qdos.c

完整的解压zip文件的源码。包含密码功能

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

  qdos.c

  QDOS-specific routines for use with Info-ZIP's UnZip 5.3 and later.

  Contains:  Qstrfix()
             QFilename()
             QMatch()
             chowner()
             Qgetch()
             QReturn()
             LastDir()
             do_wild()           <-- generic enough to put in file_io.c?
             mapattr()
             mapname()
             checkdir()
             qfix()
             close_outfile()
             stamp_file()
             getp()
             version()

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

#define UNZIP_INTERNAL

#include "unzip.h"
#include "crypt.h"
#include "ttyio.h"
#include <dirent.h>
#include "izqdos.h"
#include "version.h"

#ifndef SFX
char _prog_name[] = "UnZip";
#else
char _prog_name[] = "??Special Flag for unzipsfx hack  ??";
#endif
/* sorrid hack at request of GRR follows; hope the compiler stays kind to us */
char _version[] = {UZ_MAJORVER+'0','.',UZ_MINORVER+'0',PATCHLEVEL+'0'};
char _extra[] = " " BETALEVEL;
char _copyright[] = "(c) Info-ZIP Group";
char *  _endmsg = NULL;
long _stack = 16*1024;         /* huge stack (for qdos) */

extern void consetup_title(chanid_t,struct WINDOWDEF *);
void (*_consetup)(chanid_t,struct WINDOWDEF *) = consetup_title;

struct WINDOWDEF _condetails =
{
    2,
    1,
    0,
    7,
    500,
    220,
    2,
    30
};


static jobid_t chowner(chanid_t chan)
{
    extern char *_sys_var;
    char *scht;
    long *cdb;
    long jid;

    scht = *((char **)(_sys_var + 0x78));
    cdb = *(long **)((long *)scht  + (chan & 0xffff));
    jid = *(cdb + 2);
    return jid;
}

int QReturn(int err)
{
    jobid_t me,you;

    me = getpid();
    you = chowner(getchid(0));

    if((me == you) && ((qlflag & 4) == 0))
    {
        if(isatty(0) && isatty(2) && qlwait)
        {
            char c = 0;
            fputs("Press a key to exit", stderr);
            if((io_fbyte(getchid(0), qlwait, &c) == 0) && c == 27)
            {
                io_fbyte(getchid(0), -1, &c);
            }
        }
    }
    exit(err);
}

#ifndef FUNZIP

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

char *Qstrfix (char *p)
{
    char *q;
    for (q = p; (q = strstr(q, ".zip"));)
    {
        memcpy(q, "_zip", 4);
        q += 4;
    }
    return p;
}

void QFilename(char *f)
{
    char *o,*p,*q = strdup(f);
    p = q;

    if(*q == '.' && *(q+1) == '/') q += 2;
    o = q;

    for(;*q;q++)
    {
        if(*q == '/') *q = '_';
        if((qlflag & 1) == 0)
        {
            if(*q == '.') *q = '_';
        }
    }
    strcpy(f,o);
    free(p);
}

int QMatch(uch c1, uch c2)
{
    int m =0;

    if(c1 != c2)
    {
        if(c1 == '_' && (c2 == '.' || c2 == '/'))
        {
            m = 1;
        }
    }
    else
    {
        m = 1;
    }
    return m;
}


int Qgetch(void)
{
    char ch;

    if(io_fbyte(getchid(0), -1, &ch) < 0)
    {
        return EOF;
    }
    else
    {
        return (int) ch;
    }
}

#ifndef SFX
char *LastDir(char *ws)
{
    char *p;
    char *q = ws;
    struct stat s;

    for(p = ws; *p; p++)
    {
        if(*p == '_')
        {
            char c;

            p++;
            c = *p;
            *p = 0;
            if(stat(ws, &s) == 0 && S_ISDIR(s.st_mode))
            {
                q = p;
            }
            *p = c;
        }
    }
    return q;
}


