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There's no reason to eat up ENOENT, it should be OK to simply report the
error back.
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mount point
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- Move to its own file rm-rf.c
- Change parameters into a single flags parameter
- Remove "honour sticky" logic, it's unused these days
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found with coverty report
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I shall not use alloca() within loops
I shall not use alloca() within loops
I shall not use alloca() within loops
I shall not use alloca() within loops
...
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Use the standard FOREACH_WORD* macros.
The current code was broken in the devlink case so the last one received
was being dropped, causing https://bugs.freedesktop.org/show_bug.cgi?id=89894
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unnecessarily
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This was getting leaked as a copy was added to the hashmap, simply add the
returned value instead.
This should fix CID #1292806.
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sysnum would not be initialized if sysname had no trailing digits.
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* kill unnecessary {}
* add newlines where appropriate
* remove dead code
* reorder variable declarations
* fix more return code logic
* pass O_CLOEXEC to all open*() calles
* use safe_close() where possible
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This code is in a confusingly bad shape. Kill a bunch of global variables
and pass needed variables around in function calls.
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Retrieve the handle to procfs in main(), and pass it functions
that need it. Kill the global variables.
Also, refactor lots of code in svg_title(). There's no need to access any
global variables from there either, and we really should return proper
errors from there as well.
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Don't blindly exit() from random functions, but return a proper error
and upchain error conditions.
squash! bootchart: clean up control flow logic
When pread() returns "0", it's a read failure, so don't make the caller think
log_sample() was successful, return meaningful error code instead of 0.
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Let the helper functions take care of the string message output.
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- print runtime warnings with log_warning()
- save and restore $TZ properly
- Get rid of exit() pseudo error handling
- Using time() is OK when connecting to a local container or when
showing data about local host, but certainly not for remote hosts.
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This provides equivalent functionality to libudev-device, but in the
systemd style. The public API only caters to creating sd_device objects
from for devices that already exist in /sys, there is no support for
listening for monitoring events or creating devices received over
the udev netlink protocol.
The private API contains the necessary functionality to make sd-device
a drop-in replacement for libudev-device, but which we would not
otherwise want to export.
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The dev_port concept is a bit confusing, expand on the comment a bit.
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I'd argue that having firmware labels for such devices makes
no sense, but they exist, so make sure we handle them as best
as we can.
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In case pci_slot overflows we were truncating pci_path instead.
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If you have for example ext4 on iscsi devices it is possible to setup
qoutas there. Unfortunately, because such fstab entry contains _netdev,
systemd will not add dependency to quotaon.service.
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Some systems abusively restrict mknod, even when the device node already
exists in /dev. This is unfortunate because it prevents systemd-nspawn
from creating the basic devices in /dev in the container.
This patch implements a workaround: when mknod fails, fallback on bind
mounts.
Additionally, /dev/console was created with a mknod with the same
major/minor as /dev/null before bind mounting a pts on it. This patch
removes the mknod and creates an empty regular file instead.
In order to test this patch, I used the following configuration, which I
think should replicate the system with the abusive restriction on mknod:
# grep devices /proc/self/cgroup
4:devices:/user.slice/restrict
# cat /sys/fs/cgroup/devices/user.slice/restrict/devices.list
c 1:9 r
c 5:2 rw
c 136:* rw
# systemd-nspawn --register=false -D .
v2:
- remove "bind", it is not needed since there is already MS_BIND
v3:
- fix error management when calling touch()
- fix lowercase in error message
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We have no such check in any of the other tools, hence don't have one in
nspawn either.
(This should make things nicer for Rocket, among other things)
Note: removing this check does not mean that we support running nspawn
on non-systemd. We explicitly don't. It just means that we remove the
check for running it like that. You are still on your own if you do...
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Try to keep syscalls as minimal as possible.
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QEMU/KVM guests do not have hypervisor nodes, but they do have
fw-cfg nodes (since qemu v2.3.0-rc0). fw-cfg nodes are documented,
see kernel doc Documentation/devicetree/bindings/arm/fw-cfg.txt,
and therefore we should be able to rely on it in this detection.
Unfortunately, we currently don't have enough information in the
DT, or elsewhere, to determine if we're using KVM acceleration
with QEMU or not, so we can only report 'qemu' at this time, even
if KVM is in use. This shouldn't really matter in practice though,
because if detect-virt is used interactively it will be clear to
the user whether or not KVM acceleration is present by the overall
speed of the guest. If used by a script, then the script's behavior
should not change whether it's 'qemu' or 'kvm'. QEMU emulated
guests and QEMU/KVM guests of the same type should behave
identically, only the speed at which they run should differ.
