509 lines
11 KiB
C
509 lines
11 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <time.h>
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#include <errno.h>
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#include <fcntl.h>
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#ifdef unix
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# include <unistd.h>
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# include <utime.h>
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#else
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# include <direct.h>
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# include <io.h>
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#endif
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#include "unzip.h"
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#define CASESENSITIVITY (0)
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#define WRITEBUFFERSIZE (8192)
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/*
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mini unzip, demo of unzip package
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usage :
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Usage : miniunz [-exvlo] file.zip [file_to_extract]
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list the file in the zipfile, and print the content of FILE_ID.ZIP or README.TXT
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if it exists
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*/
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/* change_file_date : change the date/time of a file
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filename : the filename of the file where date/time must be modified
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dosdate : the new date at the MSDos format (4 bytes)
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tmu_date : the SAME new date at the tm_unz format */
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void change_file_date(filename,dosdate,tmu_date)
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const char *filename;
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uLong dosdate;
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tm_unz tmu_date;
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{
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#ifdef WIN32
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HANDLE hFile;
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FILETIME ftm,ftLocal,ftCreate,ftLastAcc,ftLastWrite;
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hFile = CreateFile(filename,GENERIC_READ | GENERIC_WRITE,
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0,NULL,OPEN_EXISTING,0,NULL);
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GetFileTime(hFile,&ftCreate,&ftLastAcc,&ftLastWrite);
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DosDateTimeToFileTime((WORD)(dosdate>>16),(WORD)dosdate,&ftLocal);
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LocalFileTimeToFileTime(&ftLocal,&ftm);
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SetFileTime(hFile,&ftm,&ftLastAcc,&ftm);
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CloseHandle(hFile);
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#else
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#ifdef unix
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struct utimbuf ut;
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struct tm newdate;
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newdate.tm_sec = tmu_date.tm_sec;
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newdate.tm_min=tmu_date.tm_min;
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newdate.tm_hour=tmu_date.tm_hour;
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newdate.tm_mday=tmu_date.tm_mday;
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newdate.tm_mon=tmu_date.tm_mon;
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if (tmu_date.tm_year > 1900)
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newdate.tm_year=tmu_date.tm_year - 1900;
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else
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newdate.tm_year=tmu_date.tm_year ;
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newdate.tm_isdst=-1;
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ut.actime=ut.modtime=mktime(&newdate);
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utime(filename,&ut);
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#endif
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#endif
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}
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/* mymkdir and change_file_date are not 100 % portable
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As I don't know well Unix, I wait feedback for the unix portion */
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int mymkdir(dirname)
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const char* dirname;
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{
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int ret=0;
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#ifdef WIN32
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ret = mkdir(dirname);
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#else
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#ifdef unix
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ret = mkdir (dirname,0775);
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#endif
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#endif
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return ret;
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}
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int makedir (newdir)
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char *newdir;
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{
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char *buffer ;
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char *p;
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int len = strlen(newdir);
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if (len <= 0)
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return 0;
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buffer = (char*)malloc(len+1);
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strcpy(buffer,newdir);
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if (buffer[len-1] == '/') {
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buffer[len-1] = '\0';
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}
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if (mymkdir(buffer) == 0)
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{
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free(buffer);
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return 1;
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}
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p = buffer+1;
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while (1)
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{
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char hold;
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while(*p && *p != '\\' && *p != '/')
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p++;
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hold = *p;
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*p = 0;
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if ((mymkdir(buffer) == -1) && (errno == ENOENT))
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{
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printf("couldn't create directory %s\n",buffer);
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free(buffer);
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return 0;
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}
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if (hold == 0)
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break;
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*p++ = hold;
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}
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free(buffer);
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return 1;
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}
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void do_banner()
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{
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printf("MiniUnz 0.15, demo of zLib + Unz package written by Gilles Vollant\n");
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printf("more info at http://wwww.winimage/zLibDll/unzip.htm\n\n");
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}
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void do_help()
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{
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printf("Usage : miniunz [-exvlo] file.zip [file_to_extract]\n\n") ;
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}
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int do_list(uf)
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unzFile uf;
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{
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uLong i;
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unz_global_info gi;
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int err;
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err = unzGetGlobalInfo (uf,&gi);
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if (err!=UNZ_OK)
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printf("error %d with zipfile in unzGetGlobalInfo \n",err);
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printf(" Length Method Size Ratio Date Time CRC-32 Name\n");
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printf(" ------ ------ ---- ----- ---- ---- ------ ----\n");
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for (i=0;i<gi.number_entry;i++)
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{
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char filename_inzip[256];
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unz_file_info file_info;
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uLong ratio=0;
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const char *string_method;
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err = unzGetCurrentFileInfo(uf,&file_info,filename_inzip,sizeof(filename_inzip),NULL,0,NULL,0);
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if (err!=UNZ_OK)
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{
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printf("error %d with zipfile in unzGetCurrentFileInfo\n",err);
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break;
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}
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if (file_info.uncompressed_size>0)
