dmesg: correct "-n, --console-level level" example in manual page
When providing an abbreviation of the level name with the option "-n, --console-level level",
it corresponds to the level (included) up to which messages are displayed on the console.
If a level number is given, this level is excluded.
So in the given example, "-n 1" is equivalent to "-n emerg".
Karel Zak [Wed, 12 Dec 2018 11:14:39 +0000 (12:14 +0100)]
mkswap: use dd(1) in example rather than fallocate(1)
The man page warns against fallocate on some filesystems and recommends
dd(1) as the most portable solution. So, let's use dd(1) also in the
example used in the same man page.
Addresses: https://bugzilla.redhat.com/show_bug.cgi?id=1203378 Signed-off-by: Karel Zak <kzak@redhat.com>
Jeremy Linton [Tue, 11 Dec 2018 18:27:29 +0000 (12:27 -0600)]
lscpu: Add aarch32 detection on aarch64
aarch32 support is an optional feature of ARMv8, as CPUs
which don't support aarch32 become more common, lets make
sure that lscpu can tell a user quickly if they are on a
machine that only supports 64-bit.
Signed-off-by: Jeremy Linton <lintonrjeremy@gmail.com>
First three fixes on lines 133, 151, and 280 are cosmetic. Because there
was unobvious null check compiler thought variable might be null, and warned
when after pointer adjustment it was followed without null check. Perhaps
this will not happen sometime in future when compiler is made more smart,
meanwhile lets give better hints to avoid false positive.
The last change addresses issue that is possible, at least in theory.
Sami Kerola [Mon, 10 Dec 2018 20:41:18 +0000 (20:41 +0000)]
lslogins: remove duplicate NULL check
Having this excess NULL check in place causes small performance penalty, and
makes compiler to guess wrong if a null should be checked. To me getting
rid of false positive warning is more useful.
Sami Kerola [Mon, 10 Dec 2018 20:30:59 +0000 (20:30 +0000)]
libsmartcols: fix variable shadowing
libsmartcols/src/grouping.c:115:26: warning: declaration of ‘ln’ shadows a
previous local [-Wshadow]
libsmartcols/src/grouping.c:108:24: note: shadowed declaration is here
Karel Zak [Mon, 10 Dec 2018 10:45:03 +0000 (11:45 +0100)]
fstrim: trim also root FS on --fstab
The root fs ("/") is optional in many case in /etc/fstab. This patch
forces fstrim to read kernel command line for the root= option to get
root FS if the entry is missing in your fstab.
Addresses: https://github.com/karelzak/util-linux/issues/719 Signed-off-by: Karel Zak <kzak@redhat.com>
In this example two line (test-thin-metadata and test-thin-data) are
parents for another line (test-thin-pool). The new API uses term "group"
for parental line -- the number of group members is unlimited and every
group has at least one child.
It's possible that group's child is member of another group:
For now multi-group relation is unsupported and one line can be member
of one group only. The library API and printing code is ready to
support this feature, but not sure if we really need it. All what is
necessary is to create array of groups in the line struct.
Note that grouping is independent on standard parent->child relations
between lines and grouping can connect arbitrary lines. The
restriction is only that group child cannot be child of another line
or child of another group. These cross reference are (and probably
will be) impossible.
The patch is relative large, but easy to review. Changes:
* add new UTF symbols
* add scols_symbols_set_group_* public API to modify new symbols
* add struct libscols_group, used only internally
* add "grpset" array to table struct -- the array is used to keep
position of the group in the output. Every active group uses three
items in the grpset. If there is more overlapping groups than bigger
grpset is allocated.
Karel Zak [Tue, 16 Oct 2018 13:53:22 +0000 (15:53 +0200)]
lsblk: add process_all_devices_inverse()
This is necessary to implement --inverse. Note that this new
implementation scans /sys/dev/block/ to get top-level devices
and than it calls process_one_device().
Note that standard non-inverse tree does not use process_one_device()
as it's more effective to scan /sys/block where are no partitions.
