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environ is already defined in unistd.h
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machine-id
If /etc was read only at boot time with an empty /etc/machine-id, the latter
will be mounted as a tmpfs and get reset at each boot. If the system becomes rw
later, this functionality enables to commit in a race-free manner the
transient machine-id to disk.
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https://bugs.debian/org/771397
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If the format string contains %m, clearly errno must have a meaningful
value, so we might as well use log_*_errno to have ERRNO= logged.
Using:
find . -name '*.[ch]' | xargs sed -r -i -e \
's/log_(debug|info|notice|warning|error|emergency)\((".*%m.*")/log_\1_errno(errno, \2/'
Plus some whitespace, linewrap, and indent adjustments.
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Using:
find . -name '*.[ch]' | while read f; do perl -i.mmm -e \
'local $/;
local $_=<>;
s/(if\s*\([^\n]+\))\s*{\n(\s*)(log_[a-z_]*_errno\(\s*([->a-zA-Z_]+)\s*,[^;]+);\s*return\s+\g4;\s+}/\1\n\2return \3;/msg;
print;'
$f
done
And a couple of manual whitespace fixups.
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It corrrectly handles both positive and negative errno values.
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As a followup to 086891e5c1 "log: add an "error" parameter to all
low-level logging calls and intrdouce log_error_errno() as log calls
that take error numbers", use sed to convert the simple cases to use
the new macros:
find . -name '*.[ch]' | xargs sed -r -i -e \
's/log_(debug|info|notice|warning|error|emergency)\("(.*)%s"(.*), strerror\(-([a-zA-Z_]+)\)\);/log_\1_errno(-\4, "\2%m"\3);/'
Multi-line log_*() invocations are not covered.
And we also should add log_unit_*_errno().
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On the contrary of env, the added function returns all characters
cescaped, because it improves reproducibility.
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/proc/[pid]/cwd and /proc/[pid]/root are symliks to corresponding
directories
The added functions returns values of that symlinks.
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This should make the unquoting scheme a bit less naive.
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Reads the basename of the target of a symlink.
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it static
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Also, make all parsing of the kernel cmdline non-fatal.
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needing entropy
Doesn't require an fd, and could be a bit faster, so let's make use of
it, if it is available.
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Reported-by: sztanpet on irc
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Function queries system hostname and applies changes only when necessary. Also,
migrate all client of sethostname to sethostname_idempotent while at it.
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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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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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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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It is redundant to store 'hash' and 'compare' function pointers in
struct Hashmap separately. The functions always comprise a pair.
Store a single pointer to struct hash_ops instead.
systemd keeps hundreds of hashmaps, so this saves a little bit of
memory.
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It was mostly a duplicate of free_and_strdup().
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Before forking, block all signals, and unblock them afterwards. This way
the child will have them blocked, and we won't lose them.
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This is a useful helper, make it global. It will be required for
libsystemd-terminal, at minimum.
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If we invoke agents, we should make sure we actually can kill them
again. I mean, it's probably not our job to cleanup the signals if our
tools are invoked in weird contexts, but at least we should make sure,
that the subprocesses we invoke and intend to control work as intended.
Also see:
http://lists.freedesktop.org/archives/systemd-devel/2014-August/022460.html
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handlers when one sigaction() fails
After all, we usually don't check for failures here, and it is better to
do as much as we can...
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When this system-wide start-up timeout is hit we execute one of the
failure actions already implemented for services that fail.
This should not only be useful on embedded devices, but also on laptops
which have the power-button reachable when the lid is closed. This
devices, when in a backpack might get powered on by accident due to the
easily reachable power button. We want to make sure that the system
turns itself off if it starts up due this after a while.
When the system manages to fully start-up logind will suspend the
machine by default if the lid is closed. However, in some cases we don't
even get as far as logind, and the boot hangs much earlier, for example
because we ask for a LUKS password that nobody ever enters.
Yeah, this is a real-life problem on my Yoga 13, which has one of those
easily accessible power buttons, even if the device is closed.
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for both validating domains and host names
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http://lists.freedesktop.org/archives/systemd-devel/2014-July/021591.html
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Fix should strictly follow the rule to return negative errno-style
error codes from functions, hence let's fix more "return -1"-style
lazinesses.
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