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postgresql/src/bin/pg_dump/pg_dumpall.c

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/*-------------------------------------------------------------------------
*
* pg_dumpall.c
*
* Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* pg_dumpall forces all pg_dump output to be text, since it also outputs
* text into the same output stream.
*
* src/bin/pg_dump/pg_dumpall.c
*
*-------------------------------------------------------------------------
*/
#include "postgres_fe.h"
#include <time.h>
#include <unistd.h>
#include "common/file_utils.h"
#include "common/logging.h"
#include "dumputils.h"
#include "fe_utils/connect.h"
#include "fe_utils/string_utils.h"
#include "getopt_long.h"
#include "pg_backup.h"
/* version string we expect back from pg_dump */
#define PGDUMP_VERSIONSTR "pg_dump (PostgreSQL) " PG_VERSION "\n"
static void help(void);
static void dropRoles(PGconn *conn);
static void dumpRoles(PGconn *conn);
static void dumpRoleMembership(PGconn *conn);
static void dumpGroups(PGconn *conn);
static void dropTablespaces(PGconn *conn);
static void dumpTablespaces(PGconn *conn);
static void dropDBs(PGconn *conn);
static void dumpUserConfig(PGconn *conn, const char *username);
static void dumpDatabases(PGconn *conn);
static void dumpTimestamp(const char *msg);
static int runPgDump(const char *dbname, const char *create_opts);
static void buildShSecLabels(PGconn *conn,
const char *catalog_name, Oid objectId,
const char *objtype, const char *objname,
PQExpBuffer buffer);
static PGconn *connectDatabase(const char *dbname, const char *connstr, const char *pghost, const char *pgport,
const char *pguser, trivalue prompt_password, bool fail_on_error);
static char *constructConnStr(const char **keywords, const char **values);
static PGresult *executeQuery(PGconn *conn, const char *query);
static void executeCommand(PGconn *conn, const char *query);
static void expand_dbname_patterns(PGconn *conn, SimpleStringList *patterns,
SimpleStringList *names);
static char pg_dump_bin[MAXPGPATH];
static const char *progname;
static PQExpBuffer pgdumpopts;
static char *connstr = "";
static bool output_clean = false;
static bool skip_acls = false;
static bool verbose = false;
static bool dosync = true;
static int binary_upgrade = 0;
static int column_inserts = 0;
static int disable_dollar_quoting = 0;
static int disable_triggers = 0;
static int if_exists = 0;
static int inserts = 0;
static int no_tablespaces = 0;
static int use_setsessauth = 0;
static int no_comments = 0;
static int no_publications = 0;
static int no_security_labels = 0;
static int no_subscriptions = 0;
static int no_unlogged_table_data = 0;
static int no_role_passwords = 0;
static int server_version;
static int load_via_partition_root = 0;
static int on_conflict_do_nothing = 0;
static char role_catalog[10];
#define PG_AUTHID "pg_authid"
#define PG_ROLES "pg_roles "
static FILE *OPF;
static char *filename = NULL;
static SimpleStringList database_exclude_patterns = {NULL, NULL};
static SimpleStringList database_exclude_names = {NULL, NULL};
#define exit_nicely(code) exit(code)
int
main(int argc, char *argv[])
{
static struct option long_options[] = {
{"data-only", no_argument, NULL, 'a'},
{"clean", no_argument, NULL, 'c'},
{"encoding", required_argument, NULL, 'E'},
{"file", required_argument, NULL, 'f'},
{"globals-only", no_argument, NULL, 'g'},
{"host", required_argument, NULL, 'h'},
{"dbname", required_argument, NULL, 'd'},
{"database", required_argument, NULL, 'l'},
{"no-owner", no_argument, NULL, 'O'},
{"port", required_argument, NULL, 'p'},
{"roles-only", no_argument, NULL, 'r'},
{"schema-only", no_argument, NULL, 's'},
{"superuser", required_argument, NULL, 'S'},
{"tablespaces-only", no_argument, NULL, 't'},
{"username", required_argument, NULL, 'U'},
{"verbose", no_argument, NULL, 'v'},
{"no-password", no_argument, NULL, 'w'},
{"password", no_argument, NULL, 'W'},
{"no-privileges", no_argument, NULL, 'x'},
{"no-acl", no_argument, NULL, 'x'},
/*
* the following options don't have an equivalent short option letter
*/
{"attribute-inserts", no_argument, &column_inserts, 1},
{"binary-upgrade", no_argument, &binary_upgrade, 1},
{"column-inserts", no_argument, &column_inserts, 1},
{"disable-dollar-quoting", no_argument, &disable_dollar_quoting, 1},
{"disable-triggers", no_argument, &disable_triggers, 1},
{"exclude-database", required_argument, NULL, 6},
{"extra-float-digits", required_argument, NULL, 5},
{"if-exists", no_argument, &if_exists, 1},
{"inserts", no_argument, &inserts, 1},
{"lock-wait-timeout", required_argument, NULL, 2},
{"no-tablespaces", no_argument, &no_tablespaces, 1},
{"quote-all-identifiers", no_argument, &quote_all_identifiers, 1},
{"load-via-partition-root", no_argument, &load_via_partition_root, 1},
{"role", required_argument, NULL, 3},
{"use-set-session-authorization", no_argument, &use_setsessauth, 1},
{"no-comments", no_argument, &no_comments, 1},
{"no-publications", no_argument, &no_publications, 1},
{"no-role-passwords", no_argument, &no_role_passwords, 1},
{"no-security-labels", no_argument, &no_security_labels, 1},
{"no-subscriptions", no_argument, &no_subscriptions, 1},
{"no-sync", no_argument, NULL, 4},
{"no-unlogged-table-data", no_argument, &no_unlogged_table_data, 1},
{"on-conflict-do-nothing", no_argument, &on_conflict_do_nothing, 1},
{"rows-per-insert", required_argument, NULL, 7},
{NULL, 0, NULL, 0}
};
char *pghost = NULL;
char *pgport = NULL;
char *pguser = NULL;
char *pgdb = NULL;
char *use_role = NULL;
const char *dumpencoding = NULL;
trivalue prompt_password = TRI_DEFAULT;
bool data_only = false;
bool globals_only = false;
bool roles_only = false;
bool tablespaces_only = false;
PGconn *conn;
int encoding;
const char *std_strings;
int c,
ret;
int optindex;
pg_logging_init(argv[0]);
pg_logging_set_level(PG_LOG_WARNING);
set_pglocale_pgservice(argv[0], PG_TEXTDOMAIN("pg_dump"));
progname = get_progname(argv[0]);
if (argc > 1)
{
if (strcmp(argv[1], "--help") == 0 || strcmp(argv[1], "-?") == 0)
{
help();
exit_nicely(0);
}
if (strcmp(argv[1], "--version") == 0 || strcmp(argv[1], "-V") == 0)
{
puts("pg_dumpall (PostgreSQL) " PG_VERSION);
exit_nicely(0);
}
}
if ((ret = find_other_exec(argv[0], "pg_dump", PGDUMP_VERSIONSTR,
pg_dump_bin)) < 0)
{
char full_path[MAXPGPATH];
if (find_my_exec(argv[0], full_path) < 0)
strlcpy(full_path, progname, sizeof(full_path));
if (ret == -1)
pg_log_error("The program \"pg_dump\" is needed by %s but was not found in the\n"
"same directory as \"%s\".\n"
"Check your installation.",
progname, full_path);
else
