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@pathcl /mysql-api.c
Last active Dec 13, 2016

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What would you like to do?
Simple connector to mysql database
/*
Does a SQL query defined as 'sql'
return 1 if there are no results, else returns 0
In order to compile do this:
$ gcc -O2 mysql-api.c -o mysql-api -std=c99 `mysql_config --cflags --libs`
You'll need libmysqlclient-dev as for my_global.h and mysql.h
*/
#include <my_global.h>
#include <mysql.h>
#define MAX_QUERY 1024
void finish_with_error(MYSQL *con)
{
fprintf(stderr, "%s\n", mysql_error(con));
mysql_close(con);
exit(1);
}
int main(int argc, char *argv[])
{
MYSQL *con = mysql_init(NULL);
char *user = argv[1];
char *passwd = argv[2];
char sql[MAX_QUERY];
snprintf(sql, MAX_QUERY, "SELECT * FROM table where user = '%s' and passwd = '%s'", user, passwd);
if (con == NULL)
{
fprintf(stderr, "mysql_init() failed\n");
exit(1);
}
if (mysql_real_connect(con, "host", "user", "passwd",
"dbname", 0, NULL, 0) == NULL)
{
finish_with_error(con);
}
if (mysql_query(con, sql))
{
finish_with_error(con);
}
MYSQL_RES *result = mysql_store_result(con);
if (result == NULL)
{
finish_with_error(con);
}
if (mysql_num_rows(result) == 0) {
finish_with_error(con);
}
mysql_free_result(result);
mysql_close(con);
exit(0);
}
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