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priv-io.h
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/* priv-io.h - Interface to the private I/O functions.
Copyright (C) 2000 Werner Koch (dd9jn)
Copyright (C) 2001, 2002, 2003, 2004, 2005 g10 Code GmbH
This file is part of GPGME.
GPGME is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as
published by the Free Software Foundation; either version 2.1 of
the License, or (at your option) any later version.
GPGME is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
02111-1307, USA. */
#ifndef IO_H
#define IO_H
/* A single file descriptor passed to spawn. For child fds, dup_to
specifies the fd it should become in the child. */
struct spawn_fd_item_s
{
int fd;
int dup_to;
};
struct io_select_fd_s
{
int fd;
int for_read;
int for_write;
int signaled;
void *opaque;
};
/* These function are either defined in posix-io.c or w32-io.c. */
void _gpgme_io_subsystem_init (void);
int _gpgme_io_read (int fd, void *buffer, size_t count);
int _gpgme_io_write (int fd, const void *buffer, size_t count);
int _gpgme_io_pipe (int filedes[2], int inherit_idx);
int _gpgme_io_close (int fd);
typedef void (*_gpgme_close_notify_handler_t) (int,void*);
int _gpgme_io_set_close_notify (int fd, _gpgme_close_notify_handler_t handler,
void *value);
int _gpgme_io_set_nonblocking (int fd);
/* Spawn the executable PATH with ARGV as arguments, after forking
close all fds in FD_PARENT_LIST in the parent and close or dup all
fds in FD_CHILD_LIST in the child. */
int _gpgme_io_spawn (const char *path, char **argv,
struct spawn_fd_item_s *fd_child_list,
struct spawn_fd_item_s *fd_parent_list);
int _gpgme_io_select (struct io_select_fd_s *fds, size_t nfds, int nonblock);
/* Write the printable version of FD to the buffer BUF of length
BUFLEN. The printable version is the representation on the command
line that the child process expects. */
int _gpgme_io_fd2str (char *buf, int buflen, int fd);
/* Duplicate a file descriptor. This is more restrictive than dup():
it assumes that the resulting file descriptors are essentially
co-equal (for example, no private offset), which is true for pipes
and sockets (but not files) under Unix with the standard dup()
function. Basically, this function is used to reference count the
status output file descriptor shared between GPGME and libassuan
(in engine-gpgsm.c). */
int _gpgme_io_dup (int fd);
#endif /* IO_H */

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