[Toybox] [PATCH] dirname: support multiple arguments.

[enh]

early ping because i'm sure whether this one arrived just too late to
be committed when the others were (it was the last), or whether
dirname/basename were sufficiently similar that you think you've
already committed this one too :-)
On Tue, Nov 13, 2018 at 2:19 PM enh <enh at google.com> wrote:
>
> ---
>  tests/dirname.test   | 1 +
>  toys/posix/dirname.c | 6 ++++--
>  2 files changed, 5 insertions(+), 2 deletions(-)
>
> diff --git a/tests/dirname.test b/tests/dirname.test
> index 3ea8919..47b26e0 100755
> --- a/tests/dirname.test
> +++ b/tests/dirname.test
> @@ -8,3 +8,4 @@ testing "/-only" "dirname ///////" "/\n" "" ""
>  testing "trailing /" "dirname a//////" ".\n" "" ""
>  testing "combined" "dirname /////a///b///c///d/////" "/////a///b///c\n" "" ""
>  testing "/a/" "dirname /////a///" "/\n" "" ""
> +testing "multiple" "dirname hello/a world/b" "hello\nworld\n" "" ""
> diff --git a/toys/posix/dirname.c b/toys/posix/dirname.c
> index 06470ad..fa84af2 100644
> --- a/toys/posix/dirname.c
> +++ b/toys/posix/dirname.c
> @@ -10,7 +10,7 @@ config DIRNAME
>    bool "dirname"
>    default y
>    help
> -    usage: dirname PATH
> +    usage: dirname PATH...
>
>      Show directory portion of path.
>  */
> @@ -19,5 +19,7 @@ config DIRNAME
>
>  void dirname_main(void)
>  {
> -  puts(dirname(*toys.optargs));
> +  char **arg;
> +
> +  for (arg = toys.optargs; *arg; ++arg) puts(dirname(*arg));
>  }
> --
> 2.19.1.930.g4563a0d9d0-goog