Age Owner TLA Line data Source code
1 : /*-------------------------------------------------------------------------
2 : *
3 : * dropdb
4 : *
5 : * Portions Copyright (c) 1996-2023, PostgreSQL Global Development Group
6 : * Portions Copyright (c) 1994, Regents of the University of California
7 : *
8 : * src/bin/scripts/dropdb.c
9 : *
10 : *-------------------------------------------------------------------------
11 : */
12 :
13 : #include "postgres_fe.h"
14 : #include "common.h"
15 : #include "common/logging.h"
16 : #include "fe_utils/option_utils.h"
17 : #include "fe_utils/string_utils.h"
18 :
19 :
20 : static void help(const char *progname);
21 :
22 :
23 : int
7327 peter_e 24 CBC 9 : main(int argc, char *argv[])
25 : {
26 : static int if_exists = 0;
27 :
28 : static struct option long_options[] = {
29 : {"host", required_argument, NULL, 'h'},
30 : {"port", required_argument, NULL, 'p'},
31 : {"username", required_argument, NULL, 'U'},
32 : {"no-password", no_argument, NULL, 'w'},
33 : {"password", no_argument, NULL, 'W'},
34 : {"echo", no_argument, NULL, 'e'},
35 : {"interactive", no_argument, NULL, 'i'},
36 : {"if-exists", no_argument, &if_exists, 1},
37 : {"maintenance-db", required_argument, NULL, 2},
38 : {"force", no_argument, NULL, 'f'},
39 : {NULL, 0, NULL, 0}
40 : };
41 :
42 : const char *progname;
43 : int optindex;
44 : int c;
45 :
46 9 : char *dbname = NULL;
4142 rhaas 47 9 : char *maintenance_db = NULL;
7327 peter_e 48 9 : char *host = NULL;
49 9 : char *port = NULL;
50 9 : char *username = NULL;
5155 51 9 : enum trivalue prompt_password = TRI_DEFAULT;
52 : ConnParams cparams;
7327 53 9 : bool echo = false;
54 9 : bool interactive = false;
1238 akapila 55 9 : bool force = false;
56 :
57 : PQExpBufferData sql;
58 :
59 : PGconn *conn;
60 : PGresult *result;
61 :
1469 peter 62 9 : pg_logging_init(argv[0]);
7327 peter_e 63 9 : progname = get_progname(argv[0]);
5232 64 9 : set_pglocale_pgservice(argv[0], PG_TEXTDOMAIN("pgscripts"));
65 :
7327 66 9 : handle_help_version_opts(argc, argv, "dropdb", help);
67 :
118 peter 68 GNC 11 : while ((c = getopt_long(argc, argv, "efh:ip:U:wW", long_options, &optindex)) != -1)
69 : {
7327 peter_e 70 CBC 5 : switch (c)
71 : {
118 peter 72 UNC 0 : case 'e':
73 0 : echo = true;
74 0 : break;
118 peter 75 GNC 1 : case 'f':
76 1 : force = true;
77 1 : break;
7327 peter_e 78 UBC 0 : case 'h':
3831 bruce 79 0 : host = pg_strdup(optarg);
7327 peter_e 80 0 : break;
118 peter 81 UNC 0 : case 'i':
82 0 : interactive = true;
83 0 : break;
7327 peter_e 84 LBC 0 : case 'p':
3831 bruce 85 0 : port = pg_strdup(optarg);
7327 peter_e 86 0 : break;
7327 peter_e 87 GBC 3 : case 'U':
3831 bruce 88 3 : username = pg_strdup(optarg);
7327 peter_e 89 3 : break;
5155 peter_e 90 UBC 0 : case 'w':
91 0 : prompt_password = TRI_NO;
92 0 : break;
7327 93 0 : case 'W':
5155 94 0 : prompt_password = TRI_YES;
7327 95 0 : break;
4240 rhaas 96 0 : case 0:
97 : /* this covers the long options */
98 0 : break;
4142 99 0 : case 2:
3831 bruce 100 0 : maintenance_db = pg_strdup(optarg);
4142 rhaas 101 0 : break;
7327 peter_e 102 CBC 1 : default:
103 : /* getopt_long already emitted a complaint */
366 tgl 104 1 : pg_log_error_hint("Try \"%s --help\" for more information.", progname);
7327 peter_e 105 1 : exit(1);
106 : }
107 : }
108 :
109 6 : switch (argc - optind)
110 : {
7327 peter_e 111 UBC 0 : case 0:
1469 peter 112 0 : pg_log_error("missing required argument database name");
366 tgl 113 0 : pg_log_error_hint("Try \"%s --help\" for more information.", progname);
7327 peter_e 114 0 : exit(1);
7327 peter_e 115 CBC 6 : case 1:
116 6 : dbname = argv[optind];
117 6 : break;
7327 peter_e 118 UBC 0 : default:
1469 peter 119 0 : pg_log_error("too many command-line arguments (first is \"%s\")",
120 : argv[optind + 1]);
366 tgl 121 0 : pg_log_error_hint("Try \"%s --help\" for more information.", progname);
7327 peter_e 122 0 : exit(1);
123 : }
124 :
7327 peter_e 125 CBC 6 : if (interactive)
126 : {
7200 peter_e 127 UBC 0 : printf(_("Database \"%s\" will be permanently removed.\n"), dbname);
6043 128 0 : if (!yesno_prompt("Are you sure?"))
