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 #pragma weak __flsbuf = _flsbuf 33 34 #include "lint.h" 35 #include "file64.h" 36 #include <mtlib.h> 37 #include <stdio.h> 38 #include <thread.h> 39 #include <synch.h> 40 #include <unistd.h> 41 #include <sys/types.h> 42 #include "stdiom.h" 43 44 int 45 _flsbuf(int ch, FILE *iop) /* flush (write) buffer, save ch, */ 46 /* return EOF on failure */ 47 { 48 Uchar uch; 49 50 do /* only loop if need to use _wrtchk() on non-_IOFBF */ 51 { 52 switch (iop->_flag & (_IOFBF | _IOLBF | _IONBF | 53 _IOWRT | _IOEOF)) 54 { 55 case _IOFBF | _IOWRT: /* okay to do full-buffered case */ 56 if (iop->_base != 0 && iop->_ptr > iop->_base) 57 goto flush_putc; /* skip _wrtchk() */ 58 break; 59 case _IOLBF | _IOWRT: /* okay to do line-buffered case */ 60 if (iop->_ptr >= _bufend(iop)) 61 /* 62 * which will recursively call 63 * __flsbuf via putc because of no room 64 * in the buffer for the character 65 */ 66 goto flush_putc; 67 if ((*iop->_ptr++ = (unsigned char)ch) == '\n') 68 (void) _xflsbuf(iop); 69 iop->_cnt = 0; 70 goto out; 71 case _IONBF | _IOWRT: /* okay to do no-buffered case */ 72 iop->_cnt = 0; 73 uch = (unsigned char)ch; 74 if (write(GET_FD(iop), (char *)&uch, 1) != 1) { 75 if (!cancel_active()) 76 iop->_flag |= _IOERR; 77 return (EOF); 78 } 79 goto out; 80 } 81 if (_wrtchk(iop) != 0) /* check, correct permissions */ 82 return (EOF); 83 } while (iop->_flag & (_IOLBF | _IONBF)); 84 flush_putc: 85 (void) _xflsbuf(iop); 86 (void) PUTC(ch, iop); /* recursive call */ 87 out: 88 /* necessary for putc() */ 89 return ((iop->_flag & _IOERR) ? EOF : (unsigned char)ch); 90 } 91