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jartool.c

/*
  jartool.c - main functions for fastjar utility
  Copyright (C) 2002, 2004, 2005, 2006  Free Software Foundation
  Copyright (C) 1999, 2000, 2001  Bryan Burns
  Copyright (C) 2007  Dalibor Topic
  
  This program is free software; you can redistribute it and/or
  modify it under the terms of the GNU General Public License
  as published by the Free Software Foundation; either version 2
  of the License, or (at your option) any later version.
  
  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.
  
  You should have received a copy of the GNU General Public License
  along with this program; if not, write to the Free Software
  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
*/

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <inttypes.h>
#include <stdint.h>

#include <zlib.h>

#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif

#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif

#include <stdio.h>
#include <sys/stat.h>
#include <sys/types.h>

#ifdef HAVE_SYS_PARAM_H
#include <sys/param.h>
#endif

#ifdef HAVE_DIRENT_H
#include <dirent.h>
#endif

#ifdef HAVE_FCNTL_H
#include <fcntl.h>
#endif

#include <string.h>
#include <errno.h>

#ifdef TM_IN_SYS_TIME
#include <sys/time.h>
#else
#include <time.h>
#endif

#include <getopt.h>
#include "regex.h"

#include "jartool.h"
#include "zipfile.h"
#include "dostime.h"
#include "pushback.h"
#include "compress.h"
#include "shift.h"
#include "argv.h"

/* Some systems have mkdir that takes a single argument.  */
#ifdef MKDIR_TAKES_ONE_ARG
# define mkdir(a,b) mkdir(a)
#endif


#ifdef WORDS_BIGENDIAN

#define L2BI(l) ((l & 0xff000000) >> 24) | \
            ((l & 0x00ff0000) >> 8)  | \
            ((l & 0x0000ff00) << 8)  | \
            ((l & 0x000000ff) << 24);

#define L2BS(l) ((l & 0xff00) >> 8) | ((l & 0x00ff) << 8);

#endif

#ifndef errno
extern int errno;
#endif

#ifndef O_BINARY
#define O_BINARY 0
#endif

struct ziplistentry
  {
      char* filename; 
    struct ziplistentry *next_entry;
  };

typedef struct ziplistentry ziplistentry;

static void exit_on_error(const char* message);
static void usage(const char*);
static void help(const char *);
static void version(void);
static void add_entry(struct zipentry *);
static void init_headers(void);

static void consume(pb_file *, size_t);
static int list_jar(int, const char**, int);
static int extract_jar(int, const char**, int);
static int add_file_to_jar(int, int, const char*, struct stat*, int);
static int add_to_jar(int, const char*, int);
static int add_to_jar_with_dir(int, const char*, const char*, int);
static int add_array_to_jar(int, char*, size_t, const char *, const int);
static int build_index(int);
static char* get_index_entry(char* fname);
static void add_list_entry(ziplistentry*);
static int create_central_header(int);
static int make_manifest(int, const char*, int);
static int read_entries (int);
static void init_args(const char **, int);
static const char *get_next_arg (void);
static void expand_options (int *argcp, char ***argvp);
static struct zipentry *find_entry (const char *);
static int looks_like_dir (const char *);

/* global variables */
static ub1 file_header[30];
static ub1 data_descriptor[16];
static int do_compress;
static int seekable;
static int verbose;
static char *jarfile;

/* If non zero, then don't recurse in directory. Instead, add the
   directory entry and relie on an explicit list of files to populate
   the archive. This option isn't supported by the original jar tool. */
static int use_explicit_list_only;

/* If non zero, then read the entry names from stdin. This option
   isn't supported by the original jar tool. */
static int read_names_from_stdin;

static zipentry *ziplist; /* linked list of entries */
static zipentry *ziptail; /* tail of the linked list */

static ziplistentry *ziplisthead;
static ziplistentry *ziplisttail;

static int number_of_entries; /* number of entries in the linked list */

/* What we go by. */
static const char *progname;

/* This is used to mark options with no short value.  */
#define LONG_OPT(Num)  ((Num) + 128)

#define OPT_HELP     LONG_OPT (0)

/* This holds all options.  */
#define OPTION_STRING "-ctxuvVf:m:C:0Mi:J:E@"

/* Define the MANIFEST content here to have it easier with calculations
   below.  This is for the case we create an empty MANIFEST.MF.  */
#define MANIFEST_STR "Manifest-Version: 1.0\nCreated-By: "
#define MANIFEST_END "\n\n"

static const struct option options[] =
{
  { "help", no_argument, NULL, OPT_HELP },
  { "version", no_argument, NULL, 'V' },
  { NULL, no_argument, NULL, 0 }
};

int main(int argc, char **argv)
{

  char *mfile = NULL;
  
  int action = ACTION_NONE;
  int manifest = TRUE;
  int opt;
  
  int jarfd = -1;
  
  /* These are used to collect file names and `-C' options for the
     second pass through the command line.  */
  int new_argc;
  const char **new_argv;

  progname = argv[0];

  do_compress = TRUE;
  verbose = FALSE;
  
  ziplist = NULL;
  
  number_of_entries = 0;
  
  if(argc < 2)
    usage(argv[0]);
  
  expandargv (&argc, &argv); /* expand @FILE parameters */
  new_argc = 0;
  new_argv = (const char **) malloc (argc * sizeof (char *));

  expand_options (&argc, &argv);
  while ((opt = getopt_long (argc, argv, OPTION_STRING,
                       options, NULL)) != -1) {
    switch(opt){
    case 'C':
      new_argv[new_argc++] = (const char *) "-C";
      /* ... fall through ... */
    case 1:
      /* File name or unparsed option, due to RETURN_IN_ORDER.  */
      new_argv[new_argc++] = optarg;
      break;
    case 'c':
      action = ACTION_CREATE;
      break;
    case 't':
      action = ACTION_LIST;
      break;
    case 'x':
      action = ACTION_EXTRACT;
      break;
    case 'u':
      action = ACTION_UPDATE;
      break;
    case 'v':
      verbose = TRUE;
      break;
    case 'V':
      version();
      break;
    case 'f':
      jarfile = optarg;
      break;
    case 'm':
      mfile = optarg;
      break;
    case '0':
      do_compress = FALSE;
      break;
    case 'M':
      manifest = FALSE;
      break;
    case 'i':
      action = ACTION_INDEX;
      jarfile = optarg;
      break;
    case 'J':
      /* ignored */
      break;
    case OPT_HELP:
      help(argv[0]);
      break;

    /* The following options aren't supported by the original jar tool. */
    case 'E':
      use_explicit_list_only = TRUE;
      break;
    case '@':
      read_names_from_stdin = TRUE;
      break;
    default:
      usage(argv[0]);
    }
  }


  /* We might have seen `--'.  In this case we want to make sure that
     all following options are handled as file names.  */
  while (optind < argc)
    new_argv[new_argc++] = argv[optind++];
  new_argv[new_argc] = NULL;

  if(action == ACTION_NONE){
    fprintf(stderr, "%s: one of options -{ctxui} must be specified.\n",
          progname);
    usage(argv[0]);
  }

  /* Verify unsupported combinations and warn of the use of non
     standard features */
  if(verbose && use_explicit_list_only)
    fprintf (stderr, "Warning: using non standard '-E' option\n");
  if(verbose && read_names_from_stdin)
    fprintf (stderr, "Warning: using non standard '-@' option\n");
  if(read_names_from_stdin
      && (action != ACTION_CREATE && action != ACTION_UPDATE)){
      fprintf(stderr, "%s: option '-@' is supported only with '-c' or '-u'.\n",
            progname);
      usage(argv[0]);
  }

  /* create the jarfile */
  if(action == ACTION_CREATE){
    if(jarfile){
      jarfd = open(jarfile, O_CREAT | O_BINARY | O_WRONLY | O_TRUNC, 0666);

      if(jarfd < 0){
        fprintf(stderr, "%s: error opening %s for writing: %s\n", progname,
            jarfile, strerror (errno));
        exit(EXIT_FAILURE);
      }
      
      /* We assume that the file is seekable */
      seekable = TRUE;
      
    } else {
      
      jarfd = STDOUT_FILENO;  /* jarfd is stdout otherwise */
      
      /* standard out is not seekable */
      seekable = FALSE;
      
      /* don't want our output to be part of the jar file.. figured this one
         out the hard way.. =P */
      verbose = FALSE;
    }
  } else if(action == ACTION_LIST || action == ACTION_EXTRACT){

    if(jarfile){
      jarfd = open(jarfile, O_RDONLY | O_BINARY);

      if(jarfd < 0){
        fprintf(stderr, "%s: error opening %s for reading: %s\n", progname,
            jarfile, strerror (errno));
        exit(EXIT_FAILURE);
      }

      seekable = TRUE;
    } else {
      jarfd = STDIN_FILENO; /* jarfd is standard in */

      /* we assume that the stream isn't seekable for safety */
      seekable = FALSE;
    }
  }

  if (action == ACTION_UPDATE || action == ACTION_INDEX)
    {
      if (!jarfile)
      {
        fprintf (stderr, "%s: `-u' mode requires a file name\n",
               argv[0]);
        exit(EXIT_FAILURE);
      }

      if ((jarfd = open (jarfile, O_RDWR | O_BINARY)) < 0)
      {
        fprintf (stderr, "Error opening %s for reading!\n", jarfile);
        exit_on_error (jarfile);
      }

