mirror of https://github.com/sudo-project/sudo.git
65 lines
1.9 KiB
C
65 lines
1.9 KiB
C
/* $OpenBSD: strlcpy.c,v 1.12 2015/01/15 03:54:12 millert Exp $ */
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/*
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* SPDX-License-Identifier: ISC
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*
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* Copyright (c) 1998, 2003-2005, 2010-2011, 2013-2015
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* 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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#ifndef HAVE_STRLCPY
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#include <string.h>
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#include <sudo_compat.h>
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/*
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* Copy string src to buffer dst of size dsize. At most dsize-1
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* chars will be copied. Always NUL terminates (unless dsize == 0).
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* Returns strlen(src); if retval >= dsize, truncation occurred.
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*/
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size_t
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sudo_strlcpy(char * restrict dst, const char * restrict src, size_t dsize)
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{
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const char *osrc = src;
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size_t nleft = dsize;
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/* Copy as many bytes as will fit. */
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if (nleft != 0) {
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while (--nleft != 0) {
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if ((*dst++ = *src++) == '\0')
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break;
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}
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}
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/* Not enough room in dst, add NUL and traverse rest of src. */
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if (nleft == 0) {
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if (dsize != 0)
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*dst = '\0'; /* NUL-terminate dst */
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while (*src++)
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continue;
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}
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return((size_t)(src - osrc) - 1); /* count does not include NUL */
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}
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#endif /* HAVE_STRLCPY */
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