/*
* Report a parse error.
*/
static void
report_parse_error(JsonParseStack *stack, JsonLexContext *lex)
{
char *detail = NULL;
char *token = NULL;
int toklen;
/* Handle case where the input ended prematurely. */
if (lex->token_start == NULL)
ereport(ERROR,
(errcode(ERRCODE_INVALID_TEXT_REPRESENTATION),
errmsg("invalid input syntax for type json: \"%s\"",
lex->input),
errdetail_internal("The input string ended unexpectedly.")));
/* Work out the offending token. */
toklen = lex->token_terminator - lex->token_start;
token = palloc(toklen + 1);
memcpy(token, lex->token_start, toklen);
token[toklen] = '\0';
/* Select correct detail message. */
if (stack == NULL)
detail = "line %d: Expected end of input, but found \"%s\".";
else
{
switch (stack->state)
{
case JSON_PARSE_VALUE:
detail = "line %d: Expected string, number, object, array, true, false, or null, but found \"%s\".";
break;
case JSON_PARSE_ARRAY_START:
detail = "line %d: Expected array element or \"]\", but found \"%s\".";
break;
case JSON_PARSE_ARRAY_NEXT:
detail = "line %d: Expected \",\" or \"]\", but found \"%s\".";
break;
case JSON_PARSE_OBJECT_START:
detail = "line %d: Expected string or \"}\", but found \"%s\".";
break;
case JSON_PARSE_OBJECT_LABEL:
detail = "line %d: Expected \":\", but found \"%s\".";
break;
case JSON_PARSE_OBJECT_NEXT:
detail = "line %d: Expected \",\" or \"}\", but found \"%s\".";
break;
case JSON_PARSE_OBJECT_COMMA:
detail = "line %d: Expected string, but found \"%s\".";
break;
}
}
ereport(ERROR,
(errcode(ERRCODE_INVALID_TEXT_REPRESENTATION),
errmsg("invalid input syntax for type json: \"%s\"",
lex->input),
errdetail_internal(detail, lex->line_number, token)));
}
/*
* Report an error we got from the remote server.
*
* elevel: error level to use (typically ERROR, but might be less)
* res: PGresult containing the error
* conn: connection we did the query on
* clear: if true, PQclear the result (otherwise caller will handle it)
* sql: NULL, or text of remote command we tried to execute
*
* Note: callers that choose not to throw ERROR for a remote error are
* responsible for making sure that the associated ConnCacheEntry gets
* marked with have_error = true.
*/
void
pgfdw_report_error(int elevel, PGresult *res, PGconn *conn,
bool clear, const char *sql)
{
/* If requested, PGresult must be released before leaving this function. */
PG_TRY();
{
char *diag_sqlstate = PQresultErrorField(res, PG_DIAG_SQLSTATE);
char *message_primary = PQresultErrorField(res, PG_DIAG_MESSAGE_PRIMARY);
char *message_detail = PQresultErrorField(res, PG_DIAG_MESSAGE_DETAIL);
char *message_hint = PQresultErrorField(res, PG_DIAG_MESSAGE_HINT);
char *message_context = PQresultErrorField(res, PG_DIAG_CONTEXT);
int sqlstate;
if (diag_sqlstate)
sqlstate = MAKE_SQLSTATE(diag_sqlstate[0],
diag_sqlstate[1],
diag_sqlstate[2],
diag_sqlstate[3],
diag_sqlstate[4]);
else
sqlstate = ERRCODE_CONNECTION_FAILURE;
/*
* If we don't get a message from the PGresult, try the PGconn. This
* is needed because for connection-level failures, PQexec may just
* return NULL, not a PGresult at all.
