1 /* $OpenBSD: vdprintf.c,v 1.2 2015/08/31 02:53:57 guenther Exp $ */ 2 /* $FreeBSD: src/lib/libc/stdio/vdprintf.c,v 1.4 2012/11/17 01:49:40 svnexp Exp $ */ 3 4 /*- 5 * Copyright (c) 2009 David Schultz <das@FreeBSD.org> 6 * All rights reserved. 7 * 8 * Copyright (c) 2011 The FreeBSD Foundation 9 * All rights reserved. 10 * Portions of this software were developed by David Chisnall 11 * under sponsorship from the FreeBSD Foundation. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 #include <errno.h> 36 #include <stdarg.h> 37 #include <stdio.h> 38 #include <string.h> 39 #include <unistd.h> 40 41 #include "local.h" 42 43 static int 44 __dwrite(void *cookie, const char *buf, int n) 45 { 46 int *fdp = cookie; 47 return (write(*fdp, buf, n)); 48 } 49 50 int 51 vdprintf(int fd, const char * __restrict fmt, va_list ap) 52 { 53 FILE f; 54 struct __sfileext fext; 55 unsigned char buf[BUFSIZ]; 56 int ret; 57 58 _FILEEXT_SETUP(&f, &fext); 59 60 f._p = buf; 61 f._w = sizeof(buf); 62 f._flags = __SWR; 63 f._file = -1; 64 f._bf._base = buf; 65 f._bf._size = sizeof(buf); 66 f._cookie = &fd; 67 f._write = __dwrite; 68 69 if ((ret = __vfprintf(&f, fmt, ap)) < 0) 70 return ret; 71 72 return fflush(&f) ? EOF : ret; 73 } 74 DEF_WEAK(vdprintf); 75