13383decaSTim J. Robbins /* $OpenBSD: asprintf.c,v 1.8 2002/02/19 19:39:36 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 30333fc21eSDavid E. O'Brien #include <sys/cdefs.h> 31333fc21eSDavid E. O'Brien __FBSDID("$FreeBSD$"); 3215aa00d5SPeter Wemm 3315aa00d5SPeter Wemm #include <stdio.h> 3464a965e7SPeter Wemm #include <stdlib.h> 3564a965e7SPeter Wemm #include <errno.h> 3615aa00d5SPeter Wemm #include <stdarg.h> 3715aa00d5SPeter Wemm 3829ac6bd2SDaniel Eischen #include "local.h" 3929ac6bd2SDaniel Eischen 4015aa00d5SPeter Wemm int 4115aa00d5SPeter Wemm asprintf(char **str, char const *fmt, ...) 4215aa00d5SPeter Wemm { 4315aa00d5SPeter Wemm int ret; 4415aa00d5SPeter Wemm va_list ap; 4564a965e7SPeter Wemm FILE f; 46e74101e4STim J. Robbins struct __sFILEX ext; 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); 51344141d1STim J. Robbins if (f._bf._base == NULL) { 523383decaSTim J. Robbins *str = NULL; 533383decaSTim J. Robbins errno = ENOMEM; 543383decaSTim J. Robbins return (-1); 5515aa00d5SPeter Wemm } 56344141d1STim J. Robbins f._bf._size = f._w = 127; /* Leave room for the NUL */ 57344141d1STim J. Robbins f._extra = &ext; 58344141d1STim J. Robbins INITEXTRA(&f); 59344141d1STim J. Robbins va_start(ap, fmt); 60344141d1STim J. Robbins ret = __vfprintf(&f, fmt, ap); /* Use unlocked __vfprintf */ 61344141d1STim J. Robbins va_end(ap); 62344141d1STim J. Robbins if (ret < 0) { 63344141d1STim J. Robbins free(f._bf._base); 64344141d1STim J. Robbins *str = NULL; 65344141d1STim J. Robbins errno = ENOMEM; 66344141d1STim J. Robbins return (-1); 67344141d1STim J. Robbins } 68344141d1STim J. Robbins *f._p = '\0'; 69344141d1STim J. Robbins *str = (char *)f._bf._base; 70344141d1STim J. Robbins return (ret); 71344141d1STim J. Robbins } 72