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ratio = (file_info.compressed_size*100)/file_info.uncompressed_size;
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if (file_info.compression_method==0)
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string_method="Stored";
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else
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if (file_info.compression_method==Z_DEFLATED)
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{
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uInt iLevel=(uInt)((file_info.flag & 0x6)/2);
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if (iLevel==0)
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string_method="Defl:N";
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else if (iLevel==1)
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string_method="Defl:X";
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else if ((iLevel==2) || (iLevel==3))
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string_method="Defl:F"; /* 2:fast , 3 : extra fast*/
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}
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else
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string_method="Unkn. ";
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printf("%7lu %6s %7lu %3lu%% %2.2lu-%2.2lu-%2.2lu %2.2lu:%2.2lu %8.8lx %s\n",
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file_info.uncompressed_size,string_method,file_info.compressed_size,
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ratio,
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(uLong)file_info.tmu_date.tm_mon + 1,
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(uLong)file_info.tmu_date.tm_mday,
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(uLong)file_info.tmu_date.tm_year % 100,
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(uLong)file_info.tmu_date.tm_hour,(uLong)file_info.tmu_date.tm_min,
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(uLong)file_info.crc,filename_inzip);
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if ((i+1)<gi.number_entry)
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{
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err = unzGoToNextFile(uf);
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if (err!=UNZ_OK)
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{
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printf("error %d with zipfile in unzGoToNextFile\n",err);
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break;
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}
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}
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}
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return 0;
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}
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int do_extract_currentfile(uf,popt_extract_without_path,popt_overwrite)
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unzFile uf;
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const int* popt_extract_without_path;
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int* popt_overwrite;
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{
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char filename_inzip[256];
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char* filename_withoutpath;
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char* p;
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int err=UNZ_OK;
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FILE *fout=NULL;
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void* buf;
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uInt size_buf;
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unz_file_info file_info;
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uLong ratio=0;
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err = unzGetCurrentFileInfo(uf,&file_info,filename_inzip,sizeof(filename_inzip),NULL,0,NULL,0);
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if (err!=UNZ_OK)
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{
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printf("error %d with zipfile in unzGetCurrentFileInfo\n",err);
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return err;
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}
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size_buf = WRITEBUFFERSIZE;
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buf = (void*)malloc(size_buf);
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if (buf==NULL)
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{
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printf("Error allocating memory\n");
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return UNZ_INTERNALERROR;
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}
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p = filename_withoutpath = filename_inzip;
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while ((*p) != '\0')
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{
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if (((*p)=='/') || ((*p)=='\\'))
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filename_withoutpath = p+1;
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p++;
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}
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if ((*filename_withoutpath)=='\0')
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{
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if ((*popt_extract_without_path)==0)
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{
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printf("creating directory: %s\n",filename_inzip);
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mymkdir(filename_inzip);
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}
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}
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else
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{
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const char* write_filename;
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int skip=0;
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if ((*popt_extract_without_path)==0)
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write_filename = filename_inzip;
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else
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write_filename = filename_withoutpath;
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err = unzOpenCurrentFile(uf);
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if (err!=UNZ_OK)
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{
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printf("error %d with zipfile in unzOpenCurrentFile\n",err);
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}
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if (((*popt_overwrite)==0) && (err==UNZ_OK))
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{
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char rep;
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FILE* ftestexist;
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ftestexist = fopen(write_filename,"rb");
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if (ftestexist!=NULL)
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{
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fclose(ftestexist);
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do
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{
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char answer[128];
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printf("The file %s exist. Overwrite ? [y]es, [n]o, [A]ll: ",write_filename);
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scanf("%1s",answer);
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rep = answer[0] ;
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if ((rep>='a') && (rep<='z'))
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rep -= 0x20;
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}
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while ((rep!='Y') && (rep!='N') && (rep!='A'));
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}
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if (rep == 'N')
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skip = 1;
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if (rep == 'A')
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*popt_overwrite=1;
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}
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if ((skip==0) && (err==UNZ_OK))
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{
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fout=fopen(write_filename,"wb");
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/* some zipfile don't contain directory alone before file */
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if ((fout==NULL) && ((*popt_extract_without_path)==0) &&
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(filename_withoutpath!=(char*)filename_inzip))
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{
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char c=*(filename_withoutpath-1);
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*(filename_withoutpath-1)='\0';
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makedir(write_filename);
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*(filename_withoutpath-1)=c;
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fout=fopen(write_filename,"wb");
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}
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if (fout==NULL)
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{
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printf("error opening %s\n",write_filename);
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}
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}
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if (fout!=NULL)
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{
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printf(" extracting: %s\n",write_filename);
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do
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{
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err = unzReadCurrentFile(uf,buf,size_buf);
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if (err<0)
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{
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printf("error %d with zipfile in unzReadCurrentFile\n",err);
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break;
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}
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if (err>0)
