64 lines
1.2 KiB
C
Executable File
64 lines
1.2 KiB
C
Executable File
/* Copyright (c) 1988 AT&T */
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/* All Rights Reserved */
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/* THIS IS UNPUBLISHED PROPRIETARY SOURCE CODE OF AT&T */
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/* The copyright notice above does not evidence any */
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/* actual or intended publication of such source code. */
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#ident "@(#)printf.c 1.14 95/08/30 SMI" /* SVr4.0 1.14 */
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/*LINTLIBRARY*/
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#include "synonyms.h"
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#include "shlib.h"
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#include <stdio.h>
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#include <stdarg.h>
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#include <errno.h>
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#include <thread.h>
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#include <synch.h>
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#include <mtlib.h>
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#include "print.h"
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extern int _doprnt();
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/*VARARGS1*/
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int
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#ifdef __STDC__
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printf(const char *format, ...)
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#else
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printf(format, va_alist)
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char *format;
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va_dcl
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#endif
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{
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register int count, retval;
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#ifdef _REENTRANT
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rmutex_t *lk;
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#endif _REENTRANT
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va_list ap;
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#ifdef __STDC__
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va_start(ap, /* null */);
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#else
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va_start(ap);
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#endif
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/* Use F*LOCKFILE() macros because printf() is not async-safe. */
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FLOCKFILE(lk, stdout);
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if (!(stdout->_flag & _IOWRT)) {
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/* if no write flag */
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if (stdout->_flag & _IORW) {
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/* if ok, cause read-write */
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stdout->_flag |= _IOWRT;
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} else {
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/* else error */
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FUNLOCKFILE(lk);
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errno = EBADF;
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return (EOF);
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}
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}
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count = _doprnt(format, ap, stdout);
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va_end(ap);
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retval = (FERROR(stdout)? EOF: count);
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FUNLOCKFILE(lk);
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return (retval);
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}
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