[PATCH 4/4] tests: add getsid.test

[Dmitry V. Levin]

On Tue, Apr 19, 2016 at 03:38:35PM +0800, Fei Jie wrote:
> * tests/getsid.c: New file.
> * tests/getsid.test: New test.
> * tests/.gitignore: Add getsid.
> * tests/Makefile.am (check_PROGRAMS): Likewise.
> (DECODER_TESTS): Add getsid.test.
> ---
>  tests/.gitignore  |  1 +
>  tests/Makefile.am |  2 ++
>  tests/getsid.c    | 23 +++++++++++++++++++++++
>  tests/getsid.test |  6 ++++++
>  4 files changed, 32 insertions(+)
>  create mode 100644 tests/getsid.c
>  create mode 100755 tests/getsid.test
> 
> diff --git a/tests/.gitignore b/tests/.gitignore
> index fd5909b..ffc7b1f 100644
> --- a/tests/.gitignore
> +++ b/tests/.gitignore
> @@ -61,6 +61,7 @@ getdents
>  getdents64
>  getrandom
>  getrusage
> +getsid
>  getxxid
>  inet-cmsg
>  ioctl
> diff --git a/tests/Makefile.am b/tests/Makefile.am
> index 7231818..d39df1f 100644
> --- a/tests/Makefile.am
> +++ b/tests/Makefile.am
> @@ -113,6 +113,7 @@ check_PROGRAMS = \
>  	getdents64 \
>  	getrandom \
>  	getrusage \
> +	getsid \
>  	getxxid \
>  	inet-cmsg \
>  	ioctl \
> @@ -327,6 +328,7 @@ DECODER_TESTS = \
>  	getdents64.test \
>  	getrandom.test \
>  	getrusage.test \
> +	getsid.test \
>  	getxxid.test \
>  	inet-cmsg.test \
>  	ioctl.test \
> diff --git a/tests/getsid.c b/tests/getsid.c
> new file mode 100644
> index 0000000..2b67892
> --- /dev/null
> +++ b/tests/getsid.c
> @@ -0,0 +1,23 @@
> +#include "tests.h"
> +#include <sys/syscall.h>
> +
> +#ifdef __NR_getsid
> +
> +# include <stdio.h>
> +# include <unistd.h>
> +
> +int
> +main(void)
> +{
> +	int rc = syscall(__NR_getsid, 0);
> +	printf("getsid(0) = %d\n", rc);

Why don't you just use getsid()?
Printing 0 all the time is boring, let's print a pid instead:

	pid_t pid = getpid();
	printf("getsid(%d) = %d\n", pid, getsid(pid));


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