mirror of https://github.com/sudo-project/sudo.git
104 lines
2.5 KiB
C
104 lines
2.5 KiB
C
/*
|
|
* SPDX-License-Identifier: ISC
|
|
*
|
|
* Copyright (c) 2016-2018 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 <stddef.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
#include <sudo_compat.h>
|
|
#include <sudo_debug.h>
|
|
#include <sudo_util.h>
|
|
|
|
/* Trivial reference-counted strings. */
|
|
struct rcstr {
|
|
int refcnt;
|
|
char str[];
|
|
};
|
|
|
|
/*
|
|
* Allocate a reference-counted string and copy src to it.
|
|
* Returns the newly-created string with a refcnt of 1.
|
|
*/
|
|
char *
|
|
sudo_rcstr_dup(const char *src)
|
|
{
|
|
size_t len = strlen(src);
|
|
char *dst;
|
|
debug_decl(sudo_rcstr_dup, SUDO_DEBUG_UTIL);
|
|
|
|
dst = sudo_rcstr_alloc(len);
|
|
if (dst != NULL) {
|
|
memcpy(dst, src, len);
|
|
dst[len] = '\0';
|
|
}
|
|
debug_return_ptr(dst);
|
|
}
|
|
|
|
char *
|
|
sudo_rcstr_alloc(size_t len)
|
|
{
|
|
struct rcstr *rcs;
|
|
debug_decl(sudo_rcstr_dup, SUDO_DEBUG_UTIL);
|
|
|
|
rcs = malloc(sizeof(struct rcstr) + len + 1);
|
|
if (rcs == NULL)
|
|
return NULL;
|
|
|
|
rcs->refcnt = 1;
|
|
rcs->str[0] = '\0';
|
|
/* cppcheck-suppress memleak */
|
|
debug_return_ptr(rcs->str); // -V773
|
|
}
|
|
|
|
char *
|
|
sudo_rcstr_addref(const char *s)
|
|
{
|
|
struct rcstr *rcs;
|
|
debug_decl(sudo_rcstr_dup, SUDO_DEBUG_UTIL);
|
|
|
|
if (s == NULL)
|
|
debug_return_ptr(NULL);
|
|
|
|
rcs = __containerof((const void *)s, struct rcstr, str);
|
|
rcs->refcnt++;
|
|
debug_return_ptr(rcs->str);
|
|
}
|
|
|
|
void
|
|
sudo_rcstr_delref(const char *s)
|
|
{
|
|
struct rcstr *rcs;
|
|
debug_decl(sudo_rcstr_dup, SUDO_DEBUG_UTIL);
|
|
|
|
if (s != NULL) {
|
|
rcs = __containerof((const void *)s, struct rcstr, str);
|
|
if (--rcs->refcnt == 0) {
|
|
rcs->str[0] = '\0';
|
|
free(rcs);
|
|
}
|
|
}
|
|
debug_return;
|
|
}
|