*/
if (message_primary == NULL)
message_primary = PQerrorMessage(conn);
ereport(elevel,
(errcode(sqlstate),
message_primary ? errmsg_internal("%s", message_primary) :
errmsg("unknown error"),
message_detail ? errdetail_internal("%s", message_detail) : 0,
message_hint ? errhint("%s", message_hint) : 0,
message_context ? errcontext("%s", message_context) : 0,
sql ? errcontext("Remote SQL command: %s", sql) : 0));
}
PG_CATCH();
{
if (clear)
PQclear(res);
PG_RE_THROW();
}
PG_END_TRY();
if (clear)
PQclear(res);
}
/*
* elog_node_display
* send pretty-printed contents of Node to postmaster log
*/
void
elog_node_display(int lev, const char *title, const void *obj, bool pretty)
{
char *s;
char *f;
s = nodeToString(obj);
if (pretty)
f = pretty_format_node_dump(s);
else
f = format_node_dump(s);
pfree(s);
ereport(lev,
(errmsg_internal("%s:", title),
errdetail_internal("%s", f)));
pfree(f);
}
/*
* Report an invalid input token.
*/
static void
report_invalid_token(JsonLexContext *lex)
{
char *token;
int toklen;
toklen = lex->token_terminator - lex->token_start;
token = palloc(toklen + 1);
memcpy(token, lex->token_start, toklen);
token[toklen] = '\0';
ereport(ERROR,
(errcode(ERRCODE_INVALID_TEXT_REPRESENTATION),
errmsg("invalid input syntax for type json"),
errdetail_internal("line %d: Token \"%s\" is invalid.",
lex->line_number, token)));
}
/*
* Report an error we got from the remote server.
*
* elevel: error level to use (typically ERROR, but might be less)
* res: PGresult containing the error
* clear: if true, PQclear the result (otherwise caller will handle it)
* sql: NULL, or text of remote command we tried to execute
*
* Note: callers that choose not to throw ERROR for a remote error are
* responsible for making sure that the associated ConnCacheEntry gets
* marked with have_error = true.
*/
void
pgfdw_report_error(int elevel, PGresult *res, bool clear, const char *sql)
{
/* If requested, PGresult must be released before leaving this function. */
PG_TRY();
{
char *diag_sqlstate = PQresultErrorField(res, PG_DIAG_SQLSTATE);
char *message_primary = PQresultErrorField(res, PG_DIAG_MESSAGE_PRIMARY);
char *message_detail = PQresultErrorField(res, PG_DIAG_MESSAGE_DETAIL);
char *message_hint = PQresultErrorField(res, PG_DIAG_MESSAGE_HINT);
char *message_context = PQresultErrorField(res, PG_DIAG_CONTEXT);
int sqlstate;
if (diag_sqlstate)
sqlstate = MAKE_SQLSTATE(diag_sqlstate[0],
diag_sqlstate[1],
diag_sqlstate[2],
diag_sqlstate[3],
diag_sqlstate[4]);
else
sqlstate = ERRCODE_CONNECTION_FAILURE;
ereport(elevel,
(errcode(sqlstate),
message_primary ? errmsg_internal("%s", message_primary) :
errmsg("unknown error"),
message_detail ? errdetail_internal("%s", message_detail) : 0,
message_hint ? errhint("%s", message_hint) : 0,
message_context ? errcontext("%s", message_context) : 0,
sql ? errcontext("Remote SQL command: %s", sql) : 0));
}
PG_CATCH();
{
if (clear)
PQclear(res);
PG_RE_THROW();
}
PG_END_TRY();
if (clear)
PQclear(res);
}
/*
* Fetch and report all error messages from GSSAPI. To avoid allocation,
* total error size is capped (at 128 bytes for each of major and minor). No
* known mechanisms will produce error messages beyond this cap.
*/
void
pg_GSS_error(int severity, const char *errmsg,
OM_uint32 maj_stat, OM_uint32 min_stat)
{
char msg_major[128],
msg_minor[128];
/* Fetch major status message */
pg_GSS_error_int(msg_major, sizeof(msg_major), maj_stat, GSS_C_GSS_CODE);
/* Fetch mechanism minor status message */
pg_GSS_error_int(msg_minor, sizeof(msg_minor), min_stat, GSS_C_MECH_CODE);
/*
* errmsg_internal, since translation of the first part must be done
* before calling this function anyway.
*/
ereport(severity,
(errmsg_internal("%s", errmsg),
errdetail_internal("%s: %s", msg_major, msg_minor)));
}
/*
* Connect to remote server using specified server and user mapping properties.
*/
static PGconn *
connect_pg_server(ForeignServer *server, UserMapping *user)
{
PGconn *volatile conn = NULL;
/*
* Use PG_TRY block to ensure closing connection on error.
