1 /* $OpenBSD: xmalloc.c,v 1.27 2006/08/03 03:34:42 deraadt Exp $ */
3 * Author: Tatu Ylonen <ylo@cs.hut.fi>
4 * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
6 * Versions of malloc and friends that check their results, and never return
7 * failure (they call fatal if they encounter an error).
9 * As far as I am concerned, the code I have written for this software
10 * can be used freely for any purpose. Any derived versions of this
11 * software must be clearly marked as such, and if the derived work is
12 * incompatible with the protocol description in the RFC file, it must be
13 * called by a name other than "ssh" or "Secure Shell".
18 #include <sys/param.h>
33 fatal("xmalloc: zero size");
36 fatal("xmalloc: out of memory (allocating %lu bytes)", (u_long) size);
41 xcalloc(size_t nmemb, size_t size)
45 if (size == 0 || nmemb == 0)
46 fatal("xcalloc: zero size");
47 if (SIZE_T_MAX / nmemb < size)
48 fatal("xcalloc: nmemb * size > SIZE_T_MAX");
49 ptr = calloc(nmemb, size);
51 fatal("xcalloc: out of memory (allocating %lu bytes)",
52 (u_long)(size * nmemb));
57 xrealloc(void *ptr, size_t nmemb, size_t size)
60 size_t new_size = nmemb * size;
63 fatal("xrealloc: zero size");
64 if (SIZE_T_MAX / nmemb < size)
65 fatal("xrealloc: nmemb * size > SIZE_T_MAX");
67 new_ptr = malloc(new_size);
69 new_ptr = realloc(ptr, new_size);
71 fatal("xrealloc: out of memory (new_size %lu bytes)",
80 fatal("xfree: NULL pointer given as argument");
85 xstrdup(const char *str)
90 len = strlen(str) + 1;
92 strlcpy(cp, str, len);
97 xasprintf(char **ret, const char *fmt, ...)
103 i = vasprintf(ret, fmt, ap);
106 if (i < 0 || *ret == NULL)
107 fatal("xasprintf: could not allocate memory");