      /* Assert that jarfd is seekable. */
      if (lseek (jarfd, 0, SEEK_CUR) == -1)
      {
        fprintf (stderr, "%s: %s is not seekable\n", argv[0], jarfile);
        exit(EXIT_FAILURE);
      }

      seekable = TRUE;
    }

  if(action == ACTION_CREATE || action == ACTION_UPDATE){
    const char *arg;
    init_headers();

    if(do_compress)
      init_compression();

    if (action == ACTION_UPDATE)
      {
      if (read_entries (jarfd))
        exit(EXIT_FAILURE);
      }

    /* Add the META-INF/ directory and the manifest */
    if(manifest && mfile)
      make_manifest(jarfd, mfile, action == ACTION_UPDATE);
    else if(manifest && action == ACTION_CREATE)
      make_manifest(jarfd, NULL, FALSE);

    init_args (new_argv, 0);
    /* now we add the files to the archive */
    while ((arg = get_next_arg ())){

      if(!strcmp(arg, "-C")){
      const char *dir_to_change = get_next_arg ();
      const char *file_to_add = get_next_arg ();
        if (!dir_to_change || !file_to_add) {
          fprintf(stderr, "%s: error: missing argument for -C.\n", progname);
          exit(EXIT_FAILURE);
        }
      if (add_to_jar_with_dir(jarfd, dir_to_change, file_to_add,
                        action == ACTION_UPDATE))
        {
          fprintf(stderr,
                "Error adding %s (in directory %s) to jar archive!\n",
                file_to_add, dir_to_change);
          exit(EXIT_FAILURE);
        }
      } else {
        if(add_to_jar(jarfd, arg, action == ACTION_UPDATE)){
          fprintf(stderr, "Error adding %s to jar archive!\n", arg);
          exit(EXIT_FAILURE);
        }
      }
    }
    /* de-initialize the compression DS */
    if(do_compress)
      end_compression();

    if (action == ACTION_UPDATE)
      lseek (jarfd, end_of_entries, SEEK_SET);
    
    create_central_header(jarfd);

    /* Check if the file shrunk when we updated it. */
    if (action == ACTION_UPDATE)
#ifdef HAVE_FTRUNCATE
      if (-1 == ftruncate (jarfd, lseek (jarfd, 0, SEEK_CUR)))
      exit_on_error("ftruncate");
#else
      _chsize (jarfd, lseek (jarfd, 0, SEEK_CUR));
#endif

    if (jarfd != STDIN_FILENO && close(jarfd) != 0) {
      fprintf(stderr, "%s: error closing jar archive: %s\n",
            progname, strerror (errno));
      exit(EXIT_FAILURE);
    }
  } else if(action == ACTION_LIST){
    list_jar(jarfd, &new_argv[0], new_argc);
  } else if(action == ACTION_EXTRACT){
    extract_jar(jarfd, &new_argv[0], new_argc);
  } else if(action == ACTION_INDEX){
    ziplisthead = NULL;
    ziplisttail = NULL;
      
    init_headers();

    if(do_compress)
      init_compression();

    if (read_entries (jarfd))
      exit(EXIT_FAILURE);

    build_index(jarfd);
      
    /* de-initialize the compression DS */
    if(do_compress)
      end_compression();

    lseek (jarfd, end_of_entries, SEEK_SET);
    
    create_central_header(jarfd);

#ifdef HAVE_FTRUNCATE
    if (-1 == ftruncate (jarfd, lseek (jarfd, 0, SEEK_CUR)))
      exit_on_error("ftruncate");
#else
    _chsize (jarfd, lseek (jarfd, 0, SEEK_CUR));
#endif

    if (jarfd != STDIN_FILENO && close(jarfd) != 0) {
      fprintf(stderr, "%s: error closing jar archive: %s\n",
            progname, strerror (errno));
      exit(EXIT_FAILURE);
    }
      
  }
  
  exit(EXIT_SUCCESS);
}

static void
exit_on_error(const char* message)
{
  perror(message);
  exit(EXIT_FAILURE);
}

static int args_current_g;
static const char **args_g;

static void 
init_args(const char **args, int current)
{
  if(!read_names_from_stdin)
    {
      args_g = args;
      args_current_g = current;
    }
}

static const char *
get_next_arg (void)
{
  static int reached_end = 0;

  if (reached_end)
    return NULL;

  if (args_g)
    {
      if (!args_g [args_current_g])
      {
        reached_end = 1;
        return NULL;
      }
      return args_g [args_current_g++];
    }
  else
    {
      /* Read the name from stdin. Delimiters are '\n' and
       '\r'. Reading EOF indicates that we don't have anymore file
       names characters to read. */

      char *s;
      size_t  pos = 0;
      size_t len = 1024; /* Allocate more memory when we hit this
                      limit.  */

      s = (char *) malloc (len);
      if (s == NULL)
      exit_on_error("malloc");

      /* Get rid of '\n' and '\r' first. */
      while (1)
      {
        int c = getc (stdin);
        if (c == '\n' || c == '\r')
          continue;
        else
          {
            if (c == EOF)
            return NULL;
            ungetc (c, stdin);
            break;
          }
      }

      while (1)
      {
        int c = getc (stdin);
        /* Exit when we get a delimiter or don't have any characters
             to read */
        if (c == '\n'|| c == '\r'|| c == EOF)
          break;
        s [pos] = (char) c;
        pos++;
        if (pos >= len)
          {
            len *= 2;
            s = (char *) realloc (s, len);
            if (s == NULL)
              exit_on_error ("realloc");
          }
      }

      if (pos)
      {
        s [pos] = '\0';
        return strdup (s);
      }
      else
      return NULL;
    }
}

void init_headers(void)
{
  /* packing file header */
  /* magic number */
  file_header[0] = 0x50;
  file_header[1] = 0x4b;
  file_header[2] = 0x03;
  file_header[3] = 0x04;
  /* version number (Unix 1.0)*/
  file_header[4] = 10;
  file_header[5] = 0;
  /* bit flag (normal deflation)*/
  file_header[6] = 0x00;

  file_header[7] = 0x00;
  /* do_compression method (deflation) */
  file_header[8] = 0;
  file_header[9] = 0;

  /* last mod file time (MS-DOS format) */
  file_header[10] = 0;
  file_header[11] = 0;
  /* last mod file date (MS-DOS format) */
  file_header[12] = 0;
  file_header[13] = 0;
  /* CRC 32 */
  file_header[14] = 0;
  file_header[15] = 0;
  file_header[16] = 0;
  file_header[17] = 0;
  /* compressed size */
  file_header[18] = 0;
  file_header[19] = 0;
  file_header[20] = 0;
  file_header[21] = 0;
  /* uncompressed size */
  file_header[22] = 0;
  file_header[23] = 0;
  file_header[24] = 0;
  file_header[25] = 0;
  /* filename length */
  file_header[26] = 0;
  file_header[27] = 0;
  /* extra field length */
  file_header[28] = 0;
  file_header[29] = 0;

  /* Initialize the compression DS */
  PACK_UB4(data_descriptor, 0, 0x08074b50);
  
}

void add_entry(struct zipentry *ze)
{

  if(ziplist == NULL){
    ziplist = ze;
    ziptail = ziplist;
  } else {
    ziplist->next_entry = ze;
    ziplist = ze;
  }
  
  number_of_entries++;
}

static struct zipentry *
find_entry (const char *fname)
{
  struct zipentry *ze;

  for (ze = ziptail; ze; ze = ze->next_entry)
    {
      if (!strcmp (ze->filename, fname))
      return ze;
    }
  return NULL;
}


static int
looks_like_dir (const char *fname)
{
  struct zipentry *ze;
  size_t len = strlen (fname);

  for (ze = ziptail; ze; ze = ze->next_entry)
    {
      if (strlen (ze->filename) > len
        && !strncmp (fname, ze->filename, len)
        && ze->filename[len] == '/')
      return 1;
    }
  return 0;
}


/*
 * Read the zip entries of an existing file, building `ziplist' as we go.
 */
static
int read_entries (int fd)
{
  struct zipentry *ze;
  ub1 intbuf[4];
  ub1 header[46];
  ub2 len;
  ub2 count, i;
  off_t offset;

  if (lseek (fd, -22, SEEK_END) == -1)
    {
      fprintf (stderr, "%s: %s: can't seek file\n", progname, jarfile);
      return 1;
    }

  if (read (fd, intbuf, 4) < 4)
    {
      perror (progname);
      return 1;
    }
  /* Is there a zipfile comment? */
  while (UNPACK_UB4(intbuf, 0) != 0x06054b50)
    {
      if (lseek (fd, -5, SEEK_CUR) == -1 ||
        read (fd, intbuf, 4) != 4)
      {
        fprintf (stderr, "%s: can't find end of central directory: %s\n",
               progname, strerror (errno));
        return 1;
      }
    }

  /* Skip disk numbers. */
  if (lseek (fd, 6, SEEK_CUR) == -1)
    {
      perror (progname);
      return 1;
    }

  /* Number of entries in the central directory. */
  if (read (fd, intbuf, 2) != 2)
    {
      perror (progname);
      return 1;
    }
  count = UNPACK_UB2(intbuf, 0);

  if (lseek (fd, 4, SEEK_CUR) == -1)
    {
      perror (progname);
      return 1;
    }

