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Change PQconndefaults() to return a malloc'd array, instead of a static

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array.  This allows processing of conninfo strings to be made thread-safe,
at the cost of a small memory leak in applications that use
PQconndefaults() and are not updated to free the returned array via
the new PQconninfoFree() function.  But PQconndefaults() is probably not
used very much, so this seems like a good compromise.
REL7_0_PATCHES
Tom Lane 26 years ago
parent 773e84f52a
commit a71daab4b4
8 changed files with 234 additions and 137 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
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  1. 33
      src/interfaces/libpgtcl/pgtclCmds.c
  2. 15
      src/interfaces/libpq/fe-auth.c
  3. 197
      src/interfaces/libpq/fe-connect.c
  4. 48
      src/interfaces/libpq/fe-exec.c
  5. 27
      src/interfaces/libpq/libpq-fe.h
  6. 18
      src/interfaces/libpq/libpq-int.h
  7. 1
      src/interfaces/libpq/libpqdll.def
  8. 32
      src/interfaces/perl5/Pg.xs

33
src/interfaces/libpgtcl/pgtclCmds.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/interfaces/libpgtcl/Attic/pgtclCmds.c,v 1.47 2000/02/27 07:44:22 tgl Exp $
* $Header: /cvsroot/pgsql/src/interfaces/libpgtcl/Attic/pgtclCmds.c,v 1.48 2000/03/11 03:08:35 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -237,25 +237,32 @@ tcl_value(char *value)
int
Pg_conndefaults(ClientData cData, Tcl_Interp *interp, int argc, char **argv)
{
PQconninfoOption *options = PQconndefaults();
PQconninfoOption *option;
Tcl_DString result;
char ibuf[32];
Tcl_DStringInit(&result);
for (option = PQconndefaults(); option->keyword != NULL; option++)
if (options)
{
char *val = option->val ? option->val : "";
Tcl_DStringInit(&result);
sprintf(ibuf, "%d", option->dispsize);
Tcl_DStringStartSublist(&result);
Tcl_DStringAppendElement(&result, option->keyword);
Tcl_DStringAppendElement(&result, option->label);
Tcl_DStringAppendElement(&result, option->dispchar);
Tcl_DStringAppendElement(&result, ibuf);
Tcl_DStringAppendElement(&result, val);
Tcl_DStringEndSublist(&result);
for (option = options; option->keyword != NULL; option++)
{
char *val = option->val ? option->val : "";
sprintf(ibuf, "%d", option->dispsize);
Tcl_DStringStartSublist(&result);
Tcl_DStringAppendElement(&result, option->keyword);
Tcl_DStringAppendElement(&result, option->label);
Tcl_DStringAppendElement(&result, option->dispchar);
Tcl_DStringAppendElement(&result, ibuf);
Tcl_DStringAppendElement(&result, val);
Tcl_DStringEndSublist(&result);
}
Tcl_DStringResult(interp, &result);
PQconninfoFree(options);
}
Tcl_DStringResult(interp, &result);
return TCL_OK;
}

15
src/interfaces/libpq/fe-auth.c
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@ -10,7 +10,7 @@
* exceed INITIAL_EXPBUFFER_SIZE (currently 256 bytes).
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/interfaces/libpq/fe-auth.c,v 1.37 2000/02/07 23:10:08 petere Exp $
* $Header: /cvsroot/pgsql/src/interfaces/libpq/fe-auth.c,v 1.38 2000/03/11 03:08:36 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -75,7 +75,7 @@ struct authsvc
* allowed. Unauthenticated connections are disallowed unless there
* isn't any authentication system.
*/
static struct authsvc authsvcs[] = {
static const struct authsvc authsvcs[] = {
#ifdef KRB4
{"krb4", STARTUP_KRB4_MSG, 1},
{"kerberos", STARTUP_KRB4_MSG, 1},
@ -94,7 +94,7 @@ static struct authsvc authsvcs[] = {
{"password", STARTUP_PASSWORD_MSG, 0}
};
static int n_authsvcs = sizeof(authsvcs) / sizeof(struct authsvc);
static const int n_authsvcs = sizeof(authsvcs) / sizeof(struct authsvc);
#ifdef KRB4
/*----------------------------------------------------------------
@ -549,7 +549,14 @@ fe_sendauth(AuthRequest areq, PGconn *conn, const char *hostname,
*
* Set/return the authentication service currently selected for use by the
* frontend. (You can only use one in the frontend, obviously.)
