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
eftread_showheader(int newval)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 *
eftread_fopen(const char * fname,char * idbuf,size_t idbufsz)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