os2.c

完整的解压zip文件的源码。包含密码功能

    free(odp);
  }
}


static char *getdirent(__GPRO__ ZCONST char *dir)
{
  int done;
  /* moved to os2data.h so it can be global */
  /* static int lower; */

  if (dir != NULL)
  {                                    /* get first entry */
    G.os2.hdir = HDIR_SYSTEM;
    G.os2.count = 1;
    done = DosFindFirst((PSZ) dir, &G.os2.hdir, attributes,
                        &G.os2.find, sizeof(G.os2.find), &G.os2.count);
    G.os2.lower = IsFileSystemFAT(__G__ dir);
  }
  else                                 /* get next entry */
    done = DosFindNext(G.os2.hdir,
                       &G.os2.find, sizeof(G.os2.find), &G.os2.count);

  if (done == 0)
  {
    if ( G.os2.lower )
      StringLower(G.os2.find.achName);
    return G.os2.find.achName;
  }
  else
  {
    DosFindClose(G.os2.hdir);
    return NULL;
  }
}



int IsFileSystemFAT(__GPRO__ ZCONST char *dir)  /* FAT / HPFS detection */
{
  /* moved to os2data.h so they can be global */
  /* static USHORT nLastDrive=(USHORT)(-1), nResult; */
  ULONG lMap;
  BYTE bData[64];
  char bName[3];
#ifdef __32BIT__
  ULONG nDrive, cbData;
  PFSQBUFFER2 pData = (PFSQBUFFER2) bData;
#else
  USHORT nDrive, cbData;
  PFSQBUFFER pData = (PFSQBUFFER) bData;
#endif

    /* We separate FAT and HPFS+other file systems here.
       at the moment I consider other systems to be similar to HPFS,
       i.e. support long file names and case sensitive */

    if ( isalpha(dir[0]) && (dir[1] == ':') )
      nDrive = toupper(dir[0]) - '@';
    else
      DosQueryCurrentDisk(&nDrive, &lMap);

    if ( nDrive == G.os2.nLastDrive )
      return G.os2.nResult;

    bName[0] = (char) (nDrive + '@');
    bName[1] = ':';
    bName[2] = 0;

    G.os2.nLastDrive = nDrive;
    cbData = sizeof(bData);

    if ( !DosQueryFSAttach(bName, 0, FSAIL_QUERYNAME, (PVOID) pData, &cbData) )
      G.os2.nResult = !strcmp((char *) (pData -> szFSDName) + pData -> cbName,
                              "FAT");
    else
      G.os2.nResult = FALSE;

    /* End of this ugly code */
    return G.os2.nResult;
} /* end function IsFileSystemFAT() */





/************************/
/*  Function do_wild()  */
/************************/

char *do_wild(__G__ wildspec)
    __GDEF
    char *wildspec;         /* only used first time on a given dir */
{
  /* moved to os2data.h so they can be global */
#if 0
  static DIR *dir = NULL;
  static char *dirname, *wildname, matchname[FILNAMSIZ];
  static int firstcall=TRUE, have_dirname, dirnamelen;
#endif
    char *fnamestart;
    struct direct *file;


    /* Even when we're just returning wildspec, we *always* do so in
     * matchname[]--calling routine is allowed to append four characters
     * to the returned string, and wildspec may be a pointer to argv[].
     */
    if (G.os2.firstcall) {        /* first call:  must initialize everything */
        G.os2.firstcall = FALSE;

        if (!iswild(wildspec)) {
            strcpy(G.os2.matchname, wildspec);
            G.os2.have_dirname = FALSE;
            G.os2.dir = NULL;
            return G.os2.matchname;
        }

        /* break the wildspec into a directory part and a wildcard filename */
        if ((G.os2.wildname = strrchr(wildspec, '/')) == NULL &&
            (G.os2.wildname = strrchr(wildspec, ':')) == NULL) {
            G.os2.dirname = ".";
            G.os2.dirnamelen = 1;
            G.os2.have_dirname = FALSE;
            G.os2.wildname = wildspec;
        } else {
            ++G.os2.wildname;     /* point at character after '/' or ':' */
            G.os2.dirnamelen = G.os2.wildname - wildspec;
            if ((G.os2.dirname = (char *)malloc(G.os2.dirnamelen+1)) == NULL) {
                Info(slide, 1, ((char *)slide,
                  LoadFarString(CantAllocateWildcard)));
                strcpy(G.os2.matchname, wildspec);
                return G.os2.matchname;   /* but maybe filespec was not a wildcard */
            }
            strncpy(G.os2.dirname, wildspec, G.os2.dirnamelen);
            G.os2.dirname[G.os2.dirnamelen] = '\0';   /* terminate for strcpy below */
            G.os2.have_dirname = TRUE;
        }
        Trace((stderr, "do_wild:  dirname = [%s]\n", G.os2.dirname));