*
* NB: This is not thread-safe if different threads try to select different
* authentication services! It's OK for fe_getauthsvc to select the default,
* since that will be the same for all threads, but direct application use
* of fe_setauthsvc is not thread-safe. However, use of fe_setauthsvc is
* deprecated anyway...
*/
static int pg_authsvc = -1;
void
@ -558,7 +565,7 @@ fe_setauthsvc(const char *name, char *PQerrormsg)
int i;
for (i = 0; i < n_authsvcs; ++i)
if (!strcmp(name, authsvcs[i].name))
if (strcmp(name, authsvcs[i].name) == 0)
{
pg_authsvc = i;
break;

197
src/interfaces/libpq/fe-connect.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/interfaces/libpq/fe-connect.c,v 1.122 2000/02/24 15:53:12 momjian Exp $
* $Header: /cvsroot/pgsql/src/interfaces/libpq/fe-connect.c,v 1.123 2000/03/11 03:08:36 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -76,35 +76,25 @@ struct pg_setenv_state
} state;
PGconn *conn;
PGresult *res;
struct EnvironmentOptions *eo;
const struct EnvironmentOptions *eo;
} ;
static int connectDBStart(PGconn *conn);
static int connectDBComplete(PGconn *conn);
#ifdef USE_SSL
static SSL_CTX *SSL_context = NULL;
#endif
static PGconn *makeEmptyPGconn(void);
static void freePGconn(PGconn *conn);
static void closePGconn(PGconn *conn);
static int conninfo_parse(const char *conninfo, PQExpBuffer errorMessage);
static char *conninfo_getval(char *keyword);
static void conninfo_free(void);
static void defaultNoticeProcessor(void *arg, const char *message);
#define NOTIFYLIST_INITIAL_SIZE 10
#define NOTIFYLIST_GROWBY 10
/* ----------
* Definition of the conninfo parameters and their fallback resources.
*
* If Environment-Var and Compiled-in are specified as NULL, no
* fallback is available. If after all no value can be determined
* for an option, an error is returned.
*
* The values for dbname and user are treated special in conninfo_parse.
* The values for dbname and user are treated specially in conninfo_parse.
* If the Compiled-in resource is specified as a NULL value, the
* user is determined by fe_getauthname() and for dbname the user
* name is copied.
@ -112,23 +102,30 @@ static void defaultNoticeProcessor(void *arg, const char *message);
* The Label and Disp-Char entries are provided for applications that
* want to use PQconndefaults() to create a generic database connection
* dialog. Disp-Char is defined as follows:
* "" Normal input field
* "" Normal input field
* "*" Password field - hide value
* "D" Debug option - don't show by default
*
* PQconninfoOptions[] is a constant static array that we use to initialize
* a dynamically allocated working copy. All the "val" fields in
* PQconninfoOptions[] *must* be NULL. In a working copy, non-null "val"
* fields point to malloc'd strings that should be freed when the working
* array is freed (see PQconninfoFree).
* ----------
*/
static PQconninfoOption PQconninfoOptions[] = {
/* ----------------------------------------------------------------- */
/* Option-name Environment-Var Compiled-in Current value */
/* Label Disp-Char */
/* ----------------- --------------- --------------- --------------- */
/* "authtype" is ignored as it is no longer used. */
static const PQconninfoOption PQconninfoOptions[] = {
/* "authtype" is no longer used, so mark it "don't show". We keep it
* in the array so as not to reject conninfo strings from old apps that
* might still try to set it.