  /* Offset where the central directory begins. */
  if (read (fd, intbuf, 4) != 4)
    {
      perror (progname);
      return 1;
    }
  offset = UNPACK_UB4(intbuf, 0);
  end_of_entries = offset;

  if (lseek (fd, offset, SEEK_SET) != offset)
    {
      perror (progname);
      return 1;
    }

  if (read (fd, header, 46) != 46)
    {
      fprintf (stderr, "%s: %s: unexpected end of file\n",
             progname, jarfile);
      return 1;
    }

  for (i = 0; i < count; i++)
    {
      if (UNPACK_UB4(header, 0) != 0x02014b50)
      {
        fprintf (stderr, "%s: can't find central directory header\n",
               progname);
        return 1;
      }
      ze = (struct zipentry *) malloc (sizeof (struct zipentry));
      if (!ze)
      {
        perror (progname);
        return 1;
      }
      memset (ze, 0, sizeof (struct zipentry));
      ze->flags = UNPACK_UB2(header, CEN_FLAGS);
      ze->mod_time = UNPACK_UB2(header, CEN_MODTIME);
      ze->mod_date = UNPACK_UB2(header, CEN_MODDATE);
      ze->crc = UNPACK_UB4(header, CEN_CRC);
      ze->usize = UNPACK_UB4(header, CEN_USIZE);
      ze->csize = UNPACK_UB4(header, CEN_CSIZE);
      ze->offset = UNPACK_UB4(header, CEN_OFFSET);
      ze->compressed = (header[CEN_COMP] || header[CEN_COMP+1]);
      len = UNPACK_UB2(header, CEN_FNLEN);
      ze->filename = (char *) malloc ((len+1) * sizeof (char));
      if (!ze->filename)
      {
        perror (progname);
        return 1;
      }
      if (read (fd, ze->filename, len) != len)
      {
        fprintf (stderr, "%s: %s: unexpected end of file\n",
               progname, jarfile);
        return 1;
      }
      len = UNPACK_UB4(header, CEN_EFLEN);
      len += UNPACK_UB4(header, CEN_COMLEN);
      if (lseek (fd, len, SEEK_CUR) == -1)
      {
        perror (progname);
        return 1;
      }
      add_entry (ze);
      if (i < count - 1)
      {
        if (read (fd, header, 46) != 46)
          {
            fprintf (stderr, "%s: %s: unexpected end of file\n",
                   progname, jarfile);
            return 1;
          }
      }
    }

  lseek (fd, 0, SEEK_SET);
  return 0;
}

int make_manifest(int jfd, const char *mf_name, int updating)
{
  time_t current_time;
  size_t nlen;   /* length of file name */
  int mod_time; /* file modification time */
  struct zipentry *ze;

  mod_time = unix2dostime(&current_time);  
  
  /* If we are creating a new manifest, create a META-INF directory entry */
  if (0 == updating) {
    nlen = 9;  /* trust me on this one */

    memset((file_header + 12), '\0', 16); /*clear mod time, crc, size fields*/
  
    current_time = time(NULL);
    if(current_time == (time_t)-1)
      exit_on_error("time");

    PACK_UB2(file_header, LOC_EXTRA, 0);
    PACK_UB2(file_header, LOC_COMP, 0);
    PACK_UB2(file_header, LOC_FNLEN, nlen);
    PACK_UB4(file_header, LOC_MODTIME, mod_time);
  
    if(verbose)
      printf("adding: META-INF/ (in=0) (out=0) (stored 0%%)\n");
  
    ze = (zipentry*)malloc(sizeof(zipentry));
    if(ze == NULL)
      exit_on_error("malloc");
  
    memset(ze, 0, sizeof(zipentry)); /* clear all the fields*/
    ze->filename = strdup("META-INF/");
    if (NULL == ze->filename)
      exit_on_error("strdup");

    ze->offset = lseek(jfd, 0, SEEK_CUR);
    ze->mod_time = (ub2)(mod_time & 0x0000ffff);
    ze->mod_date = (ub2)((mod_time & 0xffff0000) >> 16);
    ze->compressed = FALSE;

    add_entry(ze);

    if (-1 == write(jfd, file_header, 30))
      exit_on_error("write");
    if (-1 == write(jfd, "META-INF/", nlen))
      exit_on_error("write");
  }

  /* if the user didn't specify an external manifest file... */
  if(mf_name == NULL){
    
    size_t mf_len = strlen(MANIFEST_STR) + strlen(VERSION) + strlen(MANIFEST_END);
    char *mf;

    if((mf = (char *) malloc(mf_len + 1))) {
    uLong crc;

    snprintf(mf, mf_len + 1, "%s%s%s", MANIFEST_STR, VERSION, MANIFEST_END);

    crc = crc32(0L, Z_NULL, 0);
    
    crc = crc32(crc, (const unsigned char *)mf, mf_len);

    nlen = 20;  /* once again, trust me */

    PACK_UB2(file_header, LOC_EXTRA, 0);
    PACK_UB2(file_header, LOC_COMP, 0);
    PACK_UB2(file_header, LOC_FNLEN, nlen);
    PACK_UB4(file_header, LOC_USIZE, mf_len);
    
    memcpy((file_header + LOC_CSIZE), (file_header + LOC_USIZE), 4);
    
    PACK_UB4(file_header, LOC_CRC, crc);

    if(verbose)
      printf("adding: META-INF/MANIFEST.MF (in=56) (out=56) (stored 0%%)\n");
    
    ze = (zipentry*)malloc(sizeof(zipentry));
    if(ze == NULL)
      exit_on_error("malloc");
    
    memset(ze, 0, sizeof(zipentry)); /* clear all the fields*/
    ze->filename = strdup("META-INF/MANIFEST.MF");
    if (NULL == ze->filename)
      exit_on_error("strdup");
    
    ze->offset = lseek(jfd, 0, SEEK_CUR);
    ze->mod_time = (ub2)(mod_time & 0x0000ffff);
    ze->mod_date = (ub2)((mod_time & 0xffff0000) >> 16);
    ze->crc = crc;
    ze->csize = mf_len;
    ze->usize = ze->csize;
    ze->compressed = FALSE;
    
    add_entry(ze);
    
    if (-1 == write(jfd, file_header, 30))
      exit_on_error("write");
    if (-1 == write(jfd, "META-INF/MANIFEST.MF", nlen))
      exit_on_error("write");
    if (-1 == write(jfd, mf, mf_len))
      exit_on_error("write");
    free(mf);
    }
    else {
      printf("malloc errror\n");
      exit(EXIT_FAILURE);
    }
  } else {
    int mfd;
    struct stat statbuf;

    stat(mf_name, &statbuf);

    if(!S_ISREG(statbuf.st_mode)){
      fprintf(stderr, "Invalid manifest file specified.\n");
      exit(EXIT_FAILURE);
    }
  
    mfd = open(mf_name, O_RDONLY | O_BINARY);

    if(mfd < 0){
      fprintf(stderr, "Error opening %s.\n", mf_name);
      exit(EXIT_FAILURE);
    }

    if(add_file_to_jar(jfd, mfd, "META-INF/MANIFEST.MF", &statbuf, updating))
      exit_on_error("error writing to jar");
  }

  return 0;
}

/* Implements -C by wrapping add_to_jar.  new_dir is the directory 
   to switch to.

   `updating', if nonzero, will indicate that we are updating an
   existing file, and will need to take special care. If set, we will
   also expect that the linked list of zip entries will be filled in
   with the jar file's current contents.
 */
int 
add_to_jar_with_dir (int fd, const char* new_dir, const char* file,
                 const int updating)
{
  int retval;
  char *old_dir; 
  size_t old_dir_len = 1024;
  
  old_dir = (char *) malloc (old_dir_len);
  if (old_dir == NULL)
      exit_on_error ("malloc");

  while (1)
    {
      if (getcwd (old_dir, old_dir_len) == old_dir)
      break;
      if (old_dir == NULL) 
      {
        perror ("getcwd");
        return 1;
      }
      old_dir_len *= 2;
      old_dir = (char *) realloc (old_dir, old_dir_len); 
      if (old_dir == NULL)
        exit_on_error ("realloc");
    }

  if (chdir(new_dir) == -1) {
    perror(new_dir);
    return 1;
  }
  retval=add_to_jar(fd, file, updating);
  if (chdir(old_dir) == -1) {
    perror(old_dir);
    return 1;
  }
  return retval;
}

int 
add_to_jar (int fd, const char *file, const int updating)
{
  struct stat statbuf;
  DIR *dir;
  struct dirent *de;
  zipentry *ze;
  zipentry *existing = NULL;
  int stat_return;

  /* This is a quick compatibility fix -- Simon Weijgers <simon@weijgers.com> 
   * It fixes this:
   *   "normal" jar : org/apache/java/io/LogRecord.class
   *   fastjar      : ./org/apache/java/io/LogRecord.class
   * Fastjar's preservation of the ./'s makes the jarfile unusuable for use 
   * with both kaffe-1.0b4 and JDK.
   */
  while (*file=='.' && *(file+1)=='/')
    file+=2;
  
  if(jarfile && !strcmp(file, jarfile)){
    if(verbose)
      printf("skipping: %s\n", file);
    return 0;  /* we don't want to add ourselves.. */
  }

  stat_return = stat(file, &statbuf);
  
  if(stat_return == -1){
    perror(file);
    return 1;
  } else if(S_ISDIR(statbuf.st_mode)){
    char *fullname;
    char *t_ptr;
    size_t nlen;
    unsigned long mod_time;

    dir = opendir(file);
    
    if(dir == NULL){
      perror("opendir");
      return 1;
    }
    
    nlen = strlen(file) + 256;
    fullname = (char*)malloc(nlen * sizeof(char));

    if(fullname == NULL){
      fprintf(stderr, "Filename is NULL!\n");
      return 1;
    }

    memset(fullname, 0, (nlen * sizeof(char)));
    strncpy(fullname, file, nlen - 1);

    nlen = strlen(file);

    if(fullname[nlen - 1] != '/'){
      fullname[nlen] = '/';
      t_ptr = (fullname + nlen + 1);
    } else
      t_ptr = (fullname + nlen);


    memset((file_header + 12), '\0', 16); /*clear mod time, crc, size fields*/
    
    nlen = (t_ptr - fullname);

    mod_time = unix2dostime(&statbuf.st_mtime);

