From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 017B0C10F0E for ; Tue, 9 Apr 2019 19:17:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C3DE02084F for ; Tue, 9 Apr 2019 19:17:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726861AbfDITRx (ORCPT ); Tue, 9 Apr 2019 15:17:53 -0400 Received: from mx1.redhat.com ([209.132.183.28]:53598 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726523AbfDITRt (ORCPT ); Tue, 9 Apr 2019 15:17:49 -0400 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 28F37307D960; Tue, 9 Apr 2019 19:17:49 +0000 (UTC) Received: from madcap2.tricolour.ca (ovpn-112-16.phx2.redhat.com [10.3.112.16]) by smtp.corp.redhat.com (Postfix) with ESMTP id 2D2D45C666; Tue, 9 Apr 2019 19:17:42 +0000 (UTC) From: Richard Guy Briggs To: containers@lists.linux-foundation.org, Linux-Audit Mailing List , LKML Cc: eparis@parisplace.org, Steve Grubb , omosnace@redhat.com, Paul Moore , nhorman@redhat.com, Richard Guy Briggs Subject: [PATCH ghau51/ghau40 v6 6/7] libaudit: add support to get the task audit container identifier Date: Tue, 9 Apr 2019 15:16:57 -0400 Message-Id: <1554837418-25278-7-git-send-email-rgb@redhat.com> In-Reply-To: <1554837418-25278-1-git-send-email-rgb@redhat.com> References: <1554837418-25278-1-git-send-email-rgb@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.48]); Tue, 09 Apr 2019 19:17:49 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add the audit_get_containerid() call analogous to audit_getloginuid() and audit_get_session() calls to get our own audit container identifier. This is intended as a debug patch, not to be upstreamed. Signed-off-by: Richard Guy Briggs --- docs/Makefile.am | 2 +- docs/audit_get_containerid.3 | 25 +++++++++++++++++++++++++ lib/libaudit.c | 29 +++++++++++++++++++++++++++++ lib/libaudit.h | 1 + 4 files changed, 56 insertions(+), 1 deletion(-) create mode 100644 docs/audit_get_containerid.3 diff --git a/docs/Makefile.am b/docs/Makefile.am index 8fb030c6e5e4..209789bb2051 100644 --- a/docs/Makefile.am +++ b/docs/Makefile.am @@ -28,7 +28,7 @@ man_MANS = audit_add_rule_data.3 audit_add_watch.3 auditctl.8 auditd.8 \ auditd.conf.5 auditd-plugins.5 \ audit_delete_rule_data.3 audit_detect_machine.3 \ audit_encode_nv_string.3 audit_getloginuid.3 \ -audit_get_reply.3 audit_get_session.3 \ +audit_get_reply.3 audit_get_session.3 audit_get_containerid.3 \ audit_log_acct_message.3 audit_log_user_avc_message.3 \ audit_log_user_command.3 audit_log_user_comm_message.3 \ audit_log_user_message.3 audit_log_semanage_message.3 \ diff --git a/docs/audit_get_containerid.3 b/docs/audit_get_containerid.3 new file mode 100644 index 000000000000..7d11b9fa747b --- /dev/null +++ b/docs/audit_get_containerid.3 @@ -0,0 +1,25 @@ +.TH "AUDIT_GET_CONTAINERID" "3" "Feb 2018" "Red Hat" "Linux Audit API" +.SH NAME +audit_get_containerid \- Get a program's container id value +.SH SYNOPSIS +.B #include +.sp +uin32_t audit_get_containerid(void); + +.SH DESCRIPTION +This function returns the task's audit container identifier attribute. + +.SH "RETURN VALUE" + +This function returns the audit container identifier value if it was set. It will return a \-1 if the audit container identifier is unset. However, since uint64_t is an unsigned type, you will see the converted value instead of \-1. + +.SH "ERRORS" + +This function returns \-2 on failure. Additionally, in the event of a real error, errno would be set. The function can set errno based on failures of open, read, or strtoul. + +.SH "SEE ALSO" + +.BR audit_getloginuid (3). + +.SH AUTHOR +Steve Grubb diff --git a/lib/libaudit.c b/lib/libaudit.c index 5df5ddf85430..a1727f1a321a 100644 --- a/lib/libaudit.c +++ b/lib/libaudit.c @@ -931,6 +931,35 @@ uint32_t audit_get_session(void) return ses; } +/* + * This function will retrieve the audit container identifier or -2 if + * there is an error. + */ +uint64_t audit_get_containerid(void) +{ + uint64_t containerid; + int len, in; + char buf[32]; + + errno = 0; + in = open("/proc/self/audit_containerid", O_NOFOLLOW|O_RDONLY); + if (in < 0) + return -2; + do { + len = read(in, buf, sizeof(buf)); + } while (len < 0 && errno == EINTR); + close(in); + if (len < 0 || len >= sizeof(buf)) + return -2; + buf[len] = 0; + errno = 0; + containerid = strtoull(buf, 0, 10); + if (errno) + return -2; + else + return containerid; +} + int audit_rule_syscall_data(struct audit_rule_data *rule, int scall) { int word = AUDIT_WORD(scall); diff --git a/lib/libaudit.h b/lib/libaudit.h index e7256a328c45..348b50b525be 100644 --- a/lib/libaudit.h +++ b/lib/libaudit.h @@ -575,6 +575,7 @@ extern int audit_get_reply(int fd, struct audit_reply *rep, reply_t block, extern uid_t audit_getloginuid(void); extern int audit_setloginuid(uid_t uid); extern uint32_t audit_get_session(void); +extern uint64_t audit_get_containerid(void); extern int audit_detect_machine(void); extern int audit_determine_machine(const char *arch); -- 1.8.3.1