1 /* $OpenBSD: xmalloc.c,v 1.10 2019/06/28 05:44:09 deraadt Exp $ */
2 /*
3 * Author: Tatu Ylonen <[email protected]>
4 * Copyright (c) 1995 Tatu Ylonen <[email protected]>, 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 <sys/cdefs.h>
17 __FBSDID("$FreeBSD$");
18
19 #include <err.h>
20 #include <stdarg.h>
21 #include <stdint.h>
22 #include <stdio.h>
23 #include <stdlib.h>
24 #include <string.h>
25
26 #include "xmalloc.h"
27
28 void *
xmalloc(size_t size)29 xmalloc(size_t size)
30 {
31 void *ptr;
32
33 if (size == 0)
34 errx(2, "xmalloc: zero size");
35 ptr = malloc(size);
36 if (ptr == NULL)
37 err(2, "xmalloc: allocating %zu bytes", size);
38 return ptr;
39 }
40
41 void *
xcalloc(size_t nmemb,size_t size)42 xcalloc(size_t nmemb, size_t size)
43 {
44 void *ptr;
45
46 ptr = calloc(nmemb, size);
47 if (ptr == NULL)
48 err(2, "xcalloc: allocating %zu * %zu bytes", nmemb, size);
49 return ptr;
50 }
51
52 void *
xreallocarray(void * ptr,size_t nmemb,size_t size)53 xreallocarray(void *ptr, size_t nmemb, size_t size)
54 {
55 void *new_ptr;
56
57 new_ptr = reallocarray(ptr, nmemb, size);
58 if (new_ptr == NULL)
59 err(2, "xreallocarray: allocating %zu * %zu bytes",
60 nmemb, size);
61 return new_ptr;
62 }
63
64 char *
xstrdup(const char * str)65 xstrdup(const char *str)
66 {
67 char *cp;
68
69 if ((cp = strdup(str)) == NULL)
70 err(2, "xstrdup");
71 return cp;
72 }
73
74 int
xasprintf(char ** ret,const char * fmt,...)75 xasprintf(char **ret, const char *fmt, ...)
76 {
77 va_list ap;
78 int i;
79
80 va_start(ap, fmt);
81 i = vasprintf(ret, fmt, ap);
82 va_end(ap);
83
84 if (i == -1)
85 err(2, "xasprintf");
86
87 return i;
88 }
89