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