diff options
Diffstat (limited to 'src/launcher_util.c')
| -rw-r--r-- | src/launcher_util.c | 164 |
1 files changed, 164 insertions, 0 deletions
diff --git a/src/launcher_util.c b/src/launcher_util.c new file mode 100644 index 0000000..90b57d6 --- /dev/null +++ b/src/launcher_util.c @@ -0,0 +1,164 @@ +/* + * Copyright © 2012 Benjamin Franzke + * + * Permission to use, copy, modify, distribute, and sell this software and + * its documentation for any purpose is hereby granted without fee, provided + * that the above copyright notice appear in all copies and that both that + * copyright notice and this permission notice appear in supporting + * documentation, and that the name of the copyright holders not be used in + * advertising or publicity pertaining to distribution of the software + * without specific, written prior permission. The copyright holders make + * no representations about the suitability of this software for any + * purpose. It is provided "as is" without express or implied warranty. + * + * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS + * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND + * FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY + * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER + * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF + * CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN + * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +#include <errno.h> +#include <sys/socket.h> +#include <sys/types.h> +#include <sys/stat.h> +#include <sys/uio.h> +#include <fcntl.h> + +#include <xf86drm.h> + +#include "compositor.h" +#include "launcher_util.h" +#include "weston-launch.h" + +int +weston_launcher_open(struct weston_compositor *compositor, + const char *path, char flags) +{ + int sock = compositor->launcher_sock; + int fd, n, ret = -1; + struct msghdr msg; + struct cmsghdr *cmsg; + struct iovec iov; + char control[CMSG_SPACE(sizeof fd)]; + char *buf; + ssize_t len; + + fd = open(path, flags); + if (fd > 0) + return fd; + + if (sock == -1) + return -1; + + n = 2 + strlen(path) + 1; + buf = malloc(n); + if (!buf) + return -1; + + buf[0] = WESTON_LAUNCHER_OPEN; + buf[1] = flags; + strcpy(&buf[2], path); + + do { + len = send(sock, buf, n, 0); + } while (len < 0 && errno == EINTR); + + 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(sock, &msg, 0); + } while (len < 0 && errno == EINTR); + + if (len != sizeof ret || + ret < 0) + goto out; + + cmsg = CMSG_FIRSTHDR(&msg); + if (!cmsg || + cmsg->cmsg_level != SOL_SOCKET || + cmsg->cmsg_type != SCM_RIGHTS) { + fprintf(stderr, "invalid control message\n"); + goto out; + } + + fd = *(int *) CMSG_DATA(cmsg); + if (fd == -1) { + fprintf(stderr, "missing drm fd in socket request"); + return -1; + } + fcntl(fd, F_SETFD, FD_CLOEXEC); + +out: + free(buf); + return ret < 0 ? ret : fd; +} + +int +weston_launcher_drm_set_master(struct weston_compositor *compositor, + int drm_fd, char master) +{ + struct msghdr msg; + struct cmsghdr *cmsg; + struct iovec iov; + char control[CMSG_SPACE(sizeof(drm_fd))]; + int ret; + ssize_t len; + char buf[2]; + + if (master) + ret = drmSetMaster(drm_fd); + else + ret = drmDropMaster(drm_fd); + if (ret == 0) + return 0; + + if (compositor->launcher_sock == -1) + return -1; + + memset(&msg, 0, sizeof msg); + msg.msg_iov = &iov; + msg.msg_iovlen = 1; + msg.msg_control = control; + msg.msg_controllen = sizeof control; + cmsg = CMSG_FIRSTHDR(&msg); + cmsg->cmsg_level = SOL_SOCKET; + cmsg->cmsg_type = SCM_RIGHTS; + cmsg->cmsg_len = CMSG_LEN(sizeof(drm_fd)); + + *(int *) CMSG_DATA(cmsg) = drm_fd; + msg.msg_controllen = cmsg->cmsg_len; + + iov.iov_base = buf; + iov.iov_len = sizeof buf; + + buf[0] = WESTON_LAUNCHER_DRM_SET_MASTER; + buf[1] = master; + + do { + len = sendmsg(compositor->launcher_sock, &msg, 0); + } while (len < 0 && errno == EINTR); + if (len < 0) + return -1; + + do { + len = recv(compositor->launcher_sock, &ret, sizeof ret, 0); + } while (len < 0 && errno == EINTR); + if (len < 0) + return -1; + + return ret; +} + |