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Update psql for some features of new FE/BE protocol. There is a

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client-side AUTOCOMMIT mode now: '\set AUTOCOMMIT off' supports
SQL-spec commit behavior.  Get rid of LO_TRANSACTION hack --- the
LO operations just work now, using libpq's ability to track the
transaction status.  Add a VERBOSE variable to control verboseness
of error message display, and add a %T prompt-string code to show
current transaction-block status.  Superuser state display in the
prompt string correctly follows SET SESSION AUTHORIZATION commands.
Control-C works to get out of COPY IN state.
This commit is contained in:
Tom Lane 2003-06-28 00:12:40 +00:00
parent ea20397b79
commit f9ebf36970
14 changed files with 476 additions and 463 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

179
doc/src/sgml/ref/psql-ref.sgml
View File

@ -1,5 +1,5 @@
<!--
$Header: /cvsroot/pgsql/doc/src/sgml/ref/psql-ref.sgml,v 1.89 2003/05/14 03:26:00 tgl Exp $
$Header: /cvsroot/pgsql/doc/src/sgml/ref/psql-ref.sgml,v 1.90 2003/06/28 00:12:39 tgl Exp $
PostgreSQL documentation
-->
@ -1200,13 +1200,6 @@ Tue Oct 26 21:40:57 CEST 1999
<acronym>OID</acronym>.
</para>
</tip>
<note>
<para>
See the description of the <varname>LO_TRANSACTION</varname>
variable for important information concerning all large object
operations.
</para>
</note>
</listitem>
</varlistentry>
@ -1236,14 +1229,6 @@ lo_import 152801
on the local file system, rather than the server's user and file
system.
</para>
<note>
<para>
See the description of the <varname>LO_TRANSACTION</varname>
variable for important information concerning all large object
operations.
</para>
</note>
</listitem>
</varlistentry>
@ -1274,13 +1259,6 @@ lo_import 152801
<acronym>OID</acronym>.
</para>
</tip>
<note>
<para>
See the description of the <varname>LO_TRANSACTION</varname>
variable for important information concerning all large object
operations.
</para>
</note>
</listitem>
</varlistentry>
@ -1809,14 +1787,14 @@ bar
<para>
If you call <command>\set</command> without a second argument, the
variable is simply set, but has no value. To unset (or delete) a
variable is set, with an empty string as value. To unset (or delete) a
variable, use the command <command>\unset</command>.
</para>
<para>
<application>psql</application>'s internal variable names can
consist of letters, numbers, and underscores in any order and any
number of them. A number of regular variables are treated specially
number of them. A number of these variables are treated specially
by <application>psql</application>. They indicate certain option
settings that can be changed at run time by altering the value of
the variable or represent some state of the application. Although
@ -1825,10 +1803,47 @@ bar
really quickly. By convention, all specially treated variables
consist of all upper-case letters (and possibly numbers and
underscores). To ensure maximum compatibility in the future, avoid
such variables. A list of all specially treated variables follows.
using such variable names for your own purposes. A list of all specially
treated variables follows.
</para>
<variablelist>
<varlistentry>
<term><varname>AUTOCOMMIT</varname></term>
<listitem>
<para>
When <literal>on</> (the default), each SQL command is automatically
committed upon successful completion. To postpone commit in this
mode, you must enter a <command>BEGIN</> or <command>START
TRANSACTION</> SQL command. When <literal>off</> or unset, SQL
commands are not committed until you explicitly issue
<command>COMMIT</> or <command>END</>. The autocommit-off
mode works by issuing an implicit <command>BEGIN</> for you, just
before any command that is not already in a transaction block and
is not itself a <command>BEGIN</> or other transaction-control
command.
</para>
<note>
<para>
In autocommit-off mode, you must explicitly abandon any failed
transaction by entering <command>ABORT</> or <command>ROLLBACK</>.
Also keep in mind that if you exit the session
without committing, your work will be lost.
</para>
</note>
<note>
<para>
The autocommit-on mode is <productname>PostgreSQL</>'s traditional
behavior, but autocommit-off is closer to the SQL spec. If you
prefer autocommit-off, you may wish to set it in
your <filename>.psqlrc</filename> file.
</para>
</note>
</listitem>
</varlistentry>
<varlistentry>
<term><varname>DBNAME</varname></term>
<listitem>
@ -1846,11 +1861,11 @@ bar
<para>
If set to <literal>all</literal>, all lines
entered or from a script are written to the standard output
before they are parsed or executed. To specify this on program
before they are parsed or executed. To select this behavior on program
start-up, use the switch <option>-a</option>. If set to
<literal>queries</literal>,
<application>psql</application> merely prints all queries as
they are sent to the server. The option for this is
they are sent to the server. The switch for this is
<option>-e</option>.
</para>
</listitem>
@ -1863,10 +1878,10 @@ bar
When this variable is set and a backslash command queries the
database, the query is first shown. This way you can study the
<productname>PostgreSQL</productname> internals and provide
similar functionality in your own programs. If you set the
variable to the value <literal>noexec</literal>, the queries are
just shown but are not actually sent to the server and
executed.
similar functionality in your own programs. (To select this behavior
on program start-up, use the switch <option>-E</option>.) If you set
the variable to the value <literal>noexec</literal>, the queries are
just shown but are not actually sent to the server and executed.
</para>
</listitem>
</varlistentry>
@ -1962,39 +1977,6 @@ bar
</listitem>
</varlistentry>
<varlistentry>
<term><varname>LO_TRANSACTION</varname></term>
<listitem>
<para>
If you use the <productname>PostgreSQL</productname> large
object interface to specially store data that does not fit into
one row, all the operations must be contained in a transaction
block. (See the documentation of the large object interface for
more information.) Since <application>psql</application> has no
way to tell if you already have a transaction in progress when
you call one of its internal commands
