vms.c

完整的解压zip文件的源码。包含密码功能

            sprintf(buf, "[ Cannot create output file %s ]\n", G.filename);
            vms_msg(__G__ buf, ierr);
            vms_msg(__G__ "", outfab->fab$l_stv);
            free_up();
            return PK_WARN;
        }

        if (outfab->fab$b_org & (FAB$C_REL | FAB$C_IDX)) {
            /* relative and indexed files require explicit allocation */
            ierr = sys$extend(outfab);
            if (ERR(ierr))
            {
                char buf[256];

                sprintf(buf, "[ Cannot allocate space for %s ]\n", G.filename);
                vms_msg(__G__ buf, ierr);
                vms_msg(__G__ "", outfab->fab$l_stv);
                free_up();
                return PK_WARN;
            }
        }

        outrab = &rab;
        rab.rab$l_fab = outfab;
        {
            rab.rab$l_rop |= (RAB$M_BIO | RAB$M_ASY);
        }
        rab.rab$b_rac = RAB$C_SEQ;

        if ((ierr = sys$connect(outrab)) != RMS$_NORMAL)
        {
#ifdef DEBUG
            vms_msg(__G__ "create_rms_output: sys$connect failed.\n", ierr);
            vms_msg(__G__ "", outfab->fab$l_stv);
#endif
            Info(slide, 1, ((char *)slide,
                 "Can't create output file:  %s\n", G.filename));
            free_up();
            return PK_WARN;
        }
    }                   /* end if (!uO.cflag) */

    init_buf_ring();

    if ( text_output )
        switch(rfm)
        {
            case FAB$C_VAR:
                _flush_routine = _flush_varlen;
                break;
            case FAB$C_STM:
            case FAB$C_STMCR:
            case FAB$C_STMLF:
                _flush_routine = _flush_stream;
                got_eol = 0;
                break;
            default:
                _flush_routine = _flush_blocks;
                break;
        }
    else
        _flush_routine = _flush_blocks;
    _close_routine = _close_rms;
    return PK_COOL;
}



static  int pka_devchn;
static  int pka_io_pending;
static  unsigned pka_vbn;

#if defined(__DECC) || defined(__DECCXX)
#pragma __member_alignment __save
#pragma __nomember_alignment
#endif /* __DECC || __DECCXX */
static struct
{
    short   status;
    long    count;
    short   dummy;
} pka_io_sb;
#if defined(__DECC) || defined(__DECCXX)
#pragma __member_alignment __restore
#endif /* __DECC || __DECCXX */

static struct
{
    short   status;
    short   dummy;
    void    *addr;
} pka_acp_sb;

static struct fibdef    pka_fib;
static struct atrdef    pka_atr[VMS_MAX_ATRCNT];
static int              pka_idx;
static ulg              pka_uchar;
static struct fatdef    pka_rattr;

static struct dsc$descriptor    pka_fibdsc =
{   sizeof(pka_fib), DSC$K_DTYPE_Z, DSC$K_CLASS_S, (void *) &pka_fib  };

static struct dsc$descriptor_s  pka_devdsc =
{   0, DSC$K_DTYPE_T, DSC$K_CLASS_S, &nam.nam$t_dvi[1]  };

static struct dsc$descriptor_s  pka_fnam =
{   0, DSC$K_DTYPE_T, DSC$K_CLASS_S, NULL  };

static char exp_nam[NAM$C_MAXRSS];
static char res_nam[NAM$C_MAXRSS];

