1/*-------------------------------------------------------------------------
2 *
3 * dropuser
4 *
5 * Portions Copyright (c) 1996-2019, 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 "fe_utils/string_utils.h"
17
18
19static void help(const char *progname);
20
21
22int
23main(int argc, char *argv[])
24{
25 static int if_exists = 0;
26
27 static struct option long_options[] = {
28 {"host", required_argument, NULL, 'h'},
29 {"port", required_argument, NULL, 'p'},
30 {"username", required_argument, NULL, 'U'},
31 {"no-password", no_argument, NULL, 'w'},
32 {"password", no_argument, NULL, 'W'},
33 {"echo", no_argument, NULL, 'e'},
34 {"interactive", no_argument, NULL, 'i'},
35 {"if-exists", no_argument, &if_exists, 1},
36 {NULL, 0, NULL, 0}
37 };
38
39 const char *progname;
40 int optindex;
41 int c;
42
43 char *dropuser = NULL;
44 char *host = NULL;
45 char *port = NULL;
46 char *username = NULL;
47 enum trivalue prompt_password = TRI_DEFAULT;
48 bool echo = false;
49 bool interactive = false;
50 char dropuser_buf[128];
51
52 PQExpBufferData sql;
53
54 PGconn *conn;
55 PGresult *result;
56
57 pg_logging_init(argv[0]);
58 progname = get_progname(argv[0]);
59 set_pglocale_pgservice(argv[0], PG_TEXTDOMAIN("pgscripts"));
60
61 handle_help_version_opts(argc, argv, "dropuser", 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 default:
92 fprintf(stderr, _("Try \"%s --help\" for more information.\n"), progname);
93 exit(1);
94 }
95 }
96
97 switch (argc - optind)
98 {
99 case 0:
100 break;
101 case 1:
102 dropuser = argv[optind];
103 break;
104 default:
105 pg_log_error("too many command-line arguments (first is \"%s\")",
106 argv[optind + 1]);
107 fprintf(stderr, _("Try \"%s --help\" for more information.\n"), progname);
108 exit(1);
109 }
110
111 if (dropuser == NULL)
112 {
113 if (interactive)
114 {
115 simple_prompt("Enter name of role to drop: ",
116 dropuser_buf, sizeof(dropuser_buf), true);
117 dropuser = dropuser_buf;
118 }
119 else
120 {
121 pg_log_error("missing required argument role name");
122 fprintf(stderr, _("Try \"%s --help\" for more information.\n"), progname);
123 exit(1);
124 }
125 }
126
127 if (interactive)
128 {
129 printf(_("Role \"%s\" will be permanently removed.\n"), dropuser);
130 if (!yesno_prompt("Are you sure?"))
131 exit(0);
132 }
133
134 initPQExpBuffer(&sql);
135 appendPQExpBuffer(&sql, "DROP ROLE %s%s;",
136 (if_exists ? "IF EXISTS " : ""), fmtId(dropuser));
137
138 conn = connectDatabase("postgres", host, port, username, prompt_password,
139 progname, echo, false, false);
140
141 if (echo)
142 printf("%s\n", sql.data);
143 result = PQexec(conn, sql.data);
144
145 if (PQresultStatus(result) != PGRES_COMMAND_OK)
146 {
147 pg_log_error("removal of role \"%s\" failed: %s",
148 dropuser, PQerrorMessage(conn));
149 PQfinish(conn);
150 exit(1);
151 }
152
153 PQclear(result);
154 PQfinish(conn);
155 exit(0);
156}
157
158
159static void
160help(const char *progname)
161{
162 printf(_("%s removes a PostgreSQL role.\n\n"), progname);
163 printf(_("Usage:\n"));
164 printf(_(" %s [OPTION]... [ROLENAME]\n"), progname);
165 printf(_("\nOptions:\n"));
166 printf(_(" -e, --echo show the commands being sent to the server\n"));
167 printf(_(" -i, --interactive prompt before deleting anything, and prompt for\n"
168 " role name if not specified\n"));
169 printf(_(" -V, --version output version information, then exit\n"));
170 printf(_(" --if-exists don't report error if user doesn't exist\n"));
171 printf(_(" -?, --help show this help, then exit\n"));
172 printf(_("\nConnection options:\n"));
173 printf(_(" -h, --host=HOSTNAME database server host or socket directory\n"));
174 printf(_(" -p, --port=PORT database server port\n"));
175 printf(_(" -U, --username=USERNAME user name to connect as (not the one to drop)\n"));
176 printf(_(" -w, --no-password never prompt for password\n"));
177 printf(_(" -W, --password force password prompt\n"));
178 printf(_("\nReport bugs to <pgsql-bugs@lists.postgresql.org>.\n"));
179}
180