*/
PG_TRY();
{
const char **keywords;
const char **values;
int n;
/*
* Construct connection params from generic options of ForeignServer
* and UserMapping. (Some of them might not be libpq options, in
* which case we'll just waste a few array slots.) Add 3 extra slots
* for fallback_application_name, client_encoding, end marker.
*/
n = list_length(server->options) + list_length(user->options) + 3;
keywords = (const char **) palloc(n * sizeof(char *));
values = (const char **) palloc(n * sizeof(char *));
n = 0;
n += ExtractConnectionOptions(server->options,
keywords + n, values + n);
n += ExtractConnectionOptions(user->options,
keywords + n, values + n);
/* Use "postgres_fdw" as fallback_application_name. */
keywords[n] = "fallback_application_name";
values[n] = "postgres_fdw";
n++;
/* Set client_encoding so that libpq can convert encoding properly. */
keywords[n] = "client_encoding";
values[n] = GetDatabaseEncodingName();
n++;
keywords[n] = values[n] = NULL;
/* verify connection parameters and make connection */
check_conn_params(keywords, values);
conn = PQconnectdbParams(keywords, values, false);
if (!conn || PQstatus(conn) != CONNECTION_OK)
{
char *connmessage;
int msglen;
/* libpq typically appends a newline, strip that */
connmessage = pstrdup(PQerrorMessage(conn));
msglen = strlen(connmessage);
if (msglen > 0 && connmessage[msglen - 1] == '\n')
connmessage[msglen - 1] = '\0';
ereport(ERROR,
(errcode(ERRCODE_SQLCLIENT_UNABLE_TO_ESTABLISH_SQLCONNECTION),
errmsg("could not connect to server \"%s\"",
server->servername),
errdetail_internal("%s", connmessage)));
}
/*
* Check that non-superuser has used password to establish connection;
* otherwise, he's piggybacking on the postgres server's user
* identity. See also dblink_security_check() in contrib/dblink.
*/
if (!superuser() && !PQconnectionUsedPassword(conn))
ereport(ERROR,
(errcode(ERRCODE_S_R_E_PROHIBITED_SQL_STATEMENT_ATTEMPTED),
errmsg("password is required"),
errdetail("Non-superuser cannot connect if the server does not request a password."),
errhint("Target server's authentication method must be changed.")));
/* Prepare new session for use */
configure_remote_session(conn);
pfree(keywords);
pfree(values);
}
PG_CATCH();
{
/* Release PGconn data structure if we managed to create one */
if (conn)
PQfinish(conn);
PG_RE_THROW();
}
PG_END_TRY();
return conn;
}
/*
* The next token in the input stream is known to be a string; lex it.
*/
static void
json_lex_string(JsonLexContext *lex)
{
char *s = lex->token_start + 1;
for (s = lex->token_start + 1; *s != '"'; ++s)
{
/* Per RFC4627, these characters MUST be escaped. */
if (*s < 32)
{
/* A NUL byte marks the (premature) end of the string. */
if (*s == '\0')
{
lex->token_terminator = s;
report_invalid_token(lex);
}
ereport(ERROR,
(errcode(ERRCODE_INVALID_TEXT_REPRESENTATION),
errmsg("invalid input syntax for type json"),
errdetail_internal("line %d: Character \"%c\" must be escaped.",
lex->line_number, *s)));
}
else if (*s == '\\')
{
/* OK, we have an escape character. */
++s;
if (*s == '\0')
{
lex->token_terminator = s;
report_invalid_token(lex);
}
else if (*s == 'u')
{
int i;
int ch = 0;
for (i = 1; i <= 4; ++i)
{
if (s[i] == '\0')
{
lex->token_terminator = s + i;
report_invalid_token(lex);
}
else if (s[i] >= '0' && s[i] <= '9')
ch = (ch * 16) + (s[i] - '0');
else if (s[i] >= 'a' && s[i] <= 'f')
ch = (ch * 16) + (s[i] - 'a') + 10;
else if (s[i] >= 'A' && s[i] <= 'F')
ch = (ch * 16) + (s[i] - 'A') + 10;
else
{
ereport(ERROR,
(errcode(ERRCODE_INVALID_TEXT_REPRESENTATION),
errmsg("invalid input syntax for type json"),
errdetail_internal("line %d: \"\\u\" must be followed by four hexadecimal digits.",
lex->line_number)));
}
}
/* Account for the four additional bytes we just parsed. */
s += 4;
}
else if (!strchr("\"\\/bfnrt", *s))
{
/* Error out. */
ereport(ERROR,
(errcode(ERRCODE_INVALID_TEXT_REPRESENTATION),
errmsg("invalid input syntax for type json"),
errdetail_internal("line %d: Invalid escape \"\\%s\".",
lex->line_number, extract_mb_char(s))));
}
}
}
/* Hooray, we found the end of the string! */
lex->token_terminator = s + 1;
}
/*
* Emit a PG error or notice, together with any available info about
* the current Python error, previously set by PLy_exception_set().
