src/bin/scripts/dropdb.c

   1 /*-------------------------------------------------------------------------
   2  *
   3  * dropdb
   4  *
   5  * Portions Copyright (c) 1996-2009, PostgreSQL Global Development Group
   6  * Portions Copyright (c) 1994, Regents of the University of California
   7  *
   8  * $PostgreSQL$
   9  *
  10  *-------------------------------------------------------------------------
  11  */
  12
  13 #include "postgres_fe.h"
  14 #include "common.h"
  15 #include "dumputils.h"
  16
  17
  18 static void help(const char *progname);
  19
  20
  21 int
  22 main(int argc, char *argv[])
  23 {
  24         static struct option long_options[] = {
  25                 {"host", required_argument, NULL, 'h'},
  26                 {"port", required_argument, NULL, 'p'},
  27                 {"username", required_argument, NULL, 'U'},
  28                 {"no-password", no_argument, NULL, 'w'},
  29                 {"password", no_argument, NULL, 'W'},
  30                 {"echo", no_argument, NULL, 'e'},
  31                 {"interactive", no_argument, NULL, 'i'},
  32                 {NULL, 0, NULL, 0}
  33         };
  34
  35         const char *progname;
  36         int                     optindex;
  37         int                     c;
  38
  39         char       *dbname = NULL;
  40         char       *host = NULL;
  41         char       *port = NULL;
  42         char       *username = NULL;
  43         enum trivalue prompt_password = TRI_DEFAULT;
  44         bool            echo = false;
  45         bool            interactive = false;
  46
  47         PQExpBufferData sql;
  48
  49         PGconn     *conn;
  50         PGresult   *result;
  51
  52         progname = get_progname(argv[0]);
  53         set_pglocale_pgservice(argv[0], PG_TEXTDOMAIN("pgscripts"));
  54
  55         handle_help_version_opts(argc, argv, "dropdb", help);
  56
  57         while ((c = getopt_long(argc, argv, "h:p:U:wWei", long_options, &optindex)) != -1)
  58         {
  59                 switch (c)
  60                 {
  61                         case 'h':
  62                                 host = optarg;
  63                                 break;
  64                         case 'p':
  65                                 port = optarg;
  66                                 break;
  67                         case 'U':
  68                                 username = optarg;
  69                                 break;
  70                         case 'w':
  71                                 prompt_password = TRI_NO;
  72                                 break;
  73                         case 'W':
  74                                 prompt_password = TRI_YES;
  75                                 break;
  76                         case 'e':
  77                                 echo = true;
  78                                 break;
  79                         case 'i':
  80                                 interactive = true;
  81                                 break;
  82                         default:
  83                                 fprintf(stderr, _("Try \"%s --help\" for more information.\n"), progname);
  84                                 exit(1);
  85                 }
  86         }
  87
  88         switch (argc - optind)
  89         {
  90                 case 0:
  91                         fprintf(stderr, _("%s: missing required argument database name\n"), progname);
  92                         fprintf(stderr, _("Try \"%s --help\" for more information.\n"), progname);
  93                         exit(1);
  94                 case 1:
  95                         dbname = argv[optind];
  96                         break;
  97                 default:
  98                         fprintf(stderr, _("%s: too many command-line arguments (first is \"%s\")\n"),
  99                                         progname, argv[optind + 1]);
 100                         fprintf(stderr, _("Try \"%s --help\" for more information.\n"), progname);
 101                         exit(1);
 102         }
 103
 104         if (interactive)
 105         {
 106                 printf(_("Database \"%s\" will be permanently removed.\n"), dbname);
 107                 if (!yesno_prompt("Are you sure?"))
 108                         exit(0);
 109         }
 110
 111         initPQExpBuffer(&sql);
 112
 113         appendPQExpBuffer(&sql, "DROP DATABASE %s;\n",
 114                                           fmtId(dbname));
 115
 116         conn = connectDatabase(strcmp(dbname, "postgres") == 0 ? "template1" : "postgres",
 117                                                    host, port, username, prompt_password, progname);
 118
 119         if (echo)
 120                 printf("%s", sql.data);
 121         result = PQexec(conn, sql.data);
 122         if (PQresultStatus(result) != PGRES_COMMAND_OK)
 123         {
 124                 fprintf(stderr, _("%s: database removal failed: %s"),
 125                                 progname, PQerrorMessage(conn));
 126                 PQfinish(conn);
 127                 exit(1);
 128         }
 129
 130         PQclear(result);
 131         PQfinish(conn);
 132         exit(0);
 133 }
 134
 135
 136 static void
 137 help(const char *progname)
 138 {
 139         printf(_("%s removes a PostgreSQL database.\n\n"), progname);
 140         printf(_("Usage:\n"));
 141         printf(_("  %s [OPTION]... DBNAME\n"), progname);
 142         printf(_("\nOptions:\n"));
 143         printf(_("  -e, --echo                show the commands being sent to the server\n"));
 144         printf(_("  -i, --interactive         prompt before deleting anything\n"));
 145         printf(_("  --help                    show this help, then exit\n"));
 146         printf(_("  --version                 output version information, then exit\n"));
 147         printf(_("\nConnection options:\n"));
 148         printf(_("  -h, --host=HOSTNAME       database server host or socket directory\n"));
 149         printf(_("  -p, --port=PORT           database server port\n"));
 150         printf(_("  -U, --username=USERNAME   user name to connect as\n"));
 151         printf(_("  -w, --no-password         never prompt for password\n"));
 152         printf(_("  -W, --password            force password prompt\n"));
 153         printf(_("\nReport bugs to <pgsql-bugs@postgresql.org>.\n"));
 154 }