1 /* 2 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for 3 * unrestricted use provided that this legend is included on all tape 4 * media and as a part of the software program in whole or part. Users 5 * may copy or modify Sun RPC without charge, but are not authorized 6 * to license or distribute it to anyone else except as part of a product or 7 * program developed by the user. 8 * 9 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE 10 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR 11 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. 12 * 13 * Sun RPC is provided with no support and without any obligation on the 14 * part of Sun Microsystems, Inc. to assist in its use, correction, 15 * modification or enhancement. 16 * 17 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE 18 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC 19 * OR ANY PART THEREOF. 20 * 21 * In no event will Sun Microsystems, Inc. be liable for any lost revenue 22 * or profits or other special, indirect and consequential damages, even if 23 * Sun has been advised of the possibility of such damages. 24 * 25 * Sun Microsystems, Inc. 26 * 2550 Garcia Avenue 27 * Mountain View, California 94043 28 */ 29 /* 30 * warmstart.c 31 * Allows for gathering of registrations from an earlier dumped file. 32 * 33 * Copyright (c) 1990 by Sun Microsystems, Inc. 34 */ 35 36 /* 37 * @(#)warmstart.c 1.7 93/07/05 SMI 38 * $FreeBSD: src/usr.sbin/rpcbind/warmstart.c,v 1.4 2007/11/07 10:53:39 kevlo Exp $ 39 * $DragonFly$ 40 */ 41 #include <sys/types.h> 42 #include <sys/stat.h> 43 #include <stdio.h> 44 #include <rpc/rpc.h> 45 #include <rpc/rpcb_prot.h> 46 #include <rpc/xdr.h> 47 #ifdef PORTMAP 48 #include <netinet/in.h> 49 #include <rpc/pmap_prot.h> 50 #endif 51 #include <syslog.h> 52 #include <unistd.h> 53 54 #include "rpcbind.h" 55 56 /* 57 * XXX this code is unsafe and is not used. It should be made safe. 58 */ 59 60 61 /* These files keep the pmap_list and rpcb_list in XDR format */ 62 #define RPCBFILE "/tmp/rpcbind.file" 63 #ifdef PORTMAP 64 #define PMAPFILE "/tmp/portmap.file" 65 #endif 66 67 static bool_t write_struct(char *, xdrproc_t, void *); 68 static bool_t read_struct(char *, xdrproc_t, void *); 69 70 static bool_t 71 write_struct(char *filename, xdrproc_t structproc, void *list) 72 { 73 FILE *fp; 74 XDR xdrs; 75 mode_t omask; 76 77 omask = umask(077); 78 fp = fopen(filename, "w"); 79 if (fp == NULL) { 80 int i; 81 82 for (i = 0; i < 10; i++) 83 close(i); 84 fp = fopen(filename, "w"); 85 if (fp == NULL) { 86 syslog(LOG_ERR, 87 "cannot open file = %s for writing", filename); 88 syslog(LOG_ERR, "cannot save any registration"); 89 return (FALSE); 90 } 91 } 92 umask(omask); 93 xdrstdio_create(&xdrs, fp, XDR_ENCODE); 94 95 if (structproc(&xdrs, list) == FALSE) { 96 syslog(LOG_ERR, "rpcbind: xdr_%s: failed", filename); 97 fclose(fp); 98 return (FALSE); 99 } 100 XDR_DESTROY(&xdrs); 101 fclose(fp); 102 return (TRUE); 103 } 104 105 static bool_t 106 read_struct(char *filename, xdrproc_t structproc, void *list) 107 { 108 FILE *fp; 109 XDR xdrs; 110 struct stat sbuf; 111 112 if (stat(filename, &sbuf) != 0) { 113 fprintf(stderr, 114 "rpcbind: cannot stat file = %s for reading\n", filename); 115 goto error; 116 } 117 if ((sbuf.st_uid != 0) || (sbuf.st_mode & S_IRWXG) || 118 (sbuf.st_mode & S_IRWXO)) { 119 fprintf(stderr, 120 "rpcbind: invalid permissions on file = %s for reading\n", 121 filename); 122 goto error; 123 } 124 fp = fopen(filename, "r"); 125 if (fp == NULL) { 126 fprintf(stderr, 127 "rpcbind: cannot open file = %s for reading\n", filename); 128 goto error; 129 } 130 xdrstdio_create(&xdrs, fp, XDR_DECODE); 131 132 if (structproc(&xdrs, list) == FALSE) { 133 fprintf(stderr, "rpcbind: xdr_%s: failed\n", filename); 134 fclose(fp); 135 goto error; 136 } 137 XDR_DESTROY(&xdrs); 138 fclose(fp); 139 return (TRUE); 140 141 error: fprintf(stderr, "rpcbind: will start from scratch\n"); 142 return (FALSE); 143 } 144 145 void 146 write_warmstart(void) 147 { 148 write_struct(RPCBFILE, (xdrproc_t)xdr_rpcblist_ptr, &list_rbl); 149 #ifdef PORTMAP 150 write_struct(PMAPFILE, (xdrproc_t)xdr_pmaplist_ptr, &list_pml); 151 #endif 152 153 } 154 155 void 156 read_warmstart(void) 157 { 158 rpcblist_ptr tmp_rpcbl = NULL; 159 #ifdef PORTMAP 160 struct pmaplist *tmp_pmapl = NULL; 161 #endif 162 int ok1, ok2 = TRUE; 163 164 ok1 = read_struct(RPCBFILE, (xdrproc_t)xdr_rpcblist_ptr, &tmp_rpcbl); 165 if (ok1 == FALSE) 166 return; 167 #ifdef PORTMAP 168 ok2 = read_struct(PMAPFILE, (xdrproc_t)xdr_pmaplist_ptr, &tmp_pmapl); 169 #endif 170 if (ok2 == FALSE) { 171 xdr_free((xdrproc_t) xdr_rpcblist_ptr, (char *)&tmp_rpcbl); 172 return; 173 } 174 xdr_free((xdrproc_t) xdr_rpcblist_ptr, (char *)&list_rbl); 175 list_rbl = tmp_rpcbl; 176 #ifdef PORTMAP 177 xdr_free((xdrproc_t) xdr_pmaplist_ptr, (char *)&list_pml); 178 list_pml = tmp_pmapl; 179 #endif 180 } 181