int
close(int fd)
{
int ret;
/* This is a cancelation point: */
_thread_enter_cancellation_point();
if ((fd < 0) || (fd >= _thread_max_fdtsize) ||
(fd == _thread_kern_pipe[0]) || (fd == _thread_kern_pipe[1])) {
errno = EBADF;
ret = -1;
} else if ((ret = _FD_LOCK(fd, FD_RDWR_CLOSE, NULL)) != -1) {
/*
* We need to hold the entry spinlock till after
* _thread_sys_close() to stop races caused by the
* fd state transition.
*/
_SPINLOCK(&_thread_fd_table[fd]->lock);
_thread_fd_entry_close(fd);
/* Close the file descriptor: */
ret = _thread_sys_close(fd);
_SPINUNLOCK(&_thread_fd_table[fd]->lock);
_FD_UNLOCK(fd, FD_RDWR_CLOSE);
}
/* No longer in a cancellation point: */
_thread_leave_cancellation_point();
return (ret);
}
int
_dup(int fd)
{
int ret;
/* Lock the file descriptor: */
if ((ret = _FD_LOCK(fd, FD_RDWR, NULL)) == 0) {
/* Perform the 'dup' syscall: */
if ((ret = __sys_dup(fd)) < 0) {
}
/* Initialise the file descriptor table entry: */
else if (_thread_fd_table_init(ret) != 0) {
/* Quietly close the file: */
__sys_close(ret);
/* Reset the file descriptor: */
ret = -1;
} else {
/*
* Save the file open flags so that they can be
* checked later:
*/
_thread_fd_setflags(ret, _thread_fd_getflags(fd));
}
/* Unlock the file descriptor: */
_FD_UNLOCK(fd, FD_RDWR);
}
/* Return the completion status: */
return (ret);
}
ssize_t
_sendmsg(int fd, const struct msghdr *msg, int flags)
{
struct pthread *curthread = _get_curthread();
int ret;
if ((ret = _FD_LOCK(fd, FD_WRITE, NULL)) == 0) {
while ((ret = __sys_sendmsg(fd, msg, flags)) < 0) {
if (!(_thread_fd_getflags(fd) & O_NONBLOCK)
&& ((errno == EWOULDBLOCK) || (errno == EAGAIN))) {
curthread->data.fd.fd = fd;
/* Set the timeout: */
_thread_kern_set_timeout(NULL);
curthread->interrupted = 0;
_thread_kern_sched_state(PS_FDW_WAIT, __FILE__, __LINE__);
/* Check if the operation was interrupted: */
if (curthread->interrupted) {
errno = EINTR;
ret = -1;
break;
}
} else {
ret = -1;
break;
}
}
_FD_UNLOCK(fd, FD_WRITE);
}
return (ret);
}
int
ioctl(int fd, unsigned long request,...)
{
int ret;
int *op;
va_list ap;
/* Lock the file descriptor: */
if ((ret = _FD_LOCK(fd, FD_RDWR, NULL)) == 0) {
/* Initialise the variable argument list: */
va_start(ap, request);
switch( request) {
case FIONBIO:
/*
* descriptors must be non-blocking; we are only
* twiddling the flag based on the request
*/
op = va_arg(ap, int *);
_thread_fd_table[fd]->status_flags->flags &= ~O_NONBLOCK;
_thread_fd_table[fd]->status_flags->flags |= ((*op) ? O_NONBLOCK : 0);
ret = 0;
break;
default:
ret = _thread_sys_ioctl(fd, request, va_arg(ap, char *));
break;
}
/* Free variable arguments: */
va_end(ap);
/* Unlock the file descriptor: */
_FD_UNLOCK(fd, FD_RDWR);
}
int
_getdirentries(int fd, char *buf, int nbytes, long *basep)
{
int ret;
if ((ret = _FD_LOCK(fd, FD_RDWR, NULL)) == 0) {
ret = __sys_getdirentries(fd, buf, nbytes, basep);
_FD_UNLOCK(fd, FD_RDWR);
}
return (ret);
}
int
_fchownat(int fd, const char *path, uid_t owner, gid_t group, int flags)
