From c39a071e7c021f6ff3554aca2758e97b47a9777c Mon Sep 17 00:00:00 2001
From: Steve Grubb <sgrubb@redhat.com>
Date: Tue, 26 Feb 2019 18:33:33 -0500
Subject: [PATCH] Add substitue functions for strndupa & rawmemchr
(cherry picked from commit d579a08bb1cde71f939c13ac6b2261052ae9f77e)
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
---
auparse/auparse.c | 12 +++++++++++-
auparse/interpret.c | 9 ++++++++-
configure.ac | 14 +++++++++++++-
src/ausearch-lol.c | 12 +++++++++++-
4 files changed, 43 insertions(+), 4 deletions(-)
--- a/auparse/auparse.c
+++ b/auparse/auparse.c
@@ -1,5 +1,5 @@
/* auparse.c --
- * Copyright 2006-08,2012-17 Red Hat Inc., Durham, North Carolina.
+ * Copyright 2006-08,2012-19 Red Hat Inc., Durham, North Carolina.
* All Rights Reserved.
*
* This library is free software; you can redistribute it and/or
@@ -1118,6 +1118,16 @@ static int str2event(char *s, au_event_t
return 0;
}
+#ifndef HAVE_STRNDUPA
+static inline char *strndupa(const char *old, size_t n)
+{
+ size_t len = strnlen(old, n);
+ char *tmp = alloca(len + 1);
+ tmp[len] = 0;
+ return memcpy(tmp, old, len);
+}
+#endif
+
/* Returns 0 on success and 1 on error */
static int extract_timestamp(const char *b, au_event_t *e)
{
--- a/auparse/interpret.c
+++ b/auparse/interpret.c
@@ -853,6 +853,13 @@ err_out:
return print_escaped(id->val);
}
+// rawmemchr is faster. Let's use it if we have it.
+#ifdef HAVE_RAWMEMCHR
+#define STRCHR rawmemchr
+#else
+#define STRCHR strchr
+#endif
+
static const char *print_proctitle(const char *val)
{
char *out = (char *)print_escaped(val);
@@ -863,7 +870,7 @@ static const char *print_proctitle(const
// Proctitle has arguments separated by NUL bytes
// We need to write over the NUL bytes with a space
// so that we can see the arguments
- while ((ptr = rawmemchr(ptr, '\0'))) {
+ while ((ptr = STRCHR(ptr, '\0'))) {
if (ptr >= end)
break;
*ptr = ' ';
--- a/configure.ac
+++ b/configure.ac
@@ -1,7 +1,7 @@
dnl
define([AC_INIT_NOTICE],
[### Generated automatically using autoconf version] AC_ACVERSION [
-### Copyright 2005-18 Steve Grubb <sgrubb@redhat.com>
+### Copyright 2005-19 Steve Grubb <sgrubb@redhat.com>
###
### Permission is hereby granted, free of charge, to any person obtaining a
### copy of this software and associated documentation files (the "Software"),
@@ -72,6 +72,18 @@ dnl; posix_fallocate is used in audisp-r
AC_CHECK_FUNCS([posix_fallocate])
dnl; signalfd is needed for libev
AC_CHECK_FUNC([signalfd], [], [ AC_MSG_ERROR([The signalfd system call is necessary for auditd]) ])
+dnl; check if rawmemchr is available
+AC_CHECK_FUNCS([rawmemchr])
+dnl; check if strndupa is available
+AC_LINK_IFELSE(
+ [AC_LANG_SOURCE(
+ [[
+ #define _GNU_SOURCE
+ #include <string.h>
+ int main() { (void) strndupa("test", 10); return 0; }]])],
+ [AC_DEFINE(HAVE_STRNDUPA, 1, [Let us know if we have it or not])],
+ []
+)
ALLWARNS=""
ALLDEBUG="-g"
--- a/src/ausearch-lol.c
+++ b/src/ausearch-lol.c
@@ -1,6 +1,6 @@
/*
* ausearch-lol.c - linked list of linked lists library
-* Copyright (c) 2008,2010,2014,2016 Red Hat Inc., Durham, North Carolina.
+* Copyright (c) 2008,2010,2014,2016,2019 Red Hat Inc., Durham, North Carolina.
* All Rights Reserved.
*
* This software may be freely redistributed and/or modified under the
@@ -152,6 +152,16 @@ static int compare_event_time(event *e1,
return 0;
}
+#ifndef HAVE_STRNDUPA
+static inline char *strndupa(const char *old, size_t n)
+{
+ size_t len = strnlen(old, n);
+ char *tmp = alloca(len + 1);
+ tmp[len] = 0;
+ return memcpy(tmp, old, len);
+}
+#endif
+
/*
* This function will look at the line and pick out pieces of it.
*/