MySql from C on Ubuntu - mysql

Question

I can use mysql from terminal to query data and I try to connect to mysql server with C but here is some problem i don't know to fix but seems like version conflict.
#include <my_global.h>
#include <mysql.h>
int main(int argc, char **argv)
{
MYSQL *conn;
conn = mysql_init(NULL);
if (conn == NULL) {
printf("Error %u: %s\n", mysql_errno(conn), mysql_error(conn));
exit(1);
}
// upper code works
// following don't work...
if (mysql_real_connect(conn, "localhost", "username", "password", NULL, 0, NULL, 0) == NULL)
{
printf("Error %u: %s\n", mysql_errno(conn), mysql_error(conn));
exit(1);
}
etc...
When I start this code message "Error 2002: Can't connect to local MySQL server through socket '/tmp/mysql.sock' (2)" appears.
Problem is that I don't have mysql.sock anywhere in computer but have /var/run/mysqld/mysqld.sock.
In linker options I added /var/lib/libmysql.so and program compiles OK.
Is here any simple way to get this to work?

Answer 1

why not connecting directly to the socket?
mysql_real_connect(conn, "localhost", "username", "password",
NULL, 0, "/var/run/mysqld/mysqld.sock", 0)
I have no environment to test it right now, but I think it should work
To answer question in your comment:
I think its' because of your configuration, mysql's default configuration is to store socket at /tmp/mysql.sock, and it didn't find it there, you just specified your location of the socket, this is not a portable solution, it depends on purpose of your application