1 /* $OpenBSD: xmalloc.c,v 1.10 2019/06/28 05:44:09 deraadt Exp $ */
2 /*
3 * Author: Tatu Ylonen <ylo@cs.hut.fi>
4 * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
5 * All rights reserved
6 * Versions of malloc and friends that check their results, and never return
7 * failure (they call fatal if they encounter an error).
8 *
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".
14 */
15
16 #include <err.h>
17 #include <stdarg.h>
18 #include <stdint.h>
19 #include <stdio.h>
20 #include <stdlib.h>
21 #include <string.h>
22
23 #include "xmalloc.h"
24
25 void *
xmalloc(size_t size)26 xmalloc(size_t size)
27 {
28 void *ptr;
29
30 if (size == 0)
31 errx(2, "xmalloc: zero size");
32 ptr = malloc(size);
33 if (ptr == NULL)
34 err(2, "xmalloc: allocating %zu bytes", size);
35 return ptr;
36 }
37
38 void *
xcalloc(size_t nmemb,size_t size)39 xcalloc(size_t nmemb, size_t size)
40 {
41 void *ptr;
42
43 ptr = calloc(nmemb, size);
44 if (ptr == NULL)
45 err(2, "xcalloc: allocating %zu * %zu bytes", nmemb, size);
46 return ptr;
47 }
48
49 void *
xreallocarray(void * ptr,size_t nmemb,size_t size)50 xreallocarray(void *ptr, size_t nmemb, size_t size)
51 {
52 void *new_ptr;
53
54 new_ptr = reallocarray(ptr, nmemb, size);
55 if (new_ptr == NULL)
56 err(2, "xreallocarray: allocating %zu * %zu bytes",
57 nmemb, size);
58 return new_ptr;
59 }
60
61 char *
xstrdup(const char * str)62 xstrdup(const char *str)
63 {
64 char *cp;
65
66 if ((cp = strdup(str)) == NULL)
67 err(2, "xstrdup");
68 return cp;
69 }
70
71 int
xasprintf(char ** ret,const char * fmt,...)72 xasprintf(char **ret, const char *fmt, ...)
73 {
74 va_list ap;
75 int i;
76
77 va_start(ap, fmt);
78 i = vasprintf(ret, fmt, ap);
79 va_end(ap);
80
81 if (i == -1)
82 err(2, "xasprintf");
83
84 return i;
85 }
86