(<command>\lo_export</command>, <command>\lo_import</command>,
<command>\lo_unlink</command>) it must take some arbitrary
action. This action could either be to roll back any transaction
that might already be in progress, or to commit any such
transaction, or to do nothing at all. In the last case you must
provide your own <command>BEGIN</command>/<command>COMMIT</command> block or the
results will be unpredictable (usually resulting in the desired
action's not being performed in any case).
</para>
<para>
To choose what you want to do you set this variable to one of
<literal>rollback</literal>, <literal>commit</literal>, or
<literal>nothing</literal>. The default is to roll back the
transaction. If you just want to load one or a few objects this
is fine. However, if you intend to transfer many large objects,
it might be advisable to provide one explicit transaction block
around all commands.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><varname>ON_ERROR_STOP</varname></term>
<listitem>
@ -2032,8 +2014,8 @@ bar
<term><varname>PROMPT3</varname></term>
<listitem>
<para>
These specify what the prompt <application>psql</application>
issues is supposed to look like. See <xref
These specify what the prompts <application>psql</application>
issues should look like. See <xref
linkend="APP-PSQL-prompting"
endterm="APP-PSQL-prompting-title"> below.
</para>
@ -2055,8 +2037,8 @@ bar
<term><varname>SINGLELINE</varname></term>
<listitem>
<para>
This variable is set by the command line option
<option>-S</option>. You can unset or reset it at run time.
This variable is equivalent to the command line option
<option>-S</option>.
</para>
</listitem>
</varlistentry>
@ -2082,6 +2064,17 @@ bar
</listitem>
</varlistentry>
<varlistentry>
<term><varname>VERBOSE</varname></term>
<listitem>
<para>
This variable can be set to the values <literal>default</>,
<literal>verbose</>, or <literal>terse</> to control the verbosity
of error reports.
</para>
</listitem>
</varlistentry>
</variablelist>
</refsect3>
@ -2123,7 +2116,7 @@ testdb=> <userinput>INSERT INTO my_table VALUES (:content);</userinput>
<programlisting>
testdb=> <userinput>\set content '\'' `sed -e "s/'/\\\\\\'/g" < my_file.txt` '\''</userinput>
</programlisting>
Observe the correct number of backslashes (6)! You can resolve it
Observe the correct number of backslashes (6)! It works
this way: After <application>psql</application> has parsed this
line, it passes <literal>sed -e "s/'/\\\'/g" < my_file.txt</literal>
to the shell. The shell will do its own thing inside the double
@ -2141,9 +2134,10 @@ testdb=> <userinput>\set content '\'' `sed -e "s/'/\\\\\\'/g" < my_file.txt` '\'
<para>
Since colons may legally appear in SQL commands, the following rule
applies: If the variable is not set, the character sequence
<quote>colon+name</quote> is not changed. In any case you can escape
a colon with a backslash to protect it from interpretation. (The
applies: the character sequence
<quote>:name</quote> is not changed unless <quote>name</> is the name
of a variable that is currently set. In any case you can escape
a colon with a backslash to protect it from substitution. (The
colon syntax for variables is standard <acronym>SQL</acronym> for
embedded query languages, such as <application>ECPG</application>.
The colon syntax for array slices and type casts are
@ -2171,7 +2165,7 @@ testdb=> <userinput>\set content '\'' `sed -e "s/'/\\\\\\'/g" < my_file.txt` '\'
</para>
<para>
The value of the respective prompt variable is printed literally,
The value of the selected prompt variable is printed literally,
except where a percent sign (<literal>%</literal>) is encountered.
Depending on the next character, certain other text is substituted
instead. Defined substitutions are:
@ -2243,7 +2237,20 @@ testdb=> <userinput>\set content '\'' `sed -e "s/'/\\\\\\'/g" < my_file.txt` '\'
<application>psql</application> expects more input because the
command wasn't terminated yet, because you are inside a
<literal>/* ... */</literal> comment, or because you are inside
a quote. In prompt 3 the sequence doesn't resolve to anything.
a quote. In prompt 3 the sequence doesn't produce anything.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>%T</literal></term>
<listitem>
<para>
Transaction status: an empty string when not in a transaction
block, or <literal>*</> when in a transaction block, or
<literal>!</> when in a failed transaction block, or <literal>?</>
when the transaction state is indeterminate (for example, because
there is no connection).
</para>
</listitem>
</varlistentry>
@ -2252,13 +2259,12 @@ testdb=> <userinput>\set content '\'' `sed -e "s/'/\\\\\\'/g" < my_file.txt` '\'
<term><literal>%</literal><replaceable class="parameter">digits</replaceable></term>
<listitem>
<para>
The character with the indicated numeric code is substituted.
If <replaceable class="parameter">digits</replaceable> starts
with <literal>0x</literal> the rest of the characters are
interpreted as a hexadecimal digit and the character with the
corresponding code is substituted. If the first digit is
<literal>0</literal> the characters are interpreted as on octal
number and the corresponding character is substituted. Otherwise
a decimal number is assumed.
interpreted as hexadecimal; otherwise if the first digit is
<literal>0</literal> the digits are interpreted as octal;
otherwise the digits are read as a decimal number.
</para>
</listitem>
</varlistentry>
@ -2289,7 +2295,7 @@ testdb=> <userinput>\set content '\'' `sed -e "s/'/\\\\\\'/g" < my_file.txt` '\'
</variablelist>
To insert a percent sign into your prompt, write
<literal>%%</literal>. The default prompts are equivalent to
<literal>%%</literal>. The default prompts are
<literal>'%/%R%# '</literal> for prompts 1 and 2, and
<literal>'&gt;&gt; '</literal> for prompt 3.
</para>
@ -2473,17 +2479,6 @@ Field separator is "oo".
</para>
</listitem>
<listitem>
<para>
Pressing <keycombo action="simul"><keycap>Control</><keycap>C</></>
during a <quote>copy in</quote> (data sent to
the server) doesn't show the most ideal of behaviors. If you get a
message such as <errorname>COPY state must be terminated
first</errorname>, simply reset the connection by entering <literal>\c
- -</literal>.
</para>
</listitem>
</itemizedlist>
</refsect1>

