flexos.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.

/*
  Copyright (c) 1990-2005 Info-ZIP.  All rights reserved.

  See the accompanying file LICENSE, version 2000-Apr-09 or later
  (the contents of which are also included in unzip.h) for terms of use.
  If, for some reason, all these files are missing, the Info-ZIP license
  also may be found at:  ftp://ftp.info-zip.org/pub/infozip/license.html
*/
/*---------------------------------------------------------------------------

  flexos.c

  FlexOS-specific routines for use with Info-ZIP's UnZip 5.2 and later.

  Based upon the MSDOS version of this file (msdos/msdos.c)

  Contains:  do_wild()
             mapattr()
             mapname()
             map2fat()
             checkdir()
             close_outfile()
             dateformat()
             version()
             _wildarg()

  ---------------------------------------------------------------------------*/



#define UNZIP_INTERNAL
#include "unzip.h"

#include <flexif.h>

/* The following should really be a static declaration,  but the compiler
   complains (crappy compiler can't cope with a static forward declaration).
 */
extern void map2fat OF((char *pathcomp, char *last_dot));

static int created_dir;        /* used by mapname(), checkdir() */
static int renamed_fullpath;   /* ditto */

/*****************************/
/*  Strings used in flexos.c  */
/*****************************/

#ifndef SFX
  static ZCONST char Far CantAllocateWildcard[] =
    "warning:  cannot allocate wildcard buffers\n";
#endif
static ZCONST char Far WarnDirTraversSkip[] =
  "warning:  skipped \"../\" path component(s) in %s\n";
static ZCONST char Far Creating[] = "   creating: %s\n";
static ZCONST char Far ConversionFailed[] =
  "mapname:  conversion of %s failed\n";
static ZCONST char Far PathTooLong[] = "checkdir error:  path too long: %s\n";
static ZCONST char Far CantCreateDir[] = "checkdir error:  cannot create %s\n\
                 unable to process %s.\n";
static ZCONST char Far DirIsntDirectory[] =
  "checkdir error:  %s exists but is not directory\n\
                 unable to process %s.\n";
static ZCONST char Far PathTooLongTrunc[] =
  "checkdir warning:  path too long; truncating\n                   %s\n\
                -> %s\n";
#if (!defined(SFX) || defined(SFX_EXDIR))
   static ZCONST char Far CantCreateExtractDir[] =
     "checkdir:  cannot create extraction directory: %s\n";
#endif

#include <dirent.h>

#ifndef SFX

/************************/
/*  Function do_wild()  */   /* identical to OS/2 version */
/************************/

char *do_wild(__G__ wildspec)
    __GDEF
    ZCONST char *wildspec;   /* only used first time on a given dir */
{
    static DIR *wild_dir = (DIR *)NULL;
    static ZCONST char *wildname;
    static char *dirname, matchname[FILNAMSIZ];
    static int notfirstcall=FALSE, have_dirname, dirnamelen;
    char *fnamestart;
    struct dirent *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 (!notfirstcall) {    /* first call:  must initialize everything */
        notfirstcall = TRUE;

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

        /* break the wildspec into a directory part and a wildcard filename */
        if ((wildname = strrchr(wildspec, '/')) == (ZCONST char *)NULL &&
            (wildname = strrchr(wildspec, ':')) == (ZCONST char *)NULL) {
            dirname = ".";
            dirnamelen = 1;
            have_dirname = FALSE;
            wildname = wildspec;
        } else {
            ++wildname;     /* point at character after '/' or ':' */
            dirnamelen = (int)(wildname - wildspec);
            if ((dirname = (char *)malloc(dirnamelen+1)) == (char *)NULL) {
                Info(slide, 1, ((char *)slide,
                  LoadFarString(CantAllocateWildcard)));
                strncpy(matchname, wildspec, FILNAMSIZ);
                matchname[FILNAMSIZ-1] = '\0';
                return matchname;   /* but maybe filespec was not a wildcard */
            }
/* GRR:  cannot strip trailing char for opendir since might be "d:/" or "d:"
 *       (would have to check for "./" at end--let opendir handle it instead) */
            strncpy(dirname, wildspec, dirnamelen);
            dirname[dirnamelen] = '\0';   /* terminate for strcpy below */
            have_dirname = TRUE;
        }
        Trace((stderr, "do_wild:  dirname = [%s]\n", FnFilter1(dirname)));

        if ((wild_dir = opendir(dirname)) != (DIR *)NULL) {
            if (have_dirname) {
                strcpy(matchname, dirname);
                fnamestart = matchname + dirnamelen;
            } else
                fnamestart = matchname;
            while ((file = readdir(wild_dir)) != (struct dirent *)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, 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 matchname;
                }
            }
            /* if we get to here directory is exhausted, so close it */
            closedir(wild_dir);
            wild_dir = (DIR *)NULL;
        }
#ifdef DEBUG
        else {
            Trace((stderr, "do_wild:  opendir(%s) returns NULL\n",
              FnFilter1(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(matchname, wildspec, FILNAMSIZ);
        matchname[FILNAMSIZ-1] = '\0';
        return matchname;
    }

    /* last time through, might have failed opendir but returned raw wildspec */
    if (wild_dir == (DIR *)NULL) {
        notfirstcall = FALSE; /* nothing left to try--reset for new wildspec */
        if (have_dirname)
            free(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 (have_dirname) {
        /* strcpy(matchname, dirname); */
        fnamestart = matchname + dirnamelen;
    } else
        fnamestart = matchname;
    while ((file = readdir(wild_dir)) != (struct dirent *)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, 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 matchname;
        }
    }

    closedir(wild_dir);     /* have read at least one entry; nothing left */
    wild_dir = (DIR *)NULL;
    notfirstcall = FALSE;   /* reset for new wildspec */
    if (have_dirname)
        free(dirname);
    return (char *)NULL;

} /* end function do_wild() */

#endif /* !SFX */



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

int mapattr(__G)
    __GDEF
{
    /* set archive bit (file is not backed up): */
    G.pInfo->file_attr = (unsigned)(G.crec.external_file_attributes & 7) | 32;
    return 0;
}



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

int mapname(__G__ renamed)
    __GDEF
    int renamed;
/*
 * returns:
 *  MPN_OK          - no problem detected
 *  MPN_INF_TRUNC   - caution (truncated filename)
 *  MPN_INF_SKIP    - info "skip entry" (dir doesn't exist)
 *  MPN_ERR_SKIP    - error -> skip entry
 *  MPN_ERR_TOOLONG - error -> path is too long
 *  MPN_NOMEM       - error (memory allocation failed) -> skip entry
 *  [also MPN_VOL_LABEL, MPN_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 */
    char *last_dot=(char *)NULL;   /* last dot not converted to underscore */
    int dotname = FALSE;           /* path component begins with dot? */
    int killed_ddot = FALSE;       /* is set when skipping "../" pathcomp */
    int error = MPN_OK;
    register unsigned workch;      /* hold the character being tested */


    if (G.pInfo->vollabel)
        return MPN_VOL_LABEL;   /* Cannot set disk volume labels in FlexOS */

/*---------------------------------------------------------------------------
    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);

    created_dir = FALSE;        /* not yet */
    renamed_fullpath = FALSE;

    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] == '/') {
            renamed_fullpath = TRUE;
            pathcomp[0] = '/';  /* copy the '/' and terminate */
            pathcomp[1] = '\0';
            ++cp;
        } else if (isalpha((uch)G.filename[0]) && G.filename[1] == ':') {
            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) /* initialize path buf */
        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 */
            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.