Ruediger Meier [Sun, 2 Dec 2018 18:23:45 +0000 (19:23 +0100)]
include/c: re-add type checking in container_of()
This reverts parts of commit eb06d5d4, which seems to be based on
Linux kernel commit c7acec71. Unlike the original kernel patch we did
not add that even stronger type checking by using macro BUILD_BUG_ON_MSG.
So basically we removed a useful warning when compiling such
broken code:
struct st {
int a;
char b;
};
struct st t = { .a = 1, .b = 2 };
struct st *x = container_of(&t.a, struct st, b);
printf("%p %p\n", (void *)&t, (void *)x);
Moreover we also introduced a new compiler warning for intel/icc:
"arithmetic on pointer to void or function type"
Let's just revert the update of container_of() because adding a
kernel-like BUILD_BUG_ON_MSG would be too much noise and also
problematic (see kernel commit c03567a8). Also note that the original
problem addressed by the kernel commit seems to be only reproducible
with gcc 4.9, not with any later gcc nor clang,icc. Moreover, currently
we have no such use-case in the UL sources anyways.
Karel Zak [Thu, 15 Nov 2018 11:11:29 +0000 (12:11 +0100)]
libmount: (fuse) follow only user_id= on umount
The option user= is already handled by evaluate_permissions() and by
classic mount and umount usermount support. It seems we do not need
to duplicate support for user= in is_fuse_usermount().
The option user_id= is fuse specific and it's maintained by
libfuse/kernel in /proc/self/mountinfo. This is feature we need to
support in umount(8).
Addresses: https://github.com/karelzak/util-linux/pull/705 Signed-off-by: Karel Zak <kzak@redhat.com>
Rian Hunter [Sat, 13 Oct 2018 02:48:47 +0000 (19:48 -0700)]
libmount: Support unmount FUSE mounts
FUSE mounts don't need an fstab entry to be unmounted.
This checks if a mount is a FUSE mount before checking for
the fstab entry, and if so returns success.
[kzak@redhat.com: - use libmount tools for mount options
- use namespace switches
- cleanup code
The requirement is user=<username> or user_id=<uid> in /proc/self/mountinfo
for fuse filesystem. The logic is the same as for user= mount options, but in
this case it is not maintained by libmount in userspace, but by fuse FS in kernel.]
Co-Author: Karel Zak <kzak@redhat.com> Signed-off-by: Karel Zak <kzak@redhat.com>
Rian Hunter [Sat, 13 Oct 2018 02:45:06 +0000 (19:45 -0700)]
lib/canonicalize: do restricted canonicalize in a subprocess
Accessing FUSE mounts require suid/sgid (saved uid) to be equal to the
owner of the mount. If mount is running as a setuid process, swapping
creds by only setting the euid/egid isn't enough to change the
suid/sgid as well. We must do a full setuid()/setgid(), but that
removes our ability to re-assume the identity of the original
euid. The solution is swap creds in a child process, preserving the
creds of the parent.
[kzak@redhat.com: - use switch() rather than if() for fork
- use all-io.h
- close unused pipe[] ends
- be more strict about used types]
Addresses: https://github.com/karelzak/util-linux/pull/705
Co-Author: Karel Zak <kzak@redhat.com> Signed-off-by: Karel Zak <kzak@redhat.com>
Karel Zak [Thu, 29 Nov 2018 12:21:36 +0000 (13:21 +0100)]
blkid: make PART_ENTRY_* tags optional (add --no-part-details)
blkid(8) returns information from partition table also for empty
partitions. This is necessary for example for udev, but it could be
confusing if you care about on-device content only.
Stanislav Brabec [Mon, 19 Nov 2018 23:38:14 +0000 (00:38 +0100)]
agetty: Return old behavior with empty logname
c094fcd37 introduced a behavior change: When Return is entered with empty
logname, nothing happens. As it confuses users, return back the old
behavior: re-prompt.
Paul Asmuth [Fri, 9 Nov 2018 16:02:11 +0000 (17:02 +0100)]
fix a bug where switch_root would erroneously try to parse initargs
before this change, switch_root would try to parse all arguments,
including 'initargs', using getopt, which would lead to an 'unrecognized
option' error when trying to pass a flag to the init program
projects / thirdparty / util-linux.git / log
