miniunz.c File Reference

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <errno.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <unistd.h>
#include <utime.h>
#include "unzip.h"

Go to the source code of this file.

Macros
#define	__USE_FILE_OFFSET64
#define	__USE_LARGEFILE64
#define	_LARGEFILE64_SOURCE
#define	_FILE_OFFSET_BIT   64
#define	FOPEN_FUNC(filename, mode)   fopen64(filename, mode)
#define	FTELLO_FUNC(stream)   ftello64(stream)
#define	FSEEKO_FUNC(stream, offset, origin)   fseeko64(stream, offset, origin)
#define	CASESENSITIVITY   (0)
#define	WRITEBUFFERSIZE   (8192)
#define	MAXFILENAME   (256)

Functions
static void	change_file_date (char *filename, uLong dosdate, tm_unz tmu_date) const
static int	mymkdir (char *dirname) const
static int	makedir (char *newdir) const
static void	do_banner ()
static void	do_help ()
static void	Display64BitsSize (ZPOS64_T n, int size_char)
static int	do_list (unzFile uf)
static int	do_extract_currentfile (unzFile uf, const int *popt_extract_without_path, int *popt_overwrite, const char *password)
static int	do_extract (unzFile uf, int opt_extract_without_path, int opt_overwrite, const char *password)
static int	do_extract_onefile (unzFile uf, const char *filename, int opt_extract_without_path, int opt_overwrite, const char *password)
int	main (int argc, argv)

Macro Definition Documentation

__USE_FILE_OFFSET64

#define __USE_FILE_OFFSET64

Definition at line 17 of file miniunz.c.

__USE_LARGEFILE64

#define __USE_LARGEFILE64

Definition at line 20 of file miniunz.c.

_FILE_OFFSET_BIT

#define _FILE_OFFSET_BIT   64

Definition at line 26 of file miniunz.c.

_LARGEFILE64_SOURCE

#define _LARGEFILE64_SOURCE

Definition at line 23 of file miniunz.c.

CASESENSITIVITY

#define CASESENSITIVITY   (0)

Definition at line 61 of file miniunz.c.

FOPEN_FUNC

#define FOPEN_FUNC	(		filename,
			mode
	)		fopen64(filename, mode)

Definition at line 36 of file miniunz.c.

FSEEKO_FUNC

#define FSEEKO_FUNC	(		stream,
			offset,
			origin
	)		fseeko64(stream, offset, origin)

Definition at line 38 of file miniunz.c.

FTELLO_FUNC

#define FTELLO_FUNC

(

stream

)

ftello64(stream)

Definition at line 37 of file miniunz.c.

MAXFILENAME

#define MAXFILENAME   (256)

Definition at line 63 of file miniunz.c.

WRITEBUFFERSIZE

#define WRITEBUFFERSIZE   (8192)

Definition at line 62 of file miniunz.c.

Function Documentation

change_file_date()

static void change_file_date ( char *  filename, uLong  dosdate, tm_unz  tmu_date  ) const

static

Definition at line 84 of file miniunz.c.

{
#ifdef _WIN32
  HANDLE hFile;
  FILETIME ftm,ftLocal,ftCreate,ftLastAcc,ftLastWrite;
 
  hFile = CreateFileA(filename,GENERIC_READ | GENERIC_WRITE,
                      0,NULL,OPEN_EXISTING,0,NULL);
  GetFileTime(hFile,&ftCreate,&ftLastAcc,&ftLastWrite);
  DosDateTimeToFileTime((WORD)(dosdate>>16),(WORD)dosdate,&ftLocal);
  LocalFileTimeToFileTime(&ftLocal,&ftm);
  SetFileTime(hFile,&ftm,&ftLastAcc,&ftm);
  CloseHandle(hFile);
#else
#if defined(unix) || defined(__APPLE__)
  (void)dosdate;
  struct utimbuf ut;
  struct tm newdate;
  newdate.tm_sec = tmu_date.tm_sec;
  newdate.tm_min=tmu_date.tm_min;
  newdate.tm_hour=tmu_date.tm_hour;
  newdate.tm_mday=tmu_date.tm_mday;
  newdate.tm_mon=tmu_date.tm_mon;
  if (tmu_date.tm_year > 1900)
      newdate.tm_year=tmu_date.tm_year - 1900;
  else
      newdate.tm_year=tmu_date.tm_year ;
  newdate.tm_isdst=-1;
 
  ut.actime=ut.modtime=mktime(&newdate);
  utime(filename,&ut);
#endif
#endif
}

References HANDLE, NULL, tm_unz_s::tm_hour, tm_unz_s::tm_mday, tm_unz_s::tm_min, tm_unz_s::tm_mon, tm_unz_s::tm_sec, tm_unz_s::tm_year, and utime.