{
int ret;
if ((ret = _FD_LOCK(fd, FD_READ, NULL)) == 0) {
ret = __sys_fchownat(fd, path, owner, group, flags);
_FD_UNLOCK(fd, FD_READ);
}
return (ret);
}
int
_getsockname(int s, struct sockaddr * name, socklen_t *namelen)
{
int ret;
if ((ret = _FD_LOCK(s, FD_READ, NULL)) == 0) {
ret = __sys_getsockname(s, name, namelen);
_FD_UNLOCK(s, FD_READ);
}
return ret;
}
int
_getpeername(int fd, struct sockaddr * peer, socklen_t *paddrlen)
{
int ret;
if ((ret = _FD_LOCK(fd, FD_READ, NULL)) == 0) {
ret = __sys_getpeername(fd, peer, paddrlen);
_FD_UNLOCK(fd, FD_READ);
}
return ret;
}
int
_listen(int fd, int backlog)
{
int ret;
if ((ret = _FD_LOCK(fd, FD_RDWR, NULL)) == 0) {
ret = __sys_listen(fd, backlog);
_FD_UNLOCK(fd, FD_RDWR);
}
return (ret);
}
int
bind(int fd, const struct sockaddr * name, socklen_t namelen)
{
int ret;
if ((ret = _FD_LOCK(fd, FD_RDWR, NULL)) == 0) {
ret = _thread_sys_bind(fd, name, namelen);
_FD_UNLOCK(fd, FD_RDWR);
}
return (ret);
}
int
fchown(int fd, uid_t owner, gid_t group)
{
int ret;
if ((ret = _FD_LOCK(fd, FD_WRITE, NULL)) == 0) {
ret = _thread_sys_fchown(fd, owner, group);
_FD_UNLOCK(fd, FD_WRITE);
}
return (ret);
}
int
_fchmod(int fd, mode_t mode)
{
int ret;
if ((ret = _FD_LOCK(fd, FD_WRITE, NULL)) == 0) {
ret = __sys_fchmod(fd, mode);
_FD_UNLOCK(fd, FD_WRITE);
}
return (ret);
}
int
___acl_aclcheck_fd(int fd, acl_type_t tp, acl_t acl)
{
int error;
if ((error = _FD_LOCK(fd, FD_READ, NULL)) == 0) {
error = __sys___acl_aclcheck_fd(fd, tp, (struct acl *)acl);
_FD_UNLOCK(fd, FD_READ);
}
return (error);
}
int
_faccessat(int fd, const char *path, int mode, int flags)
{
int ret;
if ((ret = _FD_LOCK(fd, FD_READ, NULL)) == 0) {
ret = __sys_faccessat(fd, path, mode, flags);
_FD_UNLOCK(fd, FD_READ);
}
return (ret);
}
int
_flock(int fd, int operation)
{
int ret;
if ((ret = _FD_LOCK(fd, FD_RDWR, NULL)) == 0) {
ret = __sys_flock(fd, operation);
_FD_UNLOCK(fd, FD_RDWR);
}
return (ret);
}
int
_fchflags(int fd, u_long flags)
{
int ret;
if ((ret = _FD_LOCK(fd, FD_WRITE, NULL)) == 0) {
ret = __sys_fchflags(fd, flags);
_FD_UNLOCK(fd, FD_WRITE);
}
return (ret);
}
long
fpathconf(int fd, int name)
{
long ret;
if ((ret = _FD_LOCK(fd, FD_READ, NULL)) == 0) {
ret = _thread_sys_fpathconf(fd, name);
_FD_UNLOCK(fd, FD_READ);
}
return (ret);
}
int
fchflags(int fd, unsigned int flags)
{
int ret;
if ((ret = _FD_LOCK(fd, FD_WRITE, NULL)) == 0) {
ret = _thread_sys_fchflags(fd, flags);
_FD_UNLOCK(fd, FD_WRITE);
}
return (ret);
}
ssize_t
recvfrom(int fd, void *buf, size_t len, int flags, struct sockaddr * from, socklen_t *from_len)
{
struct pthread *curthread = _get_curthread();
ssize_t ret;
/* This is a cancellation point: */
_thread_enter_cancellation_point();
if ((ret = _FD_LOCK(fd, FD_READ, NULL)) == 0) {
while ((ret = _thread_sys_recvfrom(fd, buf, len, flags, from, from_len)) < 0) {
if (!(_thread_fd_table[fd]->status_flags->flags & O_NONBLOCK) &&
!(flags & MSG_DONTWAIT) &&
((errno == EWOULDBLOCK) || (errno == EAGAIN))) {