pg_log_error("The program \"pg_dump\" was found by \"%s\"\n"
"but was not the same version as %s.\n"
"Check your installation.",
full_path, progname);
exit_nicely(1);
}
pgdumpopts = createPQExpBuffer();
while ((c = getopt_long(argc, argv, "acd:E:f:gh:l:Op:rsS:tU:vwWx", long_options, &optindex)) != -1)
{
switch (c)
{
case 'a':
data_only = true;
appendPQExpBufferStr(pgdumpopts, " -a");
break;
case 'c':
output_clean = true;
break;
case 'd':
connstr = pg_strdup(optarg);
break;
case 'E':
dumpencoding = pg_strdup(optarg);
appendPQExpBufferStr(pgdumpopts, " -E ");
appendShellString(pgdumpopts, optarg);
break;
case 'f':
filename = pg_strdup(optarg);
appendPQExpBufferStr(pgdumpopts, " -f ");
appendShellString(pgdumpopts, filename);
break;
case 'g':
globals_only = true;
break;
case 'h':
pghost = pg_strdup(optarg);
break;
case 'l':
pgdb = pg_strdup(optarg);
break;
case 'O':
appendPQExpBufferStr(pgdumpopts, " -O");
break;
case 'p':
pgport = pg_strdup(optarg);
break;
case 'r':
roles_only = true;
break;
case 's':
appendPQExpBufferStr(pgdumpopts, " -s");
break;
case 'S':
appendPQExpBufferStr(pgdumpopts, " -S ");
appendShellString(pgdumpopts, optarg);
break;
case 't':
tablespaces_only = true;
break;
case 'U':
pguser = pg_strdup(optarg);
break;
case 'v':
verbose = true;
pg_logging_set_level(PG_LOG_INFO);
appendPQExpBufferStr(pgdumpopts, " -v");
break;
case 'w':
prompt_password = TRI_NO;
appendPQExpBufferStr(pgdumpopts, " -w");
break;
case 'W':
prompt_password = TRI_YES;
appendPQExpBufferStr(pgdumpopts, " -W");
break;
case 'x':
skip_acls = true;
appendPQExpBufferStr(pgdumpopts, " -x");
break;
case 0:
break;
case 2:
appendPQExpBufferStr(pgdumpopts, " --lock-wait-timeout ");
appendShellString(pgdumpopts, optarg);
break;
case 3:
use_role = pg_strdup(optarg);
appendPQExpBufferStr(pgdumpopts, " --role ");
appendShellString(pgdumpopts, use_role);
break;
case 4:
dosync = false;
appendPQExpBufferStr(pgdumpopts, " --no-sync");
break;
case 5:
appendPQExpBufferStr(pgdumpopts, " --extra-float-digits ");
appendShellString(pgdumpopts, optarg);
break;
case 6:
simple_string_list_append(&database_exclude_patterns, optarg);
break;
case 7:
appendPQExpBufferStr(pgdumpopts, " --rows-per-insert ");
appendShellString(pgdumpopts, optarg);
break;
default:
fprintf(stderr, _("Try \"%s --help\" for more information.\n"), progname);
exit_nicely(1);
}
}
/* Complain if any arguments remain */
if (optind < argc)
{
pg_log_error("too many command-line arguments (first is \"%s\")",
argv[optind]);
fprintf(stderr, _("Try \"%s --help\" for more information.\n"),
progname);
exit_nicely(1);
}
if (database_exclude_patterns.head != NULL &&
(globals_only || roles_only || tablespaces_only))
{
pg_log_error("option --exclude-database cannot be used together with -g/--globals-only, -r/--roles-only, or -t/--tablespaces-only");
fprintf(stderr, _("Try \"%s --help\" for more information.\n"),
progname);
exit_nicely(1);
}
/* Make sure the user hasn't specified a mix of globals-only options */
if (globals_only && roles_only)
{
pg_log_error("options -g/--globals-only and -r/--roles-only cannot be used together");
fprintf(stderr, _("Try \"%s --help\" for more information.\n"),
progname);
exit_nicely(1);
}
if (globals_only && tablespaces_only)
{
pg_log_error("options -g/--globals-only and -t/--tablespaces-only cannot be used together");
fprintf(stderr, _("Try \"%s --help\" for more information.\n"),
progname);
exit_nicely(1);
}
if (if_exists && !output_clean)
{
pg_log_error("option --if-exists requires option -c/--clean");
exit_nicely(1);
}
if (roles_only && tablespaces_only)
{
pg_log_error("options -r/--roles-only and -t/--tablespaces-only cannot be used together");
fprintf(stderr, _("Try \"%s --help\" for more information.\n"),
progname);
exit_nicely(1);
}
/*
* If password values are not required in the dump, switch to using
* pg_roles which is equally useful, just more likely to have unrestricted
* access than pg_authid.
*/
if (no_role_passwords)
sprintf(role_catalog, "%s", PG_ROLES);
else
sprintf(role_catalog, "%s", PG_AUTHID);
/* Add long options to the pg_dump argument list */
if (binary_upgrade)
appendPQExpBufferStr(pgdumpopts, " --binary-upgrade");
if (column_inserts)
appendPQExpBufferStr(pgdumpopts, " --column-inserts");
if (disable_dollar_quoting)
appendPQExpBufferStr(pgdumpopts, " --disable-dollar-quoting");
if (disable_triggers)
appendPQExpBufferStr(pgdumpopts, " --disable-triggers");
if (inserts)
appendPQExpBufferStr(pgdumpopts, " --inserts");
if (no_tablespaces)
appendPQExpBufferStr(pgdumpopts, " --no-tablespaces");
if (quote_all_identifiers)
appendPQExpBufferStr(pgdumpopts, " --quote-all-identifiers");
if (load_via_partition_root)
appendPQExpBufferStr(pgdumpopts, " --load-via-partition-root");
if (use_setsessauth)
appendPQExpBufferStr(pgdumpopts, " --use-set-session-authorization");
if (no_comments)
appendPQExpBufferStr(pgdumpopts, " --no-comments");
if (no_publications)
appendPQExpBufferStr(pgdumpopts, " --no-publications");
if (no_security_labels)
appendPQExpBufferStr(pgdumpopts, " --no-security-labels");
if (no_subscriptions)
appendPQExpBufferStr(pgdumpopts, " --no-subscriptions");
if (no_unlogged_table_data)
appendPQExpBufferStr(pgdumpopts, " --no-unlogged-table-data");
if (on_conflict_do_nothing)
appendPQExpBufferStr(pgdumpopts, " --on-conflict-do-nothing");
/*
* If there was a database specified on the command line, use that,
* otherwise try to connect to database "postgres", and failing that
* "template1". "postgres" is the preferred choice for 8.1 and later
* servers, but it usually will not exist on older ones.
*/
if (pgdb)
{
conn = connectDatabase(pgdb, connstr, pghost, pgport, pguser,
prompt_password, false);
if (!conn)
{
pg_log_error("could not connect to database \"%s\"", pgdb);
exit_nicely(1);
}
}
else
{
conn = connectDatabase("postgres", connstr, pghost, pgport, pguser,
prompt_password, false);
if (!conn)
conn = connectDatabase("template1", connstr, pghost, pgport, pguser,
prompt_password, true);
if (!conn)
{
pg_log_error("could not connect to databases \"postgres\" or \"template1\"\n"
"Please specify an alternative database.");
fprintf(stderr, _("Try \"%s --help\" for more information.\n"),
progname);
exit_nicely(1);
}
}
/*
* Get a list of database names that match the exclude patterns
*/
expand_dbname_patterns(conn, &database_exclude_patterns,
&database_exclude_names);
/*
* Open the output file if required, otherwise use stdout
*/
if (filename)
{
OPF = fopen(filename, PG_BINARY_W);
if (!OPF)
{
pg_log_error("could not open output file \"%s\": %m",
filename);
exit_nicely(1);
}
}
else
OPF = stdout;
/*
* Set the client encoding if requested.