Referenced by do_extract_currentfile().

Display64BitsSize()

static void Display64BitsSize ( ZPOS64_T  n, int  size_char  )

static

Definition at line 208 of file miniunz.c.

{
  /* to avoid compatibility problem , we do here the conversion */
  char number[21];
  int offset=19;
  int pos_string = 19;
  number[20]=0;
  for (;;) {
      number[offset]=(char)((n%10)+'0');
      if (number[offset] != '0')
          pos_string=offset;
      n/=10;
      if (offset==0)
          break;
      offset--;
  }
  {
      int size_display_string = 19-pos_string;
      while (size_char > size_display_string)
      {
          size_char--;
          printf(" ");
      }
  }
 
  printf("%s",&number[pos_string]);
}

References n, and printf().

Referenced by do_list().

do_banner()

static void do_banner ( )

static

Definition at line 190 of file miniunz.c.

{
    printf("MiniUnz 1.01b, demo of zLib + Unz package written by Gilles Vollant\n");
    printf("more info at http://www.winimage.com/zLibDll/unzip.html\n\n");
}

References printf().

Referenced by main().

do_extract()

static int do_extract ( unzFile  uf, int  opt_extract_without_path, int  opt_overwrite, const char*  password  )

static

Definition at line 476 of file miniunz.c.

{
    uLong i;
    unz_global_info64 gi;
    int err;
 
    err = unzGetGlobalInfo64(uf,&gi);
    if (err!=UNZ_OK)
        printf("error %d with zipfile in unzGetGlobalInfo \n",err);
 
    for (i=0;i<gi.number_entry;i++)
    {
        if (do_extract_currentfile(uf,&opt_extract_without_path,
                                      &opt_overwrite,
                                      password) != UNZ_OK)
            break;
 
        if ((i+1)<gi.number_entry)
        {
            err = unzGoToNextFile(uf);
            if (err!=UNZ_OK)
            {
                printf("error %d with zipfile in unzGoToNextFile\n",err);
                break;
            }
        }
    }
 
    return 0;
}

References do_extract_currentfile(), err, i, unz_global_info64_s::number_entry, printf(), UNZ_OK, unzGetGlobalInfo64(), and unzGoToNextFile().

Referenced by main().

do_extract_currentfile()

static int do_extract_currentfile ( unzFile  uf, const int*  popt_extract_without_path, int*  popt_overwrite, const char*  password  )

static

Definition at line 314 of file miniunz.c.

{
    char filename_inzip[256];
    char* filename_withoutpath;
    char* p;
    int err=UNZ_OK;
    FILE *fout=NULL;
    void* buf;
    uInt size_buf;
 
    unz_file_info64 file_info;
    err = unzGetCurrentFileInfo64(uf,&file_info,filename_inzip,sizeof(filename_inzip),NULL,0,NULL,0);
 
    if (err!=UNZ_OK)
    {
        printf("error %d with zipfile in unzGetCurrentFileInfo\n",err);
        return err;
    }
 
    size_buf = WRITEBUFFERSIZE;
    buf = (void*)malloc(size_buf);
    if (buf==NULL)
    {
        printf("Error allocating memory\n");
        return UNZ_INTERNALERROR;
    }
 
    p = filename_withoutpath = filename_inzip;
    while ((*p) != '\0')
    {
        if (((*p)=='/') || ((*p)=='\\'))
            filename_withoutpath = p+1;
        p++;
    }
 
    if ((*filename_withoutpath)=='\0')
    {
        if ((*popt_extract_without_path)==0)
        {
            printf("creating directory: %s\n",filename_inzip);
            mymkdir(filename_inzip);
        }
    }
    else
    {
        const char* write_filename;
        int skip=0;
 
        if ((*popt_extract_without_path)==0)
            write_filename = filename_inzip;
        else
            write_filename = filename_withoutpath;
 
        err = unzOpenCurrentFilePassword(uf,password);
        if (err!=UNZ_OK)
        {
            printf("error %d with zipfile in unzOpenCurrentFilePassword\n",err);
        }
 
        if (((*popt_overwrite)==0) && (err==UNZ_OK))
        {
            char rep=0;
            FILE* ftestexist;
            ftestexist = FOPEN_FUNC(write_filename,"rb");
            if (ftestexist!=NULL)
            {
                fclose(ftestexist);
                do
                {
                    char answer[128];
                    int ret;
 
