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bcd05308aa75b2e193c21641fa808cb798195c99
nethack/util/dlb_main.c
nhmall bcd05308aa support version-specific dlb file 
There was a post-3.6.2 discussion on a forum where someone had
tried to copy the NetHack 3.6.2 exe file overtop of an
existing NetHack 3.6.0 playground, and then try to run it.

We have never suggested trying that, nor do we attempt to
provide any backward or forward compatibility between the
supporting files found in nhdat that would allow that. Any
particular version of NetHack expects to have matching
support files designed and matched to that version.

This adds optional support for helping to prevent the
opening of nhdat containing support files from an
unmatched version of NetHack.

If you #define VERSION_IN_DLB_FILENAME in your
platform's include/*conf.h file, it will use a
name such as nhdat362, instead of plain nhdat, and
will exit more gracefully than the fault/crash
mentioned in the discussion if it doesn't find the
file it is looking for.

Developers - please note that if you do
to cause NetHack to look for an nhdat* file with
the version info appended to the name, you will likely
have to modify your build/clean/spotless mechanics
beyond the C compile itself to properly deal with the
new generated file name.
2019-05-12 14:51:26 -04:00

551 lines
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/* NetHack 3.6 dlb_main.c $NHDT-Date: 1432512785 2015/05/25 00:13:05 $ $NHDT-Branch: master $:$NHDT-Revision: 1.10 $ */
/* Copyright (c) Kenneth Lorber, Bethesda, Maryland, 1993. */
/* NetHack may be freely redistributed. See license for details. */
/* data librarian; only useful if you are making the library version, DLBLIB
*/
#include "config.h"
#include "dlb.h"
#if !defined(O_WRONLY) && !defined(MAC) && !defined(AZTEC_C)
#include <fcntl.h>
#endif
#if defined(__DJGPP__)
#include <string.h>
#endif
static void FDECL(grow_ld, (libdir **, int *, int));
static void FDECL(xexit, (int));
#ifdef DLB
#ifdef DLBLIB
#define DLB_DIRECTORY "Directory" /* name of lib directory */
#define LIBLISTFILE "dlb.lst" /* default list file */
/* library functions (from dlb.c) */
extern boolean FDECL(open_library, (const char *, library *));
extern void FDECL(close_library, (library *));
char *FDECL(eos, (char *)); /* also used by dlb.c */
FILE *FDECL(fopen_datafile, (const char *, const char *));
static void FDECL(Write, (int, char *, long));
static void NDECL(usage);
static void NDECL(verbose_help);
static void FDECL(write_dlb_directory,
(int, int, libdir *, long, long, long));
static char default_progname[] = "dlb";
static char *progname = default_progname;
/* fixed library and list file names - can be overridden if necessary */
static const char *library_file = DLBFILE;
static const char *list_file = LIBLISTFILE;
#ifdef AMIGA
static char origdir[255] = "";
#endif
#ifndef O_BINARY
#define O_BINARY 0
#endif
#define DLB_FILES_ALLOC 200 /* initial # of files we'll handle; can grow */
#define DLB_VERS 1 /* version of dlb file we will write */
/*
* How the file is encoded within the library. Don't use a space
* because (at least) the SunOS 4.1.3 C library will eat the white
* space instead of preserving it like the man page says it should.
*/
#define ENC_NORMAL 'n' /* normal: not compressed in any way */
/*
* If you know tar, you have a small clue how to use this (note: - does
* NOT mean stdin/stdout).
*
* dlb COMMANDoptions arg... files...
