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string_is_safe()
After all, we know have this as generic validator, so let's be correct
and use it wherver applicable.
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We can simplify our code quite a bit if we explicitly check for the
ifindex being 1 on Linux as a loopback check. Apparently, this is
hardcoded on Linux on the kernel, and effectively exported to userspace
via rtnl and such, hence we should be able to rely on it.
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This could overflow on 32bit, where size_t is the same as unsigned.
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https://bugs.freedesktop.org/show_bug.cgi?id=76745
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- mkdir_p_prefix: It has never been used
- mkdir_parents_prefix_label: Unused since 1434ae6fd49f8377b0ddbd4c675736e0d3226ea6
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Leaving the old root around seems better than aborting the
switch.
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It was only used in readahead.
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Before returning from function we should reset ret to NULL, thus cleanup
function is nop.
Also context_str() returns pointer to a string containing context but not a
copy, hence we must make copy it explicitly.
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We could end with a double close if we close the fd loop and flush_fd
fails. That would make us goto fail and there we close the fd once
again. This patch sets the fd to the return value for safe_close: -1
A fd with negative value will be ignored by the next call to
safe_close.
CID#996223
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Also, let's try to make function names descriptive, instead of using
bools for flags.
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linux/memfd.h was added linux 3.17, so it might not be widely
available for a while.
Also, check if memfd_create is defined, for the HAVE_LINUX_MEMFD_H
check to have a chance of succeeding.
Also, collapse all ifdefs for memfd-related stuff, because they
were all added together so there's no need to check separately.
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Programs such as OpenVPN may use ask-password for not only retrieving
passwords, but also usernames. Masking usernames with * seems just silly.
v2 - Don't mess with termios flags, instead print the input
instead of an asterix. Resolves issues with backspace
and TAB input.
v3 - Renamed 'do_echo' variables and argument to 'echo'. Also
modified the ask_password_{tty,agent,auto} API instead of
additional wrapper functions.
[zj: undo changes to ask_password_auto, since no callers were using
the new argument.]
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As it turns out, I can actually send data to the pty faster than the
terminal can read. Therefore, make sure we read as much data as possible
but bail out early enough to not cause starvation.
Kernel TTY buffers are 4k, so reduce the overall buffer size, but read
more than once if possible (up to 8 times sounds reasonable).
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The status of actually writing the file was totally ignored.
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The --utc option was introduced by commit
9fd290443f5f99fca0dcd4216b1de70f7d3b8db1.
Howerver, the implementation was incomplete.
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Fixup for 718880ba0d 'add a transient user unit directory'.
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This makes this function name similar to user_config_home() and makes
it match the name of the environment variable.
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This patch adds a transient user unit directory under
`$XDG_RUNTIME_DIR/systemd/user/` and stores transient user-instance
units (such as those created by `systemd-run --user`) under there
instead of putting them in $XDG_CONFIG_HOME/systemd/user/.
Fixes https://bugs.freedesktop.org/show_bug.cgi?id=67331
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Introduce option to display time in UTC.
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We cannot rely on "errno" to be non-zero on failure, if we perform
multiple glibc calls. That is, if the first eventfd() call fails, but the
second succeeds, we cleanup the barrier but return 0.
Fix this by always testing the return value immediately. This should also
fix all the coverity warnings.
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In pty.c there was both an include of our pty.h and the system installed pty.h.
The latter contains only two functions openpty and forkpty. We use neither so
I assume it was a typo and removed it. We still compile and pass all tests.
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Change the other spot too.
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Suggested by Zbigniew.
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Make it clear in the code that ignoring a failed safe_ato?() is intentional.
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systemctl would print 'CPUQuotaPerSecUSec=(null)' for no limit. This
does not look right.
Since USEC_INFINITY is one of the valid values, format_timespan()
could return NULL, and we should wrap every use of it in strna() or
similar. But most callers didn't do that, and it seems more robust to
return a string ("infinity") that makes sense most of the time, even
if in some places the result will not be grammatically correct.
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This adds --disable-utmp option to configure. If it is used, all
utmp-related functionality, including querying runlevel support,
is removed.
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We replace the idiom "X && !(*foo = 0)" with "X && ((*foo = 0), true)".
This is not a functional change, but should hopefully make it less
likely that people and static analyzers believe there is a typo here
(i.e., to make it clear that the intention was not "X && *foo != 0").
Thanks to David Herrmann for the suggestion.
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This commit introduces possibility to call parse_env_file_internal() and hand
over extra argument where we will accumulate how many items were successfully
parsed and pushed by callback. We make use of this in parse_env_file() and
return number of parsed items on success instead of always returning zero.
As a side-effect this commit should fix bug that locale settings in
/etc/locale.conf are not overriden by options passed via kernel command line.
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src/shared/label.c:255:15: warning: unused variable 'l' [-Wunused-variable]
char *l = NULL;
^
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Lets not unnecessarily rely on __WORDSIZE, which is not clearly specified
by any spec. Use explicit size comparisons if we're not interested in the
WORDSIZE, anyway.
(David: adjust commit message to explain why we do this)
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The alloca_align() helper is the alloca() equivalent of posix_memalign().
As there is no such function provided by glibc, we simply account for
additional memory and return a pointer offset into the allocated memory to
grant the alignment.
Furthermore, alloca0_align() is added, which simply clears the allocated
memory.
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This makes possible to spawn service instances triggered by socket with
MLS/MCS SELinux labels which are created based on information provided by
connected peer.
Implementation of label_get_child_mls_label derived from xinetd.
Reviewed-by: Paul Moore <pmoore@redhat.com>
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Also modernize a few other things and add comments to explain CID #1237503
and CID #1237504.
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TIOCSIG is linux specific, so include the linux ioctl header to make sure
it's defined. We currently rely on some rather non-obvious recursive
includes. Make sure its always defined regardless of the system headers.
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Found by Coverity. Fixes CID #1237746.
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Check memory allocation. Found by Coverity.
Fixes CID #1237644.
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We only break out of the previous loop if fd >= 0 so there is no
use in checking it again.
Found by coverity. Fixes: CID#1237577
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The recently allocated "printed" is not freed on error path.
Found by coverity. Fixes: CID#1237745
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When hashmap_replace detects no such key exists yet, it calls hashmap_put that
performs the same check again. Avoid that by splitting the core of hashmap_put
into a separate function.
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