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This part of the copyright blurb stems from the GPL use recommendations:
https://www.gnu.org/licenses/gpl-howto.en.html
The concept appears to originate in times where version control was per
file, instead of per tree, and was a way to glue the files together.
Ultimately, we nowadays don't live in that world anymore, and this
information is entirely useless anyway, as people are very welcome to
copy these files into any projects they like, and they shouldn't have to
change bits that are part of our copyright header for that.
hence, let's just get rid of this old cruft, and shorten our codebase a
bit.
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The boot id is stored twice, and different code paths use either one or the
other. So we need to store it both in the header and as a field for full
compatibility.
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The parser never accepted "__"-prefixed fields in binary format, but there was
a comment questioning this decision. Let's make it official, and remove the
comment.
Also, for clarity, let's move the dunder field parsing after the field
verification check. This doesn't change much, because invalid fields cannot be
known special fields, but is seems cleaner to first verify the validity of the
name, and then check if it is one of the known ones.
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$ build-asan/fuzz-journal-remote test/fuzz-regressions/fuzz-journal-remote/crash-96dee870ea66d03e89ac321eee28ea63a9b9aa45
...
Ignoring invalid field: "S\020"
Ignoring invalid field: "S\020"
...
If the field name includes nul bytes, we won't print all of the name.
But that seems enough of a corner case to ignore.
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We shouldn't just log arbitrary stuff, in particular newlines and control chars
Now:
Unknown dunder line __CURSORFACILITY=6\nSYSLOG_IDENTIFIER=/USR/SBIN/CRON\nMES…, ignoring.
Unknown dunder line __REALTIME_TIME[TAMP=1404101101501874\n__MONOTONIC_TIMEST…, ignoring.
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The type of cescape_char() is changed to int to make it easier to use
in "%.*s". We know the value is between 1 and 4, so size_t is overkill.
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We would accept any value, and then journal_file_check_object() would reject
the whole entry. Let's just ignore the field.
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Files which are installed as-is (any .service and other unit files, .conf
files, .policy files, etc), are left as is. My assumption is that SPDX
identifiers are not yet that well known, so it's better to retain the
extended header to avoid any doubt.
I also kept any copyright lines. We can probably remove them, but it'd nice to
obtain explicit acks from all involved authors before doing that.
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log.h really should only include the bare minimum of other headers, as
it is really pulled into pretty much everything else and already in
itself one of the most basic pieces of code we have.
Let's hence drop inclusion of:
1. sd-id128.h because it's entirely unneeded in current log.h
2. errno.h, dito.
3. sys/signalfd.h which we can replace by a simple struct forward
declaration
4. process-util.h which was needed for getpid_cached() which we now hide
in a funciton log_emergency_level() instead, which nicely abstracts
the details away.
5. sys/socket.h which was needed for struct iovec, but a simple struct
forward declaration suffices for that too.
Ultimately this actually makes our source tree larger (since users of
the functionality above must now include it themselves, log.h won't do
that for them), but I think it helps to untangle our web of includes a
tiny bit.
(Background: I'd like to isolate the generic bits of src/basic/ enough
so that we can do a git submodule import into casync for it)
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Our CODING_STYLE suggests not comparing with NULL, but relying on C's
downgrade-to-bool feature for that. Fix up some code to match these
guidelines. (This is not comprehensive, the coccinelle output for this
is unfortunately kinda borked)
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This follows what the kernel is doing, c.f.
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=5fd54ace4721fc5ce2bb5aef6318fcf17f421460.
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In addition to the changes from #6933 this handles cases that could be
matched with the included cocci file.
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This adds IOVEC_INIT() and IOVEC_MAKE() for initializing iovec structures
from a pointer and a size. On top of these IOVEC_INIT_STRING() and
IOVEC_MAKE_STRING() are added which take a string and automatically
determine the size of the string using strlen().
This patch removes the old IOVEC_SET_STRING() macro, given that
IOVEC_MAKE_STRING() is now useful for similar purposes. Note that the
old IOVEC_SET_STRING() invocations were two characters shorter than the
new ones using IOVEC_MAKE_STRING(), but I think the new syntax is more
readable and more generic as it simply resolves to a C99 literal
structure initialization. Moreover, we can use very similar syntax now
for initializing strings and pointer+size iovec entries. We canalso use
the new macros to initialize function parameters on-the-fly or array
definitions. And given that we shouldn't have so many ways to do the
same stuff, let's just settle on the new macros.
(This also converts some code to use _cleanup_ where dynamically
allocated strings were using IOVEC_SET_STRING() before, to modernize
things a bit)
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We'd fail with an assert in journal_importer_process_data(),
because that function requires the caller to handle EOF themselves.
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No functional change.
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