xref: /illumos-gate/usr/src/lib/libc/port/print/fprintf.c (revision 7257d1b4)
17c478bd9Sstevel@tonic-gate /*
27c478bd9Sstevel@tonic-gate  * CDDL HEADER START
37c478bd9Sstevel@tonic-gate  *
47c478bd9Sstevel@tonic-gate  * The contents of this file are subject to the terms of the
5*7257d1b4Sraf  * Common Development and Distribution License (the "License").
6*7257d1b4Sraf  * You may not use this file except in compliance with the License.
77c478bd9Sstevel@tonic-gate  *
87c478bd9Sstevel@tonic-gate  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
97c478bd9Sstevel@tonic-gate  * or http://www.opensolaris.org/os/licensing.
107c478bd9Sstevel@tonic-gate  * See the License for the specific language governing permissions
117c478bd9Sstevel@tonic-gate  * and limitations under the License.
127c478bd9Sstevel@tonic-gate  *
137c478bd9Sstevel@tonic-gate  * When distributing Covered Code, include this CDDL HEADER in each
147c478bd9Sstevel@tonic-gate  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
157c478bd9Sstevel@tonic-gate  * If applicable, add the following below this CDDL HEADER, with the
167c478bd9Sstevel@tonic-gate  * fields enclosed by brackets "[]" replaced with your own identifying
177c478bd9Sstevel@tonic-gate  * information: Portions Copyright [yyyy] [name of copyright owner]
187c478bd9Sstevel@tonic-gate  *
197c478bd9Sstevel@tonic-gate  * CDDL HEADER END
207c478bd9Sstevel@tonic-gate  */
227c478bd9Sstevel@tonic-gate /*
23*7257d1b4Sraf  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
247c478bd9Sstevel@tonic-gate  * Use is subject to license terms.
257c478bd9Sstevel@tonic-gate  */
277c478bd9Sstevel@tonic-gate /*	Copyright (c) 1988 AT&T	*/
287c478bd9Sstevel@tonic-gate /*	  All Rights Reserved  	*/
30*7257d1b4Sraf #pragma ident	"%Z%%M%	%I%	%E% SMI"
32*7257d1b4Sraf /*
33*7257d1b4Sraf  * This symbol should not be defined, but there are some
34*7257d1b4Sraf  * miserable old compiler libraries that depend on it.
35*7257d1b4Sraf  */
36*7257d1b4Sraf #pragma weak _fprintf = fprintf
38*7257d1b4Sraf #include "lint.h"
397c478bd9Sstevel@tonic-gate #include <mtlib.h>
407c478bd9Sstevel@tonic-gate #include <thread.h>
417c478bd9Sstevel@tonic-gate #include <synch.h>
427c478bd9Sstevel@tonic-gate #include <stdarg.h>
437c478bd9Sstevel@tonic-gate #include <values.h>
447c478bd9Sstevel@tonic-gate #include <errno.h>
457c478bd9Sstevel@tonic-gate #include "print.h"
467c478bd9Sstevel@tonic-gate #include <sys/types.h>
477c478bd9Sstevel@tonic-gate #include "libc.h"
487c478bd9Sstevel@tonic-gate #include "mse.h"
507c478bd9Sstevel@tonic-gate /*VARARGS2*/
517c478bd9Sstevel@tonic-gate int
fprintf(FILE * iop,const char * format,...)527c478bd9Sstevel@tonic-gate fprintf(FILE *iop, const char *format, ...)
