/usr/include/wvstreams/wvfdstream.h is in libwvstreams-dev 4.6.1-12~deb9u1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 | /* -*- Mode: C++ -*-
* Worldvisions Weaver Software:
* Copyright (C) 1997-2002 Net Integration Technologies, Inc.
*
* Base class for streams built on Unix file descriptors.
*/
#ifndef __WVFDSTREAM_H
#define __WVFDSTREAM_H
#include "wvstream.h"
/**
* Base class for streams built on Unix file descriptors.
*
* WvFDStream distinguishes between read and write file descriptors
* at creation time. Additionally, the reading and writing halves
* may be independently shut down by calling noread() or nowrite().
*
*/
class WvFdStream : public WvStream
{
protected:
/** The file descriptor for reading. */
int rfd;
/** The file descriptor for writing. */
int wfd;
/** Have we actually shut down the read/write sides? */
bool shutdown_read, shutdown_write;
/**
* Sets the file descriptor for both reading and writing.
* Convenience method.
*/
void setfd(int fd)
{ rfd = wfd = fd; }
public:
/**
* Creates a WvStream from an existing file descriptor.
* "rwfd" is the file descriptor for reading and writing
*/
WvFdStream(int rwfd = -1);
/**
* Creates a WvStream from two existing file descriptors.
*
* The file decriptors may be the same.
*
* "rfd" is the file descriptor for reading
* "wfd" is the file descriptor for writing
*/
WvFdStream(int rfd, int wfd);
/** Destroys the stream and invokes close(). */
virtual ~WvFdStream();
/**
* Returns the Unix file descriptor for reading from this stream.
* Returns: the file descriptor, or -1 if none
*/
int getrfd() const
{ return rfd; }
/**
* Returns the Unix file descriptor for writing to this stream.
* Returns: the file descriptor, or -1 if none
*/
int getwfd() const
{ return wfd; }
/**
* Returns the Unix file descriptor for reading and writing.
*
* Asserts that the file descriptors for reading and writing
* are the same before returning.
*
* Returns: the file descriptor, or -1 if none
*/
int getfd() const
{
assert(rfd == wfd);
return rfd;
}
/** Make the fds on this stream blocking or non-blocking. */
void set_nonblock(bool nonblock);
/** Make the fds on this stream close-on-exec or not. */
void set_close_on_exec(bool close_on_exec);
/***** Overridden members *****/
/**
* Closes the file descriptors.
*
* If it is undesirable for the file descriptors to be closed by
* this stream, duplicate the file descriptors using dup() before
* creating the stream.
*
*/
virtual void close();
virtual bool isok() const;
virtual size_t uread(void *buf, size_t count);
virtual size_t uwrite(const void *buf, size_t count);
virtual void pre_select(SelectInfo &si);
virtual bool post_select(SelectInfo &si);
virtual void maybe_autoclose();
public:
const char *wstype() const { return "WvFdStream"; }
};
typedef WvFdStream WvFDStream;
#endif // __WVFDSTREAM_H
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