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 a earlier dumped file. 32 * 33 * Copyright (c) 1990 by Sun Microsystems, Inc. 34 */ 35 36 #ident "@(#)warmstart.c 1.7 93/07/05 SMI" 37 38 #include <sys/types.h> 39 #include <sys/stat.h> 40 #include <stdio.h> 41 #include <fcntl.h> 42 #include <err.h> 43 #include <rpc/rpc.h> 44 #include <rpc/rpcb_prot.h> 45 #include <rpc/xdr.h> 46 #ifdef PORTMAP 47 #include <netinet/in.h> 48 #include <rpc/pmap_prot.h> 49 #endif 50 #include <syslog.h> 51 #include <unistd.h> 52 53 #include "rpcbind.h" 54 55 /* 56 * XXX this code is unsafe and is not used. It should be made safe. 57 */ 58 #ifdef WARMSTART 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(const char *, xdrproc_t, void *); 68 static bool_t read_struct(const char *, xdrproc_t, void *); 69 70 static bool_t 71 write_struct(const char *filename, xdrproc_t structproc, void *list) 72 { 73 FILE *fp; 74 int fd; 75 XDR xdrs; 76 77 (void)unlink(filename); 78 fd = open(filename, O_WRONLY|O_CREAT|O_EXCL, S_IRUSR|S_IWUSR); 79 if (fd == -1 || (fp = fdopen(fd, "w")) == NULL) { 80 syslog(LOG_ERR, "Cannot open `%s' (%m)", filename); 81 syslog(LOG_ERR, "Cannot save any registration"); 82 return FALSE; 83 } 84 85 xdrstdio_create(&xdrs, fp, XDR_ENCODE); 86 87 if (structproc(&xdrs, list) == FALSE) { 88 syslog(LOG_ERR, "xdr_%s: failed", filename); 89 (void)fclose(fp); 90 return (FALSE); 91 } 92 XDR_DESTROY(&xdrs); 93 (void)fclose(fp); 94 return TRUE; 95 } 96 97 static bool_t 98 read_struct(const char *filename, xdrproc_t structproc, void *list) 99 { 100 FILE *fp; 101 XDR xdrs; 102 struct stat sbuf; 103 104 if (stat(filename, &sbuf) != 0) { 105 warn("Cannot stat `%s'", filename); 106 goto error; 107 } 108 if ((sbuf.st_uid != 0) || (sbuf.st_mode & S_IRWXG) || 109 (sbuf.st_mode & S_IRWXO)) { 110 warnx("Invalid permissions on `%s'", filename); 111 goto error; 112 } 113 fp = fopen(filename, "r"); 114 if (fp == NULL) { 115 warn("cannot open `%s'", filename); 116 goto error; 117 } 118 xdrstdio_create(&xdrs, fp, XDR_DECODE); 119 120 if (structproc(&xdrs, list) == FALSE) { 121 warnx("xdr_%s failed", filename); 122 (void)fclose(fp); 123 goto error; 124 } 125 XDR_DESTROY(&xdrs); 126 (void)fclose(fp); 127 return TRUE; 128 129 error: warnx("Will start from scratch"); 130 return FALSE; 131 } 132 133 void 134 write_warmstart(void) 135 { 136 (void)write_struct(RPCBFILE, xdr_rpcblist_ptr, &list_rbl); 137 #ifdef PORTMAP 138 (void)write_struct(PMAPFILE, xdr_pmaplist_ptr, &list_pml); 139 #endif 140 141 } 142 143 void 144 read_warmstart(void) 145 { 146 rpcblist_ptr tmp_rpcbl = NULL; 147 #ifdef PORTMAP 148 struct pmaplist *tmp_pmapl = NULL; 149 #endif 150 int ok1, ok2 = TRUE; 151 152 ok1 = read_struct(RPCBFILE, xdr_rpcblist_ptr, &tmp_rpcbl); 153 if (ok1 == FALSE) 154 return; 155 #ifdef PORTMAP 156 ok2 = read_struct(PMAPFILE, xdr_pmaplist_ptr, &tmp_pmapl); 157 #endif 158 if (ok2 == FALSE) { 159 xdr_free((xdrproc_t) xdr_rpcblist_ptr, (char *)&tmp_rpcbl); 160 return; 161 } 162 xdr_free((xdrproc_t) xdr_rpcblist_ptr, (char *)&list_rbl); 163 list_rbl = tmp_rpcbl; 164 #ifdef PORTMAP 165 xdr_free((xdrproc_t) xdr_pmaplist_ptr, (char *)&list_pml); 166 list_pml = tmp_pmapl; 167 #endif 168 } 169 #endif 170