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CODING_STYLE: elaborate on O_CLOEXEC a bit
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@ -195,4 +195,10 @@
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- When you allocate a file descriptor, it should be made O_CLOEXEC
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right from the beginning, as none of our files should leak to forked
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binaries by default. Hence, whenever you open a file, O_CLOEXEC must
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be specified, right from the beginning.
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be specified, right from the beginning. This also applies to
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sockets. Effectively this means that all invocations to:
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a) open() must get O_CLOEXEC passed
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b) socket() and socketpair() must get SOCK_CLOEXEC passed
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c) recvmsg() must get MSG_CMSG_CLOEXEC set
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d) F_DUPFD_CLOEXEC should be used instead of F_DUPFD, and so on
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