/* $NetBSD: stdio.c,v 1.2.4.2 2024/02/29 12:35:04 martin Exp $ */ /* * 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)); } }