324f6154f4
Removed trailing white space at end of lines
2019-11-19 15:31:20 +01:00
a5409de92c
clone.2, fallocate.2, ioctl_iflags.2, ioctl_list.2, pidfd_open.2, pivot_root.2, quotactl.2, seccomp.2, select.2, wait.2, proc.5, cgroups.7, netdevice.7, uts_namespaces.7: tstamp
...
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2019-11-19 15:31:20 +01:00
be66dbc7a7
clone.2: Use pid_t for clone3() {child,parent}_tid
...
Advertise to userspace that they should use proper pid_t types
for arguments returning a pid.
The kernel-internal struct kernel_clone_args currently uses int
as type and since POSIX mandates that pid_t is a signed integer
type and glibc and friends use int this is not an issue. After
the merge window for v5.5 closes we can switch struct
kernel_clone_args over to using pid_t as well without any danger
in regressing current userspace.
Also note, that the new set tid feature which will be merged for
v5.5 uses pid_t types as well.
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2019-11-17 18:58:24 +01:00
8eea66b8bb
clone.2: Check for MAP_FAILED not NULL on mmap()
...
If mmap() fails it will return MAP_FAILED which according to the manpage
is (void *)-1 not NULL.
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2019-11-17 18:56:07 +01:00
225f5da8ac
clone.2: tfix
...
Fix two spelling mistakes in manpage describing the clone{2,3}()
syscalls/syscall wrappers.
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2019-11-17 18:55:46 +01:00
99c3a00027
clone.2: Allocate child's stack using mmap(2) rather than malloc(3)
...
Christian Brauner suggested mmap(MAP_STACKED), rather than
malloc(), as the canonical way of allocating a stack for the
child of clone(), and Jann Horn noted some reasons why:
Not on Linux, but on OpenBSD, they do use MAP_STACK now
AFAIK; this was announced here:
<http://openbsd-archive.7691.n7.nabble.com/stack-register-checking-td338238.html >.
Basically they periodically check whether the userspace
stack pointer points into a MAP_STACK region, and if not,
they kill the process. So even if it's a no-op on Linux, it
might make sense to advise people to use the flag to improve
portability? I'm not sure if that's something that belongs
in Linux manpages.
Another reason against malloc() is that when setting up
thread stacks in proper, reliable software, you'll probably
want to place a guard page (in other words, a 4K PROT_NONE
VMA) at the bottom of the stack to reliably catch stack
overflows; and you probably don't want to do that with
malloc, in particular with non-page-aligned allocations.
And the OpenBSD 6.5 manual pages says:
MAP_STACK
Indicate that the mapping is used as a stack. This
flag must be used in combination with MAP_ANON and
MAP_PRIVATE.
And I then noticed that MAP_STACK seems already to be on
FreeBSD for a long time:
MAP_STACK
Map the area as a stack. MAP_ANON is implied.
Offset should be 0, fd must be -1, and prot should
include at least PROT_READ and PROT_WRITE. This
option creates a memory region that grows to at
most len bytes in size, starting from the stack
top and growing down. The stack top is the start‐
ing address returned by the call, plus len bytes.
The bottom of the stack at maximum growth is the
starting address returned by the call.
The entire area is reserved from the point of view
of other mmap() calls, even if not faulted in yet.
Reported-by: Jann Horn <jannh@google.com>
Reported-by: Christian Brauner <christian.brauner@ubuntu.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2019-11-14 12:19:21 +01:00
8dd6b0bcd2
clone.2: Minor tweaks after feedback from Christian Brauner
...
Reported-by: Christian Brauner <christian.brauner@ubuntu.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2019-11-10 20:39:17 +01:00
edf93e146d
clone.2: tfix
...
Remove duplicated word.
Signed-off-by: Jakub Wilk <jwilk@jwilk.net>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2019-11-09 12:54:41 +01:00
baa435c66c
clone.2: Tidy up the description of CLONE_DETACHED
...
The obsolete CLONE_DETACHED flag has never been properly
documented, but now the discussion CLONE_PIDFD also requires
mention of CLONE_DETACHED. So, properly document CLONE_DETACHED,
and mention its interactions with CLONE_PIDFD.
Reported-by: Christian Brauner <christian.brauner@ubuntu.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2019-11-09 09:09:18 +01:00
f6183e5b21
clone.2: tfix
...
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2019-11-09 09:09:18 +01:00
981eda4aa5
clone.2: Consistently order paragraphs for CLONE_NEW* flags
...
Sometimes the descriptions of these flags mentioned the
corresponding section 7 namespace manual page and then the
required capabilities, and sometimes the order was the was
the reverse. Make it consistent.
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2019-11-09 09:09:18 +01:00
d2799a466c
clone.2: Remove various details that are already covered in namespaces pages
...
Remove details of UTS, IPC, and network namespaces that are
already covered in the corresponding namespaces pages in
section 7. This change is for consistency, since corresponding
details were not provided for other namespace types in clone(2)
and these details do not appear in unshare(2).
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2019-11-09 09:09:18 +01:00
1270276bc3
clone.2: Remove wording that suggests CLONE_NEW* flags are for containers
...
These flags are used for implementing many other interesting
things by now.
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2019-11-09 09:09:18 +01:00
f5d5180f5c
clone.2: Adjustments to clone3() text as well as some other details in the page
...
After feedback from Christian Brauner [1], I've adjusted a few pieces
of the clone3() text, and also adjusted some of the older text in
the page.
[1] https://lore.kernel.org/linux-man/20191107151941.dw4gtul5lrtax4se@wittgenstein/
Reported-by: Christian Brauner <christian.brauner@ubuntu.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2019-11-09 09:09:02 +01:00
1033756742
clone.2: Give the introductory paragraph a new coat of paint
...
Change the text in the introductory paragraph (which was written
20 years ago) to reflect the fact that clone*() does more things
nowadays.
Cowritten-by: Christian Brauner <christian.brauner@ubuntu.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2019-11-08 16:32:38 +01:00
75e28ebad4
clone.2: ffix
...
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2019-10-31 14:22:13 +01:00
400027959e
clone.2, proc.5: Adjust references to namespaces(7)
...
Adjust references to namespaces(7) to be references to pages
describing specific namespace types.
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2019-10-31 11:34:08 +01:00
a9e52b437f
clone.2: Include clone3 in NAME section.
...
Signed-off-by: Jakub Wilk <jwilk@jwilk.net>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2019-10-31 06:22:15 +01:00
16853a31ee
clone.2: Introduce "flags mask" as a generic term for clone()/clone3()
...
Use "flags mask" as a generic term to refer to the clone()
'flags' argument and the clone3() 'cl_args.flags' field.
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2019-10-25 21:51:04 +02:00
5261b0fe75
clone.2: Minor improvements following clone3() additions
...
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2019-10-25 21:20:38 +02:00
fb1fa92b0a
clone.2: srcfix: update copyright
...
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2019-10-25 20:25:53 +02:00
faa0e55ae9
clone.2: Document clone3()
...
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2019-10-25 15:39:04 +02:00
e2bf12346d
clone.2: wfix
...
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2019-10-24 15:34:14 +02:00
b7cf324fd8
clone.2: Minor change: move a paragraph from DESCRIPTION to NOTES
...
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2019-10-24 09:26:26 +02:00
5fbce8f22b
clone.2: Add some subsection headings
...
Again, in preparation for adding clone3() documentation.
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2019-10-24 09:25:14 +02:00
81c2368f46
clone.2: Rename arguments for consistency with clone3()
...
