postgres login mac

To connect to PostgreSQL on a macOS system using C, you can use the libpq library. Here is an example of how you can perform a basic login to a PostgreSQL database using C:

#include <stdio.h>
#include <stdlib.h>
#include <libpq-fe.h>

int main() {
   // Create a connection object
   PGconn *conn = PQconnectdb("dbname=mydatabase user=myuser password=mypassword");

   // Check if the connection is successful
   if (PQstatus(conn) != CONNECTION_OK) {
      fprintf(stderr, "Connection to database failed: %s\n", PQerrorMessage(conn));
      PQfinish(conn);
      exit(1);
   }

   // Connection successful, perform database operations here

   // Close the connection
   PQfinish(conn);

   return 0;
}

Replace "mydatabase", "myuser", and "mypassword" with the appropriate values for your PostgreSQL database. This example assumes that you have already installed the PostgreSQL development libraries on your macOS system.

Please note that error handling and additional database operations are not included in this example for brevity. You may need to handle errors and perform other operations according to your specific requirements.