[Toybox] [PATCH] Fix load_policy error reporting.

[enh]

submitted to AOSP as
https://android-review.googlesource.com/#/c/145712/ (SHA
f697e055e906e35908cac0a356d986e466765de6).

On Sat, Mar 28, 2015 at 1:16 PM, enh <enh at google.com> wrote:
> Fix load_policy error reporting.
>
> Also switch to xopen for O_CLOEXEC paranoia and to avoid a conditional.
>
> diff --git a/toys/android/load_policy.c b/toys/android/load_policy.c
> index aa59f36..8496736 100644
> --- a/toys/android/load_policy.c
> +++ b/toys/android/load_policy.c
> @@ -20,18 +20,13 @@ config LOAD_POLICY
>  void load_policy_main(void)
>  {
>    char *path = *toys.optargs;
> -  char *policy_data = 0;
> -  off_t policy_len;
> -  int fd;
> -
> -  if ((fd = open(path, O_RDONLY)) != -1) {
> -    policy_len = fdlength(fd);
> -    policy_data = mmap(0, policy_len, PROT_READ, MAP_PRIVATE, fd, 0);
> -    close(fd);
> -  }
> +  int fd = xopen(path, O_RDONLY);
> +  off_t policy_len = fdlength(fd);
> +  char *policy_data = mmap(0, policy_len, PROT_READ, MAP_PRIVATE, fd, 0);
>
> +  close(fd);
>    if (!policy_data || security_load_policy(policy_data, policy_len) < 0)
> -    perror_exit("Couldn't %s %s: %s", policy_data ? "load" : "read", path);
> +    perror_exit("Couldn't %s %s", policy_data ? "load" : "read", path);
>
>    munmap(policy_data, policy_len);
>  }



-- 
Elliott Hughes - http://who/enh - http://jessies.org/~enh/
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