/**********************/
/* Function do_wild() */   /* for porting:  dir separator; match(ignore_case) */
/**********************/

char *do_wild(__G__ wildspec)
    __GDEF
    char *wildspec;         /* only used first time on a given dir */
{
    static DIR *dir = (DIR *)NULL;
    static char *dirname, *wildname, matchname[FILNAMSIZ];
    static int firstcall=TRUE, have_dirname, dirnamelen;
    struct dirent *file;
    char basedir[40];

    /* 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 (firstcall) {        /* first call:  must initialize everything */
        char *ws = NULL, *us = NULL;

        firstcall = FALSE;

        /* break the wildspec into a directory part and a wildcard filename */

        ws = (char *) iswild(wildspec);

        if(ws == NULL)
        {
            strcpy(matchname, wildspec);
            return matchname;
        }

        us = LastDir(wildspec);

        if(us == wildspec)
        {
            dirname = basedir;
            getcwd(basedir, sizeof(basedir)-1);
            dirnamelen = strlen(basedir);
            have_dirname = FALSE;
            wildname = wildspec;
        } else {
            wildname = us;     /* point at character after '/' */
            dirnamelen = wildname - wildspec;
            if ((dirname = (char *)malloc(dirnamelen+1)) == (char *)NULL) {
                Info(slide, 0x201, ((char *)slide,
                  "warning:  cannot allocate wildcard buffers\n"));
                strcpy(matchname, wildspec);
                return matchname;   /* but maybe filespec was not a wildcard */
            }
            strncpy(dirname, wildspec, dirnamelen);
            dirname[dirnamelen] = '\0';   /* terminate for strcpy below */
            have_dirname = TRUE;
        }

        if ((dir = opendir(dirname)) != (DIR *)NULL) {
            while ((file = readdir(dir)) != (struct dirent *)NULL) {
                if (match(file->d_name, wildname, 2)) {  /* 0 == case sens. */
                    if (have_dirname) {
                        strcpy(matchname, dirname);
                        strcpy(matchname+dirnamelen, file->d_name);
                    } else
                        strcpy(matchname, file->d_name);
                    return matchname;
                }
            }
            /* if we get to here directory is exhausted, so close it */
            closedir(dir);
            dir = (DIR *)NULL;
        }

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

    /* last time through, might have failed opendir but returned raw wildspec */
    if (dir == (DIR *)NULL) {
        firstcall = TRUE;  /* 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.
     */
    while ((file = readdir(dir)) != (struct dirent *)NULL)
        if (match(file->d_name, wildname, 2)) {   /* 0 == don't ignore case */
            if (have_dirname) {
                /* strcpy(matchname, dirname); */
                strcpy(matchname+dirnamelen, file->d_name);
            } else
                strcpy(matchname, file->d_name);
            return matchname;
        }

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

} /* end function do_wild() */

#endif /* !SFX */





/**********************/
/* Function mapattr() */
/**********************/
int mapattr(__G)
    __GDEF
{
    ulg tmp = G.crec.external_file_attributes;

    switch (G.pInfo->hostnum) {
        case AMIGA_:
            tmp = (unsigned)(tmp>>17 & 7);   /* Amiga RWE bits */
            G.pInfo->file_attr = (unsigned)(tmp<<6 | tmp<<3 | tmp);
            break;
        case QDOS_:
        case UNIX_:
        case VMS_:
        case ACORN_:
        case ATARI_:
        case BEOS_:
            G.pInfo->file_attr = (unsigned)(tmp >> 16);
            if (G.pInfo->file_attr != 0 || !G.extra_field) {
                return 0;
            } else {
                /* Some (non-Info-ZIP) implementations of Zip for Unix and
                   VMS (and probably others ??) leave 0 in the upper 16-bit
                   part of the external_file_attributes field. Instead, they
                   store file permission attributes in some extra field.
                   As a work-around, we search for the presence of one of
                   these extra fields and fall back to the MSDOS compatible
                   part of external_file_attributes if one of the known
                   e.f. types has been detected.