diff options
Diffstat (limited to 'src/bin/scripts/dropdb.c')
| -rw-r--r-- | src/bin/scripts/dropdb.c | 189 |
1 files changed, 189 insertions, 0 deletions
diff --git a/src/bin/scripts/dropdb.c b/src/bin/scripts/dropdb.c new file mode 100644 index 0000000..b154ed1 --- /dev/null +++ b/src/bin/scripts/dropdb.c @@ -0,0 +1,189 @@ +/*------------------------------------------------------------------------- + * + * dropdb + * + * Portions Copyright (c) 1996-2021, 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: + fprintf(stderr, _("Try \"%s --help\" for more information.\n"), progname); + exit(1); + } + } + + switch (argc - optind) + { + case 0: + pg_log_error("missing required argument database name"); + fprintf(stderr, _("Try \"%s --help\" for more information.\n"), progname); + exit(1); + case 1: + dbname = argv[optind]; + break; + default: + pg_log_error("too many command-line arguments (first is \"%s\")", + argv[optind + 1]); + fprintf(stderr, _("Try \"%s --help\" for more information.\n"), 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); +} |