1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #pragma ident "%Z%%M% %I% %E% SMI" 28 29 /* Copyright (c) 1988 AT&T */ 30 /* All Rights Reserved */ 31 32 33 #include "synonyms.h" 34 #include <thread.h> 35 #include <mtlib.h> 36 #include <synch.h> 37 #include <stdarg.h> 38 #include <values.h> 39 #include <errno.h> 40 #include <sys/types.h> 41 #include "print.h" 42 #include "libc.h" 43 #include "mse.h" 44 45 /* 46 * 32-bit shadow function of vfprintf() is included here. 47 * When using the c89 compiler to build 32-bit applications, the size 48 * of intmax_t is 32-bits, otherwise the size of intmax_t is 64-bits. 49 * The shadow function uses 32-bit size of intmax_t for %j conversion. 50 * The #pragma redefine_extname in <stdio.h> selects the proper routine 51 * at compile time for the user application. 52 * NOTE: this function is only available in the 32-bit library. 53 */ 54 55 /*VARARGS2*/ 56 int 57 #ifdef _C89_INTMAX32 /* _C89_INTMAX32 version in 32-bit libc only */ 58 _vfprintf_c89(FILE *iop, const char *format, va_list ap) 59 #else 60 vfprintf(FILE *iop, const char *format, va_list ap) 61 #endif 62 { 63 ssize_t count; 64 rmutex_t *lk; 65 66 /* Use F*LOCKFILE() macros because vfprintf() is not async-safe. */ 67 FLOCKFILE(lk, iop); 68 69 _SET_ORIENTATION_BYTE(iop); 70 71 if (!(iop->_flag & _IOWRT)) { 72 /* if no write flag */ 73 if (iop->_flag & _IORW) { 74 /* if ok, cause read-write */ 75 iop->_flag |= _IOWRT; 76 } else { 77 /* else error */ 78 FUNLOCKFILE(lk); 79 errno = EBADF; 80 return (EOF); 81 } 82 } 83 #ifdef _C89_INTMAX32 84 count = _ndoprnt(format, ap, iop, _F_INTMAX32); 85 #else 86 count = _ndoprnt(format, ap, iop, 0); 87 #endif 88 89 /* check for error or EOF */ 90 if (FERROR(iop) || count == EOF) { 91 FUNLOCKFILE(lk); 92 return (EOF); 93 } 94 95 FUNLOCKFILE(lk); 96 97 /* check for overflow */ 98 if ((size_t)count > MAXINT) { 99 errno = EOVERFLOW; 100 return (EOF); 101 } else { 102 return ((int)count); 103 } 104 } 105