ypxfrd_server.c revision 16125
1/* 2 * Copyright (c) 1995, 1996 3 * Bill Paul <wpaul@ctr.columbia.edu>. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by Bill Paul. 16 * 4. Neither the name of the author nor the names of any co-contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL Bill Paul OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * $Id: ypxfrd_server.c,v 1.5 1996/06/02 17:34:49 wpaul Exp $ 33 */ 34 35#include "ypxfrd.h" 36#ifndef lint 37static const char rcsid[] = "$Id: ypxfrd_server.c,v 1.5 1996/06/02 17:34:49 wpaul Exp $"; 38#endif /* not lint */ 39 40#include <stdio.h> 41#include <stdlib.h> 42#include <unistd.h> 43#include <string.h> 44#include <errno.h> 45#include <sys/types.h> 46#include <sys/param.h> 47#include <sys/uio.h> 48#include <sys/fcntl.h> 49#include "ypxfrd_extern.h" 50 51int forked = 0; 52int children = 0; 53int fp = 0; 54 55static bool_t 56xdr_my_xfr(register XDR *xdrs, xfr *objp) 57{ 58 unsigned char buf[XFRBLOCKSIZE]; 59 60 while(1) { 61 if ((objp->xfr_u.xfrblock_buf.xfrblock_buf_len = 62 read(fp, &buf, XFRBLOCKSIZE)) != -1) { 63 objp->ok = TRUE; 64 objp->xfr_u.xfrblock_buf.xfrblock_buf_val = (char *)&buf; 65 } else { 66 objp->ok = FALSE; 67 objp->xfr_u.xfrstat = XFR_READ_ERR; 68 yp_error("read error: %s", strerror(errno)); 69 } 70 71 /* Serialize */ 72 if (!xdr_xfr(xdrs, objp)) 73 return(FALSE); 74 if (objp->ok == FALSE) 75 return(TRUE); 76 if (objp->xfr_u.xfrblock_buf.xfrblock_buf_len < XFRBLOCKSIZE) { 77 objp->ok = FALSE; 78 objp->xfr_u.xfrstat = XFR_DONE; 79 if (!xdr_xfr(xdrs, objp)) 80 return(FALSE); 81 return(TRUE); 82 } 83 } 84} 85 86struct xfr * 87ypxfrd_getmap_1_svc(ypxfr_mapname *argp, struct svc_req *rqstp) 88{ 89 static struct xfr result; 90 char buf[MAXPATHLEN]; 91 92 result.ok = FALSE; 93 result.xfr_u.xfrstat = XFR_DENIED; 94 95 if (yp_validdomain(argp->xfrdomain)) { 96 return(&result); 97 } 98 99 if (yp_access(argp->xfrmap, (struct svc_req *)rqstp)) { 100 return(&result); 101 } 102 103 snprintf (buf, sizeof(buf), "%s/%s/%s", yp_dir, argp->xfrdomain, 104 argp->xfrmap); 105 if (access((char *)&buf, R_OK) == -1) { 106 result.xfr_u.xfrstat = XFR_ACCESS; 107 return(&result); 108 } 109#ifndef DEBUG 110 if (children < MAX_CHILDREN && fork()) { 111 children++; 112 forked = 0; 113 return (NULL); 114 } else { 115 forked++; 116 } 117#endif 118 if ((fp = open((char *)&buf, O_RDONLY)) == -1) { 119 result.xfr_u.xfrstat = XFR_READ_ERR; 120 return(&result); 121 } 122 123 /* Start sending the file. */ 124 125 svc_sendreply(rqstp->rq_xprt, xdr_my_xfr, (char *)&result); 126 127 close(fp); 128 129 return (NULL); 130} 131