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 /* 31 * This symbol should not be defined, but there are some 32 * miserable old compiler libraries that depend on it. 33 */ 34 #pragma weak _fprintf = fprintf 35 36 #include "lint.h" 37 #include <mtlib.h> 38 #include <thread.h> 39 #include <synch.h> 40 #include <stdarg.h> 41 #include <values.h> 42 #include <errno.h> 43 #include "print.h" 44 #include <sys/types.h> 45 #include "libc.h" 46 #include "mse.h" 47 48 /*VARARGS2*/ 49 int 50 fprintf(FILE *iop, const char *format, ...) 51 { 52 ssize_t count; 53 rmutex_t *lk; 54 va_list ap; 55 56 va_start(ap, format); 57 58 /* Use F*LOCKFILE() macros because fprintf() is not async-safe. */ 59 FLOCKFILE(lk, iop); 60 61 _SET_ORIENTATION_BYTE(iop); 62 63 if (!(iop->_flag & _IOWRT)) { 64 /* if no write flag */ 65 if (iop->_flag & _IORW) { 66 /* if ok, cause read-write */ 67 iop->_flag |= _IOWRT; 68 } else { 69 /* else error */ 70 FUNLOCKFILE(lk); 71 errno = EBADF; 72 return (EOF); 73 } 74 } 75 count = _ndoprnt(format, ap, iop, 0); 76 77 /* return EOF on error or EOF */ 78 if (FERROR(iop) || count == EOF) { 79 FUNLOCKFILE(lk); 80 return (EOF); 81 } 82 83 FUNLOCKFILE(lk); 84 85 /* error on overflow */ 86 if ((size_t)count > MAXINT) { 87 errno = EOVERFLOW; 88 return (EOF); 89 } 90 return ((int)count); 91 } 92 93 #ifndef _LP64 94 95 /* 96 * 32-bit shadow function of fprintf(). 97 * When using the c89 compiler to build 32-bit applications, the size 98 * of intmax_t is 32-bits, otherwise the size of intmax_t is 64-bits. 99 * The shadow function uses 32-bit size of intmax_t for %j conversion. 100 * The #pragma redefine_extname in <stdio.h> selects the proper routine 101 * at compile time for the user application. 102 * NOTE: this function only exists in the 32-bit library. 103 */ 104 105 int 106 _fprintf_c89(FILE *iop, const char *format, ...) 107 { 108 ssize_t count; 109 va_list ap; 110 111 va_start(ap, format); 112 count = _vfprintf_c89(iop, format, ap); 113 va_end(ap); 114 return ((int)count); 115 } 116 117 #endif /* _LP64 */ 118