From 3b9b6d0b8e7f798023c9d109c490449d528fde80 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 17:59:48 +0200 Subject: Adding upstream version 1:9.18.19. Signed-off-by: Daniel Baumann --- lib/isc/stdio.c | 152 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 152 insertions(+) create mode 100644 lib/isc/stdio.c (limited to 'lib/isc/stdio.c') diff --git a/lib/isc/stdio.c b/lib/isc/stdio.c new file mode 100644 index 0000000..12ab678 --- /dev/null +++ b/lib/isc/stdio.c @@ -0,0 +1,152 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * 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 https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#include +#include + +#include +#include +#include + +#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; + + r = fseeko(f, offset, whence); + 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); + + r = ftello(f); + 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 /* if defined(EOPNOTSUPP) && !defined(ENOTSUP) */ + +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)); + } +} -- cgit v1.2.3