*/
{"authtype", "PGAUTHTYPE", DefaultAuthtype, NULL,
"Database-Authtype", "", 20},
"Database-Authtype", "D", 20},
{"user", "PGUSER", NULL, NULL,
"Database-User", "", 20},
{"password", "PGPASSWORD", DefaultPassword, NULL,
"Database-Password", "", 20},
"Database-Password", "*", 20},
{"dbname", "PGDATABASE", NULL, NULL,
"Database-Name", "", 20},
@ -147,12 +144,13 @@ static PQconninfoOption PQconninfoOptions[] = {
{"options", "PGOPTIONS", DefaultOption, NULL,
"Backend-Debug-Options", "D", 40},
/* ----------------- --------------- --------------- --------------- */
/* Terminating entry --- MUST BE LAST */
{NULL, NULL, NULL, NULL,
NULL, NULL, 0}
};
static struct EnvironmentOptions
static const struct EnvironmentOptions
{
const char *envName,
*pgName;
@ -181,6 +179,18 @@ static struct EnvironmentOptions
};
static int connectDBStart(PGconn *conn);
static int connectDBComplete(PGconn *conn);
static PGconn *makeEmptyPGconn(void);
static void freePGconn(PGconn *conn);
static void closePGconn(PGconn *conn);
static PQconninfoOption *conninfo_parse(const char *conninfo,
PQExpBuffer errorMessage);
static char *conninfo_getval(PQconninfoOption *connOptions,
const char *keyword);
static void defaultNoticeProcessor(void *arg, const char *message);
/* ----------------
* Connecting to a Database
*
@ -262,6 +272,7 @@ PGconn *
PQconnectStart(const char *conninfo)
{
PGconn *conn;
PQconninfoOption *connOptions;
char *tmp;
/* ----------
@ -274,37 +285,42 @@ PQconnectStart(const char *conninfo)
return (PGconn *) NULL;
/* ----------
* Parse the conninfo string and save settings in conn structure
* Parse the conninfo string
* ----------
*/
if (conninfo_parse(conninfo, &conn->errorMessage) < 0)
connOptions = conninfo_parse(conninfo, &conn->errorMessage);
if (connOptions == NULL)
{
conn->status = CONNECTION_BAD;
conninfo_free();
/* errorMessage is already set */
return conn;
}
tmp = conninfo_getval("hostaddr");
/*
* Move option values into conn structure
*/
tmp = conninfo_getval(connOptions, "hostaddr");
conn->pghostaddr = tmp ? strdup(tmp) : NULL;
tmp = conninfo_getval("host");
tmp = conninfo_getval(connOptions, "host");
conn->pghost = tmp ? strdup(tmp) : NULL;
tmp = conninfo_getval("port");
tmp = conninfo_getval(connOptions, "port");
conn->pgport = tmp ? strdup(tmp) : NULL;
tmp = conninfo_getval("tty");
tmp = conninfo_getval(connOptions, "tty");
conn->pgtty = tmp ? strdup(tmp) : NULL;
tmp = conninfo_getval("options");
tmp = conninfo_getval(connOptions, "options");
conn->pgoptions = tmp ? strdup(tmp) : NULL;
tmp = conninfo_getval("dbname");
tmp = conninfo_getval(connOptions, "dbname");
conn->dbName = tmp ? strdup(tmp) : NULL;
tmp = conninfo_getval("user");
tmp = conninfo_getval(connOptions, "user");
conn->pguser = tmp ? strdup(tmp) : NULL;
tmp = conninfo_getval("password");
tmp = conninfo_getval(connOptions, "password");
conn->pgpass = tmp ? strdup(tmp) : NULL;
/* ----------
* Free the connection info - all is in conn now
* Free the option info - all is in conn now
* ----------
*/
conninfo_free();
PQconninfoFree(connOptions);
/* ----------
* Connect to the database
@ -323,20 +339,28 @@ PQconnectStart(const char *conninfo)
* PQconndefaults
*
* Parse an empty string like PQconnectdb() would do and return the
* address of the connection options structure. Using this function
* an application might determine all possible options and their
* current default values.
* working connection options array.
*
* Using this function, an application may determine all possible options
* and their current default values.
*
* NOTE: as of PostgreSQL 7.0, the returned array is dynamically allocated
* and should be freed when no longer needed via PQconninfoFree(). (In prior
* versions, the returned array was static, but that's not thread-safe.)
* Pre-7.0 applications that use this function will see a small memory leak
* until they are updated to call PQconninfoFree.
* ----------------
*/
PQconninfoOption *
PQconndefaults(void)
{
PQExpBufferData errorBuf;
PQconninfoOption *connOptions;
initPQExpBuffer(&errorBuf);
conninfo_parse("", &errorBuf);
connOptions = conninfo_parse("", &errorBuf);
termPQExpBuffer(&errorBuf);
return PQconninfoOptions;
return connOptions;
}
/* ----------------
@ -565,7 +589,7 @@ update_db_info(PGconn *conn)
{
printfPQExpBuffer(&conn->errorMessage,
"connectDBStart() -- "
"non-tcp access only possible on "
"non-TCP access only possible on "
"localhost\n");
return 1;
}
@ -2037,9 +2061,13 @@ pqPacketSend(PGconn *conn, const char *buf, size_t len)
/* ----------------
* Conninfo parser routine
*
* If successful, a malloc'd PQconninfoOption array is returned.
