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/* ISC license. */
#include <skalibs/sysdeps.h>
#include <skalibs/nonposix.h>
#include <sys/socket.h>
#include <sys/uio.h>
#include <errno.h>
#include <bcnm/wpactrl.h>
#include "wpactrl-internal.h"
ssize_t wpactrl_fd_recv (int fd, char *s, size_t len)
{
static int const bsd_braindeadness_workaround_flags =
#ifdef SKALIBS_HASMSGDONTWAIT
MSG_DONTWAIT
#else
0
#endif
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#ifdef SKALIBS_HASNBWAITALL
MSG_WAITALL
#else
0
#endif
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#ifdef SKALIBS_HASCMSGCLOEXEC
MSG_CMSG_CLOEXEC
#else
0
#endif
;
struct iovec iov = { .iov_base = s, .iov_len = len } ;
struct msghdr msghdr =
{
.msg_name = 0,
.msg_namelen = 0,
.msg_iov = &iov,
.msg_iovlen = 1,
.msg_flags = 0,
.msg_control = 0,
.msg_controllen = 0
} ;
ssize_t r ;
do r = recvmsg(fd, &msghdr, bsd_braindeadness_workaround_flags) ;
while (r == -1 && errno == EINTR) ;
return r > 0 && msghdr.msg_flags | MSG_TRUNC ? (errno = EMSGSIZE, -1) : r ;
}
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