On Mon, 21 Apr 2014 23:51:03 +0000
"Bryce W. Harrington" <[email protected]> wrote:

> Checking for these errors in the clients is perhaps a bit gratuitous but
> can't hurt.
> 
> Signed-off-by: Bryce Harrington <[email protected]>
> ---
>  clients/gears.c    |    3 +++
>  clients/terminal.c |   20 ++++++++++++++++++++
>  2 files changed, 23 insertions(+)
> 
> diff --git a/clients/gears.c b/clients/gears.c
> index 93a86b4..22159be 100644
> --- a/clients/gears.c
> +++ b/clients/gears.c
> @@ -402,6 +402,9 @@ gears_create(struct display *display)
>       int i;
>  
>       gears = zalloc(sizeof *gears);
> +     if (gears == NULL)
> +             die("failed to zalloc memory for gears\n");
> +
>       gears->d = display;
>       gears->window = window_create(display);
>       gears->widget = window_frame_create(gears->window, gears);
> diff --git a/clients/terminal.c b/clients/terminal.c
> index 5931ce2..6bdb039 100644
> --- a/clients/terminal.c
> +++ b/clients/terminal.c
> @@ -773,9 +773,24 @@ terminal_resize_cells(struct terminal *terminal,
>               terminal->max_width = width;
>               data_pitch = width * sizeof(union utf8_char);
>               data = zalloc(data_pitch * terminal->buffer_height);
> +             if (data == NULL) {
> +                     fprintf(stderr, "failed to zalloc data: %m\n");
> +                     return;
> +             }
>               attr_pitch = width * sizeof(struct attr);
>               data_attr = malloc(attr_pitch * terminal->buffer_height);
> +             if (data_attr == NULL) {
> +                     fprintf(stderr, "failed to zalloc data_attr: %m\n");
> +                     free(data);
> +                     return;
> +             }
>               tab_ruler = zalloc(width);
> +             if (tab_ruler == NULL) {
> +                     fprintf(stderr, "failed to zalloc tab_ruler: %m\n");
> +                     free(data);
> +                     free(data_attr);
> +                     return;
> +             }
>               attr_init(data_attr, terminal->curr_attr,
>                         width * terminal->buffer_height);
>  
> @@ -2835,6 +2850,8 @@ terminal_create(struct display *display)
>       cairo_text_extents_t text_extents;
>  
>       terminal = xzalloc(sizeof *terminal);
> +     if (terminal == NULL)
> +             return NULL;

No need to check 'terminal', xzalloc() will exit() if it ever goes NULL.

>       terminal->color_scheme = &DEFAULT_COLORS;
>       terminal_init(terminal);
>       terminal->margin_top = 0;
> @@ -2961,6 +2978,9 @@ terminal_run(struct terminal *terminal, const char 
> *path)
>       } else if (pid < 0) {
>               fprintf(stderr, "failed to fork and create pty (%m).\n");
>               return -1;
> +     } else if (terminal == NULL) {
> +             fprintf(stderr, "out of memory: %m\n");
> +             return -1;
>       }
>  
>       terminal->master = master;

I'd be fine with converting all the *allocs to the x*alloc which checks
for NULL and exits. All programs using window.h can do that.


Thanks,
pq
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