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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 <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sudoers.h>
#ifdef HAVE_STRLCPY
# define cpy_default strlcpy
#else
# define cpy_default sudo_strlcpy
#endif
/*
* Join a NULL-terminated array of strings using the specified separator
* char. If non-NULL, the copy function must have strlcpy-like semantics.
*/
char *
strvec_join(char *const argv[], char sep, size_t (*cpy)(char *, const char *, size_t))
{
char *dst, *result = NULL;
char *const *av;
size_t n, size = 0;
debug_decl(strvec_join, SUDOERS_DEBUG_UTIL);
for (av = argv; *av != NULL; av++)
size += strlen(*av) + 1;
if (size == 0 || (result = malloc(size)) == NULL) {
sudo_warnx(U_("%s: %s"), __func__, U_("unable to allocate memory"));
debug_return_ptr(NULL);
}
if (cpy == NULL)
cpy = cpy_default;
for (dst = result, av = argv; *av != NULL; av++) {
n = cpy(dst, *av, size);
if (n >= size) {
sudo_warnx(U_("internal error, %s overflow"), __func__);
free(result);
debug_return_ptr(NULL);
}
dst += n;
size -= n;
*dst++ = sep;
size--;
}
dst[-1] = '\0';
debug_return_str(result);
}
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