LCOV - code coverage report
Current view: top level - src/bin/scripts - dropdb.c (source / functions) Hit Total Coverage
Test: PostgreSQL 17devel Lines: 71 107 66.4 %
Date: 2024-05-19 08:10:29 Functions: 2 2 100.0 %
Legend: Lines: hit not hit

          Line data    Source code
       1             : /*-------------------------------------------------------------------------
       2             :  *
       3             :  * dropdb
       4             :  *
       5             :  * Portions Copyright (c) 1996-2024, PostgreSQL Global Development Group
       6             :  * Portions Copyright (c) 1994, Regents of the University of California
       7             :  *
       8             :  * src/bin/scripts/dropdb.c
       9             :  *
      10             :  *-------------------------------------------------------------------------
      11             :  */
      12             : 
      13             : #include "postgres_fe.h"
      14             : #include "common.h"
      15             : #include "common/logging.h"
      16             : #include "fe_utils/option_utils.h"
      17             : #include "fe_utils/string_utils.h"
      18             : 
      19             : 
      20             : static void help(const char *progname);
      21             : 
      22             : 
      23             : int
      24          20 : main(int argc, char *argv[])
      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          20 :     char       *dbname = NULL;
      47          20 :     char       *maintenance_db = NULL;
      48          20 :     char       *host = NULL;
      49          20 :     char       *port = NULL;
      50          20 :     char       *username = NULL;
      51          20 :     enum trivalue prompt_password = TRI_DEFAULT;
      52             :     ConnParams  cparams;
      53          20 :     bool        echo = false;
      54          20 :     bool        interactive = false;
      55          20 :     bool        force = false;
      56             : 
      57             :     PQExpBufferData sql;
      58             : 
      59             :     PGconn     *conn;
      60             :     PGresult   *result;
      61             : 
      62          20 :     pg_logging_init(argv[0]);
      63          20 :     progname = get_progname(argv[0]);
      64          20 :     set_pglocale_pgservice(argv[0], PG_TEXTDOMAIN("pgscripts"));
      65             : 
      66          20 :     handle_help_version_opts(argc, argv, "dropdb", help);
      67             : 
      68          24 :     while ((c = getopt_long(argc, argv, "efh:ip:U:wW", long_options, &optindex)) != -1)
      69             :     {
      70          10 :         switch (c)
      71             :         {
      72           0 :             case 'e':
      73           0 :                 echo = true;
      74           0 :                 break;
      75           2 :             case 'f':
      76           2 :                 force = true;
      77           2 :                 break;
      78           0 :             case 'h':
      79           0 :                 host = pg_strdup(optarg);
      80           0 :                 break;
      81           0 :             case 'i':
      82           0 :                 interactive = true;
      83           0 :                 break;
      84           0 :             case 'p':
      85           0 :                 port = pg_strdup(optarg);
      86           0 :                 break;
      87           6 :             case 'U':
      88           6 :                 username = pg_strdup(optarg);
      89           6 :                 break;
      90           0 :             case 'w':
      91           0 :                 prompt_password = TRI_NO;
      92           0 :                 break;
      93           0 :             case 'W':
      94           0 :                 prompt_password = TRI_YES;
      95           0 :                 break;
      96           0 :             case 0:
      97             :                 /* this covers the long options */
      98           0 :                 break;
      99           0 :             case 2:
     100           0 :                 maintenance_db = pg_strdup(optarg);
     101           0 :                 break;
     102           2 :             default:
     103             :                 /* getopt_long already emitted a complaint */
     104           2 :                 pg_log_error_hint("Try \"%s --help\" for more information.", progname);
     105           2 :                 exit(1);
     106             :         }
     107             :     }
     108             : 
     109          14 :     switch (argc - optind)
     110             :     {
     111           0 :         case 0:
     112           0 :             pg_log_error("missing required argument database name");
     113           0 :             pg_log_error_hint("Try \"%s --help\" for more information.", progname);
     114           0 :             exit(1);
     115          14 :         case 1:
     116          14 :             dbname = argv[optind];
     117          14 :             break;
     118           0 :         default:
     119           0 :             pg_log_error("too many command-line arguments (first is \"%s\")",
     120             :                          argv[optind + 1]);
     121           0 :             pg_log_error_hint("Try \"%s --help\" for more information.", progname);
     122           0 :             exit(1);
     123             :     }
     124             : 
     125          14 :     if (interactive)
     126             :     {
     127           0 :         printf(_("Database \"%s\" will be permanently removed.\n"), dbname);
     128           0 :         if (!yesno_prompt("Are you sure?"))
