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/*
* 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"
union cmsg_data { unsigned char b[4]; int fd; };
int
weston_launcher_open(struct weston_compositor *compositor,
const char *path, int flags)
{
int sock = compositor->launcher_sock;
int n, 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;
if (sock == -1)
return open(path, flags | O_CLOEXEC);
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(sock, 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(sock, &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");
return -1;
}
return data->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;
struct weston_launcher_set_master message;
union cmsg_data *data;
if (compositor->launcher_sock == -1) {
if (master)
return drmSetMaster(drm_fd);
else
return drmDropMaster(drm_fd);
}
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));
data = (union cmsg_data *) CMSG_DATA(cmsg);
data->fd = drm_fd;
msg.msg_controllen = cmsg->cmsg_len;
iov.iov_base = &message;
iov.iov_len = sizeof message;
message.header.opcode = WESTON_LAUNCHER_DRM_SET_MASTER;
message.set_master = 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;
}
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