*/
if (dumpencoding)
{
if (PQsetClientEncoding(conn, dumpencoding) < 0)
{
pg_log_error("invalid client encoding \"%s\" specified",
dumpencoding);
exit_nicely(1);
}
}
/*
* Get the active encoding and the standard_conforming_strings setting, so
* we know how to escape strings.
*/
encoding = PQclientEncoding(conn);
std_strings = PQparameterStatus(conn, "standard_conforming_strings");
if (!std_strings)
std_strings = "off";
/* Set the role if requested */
if (use_role && server_version >= 80100)
{
PQExpBuffer query = createPQExpBuffer();
appendPQExpBuffer(query, "SET ROLE %s", fmtId(use_role));
executeCommand(conn, query->data);
destroyPQExpBuffer(query);
}
/* Force quoting of all identifiers if requested. */
if (quote_all_identifiers && server_version >= 90100)
executeCommand(conn, "SET quote_all_identifiers = true");
fprintf(OPF, "--\n-- PostgreSQL database cluster dump\n--\n\n");
if (verbose)
dumpTimestamp("Started on");
/*
* We used to emit \connect postgres here, but that served no purpose
* other than to break things for installations without a postgres
* database. Everything we're restoring here is a global, so whichever
* database we're connected to at the moment is fine.
*/
/* Restore will need to write to the target cluster */
fprintf(OPF, "SET default_transaction_read_only = off;\n\n");
/* Replicate encoding and std_strings in output */
fprintf(OPF, "SET client_encoding = '%s';\n",
pg_encoding_to_char(encoding));
fprintf(OPF, "SET standard_conforming_strings = %s;\n", std_strings);
if (strcmp(std_strings, "off") == 0)
fprintf(OPF, "SET escape_string_warning = off;\n");
fprintf(OPF, "\n");
if (!data_only)
{
/*
* If asked to --clean, do that first. We can avoid detailed
* dependency analysis because databases never depend on each other,
* and tablespaces never depend on each other. Roles could have
* grants to each other, but DROP ROLE will clean those up silently.
*/
if (output_clean)
{
if (!globals_only && !roles_only && !tablespaces_only)
dropDBs(conn);
if (!roles_only && !no_tablespaces)
dropTablespaces(conn);
if (!tablespaces_only)
dropRoles(conn);
}
/*
* Now create objects as requested. Be careful that option logic here
* is the same as for drops above.
*/
if (!tablespaces_only)
{
/* Dump roles (users) */
dumpRoles(conn);
/* Dump role memberships --- need different method for pre-8.1 */
if (server_version >= 80100)
dumpRoleMembership(conn);
else
dumpGroups(conn);
}
/* Dump tablespaces */
if (!roles_only && !no_tablespaces)
dumpTablespaces(conn);
}
if (!globals_only && !roles_only && !tablespaces_only)
dumpDatabases(conn);
PQfinish(conn);
if (verbose)
dumpTimestamp("Completed on");
fprintf(OPF, "--\n-- PostgreSQL database cluster dump complete\n--\n\n");
if (filename)
{
fclose(OPF);
/* sync the resulting file, errors are not fatal */
if (dosync)
(void) fsync_fname(filename, false);
}
exit_nicely(0);
}
static void
help(void)
{
printf(_("%s extracts a PostgreSQL database cluster into an SQL script file.\n\n"), progname);
printf(_("Usage:\n"));
printf(_(" %s [OPTION]...\n"), progname);
printf(_("\nGeneral options:\n"));
printf(_(" -f, --file=FILENAME output file name\n"));
printf(_(" -v, --verbose verbose mode\n"));
printf(_(" -V, --version output version information, then exit\n"));
printf(_(" --lock-wait-timeout=TIMEOUT fail after waiting TIMEOUT for a table lock\n"));
printf(_(" -?, --help show this help, then exit\n"));
printf(_("\nOptions controlling the output content:\n"));
printf(_(" -a, --data-only dump only the data, not the schema\n"));
printf(_(" -c, --clean clean (drop) databases before recreating\n"));
printf(_(" -E, --encoding=ENCODING dump the data in encoding ENCODING\n"));
printf(_(" -g, --globals-only dump only global objects, no databases\n"));
printf(_(" -O, --no-owner skip restoration of object ownership\n"));
printf(_(" -r, --roles-only dump only roles, no databases or tablespaces\n"));
printf(_(" -s, --schema-only dump only the schema, no data\n"));
printf(_(" -S, --superuser=NAME superuser user name to use in the dump\n"));
printf(_(" -t, --tablespaces-only dump only tablespaces, no databases or roles\n"));
printf(_(" -x, --no-privileges do not dump privileges (grant/revoke)\n"));
printf(_(" --binary-upgrade for use by upgrade utilities only\n"));
printf(_(" --column-inserts dump data as INSERT commands with column names\n"));
printf(_(" --disable-dollar-quoting disable dollar quoting, use SQL standard quoting\n"));
printf(_(" --disable-triggers disable triggers during data-only restore\n"));
printf(_(" --exclude-database=PATTERN exclude databases whose name matches PATTERN\n"));
printf(_(" --extra-float-digits=NUM override default setting for extra_float_digits\n"));
printf(_(" --if-exists use IF EXISTS when dropping objects\n"));
printf(_(" --inserts dump data as INSERT commands, rather than COPY\n"));
printf(_(" --load-via-partition-root load partitions via the root table\n"));
printf(_(" --no-comments do not dump comments\n"));
printf(_(" --no-publications do not dump publications\n"));
printf(_(" --no-role-passwords do not dump passwords for roles\n"));
printf(_(" --no-security-labels do not dump security label assignments\n"));
printf(_(" --no-subscriptions do not dump subscriptions\n"));
printf(_(" --no-sync do not wait for changes to be written safely to disk\n"));
printf(_(" --no-tablespaces do not dump tablespace assignments\n"));
printf(_(" --no-unlogged-table-data do not dump unlogged table data\n"));
printf(_(" --on-conflict-do-nothing add ON CONFLICT DO NOTHING to INSERT commands\n"));
printf(_(" --quote-all-identifiers quote all identifiers, even if not key words\n"));
printf(_(" --rows-per-insert=NROWS number of rows per INSERT; implies --inserts\n"));
printf(_(" --use-set-session-authorization\n"
" use SET SESSION AUTHORIZATION commands instead of\n"
" ALTER OWNER commands to set ownership\n"));
printf(_("\nConnection options:\n"));
printf(_(" -d, --dbname=CONNSTR connect using connection string\n"));
printf(_(" -h, --host=HOSTNAME database server host or socket directory\n"));
printf(_(" -l, --database=DBNAME alternative default database\n"));
printf(_(" -p, --port=PORT database server port number\n"));
printf(_(" -U, --username=NAME connect as specified database user\n"));