7327 129 0 : exit(0);
130 : }
131 :
7327 peter_e 132 CBC 6 : initPQExpBuffer(&sql);
133 :
1238 akapila 134 12 : appendPQExpBuffer(&sql, "DROP DATABASE %s%s%s;",
135 6 : (if_exists ? "IF EXISTS " : ""),
136 : fmtId(dbname),
137 : force ? " WITH (FORCE)" : "");
138 :
139 : /* Avoid trying to drop postgres db while we are connected to it. */
4142 rhaas 140 6 : if (maintenance_db == NULL && strcmp(dbname, "postgres") == 0)
4142 rhaas 141 UBC 0 : maintenance_db = "template1";
142 :
902 tgl 143 CBC 6 : cparams.dbname = maintenance_db;
144 6 : cparams.pghost = host;
145 6 : cparams.pgport = port;
146 6 : cparams.pguser = username;
147 6 : cparams.prompt_password = prompt_password;
148 6 : cparams.override_dbname = NULL;
149 :
150 6 : conn = connectMaintenanceDatabase(&cparams, progname, echo);
151 :
7327 peter_e 152 6 : if (echo)
3345 peter_e 153 UBC 0 : printf("%s\n", sql.data);
7327 peter_e 154 CBC 6 : result = PQexec(conn, sql.data);
155 6 : if (PQresultStatus(result) != PGRES_COMMAND_OK)
156 : {
1469 peter 157 1 : pg_log_error("database removal failed: %s", PQerrorMessage(conn));
7327 peter_e 158 1 : PQfinish(conn);
159 1 : exit(1);
160 : }
161 :
6159 bruce 162 5 : PQclear(result);
7327 peter_e 163 5 : PQfinish(conn);
164 5 : exit(0);
165 : }
166 :
167 :
168 : static void
169 1 : help(const char *progname)
170 : {
171 1 : printf(_("%s removes a PostgreSQL database.\n\n"), progname);
172 1 : printf(_("Usage:\n"));
173 1 : printf(_(" %s [OPTION]... DBNAME\n"), progname);
174 1 : printf(_("\nOptions:\n"));
175 1 : printf(_(" -e, --echo show the commands being sent to the server\n"));
1238 akapila 176 1 : printf(_(" -f, --force try to terminate other connections before dropping\n"));
1073 peter 177 1 : printf(_(" -i, --interactive prompt before deleting anything\n"));
3947 peter_e 178 1 : printf(_(" -V, --version output version information, then exit\n"));
4240 rhaas 179 1 : printf(_(" --if-exists don't report error if database doesn't exist\n"));
3947 peter_e 180 1 : printf(_(" -?, --help show this help, then exit\n"));
5156 181 1 : printf(_("\nConnection options:\n"));
7242 bruce 182 1 : printf(_(" -h, --host=HOSTNAME database server host or socket directory\n"));
7327 peter_e 183 1 : printf(_(" -p, --port=PORT database server port\n"));
184 1 : printf(_(" -U, --username=USERNAME user name to connect as\n"));
5155 185 1 : printf(_(" -w, --no-password never prompt for password\n"));
5598 tgl 186 1 : printf(_(" -W, --password force password prompt\n"));
4142 rhaas 187 1 : printf(_(" --maintenance-db=DBNAME alternate maintenance database\n"));
1136 peter 188 1 : printf(_("\nReport bugs to <%s>.\n"), PACKAGE_BUGREPORT);
189 1 : printf(_("%s home page: <%s>\n"), PACKAGE_NAME, PACKAGE_URL);
7327 peter_e 190 1 : }
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