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 * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 * 25 * eftread.c -- routines for reading .eft files 26 * 27 */ 28 29 #pragma ident "%Z%%M% %I% %E% SMI" 30 31 #include <stdio.h> 32 #include <string.h> 33 #include <strings.h> 34 #include <time.h> 35 #include <unistd.h> 36 #include <errno.h> 37 #include <stdlib.h> 38 #include <alloca.h> 39 #include "out.h" 40 #include "stable.h" 41 #include "lut.h" 42 #include "tree.h" 43 #include "eft.h" 44 #include "eftread.h" 45 #include "esclex.h" 46 #include "version.h" 47 #include "ptree.h" 48 49 /* for uintX_t, htonl(), etc */ 50 #include <sys/types.h> 51 #include <netinet/in.h> 52 #include <inttypes.h> 53 54 #ifndef MIN 55 #define MIN(x, y) ((x) <= (y) ? (x) : (y)) 56 #endif 57 58 static int Showheader; 59 60 /* 61 * eftread_showheader -- set showheader flag 62 * 63 */ 64 void 65 eftread_showheader(int newval) 66 { 67 Showheader = newval; 68 } 69 70 /* 71 * eftread_fopen -- fopen an EFT file for reading 72 * 73 */ 74 75 FILE * 76 eftread_fopen(const char *fname, char *idbuf, size_t idbufsz) 77 { 78 FILE *fp; 79 FILE *tfp; 80 struct eftheader hdr; 81 #define BUFLEN 8192 82 char buf[BUFLEN]; 83 int cc; 84 uint32_t csum = 0; 85 char *ptr; 86 87 if ((ptr = strrchr(fname, '.')) == NULL || strcmp(ptr, ".eft") != 0) { 88 out(O_ERR, "%s: not a valid EFT (bad extension)", fname); 89 return (NULL); 90 } 91 92 if ((fp = fopen(fname, "r")) == NULL) { 93 out(O_ERR|O_SYS, "%s", fname); 94 return (NULL); 95 } 96 97 if (fread(&hdr, 1, sizeof (hdr), fp) < sizeof (hdr)) { 98 (void) fclose(fp); 99 out(O_ERR, "%s: not a valid EFT (too short)", fname); 100 return (NULL); 101 } 102 hdr.magic = ntohl(hdr.magic); 103 hdr.major = ntohs(hdr.major); 104 hdr.minor = ntohs(hdr.minor); 105 hdr.cmajor = ntohs(hdr.cmajor); 106 hdr.cminor = ntohs(hdr.cminor); 107 hdr.identlen = ntohl(hdr.identlen); 108 hdr.dictlen = ntohl(hdr.dictlen); 109 hdr.csum = ntohl(hdr.csum); 110 111 if (Showheader) 112 out(O_VERB, "%s: magic %x EFT version %d.%d esc version %d.%d", 113 fname, hdr.magic, hdr.major, hdr.minor, 114 hdr.cmajor, hdr.cminor); 115 116 if (hdr.magic != EFT_HDR_MAGIC) { 117 (void) fclose(fp); 118 out(O_ERR, "%s: not a valid EFT (bad magic)", fname); 119 return (NULL); 120 } 121 122 if (hdr.major != EFT_HDR_MAJOR || hdr.minor > EFT_HDR_MINOR) { 123 (void) fclose(fp); 124 out(O_ERR, "%s is version %d.%d, " 125 "this program supports up to %d.%d", fname, 126 hdr.major, hdr.minor, EFT_HDR_MAJOR, EFT_HDR_MINOR); 127 return (NULL); 128 } 129 130 bzero(idbuf, idbufsz); 131 if (hdr.identlen != 0) { 132 long npos = ftell(fp) + (long)hdr.identlen; /* after ident */ 133 size_t rsz = MIN(hdr.identlen, idbufsz - 1); 134 135 if (fread(idbuf, 1, rsz, fp) != rsz) 136 out(O_DIE|O_SYS, "%s: fread", fname); 137 if (fseek(fp, npos, SEEK_SET) == -1) 138 out(O_DIE|O_SYS, "%s: fseek", fname); 139 } 140 141 if (hdr.dictlen && (hdr.dictlen < 2 || hdr.dictlen > 1000)) { 142 (void) fclose(fp); 143 out(O_ERR, "%s: bad dictlen: %d", fname, hdr.dictlen); 144 return (NULL); 145 } 146 147 /* read in dict strings */ 148 if (hdr.dictlen) { 149 char *dbuf = alloca(hdr.dictlen); 150 char *dptr; 151 152 if ((cc = fread(dbuf, 1, hdr.dictlen, fp)) != hdr.dictlen) 153 out(O_DIE|O_SYS, "short fread on %s (dictlen %d)", 154 fname, hdr.dictlen); 155 156 /* work from end of string array backwards, finding names */ 157 for (dptr = &dbuf[hdr.dictlen - 2]; dptr > dbuf; dptr--) 158 if (*dptr == '\0') { 159 /* found separator, record string */ 160 Dicts = lut_add(Dicts, 161 (void *)stable(dptr + 1), (void *)0, NULL); 162 } 163 /* record the first string */ 164 Dicts = lut_add(Dicts, 165 (void *)stable(dptr), (void *)0, NULL); 166 } 167 168 if ((tfp = tmpfile()) == NULL) 169 out(O_DIE|O_SYS, "cannot create temporary file"); 170 171 while ((cc = fread(buf, 1, BUFLEN, fp)) > 0) { 172 char *ptr; 173 174 for (ptr = buf; ptr < &buf[cc]; ptr++) { 175 *ptr = ~((unsigned char)*ptr); 176 csum += (uint32_t)*ptr; 177 } 178 if (cc != fwrite(buf, 1, cc, tfp) || ferror(tfp)) 179 out(O_DIE|O_SYS, "fwrite on tmpfile"); 180 } 181 if (ferror(fp)) 182 out(O_DIE|O_SYS, "fread on %s", fname); 183 (void) fclose(fp); 184 185 if (hdr.csum != csum) { 186 out(O_ERR, "%s: bad checksum (%x != %x)", fname, 187 hdr.csum, csum); 188 (void) fclose(tfp); 189 return (NULL); 190 } 191 192 if (Showheader) { 193 int len = strlen(hdr.comment); 194 if (len > 0 && hdr.comment[len - 1] == '\n') 195 hdr.comment[len - 1] = '\0'; 196 out(O_OK, "%s:\n\t%s", fname, hdr.comment); 197 } 198 199 rewind(tfp); 200 201 return (tfp); 202 } 203