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swaybar: add NULL check when listing workspaces 

For some reason my version of sway doesn't show workspace names:

    $ swaymsg -t get_outputs
    Output HDMI-A-1 '(null) (null) (null)' (inactive)
    Output HDMI-A-2 '(null) (null) (null)' (inactive)

Which is weird, but it's no reason to crash swaybar. The field is
totally missing from the JSON, so it ends up doing strcmp(NULL, name)
which is undefined behavior.
This commit is contained in:
Milkey Mouse 2020-05-20 13:57:56 -07:00 committed by Simon Ser
parent 2bf14cb747
commit 45e4e92172
1 changed files with 1 additions and 1 deletions
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2
swaybar/ipc.c
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@ -360,7 +360,7 @@ bool ipc_get_workspaces(struct swaybar *bar) {
wl_list_for_each(output, &bar->outputs, link) {
const char *ws_output = json_object_get_string(out);
if (strcmp(ws_output, output->name) == 0) {
if (ws_output != NULL && strcmp(ws_output, output->name) == 0) {
struct swaybar_workspace *ws =
calloc(1, sizeof(struct swaybar_workspace));
ws->num = json_object_get_int(num);