130 lines
2.7 KiB
C
130 lines
2.7 KiB
C
/*
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* Copyright (C) 2004, 2007, 2011, 2012 Internet Systems Consortium, Inc. ("ISC")
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* Copyright (C) 2000, 2001 Internet Software Consortium.
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
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* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
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* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
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* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
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* OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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* PERFORMANCE OF THIS SOFTWARE.
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*/
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/* $Id$ */
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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 "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, long offset, int whence) {
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int r;
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r = fseek(f, offset, whence);
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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_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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int r;
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r = fsync(fileno(f));
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/*
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* fsync is not supported on sockets and pipes which
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* result in EINVAL / ENOTSUP.
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*/
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if (r == 0 || errno == EINVAL || errno == ENOTSUP)
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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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