1 /*-------------------------------------------------------------------------
2 *
3 * dropuser
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/dropuser.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 {NULL, 0, NULL, 0}
36 };
37
38 const char *progname;
39 int optindex;
40 int c;
41
42 char *dropuser = NULL;
43 char *host = NULL;
44 char *port = NULL;
45 char *username = NULL;
46 enum trivalue prompt_password = TRI_DEFAULT;
47 ConnParams cparams;
48 bool echo = false;
49 bool interactive = false;
50
51 PQExpBufferData sql;
52
53 PGconn *conn;
54 PGresult *result;
55
56 progname = get_progname(argv[0]);
57 set_pglocale_pgservice(argv[0], PG_TEXTDOMAIN("pgscripts"));
58
59 handle_help_version_opts(argc, argv, "dropuser", help);
60
61 while ((c = getopt_long(argc, argv, "h:p:U:wWei", long_options, &optindex)) != -1)
62 {
63 switch (c)
64 {
65 case 'h':
66 host = pg_strdup(optarg);
67 break;
68 case 'p':
69 port = pg_strdup(optarg);
70 break;
71 case 'U':
72 username = pg_strdup(optarg);
73 break;
74 case 'w':
75 prompt_password = TRI_NO;
76 break;
77 case 'W':
78 prompt_password = TRI_YES;
79 break;
80 case 'e':
81 echo = true;
82 break;
83 case 'i':
84 interactive = true;
85 break;
86 case 0:
87 /* this covers the long options */
88 break;
89 default:
90 fprintf(stderr, _("Try \"%s --help\" for more information.\n"), progname);
91 exit(1);
92 }
93 }
94
95 switch (argc - optind)
96 {
97 case 0:
98 break;
99 case 1:
100 dropuser = argv[optind];
101 break;
102 default:
103 fprintf(stderr, _("%s: too many command-line arguments (first is \"%s\")\n"),
104 progname, argv[optind + 1]);
105 fprintf(stderr, _("Try \"%s --help\" for more information.\n"), progname);
106 exit(1);
107 }
108
109 if (dropuser == NULL)
110 {
111 if (interactive)
112 dropuser = simple_prompt("Enter name of role to drop: ", 128, true);
113 else
114 {
115 fprintf(stderr, _("%s: missing required argument role name\n"), progname);
116 fprintf(stderr, _("Try \"%s --help\" for more information.\n"), progname);
117 exit(1);
118 }
119 }
120
121 if (interactive)
122 {
123 printf(_("Role \"%s\" will be permanently removed.\n"), dropuser);
124 if (!yesno_prompt("Are you sure?"))
125 exit(0);
126 }
127
128 cparams.dbname = NULL; /* this program lacks any dbname option... */
129 cparams.pghost = host;
130 cparams.pgport = port;
131 cparams.pguser = username;
132 cparams.prompt_password = prompt_password;
133 cparams.override_dbname = NULL;
134
135 conn = connectMaintenanceDatabase(&cparams, progname, echo);
136
137 initPQExpBuffer(&sql);
138 appendPQExpBuffer(&sql, "DROP ROLE %s%s;",
139 (if_exists ? "IF EXISTS " : ""), fmtId(dropuser));
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 fprintf(stderr, _("%s: removal of role \"%s\" failed: %s"),
148 progname, dropuser, PQerrorMessage(conn));
149 PQfinish(conn);
150 exit(1);
151 }
152
153 PQclear(result);
154 PQfinish(conn);
155 exit(0);
156 }
157
158
159 static void
help(const char * progname)160 help(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@postgresql.org>.\n"));
179 }
180