static int
launcher_direct_open(struct weston_launcher *launcher_base, const char *path, int flags)
{
struct launcher_direct *launcher = wl_container_of(launcher_base, launcher, base);
struct stat s;
int fd;
fd = open(path, flags | O_CLOEXEC);
if (fd == -1)
return -1;
if (fstat(fd, &s) == -1) {
close(fd);
return -1;
}
if (major(s.st_rdev) == DRM_MAJOR) {
launcher->drm_fd = fd;
if (!is_drm_master(fd)) {
weston_log("drm fd not master\n");
close(fd);
return -1;
}
}
return fd;
}
int
weston_launcher_open(struct weston_launcher *launcher,
const char *path, int flags)
{
int n, fd, ret = -1;
struct msghdr msg;
struct cmsghdr *cmsg;
struct iovec iov;
union cmsg_data *data;
char control[CMSG_SPACE(sizeof data->fd)];
ssize_t len;
struct weston_launcher_open *message;
struct stat s;
if (launcher->logind)
return weston_logind_open(launcher->logind, path, flags);
if (launcher->fd == -1) {
fd = open(path, flags | O_CLOEXEC);
if (fd == -1)
return -1;
if (fstat(fd, &s) == -1) {
close(fd);
return -1;
}
if (major(s.st_rdev) == DRM_MAJOR) {
launcher->drm_fd = fd;
if (!is_drm_master(fd)) {
weston_log("drm fd not master\n");
close(fd);
return -1;
}
}
return fd;
}
n = sizeof(*message) + strlen(path) + 1;
message = malloc(n);
if (!message)
return -1;
message->header.opcode = WESTON_LAUNCHER_OPEN;
message->flags = flags;
strcpy(message->path, path);
do {
len = send(launcher->fd, message, n, 0);
} while (len < 0 && errno == EINTR);
free(message);
memset(&msg, 0, sizeof msg);
iov.iov_base = &ret;
iov.iov_len = sizeof ret;
msg.msg_iov = &iov;
msg.msg_iovlen = 1;
msg.msg_control = control;
msg.msg_controllen = sizeof control;
do {
len = recvmsg(launcher->fd, &msg, MSG_CMSG_CLOEXEC);
} while (len < 0 && errno == EINTR);
if (len != sizeof ret ||
ret < 0)
return -1;
cmsg = CMSG_FIRSTHDR(&msg);
if (!cmsg ||
cmsg->cmsg_level != SOL_SOCKET ||
cmsg->cmsg_type != SCM_RIGHTS) {
fprintf(stderr, "invalid control message\n");
return -1;
}
data = (union cmsg_data *) CMSG_DATA(cmsg);
if (data->fd == -1) {
fprintf(stderr, "missing drm fd in socket request\n");
return -1;
}
return data->fd;
}
