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dropdb.c File Reference
#include "postgres_fe.h"
#include "common.h"
#include "common/logging.h"
#include "fe_utils/option_utils.h"
#include "fe_utils/string_utils.h"
Include dependency graph for dropdb.c:

Go to the source code of this file.

Functions

static void help (const char *progname)
 
int main (int argc, char *argv[])
 

Function Documentation

◆ help()

static void help ( const char *  progname)
static

Definition at line 168 of file dropdb.c.

169{
170 printf(_("%s removes a PostgreSQL database.\n\n"), progname);
171 printf(_("Usage:\n"));
172 printf(_(" %s [OPTION]... DBNAME\n"), progname);
173 printf(_("\nOptions:\n"));
174 printf(_(" -e, --echo show the commands being sent to the server\n"));
175 printf(_(" -f, --force try to terminate other connections before dropping\n"));
176 printf(_(" -i, --interactive prompt before deleting anything\n"));
177 printf(_(" -V, --version output version information, then exit\n"));
178 printf(_(" --if-exists don't report error if database doesn't exist\n"));
179 printf(_(" -?, --help show this help, then exit\n"));
180 printf(_("\nConnection options:\n"));
181 printf(_(" -h, --host=HOSTNAME database server host or socket directory\n"));
182 printf(_(" -p, --port=PORT database server port\n"));
183 printf(_(" -U, --username=USERNAME user name to connect as\n"));
184 printf(_(" -w, --no-password never prompt for password\n"));
185 printf(_(" -W, --password force password prompt\n"));
186 printf(_(" --maintenance-db=DBNAME alternate maintenance database\n"));
187 printf(_("\nReport bugs to <%s>.\n"), PACKAGE_BUGREPORT);
188 printf(_("%s home page: <%s>\n"), PACKAGE_NAME, PACKAGE_URL);
189}
_
#define _(x)
Definition: elog.c:91
progname
const char * progname
Definition: main.c:44
printf
#define printf(...)
Definition: port.h:245

References _, printf, and progname.

Referenced by main().

◆ main()

int main ( int  argc,
char *  argv[] 
)

Definition at line 24 of file dropdb.c.

