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fix(platform): small robustness gaps in openDirectoryInFileManager and the Mongo TLS temp key (#1768) - #1789
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…t create the directory; the Mongo TLS temp key is 0600 before it is written and a running instance's temp directory is kept (#1768)
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Closes #1768.
openDirectoryInFileManagerreturnsfalsewhen creating the directory fails, as its contract says.resolveMongoTlsCertificateKeyFile: the file is created empty andchmod 600before the key is written; any failure removes the temp directory (it was left behind when the write threw).querya_mongo_tls_<pid>_...;cleanupStaleMongoTlsTempFileskeeps the directories of processes that are still running (kill -0/tasklist), so a second instance's start no longer deletes the first one's certificate file. Directories without a pid (older versions) and ones of dead processes are removed as before.