#define PK_PRINTABLE_RECTYP(x)   ( (x) == FAT$C_VARIABLE \
                                || (x) == FAT$C_STREAMLF \
                                || (x) == FAT$C_STREAMCR \
                                || (x) == FAT$C_STREAM   )


static int create_qio_output(__GPRO)            /* return 1 (PK_WARN) if fail */
{
    int status;
    int i;

    if ( uO.cflag )
    {
        int rtype = pka_rattr.fat$v_rtype;
        if (!PK_PRINTABLE_RECTYP(rtype))
        {
            Info(slide, 1, ((char *)slide,
               "[ File %s has illegal record format to put to screen ]\n",
               G.filename));
            return PK_WARN;
        }

        init_buf_ring();

        switch(rtype)
        {
            case FAT$C_VARIABLE:
                _flush_routine = _flush_varlen;
                break;
            case FAT$C_STREAM:
            case FAT$C_STREAMCR:
            case FAT$C_STREAMLF:
                _flush_routine = _flush_stream;
                got_eol = 0;
                break;
            default:
                _flush_routine = _flush_blocks;
                break;
        }
        _close_routine = _close_rms;
    }
    else                        /* !(uO.cflag) : redirect output */
    {

        fileblk = cc$rms_fab;
        fileblk.fab$l_fna = G.filename;
        fileblk.fab$b_fns = strlen(G.filename);

        nam = cc$rms_nam;
        fileblk.fab$l_nam = &nam;
        nam.nam$l_esa = exp_nam;
        nam.nam$b_ess = sizeof(exp_nam);
        nam.nam$l_rsa = res_nam;
        nam.nam$b_rss = sizeof(res_nam);

        if ( ERR(status = sys$parse(&fileblk)) )
        {
            vms_msg(__G__ "create_qio_output: sys$parse failed.\n", status);
            return PK_WARN;
        }

        pka_devdsc.dsc$w_length = (unsigned short)nam.nam$t_dvi[0];

        if ( ERR(status = sys$assign(&pka_devdsc,&pka_devchn,0,0)) )
        {
            vms_msg(__G__ "create_qio_output: sys$assign failed.\n", status);
            return PK_WARN;
        }

        pka_fnam.dsc$a_pointer = nam.nam$l_name;
        pka_fnam.dsc$w_length  = nam.nam$b_name + nam.nam$b_type;
        if ( uO.V_flag /* keep versions */ )
            pka_fnam.dsc$w_length += nam.nam$b_ver;

        for (i=0;i<3;i++)
        {
            pka_fib.FIB$W_DID[i]=nam.nam$w_did[i];
            pka_fib.FIB$W_FID[i]=0;
        }

        pka_fib.FIB$L_ACCTL = FIB$M_WRITE;
        /* Allocate space for the file */
        pka_fib.FIB$W_EXCTL = FIB$M_EXTEND;
        if ( pka_uchar & FCH$M_CONTIG )
            pka_fib.FIB$W_EXCTL |= FIB$M_ALCON | FIB$M_FILCON;
        if ( pka_uchar & FCH$M_CONTIGB )
            pka_fib.FIB$W_EXCTL |= FIB$M_ALCONB;

#define SWAPW(x)        ( (((x)>>16)&0xFFFF) + ((x)<<16) )

        pka_fib.fib$l_exsz = SWAPW(pka_rattr.fat$l_hiblk);

        status = sys$qiow(0, pka_devchn, IO$_CREATE|IO$M_CREATE|IO$M_ACCESS,
                          &pka_acp_sb, 0, 0,
                          &pka_fibdsc, &pka_fnam, 0, 0, &pka_atr, 0);

        if ( !ERR(status) )
            status = pka_acp_sb.status;

        if ( ERR(status) )
        {
            vms_msg(__G__ "[ Create file QIO failed. ]\n", status);
            sys$dassgn(pka_devchn);
            return PK_WARN;
        }

