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File: [local] / src / usr.bin / mandoc / mandoc_aux.c (download)
Revision 1.9, Wed Feb 7 20:04:33 2018 UTC (6 years, 4 months ago) by schwarze
Fix the mandoc_strndup() utility function. All existing callers seem safe so far, but implementing it with an unchecked memcpy(3) is just wrong and quite dangerous. |
/* $OpenBSD: mandoc_aux.c,v 1.9 2018/02/07 20:04:33 schwarze Exp $ */ /* * Copyright (c) 2009, 2011 Kristaps Dzonsons <kristaps@bsd.lv> * Copyright (c) 2014, 2015, 2017 Ingo Schwarze <schwarze@openbsd.org> * * 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 AUTHORS DISCLAIM ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS 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. */ #include <sys/types.h> #include <err.h> #include <stdarg.h> #include <stdlib.h> #include <stdio.h> #include <string.h> #include "mandoc.h" #include "mandoc_aux.h" int mandoc_asprintf(char **dest, const char *fmt, ...) { va_list ap; int ret; va_start(ap, fmt); ret = vasprintf(dest, fmt, ap); va_end(ap); if (ret == -1) err((int)MANDOCLEVEL_SYSERR, NULL); return ret; } void * mandoc_calloc(size_t num, size_t size) { void *ptr; ptr = calloc(num, size); if (ptr == NULL) err((int)MANDOCLEVEL_SYSERR, NULL); return ptr; } void * mandoc_malloc(size_t size) { void *ptr; ptr = malloc(size); if (ptr == NULL) err((int)MANDOCLEVEL_SYSERR, NULL); return ptr; } void * mandoc_realloc(void *ptr, size_t size) { ptr = realloc(ptr, size); if (ptr == NULL) err((int)MANDOCLEVEL_SYSERR, NULL); return ptr; } void * mandoc_reallocarray(void *ptr, size_t num, size_t size) { ptr = reallocarray(ptr, num, size); if (ptr == NULL) err((int)MANDOCLEVEL_SYSERR, NULL); return ptr; } void * mandoc_recallocarray(void *ptr, size_t oldnum, size_t num, size_t size) { ptr = recallocarray(ptr, oldnum, num, size); if (ptr == NULL) err((int)MANDOCLEVEL_SYSERR, NULL); return ptr; } char * mandoc_strdup(const char *ptr) { char *p; p = strdup(ptr); if (p == NULL) err((int)MANDOCLEVEL_SYSERR, NULL); return p; } char * mandoc_strndup(const char *ptr, size_t sz) { char *p; p = strndup(ptr, sz); if (p == NULL) err((int)MANDOCLEVEL_SYSERR, NULL); return p; }