LCOV - code coverage report
Current view: top level - src/bin/scripts - dropuser.c (source / functions) Hit Total Coverage
Test: PostgreSQL 17devel Lines: 61 99 61.6 %
Date: 2024-05-19 08:10:29 Functions: 2 2 100.0 %
Legend: Lines: hit not hit

          Line data    Source code
       1             : /*-------------------------------------------------------------------------
       2             :  *
       3             :  * dropuser
       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/dropuser.c
       9             :  *
      10             :  *-------------------------------------------------------------------------
      11             :  */
      12             : 
      13             : #include "postgres_fe.h"
      14             : #include "common.h"
      15             : #include "common/logging.h"
      16             : #include "common/string.h"
      17             : #include "fe_utils/option_utils.h"
      18             : #include "fe_utils/string_utils.h"
      19             : 
      20             : 
      21             : static void help(const char *progname);
      22             : 
      23             : 
      24             : int
      25          10 : main(int argc, char *argv[])
      26             : {
      27             :     static int  if_exists = 0;
      28             : 
      29             :     static struct option long_options[] = {
      30             :         {"host", required_argument, NULL, 'h'},
      31             :         {"port", required_argument, NULL, 'p'},
      32             :         {"username", required_argument, NULL, 'U'},
      33             :         {"no-password", no_argument, NULL, 'w'},
      34             :         {"password", no_argument, NULL, 'W'},
      35             :         {"echo", no_argument, NULL, 'e'},
      36             :         {"interactive", no_argument, NULL, 'i'},
      37             :         {"if-exists", no_argument, &if_exists, 1},
      38             :         {NULL, 0, NULL, 0}
      39             :     };
      40             : 
      41             :     const char *progname;
      42             :     int         optindex;
      43             :     int         c;
      44             : 
      45          10 :     char       *dropuser = NULL;
      46          10 :     char       *host = NULL;
      47          10 :     char       *port = NULL;
      48          10 :     char       *username = NULL;
      49          10 :     enum trivalue prompt_password = TRI_DEFAULT;
      50             :     ConnParams  cparams;
      51          10 :     bool        echo = false;
      52          10 :     bool        interactive = false;
      53             : 
      54             :     PQExpBufferData sql;
      55             : 
      56             :     PGconn     *conn;
      57             :     PGresult   *result;
      58             : 
      59          10 :     pg_logging_init(argv[0]);
      60          10 :     progname = get_progname(argv[0]);
      61          10 :     set_pglocale_pgservice(argv[0], PG_TEXTDOMAIN("pgscripts"));
      62             : 
      63          10 :     handle_help_version_opts(argc, argv, "dropuser", help);
      64             : 
      65           6 :     while ((c = getopt_long(argc, argv, "eh:ip:U:wW", long_options, &optindex)) != -1)
      66             :     {
      67           2 :         switch (c)
      68             :         {
      69           0 :             case 'e':
      70           0 :                 echo = true;
      71           0 :                 break;
      72           0 :             case 'h':
      73           0 :                 host = pg_strdup(optarg);
      74           0 :                 break;
      75           0 :             case 'i':
      76           0 :                 interactive = true;
      77           0 :                 break;
      78           0 :             case 'p':
      79           0 :                 port = pg_strdup(optarg);
      80           0 :                 break;
      81           0 :             case 'U':
      82           0 :                 username = pg_strdup(optarg);
      83           0 :                 break;
      84           0 :             case 'w':
      85           0 :                 prompt_password = TRI_NO;
      86           0 :                 break;
      87           0 :             case 'W':
      88           0 :                 prompt_password = TRI_YES;
      89           0 :                 break;
      90           0 :             case 0:
      91             :                 /* this covers the long options */
      92           0 :                 break;
      93           2 :             default:
      94             :                 /* getopt_long already emitted a complaint */
      95           2 :                 pg_log_error_hint("Try \"%s --help\" for more information.", progname);
      96           2 :                 exit(1);
      97             :         }
      98             :     }
      99             : 
     100           4 :     switch (argc - optind)
     101             :     {
     102           0 :         case 0:
     103           0 :             break;
     104           4 :         case 1:
     105           4 :             dropuser = argv[optind];
     106           4 :             break;
     107           0 :         default:
     108           0 :             pg_log_error("too many command-line arguments (first is \"%s\")",
     109             :                          argv[optind + 1]);
     110           0 :             pg_log_error_hint("Try \"%s --help\" for more information.", progname);
     111           0 :             exit(1);
     112             :     }
     113             : 
     114           4 :     if (dropuser == NULL)
     115             :     {
     116           0 :         if (interactive)
     117             :         {
     118           0 :             dropuser = simple_prompt("Enter name of role to drop: ", true);
     119             :         }
     120             :         else
     121             :         {
     122           0 :             pg_log_error("missing required argument role name");
     123           0 :             pg_log_error_hint("Try \"%s --help\" for more information.", progname);
     124           0 :             exit(1);
     125             :         }
     126             :     }
     127             : 
     128           4 :     if (interactive)
     129             :     {
     130           0 :         printf(_("Role \"%s\" will be permanently removed.\n"), dropuser);
     131           0 :         if (!yesno_prompt("Are you sure?"))
