os2.c

压缩解压,是unzip540的升级,这个外国网站摘来的源码,是evb编写.

  free(dirp);
}


struct direct *readdir(__GPRO__ DIR * dirp)
{
  /* moved to os2data.h so it can be global */
  /* static struct direct dp; */

  if (dirp -> dd_cp == NULL)
    return NULL;

  G.os2.dp.d_namlen = G.os2.dp.d_reclen =
    strlen(strcpy(G.os2.dp.d_name, dirp -> dd_cp -> _d_entry));

  G.os2.dp.d_ino = 0;

  G.os2.dp.d_size = dirp -> dd_cp -> _d_size;
  G.os2.dp.d_mode = dirp -> dd_cp -> _d_mode;
  G.os2.dp.d_time = dirp -> dd_cp -> _d_time;
  G.os2.dp.d_date = dirp -> dd_cp -> _d_date;

  dirp -> dd_cp = dirp -> dd_cp -> _d_next;
  dirp -> dd_loc++;

  return &G.os2.dp;
}



#if 0  /* not used in unzip; retained for possibly future use */

void seekdir(DIR * dirp, long off)
{
  long i = off;
  struct _dircontents *dp;

  if (off >= 0)
  {
    for (dp = dirp -> dd_contents; --i >= 0 && dp; dp = dp -> _d_next);

    dirp -> dd_loc = off - (i + 1);
    dirp -> dd_cp = dp;
  }
}


long telldir(DIR * dirp)
{
  return dirp -> dd_loc;
}

#endif /* 0 */



static void free_dircontents(struct _dircontents * dp)
{
  struct _dircontents *odp;

  while (dp)
  {
    if (dp -> _d_entry)
      free(dp -> _d_entry);

    dp = (odp = dp) -> _d_next;
    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((uch)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
    ZCONST char *wildspec;  /* only used first time on a given dir */
{
  /* moved to os2data.h so they can be global */
#if 0
  static DIR *wild_dir = NULL;
  static ZCONST char *wildname;
  static char *dirname, matchname[FILNAMSIZ];
  static int notfirstcall=FALSE, 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.notfirstcall) {  /* first call:  must initialize everything */
        G.os2.notfirstcall = TRUE;

        if (!iswild(wildspec)) {
            strncpy(G.os2.matchname, wildspec, FILNAMSIZ);
            G.os2.matchname[FILNAMSIZ-1] = '\0';
            G.os2.have_dirname = FALSE;
            G.os2.wild_dir = NULL;
            return G.os2.matchname;
        }

        /* break the wildspec into a directory part and a wildcard filename */
        if ((G.os2.wildname = (ZCONST char *)strrchr(wildspec, '/')) == NULL &&
            (G.os2.wildname = (ZCONST char *)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)));
                strncpy(G.os2.matchname, wildspec, FILNAMSIZ);
                G.os2.matchname[FILNAMSIZ-1] = '\0';
                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",
          FnFilter1(G.os2.dirname)));

        if ((G.os2.wild_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.wild_dir)) != NULL) {
                Trace((stderr, "do_wild:  readdir returns %s\n",
                  FnFilter1(file->d_name)));
                strcpy(fnamestart, file->d_name);
                if (strrchr(fnamestart, '.') == (char *)NULL)
                    strcat(fnamestart, ".");
                if (match(fnamestart, G.os2.wildname, 1 WISEP) &&
                                                      /* 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.wild_dir);
            G.os2.wild_dir = NULL;
        }
#ifdef DEBUG
        else {
            Trace((stderr, "do_wild:  opendir(%s) returns NULL\n",
              FnFilter1(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) */
        strncpy(G.os2.matchname, wildspec, FILNAMSIZ);
        G.os2.matchname[FILNAMSIZ-1] = '\0';
        return G.os2.matchname;
    }

    /* last time through, might have failed opendir but returned raw wildspec */
    if (G.os2.wild_dir == NULL) {
        G.os2.notfirstcall = FALSE;  /* nothing left to try--reset */
        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.wild_dir)) != NULL) {
        Trace((stderr, "do_wild:  readdir returns %s\n",
          FnFilter1(file->d_name)));
        strcpy(fnamestart, file->d_name);
        if (strrchr(fnamestart, '.') == (char *)NULL)
            strcat(fnamestart, ".");
        if (match(fnamestart, G.os2.wildname, 1 WISEP)) { /* 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.wild_dir);   /* have read at least one entry; nothing left */
    G.os2.wild_dir = NULL;
    G.os2.notfirstcall = FALSE; /* 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&
 */
int mapname(__G__ renamed)
    __GDEF
    int renamed;
/*