Re: [Qemu-devel] [PATCH v6 08/10] tests/bios-tables-test: check the value returned by fopen()

[Michael S. Tsirkin]

On Thu, Aug 14, 2014 at 03:29:19PM +0800, zhanghailiang wrote:
> The function fopen() may fail, so check its return value.
> 
> Signed-off-by: zhanghailiang <address@hidden>
> Signed-off-by: Li Liu <address@hidden>
> Reviewed-by: Alex Bennée <address@hidden>
> ---
>  tests/bios-tables-test.c | 5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff --git a/tests/bios-tables-test.c b/tests/bios-tables-test.c
> index 045eb27..28ec28d 100644
> --- a/tests/bios-tables-test.c
> +++ b/tests/bios-tables-test.c
> @@ -790,6 +790,11 @@ int main(int argc, char *argv[])
>      const char *arch = qtest_get_arch();
>      FILE *f = fopen(disk, "w");
>      int ret;
> +
> +    if (f == NULL) {

if (!f) please

> +        fprintf(stderr, "Couldn't open \"%s\": %s", disk, strerror(errno));
> +        return -1;
> +    }
>      fwrite(boot_sector, 1, sizeof boot_sector, f);
>      fclose(f);
>  
> -- 
> 1.7.12.4
>