4
doc/src/sgml/release.sgml
View File

@ -1,5 +1,5 @@
<!--
$Header: /cvsroot/pgsql/doc/src/sgml/release.sgml,v 1.194 2003/06/19 23:22:40 tgl Exp $
$Header: /cvsroot/pgsql/doc/src/sgml/release.sgml,v 1.195 2003/06/28 00:12:40 tgl Exp $
-->
<appendix id="release">
@ -31,7 +31,7 @@ Functional indexes have been generalized into expressional indexes
CHAR(n) to TEXT conversion automatically strips trailing blanks
Pattern matching operations can use indexes regardless of locale
New frontend/backend protocol supports many long-requested features
SET AUTOCOMMIT TO OFF is no longer supported
SET AUTOCOMMIT TO OFF is no longer supported; psql has an AUTOCOMMIT variable
Reimplementation of NUMERIC datatype for more speed
New regular expression package, many more regexp features (most of Perl5)
Can now do EXPLAIN ... EXECUTE to see plan used for a prepared query

118
src/bin/psql/command.c
View File

@ -3,7 +3,7 @@
*
* Copyright 2000-2002 by PostgreSQL Global Development Group
*
* $Header: /cvsroot/pgsql/src/bin/psql/command.c,v 1.96 2003/05/14 03:26:02 tgl Exp $
* $Header: /cvsroot/pgsql/src/bin/psql/command.c,v 1.97 2003/06/28 00:12:40 tgl Exp $
*/
#include "postgres_fe.h"
#include "command.h"
@ -457,20 +457,30 @@ exec_command(const char *cmd,
char *encoding = scan_option(&string, OT_NORMAL, NULL, false);
if (!encoding)
/* show encoding */
{
/* show encoding --- first check for change sent from server */
if (pset.encoding != PQclientEncoding(pset.db) &&
PQclientEncoding(pset.db) >= 0)
{
pset.encoding = PQclientEncoding(pset.db);
pset.popt.topt.encoding = pset.encoding;
SetVariable(pset.vars, "ENCODING",
pg_encoding_to_char(pset.encoding));
}
puts(pg_encoding_to_char(pset.encoding));
}
else
{
/* set encoding */
if (PQsetClientEncoding(pset.db, encoding) == -1)
psql_error("%s: invalid encoding name or conversion procedure not found\n", encoding);
else
{
/* save encoding info into psql internal data */
pset.encoding = PQclientEncoding(pset.db);
pset.popt.topt.encoding = PQclientEncoding(pset.db);
SetVariable(pset.vars, "ENCODING", pg_encoding_to_char(pset.encoding));
pset.popt.topt.encoding = pset.encoding;
SetVariable(pset.vars, "ENCODING",
pg_encoding_to_char(pset.encoding));
}
free(encoding);
}
@ -694,7 +704,13 @@ exec_command(const char *cmd,
free(opt);
}
if (!SetVariable(pset.vars, opt0, newval))
if (SetVariable(pset.vars, opt0, newval))
{
/* Check for special variables */
if (strcmp(opt0, "VERBOSE") == 0)
SyncVerboseVariable();
}
else
{
psql_error("\\%s: error\n", cmd);
success = false;
@ -1327,11 +1343,7 @@ do_connect(const char *new_dbname, const char *new_user)
bool success = false;
/* Delete variables (in case we fail before setting them anew) */
SetVariable(pset.vars, "DBNAME", NULL);
SetVariable(pset.vars, "USER", NULL);
SetVariable(pset.vars, "HOST", NULL);
SetVariable(pset.vars, "PORT", NULL);
SetVariable(pset.vars, "ENCODING", NULL);
UnsyncVariables();
/* If dbname is "" then use old name, else new one (even if NULL) */
if (oldconn && new_dbname && PQdb(oldconn) && strcmp(new_dbname, "") == 0)
@ -1429,51 +1441,75 @@ do_connect(const char *new_dbname, const char *new_user)
}
PQsetNoticeProcessor(pset.db, NoticeProcessor, NULL);
pset.encoding = PQclientEncoding(pset.db);
pset.popt.topt.encoding = PQclientEncoding(pset.db);
/* Update variables */
SyncVariables();
return success;
}
/*
* SyncVariables
*
* Make psql's internal variables agree with connection state upon
* establishing a new connection.
*/
void
SyncVariables(void)
{
/* get stuff from connection */
pset.encoding = PQclientEncoding(pset.db);
pset.popt.topt.encoding = pset.encoding;
SetVariable(pset.vars, "DBNAME", PQdb(pset.db));
SetVariable(pset.vars, "USER", PQuser(pset.db));
SetVariable(pset.vars, "HOST", PQhost(pset.db));
SetVariable(pset.vars, "PORT", PQport(pset.db));
SetVariable(pset.vars, "ENCODING", pg_encoding_to_char(pset.encoding));
pset.issuper = test_superuser(PQuser(pset.db));
return success;
/* send stuff to it, too */
SyncVerboseVariable();
}
/*
* Test if the given user is a database superuser.
* (Is used to set up the prompt right.)
* UnsyncVariables
*
* Clear variables that should be not be set when there is no connection.
*/
bool
test_superuser(const char *username)
void
UnsyncVariables(void)
{
PGresult *res;
PQExpBufferData buf;
bool answer;
if (!username)
return false;
initPQExpBuffer(&buf);
printfPQExpBuffer(&buf, "SELECT usesuper FROM pg_catalog.pg_user WHERE usename = '%s'", username);
res = PSQLexec(buf.data, true);
termPQExpBuffer(&buf);
answer =
(res && PQntuples(res) > 0 && PQnfields(res) > 0
&& !PQgetisnull(res, 0, 0)
&& PQgetvalue(res, 0, 0)
&& strcmp(PQgetvalue(res, 0, 0), "t") == 0);
PQclear(res);
return answer;
SetVariable(pset.vars, "DBNAME", NULL);
SetVariable(pset.vars, "USER", NULL);
SetVariable(pset.vars, "HOST", NULL);
SetVariable(pset.vars, "PORT", NULL);
SetVariable(pset.vars, "ENCODING", NULL);
}
/*
* Update connection state from VERBOSE variable
*/
void
SyncVerboseVariable(void)
{
switch (SwitchVariable(pset.vars, "VERBOSE",
"default", "terse", "verbose", NULL))
{
case 1: /* default */
PQsetErrorVerbosity(pset.db, PQERRORS_DEFAULT);
break;
case 2: /* terse */
PQsetErrorVerbosity(pset.db, PQERRORS_TERSE);
break;
case 3: /* verbose */
PQsetErrorVerbosity(pset.db, PQERRORS_VERBOSE);
break;
default: /* not set or unrecognized value */
PQsetErrorVerbosity(pset.db, PQERRORS_DEFAULT);
break;
}
}
/*