                    printf("The file %s exists. Overwrite ? [y]es, [n]o, [A]ll: ",write_filename);
                    ret = scanf("%1s",answer);
                    if (ret != 1)
                    {
                       exit(EXIT_FAILURE);
                    }
                    rep = answer[0] ;
                    if ((rep>='a') && (rep<='z'))
                        rep -= 0x20;
                }
                while ((rep!='Y') && (rep!='N') && (rep!='A'));
            }
 
            if (rep == 'N')
                skip = 1;
 
            if (rep == 'A')
                *popt_overwrite=1;
        }
 
        if ((skip==0) && (err==UNZ_OK))
        {
            fout=FOPEN_FUNC(write_filename,"wb");
            /* some zipfile don't contain directory alone before file */
            if ((fout==NULL) && ((*popt_extract_without_path)==0) &&
                                (filename_withoutpath!=(char*)filename_inzip))
            {
                char c=*(filename_withoutpath-1);
                *(filename_withoutpath-1)='\0';
                makedir(write_filename);
                *(filename_withoutpath-1)=c;
                fout=FOPEN_FUNC(write_filename,"wb");
            }
 
            if (fout==NULL)
            {
                printf("error opening %s\n",write_filename);
            }
        }
 
        if (fout!=NULL)
        {
            printf(" extracting: %s\n",write_filename);
 
            do
            {
                err = unzReadCurrentFile(uf,buf,size_buf);
                if (err<0)
                {
                    printf("error %d with zipfile in unzReadCurrentFile\n",err);
                    break;
                }
                if (err>0)
                    if (fwrite(buf,(unsigned)err,1,fout)!=1)
                    {
                        printf("error in writing extracted file\n");
                        err=UNZ_ERRNO;
                        break;
                    }
            }
            while (err>0);
            if (fout)
                    fclose(fout);
 
            if (err==0)
                change_file_date(write_filename,file_info.dosDate,
                                 file_info.tmu_date);
        }
 
        if (err==UNZ_OK)
        {
            err = unzCloseCurrentFile (uf);
            if (err!=UNZ_OK)
            {
                printf("error %d with zipfile in unzCloseCurrentFile\n",err);
            }
        }
        else
            unzCloseCurrentFile(uf); /* don't lose the error */
    }
 
    free(buf);
    return err;
}

References c, change_file_date(), unz_file_info64_s::dosDate, err, test-lz4-list::exit, benchmark::FILE, FOPEN_FUNC, free(), makedir(), malloc(), mymkdir(), NULL, p, printf(), skip(), unz_file_info64_s::tmu_date, UNZ_ERRNO, UNZ_INTERNALERROR, UNZ_OK, unzCloseCurrentFile(), unzGetCurrentFileInfo64(), unzOpenCurrentFilePassword(), unzReadCurrentFile(), and WRITEBUFFERSIZE.

Referenced by do_extract(), and do_extract_onefile().

do_extract_onefile()

static int do_extract_onefile ( unzFile  uf, const char*  filename, int  opt_extract_without_path, int  opt_overwrite, const char*  password  )

static

Definition at line 511 of file miniunz.c.

{
    if (unzLocateFile(uf,filename,CASESENSITIVITY)!=UNZ_OK)
    {
        printf("file %s not found in the zipfile\n",filename);
        return 2;
    }
 
    if (do_extract_currentfile(uf,&opt_extract_without_path,
                                      &opt_overwrite,
                                      password) == UNZ_OK)
        return 0;
    else
        return 1;
}

References CASESENSITIVITY, do_extract_currentfile(), printf(), UNZ_OK, and unzLocateFile().

Referenced by main().

do_help()

static void do_help ( )

static

Definition at line 196 of file miniunz.c.

{
    printf("Usage : miniunz [-e] [-x] [-v] [-l] [-o] [-p password] file.zip [file_to_extr.] [-d extractdir]\n\n" \
           "  -e  Extract without pathname (junk paths)\n" \
           "  -x  Extract with pathname\n" \
           "  -v  list files\n" \
           "  -l  list files\n" \
           "  -d  directory to extract into\n" \
           "  -o  overwrite files without prompting\n" \
           "  -p  extract crypted file using password\n\n");
}

References printf().

Referenced by main().

do_list()

static int do_list ( unzFile  uf )

static

Definition at line 236 of file miniunz.c.

