mirror of https://github.com/sudo-project/sudo.git
106 lines
2.5 KiB
C
106 lines
2.5 KiB
C
/*
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* SPDX-License-Identifier: ISC
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*
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* Copyright (c) 2009-2021 Todd C. Miller <Todd.Miller@sudo.ws>
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*
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* Permission to use, copy, modify, and 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 THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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/*
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* This is an open source non-commercial project. Dear PVS-Studio, please check it.
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* PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
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*/
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#include <config.h>
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#include <stdio.h>
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#ifdef HAVE_STDBOOL_H
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# include <stdbool.h>
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#else
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# include <compat/stdbool.h>
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#endif
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#include <string.h>
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#include <errno.h>
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#include <limits.h>
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#include <time.h>
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#include <sudo_compat.h>
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#include <sudo_debug.h>
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#include <sudo_iolog.h>
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/*
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* Write to an I/O log, optionally compressing.
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*/
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ssize_t
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iolog_write(struct iolog_file *iol, const void *buf, size_t len,
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const char **errstr)
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{
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ssize_t ret;
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debug_decl(iolog_write, SUDO_DEBUG_UTIL);
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if (len > UINT_MAX || len > SSIZE_MAX) { // -V590
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errno = EINVAL;
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if (errstr != NULL)
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*errstr = strerror(errno);
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debug_return_ssize_t(-1);
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}
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#ifdef HAVE_ZLIB_H
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if (iol->compressed) {
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int errnum;
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ret = gzwrite(iol->fd.g, buf, (unsigned int)len);
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if (ret == 0) {
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ret = -1;
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if (errstr != NULL) {
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*errstr = gzerror(iol->fd.g, &errnum);
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if (errnum == Z_ERRNO)
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*errstr = strerror(errno);
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}
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goto done;
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}
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if (iolog_get_flush()) {
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if (gzflush(iol->fd.g, Z_SYNC_FLUSH) != Z_OK) {
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ret = -1;
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if (errstr != NULL) {
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*errstr = gzerror(iol->fd.g, &errnum);
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if (errnum == Z_ERRNO)
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*errstr = strerror(errno);
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}
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goto done;
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}
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}
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} else
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#endif
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{
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ret = (ssize_t)fwrite(buf, 1, len, iol->fd.f);
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if (ret <= 0) {
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ret = -1;
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if (errstr != NULL)
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*errstr = strerror(errno);
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goto done;
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}
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if (iolog_get_flush()) {
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if (fflush(iol->fd.f) != 0) {
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ret = -1;
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if (errstr != NULL)
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*errstr = strerror(errno);
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goto done;
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}
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}
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}
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done:
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debug_return_ssize_t(ret);
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}
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