dup(2): document the handling of filedescriptor flags
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Authored by kib on Mar 28 2026, 8:53 AM.

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rG6cc99baea607: dup(2): document the handling of filedescriptor flags

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kib created this revision.Mar 28 2026, 8:53 AM

Herald added subscribers: ziaee, imp. · View Herald TranscriptMar 28 2026, 8:53 AM

kib requested review of this revision.Mar 28 2026, 8:53 AM

markj added inline comments.Mar 28 2026, 8:58 AM

lib/libc/gen/dup3.3
55	In fact it is unconditionally preserved, kern_dup() does newfde->fde_flags = (oldfde->fde_flags & ~(UF_EXCLOSE \| UF_FOCLOSE)) \| fddup_to_fde_flags(flags);
lib/libsys/dup.2
85	The resolve-beneath flag is preserved.

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markj accepted this revision.Mar 28 2026, 9:08 AM

This revision is now accepted and ready to land.Mar 28 2026, 9:08 AM

Closed by commit rG6cc99baea607: dup(2): document the handling of filedescriptor flags (authored by kib). · Explain WhyMar 28 2026, 9:09 AM

This revision was automatically updated to reflect the committed changes.

kib added a commit: rG6cc99baea607: dup(2): document the handling of filedescriptor flags.

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lib/

libc/

gen/

dup3.3

2 lines

libsys/

dup.2

5 lines

Diff 174429

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lib/libc/gen/dup3.3