Sometime soon, we'll have to add documentation of clone3() to this
page. As a preparatorys step, make the names of the clone()
arguments the same as the fields in the clone3() 'args' struct:
ctid ==> child_pid
ptid ==> parent_tid
newtls ==> tld
child_stack ==> stack
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2019-10-24 09:13:44 +02:00
d883766832
clone.2: SEE ALSO: add pidfd_open(2)
...
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2019-10-10 12:24:28 +02:00
34a975f8ae
clone.2: Refer to pidfd_open(2) for the purpose of PID file descriptors
...
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2019-10-10 12:24:28 +02:00
b97cc7ae40
clone.2: Minor wording improvements
...
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2019-10-10 12:24:28 +02:00
7d7dc1877f
clone.2: Remove a CLONE_PIDFD detail that wasn't true in the final implementation
...
Reviewed-by: Christian Brauner <christian.brauner@ubuntu.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2019-10-10 12:24:28 +02:00
b4ebffb230
clone.2: The close-on-exec flag is set on the new FD returned by CLONE_PIDFD
...
In the kernel source (kernel/fork.c::copy_process()), there is:
pidfile = anon_inode_getfile("[pidfd]", &pidfd_fops, pid,
O_RDWR | O_CLOEXEC);
Reviewed-by: Christian Brauner <christian.brauner@ubuntu.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2019-10-10 12:24:28 +02:00
0eec009fb3
clone.2: ffix (split a paragraph)
...
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2019-10-10 12:24:28 +02:00
4e98b07476
clone.2: Minor tweaks to Christian Brauner's patch
...
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2019-10-10 12:24:28 +02:00
99f6c1d734
clone.2: srcfix: wrap source at sentence boundaries
...
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2019-10-10 12:24:28 +02:00
9f93898154
clone.2: Document CLONE_PIDFD
...
Add an entry for CLONE_PIDFD. This flag is available starting
with kernel 5.2. If specified, a process file descriptor
("pidfd") referring to the child process will be returned in
the ptid argument.
Signed-off-by: Christian Brauner <christian@brauner.io>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2019-10-10 12:24:28 +02:00
ed4f87f0c8
clone.2: tfix
...
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2019-08-26 21:54:16 +02:00
63121bd499
pldd.1, bpf.2, chdir.2, clone.2, fanotify_init.2, fanotify_mark.2, intro.2, ipc.2, mount.2, mprotect.2, msgctl.2, msgget.2, msgop.2, pivot_root.2, pkey_alloc.2, poll.2, prctl.2, semctl.2, semget.2, semop.2, setxattr.2, shmctl.2, shmget.2, shmop.2, tkill.2, dlopen.3, exec.3, ftok.3, getutent.3, on_exit.3, strcat.3, cpuid.4, proc.5, capabilities.7, cgroup_namespaces.7, credentials.7, fanotify.7, mount_namespaces.7, namespaces.7, sched.7, signal.7, socket.7, unix.7, user_namespaces.7, vdso.7, xattr.7, ld.so.8: tstamp
...
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2019-08-02 08:34:32 +02:00
343cdc5ac9
clone.2, intro.2, ipc.2, msgctl.2, msgget.2, msgop.2, semctl.2, semget.2, semop.2, shmctl.2, shmget.2, shmop.2, ftok.3, proc.5, namespaces.7: Change reference to svipc(7) to sysvipc(7)
...
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2019-06-25 06:38:01 +02:00
6ab62ed869
clone.2: CLONE_CHILD_SETTID has effect before clone() returns *in the child*
...
CLONE_CHILD_SETTID may not have had effect by the time clone()
returns in the parent, which could bre relevant if the
CLONE_VM flag is employed. The relevant kernel code is in
schedule_tail(), which is called in ret_from_fork()
in the child.
See https://bugzilla.kernel.org/show_bug.cgi?id=203105
Demonstration using the program shown below (inspired by a simpler
example from Jakub):
$ ./a.out
parent start: ctid = 0 ptid = 6212
child start: ctid = 6212 ptid = 6212
child later: ctid = 6212 ptid = 6212
cat parent later: ctid = 6212 ptid = 6212
f.child -- bye
$ cat prog.c
static volatile pid_t ctid, ptid;
static int
child_fn(void *arg)
{
printf("child start: ctid = %5d ptid = %5d\n", ctid, ptid);
sleep(1);
printf("child later: ctid = %5d ptid = %5d\n", ctid, ptid);
sleep(2);
printf("child -- bye\n");
return 0;
}
int
main(void)
{
void *stack = malloc(0x1000);
char *stack_top = (char *) stack + 0x1000;
int flags = SIGCHLD | CLONE_VM |
// CLONE_VFORK |
CLONE_PARENT_SETTID | CLONE_CHILD_SETTID;
if (clone(child_fn, stack_top, flags, NULL, &ptid, NULL, &ctid) == -1) {
perror("clone");
exit(EXIT_SUCCESS);
}
fprintf(stderr, "parent start: ctid = %5d ptid = %5d\n", ctid, ptid);
sleep(2);
fprintf(stderr, "parent later: ctid = %5d ptid = %5d\n", ctid, ptid);
if (wait(NULL) == -1) {
perror("wait");
exit(EXIT_FAILURE);
}
exit(EXIT_SUCCESS);
}
Reported-by: Jakub Nowak <jakub.jakub.nowak@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2019-04-15 14:17:39 +02:00
9ba0180298
getent.1, iconv.1, ldd.1, locale.1, localedef.1, memusage.1, memusagestat.1, pldd.1, sprof.1, time.1, _syscall.2, accept.2, add_key.2, adjtimex.2, bind.2, bpf.2, capget.2, chown.2, chroot.2, clock_getres.2, clone.2, connect.2, copy_file_range.2, epoll_ctl.2, epoll_wait.2, eventfd.2, fanotify_init.2, fanotify_mark.2, fcntl.2, fsync.2, futex.2, getcpu.2, getdents.2, getgid.2, getgroups.2, getpid.2, gettid.2, gettimeofday.2, getuid.2, getxattr.2, inotify_add_watch.2, inotify_init.2, ioctl_fat.2, ioctl_ns.2, ioctl_userfaultfd.2, ioprio_set.2, kcmp.2, kexec_load.2, keyctl.2, listxattr.2, lseek.2, madvise.2, memfd_create.2, migrate_pages.2, mount.2, mprotect.2, mremap.2, msgctl.2, msgop.2, nfsservctl.2, open_by_handle_at.2, perf_event_open.2, pipe.2, pivot_root.2, pkey_alloc.2, poll.2, posix_fadvise.2, prctl.2, readahead.2, readdir.2, readlink.2, reboot.2, recvmmsg.2, removexattr.2, rename.2, request_key.2, s390_guarded_storage.2, s390_runtime_instr.2, s390_sthyi.2, sched_setaffinity.2, sched_setattr.2, sched