printf(_(" -w, --no-password never prompt for password\n"));
printf(_(" -W, --password force password prompt (should happen automatically)\n"));
printf(_(" --role=ROLENAME do SET ROLE before dump\n"));
printf(_("\nIf -f/--file is not used, then the SQL script will be written to the standard\n"
"output.\n\n"));
printf(_("Report bugs to <%s>.\n"), PACKAGE_BUGREPORT);
}
/*
* Drop roles
*/
static void
dropRoles(PGconn *conn)
{
PQExpBuffer buf = createPQExpBuffer();
PGresult *res;
int i_rolname;
int i;
if (server_version >= 90600)
printfPQExpBuffer(buf,
"SELECT rolname "
"FROM %s "
"WHERE rolname !~ '^pg_' "
"ORDER BY 1", role_catalog);
else if (server_version >= 80100)
printfPQExpBuffer(buf,
"SELECT rolname "
"FROM %s "
"ORDER BY 1", role_catalog);
else
printfPQExpBuffer(buf,
"SELECT usename as rolname "
"FROM pg_shadow "
"UNION "
"SELECT groname as rolname "
"FROM pg_group "
"ORDER BY 1");
res = executeQuery(conn, buf->data);
i_rolname = PQfnumber(res, "rolname");
if (PQntuples(res) > 0)
fprintf(OPF, "--\n-- Drop roles\n--\n\n");
for (i = 0; i < PQntuples(res); i++)
{
const char *rolename;
rolename = PQgetvalue(res, i, i_rolname);
fprintf(OPF, "DROP ROLE %s%s;\n",
if_exists ? "IF EXISTS " : "",
fmtId(rolename));
}
PQclear(res);
destroyPQExpBuffer(buf);
fprintf(OPF, "\n\n");
}
/*
* Dump roles
*/
static void
dumpRoles(PGconn *conn)
{
PQExpBuffer buf = createPQExpBuffer();
PGresult *res;
int i_oid,
i_rolname,
i_rolsuper,
i_rolinherit,
i_rolcreaterole,
i_rolcreatedb,
i_rolcanlogin,
i_rolconnlimit,
i_rolpassword,
i_rolvaliduntil,
i_rolreplication,
i_rolbypassrls,
i_rolcomment,
i_is_current_user;
int i;
/* note: rolconfig is dumped later */
if (server_version >= 90600)
printfPQExpBuffer(buf,
"SELECT oid, rolname, rolsuper, rolinherit, "
"rolcreaterole, rolcreatedb, "
"rolcanlogin, rolconnlimit, rolpassword, "
"rolvaliduntil, rolreplication, rolbypassrls, "
"pg_catalog.shobj_description(oid, '%s') as rolcomment, "
"rolname = current_user AS is_current_user "
"FROM %s "
"WHERE rolname !~ '^pg_' "
"ORDER BY 2", role_catalog, role_catalog);
else if (server_version >= 90500)
printfPQExpBuffer(buf,
"SELECT oid, rolname, rolsuper, rolinherit, "
"rolcreaterole, rolcreatedb, "
"rolcanlogin, rolconnlimit, rolpassword, "
"rolvaliduntil, rolreplication, rolbypassrls, "
"pg_catalog.shobj_description(oid, '%s') as rolcomment, "
"rolname = current_user AS is_current_user "
"FROM %s "
"ORDER BY 2", role_catalog, role_catalog);
else if (server_version >= 90100)
printfPQExpBuffer(buf,
"SELECT oid, rolname, rolsuper, rolinherit, "
"rolcreaterole, rolcreatedb, "
"rolcanlogin, rolconnlimit, rolpassword, "
"rolvaliduntil, rolreplication, "
"false as rolbypassrls, "
"pg_catalog.shobj_description(oid, '%s') as rolcomment, "
"rolname = current_user AS is_current_user "
"FROM %s "
"ORDER BY 2", role_catalog, role_catalog);
else if (server_version >= 80200)
printfPQExpBuffer(buf,
"SELECT oid, rolname, rolsuper, rolinherit, "
"rolcreaterole, rolcreatedb, "
"rolcanlogin, rolconnlimit, rolpassword, "
"rolvaliduntil, false as rolreplication, "
"false as rolbypassrls, "
"pg_catalog.shobj_description(oid, '%s') as rolcomment, "
"rolname = current_user AS is_current_user "
"FROM %s "
"ORDER BY 2", role_catalog, role_catalog);
else if (server_version >= 80100)
printfPQExpBuffer(buf,
"SELECT oid, rolname, rolsuper, rolinherit, "
"rolcreaterole, rolcreatedb, "
"rolcanlogin, rolconnlimit, rolpassword, "
"rolvaliduntil, false as rolreplication, "
"false as rolbypassrls, "
"null as rolcomment, "
"rolname = current_user AS is_current_user "
"FROM %s "
"ORDER BY 2", role_catalog);
else
printfPQExpBuffer(buf,
"SELECT 0 as oid, usename as rolname, "
"usesuper as rolsuper, "
"true as rolinherit, "
"usesuper as rolcreaterole, "
"usecreatedb as rolcreatedb, "
"true as rolcanlogin, "
"-1 as rolconnlimit, "
"passwd as rolpassword, "
"valuntil as rolvaliduntil, "
"false as rolreplication, "
"false as rolbypassrls, "
"null as rolcomment, "
"usename = current_user AS is_current_user "
"FROM pg_shadow "
"UNION ALL "
"SELECT 0 as oid, groname as rolname, "
"false as rolsuper, "
"true as rolinherit, "
"false as rolcreaterole, "
"false as rolcreatedb, "
"false as rolcanlogin, "
"-1 as rolconnlimit, "
"null::text as rolpassword, "
"null::timestamptz as rolvaliduntil, "
"false as rolreplication, "
"false as rolbypassrls, "
"null as rolcomment, "
"false AS is_current_user "
"FROM pg_group "
"WHERE NOT EXISTS (SELECT 1 FROM pg_shadow "
" WHERE usename = groname) "
"ORDER BY 2");
res = executeQuery(conn, buf->data);
i_oid = PQfnumber(res, "oid");
i_rolname = PQfnumber(res, "rolname");
i_rolsuper = PQfnumber(res, "rolsuper");
i_rolinherit = PQfnumber(res, "rolinherit");
i_rolcreaterole = PQfnumber(res, "rolcreaterole");
i_rolcreatedb = PQfnumber(res, "rolcreatedb");
i_rolcanlogin = PQfnumber(res, "rolcanlogin");
i_rolconnlimit = PQfnumber(res, "rolconnlimit");
i_rolpassword = PQfnumber(res, "rolpassword");
i_rolvaliduntil = PQfnumber(res, "rolvaliduntil");
i_rolreplication = PQfnumber(res, "rolreplication");
i_rolbypassrls = PQfnumber(res, "rolbypassrls");
i_rolcomment = PQfnumber(res, "rolcomment");
i_is_current_user = PQfnumber(res, "is_current_user");
if (PQntuples(res) > 0)
fprintf(OPF, "--\n-- Roles\n--\n\n");
for (i = 0; i < PQntuples(res); i++)
{
const char *rolename;
Oid auth_oid;
auth_oid = atooid(PQgetvalue(res, i, i_oid));
rolename = PQgetvalue(res, i, i_rolname);
if (strncmp(rolename, "pg_", 3) == 0)
{
pg_log_warning("role name starting with \"pg_\" skipped (%s)",
rolename);
continue;
}
resetPQExpBuffer(buf);
if (binary_upgrade)
{
appendPQExpBufferStr(buf, "\n-- For binary upgrade, must preserve pg_authid.oid\n");
appendPQExpBuffer(buf,
"SELECT pg_catalog.binary_upgrade_set_next_pg_authid_oid('%u'::pg_catalog.oid);\n\n",
auth_oid);
}
/*
* We dump CREATE ROLE followed by ALTER ROLE to ensure that the role
* will acquire the right properties even if it already exists (ie, it
* won't hurt for the CREATE to fail). This is particularly important
* for the role we are connected as, since even with --clean we will
* have failed to drop it. binary_upgrade cannot generate any errors,
* so we assume the current role is already created.
