182 lines
4.8 KiB
C
182 lines
4.8 KiB
C
/*-------------------------------------------------------------------------
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*
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* dropdb
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*
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* Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* src/bin/scripts/dropdb.c
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*
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*-------------------------------------------------------------------------
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*/
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#include "postgres_fe.h"
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#include "common.h"
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#include "common/logging.h"
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#include "fe_utils/string_utils.h"
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static void help(const char *progname);
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int
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main(int argc, char *argv[])
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{
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static int if_exists = 0;
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static struct option long_options[] = {
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{"host", required_argument, NULL, 'h'},
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{"port", required_argument, NULL, 'p'},
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{"username", required_argument, NULL, 'U'},
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{"no-password", no_argument, NULL, 'w'},
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{"password", no_argument, NULL, 'W'},
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{"echo", no_argument, NULL, 'e'},
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{"interactive", no_argument, NULL, 'i'},
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{"if-exists", no_argument, &if_exists, 1},
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{"maintenance-db", required_argument, NULL, 2},
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{"force", no_argument, NULL, 'f'},
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{NULL, 0, NULL, 0}
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};
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const char *progname;
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int optindex;
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int c;
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char *dbname = NULL;
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char *maintenance_db = NULL;
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char *host = NULL;
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char *port = NULL;
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char *username = NULL;
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enum trivalue prompt_password = TRI_DEFAULT;
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bool echo = false;
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bool interactive = false;
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bool force = false;
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PQExpBufferData sql;
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PGconn *conn;
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PGresult *result;
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pg_logging_init(argv[0]);
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progname = get_progname(argv[0]);
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set_pglocale_pgservice(argv[0], PG_TEXTDOMAIN("pgscripts"));
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handle_help_version_opts(argc, argv, "dropdb", help);
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while ((c = getopt_long(argc, argv, "h:p:U:wWeif", long_options, &optindex)) != -1)
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{
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switch (c)
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{
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case 'h':
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host = pg_strdup(optarg);
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break;
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case 'p':
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port = pg_strdup(optarg);
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break;
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case 'U':
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username = pg_strdup(optarg);
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break;
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case 'w':
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prompt_password = TRI_NO;
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break;
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case 'W':
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prompt_password = TRI_YES;
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break;
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case 'e':
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echo = true;
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break;
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case 'i':
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interactive = true;
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break;
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case 'f':
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force = true;
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break;
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case 0:
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/* this covers the long options */
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break;
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case 2:
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maintenance_db = pg_strdup(optarg);
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break;
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default:
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fprintf(stderr, _("Try \"%s --help\" for more information.\n"), progname);
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exit(1);
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}
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}
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switch (argc - optind)
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{
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case 0:
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pg_log_error("missing required argument database name");
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fprintf(stderr, _("Try \"%s --help\" for more information.\n"), progname);
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exit(1);
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case 1:
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dbname = argv[optind];
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break;
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default:
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pg_log_error("too many command-line arguments (first is \"%s\")",
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argv[optind + 1]);
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fprintf(stderr, _("Try \"%s --help\" for more information.\n"), progname);
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exit(1);
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}
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if (interactive)
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{
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printf(_("Database \"%s\" will be permanently removed.\n"), dbname);
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if (!yesno_prompt("Are you sure?"))
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exit(0);
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}
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initPQExpBuffer(&sql);
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appendPQExpBuffer(&sql, "DROP DATABASE %s%s%s;",
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(if_exists ? "IF EXISTS " : ""),
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fmtId(dbname),
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force ? " WITH (FORCE)" : "");
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/* Avoid trying to drop postgres db while we are connected to it. */
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if (maintenance_db == NULL && strcmp(dbname, "postgres") == 0)
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maintenance_db = "template1";
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conn = connectMaintenanceDatabase(maintenance_db,
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host, port, username, prompt_password,
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progname, echo);
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if (echo)
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printf("%s\n", sql.data);
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result = PQexec(conn, sql.data);
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if (PQresultStatus(result) != PGRES_COMMAND_OK)
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{
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pg_log_error("database removal failed: %s", PQerrorMessage(conn));
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PQfinish(conn);
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exit(1);
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}
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PQclear(result);
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PQfinish(conn);
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exit(0);
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}
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static void
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help(const char *progname)
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{
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printf(_("%s removes a PostgreSQL database.\n\n"), progname);
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printf(_("Usage:\n"));
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printf(_(" %s [OPTION]... DBNAME\n"), progname);
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printf(_("\nOptions:\n"));
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printf(_(" -e, --echo show the commands being sent to the server\n"));
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printf(_(" -i, --interactive prompt before deleting anything\n"));
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printf(_(" -f, --force try to terminate other connections before dropping\n"));
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printf(_(" -V, --version output version information, then exit\n"));
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printf(_(" --if-exists don't report error if database doesn't exist\n"));
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printf(_(" -?, --help show this help, then exit\n"));
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printf(_("\nConnection options:\n"));
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printf(_(" -h, --host=HOSTNAME database server host or socket directory\n"));
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printf(_(" -p, --port=PORT database server port\n"));
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printf(_(" -U, --username=USERNAME user name to connect as\n"));
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printf(_(" -w, --no-password never prompt for password\n"));
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printf(_(" -W, --password force password prompt\n"));
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printf(_(" --maintenance-db=DBNAME alternate maintenance database\n"));
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printf(_("\nReport bugs to <%s>.\n"), PACKAGE_BUGREPORT);
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}
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