_setparam.2, seccomp.2, select.2, select_tut.2, semctl.2, sendmmsg.2, set_thread_area.2, setgid.2, setns.2, setuid.2, setxattr.2, shmctl.2, sigaction.2, signalfd.2, sigsuspend.2, socket.2, socketpair.2, spu_run.2, stat.2, statx.2, subpage_prot.2, syscalls.2, sysctl.2, tee.2, timer_create.2, timerfd_create.2, truncate.2, uname.2, unshare.2, userfaultfd.2, ustat.2, vmsplice.2, write.2, CPU_SET.3, __ppc_get_timebase.3, alloca.3, argz_add.3, asprintf.3, backtrace.3, basename.3, bsd_signal.3, bstring.3, bswap.3, bzero.3, cacos.3, cacosh.3, catan.3, catanh.3, catgets.3, clock_getcpuclockid.3, cmsg.3, confstr.3, ctermid.3, ctime.3, des_crypt.3, dl_iterate_phdr.3, dlinfo.3, dlsym.3, duplocale.3, end.3, endian.3, errno.3, exec.3, exit.3, ferror.3, fgetws.3, fmemopen.3, fnmatch.3, fopencookie.3, fputws.3, frexp.3, ftw.3, get_nprocs_conf.3, get_phys_pages.3, getaddrinfo.3, getaddrinfo_a.3, getdate.3, getgrouplist.3, getifaddrs.3, getline.3, getlogin.3, getmntent.3, getnameinfo.3, getopt.3, getpass.3, getprotoent_r.3, getpwnam.3, getservent_r.3, getsubopt.3, glob.3, gnu_get_libc_version.3, hsearch.3, if_nameindex.3, index.3, inet.3, inet_net_pton.3, inet_pton.3, insque.3, isatty.3, iswblank.3, iswspace.3, lockf.3, makecontext.3, mallinfo.3, malloc.3, malloc_hook.3, malloc_info.3, mallopt.3, matherr.3, mbrtowc.3, mbsnrtowcs.3, mbsrtowcs.3, mbstowcs.3, mbtowc.3, mcheck.3, memchr.3, mq_getattr.3, mq_notify.3, newlocale.3, nl_langinfo.3, offsetof.3, perror.3, posix_spawn.3, printf.3, pthread_attr_init.3, pthread_cancel.3, pthread_cleanup_push.3, pthread_getattr_default_np.3, pthread_getattr_np.3, pthread_getcpuclockid.3, pthread_mutexattr_setrobust.3, pthread_rwlockattr_setkind_np.3, pthread_setaffinity_np.3, pthread_setname_np.3, pthread_setschedparam.3, pthread_sigmask.3, putenv.3, qsort.3, rand.3, random.3, readdir.3, regex.3, resolver.3, rpmatch.3, rtime.3, scanf.3, sem_wait.3, setaliasent.3, setbuf.3, stpcpy.3, stpncpy.3, strcat.3, strchr.3, strcmp.3, strcpy.3, strdup.3, strerror.3, strfromd.3, strfry.3, strftime.3, string.3, strlen.3, strnlen.3, strsep.3, strstr.3, strtok.3, strtol.3, strtoul.3, strverscmp.3, strxfrm.3, system.3, termios.3, trunc.3, wcpcpy.3, wcpncpy.3, wcrtomb.3, wcscat.3, wcscpy.3, wcslen.3, wcsncat.3, wcsncmp.3, wcsncpy.3, wcsnlen.3, wcsnrtombs.3, wcsrtombs.3, wcsstr.3, wcstok.3, wcstombs.3, wcwidth.3, wprintf.3, xcrypt.3, console_codes.4, dsp56k.4, full.4, initrd.4, lirc.4, loop.4, st.4, tty.4, vcs.4, charmap.5, core.5, host.conf.5, locale.5, proc.5, repertoiremap.5, resolv.conf.5, termcap.5, tmpfs.5, tzfile.5, aio.7, capabilities.7, cgroup_namespaces.7, cgroups.7, charsets.7, complex.7, epoll.7, fanotify.7, feature_test_macros.7, inotify.7, ip.7, locale.7, man-pages.7, man.7, namespaces.7, pid_namespaces.7, pkeys.7, pthreads.7, rtld-audit.7, sched.7, signal.7, sock_diag.7, socket.7, tcp.7, udp.7, unicode.7, user_namespaces.7, utf-8.7, zdump.8, zic.8: tstamp
...
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2019-03-06 15:12:10 +01:00
d1a719857b
locale.1, memusage.1, pldd.1, _syscall.2, add_key.2, bind.2, bpf.2, chown.2, clone.2, copy_file_range.2, eventfd.2, execve.2, futex.2, getdents.2, getrlimit.2, ioctl_fat.2, ioctl_ns.2, kcmp.2, kexec_load.2, keyctl.2, listxattr.2, lseek.2, membarrier.2, memfd_create.2, mmap.2, mprotect.2, msgop.2, open_by_handle_at.2, perf_event_open.2, pipe.2, readdir.2, readlink.2, readv.2, recvmmsg.2, request_key.2, sched_setaffinity.2, seccomp.2, select.2, select_tut.2, sendmmsg.2, setns.2, signalfd.2, spu_run.2, stat.2, sysctl.2, tee.2, timer_create.2, timerfd_create.2, truncate.2, uname.2, unshare.2, userfaultfd.2, ustat.2, wait.2, CPU_SET.3, __ppc_get_timebase.3, argz_add.3, asprintf.3, backtrace.3, basename.3, bswap.3, bzero.3, cacos.3, cacosh.3, catan.3, catanh.3, catgets.3, clock_getcpuclockid.3, confstr.3, ctime.3, dl_iterate_phdr.3, dlinfo.3, duplocale.3, encrypt.3, end.3, endian.3, fgetws.3, fmemopen.3, fopencookie.3, fputws.3, frexp.3, ftw.3, get_nprocs_conf.3, get_phys_pages.3, getaddrinfo.3, getaddrinfo_a.3, getdate.3, getgrouplist.3, getifaddrs.3, getline.3, getlogin.3, getopt.3, getpass.3, getprotoent_r.3, getpwnam.3, getservent_r.3, getsubopt.3, glob.3, gnu_get_libc_version.3, hsearch.3, if_nameindex.3, index.3, inet.3, inet_net_pton.3, inet_pton.3, insque.3, iswblank.3, iswspace.3, makecontext.3, mallinfo.3, malloc_hook.3, malloc_info.3, mallopt.3, matherr.3, mbrtowc.3, mbsnrtowcs.3, mbsrtowcs.3, mbstowcs.3, mbtowc.3, mcheck.3, memchr.3, mq_getattr.3, mq_notify.3, newlocale.3, nl_langinfo.3, offsetof.3, perror.3, posix_spawn.3, printf.3, pthread_attr_init.3, pthread_cancel.3, pthread_cleanup_push.3, pthread_create.3, pthread_getattr_default_np.3, pthread_getattr_np.3, pthread_getcpuclockid.3, pthread_mutexattr_setrobust.3, pthread_setaffinity_np.3, pthread_setname_np.3, pthread_setschedparam.3, pthread_sigmask.3, qsort.3, rand.3, readdir.3, regex.3, rpmatch.3, rtime.3, scanf.3, sem_wait.3, setaliasent.3, setbuf.3, stpcpy.3, stpncpy.3, strcat.3, strchr.3, strcpy.3, strdup.3, strerror.3, strfromd.3, strftime.3, strlen.3, strnlen.3, strsep.3, strstr.3, strtok.3, strtol.3, strtoul.3, strverscmp.3, strxfrm.3, termios.3, tsearch.3, wcpcpy.3, wcpncpy.3, wcrtomb.3, wcscat.3, wcscpy.3, wcslen.3, wcsncat.3, wcsncmp.3, wcsncpy.3, wcsnlen.3, wcsnrtombs.3, wcsrtombs.3, wcsstr.3, wcstok.3, wcstombs.3, wcwidth.3, wprintf.3, console_codes.4, dsp56k.4, full.4, initrd.4, loop.4, vcs.4, charmap.5, core.5, elf.5, locale.5, proc.5, repertoiremap.5, sysfs.5, termcap.5, aio.7, bpf-helpers.7, cgroups.7, charsets.7, complex.7, fanotify.7, feature_test_macros.7, inotify.7, locale.7, man-pages.7, man.7, pkeys.7, pthreads.7, rtld-audit.7, sock_diag.7, unix.7, user_namespaces.7, utf-8.7: Use '\e' rather than '\\' to get a backslash
...
