Unit Instance

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        "This infrastructure is necessary to avoid races when opening files outside the working directory. Imagine that a process consists of two threads, thread A and thread B. Thread A issues <literal>open(./tmp/foo/bah., flags, mode)</literal> and before returning it gets preempted and thread B runs. Thread B does not care about the needs of thread A and renames or removes <filename>/tmp/foo/</filename>. We got a race. To avoid this we can open <filename>/tmp/foo</filename> and use it as <varname>dirfd</varname> for <function>openat</function> syscall. This also enables user to implement per-thread working directories."
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    "target": [
        "Esta infra-estrutura é necessária para evitar corridas ao abrir arquivos fora do diretório de trabalho. Imagine que um processo consiste em duas threads, thread A e thread B. Thread A emite <literal>open (./tmp/foo/bah., Flags, mode)</literal> e antes de retornar ele se antecipa e a thread B é executada. A thread B não se preocupa com as necessidades da thread A e renomeia ou remove o <filename>/tmp/foo/</filename>. Nós temos uma corrida. Para evitar isso, podemos abrir o <filename>/tmp/foo</filename> e usá-lo como <varname>dirfd</varname> para a syscall <function>openat</function>. Isso também permite que o usuário implemente diretórios de trabalho por thread."
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    "note": "(itstool) path: sect3/para",
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    "source_unit": "https://translate-dev.freebsd.org/api/units/157267/?format=api",
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    "id": 157284,
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    "timestamp": "2020-04-18T18:14:55.927041Z"
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