int test = sprintf(msg, "%s%s%s%s%s%s%s", msg1,f,msg2,mode,msg3,path,msg4);
exit_trouble(test < 0, __func__, "sprintf");
FILE * file_p = fopen(path, mode);
int test = sprintf(msg, "%s%s%s%s%s%s%s", msg1,f,msg2,mode,msg3,path,msg4);
exit_trouble(test < 0, __func__, "sprintf");
FILE * file_p = fopen(path, mode);