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/*
* SPDX-License-Identifier: ISC
*
* Copyright (c) 2021 Todd C. Miller <Todd.Miller@sudo.ws>
*
* 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 <config.h>
#include <sys/types.h>
#include <stdio.h>
#include <ctype.h>
#include <sudoers.h>
/*
* Like strlcpy() but collapses non-space chars escaped with a backslash.
*/
size_t
strlcpy_unescape(char *restrict dst, const char *restrict src, size_t size)
{
size_t len = 0;
char ch;
debug_decl(strlcpy_unescape, SUDOERS_DEBUG_UTIL);
while ((ch = *src++) != '\0') {
if (ch == '\\' && *src != '\0' && !isspace((unsigned char)*src))
ch = *src++;
if (size > 1) {
*dst++ = ch;
size--;
}
len++;
}
if (size > 0)
*dst = '\0';
debug_return_size_t(len);
}
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