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/*-------------------------------------------------------------------------
*
* dropdb
*
* Portions Copyright (c) 1996-2022, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* src/bin/scripts/dropdb.c
*
*-------------------------------------------------------------------------
*/
#include "postgres_fe.h"
#include "common.h"
#include "common/logging.h"
#include "fe_utils/option_utils.h"
#include "fe_utils/string_utils.h"
static void help(const char *progname);
int
main(int argc, char *argv[])
{
static int if_exists = 0;
static struct option long_options[] = {
{"host", required_argument, NULL, 'h'},
{"port", required_argument, NULL, 'p'},
{"username", required_argument, NULL, 'U'},
{"no-password", no_argument, NULL, 'w'},
{"password", no_argument, NULL, 'W'},
{"echo", no_argument, NULL, 'e'},
{"interactive", no_argument, NULL, 'i'},
{"if-exists", no_argument, &if_exists, 1},
{"maintenance-db", required_argument, NULL, 2},
{"force", no_argument, NULL, 'f'},
{NULL, 0, NULL, 0}
};
const char *progname;
int optindex;
int c;
char *dbname = NULL;
char *maintenance_db = NULL;
char *host = NULL;
char *port = NULL;
char *username = NULL;
enum trivalue prompt_password = TRI_DEFAULT;
ConnParams cparams;
bool echo = false;
bool interactive = false;
bool force = false;
PQExpBufferData sql;
PGconn *conn;
PGresult *result;
pg_logging_init(argv[0]);
progname = get_progname(argv[0]);
set_pglocale_pgservice(argv[0], PG_TEXTDOMAIN("pgscripts"));
handle_help_version_opts(argc, argv, "dropdb", help);
while ((c = getopt_long(argc, argv, "h:p:U:wWeif", long_options, &optindex)) != -1)
{
switch (c)
{
case 'h':
host = pg_strdup(optarg);
break;
case 'p':
port = pg_strdup(optarg);
break;
case 'U':
username = pg_strdup(optarg);
break;
case 'w':
prompt_password = TRI_NO;
break;
case 'W':
prompt_password = TRI_YES;
break;
case 'e':
echo = true;
break;
case 'i':
interactive = true;
break;
case 'f':
force = true;
break;
case 0:
/* this covers the long options */
break;
case 2:
maintenance_db = pg_strdup(optarg);
break;
default:
/* getopt_long already emitted a complaint */
pg_log_error_hint("Try \"%s --help\" for more information.", progname);
exit(1);
}
}
switch (argc - optind)
{
case 0:
pg_log_error("missing required argument database name");
pg_log_error_hint("Try \"%s --help\" for more information.", progname);
exit(1);
case 1:
dbname = argv[optind];
break;
default:
pg_log_error("too many command-line arguments (first is \"%s\")",
argv[optind + 1]);
pg_log_error_hint("Try \"%s --help\" for more information.", progname);
exit(1);
}
if (interactive)
{
printf(_("Database \"%s\" will be permanently removed.\n"), dbname);
if (!yesno_prompt("Are you sure?"))
exit(0);
}
initPQExpBuffer(&sql);
appendPQExpBuffer(&sql, "DROP DATABASE %s%s%s;",
(if_exists ? "IF EXISTS " : ""),
fmtId(dbname),
force ? " WITH (FORCE)" : "");
/* Avoid trying to drop postgres db while we are connected to it. */
if (maintenance_db == NULL && strcmp(dbname, "postgres") == 0)
maintenance_db = "template1";
cparams.dbname = maintenance_db;
cparams.pghost = host;
cparams.pgport = port;
cparams.pguser = username;
cparams.prompt_password = prompt_password;
cparams.override_dbname = NULL;
conn = connectMaintenanceDatabase(&cparams, progname, echo);
if (echo)
printf("%s\n", sql.data);
result = PQexec(conn, sql.data);
if (PQresultStatus(result) != PGRES_COMMAND_OK)
{
pg_log_error("database removal failed: %s", PQerrorMessage(conn));
PQfinish(conn);
exit(1);
}
PQclear(result);
PQfinish(conn);
exit(0);
}
static void
help(const char *progname)
{
printf(_("%s removes a PostgreSQL database.\n\n"), progname);
printf(_("Usage:\n"));
printf(_(" %s [OPTION]... DBNAME\n"), progname);
printf(_("\nOptions:\n"));
printf(_(" -e, --echo show the commands being sent to the server\n"));
printf(_(" -f, --force try to terminate other connections before dropping\n"));
printf(_(" -i, --interactive prompt before deleting anything\n"));
printf(_(" -V, --version output version information, then exit\n"));
printf(_(" --if-exists don't report error if database doesn't exist\n"));
printf(_(" -?, --help show this help, then exit\n"));
printf(_("\nConnection options:\n"));
printf(_(" -h, --host=HOSTNAME database server host or socket directory\n"));
printf(_(" -p, --port=PORT database server port\n"));
printf(_(" -U, --username=USERNAME user name to connect as\n"));
printf(_(" -w, --no-password never prompt for password\n"));
printf(_(" -W, --password force password prompt\n"));
printf(_(" --maintenance-db=DBNAME alternate maintenance database\n"));
printf(_("\nReport bugs to <%s>.\n"), PACKAGE_BUGREPORT);
printf(_("%s home page: <%s>\n"), PACKAGE_NAME, PACKAGE_URL);
}
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