[PATCH] ptrace.2: copy retval info for SECCOMP_GET_FILTER to right section

[Jann Horn <jannh-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>]

The "RETURN VALUE" section made a claim that was incorrect for
PTRACE_SECCOMP_GET_FILTER. Explicitly describe the behavior of
PTRACE_SECCOMP_GET_FILTER in the "RETURN VALUE" section (as usual), but
leave the now duplicate description in the section describing
PTRACE_SECCOMP_GET_FILTER, since the PTRACE_SECCOMP_GET_FILTER section
would otherwise probably become harder to understand.

Signed-off-by: Jann Horn <jannh-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>
---
 man2/ptrace.2 | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/man2/ptrace.2 b/man2/ptrace.2
index e1c3eec46..d78b8db2d 100644
--- a/man2/ptrace.2
+++ b/man2/ptrace.2
@@ -2206,7 +2206,10 @@ the report is sent only once.
 On success, the
 .B PTRACE_PEEK*
 requests return the requested data (but see NOTES),
-while other requests return zero.
+the
+.B PTRACE_SECCOMP_GET_FILTER
+request returns the number of instructions in the BPF program, and
+other requests return zero.
 .PP
 On error, all requests return \-1, and
 .I errno
-- 
2.16.0.rc1.238.g530d649a79-goog

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