18
src/bin/psql/command.h
View File

@ -3,7 +3,7 @@
*
* Copyright 2000 by PostgreSQL Global Development Group
*
* $Header: /cvsroot/pgsql/src/bin/psql/command.h,v 1.14 2002/03/27 19:16:13 petere Exp $
* $Header: /cvsroot/pgsql/src/bin/psql/command.h,v 1.15 2003/06/28 00:12:40 tgl Exp $
*/
#ifndef COMMAND_H
#define COMMAND_H
@ -26,20 +26,22 @@ typedef enum _backslashResult
} backslashResult;
backslashResult HandleSlashCmds(const char *line,
extern backslashResult HandleSlashCmds(const char *line,
PQExpBuffer query_buf,
const char **end_of_cmd,
volatile int *paren_level);
int
process_file(char *filename);
extern int process_file(char *filename);
bool
test_superuser(const char *username);
bool do_pset(const char *param,
extern bool do_pset(const char *param,
const char *value,
printQueryOpt *popt,
bool quiet);
extern void SyncVariables(void);
extern void UnsyncVariables(void);
extern void SyncVerboseVariable(void);
#endif /* COMMAND_H */

180
src/bin/psql/common.c
View File

@ -3,11 +3,12 @@
*
* Copyright 2000 by PostgreSQL Global Development Group
*
* $Header: /cvsroot/pgsql/src/bin/psql/common.c,v 1.64 2003/06/12 08:15:28 momjian Exp $
* $Header: /cvsroot/pgsql/src/bin/psql/common.c,v 1.65 2003/06/28 00:12:40 tgl Exp $
*/
#include "postgres_fe.h"
#include "common.h"
#include <ctype.h>
#include <errno.h>
#include <stdarg.h>
#ifndef HAVE_STRDUP
@ -29,6 +30,7 @@
#include "settings.h"
#include "variables.h"
#include "command.h"
#include "copy.h"
#include "prompt.h"
#include "print.h"
@ -55,6 +57,10 @@ typedef struct _timeb TimevalStruct;
extern bool prompt_state;
static bool is_transact_command(const char *query);
/*
* "Safe" wrapper around strdup()
*/
@ -195,8 +201,8 @@ handle_sigint(SIGNAL_ARGS)
{
int save_errno = errno;
/* Don't muck around if copying in or prompting for a password. */
if ((copy_in_state && pset.cur_cmd_interactive) || prompt_state)
/* Don't muck around if prompting for a password. */
if (prompt_state)
return;
if (cancelConn == NULL)
@ -262,11 +268,7 @@ CheckConnection()
PQfinish(pset.db);
pset.db = NULL;
ResetCancelConn();
SetVariable(pset.vars, "DBNAME", NULL);
SetVariable(pset.vars, "HOST", NULL);
SetVariable(pset.vars, "PORT", NULL);
SetVariable(pset.vars, "USER", NULL);
SetVariable(pset.vars, "ENCODING", NULL);
UnsyncVariables();
}
else
fputs(gettext("Succeeded.\n"), stderr);
@ -304,8 +306,8 @@ void ResetCancelConn(void)
* AcceptResult
*
* Checks whether a result is valid, giving an error message if necessary;
* (re)sets copy_in_state and cancelConn as needed, and ensures that the
* connection to the backend is still up.
* resets cancelConn as needed, and ensures that the connection to the backend
* is still up.
*
* Returns true for valid result, false for error state.
*/
@ -322,12 +324,9 @@ AcceptResult(const PGresult *result)
}
else switch (PQresultStatus(result))
{
case PGRES_COPY_IN:
copy_in_state = true;
break;
case PGRES_COMMAND_OK:
case PGRES_TUPLES_OK:
case PGRES_COPY_IN:
/* Fine, do nothing */
break;
@ -358,18 +357,15 @@ AcceptResult(const PGresult *result)
* This is the way to send "backdoor" queries (those not directly entered
* by the user). It is subject to -E but not -e.
*
* If the given querystring generates multiple PGresults, normally the last
* one is returned to the caller. However, if ignore_command_ok is TRUE,
* then PGresults with status PGRES_COMMAND_OK are ignored. This is intended
* mainly to allow locutions such as "begin; select ...; commit".
* In autocommit-off mode, a new transaction block is started if start_xact
* is true; nothing special is done when start_xact is false. Typically,
* start_xact = false is used for SELECTs and explicit BEGIN/COMMIT commands.
*/
PGresult *
PSQLexec(const char *query, bool ignore_command_ok)
PSQLexec(const char *query, bool start_xact)
{
PGresult *res = NULL;
PGresult *newres;
PGresult *res;
int echo_hidden;
ExecStatusType rstatus;
if (!pset.db)
{
@ -378,50 +374,40 @@ PSQLexec(const char *query, bool ignore_command_ok)
}
echo_hidden = SwitchVariable(pset.vars, "ECHO_HIDDEN", "noexec", NULL);
if (echo_hidden != var_notset)
if (echo_hidden != VAR_NOTSET)
{
printf("********* QUERY **********\n"
"%s\n"
"**************************\n\n", query);
fflush(stdout);
if (echo_hidden == 1)
return NULL;
if (echo_hidden == 1) /* noexec? */
return NULL;
}
/* discard any uneaten results of past queries */
while ((newres = PQgetResult(pset.db)) != NULL)
PQclear(newres);
SetCancelConn();
if (!PQsendQuery(pset.db, query))
if (start_xact && PQtransactionStatus(pset.db) == PQTRANS_IDLE &&
!GetVariableBool(pset.vars, "AUTOCOMMIT"))
{
psql_error("%s", PQerrorMessage(pset.db));
ResetCancelConn();
return NULL;
}
rstatus = PGRES_EMPTY_QUERY;
while (rstatus != PGRES_COPY_IN &&
rstatus != PGRES_COPY_OUT &&
(newres = PQgetResult(pset.db)))
res = PQexec(pset.db, "BEGIN");
if (PQresultStatus(res) != PGRES_COMMAND_OK)
{
rstatus = PQresultStatus(newres);
if (!ignore_command_ok || rstatus != PGRES_COMMAND_OK)
{
PGresult *tempRes = res;
res = newres;
newres = tempRes;
psql_error("%s", PQerrorMessage(pset.db));
PQclear(res);
ResetCancelConn();
return NULL;
}
PQclear(newres);
PQclear(res);
}
res = PQexec(pset.db, query);
if (!AcceptResult(res) && res)
{
PQclear(res);
res = NULL;
}
}
return res;
}
@ -613,6 +599,21 @@ SendQuery(const char *query)
SetCancelConn();
if (PQtransactionStatus(pset.db) == PQTRANS_IDLE &&
!GetVariableBool(pset.vars, "AUTOCOMMIT") &&
!is_transact_command(query))
{
results = PQexec(pset.db, "BEGIN");
if (PQresultStatus(results) != PGRES_COMMAND_OK)
{
psql_error("%s", PQerrorMessage(pset.db));
PQclear(results);
ResetCancelConn();
return false;
}
PQclear(results);
}
if (pset.timing)
GETTIMEOFDAY(&before);
results = PQexec(pset.db, query);
@ -626,6 +627,68 @@ SendQuery(const char *query)
return OK;
}
/*
* check whether a query string begins with BEGIN/COMMIT/ROLLBACK/START XACT
*/
static bool
is_transact_command(const char *query)
{
int wordlen;
/*
* First we must advance over any whitespace and comments.
*/
while (*query)
{
if (isspace((unsigned char) *query))
query++;
else if (query[0] == '-' && query[1] == '-')
{
query += 2;
while (*query && *query != '\n')
query++;
}
else if (query[0] == '/' && query[1] == '*')
{
query += 2;
while (*query)
{
if (query[0] == '*' && query[1] == '/')
{
query += 2;
break;
}
else
query++;
}
}
else
break; /* found first token */
}
/*
* Check word length ("beginx" is not "begin").
*/
wordlen = 0;
while (isalpha((unsigned char) query[wordlen]))
wordlen++;
if (wordlen == 5 && strncasecmp(query, "begin", 5) == 0)
return true;
if (wordlen == 6 && strncasecmp(query, "commit", 6) == 0)
return true;
if (wordlen == 8 && strncasecmp(query, "rollback", 8) == 0)
return true;
if (wordlen == 5 && strncasecmp(query, "abort", 5) == 0)
return true;
if (wordlen == 3 && strncasecmp(query, "end", 3) == 0)
return true;
if (wordlen == 5 && strncasecmp(query, "start", 5) == 0)
return true;
return false;
}
char parse_char(char **buf)
{
@ -637,3 +700,24 @@ char parse_char(char **buf)
}
/*
* Test if the current user is a database superuser.
*
* Note: this will correctly detect superuserness only with a protocol-3.0
* or newer backend; otherwise it will always say "false".
*/
bool
is_superuser(void)
{
const char *val;
if (!pset.db)
return false;
val = PQparameterStatus(pset.db, "is_superuser");
if (val && strcmp(val, "on") == 0)
return true;
return false;
}