    PACK_UB2(file_header, LOC_EXTRA, 0);
    PACK_UB2(file_header, LOC_COMP, 0);
    PACK_UB2(file_header, LOC_FNLEN, nlen);
    PACK_UB4(file_header, LOC_MODTIME, mod_time);

    ze = (zipentry*)malloc(sizeof(zipentry));
    if(ze == NULL)
      exit_on_error("malloc");

    memset(ze, 0, sizeof(zipentry)); /* clear all the fields*/
    ze->filename = strdup(fullname);
    
    ze->offset = lseek(fd, 0, SEEK_CUR);
    ze->mod_time = (ub2)(mod_time & 0x0000ffff);
    ze->mod_date = (ub2)((mod_time & 0xffff0000) >> 16);
    ze->compressed = FALSE;

    if (updating)
      {
      if ((existing = find_entry (ze->filename)) != NULL)
        {
          if (existing->usize != 0)
            {
            /* XXX overwriting non-directory with directory? */
            fprintf (stderr, "%s: %s: can't overwrite non-directory with directory\n",
                   progname, fullname);
            return 1;
            }
        }
      if (lseek (fd, end_of_entries, SEEK_SET) == -1)
        {
          fprintf (stderr, "%s %d\n", __FILE__, __LINE__);
          perror ("lseek");
          return 1;
        }
      }

    if (!existing)
      {
      add_entry (ze);
      if (-1 == write (fd, file_header, 30))
        exit_on_error("write");
      if (-1 == write (fd, fullname, nlen))
        exit_on_error("write");
      end_of_entries = lseek (fd, 0, SEEK_CUR);

      if (verbose)
        printf ("adding: %s (in=%d) (out=%d) (stored 0%%)\n", fullname, 0, 0);
      }

    while(!use_explicit_list_only && (de = readdir(dir)) != NULL){
      if(de->d_name[0] == '.')
        continue;
      if(jarfile && !strcmp(de->d_name, jarfile)){
      /* we don't want to add ourselves.  Believe me */
        if(verbose)
          printf("skipping: %s\n", de->d_name);
        continue;
      }

      strcpy(t_ptr, de->d_name);

      if (add_to_jar(fd, fullname, updating)) {
        fprintf(stderr, "Error adding file to jar!\n");
        return 1;
      }
    }

    free(fullname);
    closedir(dir);
      
  } else if(S_ISREG(statbuf.st_mode)){
    int add_fd;

    add_fd = open(file, O_RDONLY | O_BINARY);
    if(add_fd < 0){
      fprintf(stderr, "Error opening %s.\n", file);
      return 1;
    }
    
    if(add_file_to_jar(fd, add_fd, file, &statbuf, updating)){
      fprintf(stderr, "Error adding file to jar!\n");
      return 1;
    }
    
  } else {
    fprintf(stderr, "Illegal file specified: %s\n", file);
  }
  return 0;
}

int add_file_to_jar(int jfd, int ffd, const char *fname, struct stat *statbuf,
                const int updating)
{
  size_t file_name_length;
  unsigned long mod_time;
  ub1 rd_buff[RDSZ];
  uLong crc = 0;
  off_t offset = 0;
  int rdamt;
  struct zipentry *ze;
  struct zipentry *existing = NULL;

  if (updating)
    {
      existing = find_entry (fname);
      if (existing && looks_like_dir (fname))
      {
        fprintf (stderr, "%s: %s is a directory in the archive\n",
               progname, fname);
        return 1;
      }
    }

  mod_time = unix2dostime(&(statbuf->st_mtime));
  file_name_length = strlen(fname);

  if(!seekable && !do_compress){
    crc = crc32(0L, Z_NULL, 0); 
    
    while((rdamt = read(ffd, rd_buff, RDSZ)) != 0) 
      crc = crc32(crc, rd_buff, rdamt); 
    
    lseek(ffd, 0, SEEK_SET);
  }
  
  /* data descriptor */
  if(!seekable && do_compress){
    PACK_UB2(file_header, LOC_EXTRA, 8);
  } else {
    PACK_UB2(file_header, LOC_EXTRA, 0);
  }
  
  if(do_compress){
    PACK_UB2(file_header, LOC_COMP, 8);
  } else {
    PACK_UB2(file_header, LOC_COMP, 0);
  }
    
  PACK_UB4(file_header, LOC_MODTIME, mod_time);
  PACK_UB2(file_header, LOC_FNLEN, file_name_length);
  
  if(!seekable && !do_compress){
    PACK_UB4(file_header, LOC_CRC, crc);
    PACK_UB4(file_header, LOC_USIZE, statbuf->st_size); 
    PACK_UB4(file_header, LOC_CSIZE, statbuf->st_size);
  } else 
    memset((file_header + LOC_CRC), '\0', 12); /* clear crc/usize/csize */
  
  ze = (zipentry*)malloc(sizeof(zipentry));
  if(ze == NULL)
    exit_on_error("malloc");

  memset(ze, 0, sizeof(zipentry)); /* clear all the fields*/
  ze->filename = strdup(fname);

  ze->mod_time = (ub2)(mod_time & 0x0000ffff);
  ze->mod_date = (ub2)((mod_time & 0xffff0000) >> 16);

  if(!seekable && !do_compress)
    ze->crc = crc;

  ze->csize = statbuf->st_size;
  ze->usize = ze->csize;

  if (existing)
    ze->offset = existing->offset;
  else if (updating)
    ze->offset = end_of_entries;
  else
    ze->offset = lseek(jfd, 0, SEEK_CUR);

  if(do_compress)
    ze->compressed = TRUE;
  else
    ze->compressed = FALSE;

  if (!existing)
    add_entry(ze);
  if (updating && lseek (jfd, ze->offset, SEEK_SET) < 0)
    {
      perror ("lseek");
      return 1;
    }

  /* We can safely write the header here, since it will be the same size
     as before */
  
  /* Write the local header */
  if (-1 == write(jfd, file_header, 30))
      exit_on_error("write");

  /* write the file name to the zip file */
  if (1 == write(jfd, fname, file_name_length))
    exit_on_error("write");

  if(verbose){
    if (existing)
      printf ("updating: %s ", fname);
    else
      printf("adding: %s ", fname);
    fflush(stdout);
  }
 
  if(do_compress){
    /* compress the file */
    compress_file(ffd, jfd, ze, existing);
  } else {
    /* If we are not writing the last entry, make space for it. */
    if (existing && existing->next_entry)
      {
      if (ze->usize > existing->usize)
        {
          if (shift_down (jfd, existing->next_entry->offset,
                      ze->usize - existing->usize, existing->next_entry))
            {
            fprintf (stderr, "%s: %s\n", progname, strerror (errno));
            return 1;
            }
        }
      }

    /* Write the contents of the file (uncompressed) to the zip file */
    /* calculate the CRC as we go along */
    ze->crc = crc32(0L, Z_NULL, 0); 
      
    while((rdamt = read(ffd, rd_buff, RDSZ)) != 0){
      ze->crc = crc32(ze->crc, rd_buff, rdamt);
      if(write(jfd, rd_buff, rdamt) != rdamt){
        perror("write");
        return 0;
      }
    }
  }
  close(ffd);
  
  /* write out data descriptor */
  PACK_UB4(data_descriptor, 4, ze->crc);
  PACK_UB4(data_descriptor, 8, ze->csize);
  PACK_UB4(data_descriptor, 12, ze->usize);

  /* we need to seek back and fill the header */
  if(seekable){
    offset = (ze->csize + strlen(ze->filename) + 16);
    
    if(lseek(jfd, -offset, SEEK_CUR) == (off_t)-1)
      exit_on_error("lseek");

    if(write(jfd, (data_descriptor + 4), 12) != 12){
      perror("write");
      return 0;
    }
    
    offset -= 12;

    if(lseek(jfd, offset, SEEK_CUR) == (off_t)-1)
      exit_on_error("lseek");

  } else if(do_compress){
    /* Sun's jar tool will only allow a data descriptor if the entry is
       compressed, but we'll save 16 bytes/entry if we only use it when
       we can't seek back on the file */
    /* Technically, you CAN'T have a data descriptor unless the data
       part has an obvious end, which DEFLATED does. Otherwise, there
       would not be any way to determine where the data descriptor is.
       Store an uncompressed file that ends with 0x504b0708, and see.
       -- csm */
    
    if(write(jfd, data_descriptor, 16) != 16){
      perror("write");
      return 0;
    }
  }

  if (existing)
    {
      int dd = (existing->flags & (1 << 3)) ? 12 : 0;
      if (existing->next_entry && ze->csize < existing->csize + dd)
      {
        if (shift_up (jfd, existing->next_entry->offset,
                  existing->csize + dd - ze->csize,
                  existing->next_entry))
          {
            perror (progname);
            return 1;
          }
      }
      /* Replace the existing entry data with this entry's. */
      existing->csize = ze->csize;
      existing->usize = ze->usize;
      existing->crc = ze->crc;
      existing->mod_time = ze->mod_time;
      existing->mod_date = ze->mod_date;
      free (ze->filename);
      free (ze);
    }
  else if (updating)
    end_of_entries = lseek (jfd, 0, SEEK_CUR);
  
  if(verbose)
    printf("(in=%d) (out=%d) (%s %d%%)\n", 
           (int)ze->usize, (int)ze->csize,
           (do_compress ? "deflated" : "stored"),
           (do_compress ? ((int)((1 - ze->csize/(float)ze->usize) * 100)) : 0));

  return 0;
}

int create_central_header(int fd){
  ub1 header[46];
  ub1 end_header[22];
  int start_offset;
  int dir_size;
  int total_in = 0, total_out = 22;

  zipentry *ze;