#ifdef ASYNCH_QIO
        init_buf_ring();
        pka_io_pending = FALSE;
#else
        locptr = locbuf;
        loccnt = 0;
#endif
        pka_vbn = 1;
        _flush_routine = _flush_qio;
        _close_routine = _close_qio;
    }                   /* end if (!uO.cflag) */
    return PK_COOL;
}



static int replace(__GPRO)
{                       /*
                         *      File exists. Inquire user about further action.
                         */
    char answ[10];
    struct NAM nam;
    int ierr;

    if (query == 0)
    {
        do
        {
            Info(slide, 0x81, ((char *)slide,
                 "%s exists:  [o]verwrite, new [v]ersion or [n]o extract?\n\
  (uppercase response [O,V,N] = do same for all files): ",
                 G.filename));
            fflush(stderr);
        } while (fgets(answ, 9, stderr) == NULL && !isalpha(answ[0])
                 && tolower(answ[0]) != 'o'
                 && tolower(answ[0]) != 'v'
                 && tolower(answ[0]) != 'n');

        if (isupper(answ[0]))
            query = answ[0] = tolower(answ[0]);
    }
    else
        answ[0] = query;

    switch (answ[0])
    {
        case 'n':
            ierr = 0;
            break;
        case 'v':
            nam = cc$rms_nam;
            nam.nam$l_rsa = G.filename;
            nam.nam$b_rss = FILNAMSIZ - 1;

            outfab->fab$l_fop |= FAB$M_MXV;
            outfab->fab$l_nam = &nam;

            ierr = sys$create(outfab);
            if (!ERR(ierr))
            {
                outfab->fab$l_nam = NULL;
                G.filename[outfab->fab$b_fns = nam.nam$b_rsl] = '\0';
            }
            break;
        case 'o':
            outfab->fab$l_fop |= FAB$M_SUP;
            ierr = sys$create(outfab);
            break;
    }
    return ierr;
}



#define W(p)    (*(unsigned short*)(p))
#define L(p)    (*(unsigned long*)(p))
#define EQL_L(a,b)      ( L(a) == L(b) )
#define EQL_W(a,b)      ( W(a) == W(b) )

/****************************************************************
 * Function find_vms_attrs scans ZIP entry extra field if any   *
 * and looks for VMS attribute records. Returns 0 if either no  *
 * attributes found or no fab given.                            *
 ****************************************************************/
int find_vms_attrs(__G)
    __GDEF
{
    uch *scan = G.extra_field;
    struct  EB_header *hdr;
    int len;
    int type=VAT_NONE;

    outfab = NULL;
    xabfhc = NULL;
    xabdat = NULL;
    xabrdt = NULL;
    xabpro = NULL;
    first_xab = last_xab = NULL;

    if (scan == NULL)
        return VAT_NONE;
    len = G.lrec.extra_field_length;

#define LINK(p) {/* Link xaballs and xabkeys into chain */      \
                if ( first_xab == NULL )                \
                        first_xab = (void *) p;         \
                if ( last_xab != NULL )                 \
                        last_xab->xab$l_nxt = (void *) p;       \
                last_xab = (void *) p;                  \
                p->xab$l_nxt = NULL;                    \
        }
    /* End of macro LINK */

    while (len > 0)
    {
        hdr = (struct EB_header *) scan;
        if (EQL_W(&hdr->tag, IZ_SIGNATURE))
        {
            /*
             *  Info-ZIP style extra block decoding
             */
            struct IZ_block *blk;
            uch *block_id;

            type = VAT_IZ;