{
    uLong i;
    unz_global_info64 gi;
    int err;
 
    err = unzGetGlobalInfo64(uf,&gi);
    if (err!=UNZ_OK)
        printf("error %d with zipfile in unzGetGlobalInfo \n",err);
    printf("  Length  Method     Size Ratio   Date    Time   CRC-32     Name\n");
    printf("  ------  ------     ---- -----   ----    ----   ------     ----\n");
    for (i=0;i<gi.number_entry;i++)
    {
        char filename_inzip[256];
        unz_file_info64 file_info;
        uLong ratio=0;
        const char *string_method;
        char charCrypt=' ';
        err = unzGetCurrentFileInfo64(uf,&file_info,filename_inzip,sizeof(filename_inzip),NULL,0,NULL,0);
        if (err!=UNZ_OK)
        {
            printf("error %d with zipfile in unzGetCurrentFileInfo\n",err);
            break;
        }
        if (file_info.uncompressed_size>0)
            ratio = (uLong)((file_info.compressed_size*100)/file_info.uncompressed_size);
 
        /* display a '*' if the file is crypted */
        if ((file_info.flag & 1) != 0)
            charCrypt='*';
 
        if (file_info.compression_method==0)
            string_method="Stored";
        else
        if (file_info.compression_method==Z_DEFLATED)
        {
            uInt iLevel=(uInt)((file_info.flag & 0x6)/2);
            if (iLevel==0)
              string_method="Defl:N";
            else if (iLevel==1)
              string_method="Defl:X";
            else if ((iLevel==2) || (iLevel==3))
              string_method="Defl:F"; /* 2:fast , 3 : extra fast*/
        }
        else
        if (file_info.compression_method==Z_BZIP2ED)
        {
              string_method="BZip2 ";
        }
        else
            string_method="Unkn. ";
 
        Display64BitsSize(file_info.uncompressed_size,7);
        printf("  %6s%c",string_method,charCrypt);
        Display64BitsSize(file_info.compressed_size,7);
        printf(" %3lu%%  %2.2lu-%2.2lu-%2.2lu  %2.2lu:%2.2lu  %8.8lx   %s\n",
                ratio,
                (uLong)file_info.tmu_date.tm_mon + 1,
                (uLong)file_info.tmu_date.tm_mday,
                (uLong)file_info.tmu_date.tm_year % 100,
                (uLong)file_info.tmu_date.tm_hour,(uLong)file_info.tmu_date.tm_min,
                (uLong)file_info.crc,filename_inzip);
        if ((i+1)<gi.number_entry)
        {
            err = unzGoToNextFile(uf);
            if (err!=UNZ_OK)
            {
                printf("error %d with zipfile in unzGoToNextFile\n",err);
                break;
            }
        }
    }
 
    return 0;
}

References unz_file_info64_s::compressed_size, unz_file_info64_s::compression_method, unz_file_info64_s::crc, Display64BitsSize(), err, unz_file_info64_s::flag, i, NULL, unz_global_info64_s::number_entry, printf(), tm_unz_s::tm_hour, tm_unz_s::tm_mday, tm_unz_s::tm_min, tm_unz_s::tm_mon, tm_unz_s::tm_year, unz_file_info64_s::tmu_date, unz_file_info64_s::uncompressed_size, UNZ_OK, unzGetCurrentFileInfo64(), unzGetGlobalInfo64(), unzGoToNextFile(), Z_BZIP2ED, and Z_DEFLATED.

Referenced by main().

main()

int main	(	int	argc,
		argv
	)

Definition at line 533 of file miniunz.c.

{
    const char *zipfilename=NULL;
    const char *filename_to_extract=NULL;
    const char *password=NULL;
    char filename_try[MAXFILENAME+16] = "";
    int i;
    int ret_value=0;
    int opt_do_list=0;
    int opt_do_extract=1;
    int opt_do_extract_withoutpath=0;
    int opt_overwrite=0;
    int opt_extractdir=0;
    const char *dirname=NULL;
    unzFile uf=NULL;
 
    do_banner();
    if (argc==1)
    {
        do_help();
        return 0;
    }
    else
    {
        for (i=1;i<argc;i++)
        {
            if ((*argv[i])=='-')
            {
                const char *p=argv[i]+1;
 
