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Fixes:
-bash-4.3# echo core >/proc/sys/kernel/core_pattern
-bash-4.3# kill -ABRT 1
-bash-4.3# kill -ABRT 1
[ 61.373922] systemd[1]: segfault at 7fff1d0a8f48 ip 00007fc9ca91b1c3 sp 00007fff1d0a8f50 error 6 in libc-2.23.so[7fc9ca8ce000+1c0000]
[ 61.768017] Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000008b
[ 61.768017]
...
Recursive ABRT and segfault:
PID 1 - core
TID 1:
...
#153905 0x00005575fc3f829d log_dispatch
#153906 0x00005575fc3f8aa3 log_assert
#153907 0x00005575fc3f8ae9 log_assert_failed
#153908 0x00005575fc3e7eb1 safe_close
#153909 0x00005575fc3f6d5e log_close_journal
#153910 0x00005575fc3f829d log_dispatch
#153911 0x00005575fc3f85a1 log_internalv
#153912 0x00005575fc3f86a1 log_internal
#153913 0x00005575fc31c4c1 crash
#153914 0x00007fb26f2cf3d0 __restore_rt
#153915 0x00007fb26f2ced00 pause
#153916 0x00005575fc403944 freeze
#153917 0x00005575fc31bf7b freeze_or_reboot
...
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Let's make sigkill_wait() take a normal pid_t, and add sigkill_waitp() that
takes a pointer (which is useful for usage in _cleanup_), following the usual
logic we have for this.
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This adds a new GetProcesses() bus call to the Unit object which returns an
array consisting of all PIDs, their process names, as well as their full cgroup
paths. This is then used by "systemctl status" to show the per-unit process
tree.
This has the benefit that the client-side no longer needs to access the
cgroupfs directly to show the process tree of a unit. Instead, it now uses this
new API, which means it also works if -H or -M are used correctly, as the
information from the specific host is used, and not the one from the local
system.
Fixes: #2945
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We have this ids, hence let's use them universally.
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This is a cosmetic best-effort thing anyway.
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rootfs as PID1
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Inspired by https://github.com/systemd/systemd/issues/2187#issuecomment-165587140
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My previous patch to only include what we use accidentially placed
the added inlcudes in non-sorted order.
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This is a cleaned up result of running iwyu but without forward
declarations on src/basic.
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In order to match the other get_process_xyz() calls.
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The prototype was moved long ago, actually move the definition over now,
too.
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There are more than enough to deserve their own .c file, hence move them
over.
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string-util.[ch]
There are more than enough calls doing string manipulations to deserve
its own files, hence do something about it.
This patch also sorts the #include blocks of all files that needed to be
updated, according to the sorting suggestions from CODING_STYLE. Since
pretty much every file needs our string manipulation functions this
effectively means that most files have sorted #include blocks now.
Also touches a few unrelated include files.
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This really deserves its own file, given how much code this is now.
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All users of get_status_field() expect the field pattern to occur in
the beginning of a line, and the delimiter is ':'.
Hardcode this into the function, and also skip any whitespace before ':'
to support fields in files like /proc/cpuinfo. Add support for returning
the full field value (currently stops on first whitespace).
Rename the function so it's easier to ensure all callers switch to new
semantics.
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An empty env block is completely valid, hence return it as such, and
don't turn it into an error.
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so far, when we read something from /proc/$PID we would pass on the
ENOENT from the kernel as error, if the process was missing. With this
change we systematically convert this to ESRCH, which is the more
appropriate error code, and what all the other glibc/syscalls like
kill() use.
All code that calls these functions should be fine with this change. In
fact, one invocation of get_process_exe() in bus-creds.c already assumed
ESRCH would be returned if a process is missing, and this assumption is
now validated after the change.
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basic/ can be used by everything
cannot use anything outside of basic/
libsystemd/ can use basic/
cannot use shared/
shared/ can use libsystemd/
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