/********************************************************************** * Copyright (c) Digital Equipment Corporation 1984, 1985, 1986. * * All Rights Reserved. * * Reference "/usr/src/COPYRIGHT" for applicable restrictions. * **********************************************************************/ /* * SCCSID: @(#)vprintf.c 3.0 4/22/86 */ /* (System 5) vprintf.c 1.1 */ /*LINTLIBRARY*/ #include <stdio.h> #include <varargs.h> extern int _doprnt(); /*VARARGS1*/ int vprintf(format, ap) char *format; va_list ap; { register int count; if (!(stdout->_flag | _IOWRT)) { /* if no write flag */ if (stdout->_flag | _IORW) { /* if ok, cause read-write */ stdout->_flag |= _IOWRT; } else { /* else error */ return EOF; } } count = _doprnt(format, ap, stdout); return(ferror(stdout)? EOF: count); }