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server: Split out code to initialize the socket address for a display name

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We'll use this to autodetect a good socket to open on.
This commit is contained in:
Jasper St. Pierre 2014-05-08 10:25:13 -04:00
parent 6e8a662403
commit 79b1d2039a
1 changed files with 28 additions and 17 deletions
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45
src/wayland-server.c
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@ -1060,11 +1060,9 @@ get_socket_lock(struct wl_socket *socket)
return fd_lock; return fd_lock;
} }
WL_EXPORT int static int
wl_display_add_socket(struct wl_display *display, const char *name) wl_socket_init_for_display_name(struct wl_socket *s, const char *name)
{ {
struct wl_socket *s;
socklen_t size;
int name_size; int name_size;
const char *runtime_dir; const char *runtime_dir;
@ -1078,6 +1076,29 @@ wl_display_add_socket(struct wl_display *display, const char *name)
return -1; return -1;
} }
s->addr.sun_family = AF_LOCAL;
name_size = snprintf(s->addr.sun_path, sizeof s->addr.sun_path,
"%s/%s", runtime_dir, name) + 1;
assert(name_size > 0);
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);
/* to prevent programs reporting
* "failed to add socket: Success" */
errno = ENAMETOOLONG;
return -1;
};
return 0;
}
WL_EXPORT int
wl_display_add_socket(struct wl_display *display, const char *name)
{
struct wl_socket *s;
socklen_t size;
s = malloc(sizeof *s); s = malloc(sizeof *s);
memset(s, 0, sizeof *s); memset(s, 0, sizeof *s);
if (s == NULL) if (s == NULL)
@ -1088,20 +1109,10 @@ wl_display_add_socket(struct wl_display *display, const char *name)
if (name == NULL) if (name == NULL)
name = "wayland-0"; name = "wayland-0";
s->addr.sun_family = AF_LOCAL; if (wl_socket_init_for_display_name(s, name) < 0) {
name_size = snprintf(s->addr.sun_path, sizeof s->addr.sun_path,
"%s/%s", runtime_dir, name) + 1;
assert(name_size > 0);
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);
wl_socket_destroy(s); wl_socket_destroy(s);
/* to prevent programs reporting
* "failed to add socket: Success" */
errno = ENAMETOOLONG;
return -1; return -1;
}; }
s->fd_lock = get_socket_lock(s); s->fd_lock = get_socket_lock(s);
if (s->fd_lock < 0) { if (s->fd_lock < 0) {
@ -1115,7 +1126,7 @@ wl_display_add_socket(struct wl_display *display, const char *name)
return -1; return -1;
} }
size = offsetof (struct sockaddr_un, sun_path) + name_size; size = offsetof (struct sockaddr_un, sun_path) + strlen(s->addr.sun_path);
if (bind(s->fd, (struct sockaddr *) &s->addr, size) < 0) { if (bind(s->fd, (struct sockaddr *) &s->addr, size) < 0) {
wl_log("bind() failed with error: %m\n"); wl_log("bind() failed with error: %m\n");
wl_socket_destroy(s); wl_socket_destroy(s);