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 /* 33 * This symbol should not be defined, but there are some 34 * miserable old compiler libraries that depend on it. 35 */ 36 #pragma weak _fprintf = fprintf 37 38 #include "lint.h" 39 #include <mtlib.h> 40 #include <thread.h> 41 #include <synch.h> 42 #include <stdarg.h> 43 #include <values.h> 44 #include <errno.h> 45 #include "print.h" 46 #include <sys/types.h> 47 #include "libc.h" 48 #include "mse.h" 49 50 /*VARARGS2*/ 51 int 52 fprintf(FILE *iop, const char *format, ...) 53 { 54 ssize_t count; 55 rmutex_t *lk; 56 va_list ap; 57 58 va_start(ap, format); 59 60 /* Use F*LOCKFILE() macros because fprintf() is not async-safe. */ 61 FLOCKFILE(lk, iop); 62 63 _SET_ORIENTATION_BYTE(iop); 64 65 if (!(iop->_flag & _IOWRT)) { 66 /* if no write flag */ 67 if (iop->_flag & _IORW) { 68 /* if ok, cause read-write */ 69 iop->_flag |= _IOWRT; 70 } else { 71 /* else error */ 72 FUNLOCKFILE(lk); 73 errno = EBADF; 74 return (EOF); 75 } 76 } 77 count = _ndoprnt(format, ap, iop, 0); 78 79 /* return EOF on error or EOF */ 80 if (FERROR(iop) || count == EOF) { 81 FUNLOCKFILE(lk); 82 return (EOF); 83 } 84 85 FUNLOCKFILE(lk); 86 87 /* error on overflow */ 88 if ((size_t)count > MAXINT) { 89 errno = EOVERFLOW; 90 return (EOF); 91 } 92 return ((int)count); 93 } 94 95 #ifndef _LP64 96 97 /* 98 * 32-bit shadow function of fprintf(). 99 * When using the c89 compiler to build 32-bit applications, the size 100 * of intmax_t is 32-bits, otherwise the size of intmax_t is 64-bits. 101 * The shadow function uses 32-bit size of intmax_t for %j conversion. 102 * The #pragma redefine_extname in <stdio.h> selects the proper routine 103 * at compile time for the user application. 104 * NOTE: this function only exists in the 32-bit library. 105 */ 106 107 int 108 _fprintf_c89(FILE *iop, const char *format, ...) 109 { 110 ssize_t count; 111 va_list ap; 112 113 va_start(ap, format); 114 count = _vfprintf_c89(iop, format, ap); 115 va_end(ap); 116 return ((int)count); 117 } 118 119 #endif /* _LP64 */ 120