Quoting Branden:
*roff escape sequences may sometimes look like C escapes, but that
is misleading. *roff is in part a macro language and that means
recursive expansion to arbitrary depths.
You can get away with "\\" in a context where no macro expansion
is taking place, but try to spell a literal backslash this way in
the argument to a macro and you will likely be unhappy with
results.
Try viewing the attached file with "man -l".
"\e" is the preferred and portable way to get a portable "escape
literal" going back to CSTR #54 , the original Bell Labs troff
paper.
groff(7) discusses the issue:
\\ reduces to a single backslash; useful to delay its
interpretation as escape character in copy mode. For a
printable backslash, use \e, or even better \[rs], to be
independent from the current escape character.
As of groff 1.22.4, groff_man(7) does as well:
\e Widely used in man pages to represent a backslash output
glyph. It works reliably as long as the .ec request is
not used, which should never happen in man pages, and it
is slightly more portable than the more exact ‘\(rs’
(“reverse solidus”) escape sequence.
People not concerned with portability to extremely old troffs should
probably just use \(rs (or \[rs]), as it means "the backslash
glyph", not "the glyph corresponding to whatever the current escape
character is".
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2019-02-27 15:32:50 +01:00
839d161f0f
clone.2: srcfix
...
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2018-12-01 09:21:05 +01:00
d6868c69b3
clone.2: Pending CLONE_NEWPID prevents thread creation
...
See copy_process() in kernel/fork.c:
if (clone_flags & CLONE_THREAD) {
if ((clone_flags & (CLONE_NEWUSER | CLONE_NEWPID)) ||
(task_active_pid_ns(current) !=
current->nsproxy->pid_ns_for_children))
return ERR_PTR(-EINVAL);
}
current->nsproxy->pid_ns_for_children is where unshare(CLONE_NEWPID)
stashes the pending namespace.
Signed-off-by: Jann Horn <jannh@google.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2018-11-24 08:13:11 +01:00
d6bec36eca
clone.2, prctl.2, st.4, proc.5: Change references to '2.6.0-test*' series kernels to just '2.6.0'
...
The extra detail has little of noting with -test 2.6.0
added a particular feature has little value these days,
and is likely to confuse some readers who don't know
(and probably don't care) about the historical details.
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2018-11-19 13:09:55 +01:00
9d32816ba3
clone.2: tfix
...
Signed-off-by: Jakub Wilk <jwilk@jwilk.net>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2018-10-27 08:58:11 +02:00
9b9c895c50
clone.2: Minor fixes to Eugene's patch
...
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2018-10-14 16:20:48 +02:00
8016cc9034
clone.2: Add information about clone and clone2 on IA-64
...
Note that clone() definition on IA-64 is the same as on
SH/Tile/Alpha, align __clone2 declarations in line with the
previous ones, add clone2 syscall prototype.
Signed-off-by: Eugene Syromyatnikov <evgsyr@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2018-10-14 16:19:20 +02:00
f957eebd2d
clone.2: Clarify the discussion of threads and signals
...
And explicitly introduce the terms "process-directed" and
"thread-directed" signals.
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2018-09-10 11:26:34 +02:00
475c27532a
clone.2: Rework discussion of threads and signals
...
The discussion is phrased in terms of signals send using kill(2),
but applies equally to a signal sent by the kernel.
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2018-09-10 11:08:31 +02:00
231d0bbe7e
clone.2: ERRORS: EINVAL occurs with CLONE_NEWUSER if !CONFIG_USER_NS
...
Note that EINVAL can occur with CLONE_NEWUSER if the kernel was
not configured with CONFIG_USER_NS.
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2018-07-28 20:38:03 +02:00
832fe8eab7
clone.2: tfix
...
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2018-07-28 20:37:04 +02:00
6bd80e8b63
clone.2: wfix
...
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2018-03-16 08:50:36 +01:00
82f9cb98f6
clone.2: wfix
...
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2018-03-16 08:50:36 +01:00
6f34a82c42
clone.2: Add a reference to new veth(4) page
...
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2017-10-20 10:22:58 +02:00
9ea5bc667b
clone.2, getcpu.2, shmget.2, syscall.2, dladdr.3, proc.5, vdso.7: Consistently use "x86-64", not "x86_64"
...
When referring to the architecture, consistently use "x86-64",
not "x86_64". Hitherto, there was a mixture of usages, with
"x86-64" predominant.
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2017-10-18 09:26:12 +02:00
b219e68cfa
clone.2: Combine redundant paragraphs describing child_stack==NULL
...
Combine two redundant paragraphs (one of which I recently
added) describing child_stack==NULL for the raw system call.
Also, make sure this text is in a more obvious place than
its previous location.
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2017-10-18 08:53:43 +02:00
1c173eb337
clone.2: Rework the discussion of the historical CLONE_PID for clarity
...
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2017-10-18 08:45:32 +02:00
2551f80148
clone.2: ffix
...
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2017-10-18 08:45:32 +02:00
e5f3df4833
clone.2: Remove a redundant paragraph
...
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2017-10-18 08:45:32 +02:00
7495cbc7b3
clone.2: Eliminate some redundant phrasing in discussion of "fn()"
...
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2017-10-18 08:45:32 +02:00
4ba17a6deb
clone.2: Minor wording fixes
...
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2017-10-18 08:45:32 +02:00
1c6ebc4b4c
clone.2: Warn that the clone() wrapper modifies child_stack in the parent
...
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2017-10-17 22:24:49 +02:00
1874193ebf
clone.2: Add NOTES heading
...
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2017-10-17 22:17:26 +02:00
d35f5c3402
clone.2: Note that child_stack can be NULL when using the raw system call
...
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2017-10-17 15:52:54 +02:00
161fce30ef
clone.2: Minor wording fix (in preparation for subsequent patch)
...
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2017-10-17 15:51:43 +02:00
35bf8cb47f
clone.2: tfix
...