6
src/bin/psql/common.h
View File

@ -3,7 +3,7 @@
*
* Copyright 2000 by PostgreSQL Global Development Group
*
* $Header: /cvsroot/pgsql/src/bin/psql/common.h,v 1.25 2003/03/20 15:44:17 momjian Exp $
* $Header: /cvsroot/pgsql/src/bin/psql/common.h,v 1.26 2003/06/28 00:12:40 tgl Exp $
*/
#ifndef COMMON_H
#define COMMON_H
@ -34,10 +34,12 @@ extern void ResetCancelConn(void);
extern void handle_sigint(SIGNAL_ARGS);
#endif /* not WIN32 */
extern PGresult *PSQLexec(const char *query, bool ignore_command_ok);
extern PGresult *PSQLexec(const char *query, bool start_xact);
extern bool SendQuery(const char *query);
extern bool is_superuser(void);
/* sprompt.h */
extern char *simple_prompt(const char *prompt, int maxlen, bool echo);

11
src/bin/psql/copy.c
View File

@ -3,7 +3,7 @@
*
* Copyright 2000 by PostgreSQL Global Development Group
*
* $Header: /cvsroot/pgsql/src/bin/psql/copy.c,v 1.29 2003/03/20 06:00:12 momjian Exp $
* $Header: /cvsroot/pgsql/src/bin/psql/copy.c,v 1.30 2003/06/28 00:12:40 tgl Exp $
*/
#include "postgres_fe.h"
#include "copy.h"
@ -32,8 +32,6 @@
#define S_ISDIR(mode) __S_ISTYPE((mode), S_IFDIR)
#endif
bool copy_in_state;
/*
* parse_slash_copy
* -- parses \copy command line
@ -395,7 +393,7 @@ do_copy(const char *args)
return false;
}
result = PSQLexec(query.data, false);
result = PSQLexec(query.data, true);
termPQExpBuffer(&query);
switch (PQresultStatus(result))
@ -506,10 +504,6 @@ handleCopyIn(PGconn *conn, FILE *copystream, const char *prompt)
int ret;
unsigned int linecount = 0;
#ifdef USE_ASSERT_CHECKING
assert(copy_in_state);
#endif
if (prompt) /* disable prompt if not interactive */
{
if (!isatty(fileno(copystream)))
@ -563,7 +557,6 @@ handleCopyIn(PGconn *conn, FILE *copystream, const char *prompt)
linecount++;
}
ret = !PQendcopy(conn);
copy_in_state = false;
pset.lineno += linecount;
return ret;
}

3
src/bin/psql/copy.h
View File

@ -3,14 +3,13 @@
*
* Copyright 2000 by PostgreSQL Global Development Group
*
* $Header: /cvsroot/pgsql/src/bin/psql/copy.h,v 1.11 2001/10/28 06:25:58 momjian Exp $
* $Header: /cvsroot/pgsql/src/bin/psql/copy.h,v 1.12 2003/06/28 00:12:40 tgl Exp $
*/
#ifndef COPY_H
#define COPY_H
#include "libpq-fe.h"
extern bool copy_in_state;
/* handler for \copy */
bool do_copy(const char *args);

