/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2008 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*
* eftread.c -- routines for reading .eft files
*
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include <stdio.h>
#include <string.h>
#include <strings.h>
#include <time.h>
#include <unistd.h>
#include <errno.h>
#include <stdlib.h>
#include <alloca.h>
#include "out.h"
#include "stable.h"
#include "lut.h"
#include "tree.h"
#include "eft.h"
#include "eftread.h"
#include "esclex.h"
#include "version.h"
#include "ptree.h"
/* for uintX_t, htonl(), etc */
#include <sys/types.h>
#include <netinet/in.h>
#include <inttypes.h>
#ifndef MIN
#define MIN(x, y) ((x) <= (y) ? (x) : (y))
#endif
static int Showheader;
/*
* eftread_showheader -- set showheader flag
*
*/
void
eftread_showheader(int newval)
{
Showheader = newval;
}
/*
* eftread_fopen -- fopen an EFT file for reading
*
*/
FILE *
eftread_fopen(const char *fname, char *idbuf, size_t idbufsz)
{
FILE *fp;
FILE *tfp;
struct eftheader hdr;
#define BUFLEN 8192
char buf[BUFLEN];
int cc;
uint32_t csum = 0;
char *ptr;
if ((ptr = strrchr(fname, '.')) == NULL || strcmp(ptr, ".eft") != 0) {
out(O_ERR, "%s: not a valid EFT (bad extension)", fname);
return (NULL);
}
if ((fp = fopen(fname, "r")) == NULL) {
out(O_ERR|O_SYS, "%s", fname);
return (NULL);
}
if (fread(&hdr, 1, sizeof (hdr), fp) < sizeof (hdr)) {
(void) fclose(fp);
out(O_ERR, "%s: not a valid EFT (too short)", fname);
return (NULL);
}
hdr.magic = ntohl(hdr.magic);
hdr.major = ntohs(hdr.major);
hdr.minor = ntohs(hdr.minor);
hdr.cmajor = ntohs(hdr.cmajor);
hdr.cminor = ntohs(hdr.cminor);
hdr.identlen = ntohl(hdr.identlen);
hdr.dictlen = ntohl(hdr.dictlen);
hdr.csum = ntohl(hdr.csum);
if (Showheader)
out(O_VERB, "%s: magic %x EFT version %d.%d esc version %d.%d",
fname, hdr.magic, hdr.major, hdr.minor,
hdr.cmajor, hdr.cminor);
if (hdr.magic != EFT_HDR_MAGIC) {
(void) fclose(fp);
out(O_ERR, "%s: not a valid EFT (bad magic)", fname);
return (NULL);
}
if (hdr.major != EFT_HDR_MAJOR || hdr.minor > EFT_HDR_MINOR) {
(void) fclose(fp);
out(O_ERR, "%s is version %d.%d, "
"this program supports up to %d.%d", fname,
hdr.major, hdr.minor, EFT_HDR_MAJOR, EFT_HDR_MINOR);
return (NULL);
}
bzero(idbuf, idbufsz);
if (hdr.identlen != 0) {
long npos = ftell(fp) + (long)hdr.identlen; /* after ident */
size_t rsz = MIN(hdr.identlen, idbufsz - 1);
if (fread(idbuf, 1, rsz, fp) != rsz)
out(O_DIE|O_SYS, "%s: fread", fname);
if (fseek(fp, npos, SEEK_SET) == -1)
out(O_DIE|O_SYS, "%s: fseek", fname);
}
if (hdr.dictlen && (hdr.dictlen < 2 || hdr.dictlen > 1000)) {
(void) fclose(fp);
out(O_ERR, "%s: bad dictlen: %d", fname, hdr.dictlen);
return (NULL);
}
/* read in dict strings */
if (hdr.dictlen) {
char *dbuf = alloca(hdr.dictlen);
char *dptr;
if ((cc = fread(dbuf, 1, hdr.dictlen, fp)) != hdr.dictlen)
out(O_DIE|O_SYS, "short fread on %s (dictlen %d)",
fname, hdr.dictlen);
/* work from end of string array backwards, finding names */
for (dptr = &dbuf[hdr.dictlen - 2]; dptr > dbuf; dptr--)
if (*dptr == '\0') {
/* found separator, record string */
Dicts = lut_add(Dicts,
(void *)stable(dptr + 1), (void *)0, NULL);
}
/* record the first string */
Dicts = lut_add(Dicts,
(void *)stable(dptr), (void *)0, NULL);
}
if ((tfp = tmpfile()) == NULL)
out(O_DIE|O_SYS, "cannot create temporary file");
while ((cc = fread(buf, 1, BUFLEN, fp)) > 0) {
char *ptr;
for (ptr = buf; ptr < &buf[cc]; ptr++) {
*ptr = ~((unsigned char)*ptr);
csum += (uint32_t)*ptr;
}
if (cc != fwrite(buf, 1, cc, tfp) || ferror(tfp))
out(O_DIE|O_SYS, "fwrite on tmpfile");
}
if (ferror(fp))
out(O_DIE|O_SYS, "fread on %s", fname);
(void) fclose(fp);
if (hdr.csum != csum) {
out(O_ERR, "%s: bad checksum (%x != %x)", fname,
hdr.csum, csum);
(void) fclose(tfp);
return (NULL);
}
if (Showheader) {
int len = strlen(hdr.comment);
if (len > 0 && hdr.comment[len - 1] == '\n')
hdr.comment[len - 1] = '\0';
out(O_OK, "%s:\n\t%s", fname, hdr.comment);
}
rewind(tfp);
return (tfp);
}