Acked-by: Christian Brauner <christian.brauner@ubuntu.com>
Signed-off-by: Adrian Reber <areber@redhat.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
The man page contains a trivial bug that's discussed here:
https://stackoverflow.com/q/59628958
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
Fixes: d8d701003 ("malloc.3: Since glibc 2.29, realloc() is exposed by
defining _DEFAULT_SOURCE")
Signed-off-by: Petr Vorel <pvorel@suse.cz>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
The glibc implementation of getpt has actually never been setting
O_NOCTTY when opening /dev/ptmx or BSD ptys.
Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
Linux kernel commit e78bbfa82624 ("mm: stop returning -ENOENT from
sys_move_pages() if nothing got migrated") had the effect of
*never* returning -ENOENT, in any situation. So we need to update
the man page to reflect that ENOENT is not a possible return
value.
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Brice Goglin <Brice.Goglin@inria.fr>
Cc: Yang Shi <yang.shi@linux.alibaba.com>
Cc: Christoph Lameter <cl@linux.com>
Signed-off-by: John Hubbard <jhubbard@nvidia.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
PVS-Studio reports that in
char buf[8192];
/* ... */
nh = (struct nlmsghdr *) buf,
the pointer 'buf' is cast to a more strictly aligned pointer type.
This is undefined behaviour. One possible solution to make sure
that buf is correctly aligned is to declare buf as an array of
struct nlmsghdr. Other solutions include allocating the array on
the heap, use an union, or stdalign features. With this patch,
the buffer still contains 8192 bytes.
This was raised on Stack Overflow:
https://stackoverflow.com/questions/57745580/netlink-receive-buffer-alignment
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
Historically (before Linux 2.6.23), base_addr was unsigned long
for 32-bit code and unsigned int for 64-bit code. In other words,
it was always a 32-bit value. When the ldt.h header files were
unified, the type became unsigned int on all systems. Update
modify_ldt.2 and set_thread_area.2 accordingly.
Indeed, on x86, the GDT and LDT specify 32-bit bases for code and
data segments, and this has nothing to do with the kernel.
Reported-by: "Metzger, Markus T" <markus.t.metzger@intel.com>
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
The programmer should not need to care about the numeric values,
and their inclusion is verbosity.
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
Since kernel commit 3dd4d40b4208("xfs: Sanity check flags
of Q_XQUOTARM call"), it has added flags check. If it is
not usr,grp,prj quota type, it will report EINVAL.
Signed-off-by: Yang Xu <xuyang2018.jy@cn.fujitsu.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
The definition of the tpacket_auxdata struct in the manpage is not
the same as the definition found in
/include/uapi/linux/if_packet.h.
In particular, instead of a tp_padding field, there is a
tp_vlan_tpid field. An example of a project using this field is
libpcap[1].
[1]: https://github.com/the-tcpdump-group/libpcap/blob/master/pcap-linux.c#L349
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
Added two missing parentheses
Acked-by: Christian Brauner <christian.brauner@ubuntu.com>
Signed-off-by: Adrian Reber <areber@redhat.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
This surely meant to say clone3() and not clone(3).
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
The CLONE_PARENT flag cannot but used by init processes. Let's mention
this in the manpages to prevent surprises.
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
The introductory paragraphs note that "the calling process" is
normally synonymous with the "the parent process", except in the
case of CLONE_PARENT. The same is also true of CLONE_THREAD.
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
Michael Kerrisk