curthread->data.fd.fd = fd;
/* Set the timeout: */
_thread_kern_set_timeout(_FD_RCVTIMEO(fd));
curthread->interrupted = 0;
curthread->closing_fd = 0;
curthread->timeout = 0;
_thread_kern_sched_state(PS_FDR_WAIT, __FILE__, __LINE__);
/* Check if the wait was interrupted: */
if (curthread->interrupted) {
/* Return an error status: */
errno = EINTR;
ret = -1;
break;
} else if (curthread->closing_fd) {
/* Return an error status: */
errno = EBADF;
ret = -1;
break;
} else if (curthread->timeout) {
/* Return an error status: */
errno = EWOULDBLOCK;
ret = -1;
break;
}
} else {
ret = -1;
break;
}
}
_FD_UNLOCK(fd, FD_READ);
}
/* No longer in a cancellation point: */
_thread_leave_cancellation_point();
return (ret);
}
int
_getsockopt(int fd, int level, int optname, void *optval, socklen_t
*optlen)
{
int ret;
if ((ret = _FD_LOCK(fd, FD_RDWR, NULL)) == 0) {
ret = __sys_getsockopt(fd, level, optname, optval, optlen);
_FD_UNLOCK(fd, FD_RDWR);
}
return ret;
}
/*
* This function provides 64-bit offset padding that
* is not supplied by GCC 1.X but is supplied by GCC 2.X.
*/
int
ftruncate(int fd, off_t length)
{
int retval;
if (_FD_LOCK(fd, FD_RDWR, NULL) != 0) {
retval = -1;
} else {
retval = __syscall((quad_t)SYS_ftruncate, fd, 0, length);
_FD_UNLOCK(fd, FD_RDWR);
}
return retval;
}
int
_fstatfs(int fd, struct statfs * buf)
{
int ret;
/* Lock the file descriptor for read: */
if ((ret = _FD_LOCK(fd, FD_READ, NULL)) == 0) {
/* Get the file system status: */
ret = __sys_fstatfs(fd, buf);
/* Unlock the file descriptor: */
_FD_UNLOCK(fd, FD_READ);
}
return (ret);
}
int
dup(int fd)
{
int ret;
ret = _FD_LOCK(fd, FD_RDWR, NULL);
if (ret == 0) {
ret = _thread_sys_dup(fd);
if (ret != -1) {
if (_thread_fd_table_init(ret, FD_INIT_DUP,
_thread_fd_table[fd]->status_flags) == -1) {
_thread_sys_close(ret);
ret = -1;
}
}
_FD_UNLOCK(fd, FD_RDWR);
}
return (ret);
}
ssize_t
read(int fd, void *buf, size_t nbytes)
{
struct pthread *curthread = _get_curthread();
ssize_t ret;
int type;
/* This is a cancellation point: */
_thread_enter_cancellation_point();
/* POSIX says to do just this: */
if (nbytes == 0)
ret = 0;
/* Lock the file descriptor for read: */
else if ((ret = _FD_LOCK(fd, FD_READ, NULL)) == 0) {
/* Get the read/write mode type: */
type = _thread_fd_table[fd]->status_flags->flags & O_ACCMODE;
/* Check if the file is not open for read: */
if (type != O_RDONLY && type != O_RDWR) {
/* File is not open for read: */
errno = EBADF;
ret = -1;
}
/* Perform a non-blocking read syscall: */
else while ((ret = _thread_sys_read(fd, buf, nbytes)) < 0) {
if ((_thread_fd_table[fd]->status_flags->flags & O_NONBLOCK) == 0 &&
(errno == EWOULDBLOCK || errno == EAGAIN)) {
curthread->data.fd.fd = fd;
_thread_kern_set_timeout(NULL);
/* Reset the interrupted operation flag: */
curthread->interrupted = 0;
curthread->closing_fd = 0;
_thread_kern_sched_state(PS_FDR_WAIT,
__FILE__, __LINE__);
/*
* Check if the operation was
* interrupted by a signal or
* a closing fd.
