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 (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 /* Copyright (c) 1988 AT&T */ 28 /* All Rights Reserved */ 29 30 #pragma ident "%Z%%M% %I% %E% SMI" 31 32 #include "lint.h" 33 #include <thread.h> 34 #include <mtlib.h> 35 #include <synch.h> 36 #include <stdarg.h> 37 #include <values.h> 38 #include <errno.h> 39 #include <sys/types.h> 40 #include "print.h" 41 #include "libc.h" 42 #include "mse.h" 43 44 /* 45 * 32-bit shadow function of vfprintf() is included here. 46 * When using the c89 compiler to build 32-bit applications, the size 47 * of intmax_t is 32-bits, otherwise the size of intmax_t is 64-bits. 48 * The shadow function uses 32-bit size of intmax_t for %j conversion. 49 * The #pragma redefine_extname in <stdio.h> selects the proper routine 50 * at compile time for the user application. 51 * NOTE: this function is only available in the 32-bit library. 52 */ 53 54 /*VARARGS2*/ 55 int 56 #ifdef _C89_INTMAX32 /* _C89_INTMAX32 version in 32-bit libc only */ 57 _vfprintf_c89(FILE *iop, const char *format, va_list ap) 58 #else 59 vfprintf(FILE *iop, const char *format, va_list ap) 60 #endif 61 { 62 ssize_t count; 63 rmutex_t *lk; 64 65 /* Use F*LOCKFILE() macros because vfprintf() is not async-safe. */ 66 FLOCKFILE(lk, iop); 67 68 _SET_ORIENTATION_BYTE(iop); 69 70 if (!(iop->_flag & _IOWRT)) { 71 /* if no write flag */ 72 if (iop->_flag & _IORW) { 73 /* if ok, cause read-write */ 74 iop->_flag |= _IOWRT; 75 } else { 76 /* else error */ 77 FUNLOCKFILE(lk); 78 errno = EBADF; 79 return (EOF); 80 } 81 } 82 #ifdef _C89_INTMAX32 83 count = _ndoprnt(format, ap, iop, _F_INTMAX32); 84 #else 85 count = _ndoprnt(format, ap, iop, 0); 86 #endif 87 88 /* check for error or EOF */ 89 if (FERROR(iop) || count == EOF) { 90 FUNLOCKFILE(lk); 91 return (EOF); 92 } 93 94 FUNLOCKFILE(lk); 95 96 /* check for overflow */ 97 if ((size_t)count > MAXINT) { 98 errno = EOVERFLOW; 99 return (EOF); 100 } else { 101 return ((int)count); 102 } 103 } 104