*/
if (!binary_upgrade ||
strcmp(PQgetvalue(res, i, i_is_current_user), "f") == 0)
appendPQExpBuffer(buf, "CREATE ROLE %s;\n", fmtId(rolename));
appendPQExpBuffer(buf, "ALTER ROLE %s WITH", fmtId(rolename));
if (strcmp(PQgetvalue(res, i, i_rolsuper), "t") == 0)
appendPQExpBufferStr(buf, " SUPERUSER");
else
appendPQExpBufferStr(buf, " NOSUPERUSER");
if (strcmp(PQgetvalue(res, i, i_rolinherit), "t") == 0)
appendPQExpBufferStr(buf, " INHERIT");
else
appendPQExpBufferStr(buf, " NOINHERIT");
if (strcmp(PQgetvalue(res, i, i_rolcreaterole), "t") == 0)
appendPQExpBufferStr(buf, " CREATEROLE");
else
appendPQExpBufferStr(buf, " NOCREATEROLE");
if (strcmp(PQgetvalue(res, i, i_rolcreatedb), "t") == 0)
appendPQExpBufferStr(buf, " CREATEDB");
else
appendPQExpBufferStr(buf, " NOCREATEDB");
if (strcmp(PQgetvalue(res, i, i_rolcanlogin), "t") == 0)
appendPQExpBufferStr(buf, " LOGIN");
else
appendPQExpBufferStr(buf, " NOLOGIN");
if (strcmp(PQgetvalue(res, i, i_rolreplication), "t") == 0)
appendPQExpBufferStr(buf, " REPLICATION");
else
appendPQExpBufferStr(buf, " NOREPLICATION");
if (strcmp(PQgetvalue(res, i, i_rolbypassrls), "t") == 0)
appendPQExpBufferStr(buf, " BYPASSRLS");
else
appendPQExpBufferStr(buf, " NOBYPASSRLS");
if (strcmp(PQgetvalue(res, i, i_rolconnlimit), "-1") != 0)
appendPQExpBuffer(buf, " CONNECTION LIMIT %s",
PQgetvalue(res, i, i_rolconnlimit));
if (!PQgetisnull(res, i, i_rolpassword) && !no_role_passwords)
{
appendPQExpBufferStr(buf, " PASSWORD ");
appendStringLiteralConn(buf, PQgetvalue(res, i, i_rolpassword), conn);
}
if (!PQgetisnull(res, i, i_rolvaliduntil))
appendPQExpBuffer(buf, " VALID UNTIL '%s'",
PQgetvalue(res, i, i_rolvaliduntil));
appendPQExpBufferStr(buf, ";\n");
if (!no_comments && !PQgetisnull(res, i, i_rolcomment))
{
appendPQExpBuffer(buf, "COMMENT ON ROLE %s IS ", fmtId(rolename));
appendStringLiteralConn(buf, PQgetvalue(res, i, i_rolcomment), conn);
appendPQExpBufferStr(buf, ";\n");
}
if (!no_security_labels && server_version >= 90200)
buildShSecLabels(conn, "pg_authid", auth_oid,
"ROLE", rolename,
buf);
fprintf(OPF, "%s", buf->data);
}
/*
* Dump configuration settings for roles after all roles have been dumped.
* We do it this way because config settings for roles could mention the
* names of other roles.
*/
for (i = 0; i < PQntuples(res); i++)
dumpUserConfig(conn, PQgetvalue(res, i, i_rolname));
PQclear(res);
fprintf(OPF, "\n\n");
destroyPQExpBuffer(buf);
}
/*
* Dump role memberships. This code is used for 8.1 and later servers.
*
* Note: we expect dumpRoles already created all the roles, but there is
* no membership yet.
*/
static void
dumpRoleMembership(PGconn *conn)
{
PQExpBuffer buf = createPQExpBuffer();
PGresult *res;
int i;
printfPQExpBuffer(buf, "SELECT ur.rolname AS roleid, "
"um.rolname AS member, "
"a.admin_option, "
"ug.rolname AS grantor "
"FROM pg_auth_members a "
"LEFT JOIN %s ur on ur.oid = a.roleid "
"LEFT JOIN %s um on um.oid = a.member "
"LEFT JOIN %s ug on ug.oid = a.grantor "
"WHERE NOT (ur.rolname ~ '^pg_' AND um.rolname ~ '^pg_')"
"ORDER BY 1,2,3", role_catalog, role_catalog, role_catalog);
res = executeQuery(conn, buf->data);
if (PQntuples(res) > 0)
fprintf(OPF, "--\n-- Role memberships\n--\n\n");
for (i = 0; i < PQntuples(res); i++)
{
char *roleid = PQgetvalue(res, i, 0);
char *member = PQgetvalue(res, i, 1);
char *option = PQgetvalue(res, i, 2);
fprintf(OPF, "GRANT %s", fmtId(roleid));
fprintf(OPF, " TO %s", fmtId(member));
if (*option == 't')
fprintf(OPF, " WITH ADMIN OPTION");
/*
* We don't track the grantor very carefully in the backend, so cope
* with the possibility that it has been dropped.
*/
if (!PQgetisnull(res, i, 3))
{
char *grantor = PQgetvalue(res, i, 3);
fprintf(OPF, " GRANTED BY %s", fmtId(grantor));
}
fprintf(OPF, ";\n");
}
PQclear(res);
destroyPQExpBuffer(buf);
fprintf(OPF, "\n\n");
}
/*
* Dump group memberships from a pre-8.1 server. It's annoying that we
* can't share any useful amount of code with the post-8.1 case, but
* the catalog representations are too different.
*
* Note: we expect dumpRoles already created all the roles, but there is
* no membership yet.
*/
static void
dumpGroups(PGconn *conn)
{
PQExpBuffer buf = createPQExpBuffer();
PGresult *res;
int i;
res = executeQuery(conn,
"SELECT groname, grolist FROM pg_group ORDER BY 1");
if (PQntuples(res) > 0)
fprintf(OPF, "--\n-- Role memberships\n--\n\n");
for (i = 0; i < PQntuples(res); i++)
{
char *groname = PQgetvalue(res, i, 0);
char *grolist = PQgetvalue(res, i, 1);
PGresult *res2;
int j;
/*
* Array representation is {1,2,3} ... convert to (1,2,3)
*/
if (strlen(grolist) < 3)
continue;
grolist = pg_strdup(grolist);
grolist[0] = '(';
grolist[strlen(grolist) - 1] = ')';
printfPQExpBuffer(buf,
"SELECT usename FROM pg_shadow "
"WHERE usesysid IN %s ORDER BY 1",
grolist);
free(grolist);
res2 = executeQuery(conn, buf->data);
for (j = 0; j < PQntuples(res2); j++)
{
char *usename = PQgetvalue(res2, j, 0);
/*
* Don't try to grant a role to itself; can happen if old
* installation has identically named user and group.
*/
if (strcmp(groname, usename) == 0)
continue;
fprintf(OPF, "GRANT %s", fmtId(groname));
fprintf(OPF, " TO %s;\n", fmtId(usename));
}
PQclear(res2);
}
PQclear(res);
destroyPQExpBuffer(buf);
fprintf(OPF, "\n\n");
}
/*
* Drop tablespaces.
