Usecases:
* Compare current monotonic time to timestamps reported by systemd
* Validate time namespace operations
* Inspect clock resolutions
Signed-off-by: Thomas Weißschuh <thomas@t-8ch.de>
When this option is used nsenter will fetch the parent user
namespace from any namespace file descriptors available.
It can be combined with existing `--user` option in which case
the parent user namespace will be fetched from the user namespace
and replace it.
The usecase of this option is when a user namespace that owns
the other type namespaces we want to switch to is not actually
bound to any process. Without using ioctl it is impossible to
acquire namespace file descriptor. For example, bubblewrap
`bwrap` command creates unbinded user namespace when `--dev`
option is used.
Making the argument to -S and -G optional in #2092 broke the cli
compatability.
So replace it with an explicit "follow" argument that provides the new
functionality with a compatible interface.
Fixes#2143
This commit adds support for the -e or --env option in nsenter, allowing a new process to inherit the environment va
If the option is not given, the environment variables will stay the same as in the current namespace.
Example:
Setup the namespace:
$ docker run -d -e PROJECT='util linux' --rm alpine sleep 10000
cb0b69aa7aec
$ docker inspect --format '{{ .State.Pid }}' cb0b69aa7aec
470012
Enter the namespace:
$ nsenter --all -t 470012 --env env
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
HOSTNAME=cb0b69aa7aec
PROJECT=util linux
HOME=/root
Reviewed-by: Thomas Weißschuh <thomas@t-8ch.de>
Reviewed-by: Karel Zak <kzak@redhat.com>
Signed-off-by: u2386 <hugo.cavan2386@gmail.com>
This command implements waiting for the exit of multiple processes.
Especially it allows to wait for process that are not children of the
current process.
In contrast to wait(1P) it does not allow to retrieve the processes exit
codes.
Typically a modern block device supports mutil queues feature, count
queues by walking '$sysfs/mq' directory. If no '$sysfs/mq' exists, it
is a legacy single queue.
~# lsblk --nvme -o NAME,TYPE,MODEL,TRAN,RQ-SIZE,MQ
NAME TYPE MODEL TRAN RQ-SIZE MQ
nvme0n1 disk INTEL SSDPF2KX038TZ nvme 1023 135
nvme3n1 disk INTEL SSDPE2KX020T8 nvme 1023 128
nvme1n1 disk SAMSUNG MZQL23T8HCLS-00A07 nvme 1023 129
nvme2n2 disk RP2A03T8RK004LX nvme 1023 64
nvme2n3 disk RP2A03T8RK004LX nvme 1023 64
Signed-off-by: zhenwei pi <pizhenwei@bytedance.com>
Add -N/--nvme to filter NVMe device only, NVMe usually has a larger
I/O depth, also show COL_RQ_SIZE by default.
Signed-off-by: zhenwei pi <pizhenwei@bytedance.com>
Specify cpus list format to show by -C/--cpu-list parameters, for
example, on an AMD server with 192 CPUs, to show statistics on NUMA
node 1:
~# ./irqtop -d 1 -C 48-95,144-191
Signed-off-by: zhenwei pi <pizhenwei@bytedance.com>
Implement the RTC_PARAM_SET RTC ioctl in hwclock. The ioctl interface was
introduced with [1], which went mainline in Kernel v5.16. The parameters
are independent of hardware/driver. This means we can read and set
parameters in a generic way.
The new --param-set hwclock function accepts aliases for parameters
currently existent (Kernel v5.16). They can be extended later on. As
fallback and for values, hexadecimal (if prefixed with 0x) and decimal
values, as defined in [2], are accepted.
Example:
$ hwclock --param-set bsm=0x0
[1] https://lore.kernel.org/all/20211018151933.76865-1-alexandre.belloni@bootlin.com/
[2] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/include/uapi/linux/rtc.h
Signed-off-by: Bastian Krause <bst@pengutronix.de>
Implement the RTC_PARAM_GET RTC ioctl in hwclock. The ioctl interface was
introduced with [1], which went mainline in Kernel v5.16. The parameters
are independent of hardware/driver. This means we can read and set
parameters in a generic way.
The new --param-get hwclock function accepts aliases for parameters
currently existent (Kernel v5.16). They can be extended later on. As
fallback, hexadecimal (if prefixed with 0x) and decimal values, as
defined in [2], are accepted.
Example:
$ hwclock --param-get features
[1] https://lore.kernel.org/all/20211018151933.76865-1-alexandre.belloni@bootlin.com/
[2] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/include/uapi/linux/rtc.h
Signed-off-by: Bastian Krause <bst@pengutronix.de>
The current option --backup is usable only when used with others sfdisk
commands. The new command --backup-pt-sectors create backup and exit.
Signed-off-by: Karel Zak <kzak@redhat.com>
The current --wd=<dir> changes CWD to the path which is opened
*before* nsenter calls setns(). It may be useful if you want to use in
namespace something from your current namespace. In this case, the
option --wd works like a "tunnel" between namespaces.
For some other use-cases, this is useless and you want to be sure that
CWD always points to the target namespace. For this purpose this patch
implements --wdns <dir>.
Example:
Setup the namespaces:
# unshare --mount
# mount /dev/sdc /mnt/A
# touch /mnt/A/fooooo
# echo $$
2425872
Enter the namespace from another session:
# nsenter --all --target 2425872 --wd=/mnt/A ls -a
. ..
# nsenter --all --target 2425872 --wdns=/mnt/A ls -a
. .. fooooo lost+found
Fixes: https://github.com/util-linux/util-linux/issues/1500
Signed-off-by: Karel Zak <kzak@redhat.com>
Since a23aecc1bf("irqtop: add per-cpu stats"), irqtop always shows
per-cpu stats. Test on a modern AMD server with 2 socket(256 CPU),
irqtop shows messy output with too many columns.
In this patch, add -c/--cpu-stat option to enable/disable per-cpu stats.
And 'auto' option auto-detect window size, only show per-cpu stats
if the length of per-cpu stats is shorter than the width of window.
[kzak@redhat.com: - shorten the commit message
- rename --cpu to --cpu-stat
- use scols_table_enable_nowrap() rather than trim in irqtop.c
- reduce --help for the new option]
Signed-off-by: zhenwei pi <pizhenwei@bytedance.com>
Signed-off-by: Karel Zak <kzak@redhat.com>
Several parameters for zoned devices are missing from lsblk's columns. This
commit introduces them as following.
ZONE-SZ zone size
ZONE-WGRAN zone write granularity
ZONE-APP zone append max bytes
ZONE-NR number of zones
ZONE-OMAX maximum number of open zones
ZONE-AMAX maximum number of active zones
Reviewed-by: Damien Le Moal <damien.lemoal@wdc.com>
Signed-off-by: Naohiro Aota <naohiro.aota@wdc.com>
