Re: [Qemu-devel] [PATCH 1/3] contrib/rdmacm-mux: remove Wno-format-truncation flag

[Yuval Shaia <yuval.shaia@oracle.com>]

On Sat, Jan 12, 2019 at 05:02:23PM +0200, Marcel Apfelbaum wrote:
> The flag is not recognized by some CLANG versions.
> Add proper constraints in code instead.
> 
> Signed-off-by: Marcel Apfelbaum <marcel.apfelbaum@gmail.com>
> ---
>  contrib/rdmacm-mux/Makefile.objs | 2 +-
>  contrib/rdmacm-mux/main.c        | 6 ++++--
>  2 files changed, 5 insertions(+), 3 deletions(-)
> 
> diff --git a/contrib/rdmacm-mux/Makefile.objs b/contrib/rdmacm-mux/Makefile.objs
> index be3eacb6f7..e1ff4fe569 100644
> --- a/contrib/rdmacm-mux/Makefile.objs
> +++ b/contrib/rdmacm-mux/Makefile.objs
> @@ -1,4 +1,4 @@
>  ifdef CONFIG_PVRDMA
> -CFLAGS += -libumad -Wno-format-truncation
> +CFLAGS += -libumad
>  rdmacm-mux-obj-y = main.o
>  endif
> diff --git a/contrib/rdmacm-mux/main.c b/contrib/rdmacm-mux/main.c
> index 835a7f9214..64676030c5 100644
> --- a/contrib/rdmacm-mux/main.c
> +++ b/contrib/rdmacm-mux/main.c
> @@ -42,6 +42,8 @@
>  
>  /* The below can be override by command line parameter */
>  #define UNIX_SOCKET_PATH "/var/run/rdmacm-mux"
> +/* Has format %s-%s-%d" <path>-<rdma-dev--name>-<port> */
> +#define SOCKET_PATH_MAX (PATH_MAX - NAME_MAX - sizeof(int) - 2)
>  #define RDMA_PORT_NUM 1
>  
>  typedef struct RdmaCmServerArgs {
> @@ -95,7 +97,7 @@ static void help(const char *progname)
>  static void parse_args(int argc, char *argv[])
>  {
>      int c;
> -    char unix_socket_path[PATH_MAX];
> +    char unix_socket_path[SOCKET_PATH_MAX];
>  
>      strcpy(server.args.rdma_dev_name, "");
>      strcpy(unix_socket_path, UNIX_SOCKET_PATH);
> @@ -113,7 +115,7 @@ static void parse_args(int argc, char *argv[])
>  
>          case 's':
>              /* This is temporary, final name will build below */
> -            strncpy(unix_socket_path, optarg, PATH_MAX);
> +            strncpy(unix_socket_path, optarg, SOCKET_PATH_MAX);
>              break;
>  

Reviewed-by: Yuval Shaia <yuval.shaia@oracle.com>

>          case 'p':
> -- 
> 2.17.1
>