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unix.7: The PID sent with SCM_CREDENTIALS must match an existing process 

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
This commit is contained in:
Michael Kerrisk 2020-02-05 12:51:51 +01:00
parent e4c98f64d1
commit 863d6b7de0
1 changed files with 7 additions and 1 deletions
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8
man7/unix.7
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@ -503,7 +503,8 @@ of this structure.
The credentials which the sender specifies are checked by the kernel. The credentials which the sender specifies are checked by the kernel.
A privileged process is allowed to specify values that do not match its own. A privileged process is allowed to specify values that do not match its own.
The sender must specify its own process ID (unless it has the capability The sender must specify its own process ID (unless it has the capability
.BR CAP_SYS_ADMIN ), .BR CAP_SYS_ADMIN ,
in which case the PID of any existing process may be specified),
its real user ID, effective user ID, or saved set-user-ID (unless it has its real user ID, effective user ID, or saved set-user-ID (unless it has
.BR CAP_SETUID ), .BR CAP_SETUID ),
and its real group ID, effective group ID, or saved set-group-ID and its real group ID, effective group ID, or saved set-group-ID
@ -720,6 +721,11 @@ versus
.B ESOCKTNOSUPPORT .B ESOCKTNOSUPPORT
Unknown socket type. Unknown socket type.
.TP .TP
.B ESRCH
While sending an ancillary message containing credentials
.RB ( SCM_CREDENTIALS ),
the caller specified a PID that does not match any existing process.
.TP
.B ETOOMANYREFS .B ETOOMANYREFS
This error can occur for This error can occur for
.BR sendmsg (2) .BR sendmsg (2)