On Thu, Sep 01, 2016 at 02:43:30AM +0300, Eugene Syromyatnikov wrote:
> * tests/readahead.c: New file.
> * tests/readahead.test: New test.
> * tests/.gitignore: Add readahead.
> * tests/Makefile.am (check_PROGRAMS): Likewise.
> (DECODER_TESTS): Add readahead.test.
> ---
> Simple test for simple decoder.
>
> tests/.gitignore | 1 +
> tests/Makefile.am | 2 ++
> tests/readahead.c | 63
> ++++++++++++++++++++++++++++++++++++++++++++++++++
> tests/readahead.test | 6 +++++
> 4 files changed, 72 insertions(+)
> create mode 100644 tests/readahead.c
> create mode 100755 tests/readahead.test
>
> diff --git a/tests/.gitignore b/tests/.gitignore
> index 5c5d092..8c41bea 100644
> --- a/tests/.gitignore
> +++ b/tests/.gitignore
> @@ -185,6 +185,7 @@ pselect6
> ptrace
> pwritev
> read-write
> +readahead
> readdir
> readlink
> readlinkat
> diff --git a/tests/Makefile.am b/tests/Makefile.am
> index b879bf4..d7421fc 100644
> --- a/tests/Makefile.am
> +++ b/tests/Makefile.am
> @@ -241,6 +241,7 @@ check_PROGRAMS = \
> ptrace \
> pwritev \
> read-write \
> + readahead \
> readdir \
> readlink \
> readlinkat \
> @@ -568,6 +569,7 @@ DECODER_TESTS = \
> ptrace.test \
> pwritev.test \
> read-write.test \
> + readahead.test \
> readdir.test \
> readlink.test \
> readlinkat.test \
> diff --git a/tests/readahead.c b/tests/readahead.c
> new file mode 100644
> index 0000000..307dbff
> --- /dev/null
> +++ b/tests/readahead.c
> @@ -0,0 +1,63 @@
> +#include "tests.h"
> +#include <asm/unistd.h>
> +
> +#ifdef __NR_readahead
> +
> +# include <fcntl.h>
> +# include <stdio.h>
> +
> +static const int fds[] = {
> + -0x80000000,
> + -100,
> + -1,
> + 0,
> + 1,
> + 2,
> + 0x7fffffff,
> +};
> +
> +static const off64_t offsets[] = {
> + -0x8000000000000000LL,
> + -0x5060708090a0b0c0LL,
> + -1LL,
> + 0,
> + 1,
> + 0xbadfaced,
> + 0x7fffffffffffffffLL,
> +};
> +
> +static const unsigned long counts[] = {
> + 0UL,
> + 0xdeadca75,
> + (unsigned long)0xface1e55beeff00dULL,
> + (unsigned long)0xffffffffffffffffULL,
> +};
> +
> +int
> +main(void)
> +{
> + unsigned i;
> + unsigned j;
> + unsigned k;
> + ssize_t rc;
> +
> + for (i = 0; i < ARRAY_SIZE(fds); i++)
> + for (j = 0; j < ARRAY_SIZE(offsets); j++)
> + for (k = 0; k < ARRAY_SIZE(counts); k++) {
> + rc = readahead(fds[i], offsets[j], counts[k]);
> +
> + printf("readahead(%d, %lld, %lu) = "
> + "%ld %s (%m)\n", fds[i],
> + (long long)offsets[j], counts[k], rc,
> + errno2name());What if this syscall returned 0? -- ldv
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