* commands:
* dlb x extract all files
* dlb c build the archive
* dlb t list the archive
* options:
* v verbose
* f file specify archive file (default DLBFILE)
* I file specify file for list of files (default LIBLISTFILE)
* C dir chdir to dir (used ONCE, not like tar's -C)
*/
static void
usage()
{
(void) printf("Usage: %s [ctxCIfv] arguments... [files...]\n", progname);
(void) printf(" default library is %s\n", library_file);
(void) printf(" default list file is %s\n", list_file);
xexit(EXIT_FAILURE);
}
static void
verbose_help()
{
static const char *long_help[] = {
"", "dlb COMMANDoptions args... files...", " commands:",
" dlb ? print this text", " dlb h ditto",
" dlb x extract all files", " dlb c create the archive",
" dlb t list table of contents", " options:",
" v verbose operation",
" f file specify archive file name",
" I file specify file for list of file names",
" C dir change directory before processing any files", "",
(char *) 0
};
const char **str;
for (str = long_help; *str; str++)
(void) printf("%s\n", *str);
usage();
}
static void
Write(out, buf, len)
int out;
char *buf;
long len;
{
#if defined(MSDOS) && !defined(__DJGPP__)
unsigned short slen;
if (len > 65534) {
printf("%d Length specified for write() too large for 16 bit env.",
len);
xexit(EXIT_FAILURE);
}
slen = (unsigned short) len;
if (write(out, buf, slen) != slen) {
#else
if (write(out, buf, len) != len) {
#endif
printf("Write Error in '%s'\n", library_file);
xexit(EXIT_FAILURE);
}
}
char *
eos(s)
char *s;
{
while (*s)
s++;
return s;
}
/* open_library(dlb.c) needs this (which normally comes from src/files.c) */
FILE *
fopen_datafile(filename, mode)
const char *filename, *mode;
{
return fopen(filename, mode);
}
#endif /* DLBLIB */
#endif /* DLB */
int
main(argc, argv)
int argc;
char **argv;
{
#ifdef DLB
#ifdef DLBLIB
int i, r;
int ap = 2; /* argument pointer */
int cp; /* command pointer */
int iseen = 0, fseen = 0, verbose = 0; /* flags */
char action = ' ';
library lib;
if (argc > 0 && argv[0] && *argv[0])
progname = argv[0];
#ifdef VMS
progname = vms_basename(progname);
#endif
if (argc < 2) {
usage();
/* doesn't return */
}
for (cp = 0; argv[1][cp]; cp++) {
switch (argv[1][cp]) {
default:
usage(); /* doesn't return */
case '-': /* silently ignore */
break;
case '?':
case 'h':
verbose_help();
break;
case 'I':
if (ap == argc)
usage();
list_file = argv[ap++];
if (iseen)
printf("Warning: multiple I options. Previous ignored.\n");
iseen = 1;
break;
case 'f':
if (ap == argc)
usage();
library_file = argv[ap++];
#ifdef VERSION_IN_DLB_FILENAME
library_file = build_dlb_filename(library_file);
#endif
if (fseen)
printf("Warning: multiple f options. Previous ignored.\n");
fseen = 1;
break;
case 'C':
if (ap == argc)
usage();
#ifdef AMIGA
if (!getcwd(origdir, sizeof(origdir))) {
printf("Can't get current directory.\n");
xexit(EXIT_FAILURE);
}
#endif
if (chdir(argv[ap++])) {
printf("Can't chdir to %s\n", argv[--ap]);
xexit(EXIT_FAILURE);
}
break;
case 'v':
verbose = 1;
break;
case 't':
case 'c':
case 'x':
if (action != ' ') {
printf("Only one of t,x,c may be specified.\n");
usage();
}
action = argv[1][cp];
break;
}
}
if (argv[ap] && iseen) {
printf("Too many arguments.\n");
xexit(EXIT_FAILURE);
}
switch (action) {
default:
printf("Internal error - action.\n");
xexit(EXIT_FAILURE);
break;
case 't': /* list archive */
if (!open_library(library_file, &lib)) {
printf("Can't open dlb file\n");
xexit(EXIT_FAILURE);
}
for (i = 0; i < lib.nentries; i++) {
if (verbose)
printf("%-14s %6ld %6ld\n", lib.dir[i].fname,
lib.dir[i].foffset, lib.dir[i].fsize);
else
printf("%s\n", lib.dir[i].fname);
}
if (verbose)
printf("Revision:%ld File count:%ld String size:%ld\n", lib.rev,
lib.nentries, lib.strsize);
close_library(&lib);
xexit(EXIT_SUCCESS);
case 'x': { /* extract archive contents */
int f, n;
long remainder, total_read;
char buf[BUFSIZ];
if (!open_library(library_file, &lib)) {
printf("Can't open dlb file\n");
xexit(EXIT_FAILURE);
}
for (i = 0; i < lib.nentries; i++) {
if (argv[ap]) {
/* if files are listed, see if current is wanted */
int c;
for (c = ap; c < argc; c++)
if (!FILENAME_CMP(lib.dir[i].fname, argv[c]))
break;
if (c == argc)
continue; /* skip */
} else if (!FILENAME_CMP(lib.dir[i].fname, DLB_DIRECTORY)) {
/*
* Don't extract the directory unless the user
* specifically asks for it.