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if (fwrite(buf,err,1,fout)!=1)
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{
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printf("error in writing extracted file\n");
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err=UNZ_ERRNO;
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break;
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}
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}
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while (err>0);
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fclose(fout);
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if (err==0)
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change_file_date(write_filename,file_info.dosDate,
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file_info.tmu_date);
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}
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if (err==UNZ_OK)
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{
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err = unzCloseCurrentFile (uf);
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if (err!=UNZ_OK)
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{
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printf("error %d with zipfile in unzCloseCurrentFile\n",err);
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}
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}
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else
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unzCloseCurrentFile(uf); /* don't lose the error */
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}
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free(buf);
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return err;
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}
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int do_extract(uf,opt_extract_without_path,opt_overwrite)
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unzFile uf;
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int opt_extract_without_path;
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int opt_overwrite;
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{
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uLong i;
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unz_global_info gi;
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int err;
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FILE* fout=NULL;
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err = unzGetGlobalInfo (uf,&gi);
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if (err!=UNZ_OK)
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printf("error %d with zipfile in unzGetGlobalInfo \n",err);
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for (i=0;i<gi.number_entry;i++)
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{
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if (do_extract_currentfile(uf,&opt_extract_without_path,
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&opt_overwrite) != UNZ_OK)
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break;
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if ((i+1)<gi.number_entry)
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{
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err = unzGoToNextFile(uf);
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if (err!=UNZ_OK)
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{
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printf("error %d with zipfile in unzGoToNextFile\n",err);
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break;
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}
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}
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}
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return 0;
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}
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int do_extract_onefile(uf,filename,opt_extract_without_path,opt_overwrite)
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unzFile uf;
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const char* filename;
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int opt_extract_without_path;
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int opt_overwrite;
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{
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int err = UNZ_OK;
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if (unzLocateFile(uf,filename,CASESENSITIVITY)!=UNZ_OK)
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{
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printf("file %s not found in the zipfile\n",filename);
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return 2;
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}
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if (do_extract_currentfile(uf,&opt_extract_without_path,
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&opt_overwrite) == UNZ_OK)
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return 0;
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else
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return 1;
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}
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int main(argc,argv)
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int argc;
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char *argv[];
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{
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const char *zipfilename=NULL;
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const char *filename_to_extract=NULL;
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int i;
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int opt_do_list=0;
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int opt_do_extract=1;
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int opt_do_extract_withoutpath=0;
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int opt_overwrite=0;
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char filename_try[512];
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unzFile uf=NULL;
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do_banner();
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if (argc==1)
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{
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do_help();
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exit(0);
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}
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else
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{
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for (i=1;i<argc;i++)
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{
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if ((*argv[i])=='-')
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{
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const char *p=argv[i]+1;
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while ((*p)!='\0')
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{
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char c=*(p++);;
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if ((c=='l') || (c=='L'))
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opt_do_list = 1;
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if ((c=='v') || (c=='V'))
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opt_do_list = 1;
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if ((c=='x') || (c=='X'))
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opt_do_extract = 1;
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if ((c=='e') || (c=='E'))
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opt_do_extract = opt_do_extract_withoutpath = 1;
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if ((c=='o') || (c=='O'))
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opt_overwrite=1;
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}
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}
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else
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{
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if (zipfilename == NULL)
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zipfilename = argv[i];
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else if (filename_to_extract==NULL)
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filename_to_extract = argv[i] ;
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}
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}
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}
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if (zipfilename!=NULL)
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{
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strcpy(filename_try,zipfilename);
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uf = unzOpen(zipfilename);
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if (uf==NULL)
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{
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strcat(filename_try,".zip");
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uf = unzOpen(filename_try);
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}
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}
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if (uf==NULL)
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{
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printf("Cannot open %s or %s.zip\n",zipfilename,zipfilename);
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exit (1);
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}
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printf("%s opened\n",filename_try);
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if (opt_do_list==1)
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return do_list(uf);
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else if (opt_do_extract==1)
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{
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if (filename_to_extract == NULL)
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return do_extract(uf,opt_do_extract_withoutpath,opt_overwrite);
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else
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return do_extract_onefile(uf,filename_to_extract,
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opt_do_extract_withoutpath,opt_overwrite);
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}
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unzCloseCurrentFile(uf);
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return 0; /* to avoid warning */
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}
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