  /* magic number */
  header[0] = 'P';
  header[1] = 'K';
  header[2] = 1;
  header[3] = 2;
  /* version made by */
  header[4] = 10;
  header[5] = 0;
  /* version needed to extract */
  header[6] = 10;
  header[7] = 0;
  /* bit flag */
  header[8] = 0;
  header[9] = 0;
  /* compression method */
  header[10] = 0;
  header[11] = 0;
  /* file mod time */
  header[12] = 0;
  header[13] = 0;
  /* file mod date */
  header[14] = 0;
  header[15] = 0;
  /* crc 32 */
  header[16] = 0;
  header[17] = 0;
  header[18] = 0;
  header[19] = 0;
  /* compressed size */
  header[20] = 0;
  header[21] = 0;
  header[22] = 0;
  header[23] = 0;
  /* uncompressed size */
  header[24] = 0;
  header[25] = 0;
  header[26] = 0;
  header[27] = 0;
  /* filename length */
  header[28] = 0;
  header[29] = 0;
  /* extra field length */
  header[30] = 0;
  header[31] = 0;
  /* file comment length */
  header[32] = 0;
  header[33] = 0;
  /* disk number start */
  header[34] = 0;
  header[35] = 0;
  /* internal file attribs */
  header[36] = 0;
  header[37] = 0;
  /* external file attribs */
  header[38] = 0;
  header[39] = 0;
  header[40] = 0;
  header[41] = 0;
  /* relative offset of local header */
  header[42] = 0;
  header[43] = 0;
  header[44] = 0;
  header[45] = 0;

  start_offset = lseek(fd, 0, SEEK_CUR);

  for(ze = ziptail; ze != NULL; ze = ze->next_entry){

    total_in += ze->usize;
    total_out += ze->csize + 76 + strlen(ze->filename) * 2;

    if(ze->compressed){
      PACK_UB2(header, CEN_COMP, 8);
    } else {
      PACK_UB2(header, CEN_COMP, 0);
    }
        
    PACK_UB2(header, CEN_MODTIME, ze->mod_time);
    PACK_UB2(header, CEN_MODDATE, ze->mod_date);
    PACK_UB4(header, CEN_CRC, ze->crc);
    PACK_UB4(header, CEN_CSIZE, ze->csize);
    PACK_UB4(header, CEN_USIZE, ze->usize);
    PACK_UB2(header, CEN_FNLEN, strlen(ze->filename));
    PACK_UB4(header, CEN_OFFSET, ze->offset);

    if (-1 == write(fd, header, 46))
      exit_on_error("write");

    if (-1 == write(fd, ze->filename, strlen(ze->filename)))
      exit_on_error("write");
  }

  dir_size = lseek(fd, 0, SEEK_CUR) - start_offset;

  /* magic number */
  end_header[0] = 0x50;
  end_header[1] = 0x4b;
  end_header[2] = 0x05;
  end_header[3] = 0x06;
  /* number of this disk */
  end_header[4] = 0;
  end_header[5] = 0;
  /* number of disk w/ start of central header */
  end_header[6] = 0;
  end_header[7] = 0;
  /* total number of entries in central dir on this disk*/
  PACK_UB2(end_header, 8, number_of_entries);
  /* total number of entries in central dir*/
  PACK_UB2(end_header, 10, number_of_entries);
  /* size of central dir. */
  PACK_UB4(end_header, 12, dir_size);
  /* offset of start of central dir */
  PACK_UB4(end_header, 16, start_offset);
  /* zipfile comment length */
  end_header[20] = 0;
  end_header[21] = 0;

  if (-1 == write(fd, end_header, 22))
    exit_on_error("write");

  if(verbose)
    printf("Total:\n------\n(in = %d) (out = %d) (%s %d%%)\n", 
           total_in, 
           total_out,
           (do_compress ? "deflated" : "stored"),
           (int)((1 - (total_out / (float)total_in)) * 100)
           );

  return 0;
}

int extract_jar(int fd, const char **files, int file_num){
  size_t rdamt;
  int out_a, in_a;
  uint32_t signature;
  ub4 csize;
  ub4 crc;
  ub2 fnlen;
  ub2 eflen;
  ub2 flags;
  ub2 method;
  ub1 *filename = NULL;
  ub2 filename_len = 0;
  ub4 rd_buff[RDSZ];
  pb_file pbf;
  ub1 scratch[16];
  zipentry ze;
  int f_fd;
  int dir;
  int handle;
  int j;

  /*  Let's be able to hold 10 subdirs, initially. */
  int subdir_list_size = 10;
  /* If any file is contained within a directory in this list, 
   * then it should be extracted. A file is considered to be contained
   * in a directory if the directory is a substring of the file path. */
  char **subdir_list = malloc(subdir_list_size * sizeof(char *));
  /* Next available index to use. */
  int subdir_list_index = 0;

  init_inflation();
  pb_init(&pbf, fd);

  for(;;){
    f_fd = 0;
    crc = 0;
    ze.crc = 0;
    
    dir = FALSE; /* by default, the file isn't a dir */
    handle = TRUE; /* by default we'll extract/create the file */

    if((rdamt = pb_read(&pbf, scratch, 4)) != 4){
      perror("read");
      break;
    }
    
    signature = UNPACK_UB4(scratch, 0);

#ifdef DEBUG    
    printf("signature is %x\n", signature);
#endif
    if(signature == 0x08074b50){
#ifdef DEBUG    
      printf("skipping data descriptor\n");
#endif
      consume(&pbf, 12);
      continue;
    } else if(signature == 0x02014b50){
#ifdef DEBUG    
      printf("Central header reached.. we're all done!\n");
#endif
      break;
    }else if(signature != 0x04034b50){
      printf("Ick! %#" PRIx32 "\n", signature);
      break;
    }
    
    if((rdamt = pb_read(&pbf, (file_header + 4), 26)) != 26){
      perror("read");
      break;
    }
    
    csize = UNPACK_UB4(file_header, LOC_CSIZE);
#ifdef DEBUG    
    printf("Compressed size is %u\n", csize);
#endif

    fnlen = UNPACK_UB2(file_header, LOC_FNLEN);
#ifdef DEBUG    
    printf("Filename length is %hu\n", fnlen);
#endif

    eflen = UNPACK_UB2(file_header, LOC_EFLEN);
#ifdef DEBUG    
    printf("Extra field length is %hu\n", eflen);
#endif

    flags = UNPACK_UB2(file_header, LOC_EXTRA);
#ifdef DEBUG    
    printf("Flags are %#hx\n", flags);
#endif

    method = UNPACK_UB2(file_header, LOC_COMP);
#ifdef DEBUG
    printf("Compression method is %#hx\n", method);
#endif

    /* if there isn't a data descriptor */
    if(!(flags & 0x0008)){
      crc = UNPACK_UB4(file_header, LOC_CRC);
#ifdef DEBUG    
      printf("CRC is %x\n", crc);
#endif
    }

    if(filename_len < fnlen + 1){
      if(filename != NULL)
        free(filename);
      
      filename = malloc(sizeof(ub1) * (fnlen + 1));
      filename_len = fnlen + 1;
    }

    pb_read(&pbf, filename, fnlen);
    filename[fnlen] = '\0';

#ifdef DEBUG    
    printf("filename is %s\n", filename);
#endif
    /* If we have any subdirs that we're processing, then we must check */
    if(file_num > 0 || subdir_list_index > 0){
      handle = FALSE;
      
      for(j = 0; j < subdir_list_index; j++) {
#ifdef DEBUG
        printf("extract_jar: %s substring of %s ? (subdir_list check)", subdir_list[j], filename);
#endif
        char * index = strstr((const char *)filename,(const char *)subdir_list[j]);
        /* If the subdir is found as a substring at the beginning 
         * of the current filename, then handle this filename. */
        if(index != NULL && (((const char *)filename - index) == 0)) {
#ifdef DEBUG
          printf(" ... yes\n");
#endif
          handle = TRUE;
          break;
        } else {
#ifdef DEBUG
          printf("... no, index=%d, filename=%d\n", index, filename);
#endif
        }
      }

      if (handle == FALSE) {
        for(j = 0; j < file_num; j++) {
#ifdef DEBUG
          printf("extract_jar: %s same as %s ? ",files[j],filename);
#endif
          if(strcmp(files[j], (const char *)filename) == 0){
#ifdef DEBUG
            printf(" ... yes\n");
#endif
            handle = TRUE;
            break;
          } else {
#ifdef DEBUG
            printf(" ... no\n");
#endif
          }

