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