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Code

smbd: Use msghdr_prep_fds in vfs_aio_fork

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Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
This commit is contained in:
Volker Lendecke 2014-12-31 13:03:24 +01:00 committed by Jeremy Allison
parent bd9b59ae28
commit 9bd7e52db0
1 changed files with 9 additions and 30 deletions
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39
source3/modules/vfs_aio_fork.c
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@ -28,6 +28,7 @@
#include "lib/util/tevent_unix.h"
#include "lib/sys_rw.h"
#include "lib/sys_rw_data.h"
#include "lib/msghdr.h"
#if !defined(HAVE_STRUCT_MSGHDR_MSG_CONTROL) && !defined(HAVE_STRUCT_MSGHDR_MSG_ACCRIGHTS)
# error Can not pass file descriptors
@ -220,40 +221,18 @@ static ssize_t read_fd(int fd, void *ptr, size_t nbytes, int *recvfd)
static ssize_t write_fd(int fd, void *ptr, size_t nbytes, int sendfd)
{
struct msghdr msg;
struct iovec iov[1];
#ifdef HAVE_STRUCT_MSGHDR_MSG_CONTROL
union {
struct cmsghdr cm;
char control[CMSG_SPACE(sizeof(int))];
} control_un;
struct cmsghdr *cmptr;
ZERO_STRUCT(msg);
ZERO_STRUCT(control_un);
msg.msg_control = control_un.control;
msg.msg_controllen = sizeof(control_un.control);
cmptr = CMSG_FIRSTHDR(&msg);
cmptr->cmsg_len = CMSG_LEN(sizeof(int));
cmptr->cmsg_level = SOL_SOCKET;
cmptr->cmsg_type = SCM_RIGHTS;
memcpy(CMSG_DATA(cmptr), &sendfd, sizeof(sendfd));
#else
ZERO_STRUCT(msg);
msg.msg_accrights = (caddr_t) &sendfd;
msg.msg_accrightslen = sizeof(int);
#endif
struct msghdr msg;
size_t bufsize = msghdr_prep_fds(NULL, NULL, 0, &sendfd, 1);
uint8_t buf[bufsize];
struct iovec iov;
msghdr_prep_fds(&msg, buf, bufsize, &sendfd, 1);
msg.msg_name = NULL;
msg.msg_namelen = 0;
ZERO_STRUCT(iov);
iov[0].iov_base = (void *)ptr;
iov[0].iov_len = nbytes;
msg.msg_iov = iov;
iov.iov_base = (void *)ptr;
iov.iov_len = nbytes;
msg.msg_iov = &iov;
msg.msg_iovlen = 1;
return (sendmsg(fd, &msg, 0));