Line data Source code
1 : /*-------------------------------------------------------------------------
2 : *
3 : * dropuser
4 : *
5 : * Portions Copyright (c) 1996-2026, PostgreSQL Global Development Group
6 : * Portions Copyright (c) 1994, Regents of the University of California
7 : *
8 : * src/bin/scripts/dropuser.c
9 : *
10 : *-------------------------------------------------------------------------
11 : */
12 :
13 : #include "postgres_fe.h"
14 : #include "common.h"
15 : #include "common/logging.h"
16 : #include "common/string.h"
17 : #include "fe_utils/option_utils.h"
18 : #include "fe_utils/string_utils.h"
19 :
20 :
21 : static void help(const char *progname);
22 :
23 :
24 : int
25 0 : main(int argc, char *argv[])
26 : {
27 : static int if_exists = 0;
28 :
29 : static struct option long_options[] = {
30 : {"host", required_argument, NULL, 'h'},
31 : {"port", required_argument, NULL, 'p'},
32 : {"username", required_argument, NULL, 'U'},
33 : {"no-password", no_argument, NULL, 'w'},
34 : {"password", no_argument, NULL, 'W'},
35 : {"echo", no_argument, NULL, 'e'},
36 : {"interactive", no_argument, NULL, 'i'},
37 : {"if-exists", no_argument, &if_exists, 1},
38 : {NULL, 0, NULL, 0}
39 : };
40 :
41 0 : const char *progname;
42 0 : int optindex;
43 0 : int c;
44 :
45 0 : char *dropuser = NULL;
46 0 : char *host = NULL;
47 0 : char *port = NULL;
48 0 : char *username = NULL;
49 0 : enum trivalue prompt_password = TRI_DEFAULT;
50 0 : ConnParams cparams;
51 0 : bool echo = false;
52 0 : bool interactive = false;
53 :
54 0 : PQExpBufferData sql;
55 :
56 0 : PGconn *conn;
57 0 : PGresult *result;
58 :
59 0 : pg_logging_init(argv[0]);
60 0 : progname = get_progname(argv[0]);
61 0 : set_pglocale_pgservice(argv[0], PG_TEXTDOMAIN("pgscripts"));
62 :
63 0 : handle_help_version_opts(argc, argv, "dropuser", help);
64 :
65 0 : while ((c = getopt_long(argc, argv, "eh:ip:U:wW", long_options, &optindex)) != -1)
66 : {
67 0 : switch (c)
68 : {
69 : case 'e':
70 0 : echo = true;
71 0 : break;
72 : case 'h':
73 0 : host = pg_strdup(optarg);
74 0 : break;
75 : case 'i':
76 0 : interactive = true;
77 0 : break;
78 : case 'p':
79 0 : port = pg_strdup(optarg);
80 0 : break;
81 : case 'U':
82 0 : username = pg_strdup(optarg);
83 0 : break;
84 : case 'w':
85 0 : prompt_password = TRI_NO;
86 0 : break;
87 : case 'W':
88 0 : prompt_password = TRI_YES;
89 0 : break;
90 : case 0:
91 : /* this covers the long options */
92 : break;
93 : default:
94 : /* getopt_long already emitted a complaint */
95 0 : pg_log_error_hint("Try \"%s --help\" for more information.", progname);
96 0 : exit(1);
97 : }
98 : }
99 :
100 0 : switch (argc - optind)
101 : {
102 : case 0:
103 : break;
104 : case 1:
105 0 : dropuser = argv[optind];
106 0 : break;
107 : default:
108 0 : pg_log_error("too many command-line arguments (first is \"%s\")",
109 : argv[optind + 1]);
110 0 : pg_log_error_hint("Try \"%s --help\" for more information.", progname);
111 0 : exit(1);
112 : }
113 :
114 0 : if (dropuser == NULL)
115 : {
116 0 : if (interactive)
117 : {
118 0 : dropuser = simple_prompt("Enter name of role to drop: ", true);
119 0 : }
120 : else
121 : {
122 0 : pg_log_error("missing required argument role name");
123 0 : pg_log_error_hint("Try \"%s --help\" for more information.", progname);
124 0 : exit(1);
125 : }
126 0 : }
127 :
128 0 : if (interactive)
129 : {
130 0 : printf(_("Role \"%s\" will be permanently removed.\n"), dropuser);
131 0 : if (!yesno_prompt("Are you sure?"))
132 0 : exit(0);
133 0 : }
134 :
135 0 : cparams.dbname = NULL; /* this program lacks any dbname option... */
136 0 : cparams.pghost = host;
137 0 : cparams.pgport = port;
138 0 : cparams.pguser = username;
139 0 : cparams.prompt_password = prompt_password;
140 0 : cparams.override_dbname = NULL;
141 :
142 0 : conn = connectMaintenanceDatabase(&cparams, progname, echo);
143 :
144 0 : initPQExpBuffer(&sql);
145 0 : appendPQExpBuffer(&sql, "DROP ROLE %s%s;",
146 0 : (if_exists ? "IF EXISTS " : ""),
147 0 : fmtIdEnc(dropuser, PQclientEncoding(conn)));
148 :
149 0 : if (echo)
150 0 : printf("%s\n", sql.data);
151 0 : result = PQexec(conn, sql.data);
152 :
153 0 : if (PQresultStatus(result) != PGRES_COMMAND_OK)
154 : {
155 0 : pg_log_error("removal of role \"%s\" failed: %s",
156 : dropuser, PQerrorMessage(conn));
157 0 : PQfinish(conn);
158 0 : exit(1);
159 : }
160 :
161 0 : PQclear(result);
162 0 : PQfinish(conn);
163 0 : exit(0);
164 : }
165 :
166 :
167 : static void
168 0 : help(const char *progname)
169 : {
170 0 : printf(_("%s removes a PostgreSQL role.\n\n"), progname);
171 0 : printf(_("Usage:\n"));
172 0 : printf(_(" %s [OPTION]... [ROLENAME]\n"), progname);
173 0 : printf(_("\nOptions:\n"));
174 0 : printf(_(" -e, --echo show the commands being sent to the server\n"));
175 0 : printf(_(" -i, --interactive prompt before deleting anything, and prompt for\n"
176 : " role name if not specified\n"));
177 0 : printf(_(" -V, --version output version information, then exit\n"));
178 0 : printf(_(" --if-exists don't report error if user doesn't exist\n"));
179 0 : printf(_(" -?, --help show this help, then exit\n"));
180 0 : printf(_("\nConnection options:\n"));
181 0 : printf(_(" -h, --host=HOSTNAME database server host or socket directory\n"));
182 0 : printf(_(" -p, --port=PORT database server port\n"));
183 0 : printf(_(" -U, --username=USERNAME user name to connect as (not the one to drop)\n"));
184 0 : printf(_(" -w, --no-password never prompt for password\n"));
185 0 : printf(_(" -W, --password force password prompt\n"));
186 0 : printf(_("\nReport bugs to <%s>.\n"), PACKAGE_BUGREPORT);
187 0 : printf(_("%s home page: <%s>\n"), PACKAGE_NAME, PACKAGE_URL);
188 0 : }
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