/* miniunz.c Version 1.01e, February 12th, 2005 Copyright (C) 1998-2005 Gilles Vollant */ #include #include #include #include #include #include # include # include #include "unzip.h" #define CASESENSITIVITY (0) #define WRITEBUFFERSIZE (8192) #define MAXFILENAME (256) static int mymkdir( const char* dirname ) { int ret = 0; ret = mkdir ( dirname, 0775 ); return ret; } int makedir ( char *newdir ) { char *buffer ; char *p; int len = ( int )strlen( newdir ); if ( len <= 0 ) return 0; buffer = ( char* )malloc( len + 1 ); 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; } static char *fullfilename( const char *basedir, char *filename ) { char *file = ( char * ) malloc( strlen( basedir ) + strlen( filename ) + 1 ); if ( basedir == NULL ) { strcpy( file, filename ); } else { if ( basedir[strlen( basedir ) - 1] == '/' ) { sprintf( file, "%s%s", basedir, filename ); } else { sprintf( file, "%s/%s", basedir, filename ); } } return file; } static int do_extract_currentfile( unzFile uf, const int* popt_extract_without_path, int* popt_overwrite, const char* password, const char *basedir ) { char filename_inzip[256]; char* filename_withoutpath; char* filename_withpath; char* p; int err = UNZ_OK; FILE *fout = NULL; void* buf; uInt size_buf; unz_file_info file_info; err = unzGetCurrentFileInfo( 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; filename_withpath = fullfilename( basedir, filename_inzip ); while ( ( *p ) != '\0' ) { if ( ( ( *p ) == '/' ) || ( ( *p ) == '\\' ) ) filename_withoutpath = p + 1; p++; } if ( ( *filename_withoutpath ) == '\0' ) { if ( ( *popt_extract_without_path ) == 0 ) { // Fix the path, this will fail if the directoryname is the same as the first filename in the zip char *path = ( char * ) malloc( strlen( filename_withpath ) ); strcpy( path, filename_withpath ); char *ptr = strstr( path, filename_withoutpath ); *ptr = '\0'; // printf("creating directory: %s\n",path); mymkdir( path ); free( path ); } } else { char* write_filename; int skip = 0; if ( ( *popt_extract_without_path ) == 0 ) write_filename = filename_withpath; 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( 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( 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'; // Fix the path, this will fail if the directoryname is the same as the first filename in the zip char *path = ( char * ) malloc( strlen( write_filename ) ); strcpy( path, write_filename ); char *ptr = strstr( path, filename_withoutpath ); *ptr = '\0'; makedir( path ); free( path ); *( filename_withoutpath - 1 ) = c; fout = fopen( 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, err, 1, fout ) != 1 ) { // printf("error in writing extracted file\n"); err = UNZ_ERRNO; break; } } while ( err > 0 ); if ( fout ) fclose( fout ); } 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( filename_withpath ); free( buf ); return err; } int extractZip( unzFile uf, int opt_extract_without_path, int opt_overwrite, const char* password, const char *basedir ) { uLong i; unz_global_info gi; int err; err = unzGetGlobalInfo ( 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, basedir ) != 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; } int extractZipOnefile( unzFile uf, const char* filename, int opt_extract_without_path, int opt_overwrite, const char* password ) { 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, NULL ) == UNZ_OK ) return 0; else return 1; }