* This should be used to propagate Python errors into PG. If fmt is
* NULL, the Python error becomes the primary error message, otherwise
* it becomes the detail. If there is a Python traceback, it is put
* in the context.
*/
void
PLy_elog(int elevel, const char *fmt,...)
{
char *xmsg;
char *tbmsg;
int tb_depth;
StringInfoData emsg;
PyObject *exc,
*val,
*tb;
const char *primary = NULL;
int sqlerrcode = 0;
char *detail = NULL;
char *hint = NULL;
char *query = NULL;
int position = 0;
char *schema_name = NULL;
char *table_name = NULL;
char *column_name = NULL;
char *datatype_name = NULL;
char *constraint_name = NULL;
PyErr_Fetch(&exc, &val, &tb);
if (exc != NULL)
{
PyErr_NormalizeException(&exc, &val, &tb);
if (PyErr_GivenExceptionMatches(val, PLy_exc_spi_error))
PLy_get_spi_error_data(val, &sqlerrcode,
&detail, &hint, &query, &position,
&schema_name, &table_name, &column_name,
&datatype_name, &constraint_name);
else if (PyErr_GivenExceptionMatches(val, PLy_exc_error))
PLy_get_error_data(val, &sqlerrcode, &detail, &hint,
&schema_name, &table_name, &column_name,
&datatype_name, &constraint_name);
else if (PyErr_GivenExceptionMatches(val, PLy_exc_fatal))
elevel = FATAL;
}
/* this releases our refcount on tb! */
PLy_traceback(exc, val, tb,
&xmsg, &tbmsg, &tb_depth);
if (fmt)
{
initStringInfo(&emsg);
for (;;)
{
va_list ap;
int needed;
va_start(ap, fmt);
needed = appendStringInfoVA(&emsg, dgettext(TEXTDOMAIN, fmt), ap);
va_end(ap);
if (needed == 0)
break;
enlargeStringInfo(&emsg, needed);
}
primary = emsg.data;
/* Since we have a format string, we cannot have a SPI detail. */
Assert(detail == NULL);
/* If there's an exception message, it goes in the detail. */
if (xmsg)
detail = xmsg;
}
else
{
if (xmsg)
primary = xmsg;
}
PG_TRY();
{
ereport(elevel,
(errcode(sqlerrcode ? sqlerrcode : ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),
errmsg_internal("%s", primary ? primary : "no exception data"),
(detail) ? errdetail_internal("%s", detail) : 0,
(tb_depth > 0 && tbmsg) ? errcontext("%s", tbmsg) : 0,
(hint) ? errhint("%s", hint) : 0,
(query) ? internalerrquery(query) : 0,
(position) ? internalerrposition(position) : 0,
(schema_name) ? err_generic_string(PG_DIAG_SCHEMA_NAME,
schema_name) : 0,
(table_name) ? err_generic_string(PG_DIAG_TABLE_NAME,
table_name) : 0,
(column_name) ? err_generic_string(PG_DIAG_COLUMN_NAME,
column_name) : 0,
(datatype_name) ? err_generic_string(PG_DIAG_DATATYPE_NAME,
datatype_name) : 0,
(constraint_name) ? err_generic_string(PG_DIAG_CONSTRAINT_NAME,
constraint_name) : 0));
}
PG_CATCH();
{
if (fmt)
pfree(emsg.data);
if (xmsg)
pfree(xmsg);
if (tbmsg)
pfree(tbmsg);
Py_XDECREF(exc);
Py_XDECREF(val);
PG_RE_THROW();
}
PG_END_TRY();
if (fmt)
pfree(emsg.data);
if (xmsg)
pfree(xmsg);
if (tbmsg)
pfree(tbmsg);
Py_XDECREF(exc);
Py_XDECREF(val);
}
static PyObject *
PLy_output(volatile int level, PyObject *self, PyObject *args, PyObject *kw)
{
int sqlstate = 0;
char *volatile sqlstatestr = NULL;
char *volatile message = NULL;
char *volatile detail = NULL;
char *volatile hint = NULL;
char *volatile column_name = NULL;
char *volatile constraint_name = NULL;
char *volatile datatype_name = NULL;
