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