* If not successful, NULL is returned and an error message is
* left in errorMessage.
* ----------------
*/
static int
static PQconninfoOption *
conninfo_parse(const char *conninfo, PQExpBuffer errorMessage)
{
char *pname;
@ -2048,16 +2076,27 @@ conninfo_parse(const char *conninfo, PQExpBuffer errorMessage)
char *tmp;
char *cp;
char *cp2;
PQconninfoOption *options;
PQconninfoOption *option;
char errortmp[INITIAL_EXPBUFFER_SIZE];
conninfo_free();
/* Make a working copy of PQconninfoOptions */
options = malloc(sizeof(PQconninfoOptions));
if (options == NULL)
{
printfPQExpBuffer(errorMessage,
"FATAL: cannot allocate memory for copy of PQconninfoOptions\n");
return NULL;
}
memcpy(options, PQconninfoOptions, sizeof(PQconninfoOptions));
/* Need a modifiable copy of the input string */
if ((buf = strdup(conninfo)) == NULL)
{
printfPQExpBuffer(errorMessage,
"FATAL: cannot allocate memory for copy of conninfo string\n");
return -1;
PQconninfoFree(options);
return NULL;
}
cp = buf;
@ -2094,10 +2133,11 @@ conninfo_parse(const char *conninfo, PQExpBuffer errorMessage)
if (*cp != '=')
{
printfPQExpBuffer(errorMessage,
"ERROR: PQconnectdb() - Missing '=' after '%s' in conninfo\n",
"ERROR: Missing '=' after '%s' in conninfo\n",
pname);
PQconninfoFree(options);
free(buf);
return -1;
return NULL;
}
*cp++ = '\0';
@ -2109,6 +2149,7 @@ conninfo_parse(const char *conninfo, PQExpBuffer errorMessage)
cp++;
}
/* Get the parameter value */
pval = cp;
if (*cp != '\'')
@ -2142,8 +2183,9 @@ conninfo_parse(const char *conninfo, PQExpBuffer errorMessage)
{
printfPQExpBuffer(errorMessage,
"ERROR: PQconnectdb() - unterminated quoted string in conninfo\n");
PQconninfoFree(options);
free(buf);
return -1;
return NULL;
}
if (*cp == '\\')
{
@ -2167,27 +2209,31 @@ conninfo_parse(const char *conninfo, PQExpBuffer errorMessage)
* for the param record.
* ----------
*/
for (option = PQconninfoOptions; option->keyword != NULL; option++)
for (option = options; option->keyword != NULL; option++)
{
if (!strcmp(option->keyword, pname))
if (strcmp(option->keyword, pname) == 0)
break;
}
if (option->keyword == NULL)
{
printfPQExpBuffer(errorMessage,
"ERROR: PQconnectdb() - unknown option '%s'\n",
"ERROR: Unknown conninfo option '%s'\n",
pname);
PQconninfoFree(options);
free(buf);
return -1;
return NULL;
}
/* ----------
* Store the value
* ----------
*/
if (option->val)
free(option->val);
option->val = strdup(pval);
}
/* Done with the modifiable input string */
free(buf);
/* ----------
@ -2195,7 +2241,7 @@ conninfo_parse(const char *conninfo, PQExpBuffer errorMessage)
* in the conninfo string.