        if ((G.os2.dir = opendir(__G__ G.os2.dirname)) != NULL) {
            if (G.os2.have_dirname) {
                strcpy(G.os2.matchname, G.os2.dirname);
                fnamestart = G.os2.matchname + G.os2.dirnamelen;
            } else
                fnamestart = G.os2.matchname;
            while ((file = readdir(__G__ G.os2.dir)) != NULL) {
                Trace((stderr, "do_wild:  readdir returns %s\n", file->d_name));
                strcpy(fnamestart, file->d_name);
                if (strrchr(fnamestart, '.') == (char *)NULL)
                    strcat(fnamestart, ".");
                if (match(fnamestart, G.os2.wildname, 1) &&  /* 1 == ignore case */
                    /* skip "." and ".." directory entries */
                    strcmp(fnamestart, ".") && strcmp(fnamestart, "..")) {
                    Trace((stderr, "do_wild:  match() succeeds\n"));
                    /* remove trailing dot */
                    fnamestart += strlen(fnamestart) - 1;
                    if (*fnamestart == '.')
                        *fnamestart = '\0';
                    return G.os2.matchname;
                }
            }
            /* if we get to here directory is exhausted, so close it */
            closedir(G.os2.dir);
            G.os2.dir = NULL;
        }
#ifdef DEBUG
        else {
            Trace((stderr, "do_wild:  opendir(%s) returns NULL\n", G.os2.dirname));
        }
#endif /* DEBUG */

        /* return the raw wildspec in case that works (e.g., directory not
         * searchable, but filespec was not wild and file is readable) */
        strcpy(G.os2.matchname, wildspec);
        return G.os2.matchname;
    }

    /* last time through, might have failed opendir but returned raw wildspec */
    if (G.os2.dir == NULL) {
        G.os2.firstcall = TRUE;  /* nothing left to try--reset for new wildspec */
        if (G.os2.have_dirname)
            free(G.os2.dirname);
        return (char *)NULL;
    }

    /* If we've gotten this far, we've read and matched at least one entry
     * successfully (in a previous call), so dirname has been copied into
     * matchname already.
     */
    if (G.os2.have_dirname) {
        /* strcpy(G.os2.matchname, G.os2.dirname); */
        fnamestart = G.os2.matchname + G.os2.dirnamelen;
    } else
        fnamestart = G.os2.matchname;
    while ((file = readdir(__G__ G.os2.dir)) != NULL) {
        Trace((stderr, "do_wild:  readdir returns %s\n", file->d_name));
        strcpy(fnamestart, file->d_name);
        if (strrchr(fnamestart, '.') == (char *)NULL)
            strcat(fnamestart, ".");
        if (match(fnamestart, G.os2.wildname, 1)) {     /* 1 == ignore case */
            Trace((stderr, "do_wild:  match() succeeds\n"));
            /* remove trailing dot */
            fnamestart += strlen(fnamestart) - 1;
            if (*fnamestart == '.')
                *fnamestart = '\0';
            return G.os2.matchname;
        }
    }

    closedir(G.os2.dir);     /* have read at least one dir entry; nothing left */
    G.os2.dir = NULL;
    G.os2.firstcall = TRUE;  /* reset for new wildspec */
    if (G.os2.have_dirname)
        free(G.os2.dirname);
    return (char *)NULL;

} /* end function do_wild() */

#endif /* !SFX */


/* scan extra fields for something we happen to know */

static int EvalExtraFields(__GPRO__ const char *path,
                           void *extra_field, unsigned ef_len)
{
  char *ef_ptr = extra_field;
  PEFHEADER pEFblock;
  int rc = PK_OK;

  while (ef_len >= sizeof(EFHEADER))
  {
    pEFblock = (PEFHEADER) ef_ptr;

    if (pEFblock -> nSize > (ef_len - EB_HEADSIZE))
      return PK_ERR;            /* claimed EFblock length exceeds EF size! */

    switch (pEFblock -> nID)
    {
    case EF_OS2:
      rc = SetEAs(__G__ path, ef_ptr);
      break;
    case EF_ACL:
      rc = (uO.X_flag) ? SetACL(__G__ path, ef_ptr) : PK_OK;
      break;
#if 0
    case EF_IZUNIX:
    case EF_PKUNIX:
      /* handled elsewhere */
      break;
#endif
    default:
      TTrace((stderr,"EvalExtraFields: unknown extra field block, ID=%d\n",
              pEFblock -> nID));
      break;
    }

    ef_ptr += (pEFblock -> nSize + EB_HEADSIZE);
    ef_len -= (pEFblock -> nSize + EB_HEADSIZE);

    if (rc != PK_OK)
      break;
  }

  return rc;
}



/************************/
/*  Function mapattr()  */
/************************/

int mapattr(__G)
    __GDEF
{
    /* set archive bit (file is not backed up): */
    G.pInfo->file_attr = (unsigned)(G.crec.external_file_attributes | 32) & 0xff;
    return 0;
}





