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Kernel+SystemServer: Don't hardcode coredump directory path

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Instead, allow userspace to decide on the coredump directory path. By
default, SystemServer sets it to the /tmp/coredump directory, but users
can now change this by writing a new path to the sysfs node at
/sys/kernel/variables/coredump_directory, and also to read this node to
check where coredumps are currently generated at.
This commit is contained in:
Liav A
2022-11-26 14:42:35 +02:00
committed by Andrew Kaster
parent 7dcf8f971b
commit 0bb7c8f4c4
10 changed files with 203 additions and 1 deletions
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11
Kernel/Process.cpp
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@@ -696,7 +696,16 @@ ErrorOr<void> Process::dump_core()
VERIFY(is_dumpable());
VERIFY(should_generate_coredump());
dbgln("Generating coredump for pid: {}", pid().value());
auto coredump_path = TRY(KString::formatted("/tmp/coredump/{}_{}_{}", name(), pid().value(), kgettimeofday().to_truncated_seconds()));
auto coredump_directory_path = TRY(Coredump::directory_path().with([&](auto& coredump_directory_path) -> ErrorOr<NonnullOwnPtr<KString>> {
if (coredump_directory_path)
return KString::try_create(coredump_directory_path->view());
return KString::try_create(""sv);
}));
if (coredump_directory_path->view() == ""sv) {
dbgln("Generating coredump for pid {} failed because coredump directory was not set.", pid().value());
return {};
}
auto coredump_path = TRY(KString::formatted("{}/{}_{}_{}", coredump_directory_path->view(), name(), pid().value(), kgettimeofday().to_truncated_seconds()));
auto coredump = TRY(Coredump::try_create(*this, coredump_path->view()));
return coredump->write();
}