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#include "sendfd.h"
#ifdef __GLIBC__
ssize_t
write_fd(int fd, void *ptr, size_t nbytes, int sendfd)
{
struct msghdr msg;
struct iovec iov[1];
union {
struct cmsghdr cm;
char control[CMSG_SPACE(sizeof(int))];
} control_un;
struct cmsghdr *cmptr;
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;
*((int *) CMSG_DATA(cmptr)) = sendfd;
msg.msg_name = NULL;
msg.msg_namelen = 0;
iov[0].iov_base = ptr;
iov[0].iov_len = nbytes;
msg.msg_iov = iov;
msg.msg_iovlen = 1;
return(sendmsg(fd, &msg, 0));
}
ssize_t
Write_fd(int fd, void *ptr, size_t nbytes, int sendfd)
{
ssize_t n;
if ( (n = write_fd(fd, ptr, nbytes, sendfd)) < 0)
fprintf(stderr, "write_fd error");
return(n);
}
int sendfd(int sockfd, int fdtosend) {
char sendbuf[2];
Write_fd(sockfd, sendbuf, sizeof(sendbuf), fdtosend);
return 0;
}
#else
int sendfd(int sockfd, int fdtosend) {
struct iovec iov[1];
struct msghdr msg;
iov[0].iov_base = (char *) 0;
iov[0].iov_len = 0;
msg.msg_iov = iov;
msg.msg_iovlen = 1;
msg.msg_name = NULL;
msg.msg_namelen = 0;
/* if sockfd <= 0, we are in a world of jimmy crack corn. - AK */
msg.msg_accrights = (caddr_t) &fdtosend;
msg.msg_accrightslen = sizeof(fdtosend);
Sendmsg(sockfd, &msg, 0);
return 0;
}
#endif
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