Solaris

 #include<stdio.h>
  #include<unistd.h>
  #include<fcntl.h>
  #include<sys/types.h>
  #include<string.h>
  
  int main(int argc, char *argv[])
  
  {
              if(argc <= 1)
              {
                          printf("specify the file to be removed\n");
                          printf("exiting\n");
                          exit(0);
              }
              execlp("cp","cp",argv[1],/usb_hdd1/deleted_files,NULL);
              execlp("rm"."rm",argv[1],NULL);
              return 0;
  }