* ----------
*/
for (option = PQconninfoOptions; option->keyword != NULL; option++)
for (option = options; option->keyword != NULL; option++)
{
if (option->val != NULL)
continue; /* Value was in conninfo */
@ -2228,7 +2274,7 @@ conninfo_parse(const char *conninfo, PQExpBuffer errorMessage)
* Special handling for user
* ----------
*/
if (!strcmp(option->keyword, "user"))
if (strcmp(option->keyword, "user") == 0)
{
option->val = fe_getauthname(errortmp);
/* note any error message is thrown away */
@ -2239,27 +2285,28 @@ conninfo_parse(const char *conninfo, PQExpBuffer errorMessage)
* Special handling for dbname
* ----------
*/
if (!strcmp(option->keyword, "dbname"))
if (strcmp(option->keyword, "dbname") == 0)
{
tmp = conninfo_getval("user");
tmp = conninfo_getval(options, "user");
if (tmp)
option->val = strdup(tmp);
continue;
}
}
return 0;
return options;
}
static char *
conninfo_getval(char *keyword)
conninfo_getval(PQconninfoOption *connOptions,
const char *keyword)
{
PQconninfoOption *option;
for (option = PQconninfoOptions; option->keyword != NULL; option++)
for (option = connOptions; option->keyword != NULL; option++)
{
if (!strcmp(option->keyword, keyword))
if (strcmp(option->keyword, keyword) == 0)
return option->val;
}
@ -2267,19 +2314,20 @@ conninfo_getval(char *keyword)
}
static void
conninfo_free()
void
PQconninfoFree(PQconninfoOption *connOptions)
{
PQconninfoOption *option;
for (option = PQconninfoOptions; option->keyword != NULL; option++)
if (connOptions == NULL)
return;
for (option = connOptions; option->keyword != NULL; option++)
{
if (option->val != NULL)
{
free(option->val);
option->val = NULL;
}
}
free(connOptions);
}
/* =========== accessor functions for PGconn ========= */
@ -2350,10 +2398,9 @@ PQstatus(const PGconn *conn)
char *
PQerrorMessage(const PGconn *conn)
{
static char noConn[] = "PQerrorMessage: conn pointer is NULL\n";
if (!conn)
return noConn;
return "PQerrorMessage: conn pointer is NULL\n";
return conn->errorMessage.data;
}
@ -2452,13 +2499,15 @@ PQnoticeProcessor
PQsetNoticeProcessor(PGconn *conn, PQnoticeProcessor proc, void *arg)
{
PQnoticeProcessor old;
if (conn == NULL)
return NULL;
old = conn->noticeHook;
if (proc) {
conn->noticeHook = proc;
conn->noticeArg = arg;
if (proc)
{
conn->noticeHook = proc;
conn->noticeArg = arg;
}
return old;
}

48
src/interfaces/libpq/fe-exec.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/interfaces/libpq/fe-exec.c,v 1.91 2000/02/24 04:50:51 tgl Exp $
* $Header: /cvsroot/pgsql/src/interfaces/libpq/fe-exec.c,v 1.92 2000/03/11 03:08:36 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -39,6 +39,7 @@ char * const pgresStatus[] = {
};
/* Note: DONOTICE macro will work if applied to either PGconn or PGresult */
#define DONOTICE(conn,message) \
((*(conn)->noticeHook) ((conn)->noticeArg, (message)))
@ -135,7 +136,7 @@ PQmakeEmptyPGresult(PGconn *conn, ExecStatusType status)
result = (PGresult *) malloc(sizeof(PGresult));
result->conn = conn; /* might be NULL */
result->xconn = conn; /* might be NULL */
result->ntups = 0;
result->numAttributes = 0;
result->attDescs = NULL;
@ -150,8 +151,11 @@ PQmakeEmptyPGresult(PGconn *conn, ExecStatusType status)
result->curOffset = 0;
result->spaceLeft = 0;
if (conn) /* consider copying conn's errorMessage */
if (conn)
{
result->noticeHook = conn->noticeHook;
result->noticeArg = conn->noticeArg;
/* consider copying conn's errorMessage */
switch (status)
{
case PGRES_EMPTY_QUERY:
@ -166,6 +170,12 @@ PQmakeEmptyPGresult(PGconn *conn, ExecStatusType status)
break;
}
}
else
{
result->noticeHook = NULL;
result->noticeArg = NULL;
}
return result;
}
@ -1833,12 +1843,12 @@ check_field_number(const char *routineName, const PGresult *res, int field_num)
return FALSE; /* no way to display error message... */
if (field_num < 0 || field_num >= res->numAttributes)
{
if (res->conn)
if (res->noticeHook)
{
sprintf(noticeBuf,
"%s: ERROR! field number %d is out of range 0..%d\n",
routineName, field_num, res->numAttributes - 1);
DONOTICE(res->conn, noticeBuf);
DONOTICE(res, noticeBuf);
}
return FALSE;
}
@ -1855,23 +1865,23 @@ check_tuple_field_number(const char *routineName, const PGresult *res,
return FALSE; /* no way to display error message... */
if (tup_num < 0 || tup_num >= res->ntups)
{
if (res->conn)
if (res->noticeHook)
{
sprintf(noticeBuf,
"%s: ERROR! tuple number %d is out of range 0..%d\n",
routineName, tup_num, res->ntups - 1);
DONOTICE(res->conn, noticeBuf);
DONOTICE(res, noticeBuf);
}
return FALSE;
}
if (field_num < 0 || field_num >= res->numAttributes)
{
if (res->conn)
if (res->noticeHook)
{
sprintf(noticeBuf,
"%s: ERROR! field number %d is out of range 0..%d\n",
routineName, field_num, res->numAttributes - 1);
DONOTICE(res->conn, noticeBuf);
DONOTICE(res, noticeBuf);
}
return FALSE;
}
@ -1982,11 +1992,11 @@ PQcmdStatus(PGresult *res)
char *
PQoidStatus(const PGresult *res)
{
/*
* This must be enough to hold the result. Don't laugh, this is
* better than what this function used to do.