276
src/bin/psql/large_obj.c
View File

@ -3,7 +3,7 @@
*
* Copyright 2000-2002 by PostgreSQL Global Development Group
*
* $Header: /cvsroot/pgsql/src/bin/psql/large_obj.c,v 1.26 2003/06/27 16:55:23 tgl Exp $
* $Header: /cvsroot/pgsql/src/bin/psql/large_obj.c,v 1.27 2003/06/28 00:12:40 tgl Exp $
*/
#include "postgres_fe.h"
#include "large_obj.h"
@ -20,68 +20,93 @@
/*
* Since all large object ops must be in a transaction, we must do some magic
* here. You can set the variable lo_transaction to one of commit|rollback|
* nothing to get your favourite behaviour regarding any transaction in
* progress. Rollback is default.
* Prepare to do a large-object operation. We *must* be inside a transaction
* block for all these operations, so start one if needed.
*
* Returns TRUE if okay, FALSE if failed. *own_transaction is set to indicate
* if we started our own transaction or not.
*/
static char notice[80];
static void
_my_notice_handler(void *arg, const char *message)
{
(void) arg;
strncpy(notice, message, 79);
notice[79] = '\0';
}
static bool
handle_transaction(void)
start_lo_xact(const char *operation, bool *own_transaction)
{
PGTransactionStatusType tstatus;
PGresult *res;
bool commit = false;
PQnoticeProcessor old_notice_hook;
switch (SwitchVariable(pset.vars, "LO_TRANSACTION",
"nothing",
"commit",
NULL))
*own_transaction = false;
if (!pset.db)
{
case 1: /* nothing */
return true;
case 2: /* commit */
commit = true;
break;
}
notice[0] = '\0';
old_notice_hook = PQsetNoticeProcessor(pset.db, _my_notice_handler, NULL);
res = PSQLexec(commit ? "COMMIT" : "ROLLBACK", false);
if (!res)
psql_error("%s: not connected to a database\n", operation);
return false;
if (notice[0])
{
if ((!commit && strcmp(notice, "WARNING: ROLLBACK: no transaction in progress\n") != 0) ||
(commit && strcmp(notice, "WARNING: COMMIT: no transaction in progress\n") != 0))
fputs(notice, stderr);
}
else if (!QUIET())
{
if (commit)
puts(gettext("Warning: Your transaction in progress has been committed."));
else
puts(gettext("Warning: Your transaction in progress has been rolled back."));
}
PQsetNoticeProcessor(pset.db, old_notice_hook, NULL);
PQclear(res);
tstatus = PQtransactionStatus(pset.db);
switch (tstatus)
{
case PQTRANS_IDLE:
/* need to start our own xact */
if (!(res = PSQLexec("BEGIN", false)))
return false;
PQclear(res);
*own_transaction = true;
break;
case PQTRANS_INTRANS:
/* use the existing xact */
break;
case PQTRANS_INERROR:
psql_error("%s: current transaction is aborted\n", operation);
return false;
default:
psql_error("%s: unknown transaction status\n", operation);
return false;
}
return true;
}
/*
* Clean up after a successful LO operation
*/
static bool
finish_lo_xact(const char *operation, bool own_transaction)
{
PGresult *res;
if (own_transaction &&
GetVariableBool(pset.vars, "AUTOCOMMIT"))
{
/* close out our own xact */
if (!(res = PSQLexec("COMMIT", false)))
{
res = PSQLexec("ROLLBACK", false);
PQclear(res);
return false;
}
PQclear(res);
}
return true;
}
/*
* Clean up after a failed LO operation
*/
static bool
fail_lo_xact(const char *operation, bool own_transaction)
{
PGresult *res;
if (own_transaction &&
GetVariableBool(pset.vars, "AUTOCOMMIT"))
{
/* close out our own xact */
res = PSQLexec("ROLLBACK", false);
PQclear(res);
}
return false; /* always */
}
/*
@ -92,53 +117,22 @@ handle_transaction(void)
bool
do_lo_export(const char *loid_arg, const char *filename_arg)
{
PGresult *res;
int status;
bool own_transaction;
own_transaction = !VariableEquals(pset.vars, "LO_TRANSACTION", "nothing");
if (!pset.db)
{
psql_error("\\lo_export: not connected to a database\n");
if (!start_lo_xact("\\lo_export", &own_transaction))
return false;
}
if (own_transaction)
{
if (!handle_transaction())
return false;
if (!(res = PSQLexec("BEGIN", false)))
return false;
PQclear(res);
}
status = lo_export(pset.db, atooid(loid_arg), filename_arg);
if (status != 1)
{ /* of course this status is documented
* nowhere :( */
fputs(PQerrorMessage(pset.db), stderr);
if (own_transaction)
{
res = PQexec(pset.db, "ROLLBACK");
PQclear(res);
}
return fail_lo_xact("\\lo_export", own_transaction);
}
if (!finish_lo_xact("\\lo_export", own_transaction))
return false;
}
if (own_transaction)
{
if (!(res = PSQLexec("COMMIT", false)))
{
res = PQexec(pset.db, "ROLLBACK");
PQclear(res);
return false;
}
PQclear(res);
}
fprintf(pset.queryFout, "lo_export\n");
@ -146,7 +140,6 @@ do_lo_export(const char *loid_arg, const char *filename_arg)
}
/*
* do_lo_import()
*
@ -161,41 +154,20 @@ do_lo_import(const char *filename_arg, const char *comment_arg)
unsigned int i;
bool own_transaction;
own_transaction = !VariableEquals(pset.vars, "LO_TRANSACTION", "nothing");
if (!pset.db)
{
psql_error("\\lo_import: not connected to a database\n");
if (!start_lo_xact("\\lo_import", &own_transaction))
return false;
}
if (own_transaction)
{
if (!handle_transaction())
return false;
if (!(res = PSQLexec("BEGIN", false)))
return false;
PQclear(res);
}
loid = lo_import(pset.db, filename_arg);
if (loid == InvalidOid)
{
fputs(PQerrorMessage(pset.db), stderr);
if (own_transaction)
{
res = PQexec(pset.db, "ROLLBACK");
PQclear(res);
}
return false;
return fail_lo_xact("\\lo_import", own_transaction);
}
/* insert description if given */
/* XXX don't try to hack pg_description if not superuser */
/* XXX ought to replace this with some kind of COMMENT command */
if (comment_arg && pset.issuper)
if (comment_arg && is_superuser())
{
char *cmdbuf;
char *bufptr;
@ -203,14 +175,7 @@ do_lo_import(const char *filename_arg, const char *comment_arg)
cmdbuf = malloc(slen * 2 + 256);
if (!cmdbuf)
{
if (own_transaction)
{
res = PQexec(pset.db, "ROLLBACK");
PQclear(res);
}
return false;
}
return fail_lo_xact("\\lo_import", own_transaction);
sprintf(cmdbuf,
"INSERT INTO pg_catalog.pg_description VALUES ('%u', "
"'pg_catalog.pg_largeobject'::regclass, "
@ -227,31 +192,16 @@ do_lo_import(const char *filename_arg, const char *comment_arg)
if (!(res = PSQLexec(cmdbuf, false)))
{
if (own_transaction)
{
res = PQexec(pset.db, "ROLLBACK");
PQclear(res);
}
free(cmdbuf);
return false;
return fail_lo_xact("\\lo_import", own_transaction);
}
PQclear(res);
free(cmdbuf);
}
if (own_transaction)
{
if (!(res = PSQLexec("COMMIT", false)))
{
res = PQexec(pset.db, "ROLLBACK");
PQclear(res);
return false;
}
PQclear(res);
}
if (!finish_lo_xact("\\lo_import", own_transaction))
return false;
fprintf(pset.queryFout, "lo_import %u\n", loid);
sprintf(oidbuf, "%u", loid);
@ -261,7 +211,6 @@ do_lo_import(const char *filename_arg, const char *comment_arg)
}
/*
* do_lo_unlink()
*
@ -276,69 +225,32 @@ do_lo_unlink(const char *loid_arg)
char buf[256];
bool own_transaction;
own_transaction = !VariableEquals(pset.vars, "LO_TRANSACTION", "nothing");
if (!pset.db)
{
psql_error("\\lo_unlink: not connected to a database\n");
if (!start_lo_xact("\\lo_unlink", &own_transaction))
return false;
}
if (own_transaction)
{
if (!handle_transaction())
return false;
if (!(res = PSQLexec("BEGIN", false)))
return false;
PQclear(res);
}
status = lo_unlink(pset.db, loid);
if (status == -1)
{
fputs(PQerrorMessage(pset.db), stderr);
if (own_transaction)
{
res = PQexec(pset.db, "ROLLBACK");
PQclear(res);
}
return false;
return fail_lo_xact("\\lo_unlink", own_transaction);
}
/* remove the comment as well */
/* XXX don't try to hack pg_description if not superuser */
/* XXX ought to replace this with some kind of COMMENT command */
if (pset.issuper)
if (is_superuser())
{
snprintf(buf, sizeof(buf),
"DELETE FROM pg_catalog.pg_description WHERE objoid = '%u' "
"AND classoid = 'pg_catalog.pg_largeobject'::regclass",
loid);
if (!(res = PSQLexec(buf, false)))
{
if (own_transaction)
{
res = PQexec(pset.db, "ROLLBACK");
PQclear(res);
}
return false;
}
PQclear(res);
}
if (own_transaction)
{
if (!(res = PSQLexec("COMMIT", false)))
{
res = PQexec(pset.db, "ROLLBACK");
PQclear(res);
return false;
}
return fail_lo_xact("\\lo_unlink", own_transaction);
PQclear(res);
}
if (!finish_lo_xact("\\lo_unlink", own_transaction))
return false;
fprintf(pset.queryFout, "lo_unlink %u\n", loid);