*/
static void
dropTablespaces(PGconn *conn)
{
PGresult *res;
int i;
/*
* Get all tablespaces except built-in ones (which we assume are named
* pg_xxx)
*/
res = executeQuery(conn, "SELECT spcname "
"FROM pg_catalog.pg_tablespace "
"WHERE spcname !~ '^pg_' "
"ORDER BY 1");
if (PQntuples(res) > 0)
fprintf(OPF, "--\n-- Drop tablespaces\n--\n\n");
for (i = 0; i < PQntuples(res); i++)
{
char *spcname = PQgetvalue(res, i, 0);
fprintf(OPF, "DROP TABLESPACE %s%s;\n",
if_exists ? "IF EXISTS " : "",
fmtId(spcname));
}
PQclear(res);
fprintf(OPF, "\n\n");
}
/*
* Dump tablespaces.
*/
static void
dumpTablespaces(PGconn *conn)
{
PGresult *res;
int i;
/*
* Get all tablespaces except built-in ones (which we assume are named
* pg_xxx)
*
* For the tablespace ACLs, as of 9.6, we extract both the positive (as
* spcacl) and negative (as rspcacl) ACLs, relative to the default ACL for
* tablespaces, which are then passed to buildACLCommands() below.
*
* See buildACLQueries() and buildACLCommands().
*
* The order in which privileges are in the ACL string (the order they
* have been GRANT'd in, which the backend maintains) must be preserved to
* ensure that GRANTs WITH GRANT OPTION and subsequent GRANTs based on
* those are dumped in the correct order.
*
* Note that we do not support initial privileges (pg_init_privs) on
* tablespaces, so this logic cannot make use of buildACLQueries().
*/
if (server_version >= 90600)
res = executeQuery(conn, "SELECT oid, spcname, "
"pg_catalog.pg_get_userbyid(spcowner) AS spcowner, "
"pg_catalog.pg_tablespace_location(oid), "
"(SELECT array_agg(acl ORDER BY row_n) FROM "
" (SELECT acl, row_n FROM "
" unnest(coalesce(spcacl,acldefault('t',spcowner))) "
" WITH ORDINALITY AS perm(acl,row_n) "
" WHERE NOT EXISTS ( "
" SELECT 1 "
" FROM unnest(acldefault('t',spcowner)) "
" AS init(init_acl) "
" WHERE acl = init_acl)) AS spcacls) "
" AS spcacl, "
"(SELECT array_agg(acl ORDER BY row_n) FROM "
" (SELECT acl, row_n FROM "
" unnest(acldefault('t',spcowner)) "
" WITH ORDINALITY AS initp(acl,row_n) "
" WHERE NOT EXISTS ( "
" SELECT 1 "
" FROM unnest(coalesce(spcacl,acldefault('t',spcowner))) "
" AS permp(orig_acl) "
" WHERE acl = orig_acl)) AS rspcacls) "
" AS rspcacl, "
"array_to_string(spcoptions, ', '),"
"pg_catalog.shobj_description(oid, 'pg_tablespace') "
"FROM pg_catalog.pg_tablespace "
"WHERE spcname !~ '^pg_' "
"ORDER BY 1");
else if (server_version >= 90200)
res = executeQuery(conn, "SELECT oid, spcname, "
"pg_catalog.pg_get_userbyid(spcowner) AS spcowner, "
"pg_catalog.pg_tablespace_location(oid), "
"spcacl, '' as rspcacl, "
"array_to_string(spcoptions, ', '),"
"pg_catalog.shobj_description(oid, 'pg_tablespace') "
"FROM pg_catalog.pg_tablespace "
"WHERE spcname !~ '^pg_' "
"ORDER BY 1");
else if (server_version >= 90000)
res = executeQuery(conn, "SELECT oid, spcname, "
"pg_catalog.pg_get_userbyid(spcowner) AS spcowner, "
"spclocation, spcacl, '' as rspcacl, "
"array_to_string(spcoptions, ', '),"
"pg_catalog.shobj_description(oid, 'pg_tablespace') "
"FROM pg_catalog.pg_tablespace "
"WHERE spcname !~ '^pg_' "
"ORDER BY 1");
else if (server_version >= 80200)
res = executeQuery(conn, "SELECT oid, spcname, "
"pg_catalog.pg_get_userbyid(spcowner) AS spcowner, "
"spclocation, spcacl, '' as rspcacl, null, "
"pg_catalog.shobj_description(oid, 'pg_tablespace') "
"FROM pg_catalog.pg_tablespace "
"WHERE spcname !~ '^pg_' "
"ORDER BY 1");
else
res = executeQuery(conn, "SELECT oid, spcname, "
"pg_catalog.pg_get_userbyid(spcowner) AS spcowner, "
"spclocation, spcacl, '' as rspcacl, "
"null, null "
"FROM pg_catalog.pg_tablespace "
"WHERE spcname !~ '^pg_' "
"ORDER BY 1");
if (PQntuples(res) > 0)
fprintf(OPF, "--\n-- Tablespaces\n--\n\n");
for (i = 0; i < PQntuples(res); i++)
{
PQExpBuffer buf = createPQExpBuffer();
Oid spcoid = atooid(PQgetvalue(res, i, 0));
char *spcname = PQgetvalue(res, i, 1);
char *spcowner = PQgetvalue(res, i, 2);
char *spclocation = PQgetvalue(res, i, 3);
char *spcacl = PQgetvalue(res, i, 4);
char *rspcacl = PQgetvalue(res, i, 5);
char *spcoptions = PQgetvalue(res, i, 6);
char *spccomment = PQgetvalue(res, i, 7);
char *fspcname;
/* needed for buildACLCommands() */
fspcname = pg_strdup(fmtId(spcname));
appendPQExpBuffer(buf, "CREATE TABLESPACE %s", fspcname);
appendPQExpBuffer(buf, " OWNER %s", fmtId(spcowner));
appendPQExpBufferStr(buf, " LOCATION ");
appendStringLiteralConn(buf, spclocation, conn);
appendPQExpBufferStr(buf, ";\n");
if (spcoptions && spcoptions[0] != '\0')
appendPQExpBuffer(buf, "ALTER TABLESPACE %s SET (%s);\n",
fspcname, spcoptions);
if (!skip_acls &&
!buildACLCommands(fspcname, NULL, NULL, "TABLESPACE",
spcacl, rspcacl,
spcowner, "", server_version, buf))
{
pg_log_error("could not parse ACL list (%s) for tablespace \"%s\"",
spcacl, spcname);
PQfinish(conn);
exit_nicely(1);
}
if (!no_comments && spccomment && spccomment[0] != '\0')
{
appendPQExpBuffer(buf, "COMMENT ON TABLESPACE %s IS ", fspcname);
appendStringLiteralConn(buf, spccomment, conn);
appendPQExpBufferStr(buf, ";\n");
}
if (!no_security_labels && server_version >= 90200)
buildShSecLabels(conn, "pg_tablespace", spcoid,
"TABLESPACE", spcname,
buf);
fprintf(OPF, "%s", buf->data);
free(fspcname);
destroyPQExpBuffer(buf);
}
PQclear(res);
fprintf(OPF, "\n\n");
}
/*
* Dump commands to drop each database.
*/
static void
dropDBs(PGconn *conn)
{
PGresult *res;
int i;
/*
* Skip databases marked not datallowconn, since we'd be unable to connect
* to them anyway. This must agree with dumpDatabases().
*/
res = executeQuery(conn,
"SELECT datname "
"FROM pg_database d "
"WHERE datallowconn "
"ORDER BY datname");
if (PQntuples(res) > 0)
fprintf(OPF, "--\n-- Drop databases (except postgres and template1)\n--\n\n");
for (i = 0; i < PQntuples(res); i++)
{
char *dbname = PQgetvalue(res, i, 0);
/*
* Skip "postgres" and "template1"; dumpDatabases() will deal with
* them specially. Also, be sure to skip "template0", even if for
* some reason it's not marked !datallowconn.
