114 lines
2.5 KiB
C
114 lines
2.5 KiB
C
#include "postgres.h"
|
|
#include <libpq-fe.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <strings.h>
|
|
#include <sys/types.h>
|
|
#include <unistd.h>
|
|
#ifdef POSTGRES
|
|
|
|
static PGconn *conn;
|
|
|
|
int pg_connect(char *args) {
|
|
if (args == NULL) {
|
|
fprintf(stderr, "pg connect: need dbname\n");
|
|
return 1;
|
|
}
|
|
conn = PQsetdbLogin("localhost", "5432", NULL, NULL, args, "postgres", NULL);
|
|
if (PQstatus(conn) == CONNECTION_BAD) {
|
|
fprintf(stderr, "pg connect: Connection to database failed: %s",
|
|
PQerrorMessage(conn));
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
int pg_list() {
|
|
if (conn == NULL) {
|
|
fprintf(stderr, "pg list: not connected to database\n");
|
|
return 1;
|
|
}
|
|
PGresult *res =
|
|
PQexec(conn, "SELECT table_name FROM information_schema.tables WHERE "
|
|
"table_schema = 'public'");
|
|
if (PQresultStatus(res) != PGRES_TUPLES_OK) {
|
|
fprintf(stderr, "pg list: No data retrieved\n");
|
|
PQclear(res);
|
|
return 1;
|
|
}
|
|
int rows = PQntuples(res);
|
|
for (int i = 0; i < rows; i++) {
|
|
if (i != 0)
|
|
printf(", ");
|
|
printf("%s ", PQgetvalue(res, i, 0));
|
|
}
|
|
printf("\n");
|
|
return 0;
|
|
}
|
|
|
|
int pg_show(char *args) {
|
|
if (conn == NULL) {
|
|
fprintf(stderr, "pg show: not connected to database\n");
|
|
return 1;
|
|
}
|
|
if (args == NULL) {
|
|
fprintf(stderr, "pg show: need table name\n");
|
|
return 1;
|
|
}
|
|
char *query = malloc(100);
|
|
sprintf(query, "SELECT * FROM %s", args);
|
|
PGresult *res = PQexec(conn, query);
|
|
if (PQresultStatus(res) != PGRES_TUPLES_OK) {
|
|
fprintf(stderr, "pg show: No data retrieved\n");
|
|
PQclear(res);
|
|
return 1;
|
|
}
|
|
int rows = PQntuples(res);
|
|
int cols = PQnfields(res);
|
|
|
|
//print header
|
|
for (int i = 0; i < cols; i++) {
|
|
if (i != 0)
|
|
printf(", ");
|
|
printf("%s ", PQfname(res, i));
|
|
}
|
|
printf("\n");
|
|
//print whole table
|
|
for (int i = 0; i < rows; i++) {
|
|
for (int j = 0; j < cols; j++) {
|
|
if (j != 0)
|
|
printf(", ");
|
|
printf("%s ", PQgetvalue(res, i, j));
|
|
}
|
|
printf("\n");
|
|
}
|
|
|
|
|
|
printf("\n");
|
|
free(query);
|
|
return 0;
|
|
}
|
|
|
|
int dish_pg(char **args) {
|
|
if (args[1] == NULL) {
|
|
fprintf(stderr, "pg: need arguments\n\
|
|
possible arguments:\n\
|
|
connect: connect to database\n\
|
|
list: list all tables\n\
|
|
show: show all contents of a table\n");
|
|
return 1;
|
|
}
|
|
if (strcmp(args[1], "connect") == 0) {
|
|
pg_connect(args[2]);
|
|
}
|
|
if (strcmp(args[1], "list") == 0) {
|
|
pg_list();
|
|
}
|
|
if (strcmp(args[1], "show") == 0) {
|
|
pg_show(args[2]);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
#endif |