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 * 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 * 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 * 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 * 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 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