*/
if (strcmp(dbname, "template1") != 0 &&
strcmp(dbname, "template0") != 0 &&
strcmp(dbname, "postgres") != 0)
{
fprintf(OPF, "DROP DATABASE %s%s;\n",
if_exists ? "IF EXISTS " : "",
fmtId(dbname));
}
}
PQclear(res);
fprintf(OPF, "\n\n");
}
/*
* Dump user-specific configuration
*/
static void
dumpUserConfig(PGconn *conn, const char *username)
{
PQExpBuffer buf = createPQExpBuffer();
int count = 1;
bool first = true;
for (;;)
{
PGresult *res;
if (server_version >= 90000)
printfPQExpBuffer(buf, "SELECT setconfig[%d] FROM pg_db_role_setting WHERE "
"setdatabase = 0 AND setrole = "
"(SELECT oid FROM %s WHERE rolname = ", count, role_catalog);
else if (server_version >= 80100)
printfPQExpBuffer(buf, "SELECT rolconfig[%d] FROM %s WHERE rolname = ", count, role_catalog);
else
printfPQExpBuffer(buf, "SELECT useconfig[%d] FROM pg_shadow WHERE usename = ", count);
appendStringLiteralConn(buf, username, conn);
if (server_version >= 90000)
appendPQExpBufferChar(buf, ')');
res = executeQuery(conn, buf->data);
if (PQntuples(res) == 1 &&
!PQgetisnull(res, 0, 0))
{
/* comment at section start, only if needed */
if (first)
{
fprintf(OPF, "--\n-- User Configurations\n--\n\n");
first = false;
}
fprintf(OPF, "--\n-- User Config \"%s\"\n--\n\n", username);
resetPQExpBuffer(buf);
makeAlterConfigCommand(conn, PQgetvalue(res, 0, 0),
"ROLE", username, NULL, NULL,
buf);
fprintf(OPF, "%s", buf->data);
PQclear(res);
count++;
}
else
{
PQclear(res);
break;
}
}
destroyPQExpBuffer(buf);
}
/*
* Find a list of database names that match the given patterns.
* See also expand_table_name_patterns() in pg_dump.c
*/
static void
expand_dbname_patterns(PGconn *conn,
SimpleStringList *patterns,
SimpleStringList *names)
{
PQExpBuffer query;
PGresult *res;
if (patterns->head == NULL)
return; /* nothing to do */
query = createPQExpBuffer();
/*
* The loop below runs multiple SELECTs, which might sometimes result in
* duplicate entries in the name list, but we don't care, since all we're
* going to do is test membership of the list.
*/
for (SimpleStringListCell *cell = patterns->head; cell; cell = cell->next)
{
appendPQExpBufferStr(query,
"SELECT datname FROM pg_catalog.pg_database n\n");
processSQLNamePattern(conn, query, cell->val, false,
false, NULL, "datname", NULL, NULL);
res = executeQuery(conn, query->data);
for (int i = 0; i < PQntuples(res); i++)
{
simple_string_list_append(names, PQgetvalue(res, i, 0));
}
PQclear(res);
resetPQExpBuffer(query);
}
destroyPQExpBuffer(query);
}
/*
* Dump contents of databases.
*/
static void
dumpDatabases(PGconn *conn)
{
PGresult *res;
int i;
/*
* Skip databases marked not datallowconn, since we'd be unable to connect
* to them anyway. This must agree with dropDBs().
*
* We arrange for template1 to be processed first, then we process other
* DBs in alphabetical order. If we just did them all alphabetically, we
* might find ourselves trying to drop the "postgres" database while still
* connected to it. This makes trying to run the restore script while
* connected to "template1" a bad idea, but there's no fixed order that
* doesn't have some failure mode with --clean.
*/
res = executeQuery(conn,
"SELECT datname "
"FROM pg_database d "
"WHERE datallowconn "
"ORDER BY (datname <> 'template1'), datname");
if (PQntuples(res) > 0)
fprintf(OPF, "--\n-- Databases\n--\n\n");
for (i = 0; i < PQntuples(res); i++)
{
char *dbname = PQgetvalue(res, i, 0);
const char *create_opts;
int ret;
/* Skip template0, even if it's not marked !datallowconn. */
if (strcmp(dbname, "template0") == 0)
continue;
/* Skip any explicitly excluded database */
if (simple_string_list_member(&database_exclude_names, dbname))
{
pg_log_info("excluding database \"%s\"", dbname);
continue;
}
pg_log_info("dumping database \"%s\"", dbname);
fprintf(OPF, "--\n-- Database \"%s\" dump\n--\n\n", dbname);
/*
* We assume that "template1" and "postgres" already exist in the
* target installation. dropDBs() won't have removed them, for fear
* of removing the DB the restore script is initially connected to. If
* --clean was specified, tell pg_dump to drop and recreate them;
* otherwise we'll merely restore their contents. Other databases
* should simply be created.
*/
if (strcmp(dbname, "template1") == 0 || strcmp(dbname, "postgres") == 0)
{
if (output_clean)
create_opts = "--clean --create";
else
{
create_opts = "";
/* Since pg_dump won't emit a \connect command, we must */
fprintf(OPF, "\\connect %s\n\n", dbname);
}
}
else
create_opts = "--create";
if (filename)
fclose(OPF);
ret = runPgDump(dbname, create_opts);
if (ret != 0)
{
pg_log_error("pg_dump failed on database \"%s\", exiting", dbname);
exit_nicely(1);
}
if (filename)
{
OPF = fopen(filename, PG_BINARY_A);
if (!OPF)
{
pg_log_error("could not re-open the output file \"%s\": %m",
filename);
exit_nicely(1);
}
}
}
PQclear(res);
}
/*
* Run pg_dump on dbname, with specified options.
*/
static int
runPgDump(const char *dbname, const char *create_opts)
{
PQExpBuffer connstrbuf = createPQExpBuffer();
PQExpBuffer cmd = createPQExpBuffer();
int ret;
appendPQExpBuffer(cmd, "\"%s\" %s %s", pg_dump_bin,
pgdumpopts->data, create_opts);
/*
* If we have a filename, use the undocumented plain-append pg_dump
* format.
*/
if (filename)
appendPQExpBufferStr(cmd, " -Fa ");
else
appendPQExpBufferStr(cmd, " -Fp ");
/*
* Append the database name to the already-constructed stem of connection
* string.
*/
appendPQExpBuffer(connstrbuf, "%s dbname=", connstr);
appendConnStrVal(connstrbuf, dbname);
appendShellString(cmd, connstrbuf->data);
pg_log_info("running \"%s\"", cmd->data);
fflush(stdout);
fflush(stderr);
ret = system(cmd->data);
destroyPQExpBuffer(cmd);
destroyPQExpBuffer(connstrbuf);
return ret;
}
/*
* buildShSecLabels
*
* Build SECURITY LABEL command(s) for a shared object
*
* The caller has to provide object type and identity in two separate formats:
* catalog_name (e.g., "pg_database") and object OID, as well as
* type name (e.g., "DATABASE") and object name (not pre-quoted).
*
* The command(s) are appended to "buffer".
*/
static void
buildShSecLabels(PGconn *conn, const char *catalog_name, Oid objectId,
const char *objtype, const char *objname,
PQExpBuffer buffer)
{
PQExpBuffer sql = createPQExpBuffer();
PGresult *res;
buildShSecLabelQuery(conn, catalog_name, objectId, sql);
res = executeQuery(conn, sql->data);
emitShSecLabels(conn, res, buffer, objtype, objname);
PQclear(res);
destroyPQExpBuffer(sql);
}
/*
* Make a database connection with the given parameters. An
* interactive password prompt is automatically issued if required.
