整理

Change-Id: Idb5abe8f7aff24c76063c8382da9598ab1e1f79c
2018-07-03 21:57:09 +08:00
parent 8d86788a46
commit c759bbc07f
951 changed files with 3509 additions and 9 deletions
--- a/other_lib/android-shmem/libancillary/fd_send.c
+++ b/other_lib/android-shmem/libancillary/fd_send.c
@@ -0,0 +1,92 @@
+/***************************************************************************
+ * libancillary - black magic on Unix domain sockets
+ * (C) Nicolas George
+ * fd_send.c - sending file descriptors
+ ***************************************************************************/
+
+/*
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * 
+ *  1. Redistributions of source code must retain the above copyright notice,
+ *     this list of conditions and the following disclaimer.
+ *  2. Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in the
+ *     documentation and/or other materials provided with the distribution.
+ *  3. The name of the author may not be used to endorse or promote products
+ *     derived from this software without specific prior written permission.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
+ * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+ * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+ * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _XPG4_2 /* Solaris sucks */
+# define _XPG4_2
+#endif
+
+#include <stdlib.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/uio.h>
+#include <assert.h>
+#if defined(__FreeBSD__)
+# include <sys/param.h> /* FreeBSD sucks */
+#endif
+
+#include "ancillary.h"
+
+int
+ancil_send_fds_with_buffer(int sock, const int *fds, unsigned n_fds, void *buffer)
+{
+    struct msghdr msghdr;
+    char nothing = '!';
+    struct iovec nothing_ptr;
+    struct cmsghdr *cmsg;
+    int i;
+
+    nothing_ptr.iov_base = &nothing;
+    nothing_ptr.iov_len = 1;
+    msghdr.msg_name = NULL;
+    msghdr.msg_namelen = 0;
+    msghdr.msg_iov = &nothing_ptr;
+    msghdr.msg_iovlen = 1;
+    msghdr.msg_flags = 0;
+    msghdr.msg_control = buffer;
+    msghdr.msg_controllen = sizeof(struct cmsghdr) + sizeof(int) * n_fds;
+    cmsg = CMSG_FIRSTHDR(&msghdr);
+    cmsg->cmsg_len = msghdr.msg_controllen;
+    cmsg->cmsg_level = SOL_SOCKET;
+    cmsg->cmsg_type = SCM_RIGHTS;
+    for(i = 0; i < n_fds; i++)
+	((int *)CMSG_DATA(cmsg))[i] = fds[i];
+    return(sendmsg(sock, &msghdr, 0) >= 0 ? 0 : -1);
+}
+
+#ifndef SPARE_SEND_FDS
+int
+ancil_send_fds(int sock, const int *fds, unsigned n_fds)
+{
+    ANCIL_FD_BUFFER(ANCIL_MAX_N_FDS) buffer;
+
+    assert(n_fds <= ANCIL_MAX_N_FDS);
+    return(ancil_send_fds_with_buffer(sock, fds, n_fds, &buffer));
+}
+#endif /* SPARE_SEND_FDS */
+
+#ifndef SPARE_SEND_FD
+int
+ancil_send_fd(int sock, int fd)
+{
+    ANCIL_FD_BUFFER(1) buffer;
+
+    return(ancil_send_fds_with_buffer(sock, &fd, 1, &buffer));
+}
+#endif /* SPARE_SEND_FD */