          /* Test to see if files[j] is a directory, too */
          /* + 1 for extra '/' character */
          int test_dir_len = strlen(files[j]) + 1;
          char * test_dir = malloc(test_dir_len + 1 * sizeof(char));
          strcpy(test_dir, files[j]);
          test_dir[test_dir_len - 1] = '/';
          test_dir[test_dir_len] = '\0';

          char * index = strstr((const char *) filename, (const char *) test_dir);
#ifdef DEBUG
          printf("extract_jar: %s substring of %s ? ", test_dir, filename);
#endif
          /* If test_dir is indeed a directory, then add it to subdir_list, so 
           * that we may extract any other files within this directory. */
          if (index != NULL && (((const char *)filename - index) == 0)) {
#ifdef DEBUG
            printf(" ... yes\n");
#endif
            /* Add 10 more spots to subdir_list */
            if (subdir_list_index == subdir_list_size) {
              subdir_list_size = subdir_list_size + 10;
              subdir_list = realloc(subdir_list, (subdir_list_size) * sizeof(char *));

              if (subdir_list == NULL) {
                fprintf(stderr, "error realloc-ing subdir_list_size\n");
                exit(EXIT_FAILURE);
              }
            }

            subdir_list[subdir_list_index] = malloc((test_dir_len + 1)*sizeof(char));
            strcpy(subdir_list[subdir_list_index], test_dir);
            handle = TRUE;
            subdir_list_index++;
            break;
          } else {
#ifdef DEBUG
            printf(" ... no \n");
#endif
          }

          free(test_dir);
        }
      }
    }

    if(!handle)
      f_fd = -1;

    /* OK, there is some directory information in the file.  Nothing to do
       but ensure the directory(s) exist, and create them if they don't.
       What a pain! */
    if(strchr((const char *)filename, '/') != NULL && handle){
      /* Loop through all the directories in the path, (everything w/ a '/') */
      const ub1 *start = filename;
      char *tmp_buff;
      struct stat sbuf;
      int depth = 0;

      tmp_buff = malloc(sizeof(char) * strlen((const char *)filename));

      for(;;){
        const ub1 *idx = (const unsigned char *)strchr((const char *)start, '/');

        if(idx == NULL)
          break;
        else if(idx == start){
          start++;
          continue;
        }
        start = idx + 1;

        strncpy(tmp_buff, (const char *)filename, (idx - filename));
        tmp_buff[(idx - filename)] = '\0';

#ifdef DEBUG    
        printf("checking the existance of %s\n", tmp_buff);
#endif
      if(strcmp(tmp_buff, "..") == 0){
        --depth;
        if (depth < 0){
          fprintf(stderr, "Traversal to parent directories during unpacking!\n");
          exit(EXIT_FAILURE);
        }
      } else if (strcmp(tmp_buff, ".") != 0)
        ++depth;
        if(stat(tmp_buff, &sbuf) < 0){
          if(errno != ENOENT)
            exit_on_error("stat");

        } else if(S_ISDIR(sbuf.st_mode)){
#ifdef DEBUG    
          printf("Directory exists\n");
#endif
          continue;
        }else {
          fprintf(stderr, "Hmmm.. %s exists but isn't a directory!\n",
                  tmp_buff);
          exit(EXIT_FAILURE);
        }
        
#ifdef DEBUG    
        printf("Making directory..\n");
#endif
        if(mkdir(tmp_buff, 0755) < 0)
          exit_on_error("mkdir");

        if(verbose && handle)
          printf("%10s: %s/\n", "created", tmp_buff);

      }

      /* only a directory */
      if(strlen((const char *)start) == 0)
        dir = TRUE;

#ifdef DEBUG    
      printf("Leftovers are \"%s\" (%d)\n", start, strlen((const char *)start));
#endif

      /* If the entry was just a directory, don't write to file, etc */
      if(strlen((const char *)start) == 0)
        f_fd = -1;

      free(tmp_buff);
    }

    if(f_fd != -1 && handle){
      f_fd = open((const char *)filename,
                  O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, 0644);

      if(f_fd < 0){
        fprintf(stderr, "Error extracting JAR archive!\n");
        exit_on_error((const char *)filename);
      }
    }

    if(method != 8 && flags & 0x0008){
      fprintf(stderr, "Error in JAR file! (not compressed but data desc.)\n");
      exit(EXIT_FAILURE);
    }

    if (eflen > 0)
      consume(&pbf, eflen);

    if(method == 8 || flags & 0x0008){
      
      inflate_file(&pbf, f_fd, &ze);
    } else {

#ifdef DEBUG    
      printf("writing stored data.. (%d bytes)\n", csize);
#endif

      out_a = 0;
      in_a = csize;

      ze.crc = crc32(ze.crc, NULL, 0); /* initialize the crc */

      while(out_a < (int)csize){
        rdamt = (in_a > RDSZ ? RDSZ : in_a);
        if(pb_read(&pbf, rd_buff, rdamt) != rdamt)
          exit_on_error("read");
        
        ze.crc = crc32(ze.crc, (Bytef*)rd_buff, rdamt);

        if(f_fd >= 0) {
        ssize_t num_written;
          num_written = write(f_fd, rd_buff, rdamt);
        if (num_written == -1)
          exit_on_error("write");
      }

        out_a += rdamt;
        in_a -= rdamt;

#ifdef DEBUG    
        printf("%d bytes written\n", out_a);
#endif
      }
    }

    /* if there is a data descriptor left, compare the CRC */
    if(flags & 0x0008){

      if(pb_read(&pbf, scratch, 16) != 16)
        exit_on_error("read");

      signature = UNPACK_UB4(scratch, 0);

      if(signature != 0x08074b50){
        fprintf(stderr, "Error! Missing data descriptor!\n");
        exit(EXIT_FAILURE);
      }

      crc = UNPACK_UB4(scratch, 4);

    }

    if(crc != ze.crc){
      fprintf(stderr, "Error! CRCs do not match! Got %lx, expected %lx\n",
              (unsigned long) ze.crc, (unsigned long) crc);
      exit(EXIT_FAILURE);
    }

    close(f_fd);

    if(verbose && dir == FALSE && handle)
      printf("%10s: %s\n",
             (method == 8 ? "inflated" : "extracted"),
             (const char *) filename);
  }

  for (j = 0; j < subdir_list_index; j++) {
    free(subdir_list[j]);
  }
  free(subdir_list); 
  return 0;
}

static int list_jar(int fd, const char **files, int file_num){
  ub4 signature;
  ub4 csize;
  ub4 usize;
  ub4 mdate;
  ub4 tmp;
  ub2 fnlen;
  ub2 eflen;
  ub2 clen;
  ub2 flags;
  ub2 method;
  ub2 cen_size;
  ub1 *filename = NULL;
  ub1 scratch[16];
  ub1 cen_header[46];
  ub2 filename_len = 0;
  off_t size;
  off_t central_header_offset;
  ub2 i;
  int j;
  time_t tdate;
  struct tm *s_tm;
  char ascii_date[31];
  zipentry ze;

#ifdef DEBUG
  printf("Listing jar file, looking for %d files\n", file_num);
#endif

  /* This should be the start of the central-header-end section */
  if(seekable){
    if(lseek(fd, -22, SEEK_END) == (off_t)-1)
      exit_on_error("lseek");
    
    if(read(fd, &tmp, sizeof(ub4)) != 4)
      exit_on_error("read");

#ifdef WORDS_BIGENDIAN
    tmp = L2BI(tmp);
#endif

    if(tmp != 0x06054b50){
      /* Normally, we seek to the end of the file, look at the
         central-header-end section, and read the offset to the
         central header section. But if there is a zipfile comment at
         the end, the value we are looking for will not be in a fixed
         position, so we have to fall back on the method used for
         non-seekable files. */
      seekable = FALSE;
      if(lseek(fd, 0, SEEK_SET) == (off_t)-1)
        exit_on_error("lseek");
    } else {
      if(lseek(fd, 6, SEEK_CUR) == (off_t)-1)
        exit_on_error("lseek");
  
      if(read(fd, &cen_size, 2) != 2)
        exit_on_error("read");

#ifdef WORDS_BIGENDIAN
      cen_size = L2BS(cen_size);
#endif

      /*   printf("%hu entries in central header\n", cen_size); */

      if(lseek(fd, 4, SEEK_CUR) == (off_t)-1)
        exit_on_error("lseek");

      if(read(fd, &tmp, 4) != 4)
        exit_on_error("read");


#ifdef WORDS_BIGENDIAN
      tmp = L2BI(tmp);
#endif

      central_header_offset = tmp;

      /*   printf("Central header offset = %d\n", central_header_offset); */

      if(lseek(fd, central_header_offset, SEEK_SET) != central_header_offset)
        exit_on_error("lseek");

      /* Loop through the entries in the central header */
      for(i = 0; i < cen_size; i++){
        ssize_t read_amt;

        read_amt = read(fd, &cen_header, 46);
    
        if(read_amt == -1 || read_amt != 46)
          exit_on_error("read");

        signature = UNPACK_UB4(cen_header, 0);
        if(signature != 0x02014b50){
          fprintf(stderr, "Error in JAR file! Cannot locate central header!\n");
          exit(EXIT_FAILURE);
        }

        usize = UNPACK_UB4(cen_header, CEN_USIZE);
        fnlen = UNPACK_UB2(cen_header, CEN_FNLEN);
        eflen = UNPACK_UB2(cen_header, CEN_EFLEN);
        clen = UNPACK_UB2(cen_header, CEN_COMLEN);