*/
if (curthread->interrupted) {
errno = EINTR;
ret = -1;
break;
} else if (curthread->closing_fd) {
errno = EBADF;
ret = -1;
break;
}
} else {
break;
}
}
_FD_UNLOCK(fd, FD_READ);
}
/* No longer in a cancellation point: */
_thread_leave_cancellation_point();
return (ret);
}
int
connect(int fd, const struct sockaddr * name, socklen_t namelen)
{
struct pthread *curthread = _get_curthread();
struct sockaddr tmpname;
socklen_t errnolen, tmpnamelen;
int ret;
/* This is a cancellation point: */
_thread_enter_cancellation_point();
if ((ret = _FD_LOCK(fd, FD_RDWR, NULL)) == 0) {
if ((ret = _thread_sys_connect(fd, name, namelen)) < 0) {
if (!(_thread_fd_table[fd]->status_flags->flags & O_NONBLOCK) &&
((errno == EWOULDBLOCK) || (errno == EINPROGRESS) ||
(errno == EALREADY) || (errno == EAGAIN))) {
curthread->data.fd.fd = fd;
/* Reset the interrupted operation flag: */
curthread->interrupted = 0;
curthread->closing_fd = 0;
/* Set the timeout: */
_thread_kern_set_timeout(NULL);
_thread_kern_sched_state(PS_FDW_WAIT, __FILE__, __LINE__);
/*
* Check if the operation was
* interrupted by a signal or
* a closing fd.
*/
if (curthread->interrupted) {
errno = EINTR;
ret = -1;
} else if (curthread->closing_fd) {
errno = EBADF;
ret = -1;
} else {
tmpnamelen = sizeof(tmpname);
/* 0 now lets see if it really worked */
if (((ret = _thread_sys_getpeername(fd, &tmpname, &tmpnamelen)) < 0) &&
(errno == ENOTCONN)) {
/*
* Get the error, this function
* should not fail
*/
errnolen = sizeof(errno);
_thread_sys_getsockopt(fd, SOL_SOCKET, SO_ERROR, &errno, &errnolen);
}
}
} else {
ret = -1;
}
}
_FD_UNLOCK(fd, FD_RDWR);
}
/* No longer in a cancellation point: */
_thread_leave_cancellation_point();
return (ret);
}
ssize_t
writev(int fd, const struct iovec * iov, int iovcnt)
{
struct pthread *curthread = _get_curthread();
int blocking;
int idx = 0;
int type;
ssize_t num = 0;
size_t cnt;
ssize_t n;
ssize_t ret;
struct iovec liov[20];
struct iovec *p_iov = liov;
/* This is a cancellation point: */
_thread_enter_cancellation_point();
/* Check if the array size exceeds to compiled in size: */
if (iovcnt > (int) (sizeof(liov) / sizeof(struct iovec))) {
/* Allocate memory for the local array: */
if ((p_iov = (struct iovec *)
malloc((size_t)iovcnt * sizeof(struct iovec))) == NULL) {
/* Insufficient memory: */
errno = ENOMEM;
_thread_leave_cancellation_point();
return (-1);
}
} else if (iovcnt <= 0) {
errno = EINVAL;
_thread_leave_cancellation_point();
return (-1);
}
/* Copy the caller's array so that it can be modified locally: */
memcpy(p_iov,iov,(size_t)iovcnt * sizeof(struct iovec));
/* Lock the file descriptor for write: */
if ((ret = _FD_LOCK(fd, FD_WRITE, NULL)) == 0) {
/* Get the read/write mode type: */
type = _thread_fd_table[fd]->status_flags->flags & O_ACCMODE;
/* Check if the file is not open for write: */
if (type != O_WRONLY && type != O_RDWR) {
/* File is not open for write: */
errno = EBADF;
_FD_UNLOCK(fd, FD_WRITE);
if (p_iov != liov)
free(p_iov);
_thread_leave_cancellation_point();
