int
pipe_cloexec_nonblock(int fd[2])
{
#ifdef WIN32
return _pipe(fd, 512, _O_BINARY);
#else
int ret;
#ifdef HAVE_PIPE2
ret = pipe2(fd, O_CLOEXEC|O_NONBLOCK);
if (ret >= 0 || errno != ENOSYS)
return ret;
#endif
ret = pipe(fd);
if (ret >= 0) {
fd_set_cloexec(fd[0], true);
fd_set_cloexec(fd[1], true);
fd_set_nonblock(fd[0]);
fd_set_nonblock(fd[1]);
}
return ret;
#endif
}
int
accept_cloexec_nonblock(int fd, struct sockaddr *address,
size_t *address_length_r)
{
int ret;
socklen_t address_length = *address_length_r;
#ifdef HAVE_ACCEPT4
ret = accept4(fd, address, &address_length,
SOCK_CLOEXEC|SOCK_NONBLOCK);
if (ret >= 0 || errno != ENOSYS) {
if (ret >= 0)
*address_length_r = address_length;
return ret;
}
#endif
ret = accept(fd, address, &address_length);
if (ret >= 0) {
fd_set_cloexec(ret, true);
fd_set_nonblock(ret);
*address_length_r = address_length;
}
return ret;
}
int
socketpair_cloexec(int domain, int type, int protocol, int sv[2])
{
int ret;
#ifdef SOCK_CLOEXEC
ret = socketpair(domain, type | SOCK_CLOEXEC, protocol, sv);
if (ret >= 0 || errno != EINVAL)
return ret;
#endif
ret = socketpair(domain, type, protocol, sv);
if (ret >= 0) {
fd_set_cloexec(sv[0], true);
fd_set_cloexec(sv[1], true);
}
return ret;
}
int
socketpair_cloexec_nonblock(int domain, int type, int protocol, int sv[2])
{
int ret;
#if defined(SOCK_CLOEXEC) && defined(SOCK_NONBLOCK)
ret = socketpair(domain, type | SOCK_CLOEXEC | SOCK_NONBLOCK, protocol,
sv);
if (ret >= 0 || errno != EINVAL)
return ret;
#endif
ret = socketpair(domain, type, protocol, sv);
if (ret >= 0) {
fd_set_cloexec(sv[0], true);
fd_set_nonblock(sv[0]);
fd_set_cloexec(sv[1], true);
fd_set_nonblock(sv[1]);
}
return ret;
}
int
inotify_init_cloexec(void)
{
int fd;
#ifdef HAVE_INOTIFY_INIT1
fd = inotify_init1(IN_CLOEXEC);
if (fd >= 0 || errno != ENOSYS)
return fd;
#endif
fd = inotify_init();
if (fd >= 0)
fd_set_cloexec(fd, true);
return fd;
}
int
socket_cloexec_nonblock(int domain, int type, int protocol)
{
int fd;
#if defined(SOCK_CLOEXEC) && defined(SOCK_NONBLOCK)
fd = socket(domain, type | SOCK_CLOEXEC | SOCK_NONBLOCK, protocol);
if (fd >= 0 || errno != EINVAL)
return fd;
#endif
fd = socket(domain, type, protocol);
if (fd >= 0) {
fd_set_cloexec(fd, true);
fd_set_nonblock(fd);
}
return fd;
}
int
open_cloexec(const char *path_fs, int flags, int mode)
{
int fd;
#ifdef O_CLOEXEC
flags |= O_CLOEXEC;
#endif
#ifdef O_NOCTTY
flags |= O_NOCTTY;
#endif
fd = open(path_fs, flags, mode);
if (fd >= 0)
fd_set_cloexec(fd, true);
return fd;
}
ssize_t
recvmsg_cloexec(int sockfd, struct msghdr *msg, int flags)
{
#ifdef MSG_CMSG_CLOEXEC
flags |= MSG_CMSG_CLOEXEC;
#endif
ssize_t result = recvmsg(sockfd, msg, flags);
if (result >= 0) {
struct cmsghdr *cmsg = CMSG_FIRSTHDR(msg);
while (cmsg != NULL) {
if (cmsg->cmsg_type == SCM_RIGHTS) {
const int *fd_p = (const int *)CMSG_DATA(cmsg);
fd_set_cloexec(*fd_p, true);
}
cmsg = CMSG_NXTHDR(msg, cmsg);
}
}
return result;
}
