Daily Archives: August 16, 2015

libtar and its api

libtar is small but effective library, although it has some bugs when dealing with long path.

The Steps are following:
download libtar-1.2.11 and uncompress it, the main path is /path/libtar-1.2.11

build with command “./configure && make”, if you want to debug, add “-g” for gcc to build.

make “test” folder “/path/libtar-1.2.11/test”. find header file and libtar.a file

put 1.c in “/path/libtar-1.2.11/test”

so finally, the build command will be “g++ 1.c -o 1 ../lib/libtar.a -I ../bin/libtar-1.2.11/include”

some important code, for example, char* subfile1 = “./sub1/1.txt”
this is for file under sub folder.

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 #include <tar.h>  
 #include <libtar.h>  
 #include <iostream>                                                             
 #include <fcntl.h>    
 
 using namespace std;                               
 
 int main(){                                                        
     // tar                         
     if(1){                                                          
         TAR* tar_handle;
         char* tar_fname = "test.tar";
         tar_open(&amp;tar_handle, tar_fname, NULL,  O_WRONLY | O_CREAT,  0644,  TAR_GNU);
         char* subfile1 = "./sub1/1.txt";
         tar_append_file(tar_handle, subfile1,  subfile1);
         char* subfile2 = "test1.c";
         tar_append_file(tar_handle, subfile2,  subfile2);
         tar_close(tar_handle);
     }
 
     // untar
     if(0){
         TAR* tar_handle;
         char* tar_fname = "test.tar";
         tar_open(&amp;tar_handle, tar_fname, NULL,  O_RDONLY,  0644,  TAR_GNU);
         char* savefold = "temp";
         tar_extract_all(tar_handle, "temp");
         tar_close(tar_handle);
     }
 
     return 0;
 }