164a965e7SPeter Wemm /* $OpenBSD: vasprintf.c,v 1.4 1998/06/21 22:13:47 millert Exp $ */ 264a965e7SPeter Wemm 364a965e7SPeter Wemm /* 464a965e7SPeter Wemm * Copyright (c) 1997 Todd C. Miller <Todd.Miller@courtesan.com> 564a965e7SPeter Wemm * All rights reserved. 615aa00d5SPeter Wemm * 715aa00d5SPeter Wemm * Redistribution and use in source and binary forms, with or without 815aa00d5SPeter Wemm * modification, are permitted provided that the following conditions 915aa00d5SPeter Wemm * are met: 1015aa00d5SPeter Wemm * 1. Redistributions of source code must retain the above copyright 1115aa00d5SPeter Wemm * notice, this list of conditions and the following disclaimer. 1215aa00d5SPeter Wemm * 2. Redistributions in binary form must reproduce the above copyright 1315aa00d5SPeter Wemm * notice, this list of conditions and the following disclaimer in the 1415aa00d5SPeter Wemm * documentation and/or other materials provided with the distribution. 1564a965e7SPeter Wemm * 3. The name of the author may not be used to endorse or promote products 1664a965e7SPeter Wemm * derived from this software without specific prior written permission. 1715aa00d5SPeter Wemm * 1864a965e7SPeter Wemm * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, 1964a965e7SPeter Wemm * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY 2064a965e7SPeter Wemm * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 2164a965e7SPeter Wemm * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 2264a965e7SPeter Wemm * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 2364a965e7SPeter Wemm * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 2464a965e7SPeter Wemm * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 2564a965e7SPeter Wemm * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 2664a965e7SPeter Wemm * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 2764a965e7SPeter Wemm * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 2815aa00d5SPeter Wemm */ 2915aa00d5SPeter Wemm 3015aa00d5SPeter Wemm #if defined(LIBC_RCS) && !defined(lint) 317f3dea24SPeter Wemm static char rcsid[] = "$FreeBSD$"; 3215aa00d5SPeter Wemm #endif /* LIBC_RCS and not lint */ 3315aa00d5SPeter Wemm 3415aa00d5SPeter Wemm #include <stdio.h> 3515aa00d5SPeter Wemm #include <stdlib.h> 3664a965e7SPeter Wemm #include <errno.h> 37d201fe46SDaniel Eischen #include "local.h" 3815aa00d5SPeter Wemm 3915aa00d5SPeter Wemm int 4015aa00d5SPeter Wemm vasprintf(str, fmt, ap) 4115aa00d5SPeter Wemm char **str; 4215aa00d5SPeter Wemm const char *fmt; 4364a965e7SPeter Wemm _BSD_VA_LIST_ ap; 4415aa00d5SPeter Wemm { 4515aa00d5SPeter Wemm int ret; 4664a965e7SPeter Wemm FILE f; 4715aa00d5SPeter Wemm 4864a965e7SPeter Wemm f._file = -1; 4964a965e7SPeter Wemm f._flags = __SWR | __SSTR | __SALC; 5064a965e7SPeter Wemm f._bf._base = f._p = (unsigned char *)malloc(128); 5164a965e7SPeter Wemm if (f._bf._base == NULL) { 5264a965e7SPeter Wemm *str = NULL; 5364a965e7SPeter Wemm errno = ENOMEM; 5415aa00d5SPeter Wemm return (-1); 5515aa00d5SPeter Wemm } 5664a965e7SPeter Wemm f._bf._size = f._w = 127; /* Leave room for the NULL */ 57d201fe46SDaniel Eischen ret = __vfprintf(&f, fmt, ap); 5864a965e7SPeter Wemm *f._p = '\0'; 59e8420087SWarner Losh f._bf._base = reallocf(f._bf._base, f._bf._size + 1); 6064a965e7SPeter Wemm if (f._bf._base == NULL) { 6164a965e7SPeter Wemm errno = ENOMEM; 6264a965e7SPeter Wemm ret = -1; 6315aa00d5SPeter Wemm } 6464a965e7SPeter Wemm *str = (char *)f._bf._base; 6515aa00d5SPeter Wemm return (ret); 6615aa00d5SPeter Wemm } 67