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server: Clean up socket destruction

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The code here is wrong, leaky, and inconsistent. We don't free,
unlink or clean up things when we should in every error path.

Centralize the data destruction so it's easier to keep track of
and easier to bug fix.
This commit is contained in:
Jasper St. Pierre 2014-05-08 10:22:25 -04:00
parent 34dfdb4ee3
commit 68dd7d1f5f
1 changed files with 25 additions and 26 deletions
Download patch file Download diff file Expand all files Collapse all files

51
src/wayland-server.c
View file

@ -840,6 +840,23 @@ wl_display_create(void)
return display;
}
static void
wl_socket_destroy(struct wl_socket *s)
{
if (s->source)
wl_event_source_remove(s->source);
if (s->addr.sun_path[0])
unlink(s->addr.sun_path);
if (s->fd)
close(s->fd);
if (s->lock_addr[0])
unlink(s->lock_addr);
if (s->fd_lock)
close(s->fd_lock);
free(s);
}
WL_EXPORT void
wl_display_destroy(struct wl_display *display)
{
@ -849,12 +866,7 @@ wl_display_destroy(struct wl_display *display)
wl_signal_emit(&display->destroy_signal, display);
wl_list_for_each_safe(s, next, &display->socket_list, link) {
wl_event_source_remove(s->source);
unlink(s->addr.sun_path);
close(s->fd);
unlink(s->lock_addr);
close(s->fd_lock);
free(s);
wl_socket_destroy(s);
}
wl_event_loop_destroy(display->loop);
@ -1067,12 +1079,13 @@ wl_display_add_socket(struct wl_display *display, const char *name)
}
s = malloc(sizeof *s);
memset(s, 0, sizeof *s);
if (s == NULL)
return -1;
s->fd = wl_os_socket_cloexec(PF_LOCAL, SOCK_STREAM, 0);
if (s->fd < 0) {
free(s);
wl_socket_destroy(s);
return -1;
}
@ -1081,7 +1094,6 @@ wl_display_add_socket(struct wl_display *display, const char *name)
if (name == NULL)
name = "wayland-0";
memset(&s->addr, 0, sizeof s->addr);
s->addr.sun_family = AF_LOCAL;
name_size = snprintf(s->addr.sun_path, sizeof s->addr.sun_path,
"%s/%s", runtime_dir, name) + 1;
@ -1090,8 +1102,7 @@ wl_display_add_socket(struct wl_display *display, const char *name)
if (name_size > (int)sizeof s->addr.sun_path) {
wl_log("error: socket path \"%s/%s\" plus null terminator"
" exceeds 108 bytes\n", runtime_dir, name);
close(s->fd);
free(s);
wl_socket_destroy(s);
/* to prevent programs reporting
* "failed to add socket: Success" */
errno = ENAMETOOLONG;
@ -1100,28 +1111,20 @@ wl_display_add_socket(struct wl_display *display, const char *name)
s->fd_lock = get_socket_lock(s);
if (s->fd_lock < 0) {
close(s->fd);
free(s);
wl_socket_destroy(s);
return -1;
}
size = offsetof (struct sockaddr_un, sun_path) + name_size;
if (bind(s->fd, (struct sockaddr *) &s->addr, size) < 0) {
wl_log("bind() failed with error: %m\n");
close(s->fd);
unlink(s->lock_addr);
close(s->fd_lock);
free(s);
wl_socket_destroy(s);
return -1;
}
if (listen(s->fd, 1) < 0) {
wl_log("listen() failed with error: %m\n");
unlink(s->addr.sun_path);
close(s->fd);
unlink(s->lock_addr);
close(s->fd_lock);
free(s);
wl_socket_destroy(s);
return -1;
}
@ -1129,11 +1132,7 @@ wl_display_add_socket(struct wl_display *display, const char *name)
WL_EVENT_READABLE,
socket_data, display);
if (s->source == NULL) {
unlink(s->addr.sun_path);
close(s->fd);
unlink(s->lock_addr);
close(s->fd_lock);
free(s);
wl_socket_destroy(s);
return -1;
}
wl_list_insert(display->socket_list.prev, &s->link);