return (-1);
}
/* Check if file operations are to block */
blocking = ((_thread_fd_table[fd]->status_flags->flags & O_NONBLOCK) == 0);
/*
* Loop while no error occurs and until the expected number
* of bytes are written if performing a blocking write:
*/
while (ret == 0) {
/* Perform a non-blocking write syscall: */
n = _thread_sys_writev(fd, &p_iov[idx], iovcnt - idx);
/* Check if one or more bytes were written: */
if (n > 0) {
/*
* Keep a count of the number of bytes
* written:
*/
num += n;
/*
* Enter a loop to check if a short write
* occurred and move the index to the
* array entry where the short write
* ended:
*/
cnt = (size_t)n;
while (cnt > 0 && idx < iovcnt) {
/*
* If the residual count exceeds
* the size of this vector, then
* it was completely written:
*/
if (cnt >= p_iov[idx].iov_len)
/*
* Decrement the residual
* count and increment the
* index to the next array
* entry:
*/
cnt -= p_iov[idx++].iov_len;
else {
/*
* This entry was only
* partially written, so
* adjust it's length
* and base pointer ready
* for the next write:
*/
p_iov[idx].iov_len -= cnt;
p_iov[idx].iov_base =
(char *)p_iov[idx].iov_base
+ (ptrdiff_t)cnt;
cnt = 0;
}
}
} else if (n == 0) {
/*
* Avoid an infinite loop if the last iov_len is
* 0.
*/
while (idx < iovcnt && p_iov[idx].iov_len == 0)
idx++;
if (idx == iovcnt) {
ret = num;
break;
}
}
/*
* If performing a blocking write, check if the
* write would have blocked or if some bytes
* were written but there are still more to
* write:
*/
if (blocking && ((n < 0 && (errno == EWOULDBLOCK ||
errno == EAGAIN)) || (n >= 0 && idx < iovcnt))) {
curthread->data.fd.fd = fd;
_thread_kern_set_timeout(NULL);
/* Reset the interrupted operation flag: */
curthread->interrupted = 0;
curthread->closing_fd = 0;
_thread_kern_sched_state(PS_FDW_WAIT,
__FILE__, __LINE__);
/*
* Check if the operation was
* interrupted by a signal
*/
if (curthread->interrupted || curthread->closing_fd) {
if (num > 0) {
/* Return partial success: */
ret = num;
} else {
/* Return an error: */
if (curthread->closing_fd)
errno = EBADF;
else
errno = EINTR;
ret = -1;
}
}
/*
* If performing a non-blocking write,
* just return whatever the write syscall did:
*/
} else if (!blocking) {
/* A non-blocking call might return zero: */
ret = n;
break;
/*
* If there was an error, return partial success
* (if any bytes were written) or else the error:
*/
} else if (n < 0) {
if (num > 0)
ret = num;
else
ret = n;
/* Check if the write has completed: */
} else if (idx == iovcnt)
/* Return the number of bytes written: */
ret = num;
}
_FD_UNLOCK(fd, FD_WRITE);
}
/* If memory was allocated for the array, free it: */
if (p_iov != liov)
free(p_iov);
/* No longer in a cancellation point: */
_thread_leave_cancellation_point();
return (ret);
}
int
closefrom(int fd)
{
int ret = 0;
int safe_fd;
int lock_fd;
int *flags;
_thread_enter_cancellation_point();
if (fd < 0 || fd >= _thread_max_fdtsize) {
errno = EBADF;
ret = -1;
} else {
safe_fd = _thread_kern_pipe[0] > _thread_kern_pipe[1] ?
