/usr/include/funtools/gio.h is in libfuntools-dev 1.4.4+dfsg2-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* Copyright (c) 1999-2003 Smithsonian Astrophysical Observatory
*/
/*
*
* GIO.H -- include file for gio.c
*
*/
#ifndef _gio_h
#if HAVE_CONFIG_H
#include "conf.h"
#endif
#include "xport.h"
#include <stdio.h>
#ifdef HAVE_STRING_H
#include <string.h>
#endif
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#ifdef HAVE_MALLOC_H
#include <malloc.h>
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_SYS_SHM_H
#include <sys/shm.h>
#endif
#ifdef HAVE_SYS_MMAN_H
#include <sys/mman.h>
#endif
#ifdef __STDC__
#include <stdarg.h>
#else
#include <varargs.h>
#endif
#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <sys/time.h>
#include "prsetup.h"
#include "xalloc.h"
/* use ftello/fseeko (assuming its available) if we are using 64-bit offsets */
#if _FILE_OFFSET_BITS == 64
#ifdef USE_FTELLO
#undef USE_FTELLO
#endif
#if HAVE_FTELLO
#define USE_FTELLO 1
#endif
#ifdef USE_FSEEKO
#undef USE_FSEEKO
#endif
#if HAVE_FSEEKO
#define USE_FSEEKO 1
#endif
#endif
/* make sure socklen_t is available, since some systems don't use it */
#ifndef HAVE_SOCKLEN_T
#define socklen_t int
#endif
/* define the types of "file" we can open */
#define GIO_DISK 1
#define GIO_STREAM 2
#define GIO_MEMORY 4
#define GIO_MMAP 8
#define GIO_SHM 16
#define GIO_PIPE 32
#define GIO_SOCKET 64
#define GIO_GZIP 128
/* define the size of the memory buffer increment we allocate */
#define GIO_BUFINC 81920
/* define socket parameters */
#define GIO_RETRIES 6000
#define GIO_MAXLISTEN 1000
#define GIO_TIMEOUT 60
typedef struct {
int type;
char *name;
char *mode;
/* memory types */
char *buf;
off_t len;
off_t cur;
int extend;
/* disk files and streams */
FILE *fp;
int unbuffered;
/* gzip */
void *gz;
/* shared memory */
int shmid;
/* command pipes and sockets */
int pid;
int ifd;
int ofd;
/* cr-delimited files */
char *crbuf;
int crlen;
} *GIO, GIORec, GFile;
_PRbeg
GIO gopen _PRx((char *name, char *mode));
GIO gmemopen _PRx((char *buf, off_t len, char *mode));
void *_gread _PRx((GIO gio, char *buf, size_t size, size_t n, size_t *got));
size_t gread _PRx((GIO gio, char *buf, size_t size, size_t n));
size_t gwrite _PRx((GIO gio, char *buf, size_t size, size_t n));
void *ggets _PRx((GIO gio, char *buf, int len));
int gflush _PRx((GIO gio));
off_t gseek _PRx((GIO gio, off_t offset, int whence));
off_t gtell _PRx((GIO gio));
int gskip _PRx((GIO gio, off_t n));
int ginfo _PRx((GIO gio,
char **name, int *type, off_t *cur, char **buf, int *len));
void gfreebuf _PRx((GIO gio, void *buf));
void gclose _PRx((GIO gio));
int setgerror _PRx((int flag));
char *gerrorstring _PRx((void));
#ifdef __STDC__
int gprintf(GIO gio, char *format, ...);
void gerror(FILE *fd, char *format, ...);
void gwarning(FILE *fd, char *format, ...);
#else
int gprintf();
void gerror();
void gwarning();
#endif
int setgwarning _PRx((int flag));
char *gwarningstring _PRx((void));
void gsleep _PRx((int millisec));
#if USE_FTELLO
off_t ftello _PRx((FILE *stream));
#endif
#if USE_FSEEKO
int fseeko _PRx((FILE *stream, off_t offset, int whence));
#endif
_PRend
#define _gio_h
#endif
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