char *volatile table_name = NULL;
char *volatile schema_name = NULL;
volatile MemoryContext oldcontext;
PyObject *key,
*value;
PyObject *volatile so;
Py_ssize_t pos = 0;
if (PyTuple_Size(args) == 1)
{
/*
* Treat single argument specially to avoid undesirable ('tuple',)
* decoration.
*/
PyObject *o;
if (!PyArg_UnpackTuple(args, "plpy.elog", 1, 1, &o))
PLy_elog(ERROR, "could not unpack arguments in plpy.elog");
so = PyObject_Str(o);
}
else
so = PyObject_Str(args);
if (so == NULL || ((message = PyString_AsString(so)) == NULL))
{
level = ERROR;
message = dgettext(TEXTDOMAIN, "could not parse error message in plpy.elog");
}
message = pstrdup(message);
Py_XDECREF(so);
if (kw != NULL)
{
while (PyDict_Next(kw, &pos, &key, &value))
{
char *keyword = PyString_AsString(key);
if (strcmp(keyword, "message") == 0)
{
/* the message should not be overwriten */
if (PyTuple_Size(args) != 0)
{
PLy_exception_set(PyExc_TypeError, "Argument 'message' given by name and position");
return NULL;
}
if (message)
pfree(message);
message = object_to_string(value);
}
else if (strcmp(keyword, "detail") == 0)
detail = object_to_string(value);
else if (strcmp(keyword, "hint") == 0)
hint = object_to_string(value);
else if (strcmp(keyword, "sqlstate") == 0)
sqlstatestr = object_to_string(value);
else if (strcmp(keyword, "schema_name") == 0)
schema_name = object_to_string(value);
else if (strcmp(keyword, "table_name") == 0)
table_name = object_to_string(value);
else if (strcmp(keyword, "column_name") == 0)
column_name = object_to_string(value);
else if (strcmp(keyword, "datatype_name") == 0)
datatype_name = object_to_string(value);
else if (strcmp(keyword, "constraint_name") == 0)
constraint_name = object_to_string(value);
else
{
PLy_exception_set(PyExc_TypeError,
"'%s' is an invalid keyword argument for this function",
keyword);
return NULL;
}
}
}
if (sqlstatestr != NULL)
{
if (strlen(sqlstatestr) != 5)
{
PLy_exception_set(PyExc_ValueError, "invalid SQLSTATE code");
return NULL;
}
if (strspn(sqlstatestr, "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ") != 5)
{
PLy_exception_set(PyExc_ValueError, "invalid SQLSTATE code");
return NULL;
}
sqlstate = MAKE_SQLSTATE(sqlstatestr[0],
sqlstatestr[1],
sqlstatestr[2],
sqlstatestr[3],
sqlstatestr[4]);
}
oldcontext = CurrentMemoryContext;
PG_TRY();
{
if (message != NULL)
pg_verifymbstr(message, strlen(message), false);
if (detail != NULL)
pg_verifymbstr(detail, strlen(detail), false);
if (hint != NULL)
pg_verifymbstr(hint, strlen(hint), false);
if (schema_name != NULL)
pg_verifymbstr(schema_name, strlen(schema_name), false);
if (table_name != NULL)
pg_verifymbstr(table_name, strlen(table_name), false);
if (column_name != NULL)
pg_verifymbstr(column_name, strlen(column_name), false);
if (datatype_name != NULL)
pg_verifymbstr(datatype_name, strlen(datatype_name), false);
if (constraint_name != NULL)
pg_verifymbstr(constraint_name, strlen(constraint_name), false);
ereport(level,
((sqlstate != 0) ? errcode(sqlstate) : 0,
(message != NULL) ? errmsg_internal("%s", message) : 0,
(detail != NULL) ? errdetail_internal("%s", detail) : 0,
(hint != NULL) ? errhint("%s", hint) : 0,
(column_name != NULL) ?
