New test for ftime

  This test verifies the sanity of ftime and exposes bugs such as BZ #16430.
It takes between one and two seconds to finish.

ChangeLog:

2014-09-04  Arjun Shankar  <arjun.is@lostca.se>

	* time/tst-ftime.c: New test.
	* time/Makefile (tests): Add tst-ftime.
---
 time/Makefile    |  2 +-
 time/tst-ftime.c | 51 +++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 52 insertions(+), 1 deletion(-)
 create mode 100644 time/tst-ftime.c
  

On Fri, Sep 05, 2014 at 12:05:51AM +0200, Arjun Shankar wrote:
> This test verifies the sanity of ftime and exposes bugs such as BZ #16430.
> It takes between one and two seconds to finish.

Thanks!

> 
> ChangeLog:
> 
> 2014-09-04  Arjun Shankar  <arjun.is@lostca.se>
> 
> 	* time/tst-ftime.c: New test.
> 	* time/Makefile (tests): Add tst-ftime.
> ---
>  time/Makefile    |  2 +-
>  time/tst-ftime.c | 51 +++++++++++++++++++++++++++++++++++++++++++++++++++
>  2 files changed, 52 insertions(+), 1 deletion(-)
>  create mode 100644 time/tst-ftime.c

> diff --git a/time/Makefile b/time/Makefile
> index a07c041..55c1de8 100644
> --- a/time/Makefile
> +++ b/time/Makefile
> @@ -37,7 +37,7 @@ aux :=	    era alt_digit lc-time-cleanup
>  tests	:= test_time clocktest tst-posixtz tst-strptime tst_wcsftime \
>  	   tst-getdate tst-mktime tst-mktime2 tst-ftime_l tst-strftime \
>  	   tst-mktime3 tst-strptime2 bug-asctime bug-asctime_r bug-mktime1 \
> -	   tst-strptime3 bug-getdate1 tst-strptime-whitespace
> +	   tst-strptime3 bug-getdate1 tst-strptime-whitespace tst-ftime
>  
>  include ../Rules
>  
> diff --git a/time/tst-ftime.c b/time/tst-ftime.c
> new file mode 100644
> index 0000000..9345915f
> --- /dev/null
> +++ b/time/tst-ftime.c
> @@ -0,0 +1,51 @@
> +/* Copyright (C) 2014 Free Software Foundation, Inc.

Add a line describing the test.

> +   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; if not, see
> +   <http://www.gnu.org/licenses/>.  */
> +
> +#include <sys/timeb.h>
> +#include <err.h>
> +
> +/* The test takes between 1 and 2 seconds.  */
> +#define TIMEOUT 3

Put this #define near the end along with the TEST_FUNCTION definition.

> +
> +static int
> +do_test (void)
> +{
> +  struct timeb prev, curr = {.time = 0, .millitm = 0};
> +  int sec = 0;
> +
> +  while (sec != 3)
> +    {
> +      prev = curr;
> +
> +      if (ftime (&curr))
> +        errx (1, "ftime returned an error");

Use:

	  printf ("ftime returned an error");
	  return 1;

All test output ought to go into $(test).out.  Likewise for all cases
below.

> +
> +      if (curr.time < prev.time)
> +        errx (1, "ftime's time flowed backwards");
> +
> +      if (curr.time == prev.time
> +          && curr.millitm < prev.millitm)
> +        errx (1, "ftime's millitm flowed backwards");
> +
> +      if (curr.time > prev.time)
> +        sec ++;
> +    }
> +  return 0;
> +}
> +
> +#define TEST_FUNCTION do_test ()
> +#include "../test-skeleton.c"