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2017-10-17 14:47:11 +02:00
4b8c67d976
iconv.1, ldd.1, locale.1, localedef.1, memusage.1, memusagestat.1, mtrace.1, pldd.1, sprof.1, time.1, _syscall.2, add_key.2, alloc_hugepages.2, arch_prctl.2, bpf.2, cacheflush.2, capget.2, chdir.2, chmod.2, chown.2, chroot.2, clock_getres.2, clock_nanosleep.2, clone.2, close.2, connect.2, copy_file_range.2, create_module.2, delete_module.2, dup.2, epoll_create.2, epoll_ctl.2, epoll_wait.2, eventfd.2, execve.2, execveat.2, fallocate.2, fanotify_init.2, fcntl.2, flock.2, fork.2, fsync.2, futex.2, futimesat.2, get_kernel_syms.2, get_mempolicy.2, get_robust_list.2, getcpu.2, getdents.2, getdomainname.2, getgid.2, getgroups.2, gethostname.2, getitimer.2, getpagesize.2, getpeername.2, getpriority.2, getrandom.2, getresuid.2, getrlimit.2, getrusage.2, getsid.2, getsockname.2, getsockopt.2, gettid.2, gettimeofday.2, getuid.2, getunwind.2, init_module.2, inotify_add_watch.2, inotify_init.2, inotify_rm_watch.2, intro.2, io_cancel.2, io_destroy.2, io_getevents.2, io_setup.2, io_submit.2, ioctl_console.2, ioctl_fat.2, ioctl_ficlonerange.2, ioctl_fideduperange.2, ioctl_getfsmap.2, ioctl_iflags.2, ioctl_list.2, ioctl_ns.2, ioctl_tty.2, ioctl_userfaultfd.2, ioperm.2, iopl.2, ioprio_set.2, ipc.2, kcmp.2, kexec_load.2, keyctl.2, kill.2, link.2, listen.2, listxattr.2, llseek.2, lookup_dcookie.2, lseek.2, madvise.2, mbind.2, membarrier.2, memfd_create.2, migrate_pages.2, mincore.2, mkdir.2, mknod.2, mlock.2, mmap.2, mmap2.2, modify_ldt.2, move_pages.2, mprotect.2, mq_getsetattr.2, mremap.2, msgctl.2, msgget.2, msgop.2, msync.2, nanosleep.2, nfsservctl.2, nice.2, open.2, open_by_handle_at.2, outb.2, perf_event_open.2, perfmonctl.2, personality.2, pivot_root.2, pkey_alloc.2, poll.2, posix_fadvise.2, prctl.2, pread.2, process_vm_readv.2, ptrace.2, query_module.2, quotactl.2, read.2, readahead.2, readdir.2, readlink.2, readv.2, reboot.2, recv.2, recvmmsg.2, remap_file_pages.2, rename.2, request_key.2, restart_syscall.2, rt_sigqueueinfo.2, s390_pci_mmio_write.2, s390_runtime_instr.2, sched_get_priority_max.2, sched_rr_get_interval.2, sched_setaffinity.2, sched_setattr.2, sched_setparam.2, sched_setscheduler.2, sched_yield.2, seccomp.2, select.2, select_tut.2, semctl.2, semget.2, semop.2, send.2, sendfile.2, sendmmsg.2, set_mempolicy.2, set_thread_area.2, set_tid_address.2, seteuid.2, setfsgid.2, setfsuid.2, setgid.2, setns.2, setpgid.2, setresuid.2, setreuid.2, setsid.2, setuid.2, sgetmask.2, shmctl.2, shmget.2, shmop.2, sigaction.2, sigaltstack.2, signal.2, sigpending.2, sigprocmask.2, sigreturn.2, sigsuspend.2, sigwaitinfo.2, socket.2, socketcall.2, socketpair.2, splice.2, spu_create.2, spu_run.2, stat.2, statfs.2, statx.2, subpage_prot.2, swapon.2, symlink.2, sync.2, sync_file_range.2, syscall.2, syscalls.2, sysctl.2, sysfs.2, sysinfo.2, syslog.2, tee.2, time.2, timer_create.2, timer_getoverrun.2, timer_settime.2, timerfd_create.2, times.2, tkill.2, truncate.2, umask.2, umount.2, uname.2, unimplemented.2, unlink.2, unshare.2, uselib.2, userfaultfd.2, ustat.2, utime.2, utimensat.2, vfork.2, vmsplice.2, wait.2, wait4.2, write.2, CPU_SET.3, INFINITY.3, __ppc_get_timebase.3, __ppc_set_ppr_med.3, __ppc_yield.3, __setfpucw.3, acos.3, acosh.3, adjtime.3, aio_fsync.3, aio_init.3, aio_read.3, aio_return.3, aio_suspend.3, aio_write.3, alloca.3, argz_add.3, asin.3, asinh.3, asprintf.3, assert.3, assert_perror.3, atan.3, atan2.3, atanh.3, atexit.3, backtrace.3, basename.3, bindresvport.3, bsd_signal.3, bsearch.3, bswap.3, btree.3, byteorder.3, bzero.3, canonicalize_file_name.3, carg.3, cbrt.3, ccos.3, ccosh.3, ceil.3, cexp.3, cfree.3, clearenv.3, clock.3, clock_getcpuclockid.3, clog.3, clog10.3, clog2.3, cmsg.3, confstr.3, copysign.3, cos.3, cosh.3, crypt.3, csin.3, csinh.3, csqrt.3, ctan.3, ctanh.3, ctime.3, dbopen.3, dl_iterate_phdr.3, dladdr.3, dlerror.3, dlinfo.3, dlopen.3, dlsym.3, drand48.3, drand48_r.3, duplocale.3, encrypt.3, end.3, endian.3, envz_add.3, erf.3, erfc.3, err.3, errno.3, error.3, ether_aton.3, euidaccess.3, exec.3, exit.3, exp.3, exp10.3, exp2.3, expm1.3, fabs.3, fcloseall.3, fdim.3, fenv.3, ferror.3, fexecve.3, fflush.3, ffs.3, fgetc.3, fgetgrent.3, fgetpwent.3, finite.3, floor.3, fma.3, fmax.3, fmemopen.3, fmin.3, fmod.3, fmtmsg.3, fopen.3, fopencookie.3, fpclassify.3, fpurge.3, fputwc.3, fputws.3, frexp.3, fseek.3, fseeko.3, ftime.3, fts.3, ftw.3, futimes.3, gamma.3, gcvt.3, get_nprocs_conf.3, get_phys_pages.3, getaddrinfo.3, getaddrinfo_a.3, getauxval.3, getcontext.3, getcwd.3, getdate.3, getentropy.3, getenv.3, getfsent.3, getgrent.3, getgrent_r.3, getgrnam.3, getgrouplist.3, gethostbyname.3, gethostid.3, getifaddrs.3, getipnodebyname.3, getline.3, getlogin.3, getmntent.3, getnameinfo.3, getnetent.3, getnetent_r.3, getopt.3, getprotoent.3, getprotoent_r.3, getpw.3, getpwent.3, getpwent_r.3, getpwnam.3, getrpcent.3, getrpcent_r.3, getrpcport.3, gets.3, getservent.3, getservent_r.3, getspnam.3, getsubopt.3, getttyent.3, getumask.3, getutent.3, getwchar.3, glob.3, gnu_get_libc_version.3, grantpt.3, gsignal.3, hash.3, hsearch.3, hypot.3, iconv.3, iconv_close.3, iconv_open.3, if_nameindex.3, if_nametoindex.3, ilogb.3, inet.3, inet_net_pton.3, inet_ntop.3, inet_pton.3, initgroups.3, insque.3, intro.3, isalpha.3, isgreater.3, j0.3, key_setsecret.3, killpg.3, ldexp.3, lgamma.3, lio_listio.3, lockf.3, log.3, log10.3, log1p.3, log2.3, logb.3, login.3, lrint.3, lround.3, lsearch.3, lseek64.3, makecontext.3, makedev.3, mallinfo.3, malloc.3