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proc.5: Document /proc/PID/seccomp 

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
This commit is contained in:
Michael Kerrisk 2016-10-07 10:50:10 +02:00
parent 3ed7270ea2
commit 15869389bf
1 changed files with 24 additions and 0 deletions
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@ -1569,6 +1569,30 @@ check; see
.\" FIXME Describe /proc/[pid]/seccomp
.\" Added in 2.6.12
.\"
.TP
.IR /proc/[pid]/seccomp " (Linux 2.6.12 to 2.6.22)"
This file can be used to read and change the process's
secure computing (seccomp) mode setting.
It contains the value 0 if the process is not in seccomp mode,
and 1 if the process is in strict seccomp mode (see
.BR seccomp (2)).
Writing 1 to this file places the process irreversibly in strict seccomp mode.
(Further attempts to write to the file fail with the
.B EPERM
error.)
In Linux 2.6.23,
this file went away, to be replaced by the
.BR prctl (2)
.BR PR_GET_SECCOMP
and
.BR PR_SET_SECCOMP
operations (and later by
.BR seccomp (2)
and the
.I Seccomp
field in
.IR /proc/[pid]/status ).
.\" FIXME Describe /proc/[pid]/sessionid
.\" Added in 2.6.25; read-only; only readable by real UID
.\" commit 1e0bd7550ea9cf474b1ad4c6ff5729a507f75fdc