/* * SPDX-License-Identifier: ISC * * Copyright (c) 2009-2021 Todd C. Miller * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ /* * This is an open source non-commercial project. Dear PVS-Studio, please check it. * PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com */ #include #include #ifdef HAVE_STDBOOL_H # include #else # include "compat/stdbool.h" #endif #include #include #include #include #include "sudo_compat.h" #include "sudo_debug.h" #include "sudo_iolog.h" /* * Write to an I/O log, optionally compressing. */ ssize_t iolog_write(struct iolog_file *iol, const void *buf, size_t len, const char **errstr) { ssize_t ret; debug_decl(iolog_write, SUDO_DEBUG_UTIL); if (len > UINT_MAX) { errno = EINVAL; if (errstr != NULL) *errstr = strerror(errno); debug_return_ssize_t(-1); } #ifdef HAVE_ZLIB_H if (iol->compressed) { int errnum; ret = gzwrite(iol->fd.g, (const voidp)buf, len); if (ret == 0) { ret = -1; if (errstr != NULL) { *errstr = gzerror(iol->fd.g, &errnum); if (errnum == Z_ERRNO) *errstr = strerror(errno); } goto done; } if (iolog_get_flush()) { if (gzflush(iol->fd.g, Z_SYNC_FLUSH) != Z_OK) { ret = -1; if (errstr != NULL) { *errstr = gzerror(iol->fd.g, &errnum); if (errnum == Z_ERRNO) *errstr = strerror(errno); } goto done; } } } else #endif { ret = fwrite(buf, 1, len, iol->fd.f); if (ret == 0) { ret = -1; if (errstr != NULL) *errstr = strerror(errno); goto done; } if (iolog_get_flush()) { if (fflush(iol->fd.f) != 0) { ret = -1; if (errstr != NULL) *errstr = strerror(errno); goto done; } } } done: debug_return_ssize_t(ret); }