, malloc_get_state.3, malloc_info.3, malloc_stats.3, malloc_trim.3, malloc_usable_size.3, mallopt.3, matherr.3, mbsnrtowcs.3, mbsrtowcs.3, mbstowcs.3, mcheck.3, memccpy.3, memchr.3, memcmp.3, memcpy.3, mkfifo.3, mkstemp.3, mktemp.3, modf.3, mpool.3, mq_close.3, mq_getattr.3, mq_notify.3, mq_open.3, mq_receive.3, mq_send.3, mtrace.3, newlocale.3, nextafter.3, nextup.3, nl_langinfo.3, ntp_gettime.3, offsetof.3, on_exit.3, open_memstream.3, opendir.3, openpty.3, perror.3, popen.3, posix_fallocate.3, posix_madvise.3, posix_memalign.3, posix_openpt.3, posix_spawn.3, pow.3, pow10.3, printf.3, profil.3, program_invocation_name.3, psignal.3, pthread_atfork.3, pthread_attr_init.3, pthread_attr_setaffinity_np.3, pthread_attr_setdetachstate.3, pthread_attr_setguardsize.3, pthread_attr_setinheritsched.3, pthread_attr_setschedparam.3, pthread_attr_setschedpolicy.3, pthread_attr_setscope.3, pthread_attr_setstack.3, pthread_attr_setstackaddr.3, pthread_attr_setstacksize.3, pthread_cancel.3, pthread_cleanup_push.3, pthread_cleanup_push_defer_np.3, pthread_create.3, pthread_detach.3, pthread_exit.3, pthread_getattr_default_np.3, pthread_getattr_np.3, pthread_getcpuclockid.3, pthread_join.3, pthread_kill.3, pthread_kill_other_threads_np.3, pthread_self.3, pthread_setaffinity_np.3, pthread_setcancelstate.3, pthread_setconcurrency.3, pthread_setname_np.3, pthread_setschedparam.3, pthread_sigmask.3, pthread_sigqueue.3, pthread_testcancel.3, pthread_tryjoin_np.3, ptsname.3, putgrent.3, putpwent.3, qsort.3, random.3, random_r.3, rcmd.3, re_comp.3, readdir.3, realpath.3, recno.3, regex.3, remainder.3, remove.3, remquo.3, resolver.3, rexec.3, rint.3, round.3, rpc.3, rpmatch.3, rtime.3, scalb.3, scalbln.3, scandir.3, scanf.3, sched_getcpu.3, sem_close.3, sem_destroy.3, sem_getvalue.3, sem_init.3, sem_open.3, sem_wait.3, setaliasent.3, setbuf.3, setenv.3, setlocale.3, setlogmask.3, setnetgrent.3, shm_open.3, signbit.3, significand.3, sigpause.3, sigqueue.3, sigset.3, sigvec.3, sin.3, sincos.3, sinh.3, sleep.3, sockatmark.3, sqrt.3, statvfs.3, stdarg.3, stdin.3, strcasecmp.3, strcat.3, strchr.3, strcoll.3, strcpy.3, strdup.3, strerror.3, strfmon.3, strfromd.3, strftime.3, strptime.3, strsignal.3, strstr.3, strtod.3, strtok.3, strtol.3, strtoul.3, strverscmp.3, syslog.3, system.3, sysv_signal.3, tan.3, tanh.3, telldir.3, tempnam.3, termios.3, tgamma.3, timeradd.3, tmpnam.3, toupper.3, towlower.3, towupper.3, trunc.3, ttyslot.3, tzset.3, ualarm.3, ulimit.3, undocumented.3, unlocked_stdio.3, updwtmp.3, uselocale.3, usleep.3, wcrtomb.3, wcsdup.3, wcsnrtombs.3, wcsrtombs.3, wcstombs.3, wctob.3, wcwidth.3, wordexp.3, wprintf.3, xcrypt.3, xdr.3, y0.3, cciss.4, console_codes.4, dsp56k.4, fuse.4, hd.4, hpsa.4, initrd.4, intro.4, loop.4, random.4, rtc.4, sd.4, sk98lin.4, st.4, wavelan.4, acct.5, core.5, elf.5, filesystems.5, host.conf.5, hosts.5, locale.5, nologin.5, proc.5, resolv.conf.5, rpc.5, slabinfo.5, utmp.5, aio.7, arp.7, bootparam.7, capabilities.7, cgroup_namespaces.7, cgroups.7, charsets.7, cpuset.7, ddp.7, environ.7, epoll.7, fanotify.7, feature_test_macros.7, futex.7, inode.7, inotify.7, ip.7, ipv6.7, keyrings.7, locale.7, man-pages.7, man.7, math_error.7, mount_namespaces.7, mq_overview.7, namespaces.7, netdevice.7, netlink.7, packet.7, pipe.7, pkeys.7, pthreads.7, pty.7, raw.7, rtld-audit.7, rtnetlink.7, sched.7, session-keyring.7, signal.7, sock_diag.7, socket.7, spufs.7, suffixes.7, tcp.7, udp.7, udplite.7, unicode.7, units.7, unix.7, uri.7, user_namespaces.7, vdso.7, x25.7, xattr.7, iconvconfig.8, ld.so.8, ldconfig.8, sln.8: Update timestamps
...
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2017-09-15 12:44:56 +02:00
7a34607716
clone.2: ffix
...
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2017-08-19 13:47:26 +02:00
b76974c1ec
locale.1, pldd.1, bpf.2, clone.2, copy_file_range.2, dup.2, execve.2, futex.2, get_kernel_syms.2, getdents.2, getrlimit.2, getunwind.2, init_module.2, ioctl_console.2, ioctl_ficlonerange.2, ioctl_fideduperange.2, ioctl_ns.2, ioctl_tty.2, ioctl_userfaultfd.2: ffix
...
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2017-08-19 13:47:26 +02:00
47f743f12e
chroot.2, clone.2, epoll_wait.2, execve.2, getgroups.2: ffix
...
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2017-08-16 23:18:50 +02:00
e7d0bb4715
memusage.1, clone.2, eventfd.2, futex.2, getdents.2, ioctl_fat.2, ioctl_ns.2, kcmp.2, keyctl.2, mmap.2, mprotect.2, msgop.2, recvmmsg.2, request_key.2, sched_setaffinity.2, seccomp.2, setns.2, tee.2, timer_create.2, timerfd_create.2, unshare.2, userfaultfd.2, wait.2, __ppc_get_timebase.3, backtrace.3, bswap.3, clock_getcpuclockid.3, dl_iterate_phdr.3, dlinfo.3, dlopen.3, duplocale.3, end.3, endian.3, fmemopen.3, fopencookie.3, frexp.3, ftw.3, getdate.3, getgrouplist.3, getifaddrs.3, getprotoent_r.3, getservent_r.3, gnu_get_libc_version.3, if_nameindex.3, inet.3, inet_net_pton.3, inet_pton.3, insque.3, makecontext.3, mallinfo.3, malloc_info.3, mallopt.3, matherr.3, mbstowcs.3, mcheck.3, mq_getattr.3, mq_notify.3, newlocale.3, offsetof.3, posix_spawn.3, pthread_attr_init.3, pthread_cancel.3, pthread_cleanup_push.3, pthread_create.3, pthread_getattr_default_np.3, pthread_getattr_np.3, pthread_getcpuclockid.3, pthread_setname_np.3, pthread_setschedparam.3, pthread_sigmask.3, scandir.3, sem_wait.3, strcat.3, strftime.3, strtok.3, strtol.3, strverscmp.3, loop.4, core.5, aio.7, fanotify.7, feature_test_macros.7, inotify.7, pkeys.7, unix.7, user_namespaces.7: Use .EX/.EE for EXAMPLE programs
...
