a5dbca460a
An error PGresult generated by libpq itself, such as a report of connection loss, won't have broken-down error fields. ecpg_raise_backend() blithely assumed that PG_DIAG_MESSAGE_PRIMARY would always be present, and would end up passing a NULL string pointer to snprintf when it isn't. That would typically crash before 3779ac62d, and it would fail to provide a useful error report in any case. Best practice is to substitute PQerrorMessage(conn) in such cases, so do that. Per bug #17421 from Masayuki Hirose. Back-patch to all supported branches. Discussion: https://postgr.es/m/17421-790ff887e3188874@postgresql.org
347 lines
11 KiB
C
347 lines
11 KiB
C
/* src/interfaces/ecpg/ecpglib/error.c */
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#define POSTGRES_ECPG_INTERNAL
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#include "postgres_fe.h"
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#include "ecpgerrno.h"
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#include "ecpglib.h"
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#include "ecpglib_extern.h"
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#include "ecpgtype.h"
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#include "sqlca.h"
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void
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ecpg_raise(int line, int code, const char *sqlstate, const char *str)
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{
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struct sqlca_t *sqlca = ECPGget_sqlca();
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if (sqlca == NULL)
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{
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ecpg_log("out of memory");
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ECPGfree_auto_mem();
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return;
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}
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sqlca->sqlcode = code;
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strncpy(sqlca->sqlstate, sqlstate, sizeof(sqlca->sqlstate));
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switch (code)
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{
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case ECPG_NOT_FOUND:
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snprintf(sqlca->sqlerrm.sqlerrmc, sizeof(sqlca->sqlerrm.sqlerrmc),
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/*------
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translator: this string will be truncated at 149 characters expanded. */
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ecpg_gettext("no data found on line %d"), line);
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break;
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case ECPG_OUT_OF_MEMORY:
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snprintf(sqlca->sqlerrm.sqlerrmc, sizeof(sqlca->sqlerrm.sqlerrmc),
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/*------
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translator: this string will be truncated at 149 characters expanded. */
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ecpg_gettext("out of memory on line %d"), line);
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break;
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case ECPG_UNSUPPORTED:
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snprintf(sqlca->sqlerrm.sqlerrmc, sizeof(sqlca->sqlerrm.sqlerrmc),
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/*------
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translator: this string will be truncated at 149 characters expanded. */
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ecpg_gettext("unsupported type \"%s\" on line %d"), str, line);
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break;
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case ECPG_TOO_MANY_ARGUMENTS:
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snprintf(sqlca->sqlerrm.sqlerrmc, sizeof(sqlca->sqlerrm.sqlerrmc),
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/*------
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translator: this string will be truncated at 149 characters expanded. */
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ecpg_gettext("too many arguments on line %d"), line);
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break;
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case ECPG_TOO_FEW_ARGUMENTS:
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snprintf(sqlca->sqlerrm.sqlerrmc, sizeof(sqlca->sqlerrm.sqlerrmc),
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/*------
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translator: this string will be truncated at 149 characters expanded. */
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ecpg_gettext("too few arguments on line %d"), line);
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break;
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case ECPG_INT_FORMAT:
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snprintf(sqlca->sqlerrm.sqlerrmc, sizeof(sqlca->sqlerrm.sqlerrmc),
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/*------
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translator: this string will be truncated at 149 characters expanded. */
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ecpg_gettext("invalid input syntax for type int: \"%s\", on line %d"), str, line);
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break;
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case ECPG_UINT_FORMAT:
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snprintf(sqlca->sqlerrm.sqlerrmc, sizeof(sqlca->sqlerrm.sqlerrmc),
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/*------
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translator: this string will be truncated at 149 characters expanded. */
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ecpg_gettext("invalid input syntax for type unsigned int: \"%s\", on line %d"), str, line);
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break;
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case ECPG_FLOAT_FORMAT:
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snprintf(sqlca->sqlerrm.sqlerrmc, sizeof(sqlca->sqlerrm.sqlerrmc),
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/*------
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translator: this string will be truncated at 149 characters expanded. */
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ecpg_gettext("invalid input syntax for floating-point type: \"%s\", on line %d"), str, line);
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break;
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case ECPG_CONVERT_BOOL:
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if (str)
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snprintf(sqlca->sqlerrm.sqlerrmc, sizeof(sqlca->sqlerrm.sqlerrmc),
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/*------
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translator: this string will be truncated at 149 characters expanded. */
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ecpg_gettext("invalid syntax for type boolean: \"%s\", on line %d"), str, line);
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else
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snprintf(sqlca->sqlerrm.sqlerrmc, sizeof(sqlca->sqlerrm.sqlerrmc),
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/*------
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translator: this string will be truncated at 149 characters expanded. */
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ecpg_gettext("could not convert boolean value: size mismatch, on line %d"), line);
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break;
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case ECPG_EMPTY:
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snprintf(sqlca->sqlerrm.sqlerrmc, sizeof(sqlca->sqlerrm.sqlerrmc),
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/*------
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translator: this string will be truncated at 149 characters expanded. */
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ecpg_gettext("empty query on line %d"), line);
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break;
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case ECPG_MISSING_INDICATOR:
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snprintf(sqlca->sqlerrm.sqlerrmc, sizeof(sqlca->sqlerrm.sqlerrmc),
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/*------
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translator: this string will be truncated at 149 characters expanded. */
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ecpg_gettext("null value without indicator on line %d"), line);
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break;
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case ECPG_NO_ARRAY:
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snprintf(sqlca->sqlerrm.sqlerrmc, sizeof(sqlca->sqlerrm.sqlerrmc),
