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/*
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* Copyright (C) Internet Systems Consortium, Inc. ("ISC")
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* See the COPYRIGHT file distributed with this work for additional
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* information regarding copyright ownership.
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*/
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#include <config.h>
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#include <errno.h>
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#include <unistd.h>
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#include <isc/stdio.h>
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#include <isc/stat.h>
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#include <isc/util.h>
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#include "errno2result.h"
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isc_result_t
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isc_stdio_open(const char *filename, const char *mode, FILE **fp) {
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FILE *f;
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f = fopen(filename, mode);
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if (f == NULL)
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return (isc__errno2result(errno));
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*fp = f;
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return (ISC_R_SUCCESS);
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}
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isc_result_t
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isc_stdio_close(FILE *f) {
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int r;
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r = fclose(f);
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if (r == 0)
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return (ISC_R_SUCCESS);
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else
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return (isc__errno2result(errno));
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}
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isc_result_t
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isc_stdio_seek(FILE *f, off_t offset, int whence) {
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int r;
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#ifdef HAVE_FSEEKO
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r = fseeko(f, offset, whence);
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#else
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r = fseek(f, offset, whence);
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#endif
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if (r == 0)
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return (ISC_R_SUCCESS);
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else
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return (isc__errno2result(errno));
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}
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isc_result_t
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isc_stdio_tell(FILE *f, off_t *offsetp) {
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off_t r;
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REQUIRE(offsetp != NULL);
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#ifdef HAVE_FTELLO
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r = ftello(f);
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#else
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r = ftell(f);
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#endif
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if (r >= 0) {
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*offsetp = r;
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return (ISC_R_SUCCESS);
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} else
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return (isc__errno2result(errno));
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}
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isc_result_t
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isc_stdio_read(void *ptr, size_t size, size_t nmemb, FILE *f, size_t *nret) {
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isc_result_t result = ISC_R_SUCCESS;
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size_t r;
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clearerr(f);
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r = fread(ptr, size, nmemb, f);
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if (r != nmemb) {
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if (feof(f))
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result = ISC_R_EOF;
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else
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result = isc__errno2result(errno);
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}
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if (nret != NULL)
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*nret = r;
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return (result);
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}
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isc_result_t
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isc_stdio_write(const void *ptr, size_t size, size_t nmemb, FILE *f,
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size_t *nret)
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{
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isc_result_t result = ISC_R_SUCCESS;
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size_t r;
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clearerr(f);
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r = fwrite(ptr, size, nmemb, f);
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if (r != nmemb)
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result = isc__errno2result(errno);
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if (nret != NULL)
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*nret = r;
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return (result);
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}
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isc_result_t
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isc_stdio_flush(FILE *f) {
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int r;
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r = fflush(f);
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if (r == 0)
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return (ISC_R_SUCCESS);
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else
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return (isc__errno2result(errno));
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}
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/*
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* OpenBSD has deprecated ENOTSUP in favor of EOPNOTSUPP.
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*/
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#if defined(EOPNOTSUPP) && !defined(ENOTSUP)
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#define ENOTSUP EOPNOTSUPP
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#endif
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isc_result_t
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isc_stdio_sync(FILE *f) {
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struct stat buf;
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int r;
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if (fstat(fileno(f), &buf) != 0)
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return (isc__errno2result(errno));
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/*
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* Only call fsync() on regular files.
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*/
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if ((buf.st_mode & S_IFMT) != S_IFREG)
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return (ISC_R_SUCCESS);
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r = fsync(fileno(f));
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if (r == 0)
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return (ISC_R_SUCCESS);
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else
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return (isc__errno2result(errno));
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}
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isc_result_t
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isc_stdio_fgetc(FILE *f, int *ret) {
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int r;
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isc_result_t result = ISC_R_SUCCESS;
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#if defined(HAVE_FLOCKFILE) && defined(HAVE_GETCUNLOCKED)
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r = fgetc_unlocked(f);
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#else
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r = fgets(f);
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#endif
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if (r == EOF)
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result = ferror(f) ? isc__errno2result(errno) : ISC_R_EOF;
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*ret = r;
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return result;
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}
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