err_generic_string(PG_DIAG_COLUMN_NAME, column_name) : 0,
(constraint_name != NULL) ?
err_generic_string(PG_DIAG_CONSTRAINT_NAME, constraint_name) : 0,
(datatype_name != NULL) ?
err_generic_string(PG_DIAG_DATATYPE_NAME, datatype_name) : 0,
(table_name != NULL) ?
err_generic_string(PG_DIAG_TABLE_NAME, table_name) : 0,
(schema_name != NULL) ?
err_generic_string(PG_DIAG_SCHEMA_NAME, schema_name) : 0));
}
PG_CATCH();
{
ErrorData *edata;
MemoryContextSwitchTo(oldcontext);
edata = CopyErrorData();
FlushErrorState();
PLy_exception_set_with_details(PLy_exc_error, edata);
FreeErrorData(edata);
return NULL;
}
PG_END_TRY();
/*
* return a legal object so the interpreter will continue on its merry way
*/
Py_INCREF(Py_None);
return Py_None;
}
/*
* Emit a PG error or notice, together with any available info about
* the current Python error, previously set by PLy_exception_set().
* This should be used to propagate Python errors into PG. If fmt is
* NULL, the Python error becomes the primary error message, otherwise
* it becomes the detail. If there is a Python traceback, it is put
* in the context.
*/
void
PLy_elog(int elevel, const char *fmt,...)
{
char *xmsg;
char *tbmsg;
int tb_depth;
StringInfoData emsg;
PyObject *exc,
*val,
*tb;
const char *primary = NULL;
int sqlerrcode = 0;
char *detail = NULL;
char *hint = NULL;
char *query = NULL;
int position = 0;
PyErr_Fetch(&exc, &val, &tb);
if (exc != NULL)
{
if (PyErr_GivenExceptionMatches(val, PLy_exc_spi_error))
PLy_get_spi_error_data(val, &sqlerrcode, &detail, &hint, &query, &position);
else if (PyErr_GivenExceptionMatches(val, PLy_exc_fatal))
elevel = FATAL;
}
PyErr_Restore(exc, val, tb);
PLy_traceback(&xmsg, &tbmsg, &tb_depth);
if (fmt)
{
initStringInfo(&emsg);
for (;;)
{
va_list ap;
bool success;
va_start(ap, fmt);
success = appendStringInfoVA(&emsg, dgettext(TEXTDOMAIN, fmt), ap);
va_end(ap);
if (success)
break;
enlargeStringInfo(&emsg, emsg.maxlen);
}
primary = emsg.data;
/* Since we have a format string, we cannot have a SPI detail. */
Assert(detail == NULL);
/* If there's an exception message, it goes in the detail. */
if (xmsg)
detail = xmsg;
}
else
{
if (xmsg)
primary = xmsg;
}
PG_TRY();
{
ereport(elevel,
(errcode(sqlerrcode ? sqlerrcode : ERRCODE_INTERNAL_ERROR),
errmsg_internal("%s", primary ? primary : "no exception data"),
(detail) ? errdetail_internal("%s", detail) : 0,
(tb_depth > 0 && tbmsg) ? errcontext("%s", tbmsg) : 0,
(hint) ? errhint("%s", hint) : 0,
(query) ? internalerrquery(query) : 0,
(position) ? internalerrposition(position) : 0));
}
PG_CATCH();
{
if (fmt)
pfree(emsg.data);
if (xmsg)
pfree(xmsg);
if (tbmsg)
pfree(tbmsg);
PG_RE_THROW();
}
PG_END_TRY();
if (fmt)
pfree(emsg.data);
if (xmsg)
pfree(xmsg);
if (tbmsg)
pfree(tbmsg);
}
/*
* Report a detected deadlock, with available details.