*
* Perhaps we should never extract the directory???
*/
continue;
}
fseek(lib.fdata, lib.dir[i].foffset, SEEK_SET);
f = open(lib.dir[i].fname,
O_WRONLY | O_TRUNC | O_BINARY | O_CREAT, 0640);
if (f < 0) {
printf("Can't create '%s'\n", lib.dir[i].fname);
xexit(EXIT_FAILURE);
}
/* read chunks from library and write them out */
total_read = 0;
do {
remainder = lib.dir[i].fsize - total_read;
if (remainder > (long) sizeof(buf))
r = (int) sizeof(buf);
else
r = remainder;
n = fread(buf, 1, r, lib.fdata);
if (n != r) {
printf("Read Error in '%s'\n", lib.dir[i].fname);
xexit(EXIT_FAILURE);
}
if (write(f, buf, n) != n) {
printf("Write Error in '%s'\n", lib.dir[i].fname);
xexit(EXIT_FAILURE);
}
total_read += n;
} while (total_read != lib.dir[i].fsize);
(void) close(f);
if (verbose)
printf("x %s\n", lib.dir[i].fname);
}
close_library(&lib);
xexit(EXIT_SUCCESS);
}
case 'c': /* create archive */
{
libdir *ld = 0;
int ldlimit = 0;
char buf[BUFSIZ];
int fd, out, nfiles = 0;
long dir_size, slen, flen, fsiz;
boolean rewrite_directory = FALSE;
/*
* Get names from either/both an argv list and a file
* list. This does not do any duplicate checking
*/
grow_ld(&ld, &ldlimit, DLB_FILES_ALLOC);
/* get file name in argv list */
if (argv[ap]) {
for (; ap < argc; ap++, nfiles++) {
if (nfiles == ldlimit)
grow_ld(&ld, &ldlimit, DLB_FILES_ALLOC / 5);
ld[nfiles].fname = (char *) alloc(strlen(argv[ap]) + 1);
Strcpy(ld[nfiles].fname, argv[ap]);
}
}
if (iseen) {
/* want to do a list file */
FILE *list = fopen(list_file, "r");
if (!list) {
printf("Can't open %s\n", list_file);
xexit(EXIT_FAILURE);
}
/* get file names, one per line */
for (; fgets(buf, sizeof(buf), list); nfiles++) {
if (nfiles == ldlimit)
grow_ld(&ld, &ldlimit, DLB_FILES_ALLOC / 5);
*(eos(buf) - 1) = '\0'; /* strip newline */
ld[nfiles].fname = (char *) alloc(strlen(buf) + 1);
Strcpy(ld[nfiles].fname, buf);
}
fclose(list);
}
if (nfiles == 0) {
printf("No files to archive\n");
xexit(EXIT_FAILURE);
}
/*
* Get file sizes and name string length. Don't include
* the directory information yet.