        /* If we're providing verbose output, we need to make an ASCII
         * formatted version of the date. */
        if(verbose){
        size_t time_string_length;

          mdate = UNPACK_UB4(cen_header, CEN_MODTIME);
          tdate = dos2unixtime(mdate);
          s_tm = localtime(&tdate);
          time_string_length = strftime(ascii_date, 30, "%a %b %d %H:%M:%S %Z %Y", s_tm);
        if (0 == time_string_length)
          exit_on_error("strftime");

          ascii_date[30] = '\0';
        }

        if(filename_len < fnlen + 1){
          if(filename != NULL)
            free(filename);

          filename = malloc(sizeof(ub1) * (fnlen + 1));
          if (NULL == filename)
            exit_on_error("malloc");

          filename_len = fnlen + 1;
        }
    
        read_amt = read(fd, filename, fnlen);
        if(read_amt == -1 || read_amt != (ssize_t) fnlen)
          exit_on_error("read");

        filename[fnlen] = (ub1) '\0';
    
        /* if the user specified a list of files on the command line,
           we'll only display those, otherwise we'll display everything */
        if(file_num > 0){
          for(j = 0; j < file_num; j++)
            if(strcmp(files[j], (const char *)filename) == 0){
              if(verbose)
                printf("%6lu %s %s\n", (unsigned long) usize, ascii_date, (const char *) filename);
              else
                printf("%s\n", (const char *) filename);
              break;
            }
        } else {
          if(verbose)
            printf("%6lu %s %s\n", (unsigned long) usize, ascii_date, (const char *) filename);
          else
            printf("%s\n", (const char *) filename);
        }            
      
        size = eflen + clen;
        if(size > 0){
          if(lseek(fd, size, SEEK_CUR) == (off_t)-1)
            exit_on_error("lseek");
      }
      }
    }
  }

  if (!seekable) {
    /* the file isn't seekable (or there is a zipfile comment).. evil! */
    pb_file pbf;

    pb_init(&pbf, fd);

    init_inflation();

    for(;;){
      if(pb_read(&pbf, scratch, 4) != 4){
        perror("read");
        break;
      }
      
      signature = UNPACK_UB4(scratch, 0);
      
#ifdef DEBUG
      printf("signature is %x\n", signature);
#endif
      
      if(signature == 0x08074b50){
#ifdef DEBUG
        printf("skipping data descriptor\n");
#endif
        pb_read(&pbf, scratch, 12);
        continue;
      } else if(signature == 0x02014b50){
#ifdef DEBUG
        printf("Central header reached.. we're all done!\n");
#endif
        break;
      }else if(signature != 0x04034b50){
#ifdef DEBUG
        printf("Ick! %#x\n", signature);
#endif
        fprintf(stderr, "Error in JAR file format\n");
        exit(EXIT_FAILURE);
      }
      
      if(pb_read(&pbf, (file_header + 4), 26) != 26){
        perror("read");
        break;
      }
      
      csize = UNPACK_UB4(file_header, LOC_CSIZE);
#ifdef DEBUG
      printf("Compressed size is %u\n", csize);
#endif
      
      fnlen = UNPACK_UB2(file_header, LOC_FNLEN);
#ifdef DEBUG
      printf("Filename length is %hu\n", fnlen);
#endif
      
      eflen = UNPACK_UB2(file_header, LOC_EFLEN);
#ifdef DEBUG
      printf("Extra field length is %hu\n", eflen);
#endif
      
      method = UNPACK_UB2(file_header, LOC_COMP);
#ifdef DEBUG
      printf("Compression method is %#hx\n", method);
#endif

      flags = UNPACK_UB2(file_header, LOC_EXTRA);
#ifdef DEBUG
      printf("Flags are %#hx\n", flags);
#endif
      
      usize = UNPACK_UB4(file_header, LOC_USIZE);

      /* If we're providing verbose output, we need to make an ASCII
       * formatted version of the date. */
      if(verbose){
        mdate = UNPACK_UB4(file_header, LOC_MODTIME);
        tdate = dos2unixtime(mdate);
        s_tm = localtime(&tdate);
        strftime(ascii_date, 30, "%a %b %d %H:%M:%S %Z %Y", s_tm);
      }

      if(filename_len < fnlen + 1){
        if(filename != NULL)
          free(filename);
        
        filename = malloc(sizeof(ub1) * (fnlen + 1));
        ascii_date[30] = '\0';
        filename_len = fnlen + 1;
      }
      
      pb_read(&pbf, filename, fnlen);
      filename[fnlen] = (ub1) '\0';
      
      /* the header is at the end.  In a JAR file, this means that the data
         happens to be compressed.  We have no choice but to inflate the
         data */
      if(flags & 0x0008){

        size = eflen;

        if(size > 0)
          consume(&pbf, size);
        
        if(method == 8){
#ifdef DEBUG
          printf("inflating %s\n", filename);
#endif
          inflate_file(&pbf, -1, &ze);

          usize = ze.usize;
        } else 
          printf("We're shit outta luck!\n");
          
      } else {
        size = csize + (eflen > 0 ? eflen : 0);
        

#ifdef DEBUG
        printf("Skipping %ld bytes\n", (long)size);
#endif

        consume(&pbf, size);
      }
      /* print out the listing */
      if(file_num > 0){
        for(j = 0; j < file_num; j++)
          if(strcmp(files[j], (const char *)filename) == 0){
            if(verbose)
              printf("%6lu %s %s\n", (unsigned long) usize, ascii_date, (const char *) filename);
            else
              printf("%s\n", (const char *) filename);
            break;
          }
      } else {
        if(verbose)
          printf("%6lu %s %s\n", (unsigned long) usize, ascii_date, (const char *) filename);
        else
          printf("%s\n", (const char *) filename);
      }        
    }
  }
  return 0;
}

/**
 * Consume bytes from a pushback buffer.
 *
 * @param pbf The pushback buffer to consume from.
 * @param amt The amount of bytes to consume.
 */
static void consume(pb_file *pbf, size_t amt){
  size_t tc = 0; /* total amount consumed */
  ub1 *buff;
  size_t rdamt;

#ifdef DEBUG
  printf("Consuming %d bytes\n", amt);
#endif
  
  buff = (ub1 *) malloc(RDSZ * sizeof(ub1));
  if (NULL == buff)
    exit_on_error("malloc");

  if (seekable){
    if (amt <= pbf->buff_amt)
      tc += pb_read(pbf, buff, amt);
    else {
      off_t location;
      location = lseek(pbf->fd, amt - pbf->buff_amt, SEEK_CUR);
      if (location == -1)
        exit_on_error("lseek");

      tc += pb_read(pbf, buff, pbf->buff_amt); /* clear pbf */
    }
  } else
  while(tc < amt){
    rdamt = pb_read(pbf, buff, ((amt - tc) < RDSZ ? (amt - tc) : RDSZ));
#ifdef DEBUG
    printf("got %d bytes\n", rdamt);
#endif
    tc += rdamt;
  }

  free(buff);

#ifdef DEBUG
  printf("%d bytes consumed\n", tc);
#endif
}

void usage(const char *filename){
  fprintf(stderr, "Try `%s --help' for more information.\n", filename);
  exit(EXIT_FAILURE);
}

void version (void)
{
  printf("jar (%s) %s\n\n", PACKAGE, VERSION);
  printf("Copyright 1999, 2000, 2001  Bryan Burns\n");
  printf("Copyright 2006 Free Software Foundation\n");
  printf("\
This is free software; see the source for copying conditions.  There is NO\n\
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n");
  exit(EXIT_SUCCESS);
}

void help(const char *filename)
{
  printf("\
Usage: %s {ctxuV}[vfm0ME@] [jar-file] [manifest-file] [-C dir] files ...\n\
\n\
Store many files together in a single `jar' file.\n\
\n\
  -c              create new archive\n\
  -t              list table of contents for archive\n\
  -x              extract named (or all) files from archive\n\
  -u              update existing archive\n\
", filename);
  printf("\n\
  -@              read names from stdin\n\
  -0              store only; use no ZIP compression\n\
  -C DIR FILE     change to the specified directory and include\n\
                  the following file\n\
  -E              don't include the files found in a directory\n\
  -f FILE         specify archive file name\n\
  --help          print this help, then exit\n\
");
  printf("\
  -m FILE         include manifest information from specified manifest file\n\
  -M              Do not create a manifest file for the entries\n\
  -i              generate an index of the packages in this jar\n\
                  and its Class-Path (currently unimplemented)\n\
  -v              generate verbose output on standard output\n\
  -V, --version   display version information\n\
");
  printf("\n\
  -J*             -J options are ignored\n\
  @FILE           expand options and files from FILE\n\
");
  printf("\n\
If any file is a directory then it is processed recursively.\n\
The manifest file name and the archive file name needs to be specified\n\
in the same order the 'm' and 'f' flags are specified.\n\
\n\
Example 1: to archive two class files into an archive called classes.jar: \n\
     jar cvf classes.jar Foo.class Bar.class \n\
Example 2: use an existing manifest file 'mymanifest' and archive all the\n\
     files in the foo/ directory into 'classes.jar': \n\
     jar cvfm classes.jar mymanifest -C foo/ .\n\
");

  exit(EXIT_SUCCESS);
}

/* Convert "tar-style" first argument to a form expected by getopt.
   This idea and the code comes from GNU tar.  This can allocate a new
   argument vector.  This might leak some memory, but we don't care.  */
static void
expand_options (int *argcp, char ***argvp)
{
  int argc = *argcp;
  char **argv = *argvp;

