix
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Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2020-11-01 07:17:20 +01:00
e9c09849cc
dlopen.3: ffix
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Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2020-10-31 10:17:00 +01:00
68219aba7f
futex.2: ffix
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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>
2020-10-30 21:05:10 +01:00
2253ecf016
futex.2: Use appropriate types
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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>
2020-10-30 20:16:08 +01:00
8a60718ef0
futex.2: srcfix
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Signed-off-by: Alejandro Colomar <colomar.6.4.3@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2020-10-30 20:15:59 +01:00
13e88b7070
getdents.2: Use appropriate types
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[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>
2020-10-29 20:10:56 +01:00
833ba57027
getdents.2: Minor tweak to Alex's patch
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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>
2020-10-28 22:17:53 +01:00
2adfdd7795
getdents.2: SYNOPSIS: Add missing header and feature test macro
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Signed-off-by: Alejandro Colomar <colomar.6.4.3@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2020-10-28 22:16:41 +01:00
d70361dab7
getdents.2: wfix
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Signed-off-by: Alejandro Colomar <colomar.6.4.3@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2020-10-28 22:14:02 +01:00
276dc9a3cc
clock_getres.2: EXAMPLES: Use 'const' when appropriate
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Signed-off-by: Alejandro Colomar <colomar.6.4.3@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2020-10-28 22:13:50 +01:00
93f369892a
strtol.3: EXAMPLES: Simplify errno checking
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(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>
2020-10-28 11:12:22 +01:00
b924e6b65a
strtol.3: EXAMPLES: As the default base, use special value 0
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Signed-off-by: Alejandro Colomar <colomar.6.4.3@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2020-10-28 11:11:25 +01:00
d01c330357
strtol.3: EXAMPLES: Delimit output string using ""
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Signed-off-by: Alejandro Colomar <colomar.6.4.3@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2020-10-28 11:11:12 +01:00
10414db19b
man_show_fixme.sh: Don't hyphenate or justify the manual page
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Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2020-10-28 09:42:41 +01:00
820e13fbd4
socket.7: srcfix: rewrap source lines
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Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2020-10-28 07:20:31 +01:00
e8500ecc78
socket.7: Document SO_INCOMING_NAPI_ID
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Signed-off-by: Sridhar Samudrala <sridhar.samudrala@intel.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2020-10-28 07:15:43 +01:00
f36f4f855b
strtol.3: ffix
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Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2020-10-28 07:01:01 +01:00
b6a968bca7
strtol.3: srcfix: Add myself to copyright
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I added the xample program in 2006, but omitted to add myself to the
copyright.
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2020-10-27 20:00:23 +01:00
30d41ce662
FIXME_list.sh: Fix broken regexp
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Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2020-10-27 19:42:47 +01:00
4111ac7675
perf_event_open.2: wfix
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Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2020-10-27 17:59:36 +01:00
0f66701491
perf_event_open.2: wfix
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Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2020-10-27 17:55:07 +01:00
d19b29a5bc
perf_event_open.2: Update the man page with CAP_PERFMON related information
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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>
2020-10-27 17:53:10 +01:00
900d564055
system_data_types.7: off_t: Add note about _FILE_OFFSET_BITS
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Signed-off-by: Alejandro Colomar <colomar.6.4.3@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2020-10-27 17:34:55 +01:00
8573214f58
lseek64.3: Since glibc 2.28. the 'llseek' symbol is no longer available
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Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2020-10-27 17:08:18 +01:00
20e43cd694
proc.5: Document inaccurate RSS due to SPLIT_RSS_COUNTING
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[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>
2020-10-27 14:52:08 +01:00
14948ad6ec
proc.5: Minor fixes
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Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2020-10-27 14:51:44 +01:00
bd13ace0c5
proc.5: ffix: use a hanging list as is done elsewhere in the page
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Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2020-10-27 14:51:44 +01:00
4492c4bf2c
system_data_types.7: ffix
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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>
2020-10-27 14:51:44 +01:00
476e632b65
system_data_types.7: ffix
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Signed-off-by: Alejandro Colomar <colomar.6.4.3@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2020-10-27 14:51:44 +01:00
2fbfb575b8
capabilities.7: Under CAP_SYS_ADMIN, group "sub-capabilities" together
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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>
2020-10-27 14:51:44 +01:00
045c5bde77
capabilities.7: CAP_SYS_ADMIN implies CAP_CHECKPOINT_RESTORE
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But the latter, weaker capability is preferred.
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2020-10-27 14:51:44 +01:00
a526aa4040
capabilities.7: tfix
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Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2020-10-27 14:51:44 +01:00
71f6247f3c
capabilities.7: Document the CAP_CHECKPOINT_RESTORE capability added in Linux 5.9
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Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2020-10-27 14:51:44 +01:00
167f94b707
proc.5: Update capability requirements for accessing /proc/[pid]/map_files
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The requirements changed with kernel commit 12886f8ab10ce6.
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2020-10-27 14:51:44 +01:00
1e516a820b
pid_namespaces.7: Update capability requirements for /proc/sys/kernel/ns_last_pid
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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>
2020-10-27 14:51:44 +01:00
1e4d6750e0
clone.2: CAP_CHECKPOINT_RESTORE can now be used to employ 'set_tid'
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Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2020-10-27 14:51:44 +01:00
874355e30b
capabilities.7: Add kernel doc reference for CAP_PERFMON
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Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2020-10-27 14:51:44 +01:00
f7cf9c0bf0
capabilities.7: ffix
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Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2020-10-27 14:51:44 +01:00
3af4e9733e
posix_fallocate.3: wfix
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Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2020-10-27 14:51:44 +01:00
d5ee3a149e
posix_fallocate.3: add EOPNOTSUPP error code.
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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>
2020-10-27 14:51:44 +01:00
Michael Kerrisk