*/
static char buf[24];
/*
* This must be enough to hold the result. Don't laugh, this is
* better than what this function used to do.
*/
static char buf[24];
size_t len;
@ -1995,7 +2005,7 @@ PQoidStatus(const PGresult *res)
len = strspn(res->cmdStatus + 7, "0123456789");
if (len > 23)
len = 23;
len = 23;
strncpy(buf, res->cmdStatus + 7, len);
buf[23] = '\0';
@ -2046,12 +2056,12 @@ PQcmdTuples(PGresult *res)
if (*p == 0)
{
if (res->conn)
if (res->noticeHook)
{
sprintf(noticeBuf,
"PQcmdTuples (%s) -- bad input from server\n",
res->cmdStatus);
DONOTICE(res->conn, noticeBuf);
DONOTICE(res, noticeBuf);
}
return "";
}
@ -2062,11 +2072,11 @@ PQcmdTuples(PGresult *res)
p++; /* INSERT: skip oid */
if (*p == 0)
{
if (res->conn)
if (res->noticeHook)
{
sprintf(noticeBuf,
"PQcmdTuples (INSERT) -- there's no # of tuples\n");
DONOTICE(res->conn, noticeBuf);
DONOTICE(res, noticeBuf);
}
return "";
}

27
src/interfaces/libpq/libpq-fe.h
Unescape View File

@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2000, PostgreSQL, Inc
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: libpq-fe.h,v 1.60 2000/02/07 23:10:11 petere Exp $
* $Id: libpq-fe.h,v 1.61 2000/03/11 03:08:37 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -130,6 +130,10 @@ extern "C"
/* ----------------
* Structure for the conninfo parameter definitions returned by PQconndefaults
*
* All fields except "val" point at static strings which must not be altered.
* "val" is either NULL or a malloc'd current-value string. PQconninfoFree()
* will release both the val strings and the PQconninfoOption array itself.
* ----------------
*/
typedef struct _PQconninfoOption
@ -137,14 +141,14 @@ extern "C"
char *keyword; /* The keyword of the option */
char *envvar; /* Fallback environment variable name */
char *compiled; /* Fallback compiled in default value */
char *val; /* Options value */
char *val; /* Option's current value, or NULL */
char *label; /* Label for field in connect dialog */
char *dispchar; /* Character to display for this field */
/* in a connect dialog. Values are: */
/* "" Display entered value as is */
/* "*" Password field - hide value */
/* "D" Debug options - don't */
/* create a field by default */
char *dispchar; /* Character to display for this field
* in a connect dialog. Values are:
* "" Display entered value as is
* "*" Password field - hide value
* "D" Debug option - don't show by default
*/
int dispsize; /* Field size in characters for dialog */
} PQconninfoOption;
@ -183,11 +187,14 @@ extern "C"
#define PQsetdb(M_PGHOST,M_PGPORT,M_PGOPT,M_PGTTY,M_DBNAME) \
PQsetdbLogin(M_PGHOST, M_PGPORT, M_PGOPT, M_PGTTY, M_DBNAME, NULL, NULL)
/* close the current connection and free the PGconn data structure */
extern void PQfinish(PGconn *conn);
/* get info about connection options known to PQconnectdb */
extern PQconninfoOption *PQconndefaults(void);
/* close the current connection and free the PGconn data structure */
extern void PQfinish(PGconn *conn);
/* free the data structure returned by PQconndefaults() */
extern void PQconninfoFree(PQconninfoOption *connOptions);
/*
* close the current connection and restablish a new one with the same

18
src/interfaces/libpq/libpq-int.h
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@ -12,7 +12,7 @@
* Portions Copyright (c) 1996-2000, PostgreSQL, Inc
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: libpq-int.h,v 1.19 2000/02/07 23:10:11 petere Exp $
* $Id: libpq-int.h,v 1.20 2000/03/11 03:08:37 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -121,7 +121,21 @@ struct pg_result
* last query */
int binary; /* binary tuple values if binary == 1,
* otherwise ASCII */
PGconn *conn; /* connection we did the query on, if any */
/*
* The conn link in PGresult is no longer used by any libpq code.
