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