     129           0 :             exit(0);
     130             :     }
     131             : 
     132          14 :     initPQExpBuffer(&sql);
     133             : 
     134          28 :     appendPQExpBuffer(&sql, "DROP DATABASE %s%s%s;",
     135          14 :                       (if_exists ? "IF EXISTS " : ""),
     136             :                       fmtId(dbname),
     137             :                       force ? " WITH (FORCE)" : "");
     138             : 
     139             :     /* Avoid trying to drop postgres db while we are connected to it. */
     140          14 :     if (maintenance_db == NULL && strcmp(dbname, "postgres") == 0)
     141           0 :         maintenance_db = "template1";
     142             : 
     143          14 :     cparams.dbname = maintenance_db;
     144          14 :     cparams.pghost = host;
     145          14 :     cparams.pgport = port;
     146          14 :     cparams.pguser = username;
     147          14 :     cparams.prompt_password = prompt_password;
     148          14 :     cparams.override_dbname = NULL;
     149             : 
     150          14 :     conn = connectMaintenanceDatabase(&cparams, progname, echo);
     151             : 
     152          14 :     if (echo)
     153           0 :         printf("%s\n", sql.data);
     154          14 :     result = PQexec(conn, sql.data);
     155          14 :     if (PQresultStatus(result) != PGRES_COMMAND_OK)
     156             :     {
     157           2 :         pg_log_error("database removal failed: %s", PQerrorMessage(conn));
     158           2 :         PQfinish(conn);
     159           2 :         exit(1);
     160             :     }
     161             : 
     162          12 :     PQclear(result);
     163          12 :     PQfinish(conn);
     164          12 :     exit(0);
     165             : }
     166             : 
     167             : 
     168             : static void
     169           2 : help(const char *progname)
     170             : {
     171           2 :     printf(_("%s removes a PostgreSQL database.\n\n"), progname);
     172           2 :     printf(_("Usage:\n"));
     173           2 :     printf(_("  %s [OPTION]... DBNAME\n"), progname);
     174           2 :     printf(_("\nOptions:\n"));
     175           2 :     printf(_("  -e, --echo                show the commands being sent to the server\n"));
     176           2 :     printf(_("  -f, --force               try to terminate other connections before dropping\n"));
     177           2 :     printf(_("  -i, --interactive         prompt before deleting anything\n"));
     178           2 :     printf(_("  -V, --version             output version information, then exit\n"));
     179           2 :     printf(_("  --if-exists               don't report error if database doesn't exist\n"));
     180           2 :     printf(_("  -?, --help                show this help, then exit\n"));
     181           2 :     printf(_("\nConnection options:\n"));
     182           2 :     printf(_("  -h, --host=HOSTNAME       database server host or socket directory\n"));
     183           2 :     printf(_("  -p, --port=PORT           database server port\n"));
     184           2 :     printf(_("  -U, --username=USERNAME   user name to connect as\n"));
     185           2 :     printf(_("  -w, --no-password         never prompt for password\n"));
     186           2 :     printf(_("  -W, --password            force password prompt\n"));
     187           2 :     printf(_("  --maintenance-db=DBNAME   alternate maintenance database\n"));
     188           2 :     printf(_("\nReport bugs to <%s>.\n"), PACKAGE_BUGREPORT);
     189           2 :     printf(_("%s home page: <%s>\n"), PACKAGE_NAME, PACKAGE_URL);
     190           2 : }

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