Moved session/ into backend/

1 files changed, 0 insertions, 241 deletions

diff --git a/session/direct-ipc.c b/session/direct-ipc.c
deleted file mode 100644
index 885662e0..00000000
--- a/session/direct-ipc.c
+++ /dev/null
@@ -1,241 +0,0 @@
-#define _POSIX_C_SOURCE 200809L
-#include <errno.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <fcntl.h>
-#include <unistd.h>
-#include <sys/socket.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-#include <sys/sysmacros.h>
-#include <sys/wait.h>
-#include <xf86drm.h>
-#include <linux/major.h>
-#include <wlr/util/log.h>
-#include "session/direct-ipc.h"
-
-enum { DRM_MAJOR = 226 };
-
-#ifdef HAS_LIBCAP
-#include <sys/capability.h>
-
-static bool have_permissions(void) {
-	cap_t cap = cap_get_proc();
-	cap_flag_value_t val;
-
-	if (!cap || cap_get_flag(cap, CAP_SYS_ADMIN, CAP_PERMITTED, &val) || val != CAP_SET) {
-		wlr_log(L_ERROR, "Do not have CAP_SYS_ADMIN; cannot become DRM master");
-		cap_free(cap);
-		return false;
-	}
-
-	cap_free(cap);
-	return true;
-}
-#else
-static bool have_permissions(void) {
-	if (geteuid() != 0) {
-		wlr_log(L_ERROR, "Do not have root privileges; cannot become DRM master");
-		return false;
-	}
-
-	return true;
-}
-#endif
-
-static void send_msg(int sock, int fd, void *buf, size_t buf_len) {
-	char control[CMSG_SPACE(sizeof(fd))] = {0};
-	struct iovec iovec = { .iov_base = buf, .iov_len = buf_len };
-	struct msghdr msghdr = {0};
-
-	if (buf) {
-		msghdr.msg_iov = &iovec;
-		msghdr.msg_iovlen = 1;
-	}
-
-	if (fd >= 0) {
-		msghdr.msg_control = &control;
-		msghdr.msg_controllen = sizeof(control);
-
-		struct cmsghdr *cmsg = CMSG_FIRSTHDR(&msghdr);
-		*cmsg = (struct cmsghdr) {
-			.cmsg_level = SOL_SOCKET,
-			.cmsg_type = SCM_RIGHTS,
-			.cmsg_len = CMSG_LEN(sizeof(fd)),
-		};
-		memcpy(CMSG_DATA(cmsg), &fd, sizeof(fd));
-	}
-
-	ssize_t ret;
-	do {
-		ret = sendmsg(sock, &msghdr, 0);
-	} while (ret < 0 && errno == EINTR);
-}
-
-static ssize_t recv_msg(int sock, int *fd_out, void *buf, size_t buf_len) {
-	char control[CMSG_SPACE(sizeof(*fd_out))] = {0};
-	struct iovec iovec = { .iov_base = buf, .iov_len = buf_len };
-	struct msghdr msghdr = {0};
-
-	if (buf) {
-		msghdr.msg_iov = &iovec;
-		msghdr.msg_iovlen = 1;
-	}
-
-	if (fd_out) {
-		msghdr.msg_control = &control;
-		msghdr.msg_controllen = sizeof(control);
-	}
-
-	ssize_t ret;
-	do {
-		ret = recvmsg(sock, &msghdr, MSG_CMSG_CLOEXEC);
-	} while (ret < 0 && errno == EINTR);
-
-	if (fd_out) {
-		struct cmsghdr *cmsg = CMSG_FIRSTHDR(&msghdr);
-		if (cmsg) {
-			memcpy(fd_out, CMSG_DATA(cmsg), sizeof(*fd_out));
-		} else {
-			*fd_out = -1;
-		}
-	}
-
-	return ret;
