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, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 * 26 * eftread.c -- routines for reading .eft files 27 * 28 */ 29 30 #pragma ident "%Z%%M% %I% %E% SMI" 31 32 #include <stdio.h> 33 #include <string.h> 34 #include <strings.h> 35 #include <time.h> 36 #include <unistd.h> 37 #include <errno.h> 38 #include <stdlib.h> 39 #include <alloca.h> 40 #include "out.h" 41 #include "stable.h" 42 #include "lut.h" 43 #include "tree.h" 44 #include "eft.h" 45 #include "eftread.h" 46 #include "esclex.h" 47 #include "version.h" 48 #include "ptree.h" 49 50 /* for uintX_t, htonl(), etc */ 51 #include <sys/types.h> 52 #include <netinet/in.h> 53 #include <inttypes.h> 54 55 static int Showheader; 56 57 /* 58 * eftread_showheader -- set showheader flag 59 * 60 */ 61 void 62 eftread_showheader(int newval) 63 { 64 Showheader = newval; 65 } 66 67 /* 68 * eftread_fopen -- fopen an EFT file for reading 69 * 70 */ 71 72 FILE * 73 eftread_fopen(const char *fname) 74 { 75 FILE *fp; 76 FILE *tfp; 77 struct eftheader hdr; 78 #define BUFLEN 8192 79 char buf[BUFLEN]; 80 int cc; 81 uint32_t csum = 0; 82 char *ptr; 83 84 if ((ptr = strrchr(fname, '.')) == NULL || strcmp(ptr, ".eft") != 0) { 85 out(O_ERR, "%s: not a valid EFT (bad extension)", fname); 86 return (NULL); 87 } 88 89 if ((fp = fopen(fname, "r")) == NULL) { 90 out(O_ERR|O_SYS, "%s", fname); 91 return (NULL); 92 } 93 94 if (fread(&hdr, 1, sizeof (hdr), fp) < sizeof (hdr)) { 95 (void) fclose(fp); 96 out(O_ERR, "%s: not a valid EFT (too short)", fname); 97 return (NULL); 98 } 99 hdr.magic = ntohl(hdr.magic); 100 hdr.major = ntohs(hdr.major); 101 hdr.minor = ntohs(hdr.minor); 102 hdr.cmajor = ntohs(hdr.cmajor); 103 hdr.cminor = ntohs(hdr.cminor); 104 hdr.identlen = ntohl(hdr.identlen); 105 hdr.dictlen = ntohl(hdr.dictlen); 106 hdr.csum = ntohl(hdr.csum); 107 108 if (Showheader) 109 out(O_VERB, "%s: magic %x EFT version %d.%d esc version %d.%d", 110 fname, hdr.magic, hdr.major, hdr.minor, 111 hdr.cmajor, hdr.cminor); 112 113 if (hdr.magic != EFT_HDR_MAGIC) { 114 (void) fclose(fp); 115 out(O_ERR, "%s: not a valid EFT (bad magic)", fname); 116 return (NULL); 117 } 118 119 if (hdr.major != EFT_HDR_MAJOR || hdr.minor > EFT_HDR_MINOR) { 120 (void) fclose(fp); 121 out(O_ERR, "%s is version %d.%d, " 122 "this program supports up to %d.%d", fname, 123 hdr.major, hdr.minor, EFT_HDR_MAJOR, EFT_HDR_MINOR); 124 return (NULL); 125 } 126 127 /* skip over ident strings */ 128 if (fseek(fp, (long)hdr.identlen, SEEK_CUR) == -1) 129 out(O_DIE|O_SYS, "%s: fseek", fname); 130 131 if (hdr.dictlen && (hdr.dictlen < 2 || hdr.dictlen > 1000)) { 132 (void) fclose(fp); 133 out(O_ERR, "%s: bad dictlen: %d", fname, hdr.dictlen); 134 return (NULL); 135 } 136 137 /* read in dict strings */ 138 if (hdr.dictlen) { 139 char *dbuf = alloca(hdr.dictlen); 140 char *dptr; 141 142 if ((cc = fread(dbuf, 1, hdr.dictlen, fp)) != hdr.dictlen) 143 out(O_DIE|O_SYS, "short fread on %s (dictlen %d)", 144 fname, hdr.dictlen); 145 146 /* work from end of string array backwards, finding names */ 147 for (dptr = &dbuf[hdr.dictlen - 2]; dptr > dbuf; dptr--) 148 if (*dptr == '\0') { 149 /* found separator, record string */ 150 Dicts = lut_add(Dicts, 151 (void *)stable(dptr + 1), (void *)0, NULL); 152 } 153 /* record the first string */ 154 Dicts = lut_add(Dicts, 155 (void *)stable(dptr), (void *)0, NULL); 156 } 157 158 if ((tfp = tmpfile()) == NULL) 159 out(O_DIE|O_SYS, "cannot create temporary file"); 160 161 while ((cc = fread(buf, 1, BUFLEN, fp)) > 0) { 162 char *ptr; 163 164 for (ptr = buf; ptr < &buf[cc]; ptr++) { 165 *ptr = ~((unsigned char)*ptr); 166 csum += (uint32_t)*ptr; 167 } 168 if (cc != fwrite(buf, 1, cc, tfp) || ferror(tfp)) 169 out(O_DIE|O_SYS, "fwrite on tmpfile"); 170 } 171 if (ferror(fp)) 172 out(O_DIE|O_SYS, "fread on %s", fname); 173 (void) fclose(fp); 174 175 if (hdr.csum != csum) { 176 out(O_ERR, "%s: bad checksum (%x != %x)", fname, 177 hdr.csum, csum); 178 (void) fclose(tfp); 179 return (NULL); 180 } 181 182 if (Showheader) { 183 int len = strlen(hdr.comment); 184 if (len > 0 && hdr.comment[len - 1] == '\n') 185 hdr.comment[len - 1] = '\0'; 186 out(O_OK, "%s:\n\t%s", fname, hdr.comment); 187 } 188 189 rewind(tfp); 190 191 return (tfp); 192 } 193