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usr.bin/diff/xmalloc.c
85 строк
2 KB
deraadt
asprintf returns -1, not an arbitrary value < 0. Also upon error the
28 июн 2019, 08:44
28 июн 2019, 08:44
7d5bbbe
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/* $OpenBSD: xmalloc.c,v 1.10 2019/06/28 05:44:09 deraadt Exp $ */ /* * Author: Tatu Ylonen <ylo@cs.hut.fi> * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland * All rights reserved * Versions of malloc and friends that check their results, and never return * failure (they call fatal if they encounter an error). * * As far as I am concerned, the code I have written for this software * can be used freely for any purpose. Any derived versions of this * software must be clearly marked as such, and if the derived work is * incompatible with the protocol description in the RFC file, it must be * called by a name other than "ssh" or "Secure Shell". */ #include <err.h> #include <stdarg.h> #include <stdint.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include "xmalloc.h" void * xmalloc(size_t size) { void *ptr; if (size == 0) errx(2, "xmalloc: zero size"); ptr = malloc(size); if (ptr == NULL) err(2, "xmalloc: allocating %zu bytes", size); return ptr; } void * xcalloc(size_t nmemb, size_t size) { void *ptr; ptr = calloc(nmemb, size); if (ptr == NULL) err(2, "xcalloc: allocating %zu * %zu bytes", nmemb, size); return ptr; } void * xreallocarray(void *ptr, size_t nmemb, size_t size) { void *new_ptr; new_ptr = reallocarray(ptr, nmemb, size); if (new_ptr == NULL) err(2, "xreallocarray: allocating %zu * %zu bytes", nmemb, size); return new_ptr; } char * xstrdup(const char *str) { char *cp; if ((cp = strdup(str)) == NULL) err(2, "xstrdup"); return cp; } int xasprintf(char **ret, const char *fmt, ...) { va_list ap; int i; va_start(ap, fmt); i = vasprintf(ret, fmt, ap); va_end(ap); if (i == -1) err(2, "xasprintf"); return i; }