  /* Accept arguments with a leading "-" (eg "-cvf"), but don't do expansion 
     if a long argument (like "--help") is detected. */
  if (argc > 1 && argv[1][1] != '-')
    {
      char buf[3];
      char **new_argv;
      size_t new_argc;
      size_t args_to_expand;
      char *p;
      char **in, **out;

      buf[0] = '-';
      buf[2] = '\0';

      args_to_expand = strlen (argv[1]);
      if (argv[1][0] == '-')
        --args_to_expand;
        
      new_argc = argc - 1 + args_to_expand;
      new_argv = (char **) malloc (new_argc * sizeof (char *));
      in = argv;
      out = new_argv;

      *out++ = *in++;
      p = *in++;
      if (*p == '-')
        p++;
      while (*p != '\0')
      {
        char *opt;
        buf[1] = *p;
        *out++ = strdup (buf);
        /* If the option takes an argument, move the next argument
           to just after this option.  */
        opt = strchr (OPTION_STRING, *p);
        if (opt && opt[1] == ':')
          {
            if (in < argv + argc)
            *out++ = *in++;
            else
            {
              fprintf(stderr, "%s: option `%s' requires an argument.\n",
                    argv[0], buf);
              usage(argv[0]);
            }
          }
        ++p;
      }

      /* Copy remaining options.  */
      while (in < argv + argc)
      *out++ = *in++;

      *argcp = (int) new_argc;
      *argvp = new_argv;
    }
}

/* Find the index entry of the given name */
static int
find_index_entry(const char* fname)
{
  ziplistentry *zle;
  for (zle = ziplisttail; zle; zle = zle->next_entry)
    {
      if (!strcmp (zle->filename, fname))
      return TRUE;
    }
  return FALSE;
      
}

/* Add a new index entry to the global linked list */
void add_list_entry(ziplistentry *zle)
{

  if(ziplisthead == NULL){
    ziplisthead = zle;
    ziplisttail = ziplisthead;
  } else {
    ziplisthead->next_entry = zle;
    ziplisthead = zle;
  }  
}

/* Add an array to the zip stream, in uncompressed form */
int add_array_to_jar(int jfd, char* content, size_t content_length, const char *fname, const int updating)
{
  size_t file_name_length;
  unsigned long mod_time;
  uLong crc = 0;
  off_t offset = 0;
  struct zipentry *ze;
  struct zipentry *existing = NULL;
  time_t current_time;
  ssize_t written = 0;

  /* Assume do_compress == FALSE */

  if (updating)
    {
      existing = find_entry (fname);
      if (existing && looks_like_dir (fname))
      {
        fprintf (stderr, "%s: %s is a directory in the archive\n",
               progname, fname);
        return 1;
      }
    }

  current_time = time(NULL);
  if(current_time == (time_t)-1)
    exit_on_error("time");

  mod_time = unix2dostime(&current_time);
  file_name_length = strlen(fname);
  
  if(!seekable)
    {
      crc = crc32(0L, Z_NULL, 0); 
      crc = crc32(crc, (const Bytef *)content, content_length);     
    }
  
  /* data descriptor */
  PACK_UB2(file_header, LOC_EXTRA, 0);
  PACK_UB2(file_header, LOC_COMP, 0);
    
  PACK_UB4(file_header, LOC_MODTIME, mod_time);
  PACK_UB2(file_header, LOC_FNLEN, file_name_length);
  
  
  if(!seekable)
    {
      PACK_UB4(file_header, LOC_CRC, crc);
      PACK_UB4(file_header, LOC_USIZE, content_length); 
      PACK_UB4(file_header, LOC_CSIZE, content_length);
    } else   
      memset((file_header + LOC_CRC), '\0', 12);  /* clear crc/usize/csize */
  
  ze = (zipentry*)malloc(sizeof(zipentry));
  if(ze == NULL)
    exit_on_error("malloc");
  
  memset(ze, 0, sizeof(zipentry)); /* clear all the fields*/
  ze->filename = strdup(fname);

  ze->mod_time = (ub2)(mod_time & 0x0000ffff);
  ze->mod_date = (ub2)((mod_time & 0xffff0000) >> 16);

  if(!seekable)
    ze->crc = crc;

  ze->csize = content_length;
  ze->usize = ze->csize;

  if (existing)
    ze->offset = existing->offset;
  else if (updating)
    ze->offset = end_of_entries;
  else
    ze->offset = lseek(jfd, 0, SEEK_CUR);

  ze->compressed = FALSE;

  if (!existing)
    add_entry(ze);
  if (updating && lseek (jfd, ze->offset, SEEK_SET) < 0)
    {
      perror ("lseek");
      return 1;
    }

  /* We can safely write the header here, since it will be the same size
     as before */
  
  /* Write the local header */
  written = write(jfd, file_header, 30);
  if ((written == -1) || ((size_t) written != 30))
    exit_on_error("write");

  /* write the file name to the zip file */
  written = write(jfd, fname, file_name_length);
  if ((written == -1) || ((size_t) written != file_name_length))
    exit_on_error("write");

  if(verbose){
    if (existing)
      printf ("updating: %s ", fname);
    else
      printf("adding: %s ", fname);
    fflush(stdout);
  }
 
      
  /* If we are not writing the last entry, make space for it. */
  if (existing && existing->next_entry)
    {
      if (ze->usize > existing->usize)
      {
        if (shift_down (jfd, existing->next_entry->offset,
                    ze->usize - existing->usize, existing->next_entry))
          {
            fprintf (stderr, "%s: %s\n", progname, strerror (errno));
            return 1;
          }
      }
    }

  /* Write the contents of the file (uncompressed) to the zip file */
  /* calculate the CRC as we go along */
  ze->crc = crc32(0L, Z_NULL, 0); 
      
  ze->crc = crc32(ze->crc, (unsigned char*)content, content_length);
  written = write(jfd, content, content_length);
  if ((written == -1) || ((size_t) written != content_length))
    exit_on_error("write");
      
  /* write out data descriptor */
  PACK_UB4(data_descriptor, 4, ze->crc);
  PACK_UB4(data_descriptor, 8, ze->csize);
  PACK_UB4(data_descriptor, 12, ze->usize);

  /* we need to seek back and fill the header */
  if(seekable){
    offset = (ze->csize + strlen(ze->filename) + 16);
    
    if(lseek(jfd, -offset, SEEK_CUR) == (off_t)-1)
      exit_on_error("lseek");

    if(write(jfd, (data_descriptor + 4), 12) != 12){
      perror("write");
      return 0;
    }
    
    offset -= 12;

    if(lseek(jfd, offset, SEEK_CUR) == (off_t)-1)
      exit_on_error("lseek");
  } 
  
  if (existing)
    {
      int dd = (existing->flags & (1 << 3)) ? 12 : 0;
      if (existing->next_entry && ze->csize < existing->csize + dd)
      {
        if (shift_up (jfd, existing->next_entry->offset,
                  existing->csize + dd - ze->csize,
                  existing->next_entry))
          {
            perror (progname);
            return 1;
          }
      }
      /* Replace the existing entry data with this entry's. */
      existing->csize = ze->csize;
      existing->usize = ze->usize;
      existing->crc = ze->crc;
      existing->mod_time = ze->mod_time;
      existing->mod_date = ze->mod_date;
      free (ze->filename);
      free (ze);
    }
  else if (updating)
    end_of_entries = lseek (jfd, 0, SEEK_CUR);
  
  if(verbose)
    printf("(in=%d) (out=%d) (%s %d%%)\n", 
           (int)ze->usize, (int)ze->csize,
           (do_compress ? "deflated" : "stored"),
           (do_compress ? ((int)((1 - ze->csize/(float)ze->usize) * 100)) : 0));

  return 0;
}

/* Convert the filename into an INDEX.LIST entry, i.e. 
   a directory when the file is not at the root, else
   the file when it's at the root. */
char* get_index_entry(char* fname)
{
  if (strrchr(fname, '/'))
    {
      char * result = strdup(fname);
      if (!result)
        exit_on_error("strdup");

      *strrchr(result, '/') = '\0';
      return result;
    }
  return fname;
}

/* Create or update an INDEX.LIST entry in the zip stream. */
int build_index(int jfd)
{
  struct zipentry * ze;
  char * index_content;
  size_t index_content_size;
  char * short_jar_fname;
  struct ziplistentry * zle;

  if (strrchr(jarfile, '/'))
    short_jar_fname = strrchr(jarfile, '/') + 1;
  else
    short_jar_fname = jarfile;

  index_content_size = strlen("JarIndex-Version: 1.0\n\n\n") + strlen(short_jar_fname) + 1;
  index_content = malloc(index_content_size);
  snprintf(index_content, index_content_size, "JarIndex-Version: 1.0\n\n%s\n", short_jar_fname);
      
  for (ze = ziptail; ze; ze = ze->next_entry)
    {
      char * index_entry = get_index_entry(ze->filename);
      if (find_index_entry(index_entry))
      continue;
      /* Do not index the META-INF/ directory */
      else if (strstr(ze->filename, "META-INF/") == ze->filename)
        continue;

      zle = (ziplistentry*) malloc(sizeof(ziplistentry));
      zle->filename = strdup(index_entry);
      zle->next_entry = NULL;
      add_list_entry(zle);
            
      index_content_size += strlen(index_entry) + 1;
      index_content = realloc(index_content, index_content_size);
      strcat(index_content, index_entry);
      strcat(index_content, "\n");
    }

  /* Replace the last byte of the index_content string, '\0', with '\n', 
     in order to avoid having binary garbage at end of the index file. */
  index_content[index_content_size - 1] = '\n';

  add_array_to_jar(jfd, index_content, index_content_size, "META-INF/INDEX.LIST", TRUE);
    
  return 0;
}

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