537c478bd9Sstevel@tonic-gate {
547c478bd9Sstevel@tonic-gate 	ssize_t count;
557c478bd9Sstevel@tonic-gate 	rmutex_t *lk;
567c478bd9Sstevel@tonic-gate 	va_list ap;
587c478bd9Sstevel@tonic-gate 	va_start(ap, format);
607c478bd9Sstevel@tonic-gate 	/* Use F*LOCKFILE() macros because fprintf() is not async-safe. */
617c478bd9Sstevel@tonic-gate 	FLOCKFILE(lk, iop);
637c478bd9Sstevel@tonic-gate 	_SET_ORIENTATION_BYTE(iop);
657c478bd9Sstevel@tonic-gate 	if (!(iop->_flag & _IOWRT)) {
667c478bd9Sstevel@tonic-gate 		/* if no write flag */
677c478bd9Sstevel@tonic-gate 		if (iop->_flag & _IORW) {
687c478bd9Sstevel@tonic-gate 			/* if ok, cause read-write */
697c478bd9Sstevel@tonic-gate 			iop->_flag |= _IOWRT;
707c478bd9Sstevel@tonic-gate 		} else {
717c478bd9Sstevel@tonic-gate 			/* else error */
727c478bd9Sstevel@tonic-gate 			FUNLOCKFILE(lk);
737c478bd9Sstevel@tonic-gate 			errno = EBADF;
747c478bd9Sstevel@tonic-gate 			return (EOF);
757c478bd9Sstevel@tonic-gate 		}
767c478bd9Sstevel@tonic-gate 	}
777c478bd9Sstevel@tonic-gate 	count = _ndoprnt(format, ap, iop, 0);
797c478bd9Sstevel@tonic-gate 	/* return EOF on error or EOF */
807c478bd9Sstevel@tonic-gate 	if (FERROR(iop) || count == EOF) {
817c478bd9Sstevel@tonic-gate 		FUNLOCKFILE(lk);
827c478bd9Sstevel@tonic-gate 		return (EOF);
837c478bd9Sstevel@tonic-gate 	}
857c478bd9Sstevel@tonic-gate 	FUNLOCKFILE(lk);
877c478bd9Sstevel@tonic-gate 	/* error on overflow */
887c478bd9Sstevel@tonic-gate 	if ((size_t)count > MAXINT) {
897c478bd9Sstevel@tonic-gate 		errno = EOVERFLOW;
907c478bd9Sstevel@tonic-gate 		return (EOF);
917c478bd9Sstevel@tonic-gate 	}
927c478bd9Sstevel@tonic-gate 	return ((int)count);
937c478bd9Sstevel@tonic-gate }
957c478bd9Sstevel@tonic-gate #ifndef _LP64
977c478bd9Sstevel@tonic-gate /*
987c478bd9Sstevel@tonic-gate  * 32-bit shadow function of fprintf().
997c478bd9Sstevel@tonic-gate  * When using the c89 compiler to build 32-bit applications, the size
1007c478bd9Sstevel@tonic-gate  * of intmax_t is 32-bits, otherwise the size of intmax_t is 64-bits.
1017c478bd9Sstevel@tonic-gate  * The shadow function uses 32-bit size of intmax_t for %j conversion.
1027c478bd9Sstevel@tonic-gate  * The #pragma redefine_extname in <stdio.h> selects the proper routine
1037c478bd9Sstevel@tonic-gate  * at compile time for the user application.
1047c478bd9Sstevel@tonic-gate  * NOTE: this function only exists in the 32-bit library.
1057c478bd9Sstevel@tonic-gate  */
1077c478bd9Sstevel@tonic-gate int
_fprintf_c89(FILE * iop,const char * format,...)1087c478bd9Sstevel@tonic-gate _fprintf_c89(FILE *iop, const char *format, ...)
1097c478bd9Sstevel@tonic-gate {
1107c478bd9Sstevel@tonic-gate 	ssize_t count;
1117c478bd9Sstevel@tonic-gate 	va_list ap;
1137c478bd9Sstevel@tonic-gate 	va_start(ap, format);
1147c478bd9Sstevel@tonic-gate 	count = _vfprintf_c89(iop, format, ap);
1157c478bd9Sstevel@tonic-gate 	va_end(ap);
1167c478bd9Sstevel@tonic-gate 	return ((int)count);
1177c478bd9Sstevel@tonic-gate }
1197c478bd9Sstevel@tonic-gate #endif  /* _LP64 */