usr/src/lib/libc/port/print/printf.c

   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 <mtlib.h>
  34 #include <stdarg.h>
  35 #include <errno.h>
  36 #include <thread.h>
  37 #include <synch.h>
  38 #include <values.h>
  39 #include "print.h"
  40 #include <sys/types.h>
  41 #include "libc.h"
  42 #include "mse.h"
  43
  44 /*VARARGS1*/
  45 int
  46 printf(const char *format, ...)
  47 {
  48         ssize_t count;
  49         rmutex_t *lk;
  50         va_list ap;
  51
  52         va_start(ap, format);
  53
  54         /* Use F*LOCKFILE() macros because printf() is not async-safe. */
  55         FLOCKFILE(lk, stdout);
  56
  57         _SET_ORIENTATION_BYTE(stdout);
  58
  59         if (!(stdout->_flag & _IOWRT)) {
  60                 /* if no write flag */
  61                 if (stdout->_flag & _IORW) {
  62                         /* if ok, cause read-write */
  63                         stdout->_flag |= _IOWRT;
  64                 } else {
  65                         /* else error */
  66                         FUNLOCKFILE(lk);
  67                         errno = EBADF;
  68                         return (EOF);
  69                 }
  70         }
  71         count = _ndoprnt(format, ap, stdout, 0);
  72         va_end(ap);
  73
  74         /* check for errors or EOF */
  75         if (FERROR(stdout) || count ==  EOF) {
  76                 FUNLOCKFILE(lk);
  77                 return (EOF);
  78         }
  79
  80         FUNLOCKFILE(lk);
  81
  82         /* check for overflow */
  83         if ((size_t)count > MAXINT) {
  84                 errno = EOVERFLOW;
  85                 return (EOF);
  86         } else {
  87                 return ((int)count);
  88         }
  89 }
  90
  91 #ifndef _LP64
  92
  93 /*
  94  * 32-bit shadow function of printf().
  95  * When using the c89 compiler to build 32-bit applications, the size
  96  * of intmax_t is 32-bits, otherwise the size of intmax_t is 64-bits.
  97  * The shadow function uses 32-bit size of intmax_t for %j conversion.
  98  * The #pragma redefine_extname in <stdio.h> selects the proper routine
  99  * at compile time for the user application.
 100  * NOTE: this function only exists in the 32-bit library.
 101  */
 102
 103 int
 104 _printf_c89(const char *format, ...)
 105 {
 106         ssize_t count;
 107         va_list ap;
 108
 109         va_start(ap, format);
 110         count = _vprintf_c89(format, ap);
 111         va_end(ap);
 112         return ((int)count);
 113 }
 114
 115 #endif