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Kernel doc Documentation/ABI/testing/sysfs-firmware-ofw says that
the /proc/device-tree symlink should be used, as opposed to
directly accessing /sys/firmware/devicetree/base. The former is
ABI, but not the later.
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Entropy Graph code doesn't handle the error condition if open() of /proc entry
fails. Moreover, the file is only opened once and only first sample will contain
the correct value because the return value of pread() is also not handled
properly and file is not re-opened. Fix both problems.
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Correctly handle the potential failure of fdopen() (because of OOM, for instance)
after potentially successful open(). Prevent leaking open fd in such case.
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If the kernel has no CONFIG_SCHED_DEBUG option set, systemd-bootchart produces
empty .svg file. The reason for this is very fragile file descriptor logic in
log_sample() and main() (/* do some cleanup, close fd's */ block). There are
many places where file descriptors are closed on failure (missing SCHED_DEBUG
provokes it), but there are several problems with it:
- following iterations in the loop see that the descriptor is non zero and do
not open the corresponding file again;
- "some cleanup" code closes already closed files and the descriptors are reused
already, in particular for resulting .svg file;
- static "vmstat" and "schedstat" variables in log_sample() made the situation
even worse.
These are the strace fragments:
[...]
close(7) = -1 EBADF (Bad file descriptor)
close(-1) = -1 EBADF (Bad file descriptor)
pread(7, 0xbea60a2c, 4095, 0) = -1 EBADF (Bad file descriptor)
close(7) = -1 EBADF (Bad file descriptor)
close(-1) = -1 EBADF (Bad file descriptor)
pread(7, 0xbea60a2c, 4095, 0) = -1 EBADF (Bad file descriptor)
close(7) = -1 EBADF (Bad file descriptor)
close(-1) = -1 EBADF (Bad file descriptor)
getdents64(4, /* 0 entries */, 32768) = 0
clock_gettime(CLOCK_MONOTONIC, {24, 783843501}) = 0
nanosleep({0, 5221792}, NULL) = 0
clock_gettime(CLOCK_MONOTONIC, {24, 789726835}) = 0
lseek(4, 0, SEEK_SET) = 0
pread(5, "nr_free_pages 52309\nnr_alloc_bat"..., 4095, 0) = 685
pread(6, "version 15\ntimestamp 4294939775\n"..., 4095, 0) = 86
getdents64(4, /* 99 entries */, 32768) = 2680
pread(7, 0xbea60a2c, 4095, 0) = -1 EBADF (Bad file descriptor)
close(7) = -1 EBADF (Bad file descriptor)
close(-1) = -1 EBADF (Bad file descriptor)
pread(8, 0xbea60a2c, 4095, 0) = -1 EBADF (Bad file descriptor)
close(8) = -1 EBADF (Bad file descriptor)
close(-1) = -1 EBADF (Bad file descriptor)
pread(9, 0xbea60a2c, 4095, 0) = -1 EBADF (Bad file descriptor)
close(9) = -1 EBADF (Bad file descriptor)
[...]
where it obviously tries to close same and reused decriptors many times, also
passing return code "-1" instead of descriptor...
[...]
close(7) = -1 EBADF (Bad file descriptor)
close(-1) = -1 EBADF (Bad file descriptor)
pipe2([7, 8], O_CLOEXEC) = 0
clone(child_stack=0, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0xb6fd0068) = 192
close(8) = 0
fcntl64(7, F_SETFD, 0) = 0
fstat64(7, {st_mode=S_IFIFO|0600, st_size=0, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb6fd2000
read(7, "[ 0.074507] calling vfp_init"..., 4096) = 4096
[...]
read(7, "s)\n[ 6.228910] UBIFS: reserve"..., 4096) = 4096
read(7, "trary Executable File Formats Fi"..., 4096) = 1616
read(7, "", 4096) = 0
close(7) = 0
wait4(192, [{WIFEXITED(s) && WEXITSTATUS(s) == 0}], 0, NULL) = 192
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also removes this warning:
src/udev/cdrom_id/cdrom_id.c: In function ‘cd_media_info.isra.13’:
src/udev/cdrom_id/cdrom_id.c:612:12: warning: assuming signed overflow
does not occur when assuming that (X + c) >= X is always true
[-Wstrict-overflow]
static int cd_media_info(struct udev *udev, int fd)
^
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