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A comment on Hacking the OS X Kernel for Fun and Profiles. Parent comment

Re:Hacking the OS X Kernel for Fun and Profiles by bdash on Tuesday August 13, 2013 @04:33PM (#6208089)
OS X provides the POSIX_SPAWN_CLOEXEC_DEFAULT flag to posix_spawn, which results in it automatically closing all file descriptors that aren't described by the file actions passed to posix_spawn.
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