_thread_kern_pipe[0] : _thread_kern_pipe[1];
/*
* close individual files until we get past the pipe
* fds. Attempting to close a pipe fd is a no-op.
*/
for (safe_fd++; fd < safe_fd; fd++)
close(fd);
flags = calloc((size_t)_thread_max_fdtsize, sizeof *flags);
if (flags == NULL) {
/* use calloc errno */
ret = -1;
} else {
/* Lock and record all fd entries */
for (lock_fd = fd; lock_fd < _thread_max_fdtsize; lock_fd++) {
if (_thread_fd_table[lock_fd] != NULL &&
_thread_fd_table[lock_fd]->state != FD_ENTRY_CLOSED) {
ret = _FD_LOCK(lock_fd, FD_RDWR_CLOSE, NULL);
if (ret != -1)
flags[lock_fd] = 1;
else
break;
}
}
if (ret != -1) {
/*
* Close the entries and reset the non-bocking
* flag when needed.
*/
for (lock_fd = fd; lock_fd < _thread_max_fdtsize; lock_fd++) {
if (flags[lock_fd] != 0) {
_thread_fd_entry_close(lock_fd);
}
}
/*
* Now let the system do its thing. It is not practical
* to try to prevent races with other threads that can
* create new file descriptors. We just have to assume
* the application is well behaved when using closefrom.
*/
ret = _thread_sys_closefrom(fd);
}
/*
* Unlock any locked entries.
*/
for (lock_fd = fd; lock_fd < _thread_max_fdtsize; lock_fd++) {
if (flags[lock_fd] != 0) {
_FD_UNLOCK(lock_fd, FD_RDWR_CLOSE);
}
}
free(flags);
}
}
_thread_leave_cancellation_point();
return (ret);
}
int
accept(int fd, struct sockaddr * name, socklen_t *namelen)
{
struct pthread *curthread = _get_curthread();
int ret;
int newfd;
enum fd_entry_mode init_mode;
/* This is a cancellation point: */
_thread_enter_cancellation_point();
/* Lock the file descriptor: */
if ((ret = _FD_LOCK(fd, FD_RDWR, NULL)) == 0) {
/* Enter a loop to wait for a connection request: */
while ((ret = _thread_sys_accept(fd, name, namelen)) < 0) {
/* Check if the socket is to block: */
if ((_thread_fd_table[fd]->status_flags->flags & O_NONBLOCK) == 0 &&
(errno == EWOULDBLOCK || errno == EAGAIN)) {
/* Save the socket file descriptor: */
curthread->data.fd.fd = fd;
curthread->data.fd.fname = __FILE__;
curthread->data.fd.branch = __LINE__;
/* Set the timeout: */
_thread_kern_set_timeout(NULL);
curthread->interrupted = 0;
curthread->closing_fd = 0;
/* Schedule the next thread: */
_thread_kern_sched_state(PS_FDR_WAIT, __FILE__,
__LINE__);
/* Check if the wait was interrupted: */
if (curthread->interrupted) {
/* Return an error status: */
errno = EINTR;
ret = -1;
break;
} else if (curthread->closing_fd) {
/* Return an error status: */
errno = EBADF;
ret = -1;
break;
}
} else {
/*
* Another error has occurred, so exit the
* loop here:
*/
break;
}
}
/*
* If no errors initialize the file descriptor table
* for the new socket. If the client's view of the
* status_flags for fd is blocking, then force newfd
* to be viewed as blocking too.
*/
if (ret != -1) {
newfd = ret;
if ((_thread_fd_table[fd]->status_flags->flags & O_NONBLOCK) == 0)
init_mode = FD_INIT_BLOCKING;
else
init_mode = FD_INIT_NEW;
if((ret = _thread_fd_table_init(newfd, init_mode, NULL)) != -1)
ret = newfd;
else {
/* quitely close the fd */
_thread_sys_close(ret);
}
}
/* Unlock the file descriptor: */
_FD_UNLOCK(fd, FD_RDWR);
}
/* No longer in a cancellation point: */
_thread_leave_cancellation_point();
/* Return the socket file descriptor or -1 on error: */
return (ret);
}
