[LTP] [PATCH 2/2] Add error tests for pathconf() system call

[Xiao Yang]

Hi Yang

It looks good to me.
Reviewed-by: Xiao Yang <yangx.jy@fujitsu.com>

Best Regards,
Xiao Yang

On 2023/11/2 16:05, Yang Xu wrote:
> A series of tests were added to test the negative results of pathconf()
> 
> Signed-off-by: Yang Xu <xuyang2018.jy@fujitsu.com>
> ---
>   runtest/syscalls                              |  1 +
>   testcases/kernel/syscalls/pathconf/.gitignore |  1 +
>   .../kernel/syscalls/pathconf/pathconf02.c     | 97 +++++++++++++++++++
>   3 files changed, 99 insertions(+)
>   create mode 100644 testcases/kernel/syscalls/pathconf/pathconf02.c
> 
> diff --git a/runtest/syscalls b/runtest/syscalls
> index 1851752cf..e20f0c49e 100644
> --- a/runtest/syscalls
> +++ b/runtest/syscalls
> @@ -971,6 +971,7 @@ madvise11 madvise11
>   newuname01 newuname01
>   
>   pathconf01 pathconf01
> +pathconf02 pathconf02
>   
>   pause01 pause01
>   pause02 pause02
> diff --git a/testcases/kernel/syscalls/pathconf/.gitignore b/testcases/kernel/syscalls/pathconf/.gitignore
> index 31abe8a28..82e38b253 100644
> --- a/testcases/kernel/syscalls/pathconf/.gitignore
> +++ b/testcases/kernel/syscalls/pathconf/.gitignore
> @@ -1 +1,2 @@
>   /pathconf01
> +/pathconf02
> diff --git a/testcases/kernel/syscalls/pathconf/pathconf02.c b/testcases/kernel/syscalls/pathconf/pathconf02.c
> new file mode 100644
> index 000000000..8d7996190
> --- /dev/null
> +++ b/testcases/kernel/syscalls/pathconf/pathconf02.c
> @@ -0,0 +1,97 @@
> +// SPDX-License-Identifier: GPL-2.0-or-later
> +/*
> + * Copyright (c) 2023 FUJITSU LIMITED. All rights reserved.
> + * Author: Yang Xu <xuyang2018.jy@cn.fujitsu.com>
> + */
> +
> +/*\
> + * [Description]
> + *
> + * Verify that,
> + *
> + * - pathconf() fails with ENOTDIR if A component used as a directory
> + *   in path is not in fact a directory.
> + * - pathconf() fails with ENOENT if path is an empty string.
> + * - pathconf() fails with ENAMETOOLONG if path is too long.
> + * - pathconf() fails with EINVA if name is invalid.
> + * - pathconf() fails with EACCES if search permission is denied for
> + *   one of the directories in the path prefix of path.
> + * - pathconf() fails with ELOOP if too many symbolic links were
> + *   encountered while resolving path.
> + */
> +
> +#define FILEPATH "testfile/testfile_1"
> +#define TESTELOOP "test_eloop1"
> +
> +#include <stdlib.h>
> +#include <pwd.h>
> +#include "tst_test.h"
> +
> +static char *fpath;
> +static char *emptypath;
> +static char path[PATH_MAX + 2];
> +static char *long_path = path;
> +static char *abs_path;
> +static char *testeloop;
> +static struct passwd *user;
> +
> +static struct tcase {
> +	char **path;
> +	int name;
> +	int exp_errno;
> +	char *desc;
> +} tcases[] = {
> +	{&fpath, 0, ENOTDIR, "path prefix is not a directory"},
> +	{&emptypath, 0, ENOENT, "path is an empty string"},
> +	{&long_path, 0, ENAMETOOLONG, "path is too long"},
> +	{&abs_path, -1, EINVAL, "name is invalid"},
> +	{&abs_path, 0, EACCES, "without full permissions of the path prefix"},
> +	{&testeloop, 0, ELOOP, "too many symbolic links"},
> +};
> +
> +static void verify_fpathconf(unsigned int i)
> +{
> +	struct tcase *tc = &tcases[i];
> +
> +	if (tc->exp_errno == EACCES)
> +		SAFE_SETEUID(user->pw_uid);
> +
> +	TST_EXP_FAIL(pathconf(*tc->path, tc->name), tc->exp_errno,
> +		     "pathconf() fail with %s", tc->desc);
> +
> +	if (tc->exp_errno == EACCES)
> +		SAFE_SETEUID(0);
> +}
> +
> +static void setup(void)
> +{
> +	user = SAFE_GETPWNAM("nobody");
> +
> +	SAFE_TOUCH("testfile", 0777, NULL);
> +
> +	char *tmpdir =  tst_get_tmpdir();
> +
> +	abs_path = tst_aprintf("%s/%s", tmpdir, FILEPATH);
> +
> +	SAFE_CHMOD(tmpdir, 0);
> +	free(tmpdir);
> +
> +	memset(path, 'a', PATH_MAX + 2);
> +
> +	SAFE_SYMLINK("test_eloop1", "test_eloop2");
> +	SAFE_SYMLINK("test_eloop2", "test_eloop1");
> +}
> +
> +static struct tst_test test = {
> +	.tcnt = ARRAY_SIZE(tcases),
> +	.test = verify_fpathconf,
> +	.setup = setup,
> +	.needs_tmpdir = 1,
> +	.bufs = (struct tst_buffers []) {
> +		{&fpath, .str = FILEPATH},
> +		{&emptypath, .str = ""},
> +		{&testeloop, .str = TESTELOOP},
> +		{},
> +	},
> +	.needs_root = 1,
> +};