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161 lines
3.5 KiB
C
161 lines
3.5 KiB
C
/*
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* PostgreSQL plugin.
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* $Id$
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*/
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#define IN_PLUGIN
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#include "../../echoping.h"
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#ifdef POSTGRESQL_PREFIX
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#include <postgresql/libpq-fe.h>
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#else
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#include <libpq-fe.h>
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#endif
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const char *request = NULL;
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int readall = FALSE;
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int connect_each_time = FALSE;
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poptContext postgresql_poptcon;
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PGconn *conn;
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PGresult *res;
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char *conninfo;
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echoping_options global_options;
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void
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postgresql_usage (const char *msg)
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{
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if (msg)
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{
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printf ("PostgreSQL plugin error: %s\n", msg);
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}
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poptPrintUsage (postgresql_poptcon, stdout, 0);
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fprintf (stderr, " [SQL-request]\n");
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exit (1);
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}
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char *
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init (const int argc, const char **argv,
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const echoping_options global_external_options)
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{
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int value;
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char *msg = malloc (256);
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char *rest;
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/* popt variables */
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struct poptOption options[] = {
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{"conninfo", 'c', POPT_ARG_STRING, &conninfo, 0,
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"Connection information for the Postgresql server. Something like 'host=foo dbname=bar''",
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""},
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{"readall", 'a', POPT_ARG_NONE, &readall, 0,
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"Read all the data sent by the Postgresql server",
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""},
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{"connect-each-time", 'e', POPT_ARG_NONE, &connect_each_time, 0,
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"(Re)Connect to the Postgresql server at each iteration",
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""},
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POPT_AUTOHELP POPT_TABLEEND
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};
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global_options = global_external_options;
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if (global_options.udp)
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err_quit ("UDP makes no sense for a PostgreSQL connection");
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postgresql_poptcon = poptGetContext (NULL, argc,
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argv, options,
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POPT_CONTEXT_POSIXMEHARDER);
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while ((value = poptGetNextOpt (postgresql_poptcon)) > 0)
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{
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}
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if (value < -1)
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{
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sprintf (msg, "%s: %s",
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poptBadOption (postgresql_poptcon, POPT_BADOPTION_NOALIAS),
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poptStrerror (value));
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postgresql_usage (msg);
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}
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request = poptGetArg (postgresql_poptcon);
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if (request == NULL)
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request = "SELECT now()";
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rest = poptGetArg (postgresql_poptcon);
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if (rest != NULL)
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postgresql_usage ("Erroneous additional arguments");
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if (conninfo == NULL)
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conninfo = "";
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return NULL; /* We only use the conninfo, echoping does not see our hostname or port */
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}
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void
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start_raw ()
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{
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if (!connect_each_time)
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{
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conn = PQconnectdb (conninfo);
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if (conn == NULL)
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{
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err_quit ("Cannot create connection\n");
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}
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if (PQstatus (conn) == CONNECTION_BAD)
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{
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err_quit ("Connection failed: %s\n", PQerrorMessage (conn));
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}
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}
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}
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int
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execute ()
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{
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unsigned int row, column;
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char *result;
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if (connect_each_time)
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{
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conn = PQconnectdb (conninfo);
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if (conn == NULL)
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{
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err_ret ("Cannot create connection\n");
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return -1;
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}
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if (PQstatus (conn) == CONNECTION_BAD)
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{
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err_ret ("Connection failed: %s\n", PQerrorMessage (conn));
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return -1;
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}
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}
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res = PQexec (conn, request);
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if (PQresultStatus (res) != PGRES_TUPLES_OK)
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{
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err_ret ("Cannot run \"%s\": %s\n", request,
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PQresultErrorMessage (res));
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return -1;
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}
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if (global_options.verbose)
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printf ("%d tuples returned\n", PQntuples (res));
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if (readall)
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{
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for (row = 0; row < PQntuples (res); row++)
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{
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for (column = 0; column < PQnfields (res); column++)
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{
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result = PQgetvalue (res, row, column);
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if (result == NULL)
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{
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err_ret ("Cannot retrieve value [%d,%d]\n", row, column);
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return -1;
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}
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/* else {
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printf ("DEBUG: [%d,%d] %s\n", row, column, result);
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} */
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}
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}
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}
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if (connect_each_time)
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PQfinish (conn);
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return 0;
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}
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void
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terminate ()
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{
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if (!connect_each_time)
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PQfinish (conn);
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}
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