                while ((*p)!='\0')
                {
                    char c=*(p++);;
                    if ((c=='l') || (c=='L'))
                        opt_do_list = 1;
                    if ((c=='v') || (c=='V'))
                        opt_do_list = 1;
                    if ((c=='x') || (c=='X'))
                        opt_do_extract = 1;
                    if ((c=='e') || (c=='E'))
                        opt_do_extract = opt_do_extract_withoutpath = 1;
                    if ((c=='o') || (c=='O'))
                        opt_overwrite=1;
                    if ((c=='d') || (c=='D'))
                    {
                        opt_extractdir=1;
                        dirname=argv[i+1];
                    }
 
                    if (((c=='p') || (c=='P')) && (i+1<argc))
                    {
                        password=argv[i+1];
                        i++;
                    }
                }
            }
            else
            {
                if (zipfilename == NULL)
                    zipfilename = argv[i];
                else if ((filename_to_extract==NULL) && (!opt_extractdir))
                        filename_to_extract = argv[i] ;
            }
        }
    }
 
    if (zipfilename!=NULL)
    {
 
#        ifdef USEWIN32IOAPI
        zlib_filefunc64_def ffunc;
#        endif
 
        strncpy(filename_try, zipfilename,MAXFILENAME-1);
        /* strncpy doesnt append the trailing NULL, of the string is too long. */
        filename_try[ MAXFILENAME ] = '\0';
 
#        ifdef USEWIN32IOAPI
        fill_win32_filefunc64A(&ffunc);
        uf = unzOpen2_64(zipfilename,&ffunc);
#        else
        uf = unzOpen64(zipfilename);
#        endif
        if (uf==NULL)
        {
            strcat(filename_try,".zip");
#            ifdef USEWIN32IOAPI
            uf = unzOpen2_64(filename_try,&ffunc);
#            else
            uf = unzOpen64(filename_try);
#            endif
        }
    }
 
    if (uf==NULL)
    {
        printf("Cannot open %s or %s.zip\n",zipfilename,zipfilename);
        return 1;
    }
    printf("%s opened\n",filename_try);
 
    if (opt_do_list==1)
        ret_value = do_list(uf);
    else if (opt_do_extract==1)
    {
#ifdef _WIN32
        if (opt_extractdir && _chdir(dirname))
#else
        if (opt_extractdir && chdir(dirname))
#endif
        {
          printf("Error changing into %s, aborting\n", dirname);
          exit(-1);
        }
 
        if (filename_to_extract == NULL)
            ret_value = do_extract(uf, opt_do_extract_withoutpath, opt_overwrite, password);
        else
            ret_value = do_extract_onefile(uf, filename_to_extract, opt_do_extract_withoutpath, opt_overwrite, password);
    }
 
    unzClose(uf);
 
    return ret_value;
}

References argv, c, chdir, do_banner(), do_extract(), do_extract_onefile(), do_help(), do_list(), test-lz4-list::exit, fill_win32_filefunc64A(), i, MAXFILENAME, NULL, p, printf(), unzClose(), unzOpen2_64(), and unzOpen64().

makedir()

static int makedir ( char *  newdir ) const

static

Definition at line 140 of file miniunz.c.

{
  char *buffer ;
  char *p;
  size_t len = strlen(newdir);
 
  if (len == 0)
    return 0;
 
  buffer = (char*)malloc(len+1);
        if (buffer==NULL)
        {
                printf("Error allocating memory\n");
                return UNZ_INTERNALERROR;
        }
  strcpy(buffer,newdir);
 
  if (buffer[len-1] == '/') {
    buffer[len-1] = '\0';
  }
  if (mymkdir(buffer) == 0)
    {
      free(buffer);
      return 1;
    }
 
  p = buffer+1;
  while (1)
    {
      char hold;
 
      while(*p && *p != '\\' && *p != '/')
        p++;
      hold = *p;
      *p = 0;
      if ((mymkdir(buffer) == -1) && (errno == ENOENT))
        {
          printf("couldn't create directory %s\n",buffer);
          free(buffer);
          return 0;
        }
      if (hold == 0)
        break;
      *p++ = hold;
    }
  free(buffer);
  return 1;
}

References ENOENT, free(), len, malloc(), mymkdir(), NULL, p, printf(), and UNZ_INTERNALERROR.

Referenced by do_extract_currentfile().

mymkdir()

static int mymkdir ( char*  dirname ) const

static

Definition at line 126 of file miniunz.c.

{
    int ret=0;
#ifdef _WIN32
    ret = _mkdir(dirname);
#elif unix
    ret = mkdir (dirname,0775);
#elif __APPLE__
    ret = mkdir (dirname,0775);
#endif
    return ret;
}

References mkdir.

Referenced by do_extract_currentfile(), and makedir().