-}
-
-enum msg_type {
-	MSG_OPEN,
-	MSG_SETMASTER,
-	MSG_DROPMASTER,
-	MSG_END,
-};
-
-struct msg {
-	enum msg_type type;
-	char path[256];
-};
-
-static void communicate(int sock) {
-	struct msg msg;
-	int drm_fd = -1;
-	bool running = true;
-
-	while (running && recv_msg(sock, &drm_fd, &msg, sizeof(msg)) >= 0) {
-		switch (msg.type) {
-		case MSG_OPEN:
-			errno = 0;
-
-			// These are the same flags that logind opens files with
-			int fd = open(msg.path, O_RDWR|O_CLOEXEC|O_NOCTTY|O_NONBLOCK);
-			int ret = errno;
-			if (fd == -1) {
-				goto error;
-			}
-
-			struct stat st;
-			if (fstat(fd, &st) < 0) {
-				ret = errno;
-				goto error;
-			}
-
-			uint32_t maj = major(st.st_rdev);
-			if (maj != INPUT_MAJOR && maj != DRM_MAJOR) {
-				ret = ENOTSUP;
-				goto error;
-			}
-
-			if (maj == DRM_MAJOR && drmSetMaster(fd)) {
-				ret = errno;
-			}
-error:
-			send_msg(sock, ret ? -1 : fd, &ret, sizeof(ret));
-			close(fd);
-
-			break;
-
-		case MSG_SETMASTER:
-			drmSetMaster(drm_fd);
-			close(drm_fd);
-			send_msg(sock, -1, NULL, 0);
-			break;
-
-		case MSG_DROPMASTER:
-			drmDropMaster(drm_fd);
-			close(drm_fd);
-			send_msg(sock, -1, NULL, 0);
-			break;
-
-		case MSG_END:
-			running = false;
-			send_msg(sock, -1, NULL, 0);
-			break;
-		}
-	}
-
-	close(sock);
-}
-
-int direct_ipc_open(int sock, const char *path) {
-	struct msg msg = { .type = MSG_OPEN };
-	snprintf(msg.path, sizeof(msg.path), "%s", path);
-
-	send_msg(sock, -1, &msg, sizeof(msg));
-
-	int fd, err;
-	recv_msg(sock, &fd, &err, sizeof(err));
-
-	return err ? -err : fd;
-}
-
-void direct_ipc_setmaster(int sock, int fd) {
-	struct msg msg = { .type = MSG_SETMASTER };
-
-	send_msg(sock, fd, &msg, sizeof(msg));
-	recv_msg(sock, NULL, NULL, 0);
-}
-
-void direct_ipc_dropmaster(int sock, int fd) {
-	struct msg msg = { .type = MSG_DROPMASTER };
-
-	send_msg(sock, fd, &msg, sizeof(msg));
-	recv_msg(sock, NULL, NULL, 0);
-}
-
-void direct_ipc_finish(int sock, pid_t pid) {
-	struct msg msg = { .type = MSG_END };
-
-	send_msg(sock, -1, &msg, sizeof(msg));
-	recv_msg(sock, NULL, NULL, 0);
-
-	waitpid(pid, NULL, 0);
-}
-
-int direct_ipc_start(pid_t *pid_out) {
-	if (!have_permissions()) {
-		return -1;
-	}
-
-	int sock[2];
-	if (socketpair(AF_UNIX, SOCK_SEQPACKET, 0, sock) < 0) {
-		wlr_log_errno(L_ERROR, "Failed to create socket pair");
-		return -1;
-	}
-
-	pid_t pid = fork();
-	if (pid < 0) {
-		wlr_log_errno(L_ERROR, "Fork failed");
-		close(sock[0]);
-		close(sock[1]);
-		return -1;
-	} else if (pid == 0) {
-		close(sock[0]);
-		communicate(sock[1]);
-		_Exit(0);
-	}
-
-	close(sock[1]);
-	*pid_out = pid;
-	return sock[0];
-}