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2017-08-16 10:44:33 +02:00
efeece0465
_syscall.2, bpf.2, cacheflush.2, capget.2, chdir.2, chmod.2, chroot.2, clock_getres.2, clock_nanosleep.2, clone.2, close.2, connect.2, copy_file_range.2, create_module.2, delete_module.2, dup.2, epoll_create.2, epoll_ctl.2, epoll_wait.2, eventfd.2, execve.2, execveat.2, fallocate.2, flock.2, fork.2, fsync.2, futex.2, futimesat.2, get_kernel_syms.2, get_mempolicy.2, get_robust_list.2, getcpu.2, getdents.2, getdomainname.2, getgid.2, getgroups.2, gethostname.2, getitimer.2, getpagesize.2, getpeername.2, getpriority.2, getrandom.2, getresuid.2, getrlimit.2, getrusage.2, getsid.2, getsockname.2, getsockopt.2, gettid.2, gettimeofday.2, getuid.2, getunwind.2, init_module.2, inotify_add_watch.2, inotify_init.2, inotify_rm_watch.2, intro.2, io_cancel.2, io_destroy.2, io_getevents.2, io_setup.2, io_submit.2, ioctl_fat.2, ioctl_ficlonerange.2, ioctl_fideduperange.2, ioctl_tty.2, ioctl_userfaultfd.2, ioperm.2, iopl.2, ioprio_set.2, kcmp.2, kexec_load.2, keyctl.2, kill.2, link.2, listen.2, listxattr.2, llseek.2, lookup_dcookie.2, lseek.2, madvise.2, mbind.2, membarrier.2, memfd_create.2, migrate_pages.2, mincore.2, mkdir.2, mknod.2, mlock.2, mmap.2, mmap2.2, modify_ldt.2, move_pages.2, mprotect.2, mq_getsetattr.2, mremap.2, msgctl.2, msgget.2, msgop.2, msync.2, nanosleep.2, nfsservctl.2, nice.2, open_by_handle_at.2, outb.2, perf_event_open.2, perfmonctl.2, personality.2, pivot_root.2, pkey_alloc.2, poll.2, posix_fadvise.2, prctl.2, pread.2, process_vm_readv.2, ptrace.2, query_module.2, quotactl.2, read.2, readahead.2, readdir.2, readv.2, reboot.2, recv.2, recvmmsg.2, remap_file_pages.2, rename.2, request_key.2, restart_syscall.2, rt_sigqueueinfo.2, s390_pci_mmio_write.2, s390_runtime_instr.2, sched_get_priority_max.2, sched_rr_get_interval.2, sched_setaffinity.2, sched_setattr.2, sched_setparam.2, sched_setscheduler.2, sched_yield.2, seccomp.2, select.2, select_tut.2, semctl.2, semget.2, semop.2, send.2, sendfile.2, sendmmsg.2, set_mempolicy.2, set_thread_area.2, set_tid_address.2, seteuid.2, setfsgid.2, setfsuid.2, setgid.2, setns.2, setpgid.2, setresuid.2, setreuid.2, setsid.2, setuid.2, sgetmask.2, shmctl.2, shmget.2, shmop.2, sigaction.2, sigaltstack.2, sigpending.2, sigprocmask.2, sigreturn.2, sigsuspend.2, sigwaitinfo.2, socket.2, socketcall.2, socketpair.2, splice.2, spu_create.2, spu_run.2, stat.2, statfs.2, statx.2, subpage_prot.2, swapon.2, symlink.2, sync.2, sync_file_range.2, syscalls.2, sysctl.2, sysinfo.2, syslog.2, tee.2, time.2, timer_create.2, timer_getoverrun.2, timer_settime.2, timerfd_create.2, times.2, tkill.2, truncate.2, umask.2, umount.2, unimplemented.2, unlink.2, unshare.2, uselib.2, userfaultfd.2, utime.2, utimensat.2, vfork.2, vmsplice.2, wait.2, wait4.2, write.2: Formatting fix: replace blank lines with .PP/.IP
...
Blank lines shouldn't generally appear in *roff source (other
than in code examples), since they create large vertical
spaces between text blocks.
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2017-08-16 09:30:51 +02:00
dbfe9c700e
_syscall.2, clock_getres.2, clone.2, copy_file_range.2, create_module.2, delete_module.2, fallocate.2, futex.2, get_kernel_syms.2, get_robust_list.2, getcpu.2, getdents.2, gettid.2, gettimeofday.2, getunwind.2, init_module.2, io_cancel.2, io_destroy.2, io_getevents.2, io_setup.2, io_submit.2, ioctl_userfaultfd.2, ioprio_set.2, kcmp.2, kexec_load.2, keyctl.2, link.2, llseek.2, memfd_create.2, mmap.2, mq_getsetattr.2, msgctl.2, msgget.2, open_by_handle_at.2, outb.2, perf_event_open.2, pivot_root.2, process_vm_readv.2, query_module.2, readdir.2, recvmmsg.2, rename.2, request_key.2, restart_syscall.2, rt_sigqueueinfo.2, s390_pci_mmio_write.2, s390_runtime_instr.2, sched_setattr.2, seccomp.2, select.2, select_tut.2, send.2, sendmmsg.2, set_thread_area.2, set_tid_address.2, sgetmask.2, shmop.2, sigaction.2, sigprocmask.2, splice.2, spu_create.2, spu_run.2, statx.2, subpage_prot.2, sync_file_range.2, syscall.2, sysctl.2, sysfs.2, tee.2, timer_create.2, timer_delete.2, timer_getoverrun.2, timer_settime.2, tkill.2, uselib.2, utimensat.2, vmsplice.2, wait.2, aio_init.3, asinh.3, atan2.3, atanh.3, backtrace.3, basename.3, bswap.3, bzero.3, catgets.3, catopen.3, dladdr.3, dlsym.3, endian.3, envz_add.3, erf.3, erfc.3, error.3, ferror.3, ffs.3, fgetc.3, fmemopen.3, fopen.3, fopencookie.3, fseek.3, ftw.3, futimes.3, getdate.3, getenv.3, getline.3, getlogin.3, getrpcent.3, getsubopt.3, getutmp.3, getw.3, gnu_get_libc_version.3, inet_net_pton.3, isalpha.3, lio_listio.3, makedev.3, malloc_get_state.3, malloc_stats.3, malloc_trim.3, malloc_usable_size.3, matherr.3, memchr.3, nextup.3, ntp_gettime.3, posix_madvise.3, program_invocation_name.3, pthread_atfork.3, pthread_attr_setaffinity_np.3, pthread_attr_setdetachstate.3, pthread_attr_setguardsize.3, pthread_attr_setinheritsched.3, pthread_attr_setschedparam.3, pthread_attr_setschedpolicy.3, pthread_attr_setscope.3, pthread_attr_setstack.3, pthread_attr_setstackaddr.3, pthread_attr_setstacksize.3, pthread_cleanup_push_defer_np.3, pthread_detach.3, pthread_equal.3, pthread_exit.3, pthread_join.3, pthread_kill.3, pthread_kill_other_threads_np.3, pthread_rwlockattr_setkind_np.3, pthread_self.3, pthread_setcancelstate.3, pthread_setconcurrency.3, pthread_setschedprio.3, pthread_testcancel.3, pthread_tryjoin_np.3, pthread_yield.3, puts.3, random.3, random_r.3, rpc.3, sched_getcpu.3, setnetgrent.3, sigwait.3, stdin.3, strerror.3, strfmon.3, timeradd.3, tmpnam.3, toupper.3, towlower.3, towupper.3, ttyname.3, uselocale.3, xdr.3, dsp56k.4, sigevent.7, vdso.7: ffix
...
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2017-08-15 19:39:04 +02:00
abcf3b1db9
clone.2: Update BUGS to reflect fact that PID caching was removed in glibc 2.25
...
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2017-07-13 07:45:05 +02:00
734882f4c4
_exit.2, alarm.2, chmod.2, clone.2, epoll_ctl.2, fcntl.2, fork.2, fsync.2, getdents.2, getpid.2, ioctl.2, ioctl_console.2, ioctl_list.2, ioctl_ns.2, ioctl_tty.2, ioctl_userfaultfd.2, kexec_load.2, lseek.2, mincore.2, mkdir.2, mknod.2, mmap.2, open.2, poll.2, posix_fadvise.2, prctl.2, rename.2, sched_setaffinity.2, select.2, select_tut.2, sigaction.2, signalfd.2, sigprocmask.2, sigwaitinfo.2, socketcall.2, stat.2, statx.2, syscalls.2, truncate.2, umask.2, unshare.2, userfaultfd.2, utime.2, utimensat.2, wait.2, bzero.3, cfree.3, exit.3, getentropy.3, grantpt.3, insque.3, shm_open.3, syslog.3, termios.3, ttyname.3, wcsdup.3, console_codes.4, tty.4, vcs.4, elf.5, nsswitch.conf.5, proc.5, slabinfo.5, tmpfs.5, bootparam.7, environ.7, hostname.7, inotify.7, mailaddr.7, man-pages.7, namespaces.7, pid_namespaces.7, pthreads.7, pty.7, sem_overview.7, signal.7, socket.7, tcp.7, termio.7, user_namespaces.7, xattr.7, ld.so.8, zdump.8: tstamp
...
