/usr/include/isc/stdio.h is in libbind-dev 1:9.9.5.dfsg-3ubuntu0.19.
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) 2004-2007, 2013 Internet Systems Consortium, Inc. ("ISC")
* Copyright (C) 2000, 2001 Internet Software Consortium.
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
* OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
/* $Id: stdio.h,v 1.13 2007/06/19 23:47:18 tbox Exp $ */
#ifndef ISC_STDIO_H
#define ISC_STDIO_H 1
/*! \file isc/stdio.h */
/*%
* These functions are wrappers around the corresponding stdio functions.
*
* They return a detailed error code in the form of an an isc_result_t. ANSI C
* does not guarantee that stdio functions set errno, hence these functions
* must use platform dependent methods (e.g., the POSIX errno) to construct the
* error code.
*/
#include <stdio.h>
#include <isc/lang.h>
#include <isc/result.h>
ISC_LANG_BEGINDECLS
/*% Open */
isc_result_t
isc_stdio_open(const char *filename, const char *mode, FILE **fp);
/*% Close */
isc_result_t
isc_stdio_close(FILE *f);
/*% Seek */
isc_result_t
isc_stdio_seek(FILE *f, off_t offset, int whence);
/*% Tell */
isc_result_t
isc_stdio_tell(FILE *f, off_t *offsetp);
/*% Read */
isc_result_t
isc_stdio_read(void *ptr, size_t size, size_t nmemb, FILE *f,
size_t *nret);
/*% Write */
isc_result_t
isc_stdio_write(const void *ptr, size_t size, size_t nmemb, FILE *f,
size_t *nret);
/*% Flush */
isc_result_t
isc_stdio_flush(FILE *f);
isc_result_t
isc_stdio_sync(FILE *f);
/*%<
* Invoke fsync() on the file descriptor underlying an stdio stream, or an
* equivalent system-dependent operation. Note that this function has no
* direct counterpart in the stdio library.
*/
ISC_LANG_ENDDECLS
#endif /* ISC_STDIO_H */
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