stdio.c revision e5bf06eedc08179fb93a09799915139370d08055
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrence/*
0e27506ce3135f9bd49e12564ad0e15256135118Automatic Updater * Copyright (C) 2004, 2007, 2011 Internet Systems Consortium, Inc. ("ISC")
499b34cea04a46823d003d4c0520c8b03e8513cbBrian Wellington * Copyright (C) 2000, 2001 Internet Software Consortium.
40f53fa8d9c6a4fc38c0014495e7a42b08f52481David Lawrence *
ec5347e2c775f027573ce5648b910361aa926c01Automatic Updater * Permission to use, copy, modify, and/or distribute this software for any
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrence * purpose with or without fee is hereby granted, provided that the above
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrence * copyright notice and this permission notice appear in all copies.
40f53fa8d9c6a4fc38c0014495e7a42b08f52481David Lawrence *
dafcb997e390efa4423883dafd100c975c4095d6Mark Andrews * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
dafcb997e390efa4423883dafd100c975c4095d6Mark Andrews * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
dafcb997e390efa4423883dafd100c975c4095d6Mark Andrews * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
dafcb997e390efa4423883dafd100c975c4095d6Mark Andrews * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
dafcb997e390efa4423883dafd100c975c4095d6Mark Andrews * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
dafcb997e390efa4423883dafd100c975c4095d6Mark Andrews * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
dafcb997e390efa4423883dafd100c975c4095d6Mark Andrews * PERFORMANCE OF THIS SOFTWARE.
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrence */
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrence
e5bf06eedc08179fb93a09799915139370d08055Evan Hunt/* $Id: stdio.c,v 1.12 2012/02/29 21:28:17 each Exp $ */
9c3531d72aeaad6c5f01efe6a1c82023e1379e4dDavid Lawrence
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrence#include <config.h>
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrence
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrence#include <errno.h>
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrence#include <unistd.h>
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrence
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrence#include <isc/stdio.h>
32babe43eb479d2ae8736f9985a84d1b9d95a33aScott Mann#include <isc/stat.h>
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrence
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrence#include "errno2result.h"
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrence
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrenceisc_result_t
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrenceisc_stdio_open(const char *filename, const char *mode, FILE **fp) {
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrence FILE *f;
40f53fa8d9c6a4fc38c0014495e7a42b08f52481David Lawrence
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrence f = fopen(filename, mode);
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrence if (f == NULL)
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrence return (isc__errno2result(errno));
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrence *fp = f;
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrence return (ISC_R_SUCCESS);
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrence}
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrence
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrenceisc_result_t
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrenceisc_stdio_close(FILE *f) {
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrence int r;
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrence
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrence r = fclose(f);
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrence if (r == 0)
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrence return (ISC_R_SUCCESS);
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrence else
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrence return (isc__errno2result(errno));
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrence}
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrence
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrenceisc_result_t
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrenceisc_stdio_seek(FILE *f, long offset, int whence) {
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrence int r;
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrence
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrence r = fseek(f, offset, whence);
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrence if (r == 0)
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrence return (ISC_R_SUCCESS);
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrence else
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrence return (isc__errno2result(errno));
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrence}
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrence
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrenceisc_result_t
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrenceisc_stdio_read(void *ptr, size_t size, size_t nmemb, FILE *f, size_t *nret) {
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrence isc_result_t result = ISC_R_SUCCESS;
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrence size_t r;
40f53fa8d9c6a4fc38c0014495e7a42b08f52481David Lawrence
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrence clearerr(f);
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrence r = fread(ptr, size, nmemb, f);
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrence if (r != nmemb) {
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrence if (feof(f))
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrence result = ISC_R_EOF;
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrence else
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrence result = isc__errno2result(errno);
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrence }
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrence if (nret != NULL)
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrence *nret = r;
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrence return (result);
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrence}
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrence
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrenceisc_result_t
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrenceisc_stdio_write(const void *ptr, size_t size, size_t nmemb, FILE *f,
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrence size_t *nret)
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrence{
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrence isc_result_t result = ISC_R_SUCCESS;
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrence size_t r;
40f53fa8d9c6a4fc38c0014495e7a42b08f52481David Lawrence
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrence clearerr(f);
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrence r = fwrite(ptr, size, nmemb, f);
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrence if (r != nmemb)
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrence result = isc__errno2result(errno);
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrence if (nret != NULL)
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrence *nret = r;
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrence return (result);
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrence}
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrence
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrenceisc_result_t
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrenceisc_stdio_flush(FILE *f) {
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrence int r;
40f53fa8d9c6a4fc38c0014495e7a42b08f52481David Lawrence
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrence r = fflush(f);
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrence if (r == 0)
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrence return (ISC_R_SUCCESS);
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrence else
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrence return (isc__errno2result(errno));
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrence}
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrence
e5bf06eedc08179fb93a09799915139370d08055Evan Hunt/*
e5bf06eedc08179fb93a09799915139370d08055Evan Hunt * OpenBSD has deprecated ENOTSUP in favor of EOPNOTSUPP.
e5bf06eedc08179fb93a09799915139370d08055Evan Hunt */
e5bf06eedc08179fb93a09799915139370d08055Evan Hunt#if defined(EOPNOTSUPP) && !defined(ENOTSUP)
e5bf06eedc08179fb93a09799915139370d08055Evan Hunt#define ENOTSUP EOPNOTSUPP
e5bf06eedc08179fb93a09799915139370d08055Evan Hunt#endif
e5bf06eedc08179fb93a09799915139370d08055Evan Hunt
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrenceisc_result_t
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrenceisc_stdio_sync(FILE *f) {
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrence int r;
40f53fa8d9c6a4fc38c0014495e7a42b08f52481David Lawrence
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrence r = fsync(fileno(f));
9ddf371552b3554a22632996acc41ef9917a30f4Mark Andrews /*
9ddf371552b3554a22632996acc41ef9917a30f4Mark Andrews * fsync is not supported on sockets and pipes which
9ddf371552b3554a22632996acc41ef9917a30f4Mark Andrews * result in EINVAL / ENOTSUP.
9ddf371552b3554a22632996acc41ef9917a30f4Mark Andrews */
9ddf371552b3554a22632996acc41ef9917a30f4Mark Andrews if (r == 0 || errno == EINVAL || errno == ENOTSUP)
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrence return (ISC_R_SUCCESS);
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrence else
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrence return (isc__errno2result(errno));
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrence}
d8e34837cd6c88c42b3ecdb9107a43ecf8252e79David Lawrence