40
src/bin/psql/prompt.c
View File

@ -3,7 +3,7 @@
*
* Copyright 2000 by PostgreSQL Global Development Group
*
* $Header: /cvsroot/pgsql/src/bin/psql/prompt.c,v 1.25 2003/04/04 20:42:13 momjian Exp $
* $Header: /cvsroot/pgsql/src/bin/psql/prompt.c,v 1.26 2003/06/28 00:12:40 tgl Exp $
*/
#include "postgres_fe.h"
#include "prompt.h"
@ -44,6 +44,7 @@
* or a ! if session is not connected to a database;
* in prompt2 -, *, ', or ";
* in prompt3 nothing
* %T - transaction status: empty, *, !, ? (unknown or no connection)
* %? - the error code of the last query (not yet implemented)
* %% - a percent sign
*
@ -172,7 +173,7 @@ get_prompt(promptStatus_t status)
case '8':
case '9':
*buf = parse_char((char **)&p);
break;
break;
case 'R':
switch (status)
@ -204,20 +205,39 @@ get_prompt(promptStatus_t status)
buf[0] = '\0';
break;
}
break;
case 'T':
if (!pset.db)
buf[0] = '?';
else switch (PQtransactionStatus(pset.db))
{
case PQTRANS_IDLE:
buf[0] = '\0';
break;
case PQTRANS_ACTIVE:
case PQTRANS_INTRANS:
buf[0] = '*';
break;
case PQTRANS_INERROR:
buf[0] = '!';
break;
default:
buf[0] = '?';
break;
}
break;
case '?':
/* not here yet */
break;
case '#':
{
if (pset.issuper)
buf[0] = '#';
else
buf[0] = '>';
break;
}
if (is_superuser())
buf[0] = '#';
else
buf[0] = '>';
break;
/* execute command */
case '`':

6
src/bin/psql/settings.h
View File

@ -3,7 +3,7 @@
*
* Copyright 2000 by PostgreSQL Global Development Group
*
* $Header: /cvsroot/pgsql/src/bin/psql/settings.h,v 1.13 2002/03/05 00:01:02 momjian Exp $
* $Header: /cvsroot/pgsql/src/bin/psql/settings.h,v 1.14 2003/06/28 00:12:40 tgl Exp $
*/
#ifndef SETTINGS_H
#define SETTINGS_H
@ -48,9 +48,7 @@ typedef struct _psqlSettings
char *inputfile; /* for error reporting */
unsigned lineno; /* also for error reporting */
bool issuper; /* is the current user a superuser? (used
* to form the prompt) */
bool timing; /* timing of all queries */
bool timing; /* enable timing of all queries */
} PsqlSettings;
extern PsqlSettings pset;

