int main(int argc, char **argv) { char *in_filename, *out_filename, *out_filename2; char *database; Oid lobjOid; PGconn *conn; PGresult *res; if (argc != 5) { fprintf(stderr, "Usage: %s database_name in_filename out_filename out_filename2\n", argv[0]); exit(1); } database = argv[1]; in_filename = argv[2]; out_filename = argv[3]; out_filename2 = argv[4]; /* * set up the connection */ conn = PQsetdb(NULL, NULL, NULL, NULL, database); /* check to see that the backend connection was successfully made */ if (PQstatus(conn) != CONNECTION_OK) { fprintf(stderr, "Connection to database failed: %s", PQerrorMessage(conn)); exit_nicely(conn); } res = PQexec(conn, "begin"); PQclear(res); printf("importing file \"%s\" ...\n", in_filename); /* lobjOid = importFile(conn, in_filename); */ lobjOid = lo_import(conn, in_filename); if (lobjOid == 0) fprintf(stderr, "%s\n", PQerrorMessage(conn)); else { printf("\tas large object %u.\n", lobjOid); printf("picking out bytes 4294967000-4294968000 of the large object\n"); pickout(conn, lobjOid, 4294967000U, 1000); printf("overwriting bytes 4294967000-4294968000 of the large object with X's\n"); overwrite(conn, lobjOid, 4294967000U, 1000); printf("exporting large object to file \"%s\" ...\n", out_filename); /* exportFile(conn, lobjOid, out_filename); */ if (lo_export(conn, lobjOid, out_filename) < 0) fprintf(stderr, "%s\n", PQerrorMessage(conn)); printf("truncating to 3294968000 bytes\n"); my_truncate(conn, lobjOid, 3294968000U); printf("exporting truncated large object to file \"%s\" ...\n", out_filename2); if (lo_export(conn, lobjOid, out_filename2) < 0) fprintf(stderr, "%s\n", PQerrorMessage(conn)); } res = PQexec(conn, "end"); PQclear(res); PQfinish(conn); return 0; }
int main(int argc, char **argv) { char *in_filename, *out_filename; char *database; Oid lobjOid; PGconn *conn; PGresult *res; if (argc != 4) { fprintf(stderr, "Usage: %s database_name in_filename out_filename\n", argv[0]); exit(1); } database = argv[1]; in_filename = argv[2]; out_filename = argv[3]; /* * set up the connection */ conn = PQsetdb(NULL, NULL, NULL, NULL, database); /* check to see that the backend connection was successfully made */ if (PQstatus(conn) != CONNECTION_OK) { fprintf(stderr, "Connection to database failed: %s", PQerrorMessage(conn)); exit_nicely(conn); } /* Set always-secure search path, so malicous users can't take control. */ res = PQexec(conn, "SELECT pg_catalog.set_config('search_path', '', false)"); if (PQresultStatus(res) != PGRES_TUPLES_OK) { fprintf(stderr, "SET failed: %s", PQerrorMessage(conn)); PQclear(res); exit_nicely(conn); } PQclear(res); res = PQexec(conn, "begin"); PQclear(res); printf("importing file \"%s\" ...\n", in_filename); /* lobjOid = importFile(conn, in_filename); */ lobjOid = lo_import(conn, in_filename); if (lobjOid == 0) fprintf(stderr, "%s\n", PQerrorMessage(conn)); else { printf("\tas large object %u.\n", lobjOid); printf("picking out bytes 1000-2000 of the large object\n"); pickout(conn, lobjOid, 1000, 1000); printf("overwriting bytes 1000-2000 of the large object with X's\n"); overwrite(conn, lobjOid, 1000, 1000); printf("exporting large object to file \"%s\" ...\n", out_filename); /* exportFile(conn, lobjOid, out_filename); */ if (lo_export(conn, lobjOid, out_filename) < 0) fprintf(stderr, "%s\n", PQerrorMessage(conn)); } res = PQexec(conn, "end"); PQclear(res); PQfinish(conn); return 0; }