*
* If fail_on_error is false, we return NULL without printing any message
* on failure, but preserve any prompted password for the next try.
*
* On success, the global variable 'connstr' is set to a connection string
* containing the options used.
*/
static PGconn *
connectDatabase(const char *dbname, const char *connection_string,
const char *pghost, const char *pgport, const char *pguser,
trivalue prompt_password, bool fail_on_error)
{
PGconn *conn;
bool new_pass;
const char *remoteversion_str;
int my_version;
const char **keywords = NULL;
const char **values = NULL;
PQconninfoOption *conn_opts = NULL;
static bool have_password = false;
static char password[100];
if (prompt_password == TRI_YES && !have_password)
{
simple_prompt("Password: ", password, sizeof(password), false);
have_password = true;
}
/*
* Start the connection. Loop until we have a password if requested by
* backend.
*/
do
{
int argcount = 6;
PQconninfoOption *conn_opt;
char *err_msg = NULL;
int i = 0;
if (keywords)
free(keywords);
if (values)
free(values);
if (conn_opts)
PQconninfoFree(conn_opts);
/*
* Merge the connection info inputs given in form of connection string
* and other options. Explicitly discard any dbname value in the
* connection string; otherwise, PQconnectdbParams() would interpret
* that value as being itself a connection string.
*/
if (connection_string)
{
conn_opts = PQconninfoParse(connection_string, &err_msg);
if (conn_opts == NULL)
{
pg_log_error("%s", err_msg);
exit_nicely(1);
}
for (conn_opt = conn_opts; conn_opt->keyword != NULL; conn_opt++)
{
if (conn_opt->val != NULL && conn_opt->val[0] != '\0' &&
strcmp(conn_opt->keyword, "dbname") != 0)
argcount++;
}
keywords = pg_malloc0((argcount + 1) * sizeof(*keywords));
values = pg_malloc0((argcount + 1) * sizeof(*values));
for (conn_opt = conn_opts; conn_opt->keyword != NULL; conn_opt++)
{
if (conn_opt->val != NULL && conn_opt->val[0] != '\0' &&
strcmp(conn_opt->keyword, "dbname") != 0)
{
keywords[i] = conn_opt->keyword;
values[i] = conn_opt->val;
i++;
}
}
}
else
{
keywords = pg_malloc0((argcount + 1) * sizeof(*keywords));
values = pg_malloc0((argcount + 1) * sizeof(*values));
}
if (pghost)
{
keywords[i] = "host";
values[i] = pghost;
i++;
}
if (pgport)
{
keywords[i] = "port";
values[i] = pgport;
i++;
}
if (pguser)
{
keywords[i] = "user";
values[i] = pguser;
i++;
}
if (have_password)
{
keywords[i] = "password";
values[i] = password;
i++;
}
if (dbname)
{
keywords[i] = "dbname";
values[i] = dbname;
i++;
}
keywords[i] = "fallback_application_name";
values[i] = progname;
i++;
new_pass = false;
conn = PQconnectdbParams(keywords, values, true);
if (!conn)
{
pg_log_error("could not connect to database \"%s\"", dbname);
exit_nicely(1);
}
if (PQstatus(conn) == CONNECTION_BAD &&
PQconnectionNeedsPassword(conn) &&
!have_password &&
prompt_password != TRI_NO)
{
PQfinish(conn);
simple_prompt("Password: ", password, sizeof(password), false);
have_password = true;
new_pass = true;
}
} while (new_pass);
/* check to see that the backend connection was successfully made */
if (PQstatus(conn) == CONNECTION_BAD)
{
if (fail_on_error)
{
pg_log_error("could not connect to database \"%s\": %s",
dbname, PQerrorMessage(conn));
exit_nicely(1);
}
else
{
PQfinish(conn);
free(keywords);
free(values);
PQconninfoFree(conn_opts);
return NULL;
}
}
/*
* Ok, connected successfully. Remember the options used, in the form of a
* connection string.
*/
connstr = constructConnStr(keywords, values);
free(keywords);
free(values);
PQconninfoFree(conn_opts);
/* Check version */
remoteversion_str = PQparameterStatus(conn, "server_version");
if (!remoteversion_str)
{
pg_log_error("could not get server version");
exit_nicely(1);
}
server_version = PQserverVersion(conn);
if (server_version == 0)
{
pg_log_error("could not parse server version \"%s\"",
remoteversion_str);
exit_nicely(1);
}
my_version = PG_VERSION_NUM;
/*
* We allow the server to be back to 8.0, and up to any minor release of
* our own major version. (See also version check in pg_dump.c.)
*/
if (my_version != server_version
&& (server_version < 80000 ||
(server_version / 100) > (my_version / 100)))
{
pg_log_error("server version: %s; %s version: %s",
remoteversion_str, progname, PG_VERSION);
pg_log_error("aborting because of server version mismatch");
exit_nicely(1);
}
PQclear(executeQuery(conn, ALWAYS_SECURE_SEARCH_PATH_SQL));
return conn;
}
/* ----------
* Construct a connection string from the given keyword/value pairs. It is
* used to pass the connection options to the pg_dump subprocess.
*
* The following parameters are excluded:
* dbname - varies in each pg_dump invocation
* password - it's not secure to pass a password on the command line
* fallback_application_name - we'll let pg_dump set it
* ----------
*/
static char *
constructConnStr(const char **keywords, const char **values)
{
PQExpBuffer buf = createPQExpBuffer();
char *connstr;
int i;
bool firstkeyword = true;
/* Construct a new connection string in key='value' format. */
for (i = 0; keywords[i] != NULL; i++)
{
if (strcmp(keywords[i], "dbname") == 0 ||
strcmp(keywords[i], "password") == 0 ||
strcmp(keywords[i], "fallback_application_name") == 0)
continue;
if (!firstkeyword)
appendPQExpBufferChar(buf, ' ');
firstkeyword = false;
appendPQExpBuffer(buf, "%s=", keywords[i]);
appendConnStrVal(buf, values[i]);
}
connstr = pg_strdup(buf->data);
destroyPQExpBuffer(buf);
return connstr;
}
/*
* Run a query, return the results, exit program on failure.
*/
static PGresult *
executeQuery(PGconn *conn, const char *query)
{
PGresult *res;
pg_log_info("executing %s", query);
res = PQexec(conn, query);
if (!res ||
PQresultStatus(res) != PGRES_TUPLES_OK)
{
pg_log_error("query failed: %s", PQerrorMessage(conn));
pg_log_error("query was: %s", query);
PQfinish(conn);
exit_nicely(1);
}
return res;
}
/*
* As above for a SQL command (which returns nothing).
*/
static void
executeCommand(PGconn *conn, const char *query)
{
PGresult *res;
pg_log_info("executing %s", query);
res = PQexec(conn, query);
if (!res ||
PQresultStatus(res) != PGRES_COMMAND_OK)
{
pg_log_error("query failed: %s", PQerrorMessage(conn));
pg_log_error("query was: %s", query);
PQfinish(conn);
exit_nicely(1);
}
PQclear(res);
}
/*
* dumpTimestamp
*/
static void
dumpTimestamp(const char *msg)
{
char buf[64];
time_t now = time(NULL);
if (strftime(buf, sizeof(buf), PGDUMP_STRFTIME_FMT, localtime(&now)) != 0)
fprintf(OPF, "-- %s %s\n\n", msg, buf);
}
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