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 char *dbname = NULL;
47 char *maintenance_db = NULL;
48 char *host = NULL;
49 char *port = NULL;
50 char *username = NULL;
51 enum trivalue prompt_password = TRI_DEFAULT;
52 ConnParams cparams;
53 bool echo = false;
54 bool interactive = false;
55 bool force = false;
56
57 PQExpBufferData sql;
58
59 PGconn *conn;
60 PGresult *result;
61
62 pg_logging_init(argv[0]);
63 progname = get_progname(argv[0]);
64 set_pglocale_pgservice(argv[0], PG_TEXTDOMAIN("pgscripts"));
65
66 handle_help_version_opts(argc, argv, "dropdb", help);
67
68 while ((c = getopt_long(argc, argv, "efh:ip:U:wW", long_options, &optindex)) != -1)
69 {
70 switch (c)
71 {
72 case 'e':
73 echo = true;
74 break;
75 case 'f':
76 force = true;
77 break;
78 case 'h':
79 host = pg_strdup(optarg);
80 break;
81 case 'i':
82 interactive = true;
83 break;
84 case 'p':
85 port = pg_strdup(optarg);
86 break;
87 case 'U':
88 username = pg_strdup(optarg);
89 break;
90 case 'w':
91 prompt_password = TRI_NO;
92 break;
93 case 'W':
94 prompt_password = TRI_YES;
95 break;
96 case 0:
97 /* this covers the long options */
98 break;
99 case 2:
100 maintenance_db = pg_strdup(optarg);
101 break;
102 default:
103 /* getopt_long already emitted a complaint */
104 pg_log_error_hint("Try \"%s --help\" for more information.", progname);
105 exit(1);
106 }
107 }
108
109 switch (argc - optind)
110 {
111 case 0:
112 pg_log_error("missing required argument database name");
113 pg_log_error_hint("Try \"%s --help\" for more information.", progname);
114 exit(1);
115 case 1:
116 dbname = argv[optind];
117 break;
118 default:
119 pg_log_error("too many command-line arguments (first is \"%s\")",
120 argv[optind + 1]);
121 pg_log_error_hint("Try \"%s --help\" for more information.", progname);
122 exit(1);
123 }
124
125 if (interactive)
126 {
127 printf(_("Database \"%s\" will be permanently removed.\n"), dbname);
128 if (!yesno_prompt("Are you sure?"))
129 exit(0);
130 }
131
132 /* Avoid trying to drop postgres db while we are connected to it. */
133 if (maintenance_db == NULL && strcmp(dbname, "postgres") == 0)
134 maintenance_db = "template1";
135
136 cparams.dbname = maintenance_db;
137 cparams.pghost = host;
138 cparams.pgport = port;
139 cparams.pguser = username;
140 cparams.prompt_password = prompt_password;
141 cparams.override_dbname = NULL;
142
143 conn = connectMaintenanceDatabase(&cparams, progname, echo);
144
145 initPQExpBuffer(&sql);
146 appendPQExpBuffer(&sql, "DROP DATABASE %s%s%s;",
147 (if_exists ? "IF EXISTS " : ""),
148 fmtIdEnc(dbname, PQclientEncoding(conn)),
149 force ? " WITH (FORCE)" : "");
150
151 if (echo)
152 printf("%s\n", sql.data);
153 result = PQexec(conn, sql.data);
154 if (PQresultStatus(result) != PGRES_COMMAND_OK)
155 {
156 pg_log_error("database removal failed: %s", PQerrorMessage(conn));
157 PQfinish(conn);
158 exit(1);
159 }
160
161 PQclear(result);
162 PQfinish(conn);
163 exit(0);
164}
yesno_prompt
bool yesno_prompt(const char *question)
Definition: common.c:136
PG_TEXTDOMAIN
#define PG_TEXTDOMAIN(domain)
Definition: c.h:1185
set_pglocale_pgservice
void set_pglocale_pgservice(const char *argv0, const char *app)
Definition: exec.c:429
connectMaintenanceDatabase
PGconn * connectMaintenanceDatabase(ConnParams *cparams, const char *progname, bool echo)
Definition: connect_utils.c:134
help
static void help(const char *progname)
Definition: dropdb.c:168
PQclientEncoding
int PQclientEncoding(const PGconn *conn)
Definition: fe-connect.c:7719
PQfinish
void PQfinish(PGconn *conn)
Definition: fe-connect.c:5300
PQerrorMessage
char * PQerrorMessage(const PGconn *conn)
Definition: fe-connect.c:7629
PQresultStatus
ExecStatusType PQresultStatus(const PGresult *res)
Definition: fe-exec.c:3411
PQclear
void PQclear(PGresult *res)
Definition: fe-exec.c:721
PQexec
PGresult * PQexec(PGconn *conn, const char *query)
Definition: fe-exec.c:2262
pg_strdup
char * pg_strdup(const char *in)
Definition: fe_memutils.c:85
getopt_long
int getopt_long(int argc, char *const argv[], const char *optstring, const struct option *longopts, int *longindex)
Definition: getopt_long.c:60
no_argument
#define no_argument
Definition: getopt_long.h:25
required_argument
#define required_argument
Definition: getopt_long.h:26
username
static char * username
Definition: initdb.c:153
PGRES_COMMAND_OK
@ PGRES_COMMAND_OK
Definition: libpq-fe.h:125
pg_logging_init
void pg_logging_init(const char *argv0)
Definition: logging.c:83
pg_log_error
#define pg_log_error(...)
Definition: logging.h:106
pg_log_error_hint
#define pg_log_error_hint(...)
Definition: logging.h:112
handle_help_version_opts
void handle_help_version_opts(int argc, char *argv[], const char *fixed_progname, help_handler hlp)
Definition: option_utils.c:24
if_exists
static int if_exists
Definition: pg_dumpall.c:94
optind
PGDLLIMPORT int optind
Definition: getopt.c:51
optarg
PGDLLIMPORT char * optarg
Definition: getopt.c:53
port
static int port
Definition: pg_regress.c:115
get_progname
const char * get_progname(const char *argv0)
Definition: path.c:652
initPQExpBuffer
void initPQExpBuffer(PQExpBuffer str)
Definition: pqexpbuffer.c:90
appendPQExpBuffer
void appendPQExpBuffer(PQExpBuffer str, const char *fmt,...)
Definition: pqexpbuffer.c:265
c
char * c
Definition: preproc-cursor.c:31
dbname
char * dbname
Definition: streamutil.c:49
conn
PGconn * conn
Definition: streamutil.c:52
fmtIdEnc
const char * fmtIdEnc(const char *rawid, int encoding)
Definition: string_utils.c:101
_connParams
Definition: pg_backup.h:84
_connParams::pguser
const char * pguser
Definition: connect_utils.h:31
_connParams::override_dbname
char * override_dbname
Definition: pg_backup.h:93
_connParams::pgport
char * pgport
Definition: pg_backup.h:87
_connParams::pghost
char * pghost
Definition: pg_backup.h:88
_connParams::dbname
char * dbname
Definition: pg_backup.h:86
_connParams::prompt_password
enum trivalue prompt_password
Definition: connect_utils.h:32
pg_conn
Definition: libpq-int.h:371
pg_result
Definition: libpq-int.h:165
trivalue
trivalue
Definition: vacuumlo.c:35
TRI_YES
@ TRI_YES
Definition: vacuumlo.c:38
TRI_DEFAULT
@ TRI_DEFAULT
Definition: vacuumlo.c:36
TRI_NO
@ TRI_NO
Definition: vacuumlo.c:37

References _, appendPQExpBuffer(), conn, connectMaintenanceDatabase(), PQExpBufferData::data, dbname, _connParams::dbname, fmtIdEnc(), get_progname(), getopt_long(), handle_help_version_opts(), help(), if_exists, initPQExpBuffer(), no_argument, optarg, optind, _connParams::override_dbname, pg_log_error, pg_log_error_hint, pg_logging_init(), pg_strdup(), PG_TEXTDOMAIN, _connParams::pghost, _connParams::pgport, PGRES_COMMAND_OK, _connParams::pguser, port, PQclear(), PQclientEncoding(), PQerrorMessage(), PQexec(), PQfinish(), PQresultStatus(), printf, progname, _connParams::prompt_password, required_argument, set_pglocale_pgservice(), TRI_DEFAULT, TRI_NO, TRI_YES, username, and yesno_prompt().