1 /*-------------------------------------------------------------------------
2 *
3 * dropdb
4 *
5 * Portions Copyright (c) 1996-2016, 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 "fe_utils/string_utils.h"
16
17
18 static void help(const char *progname);
19
20
21 int
main(int argc,char * argv[])22 main(int argc, char *argv[])
23 {
24 static int if_exists = 0;
25
26 static struct option long_options[] = {
27 {"host", required_argument, NULL, 'h'},
28 {"port", required_argument, NULL, 'p'},
29 {"username", required_argument, NULL, 'U'},
30 {"no-password", no_argument, NULL, 'w'},
31 {"password", no_argument, NULL, 'W'},
32 {"echo", no_argument, NULL, 'e'},
33 {"interactive", no_argument, NULL, 'i'},
34 {"if-exists", no_argument, &if_exists, 1},
35 {"maintenance-db", required_argument, NULL, 2},
36 {NULL, 0, NULL, 0}
37 };
38
39 const char *progname;
40 int optindex;
41 int c;
42
43 char *dbname = NULL;
44 char *maintenance_db = NULL;
45 char *host = NULL;
46 char *port = NULL;
47 char *username = NULL;
48 enum trivalue prompt_password = TRI_DEFAULT;
49 ConnParams cparams;
50 bool echo = false;
51 bool interactive = false;
52
53 PQExpBufferData sql;
54
55 PGconn *conn;
56 PGresult *result;
57
58 progname = get_progname(argv[0]);
59 set_pglocale_pgservice(argv[0], PG_TEXTDOMAIN("pgscripts"));
60
61 handle_help_version_opts(argc, argv, "dropdb", help);
62
63 while ((c = getopt_long(argc, argv, "h:p:U:wWei", long_options, &optindex)) != -1)
64 {
65 switch (c)
66 {
67 case 'h':
68 host = pg_strdup(optarg);
69 break;
70 case 'p':
71 port = pg_strdup(optarg);
72 break;
73 case 'U':
74 username = pg_strdup(optarg);
75 break;
76 case 'w':
77 prompt_password = TRI_NO;
78 break;
79 case 'W':
80 prompt_password = TRI_YES;
81 break;
82 case 'e':
83 echo = true;
84 break;
85 case 'i':
86 interactive = true;
87 break;
88 case 0:
89 /* this covers the long options */
90 break;
91 case 2:
92 maintenance_db = pg_strdup(optarg);
93 break;
94 default:
95 fprintf(stderr, _("Try \"%s --help\" for more information.\n"), progname);
96 exit(1);
97 }
98 }
99
100 switch (argc - optind)
101 {
102 case 0:
103 fprintf(stderr, _("%s: missing required argument database name\n"), progname);
104 fprintf(stderr, _("Try \"%s --help\" for more information.\n"), progname);
105 exit(1);
106 case 1:
107 dbname = argv[optind];
108 break;
109 default:
110 fprintf(stderr, _("%s: too many command-line arguments (first is \"%s\")\n"),
111 progname, argv[optind + 1]);
112 fprintf(stderr, _("Try \"%s --help\" for more information.\n"), progname);
113 exit(1);
114 }
115
116 if (interactive)
117 {
118 printf(_("Database \"%s\" will be permanently removed.\n"), dbname);
119 if (!yesno_prompt("Are you sure?"))
120 exit(0);
121 }
122
123 initPQExpBuffer(&sql);
124
125 appendPQExpBuffer(&sql, "DROP DATABASE %s%s;",
126 (if_exists ? "IF EXISTS " : ""), fmtId(dbname));
127
128 /* Avoid trying to drop postgres db while we are connected to it. */
129 if (maintenance_db == NULL && strcmp(dbname, "postgres") == 0)
130 maintenance_db = "template1";
131
132 cparams.dbname = maintenance_db;
133 cparams.pghost = host;
134 cparams.pgport = port;
135 cparams.pguser = username;
136 cparams.prompt_password = prompt_password;
137 cparams.override_dbname = NULL;
138
139 conn = connectMaintenanceDatabase(&cparams, progname, echo);
140
141 if (echo)
142 printf("%s\n", sql.data);
143 result = PQexec(conn, sql.data);
144 if (PQresultStatus(result) != PGRES_COMMAND_OK)
145 {
146 fprintf(stderr, _("%s: database removal failed: %s"),
147 progname, PQerrorMessage(conn));
148 PQfinish(conn);
149 exit(1);
150 }
151
152 PQclear(result);
153 PQfinish(conn);
154 exit(0);
155 }
156
157
158 static void
help(const char * progname)159 help(const char *progname)
160 {
161 printf(_("%s removes a PostgreSQL database.\n\n"), progname);
162 printf(_("Usage:\n"));
163 printf(_(" %s [OPTION]... DBNAME\n"), progname);
164 printf(_("\nOptions:\n"));
165 printf(_(" -e, --echo show the commands being sent to the server\n"));
166 printf(_(" -i, --interactive prompt before deleting anything\n"));
167 printf(_(" -V, --version output version information, then exit\n"));
168 printf(_(" --if-exists don't report error if database doesn't exist\n"));
169 printf(_(" -?, --help show this help, then exit\n"));
170 printf(_("\nConnection options:\n"));
171 printf(_(" -h, --host=HOSTNAME database server host or socket directory\n"));
172 printf(_(" -p, --port=PORT database server port\n"));
173 printf(_(" -U, --username=USERNAME user name to connect as\n"));
174 printf(_(" -w, --no-password never prompt for password\n"));
175 printf(_(" -W, --password force password prompt\n"));
176 printf(_(" --maintenance-db=DBNAME alternate maintenance database\n"));
177 printf(_("\nReport bugs to <pgsql-bugs@postgresql.org>.\n"));
178 }
179