39
src/bin/psql/startup.c
View File

@ -3,7 +3,7 @@
*
* Copyright 2000 by PostgreSQL Global Development Group
*
* $Header: /cvsroot/pgsql/src/bin/psql/startup.c,v 1.73 2003/04/04 20:42:13 momjian Exp $
* $Header: /cvsroot/pgsql/src/bin/psql/startup.c,v 1.74 2003/06/28 00:12:40 tgl Exp $
*/
#include "postgres_fe.h"
@ -74,18 +74,13 @@ struct adhoc_opts
bool no_psqlrc;
};
static void
parse_psql_options(int argc, char *argv[], struct adhoc_opts * options);
static void
process_psqlrc(void);
static void
showVersion(void);
static void parse_psql_options(int argc, char *argv[],
struct adhoc_opts * options);
static void process_psqlrc(void);
static void showVersion(void);
#ifdef USE_SSL
static void
printSSLInfo(void);
static void printSSLInfo(void);
#endif
@ -144,6 +139,10 @@ main(int argc, char *argv[])
SetVariable(pset.vars, "VERSION", PG_VERSION_STR);
/* Default values for variables that are used in noninteractive cases */
SetVariableBool(pset.vars, "AUTOCOMMIT");
SetVariable(pset.vars, "VERBOSE", "default");
pset.notty = (!isatty(fileno(stdin)) || !isatty(fileno(stdout)));
/* This is obsolete and should be removed sometime. */
@ -208,11 +207,7 @@ main(int argc, char *argv[])
PQsetNoticeProcessor(pset.db, NoticeProcessor, NULL);
/*
* We need to save the encoding because we want to have it available
* even if the database connection goes bad.
*/
pset.encoding = PQclientEncoding(pset.db);
SyncVariables();
if (options.action == ACT_LIST_DB)
{
@ -222,14 +217,6 @@ main(int argc, char *argv[])
exit(success ? EXIT_SUCCESS : EXIT_FAILURE);
}
SetVariable(pset.vars, "DBNAME", PQdb(pset.db));
SetVariable(pset.vars, "USER", PQuser(pset.db));
SetVariable(pset.vars, "HOST", PQhost(pset.db));
SetVariable(pset.vars, "PORT", PQport(pset.db));
SetVariable(pset.vars, "ENCODING", pg_encoding_to_char(pset.encoding));
pset.popt.topt.encoding = pset.encoding;
/*
* Now find something to do
*/
@ -274,7 +261,6 @@ main(int argc, char *argv[])
*/
else
{
pset.issuper = test_superuser(PQuser(pset.db));
if (!QUIET() && !pset.notty)
{
printf(gettext("Welcome to %s %s, the PostgreSQL interactive terminal.\n\n"
@ -289,15 +275,18 @@ main(int argc, char *argv[])
#endif
}
/* Default values for variables that are used in interactive case */
SetVariable(pset.vars, "PROMPT1", DEFAULT_PROMPT1);
SetVariable(pset.vars, "PROMPT2", DEFAULT_PROMPT2);
SetVariable(pset.vars, "PROMPT3", DEFAULT_PROMPT3);
if (!options.no_psqlrc)
process_psqlrc();
if (!pset.notty)
initializeInput(options.no_readline ? 0 : 1);
if (options.action_string) /* -f - was used */
pset.inputfile = "<stdin>";
successResult = MainLoop(stdin);
}

45
src/bin/psql/variables.c
View File

@ -3,7 +3,7 @@
*
* Copyright 2000 by PostgreSQL Global Development Group
*
* $Header: /cvsroot/pgsql/src/bin/psql/variables.c,v 1.10 2003/03/20 06:43:35 momjian Exp $
* $Header: /cvsroot/pgsql/src/bin/psql/variables.c,v 1.11 2003/06/28 00:12:40 tgl Exp $
*/
#include "postgres_fe.h"
#include "variables.h"
@ -33,8 +33,6 @@ CreateVariableSpace(void)
return ptr;
}
const char *
GetVariable(VariableSpace space, const char *name)
{
@ -59,14 +57,19 @@ GetVariable(VariableSpace space, const char *name)
return NULL;
}
bool
GetVariableBool(VariableSpace space, const char *name)
{
return GetVariable(space, name) != NULL ? true : false;
}
const char *val;
val = GetVariable(space, name);
if (val == NULL)
return false; /* not set -> assume "off" */
if (strcmp(val, "off") == 0)
return false;
/* for backwards compatibility, anything except "off" is taken as "true" */
return true;
}
bool
VariableEquals(VariableSpace space, const char name[], const char value[])
@ -76,7 +79,6 @@ VariableEquals(VariableSpace space, const char name[], const char value[])
return var && (strcmp(var, value) == 0);
}
int
GetVariableNum(VariableSpace space,
const char name[],
@ -103,7 +105,6 @@ GetVariableNum(VariableSpace space,
return result;
}
int
SwitchVariable(VariableSpace space, const char name[], const char *opt, ...)
{
@ -117,17 +118,16 @@ SwitchVariable(VariableSpace space, const char name[], const char *opt, ...)
va_start(args, opt);
for (result=1; opt && (strcmp(var, opt) != 0); result++)
opt = va_arg(args,const char *);
if (!opt) result = var_notfound;
if (!opt)
result = VAR_NOTFOUND;
va_end(args);
}
else
result = var_notset;
result = VAR_NOTSET;
return result;
}
void
PrintVariables(VariableSpace space)
{
@ -136,7 +136,6 @@ PrintVariables(VariableSpace space)
printf("%s = '%s'\n", ptr->name, ptr->value);
}
bool
SetVariable(VariableSpace space, const char *name, const char *value)
{
@ -176,16 +175,12 @@ SetVariable(VariableSpace space, const char *name, const char *value)
return previous->next->value ? true : false;
}
bool
SetVariableBool(VariableSpace space, const char *name)
{
return SetVariable(space, name, "");
return SetVariable(space, name, "on");
}
bool
DeleteVariable(VariableSpace space, const char *name)
{
@ -217,15 +212,3 @@ DeleteVariable(VariableSpace space, const char *name)
return true;
}
void
DestroyVariableSpace(VariableSpace space)
{
if (!space)
return;
DestroyVariableSpace(space->next);
free(space);
}

14
src/bin/psql/variables.h
View File

@ -3,7 +3,7 @@
*
* Copyright 2000 by PostgreSQL Global Development Group
*
* $Header: /cvsroot/pgsql/src/bin/psql/variables.h,v 1.11 2003/03/20 06:43:35 momjian Exp $
* $Header: /cvsroot/pgsql/src/bin/psql/variables.h,v 1.12 2003/06/28 00:12:40 tgl Exp $
*/
/*
@ -45,18 +45,18 @@ int GetVariableNum(VariableSpace space,
/* Find value of variable <name> among NULL-terminated list of alternative
* options. Returns var_notset if the variable was not set, var_notfound if its
* value did not occur in the list of options, or the number of the matching
* option. The first option is 1, the second is 2 and so on.
* options. Returns VAR_NOTSET if the variable was not set, VAR_NOTFOUND
* if its value did not occur in the list of options, or the number of the
* matching option. The first option is 1, the second is 2 and so on.
*/
enum { var_notset = 0, var_notfound = -1 };
int SwitchVariable(VariableSpace space, const char name[], const char *opt,...);
enum { VAR_NOTSET = 0, VAR_NOTFOUND = -1 };
int SwitchVariable(VariableSpace space, const char name[],
const char *opt, ...);
void PrintVariables(VariableSpace space);
bool SetVariable(VariableSpace space, const char *name, const char *value);
bool SetVariableBool(VariableSpace space, const char *name);
bool DeleteVariable(VariableSpace space, const char *name);
void DestroyVariableSpace(VariableSpace space);
#endif /* VARIABLES_H */