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Avoid format-truncation warning

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The existing code gives this error when compiled with GCC 12:

../sway/server.c: In function ‘server_init’:
../sway/server.c:217:75: error: ‘%d’ directive output may be truncated writing between 1 and 11 bytes into a region of size 8 [-Werror=format-truncation=]
  217 |                 snprintf(name_candidate, sizeof(name_candidate), "wayland-%d", i);
      |                                                                           ^~
../sway/server.c:217:66: note: directive argument in the range [-2147483647, 32]
  217 |                 snprintf(name_candidate, sizeof(name_candidate), "wayland-%d", i);
      |                                                                  ^~~~~~~~~~~~
../sway/server.c:217:17: note: ‘snprintf’ output between 10 and 20 bytes into a destination of size 16
  217 |                 snprintf(name_candidate, sizeof(name_candidate), "wayland-%d", i);
      |                 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Because i is never negative, this is a false positive, but it is easy to
change i to unsigned to silence the error.
This commit is contained in:
Daniel De Graaf 2022-04-09 12:03:52 -04:00 committed by Simon Ser
parent 09553a7b5b
commit 20181974c2
1 changed files with 2 additions and 2 deletions
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4
sway/server.c
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@ -213,8 +213,8 @@ bool server_init(struct sway_server *server) {
// Avoid using "wayland-0" as display socket
char name_candidate[16];
for (int i = 1; i <= 32; ++i) {
snprintf(name_candidate, sizeof(name_candidate), "wayland-%d", i);
for (unsigned int i = 1; i <= 32; ++i) {
snprintf(name_candidate, sizeof(name_candidate), "wayland-%u", i);
if (wl_display_add_socket(server->wl_display, name_candidate) >= 0) {
server->socket = strdup(name_candidate);
break;