Re: [PATCH] tools/libxc: Annotate xc_report_error with __attribute__((format))

[Ian Campbell <ian.campbell@citrix.com>]

On Tue, 2014-06-03 at 18:45 +0100, Andrew Cooper wrote:
> diff --git a/tools/libxc/xc_domain_restore.c b/tools/libxc/xc_domain_restore.c
> index 89af1ad..d950639 100644
> --- a/tools/libxc/xc_domain_restore.c
> +++ b/tools/libxc/xc_domain_restore.c
> @@ -102,7 +102,7 @@ static ssize_t rdexact(xc_interface *xch, struct restore_ctx *ctx,
>              errno = 0;
>          }
>          if ( len <= 0 ) {
> -            ERROR("%s failed (read rc: %d, errno: %d)", __func__, len, errno);
> +            ERROR("%s failed (read rc: %ld, errno: %d)", __func__, (long)len, errno);

The correct way to print an ssize_t is %zd.

>              return -1;
>          }
>          offset += len;
> @@ -443,7 +443,7 @@ static int compat_buffer_qemu(xc_interface *xch, struct restore_ctx *ctx,
>      }
>  
>      if ( memcmp(qbuf, "QEVM", 4) ) {
> -        ERROR("Invalid QEMU magic: 0x%08x", *(unsigned long*)qbuf);
> +        ERROR("Invalid QEMU magic: 0x%08x", *(uint32_t*)qbuf);

0x%08lx with unsigned long or 0x%PRIx32 with uint32_t, not some hybrid,
please. (I thin %..lx is the right answer here)

>          free(qbuf);
>          return -1;
>      }

Ian.