nss/tst-nss-files-hosts-long.c

BZ #21915]
When the /etc/hosts file has a line longer than 1028
characters getent ahostsv4 and ahostsv6 will fail.

This test performs a getent call on a /etc/hosts file that contains a
very long line (greater than 1028) using the test-in-container
framework.

Testing:
Confirmed that the test passes with the current (fixed) sources
on x86_64. Also confirmed that the test fails with a source tree that
does not have BZ 21915 applied, again on x86_64. Testing was carried
out on a RHEL7 system.

Patsy,

Thanks for the new test! I like to see new tests like this which make
use of test-in-container to simplify the boilerplate, and cover one of
the bugs by running built binaries. Lots of good coverage here. Thanks.

> BZ #21915]
> When the /etc/hosts file has a line longer than 1028
> characters getent ahostsv4 and ahostsv6 will fail.
> 
> This test performs a getent call on a /etc/hosts file that contains a
> very long line (greater than 1028) using the test-in-container
> framework.
> 
> Testing:
> Confirmed that the test passes with the current (fixed) sources
> on x86_64. Also confirmed that the test fails with a source tree that
> does not have BZ 21915 applied, again on x86_64. Testing was carried
> out on a RHEL7 system.

Perfect. Thanks for doing A/B testing on x86_64.

OK for master with ChangeLog date fixed and comment spacing and style fixed up.

Feel free to post v2 or just commit with the changes.

Reviewed-by: Carlos O'Donell <carlos@redhat.com>

> 0001-nss-Add-tst-nss-files-hosts-long-test-BZ-21915.patch
> 
> From 475a5dd17d1fa1c36f661ee20c9d59ba4a6a0140 Mon Sep 17 00:00:00 2001
> From: Patsy Franklin <pfrankli@redhat.com>
> Date: Wed, 30 Jan 2019 18:49:27 -0500
> Subject: [PATCH] nss: Add tst-nss-files-hosts-long test [BZ #21915]
> 
> When the /etc/hosts file has a line longer than 1028
> characters getent ahostsv4 and ahostsv6 will fail.
> 
> This test performs a getent call on a /etc/hosts file that contains
> a very long line (greater than 1028) using the test-in-container
> framework.

OK. Thanks, commit message looks good to me.

> ---
>  ChangeLog                                   |  9 +++++
>  nss/Makefile                                |  3 +-
>  nss/tst-nss-files-hosts-long.c              | 45 +++++++++++++++++++++
>  nss/tst-nss-files-hosts-long.root/etc/hosts | 11 +++++
>  4 files changed, 67 insertions(+), 1 deletion(-)
>  create mode 100644 nss/tst-nss-files-hosts-long.c
>  create mode 100644 nss/tst-nss-files-hosts-long.root/etc/hosts
> 
> diff --git a/ChangeLog b/ChangeLog
> index 23c20066a4..cd2d9a898e 100644
> --- a/ChangeLog
> +++ b/ChangeLog
> @@ -1,3 +1,12 @@
> +2019-01-30  Patsy Griffin Franklin  <pfrankli@redhat.com>

Refresh date to: 2019-02-04

> +
> +	[BZ #21915]
> +	* nss/Makefile (test-container): Add tst-nss-files-hosts-long.
> +	* nss/tst-nss-files-hosts-long.c: New file.
> +	* nss/tst-nss-files-hosts-long.root: New directory.
> +	* nss/tst-nss-files-hosts-long.root/etc: Likewise.
> +	* nss/tst-nss-files-hosts-long.root/etc/hosts: New file.
> +
>  2019-01-25  Siddhesh Poyarekar  <siddhesh@sourceware.org>
>  
>  	* po/be.po: Update translations.
> diff --git a/nss/Makefile b/nss/Makefile
> index 0fa28f0c5e..85bee87f78 100644
> --- a/nss/Makefile
> +++ b/nss/Makefile
> @@ -60,7 +60,8 @@ tests			= test-netdb test-digits-dots tst-nss-getpwent bug17079 \
>  xtests			= bug-erange
>  
>  tests-container = \
> -			  tst-nss-test3
> +			  tst-nss-test3 \
> +			  tst-nss-files-hosts-long

OK.

>  
>  # Tests which need libdl
>  ifeq (yes,$(build-shared))
> diff --git a/nss/tst-nss-files-hosts-long.c b/nss/tst-nss-files-hosts-long.c
> new file mode 100644
> index 0000000000..693d4b7ca0
> --- /dev/null
> +++ b/nss/tst-nss-files-hosts-long.c
> @@ -0,0 +1,45 @@
> +/* Test getent doesn't fail with long /etc/hosts lines (Bug 21915).

OK.

> +   Copyright (C) 2019 Free Software Foundation, Inc.

OK.

> +   This file is part of the GNU C Library.
> +
> +   The GNU C Library is free software; you can redistribute it and/or
> +   modify it under the terms of the GNU Lesser General Public License as
> +   published by the Free Software Foundation; either version 2.1 of the
> +   License, or (at your option) any later version.
> +
> +   The GNU C Library is distributed in the hope that it will be useful,
> +   but WITHOUT ANY WARRANTY; without even the implied warranty of
> +   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
> +   Lesser General Public License for more details.
> +
> +   You should have received a copy of the GNU Lesser General Public
> +   License along with the GNU C Library; see the file COPYING.LIB.  If
> +   not, see <http://www.gnu.org/licenses/>.  */
> +
> + /* This test runs getent twice to parse a /etc/hosts with a very
> +   long line. Prior to fixing this parser this would crash getent.  */

Make "This" and "long" line up please.

> +
> +#include <stdlib.h>
> +#include <nss.h>
> +#include <support/check.h>
> +
> +static int
> +do_test (void)
> +{
> +  int ret;
> +
> + /* Run getent to fetch the IPv4 address for host test4.
> +   This forces /etc/hosts to be parsed.  */

Make "/* Run..." start on the 3rd column, and then make
"This forces" line up with "Run".

> +

Remove this empty line so the comment is together with the code.

> +  ret = system("getent ahostsv4 test4");
> +  if (ret != 0)
> +    FAIL_EXIT1("ahostsv4 failed");
> +
> + /* Likewise for IPv6.  */
> +

Make "/* Likewise..." start on the 3rd column.

Remove the following empty line so the comment is together with
the code.

> +  ret = system("getent ahostsv6 test6");
> +  if (ret != 0)
> +    FAIL_EXIT1("ahostsv6 failed");

Add an empty line here after the FAIL_EXIT1 so exit (0);
is in a visual group by itself.

> +  exit (0);
> +}

Add an empty line here so the #include is in a visual group
by itself.

> +#include <support/test-driver.c>
> diff --git a/nss/tst-nss-files-hosts-long.root/etc/hosts b/nss/tst-nss-files-hosts-long.root/etc/hosts
> new file mode 100644
> index 0000000000..299e661082
> --- /dev/null
> +++ b/nss/tst-nss-files-hosts-long.root/etc/hosts
> @@ -0,0 +1,11 @@
> +# This data is valid and short.
> +

Remove empty line. Grouping the comment and the data it relates to.

> +192.168.1.1 test4.example.com test4
> +::2 test6.example.com test6
> +
> +# Long line data is arbitrary and not specifically chosen.
> +# They key issue is that it should be long to trigger the parser failure.
> +

Remove empty line. Grouping the comment and the data it relates to.

> +192.168.2.2  aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa.ru
> +#aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
> +
> -- 2.17.1