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#include <sys/socket.h>
#include <limits.h>
#include <string.h>
#include <errno.h>
#include "syscall.h"
ssize_t sendmsg(int fd, const struct msghdr *msg, int flags)
{
#if LONG_MAX > INT_MAX
struct msghdr h;
/* Kernels before 2.6.38 set SCM_MAX_FD to 255, allocate enough
* space to support an SCM_RIGHTS ancillary message with 255 fds.
* Kernels since 2.6.38 set SCM_MAX_FD to 253. */
struct cmsghdr chbuf[CMSG_SPACE(255*sizeof(int))/sizeof(struct cmsghdr)+1], *c;
if (msg) {
h = *msg;
h.__pad1 = h.__pad2 = 0;
msg = &h;
if (h.msg_controllen) {
if (h.msg_controllen > sizeof chbuf) {
errno = ENOMEM;
return -1;
}
memcpy(chbuf, h.msg_control, h.msg_controllen);
h.msg_control = chbuf;
for (c=CMSG_FIRSTHDR(&h); c; c=CMSG_NXTHDR(&h,c))
c->__pad1 = 0;
}
}
#endif
return socketcall_cp(sendmsg, fd, msg, flags, 0, 0, 0);
}
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