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ca6bbf8bc3c8efdf993adb9dd25f9694ee9cd369
nethack/util/dlb_main.c
nethack.rankin c0743f478a dlb capacity (trunk only) 
From the newsgroup:  if someone adds too many new special levels, dlb
creation during install will give a warning but still exit with success,
and the subsequent installation won't know that the excess files need to be
placed in the playground separately.  The result is that some files will
be missing when nethack tries to access them.  The newsgroup thread states
that slash'em increased dlb's default limit of 200 files to 300, and the
unnethack variant increased it to 250 and also changed the overflow message
into an error that causes 'make' to quit.  (The thread was initiated by
someone working on his own, not affiliated with either variant, who asked
for help figuring out why nethack couldn't find files at the end of the
alphabet.  My answer didn't help much; I thought he was working with
separate files rather than with a DLB container.)

     I started to go with the too-many-files-is-an-error fix, but instead
went the GNU route ("no arbitrary limits") and made the number of allowed
files become dynamic.  It starts at 200 and expands by increments of 40
when necessary.
2012-01-16 03:56:08 +00:00

542 lines
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/* NetHack 3.5 dlb_main.c $Date$ $Revision$ */
/* 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++];
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+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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