*/
for (i = 0, slen = 0, flen = 0; i < nfiles; i++) {
fd = open(ld[i].fname, O_RDONLY | O_BINARY, 0);
if (fd < 0) {
printf("Can't open %s\n", ld[i].fname);
xexit(EXIT_FAILURE);
}
ld[i].fsize = lseek(fd, 0, SEEK_END);
ld[i].foffset = flen;
slen += strlen(ld[i].fname); /* don't add null (yet) */
flen += ld[i].fsize;
close(fd);
}
/* open output file */
out =
open(library_file, O_RDWR | O_TRUNC | O_BINARY | O_CREAT, FCMASK);
if (out < 0) {
printf("Can't open %s for output\n", library_file);
xexit(EXIT_FAILURE);
}
/* caculate directory size */
dir_size = 40 /* header line (see below) */
+ ((nfiles + 1) * 11) /* handling+file offset+SP+newline */
+ slen + strlen(DLB_DIRECTORY); /* file names */
/* write directory */
write_dlb_directory(out, nfiles, ld, slen, dir_size, flen);
flen = 0L;
/* write each file */
for (i = 0; i < nfiles; i++) {
fd = open(ld[i].fname, O_RDONLY | O_BINARY, 0);
if (fd < 0) {
printf("Can't open input file '%s'\n", ld[i].fname);
xexit(EXIT_FAILURE);
}
if (verbose)
printf("%s\n", ld[i].fname);
fsiz = 0L;
while ((r = read(fd, buf, sizeof buf)) != 0) {
if (r == -1) {
printf("Read Error in '%s'\n", ld[i].fname);
xexit(EXIT_FAILURE);
}
if (write(out, buf, r) != r) {
printf("Write Error in '%s'\n", ld[i].fname);
xexit(EXIT_FAILURE);
}
fsiz += r;
}
(void) close(fd);
if (fsiz != ld[i].fsize)
rewrite_directory = TRUE;
/* in case directory rewrite is needed */
ld[i].fsize = fsiz;
ld[i].foffset = flen;
flen += fsiz;
}
if (rewrite_directory) {
if (verbose)
printf("(rewriting dlb directory info)\n");
(void) lseek(out, 0, SEEK_SET); /* rewind */
write_dlb_directory(out, nfiles, ld, slen, dir_size, flen);
}
for (i = 0; i < nfiles; i++)
free((genericptr_t) ld[i].fname), ld[i].fname = 0;
free((genericptr_t) ld), ldlimit = 0;
(void) close(out);
xexit(EXIT_SUCCESS);
}
}
#endif /* DLBLIB */
#endif /* DLB */
xexit(EXIT_SUCCESS);
/*NOTREACHED*/
return 0;
}
#ifdef DLB
#ifdef DLBLIB
static void
grow_ld(ld_p, ldlimit_p, alloc_incr)
libdir **ld_p;
int *ldlimit_p;
int alloc_incr;
{
static libdir zerolibdir;
int i = 0, newlimit = *ldlimit_p + alloc_incr;
libdir *newld = (libdir *) alloc(newlimit * sizeof *newld);
if (*ld_p) {
for (; i < *ldlimit_p; ++i)
newld[i] = (*ld_p)[i];
free((genericptr_t) *ld_p);
}
*ld_p = newld, *ldlimit_p = newlimit;
for (; i < *ldlimit_p; ++i)
(*ld_p)[i] = zerolibdir;
}
static void
write_dlb_directory(out, nfiles, ld, slen, dir_size, flen)
int out, nfiles;
libdir *ld;
long slen, dir_size, flen;
{
char buf[BUFSIZ];
int i;
sprintf(buf, "%3ld %8ld %8ld %8ld %8ld\n",
(long) DLB_VERS, /* version of dlb file */
(long) nfiles + 1, /* # of entries (includes directory) */
/* string length + room for nulls */
(long) slen + (long) strlen(DLB_DIRECTORY) + nfiles + 1,
(long) dir_size, /* start of first file */
(long) flen + dir_size); /* total file size */
Write(out, buf, strlen(buf));
/* write each file entry */
#define ENTRY_FORMAT "%c%s %8ld\n"
sprintf(buf, ENTRY_FORMAT, ENC_NORMAL, DLB_DIRECTORY, (long) 0);
Write(out, buf, strlen(buf));
for (i = 0; i < nfiles; i++) {
sprintf(buf, ENTRY_FORMAT, ENC_NORMAL, /* encoding */
ld[i].fname, /* name */
ld[i].foffset + dir_size); /* offset */
Write(out, buf, strlen(buf));
}
}
#endif /* DLBLIB */
#endif /* DLB */
static void
xexit(retcd)
int retcd;
{
#ifdef DLB
#ifdef AMIGA
if (origdir[0])
chdir(origdir);
#endif
#endif
exit(retcd);
}
#ifdef AMIGA
#include "date.h"
const char amiga_version_string[] = AMIGA_VERSION_STRING;
#endif
/*dlb_main.c*/
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