* It should be removed entirely, because it could be a dangling link
* (the application could keep the PGresult around longer than it keeps
* the PGconn!) But there may be apps out there that depend on it,
* so we will leave it here at least for a release or so.
*/
PGconn *xconn; /* connection we did the query on, if any */
/* Callback procedure for notice/error message processing
* (copied from originating PGconn).
*/
PQnoticeProcessor noticeHook;
void *noticeArg;
char *errMsg; /* error message, or NULL if no error */
/* All NULL attributes in the query result point to this null string */

1
src/interfaces/libpq/libpqdll.def
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@ -78,3 +78,4 @@ EXPORTS
appendPQExpBufferStr @ 75
destroyPQExpBuffer @ 76
createPQExpBuffer @ 77
PQconninfoFree @ 78

32
src/interfaces/perl5/Pg.xs
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@ -1,6 +1,6 @@
/*-------------------------------------------------------
*
* $Id: Pg.xs,v 1.13 1999/10/13 02:26:37 momjian Exp $ with patch for NULs
* $Id: Pg.xs,v 1.14 2000/03/11 03:08:37 tgl Exp $ with patch for NULs
*
* Copyright (c) 1997, 1998 Edmund Mergl
*
@ -247,17 +247,18 @@ PQsetdb(pghost, pgport, pgoptions, pgtty, dbname)
HV *
PQconndefaults()
CODE:
PQconninfoOption *infoOption;
PQconninfoOption *infoOptions;
RETVAL = newHV();
if (infoOption = PQconndefaults()) {
while (infoOption->keyword != NULL) {
if (infoOption->val != NULL) {
hv_store(RETVAL, infoOption->keyword, strlen(infoOption->keyword), newSVpv(infoOption->val, 0), 0);
if (infoOptions = PQconndefaults()) {
PQconninfoOption *option;
for (option = infoOptions; option->keyword != NULL; option++) {
if (option->val != NULL) {
hv_store(RETVAL, option->keyword, strlen(option->keyword), newSVpv(option->val, 0), 0);
} else {
hv_store(RETVAL, infoOption->keyword, strlen(infoOption->keyword), newSVpv("", 0), 0);
hv_store(RETVAL, option->keyword, strlen(option->keyword), newSVpv("", 0), 0);
}
infoOption++;
}
PQconninfoFree(infoOptions);
}
OUTPUT:
RETVAL
@ -774,17 +775,18 @@ setdb(pghost, pgport, pgoptions, pgtty, dbname)
HV *
conndefaults()
CODE:
PQconninfoOption *infoOption;
PQconninfoOption *infoOptions;
RETVAL = newHV();
if (infoOption = PQconndefaults()) {
while (infoOption->keyword != NULL) {
if (infoOption->val != NULL) {
hv_store(RETVAL, infoOption->keyword, strlen(infoOption->keyword), newSVpv(infoOption->val, 0), 0);
if (infoOptions = PQconndefaults()) {
PQconninfoOption *option;
for (option = infoOptions; option->keyword != NULL; option++) {
if (option->val != NULL) {
hv_store(RETVAL, option->keyword, strlen(option->keyword), newSVpv(option->val, 0), 0);
} else {
hv_store(RETVAL, infoOption->keyword, strlen(infoOption->keyword), newSVpv("", 0), 0);
hv_store(RETVAL, option->keyword, strlen(option->keyword), newSVpv("", 0), 0);
}
infoOption++;
}
PQconninfoFree(infoOptions);
}
OUTPUT:
RETVAL

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