            blk = (struct IZ_block *)hdr;
            block_id = (uch *) &blk->bid;
            if (EQL_L(block_id, FABSIG))
            {
                outfab = (struct FAB *) extract_block(__G__ blk, 0,
                                                (uch *)&cc$rms_fab, FABL);
            }
            else if (EQL_L(block_id, XALLSIG))
            {
                xaball = (struct XABALL *) extract_block(__G__ blk, 0,
                                                (uch *)&cc$rms_xaball, XALLL);
                LINK(xaball);
            }
            else if (EQL_L(block_id, XKEYSIG))
            {
                xabkey = (struct XABKEY *) extract_block(__G__ blk, 0,
                                                (uch *)&cc$rms_xabkey, XKEYL);
                LINK(xabkey);
            }
            else if (EQL_L(block_id, XFHCSIG))
            {
                xabfhc = (struct XABFHC *) extract_block(__G__ blk, 0,
                                                (uch *)&cc$rms_xabfhc, XFHCL);
            }
            else if (EQL_L(block_id, XDATSIG))
            {
                xabdat = (struct XABDAT *) extract_block(__G__ blk, 0,
                                                (uch *)&cc$rms_xabdat, XDATL);
            }
            else if (EQL_L(block_id, XRDTSIG))
            {
                xabrdt = (struct XABRDT *) extract_block(__G__ blk, 0,
                                                (uch *)&cc$rms_xabrdt, XRDTL);
            }
            else if (EQL_L(block_id, XPROSIG))
            {
                xabpro = (struct XABPRO *) extract_block(__G__ blk, 0,
                                                (uch *)&cc$rms_xabpro, XPROL);
            }
            else if (EQL_L(block_id, VERSIG))
            {
#ifdef CHECK_VERSIONS
                char verbuf[80];
                int verlen = 0;
                uch *vers;
                char *m;

                get_vms_version(verbuf, sizeof(verbuf));
                vers = extract_block(__G__ blk, &verlen, 0, 0);
                if ((m = strrchr((char *) vers, '-')) != NULL)
                    *m = '\0';  /* Cut out release number */
                if (strcmp(verbuf, (char *) vers) && uO.qflag < 2)
                {
                    Info(slide, 0, ((char *)slide,
                         "[ Warning: VMS version mismatch."));

                    Info(slide, 0, ((char *)slide,
                         "   This version %s --", verbuf));
                    strncpy(verbuf, (char *) vers, verlen);
                    verbuf[verlen] = '\0';
                    Info(slide, 0, ((char *)slide,
                         " version made by %s ]\n", verbuf));
                }
                free(vers);
#endif /* CHECK_VERSIONS */
            }
            else
                Info(slide, 1, ((char *)slide,
                     "[ Warning: Unknown block signature %s ]\n",
                     block_id));
        }
        else if (hdr->tag == PK_SIGNATURE)
        {
            /*
             *  PKWARE-style extra block decoding
             */
            struct  PK_header   *blk;
            register byte   *scn;
            register int    len;

            type = VAT_PK;

            blk = (struct PK_header *)hdr;
            len = blk->size - (PK_HEADER_SIZE - EB_HEADSIZE);
            scn = (byte *)(&blk->data);
            pka_idx = 0;

            if (blk->crc32 != crc32(CRCVAL_INITIAL, scn, (extent)len))
            {
                Info(slide, 1, ((char *)slide,
                  "[Warning: CRC error, discarding PKWARE extra field]\n"));
                len = 0;
                type = VAT_NONE;
            }

            while (len > PK_FLDHDR_SIZE)
            {
                register struct  PK_field  *fld;
                int skip=0;

                fld = (struct PK_field *)scn;
                switch(fld->tag)
                {
                    case ATR$C_UCHAR:
                        pka_uchar = L(&fld->value);
                        break;
                    case ATR$C_RECATTR:
                        pka_rattr = *(struct fatdef *)(&fld->value);
                        break;
                    case ATR$C_UIC:
                    case ATR$C_ADDACLENT:
                        skip = !uO.X_flag;
                        break;
                }

                if ( !skip )
                {
                    pka_atr[pka_idx].atr$w_size = fld->size;
                    pka_atr[pka_idx].atr$w_type = fld->tag;
                    pka_atr[pka_idx].atr$l_addr = &fld->value;
                    ++pka_idx;
                }
                len -= fld->size + PK_FLDHDR_SIZE;
                scn += fld->size + PK_FLDHDR_SIZE;
            }
            pka_atr[pka_idx].atr$w_size = 0;    /* End of list */
            pka_atr[pka_idx].atr$w_type = 0;