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unix.7: Clarify that SO_PASSCRED behavior 

Clarify that SO_PASSCRED results in SCM_CREDENTIALS data in each
subsequently received message.

See https://bugzilla.kernel.org/show_bug.cgi?id=201805

Reported-by: Felipe Gasper <felipe@felipegasper.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
This commit is contained in:
Michael Kerrisk 2018-12-23 18:55:33 +01:00
parent 3d3cddde94
commit 421d34c632
1 changed files with 10 additions and 4 deletions
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man7/unix.7
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@ -280,10 +280,16 @@ by specifying
as the socket family.
.TP
.B SO_PASSCRED
This socket option enables receipt
of the credentials of the sending process in an
.BR SCM_CREDENTIALS
ancillary message.
This socket option enables receipt of the credentials of
the sending process in an
.B SCM_CREDENTIALS ancillary
message in each subsequently message.
The returned credentials are those specified by the sender using
.BR SCM_CREDENTIALS ,
or a default that includes the sender's PID, real user ID, and real group ID,
if the sender did not specify
.B SCM_CREDENTIALS
ancillary data.
.IP
When this option is set and the socket is not yet connected,
a unique name in the abstract namespace will be generated automatically.