     132           0 :             exit(0);
     133             :     }
     134             : 
     135           4 :     cparams.dbname = NULL;      /* this program lacks any dbname option... */
     136           4 :     cparams.pghost = host;
     137           4 :     cparams.pgport = port;
     138           4 :     cparams.pguser = username;
     139           4 :     cparams.prompt_password = prompt_password;
     140           4 :     cparams.override_dbname = NULL;
     141             : 
     142           4 :     conn = connectMaintenanceDatabase(&cparams, progname, echo);
     143             : 
     144           4 :     initPQExpBuffer(&sql);
     145           8 :     appendPQExpBuffer(&sql, "DROP ROLE %s%s;",
     146           4 :                       (if_exists ? "IF EXISTS " : ""), fmtId(dropuser));
     147             : 
     148           4 :     if (echo)
     149           0 :         printf("%s\n", sql.data);
     150           4 :     result = PQexec(conn, sql.data);
     151             : 
     152           4 :     if (PQresultStatus(result) != PGRES_COMMAND_OK)
     153             :     {
     154           2 :         pg_log_error("removal of role \"%s\" failed: %s",
     155             :                      dropuser, PQerrorMessage(conn));
     156           2 :         PQfinish(conn);
     157           2 :         exit(1);
     158             :     }
     159             : 
     160           2 :     PQclear(result);
     161           2 :     PQfinish(conn);
     162           2 :     exit(0);
     163             : }
     164             : 
     165             : 
     166             : static void
     167           2 : help(const char *progname)
     168             : {
     169           2 :     printf(_("%s removes a PostgreSQL role.\n\n"), progname);
     170           2 :     printf(_("Usage:\n"));
     171           2 :     printf(_("  %s [OPTION]... [ROLENAME]\n"), progname);
     172           2 :     printf(_("\nOptions:\n"));
     173           2 :     printf(_("  -e, --echo                show the commands being sent to the server\n"));
     174           2 :     printf(_("  -i, --interactive         prompt before deleting anything, and prompt for\n"
     175             :              "                            role name if not specified\n"));
     176           2 :     printf(_("  -V, --version             output version information, then exit\n"));
     177           2 :     printf(_("  --if-exists               don't report error if user doesn't exist\n"));
     178           2 :     printf(_("  -?, --help                show this help, then exit\n"));
     179           2 :     printf(_("\nConnection options:\n"));
     180           2 :     printf(_("  -h, --host=HOSTNAME       database server host or socket directory\n"));
     181           2 :     printf(_("  -p, --port=PORT           database server port\n"));
     182           2 :     printf(_("  -U, --username=USERNAME   user name to connect as (not the one to drop)\n"));
     183           2 :     printf(_("  -w, --no-password         never prompt for password\n"));
     184           2 :     printf(_("  -W, --password            force password prompt\n"));
     185           2 :     printf(_("\nReport bugs to <%s>.\n"), PACKAGE_BUGREPORT);
     186           2 :     printf(_("%s home page: <%s>\n"), PACKAGE_NAME, PACKAGE_URL);
     187           2 : }

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