/************************/
/*  Function mapname()  */
/************************/

/*
 * There are presently two possibilities in OS/2:  the output filesystem is
 * FAT, or it is HPFS.  If the former, we need to map to FAT, obviously, but
 * we *also* must map to HPFS and store that version of the name in extended
 * attributes.  Either way, we need to map to HPFS, so the main mapname
 * routine does that.  In the case that the output file system is FAT, an
 * extra filename-mapping routine is called in checkdir().  While it should
 * be possible to determine the filesystem immediately upon entry to mapname(),
 * it is conceivable that the DOS APPEND utility could be added to OS/2 some-
 * day, allowing a FAT directory to be APPENDed to an HPFS drive/path.  There-
 * fore we simply check the filesystem at each path component.
 *
 * Note that when alternative IFSes become available/popular, everything will
 * become immensely more complicated.  For example, a Minix filesystem would
 * have limited filename lengths like FAT but no extended attributes in which
 * to store the longer versions of the names.  A BSD Unix filesystem would
 * support paths of length 1024 bytes or more, but it is not clear that FAT
 * EAs would allow such long .LONGNAME fields or that OS/2 would properly
 * restore such fields when moving files from FAT to the new filesystem.
 *
 * GRR:  some or all of the following chars should be checked in either
 *       mapname (HPFS) or map2fat (FAT), depending:  ,=^+'"[]<>|\t&
 */
                             /* return 0 if no error, 1 if caution (filename */
int mapname(__G__ renamed)   /*  truncated), 2 if warning (skip file because */
    __GDEF                   /*  dir doesn't exist), 3 if error (skip file), */
    int renamed;             /*  or 10 if out of memory (skip file) */
{                            /*  [also IZ_VOL_LABEL, IZ_CREATED_DIR] */
    char pathcomp[FILNAMSIZ];      /* path-component buffer */
    char *pp, *cp=(char *)NULL;    /* character pointers */
    char *lastsemi=(char *)NULL;   /* pointer to last semi-colon in pathcomp */
    int quote = FALSE;             /* flag:  next char is literal */
    int error = 0;
    register unsigned workch;      /* hold the character being tested */


/*---------------------------------------------------------------------------
    Initialize various pointers and counters and stuff.
  ---------------------------------------------------------------------------*/

    /* can create path as long as not just freshening, or if user told us */
    G.create_dirs = (!uO.fflag || renamed);

    G.os2.created_dir = FALSE;  /* not yet */
    G.os2.renamed_fullpath = FALSE;
    G.os2.fnlen = strlen(G.filename);

/* GRR:  for VMS, convert to internal format now or later? or never? */
    if (renamed) {
        cp = G.filename - 1;    /* point to beginning of renamed name... */
        while (*++cp)
            if (*cp == '\\')    /* convert backslashes to forward */
                *cp = '/';
        cp = G.filename;
        /* use temporary rootpath if user gave full pathname */
        if (G.filename[0] == '/') {
            G.os2.renamed_fullpath = TRUE;
            pathcomp[0] = '/';  /* copy the '/' and terminate */
            pathcomp[1] = '\0';
            ++cp;
        } else if (isalpha(G.filename[0]) && G.filename[1] == ':') {
            G.os2.renamed_fullpath = TRUE;
            pp = pathcomp;
            *pp++ = *cp++;      /* copy the "d:" (+ '/', possibly) */
            *pp++ = *cp++;
            if (*cp == '/')
                *pp++ = *cp++;  /* otherwise add "./"? */
            *pp = '\0';
        }
    }

    /* pathcomp is ignored unless renamed_fullpath is TRUE: */
    if ((error = checkdir(__G__ pathcomp, INIT)) != 0)    /* init path buffer */
        return error;           /* ...unless no mem or vol label on hard disk */

    *pathcomp = '\0';           /* initialize translation buffer */
    pp = pathcomp;              /* point to translation buffer */
    if (!renamed) {             /* cp already set if renamed */
        if (uO.jflag)           /* junking directories */
/* GRR:  watch out for VMS version... */
            cp = (char *)strrchr(G.filename, '/');
        if (cp == (char *)NULL) /* no '/' or not junking dirs */
            cp = G.filename;    /* point to internal zipfile-member pathname */
        else
            ++cp;               /* point to start of last component of path */
    }

/*---------------------------------------------------------------------------
    Begin main loop through characters in filename.
  ---------------------------------------------------------------------------*/

    while ((workch = (uch)*cp++) != 0) {

        if (quote) {              /* if character quoted, */
            *pp++ = (char)workch; /*  include it literally */
            quote = FALSE;
        } else
            switch (workch) {
            case '/':             /* can assume -j flag not given */
                *pp = '\0';
                if ((error = checkdir(__G__ pathcomp, APPEND_DIR)) > 1)
                    return error;
                pp = pathcomp;    /* reset conversion buffer for next piece */
                lastsemi = (char *)NULL; /* leave directory semi-colons alone */
                break;

            case ':':
                *pp++ = '_';      /* drive names not stored in zipfile, */
                break;            /*  so no colons allowed */