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2017-05-03 19:27:48 +02:00
2f7a331e53
clone.2, unshare.2: Exceeding one of the limits in /proc/sys/user/* can cause ENOSPC
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Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2017-04-19 15:52:03 +02:00
b5742eccf1
clone.2, unshare.2: Exceeding the maximum nested user namespace limit now gives ENOSPC
...
Formerly, if the limit of 32 nested user namespaces was exceeded,
the error EUSERS resulted. Starting with Linux 4.9, the error
is ENOSPC.
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2017-04-19 15:52:03 +02:00
b20e22aeb7
clone.2, unshare.2: CLONE_NEWPID yields ENOSPC if nesting limit of PID namespaces is reached
...
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2017-04-19 15:52:03 +02:00
aa825b59ec
clone.2: CLONE_NEWCGROUP by an unprivileged process also causes an EPERM error
...
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2017-04-19 15:52:03 +02:00
c471c3636d
clone.2: clone() does not execute fork handlers
...
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2017-01-25 00:02:47 +13:00
35deeb8703
bind.2, chmod.2, chown.2, chroot.2, clock_getres.2, clone.2, connect.2, dup.2, fallocate.2, get_mempolicy.2, getpeername.2, getpriority.2, getsockname.2, getsockopt.2, gettimeofday.2, ioctl_ficlonerange.2, ioctl_fideduperange.2, kill.2, mbind.2, mmap.2, mount.2, mprotect.2, nfsservctl.2, nice.2, open.2, perf_event_open.2, pipe.2, pkey_alloc.2, prctl.2, ptrace.2, quotactl.2, remap_file_pages.2, sched_setscheduler.2, set_mempolicy.2, signal.2, signalfd.2, swapon.2, sync_file_range.2, syscalls.2, timer_create.2, timerfd_create.2, utime.2, utimensat.2, wait.2, atof.3, ctime.3, errno.3, fclose.3, fflush.3, insque.3, malloc_get_state.3, mallopt.3, mbsnrtowcs.3, mq_close.3, mq_open.3, mq_receive.3, mq_send.3, printf.3, pthread_attr_init.3, pthread_create.3, pthread_setaffinity_np.3, ptsname.3, remainder.3, strtod.3, tgamma.3, timegm.3, tmpnam.3, ttyname.3, console_ioctl.4, elf.5, filesystems.5, proc.5, utmp.5, capabilities.7, cgroups.7, credentials.7, ddp.7, feature_test_macros.7, fifo.7, inotify.7, libc.7, mount_namespaces.7, namespaces.7, netlink.7, pid_namespaces.7, pkeys.7, shm_overview.7, standards.7, uri.7, user_namespaces.7: tstamp
...
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2016-12-12 10:45:24 +01:00
92b722248a
clone.2: Remove ancient libc5 details
...
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2016-12-09 13:21:56 +01:00
ca8b1e32a9
clone.2: Minor wording fix
...
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2016-10-13 16:53:32 +02:00
b5da2f9178
clone.2: The CLONE_*_SETTID operations store TID before return to user space
...
CLONE_PARENT_SETTID and CLONE_CHILD_SETTID store the new
TID before clone() returns to user space
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2016-10-13 15:48:37 +02:00
4ba5392d3b
clone.2: wfix
...
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2016-10-13 15:46:44 +02:00
2433365bde
clone.2: tfix
...
Reported-by: Elliott Hughes <enh@google.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2016-10-08 20:19:16 +02:00
2a15a76bba
clone.2: Document raw syscall interfaces on various other architectures
...
Reported-by: Josh Triplett <josh@joshtriplett.org>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2016-10-07 09:13:57 +02:00
fda554706b
clone.2: Change types for 'ptid' and 'ctid' in syscall prototypes
...
These types changed from 'void *' to 'int *' back in Linux 3.8.
The new types are closer to reality, so just update the page
without discussing the history.
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2016-10-07 09:13:44 +02:00
dd6d3d2e5f
clone.2: Adjust syscall prototype and expand CLONE_SETTLS description
...
The prototype for the system call was added in kernel commit
81f10dad
2016-09-25 21:00:52 +02:00
4d543007c4
clone.2: tfix
...
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2016-09-16 17:23:09 +02:00
d4748fad9f
clone.2: EINVAL is generated by glibc wrapper for NULL 'fn' or 'child_stack'
...
Clarify that this error is produced by the wrapper function, not
the underlying system call. In particular, the point is that the
raw system call can accommodate a NULL pointer for 'child_stack'.
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2016-09-15 18:39:57 +02:00
984baa3fb3
clone.2: wfix
...
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2016-09-09 07:23:21 +01:00
49dba87f5c
clone.2: tfix
...
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2016-08-24 11:47:52 +12:00
db8ba2b415
clone.2: Make the implications of CLONE_FILES more explicit
...
If CLONE_FILES is not set, the duplicated FDs nevertheless share
file offset and status flags via the open file description.
Reported-by: Elliott Hughes <enh@google.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2016-08-24 11:47:45 +12:00
6717ee8694
clone.2: Order ERRORS alphabetically
...
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2016-08-08 05:54:13 +10:00
79bdcc4a5c
clone.2: Mention kcmp() under notes
...
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2016-07-28 09:34:52 +02:00
3df541c0e6
ldd.1, localedef.1, add_key.2, chroot.2, clone.2, fork.2, futex.2, get_mempolicy.2, get_robust_list.2, getitimer.2, getpriority.2, ioctl.2, ioctl_ficlonerange.2, ioctl_fideduperange.2, kcmp.2, kill.2, lookup_dcookie.2, mmap.2, mount.2, open.2, pciconfig_read.2, perf_event_open.2, prctl.2, process_vm_readv.2, ptrace.2, quotactl.2, recv.2, setfsgid.2, setfsuid.2, sysinfo.2, umask.2, umount.2, unshare.2, utimensat.2, wait.2, assert.3, fmax.3, fmin.3, getauxval.3, inet_pton.3, malloc_hook.3, memmem.3, mkdtemp.3, mktemp.3, printf.3, strcasecmp.3, strcat.3, strtoul.3, strxfrm.3, console_codes.4, console_ioctl.4, lirc.4, tty.4, vcs.4, charmap.5, elf.5, locale.5, proc.5, repertoiremap.5, utmp.5, capabilities.7, cgroup_namespaces.7, cgroups.7, charsets.7, cp1251.7, cp1252.7, credentials.7, feature_test_macros.7, iso_8859-1.7, iso_8859-15.7, iso_8859-5.7, koi8-r.7, koi8-u.7, man-pages.7, mount_namespaces.7, namespaces.7, netlink.7, pid_namespaces.7, unix.7, user_namespaces.7, utf-8.7: tstamp
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Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2016-07-17 18:10:19 +02:00
c212248c77
clone.2: Add reference to mount_namespaces(7) under CLONE_NEWNS description
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Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2016-06-30 06:08:32 +02:00
39b3f0058e
clone.2: tfix
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Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2016-06-30 06:08:32 +02:00
d1f84ed72a
clone.2, confstr.3, hpsa.4, tcp.7: tfix
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Signed-off-by: Jakub Wilk <jwilk@jwilk.net>
2016-06-08 11:24:08 +02:00
Michael Kerrisk