1 /* $OpenBSD: xmalloc.c,v 1.9 2015/11/17 18:25:02 tobias 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 <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 * 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 * 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 * 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 * 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 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 < 0 || *ret == NULL) 85 err(2, "xasprintf"); 86 87 return i; 88 } 89