*/
void
DeadLockReport(void)
{
StringInfoData clientbuf; /* errdetail for client */
StringInfoData logbuf; /* errdetail for server log */
StringInfoData locktagbuf;
int i;
initStringInfo(&clientbuf);
initStringInfo(&logbuf);
initStringInfo(&locktagbuf);
/* Generate the "waits for" lines sent to the client */
for (i = 0; i < nDeadlockDetails; i++)
{
DEADLOCK_INFO *info = &deadlockDetails[i];
int nextpid;
/* The last proc waits for the first one... */
if (i < nDeadlockDetails - 1)
nextpid = info[1].pid;
else
nextpid = deadlockDetails[0].pid;
/* reset locktagbuf to hold next object description */
resetStringInfo(&locktagbuf);
DescribeLockTag(&locktagbuf, &info->locktag);
if (i > 0)
appendStringInfoChar(&clientbuf, '\n');
appendStringInfo(&clientbuf,
_("Process %d waits for %s on %s; blocked by process %d."),
info->pid,
GetLockmodeName(info->locktag.locktag_lockmethodid,
info->lockmode),
locktagbuf.data,
nextpid);
}
/* Duplicate all the above for the server ... */
appendStringInfoString(&logbuf, clientbuf.data);
/* ... and add info about query strings */
for (i = 0; i < nDeadlockDetails; i++)
{
DEADLOCK_INFO *info = &deadlockDetails[i];
appendStringInfoChar(&logbuf, '\n');
appendStringInfo(&logbuf,
_("Process %d: %s"),
info->pid,
pgstat_get_backend_current_activity(info->pid, false));
}
pgstat_report_deadlock();
ereport(ERROR,
(errcode(ERRCODE_T_R_DEADLOCK_DETECTED),
errmsg("deadlock detected"),
errdetail_internal("%s", clientbuf.data),
errdetail_log("%s", logbuf.data),
errhint("See server log for query details.")));
}
/*
* Run ssl_passphrase_command
*
* prompt will be substituted for %p. is_server_start determines the loglevel
* of error messages.
*
* The result will be put in buffer buf, which is of size size. The return
* value is the length of the actual result.
*/
int
run_ssl_passphrase_command(const char *prompt, bool is_server_start, char *buf, int size)
{
int loglevel = is_server_start ? ERROR : LOG;
StringInfoData command;
char *p;
FILE *fh;
int pclose_rc;
size_t len = 0;
Assert(prompt);
Assert(size > 0);
buf[0] = '\0';
initStringInfo(&command);
for (p = ssl_passphrase_command; *p; p++)
{
if (p[0] == '%')
{
switch (p[1])
{
case 'p':
appendStringInfoString(&command, prompt);
p++;
break;
case '%':
appendStringInfoChar(&command, '%');
p++;
break;
default:
appendStringInfoChar(&command, p[0]);
}
}
else
appendStringInfoChar(&command, p[0]);
}
fh = OpenPipeStream(command.data, "r");
if (fh == NULL)
{
ereport(loglevel,
(errcode_for_file_access(),
errmsg("could not execute command \"%s\": %m",
command.data)));
goto error;
}
if (!fgets(buf, size, fh))
{
if (ferror(fh))
{
ereport(loglevel,
(errcode_for_file_access(),
errmsg("could not read from command \"%s\": %m",
command.data)));
goto error;
}
}
pclose_rc = ClosePipeStream(fh);
if (pclose_rc == -1)
{
ereport(loglevel,
(errcode_for_file_access(),
errmsg("could not close pipe to external command: %m")));
goto error;
}
else if (pclose_rc != 0)
{
ereport(loglevel,
(errcode_for_file_access(),
errmsg("command \"%s\" failed",
command.data),
errdetail_internal("%s", wait_result_to_str(pclose_rc))));
goto error;
}
/* strip trailing newline */
len = strlen(buf);
if (len > 0 && buf[len - 1] == '\n')
buf[--len] = '\0';
error:
pfree(command.data);
return len;
}