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/*------
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translator: this string will be truncated at 149 characters expanded. */
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ecpg_gettext("variable does not have an array type on line %d"), line);
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break;
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case ECPG_DATA_NOT_ARRAY:
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snprintf(sqlca->sqlerrm.sqlerrmc, sizeof(sqlca->sqlerrm.sqlerrmc),
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/*------
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translator: this string will be truncated at 149 characters expanded. */
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ecpg_gettext("data read from server is not an array on line %d"), line);
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break;
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case ECPG_ARRAY_INSERT:
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snprintf(sqlca->sqlerrm.sqlerrmc, sizeof(sqlca->sqlerrm.sqlerrmc),
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/*------
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translator: this string will be truncated at 149 characters expanded. */
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ecpg_gettext("inserting an array of variables is not supported on line %d"), line);
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break;
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case ECPG_NO_CONN:
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snprintf(sqlca->sqlerrm.sqlerrmc, sizeof(sqlca->sqlerrm.sqlerrmc),
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/*------
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translator: this string will be truncated at 149 characters expanded. */
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ecpg_gettext("connection \"%s\" does not exist on line %d"), str, line);
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break;
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case ECPG_NOT_CONN:
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snprintf(sqlca->sqlerrm.sqlerrmc, sizeof(sqlca->sqlerrm.sqlerrmc),
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/*------
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translator: this string will be truncated at 149 characters expanded. */
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ecpg_gettext("not connected to connection \"%s\" on line %d"), str, line);
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break;
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case ECPG_INVALID_STMT:
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snprintf(sqlca->sqlerrm.sqlerrmc, sizeof(sqlca->sqlerrm.sqlerrmc),
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/*------
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translator: this string will be truncated at 149 characters expanded. */
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ecpg_gettext("invalid statement name \"%s\" on line %d"), str, line);
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break;
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case ECPG_UNKNOWN_DESCRIPTOR:
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snprintf(sqlca->sqlerrm.sqlerrmc, sizeof(sqlca->sqlerrm.sqlerrmc),
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/*------
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translator: this string will be truncated at 149 characters expanded. */
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ecpg_gettext("descriptor \"%s\" not found on line %d"), str, line);
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break;
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case ECPG_INVALID_DESCRIPTOR_INDEX:
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snprintf(sqlca->sqlerrm.sqlerrmc, sizeof(sqlca->sqlerrm.sqlerrmc),
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/*------
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translator: this string will be truncated at 149 characters expanded. */
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ecpg_gettext("descriptor index out of range on line %d"), line);
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break;
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case ECPG_UNKNOWN_DESCRIPTOR_ITEM:
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snprintf(sqlca->sqlerrm.sqlerrmc, sizeof(sqlca->sqlerrm.sqlerrmc),
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/*------
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translator: this string will be truncated at 149 characters expanded. */
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ecpg_gettext("unrecognized descriptor item \"%s\" on line %d"), str, line);
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break;
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case ECPG_VAR_NOT_NUMERIC:
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snprintf(sqlca->sqlerrm.sqlerrmc, sizeof(sqlca->sqlerrm.sqlerrmc),
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/*------
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translator: this string will be truncated at 149 characters expanded. */
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ecpg_gettext("variable does not have a numeric type on line %d"), line);
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break;
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case ECPG_VAR_NOT_CHAR:
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snprintf(sqlca->sqlerrm.sqlerrmc, sizeof(sqlca->sqlerrm.sqlerrmc),
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/*------
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translator: this string will be truncated at 149 characters expanded. */
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ecpg_gettext("variable does not have a character type on line %d"), line);
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break;
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case ECPG_TRANS:
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snprintf(sqlca->sqlerrm.sqlerrmc, sizeof(sqlca->sqlerrm.sqlerrmc),
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/*------
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translator: this string will be truncated at 149 characters expanded. */
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ecpg_gettext("error in transaction processing on line %d"), line);
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break;
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case ECPG_CONNECT:
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snprintf(sqlca->sqlerrm.sqlerrmc, sizeof(sqlca->sqlerrm.sqlerrmc),
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/*------
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translator: this string will be truncated at 149 characters expanded. */
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ecpg_gettext("could not connect to database \"%s\" on line %d"), str, line);
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break;
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default:
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snprintf(sqlca->sqlerrm.sqlerrmc, sizeof(sqlca->sqlerrm.sqlerrmc),
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/*------
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translator: this string will be truncated at 149 characters expanded. */
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ecpg_gettext("SQL error %d on line %d"), code, line);
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break;
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}
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sqlca->sqlerrm.sqlerrml = strlen(sqlca->sqlerrm.sqlerrmc);
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ecpg_log("raising sqlcode %d on line %d: %s\n", code, line, sqlca->sqlerrm.sqlerrmc);
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/* free all memory we have allocated for the user */
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ECPGfree_auto_mem();
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}
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void
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ecpg_raise_backend(int line, PGresult *result, PGconn *conn, int compat)
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{
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struct sqlca_t *sqlca = ECPGget_sqlca();
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char *sqlstate;
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char *message;
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if (sqlca == NULL)
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{
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ecpg_log("out of memory");
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ECPGfree_auto_mem();
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return;
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}
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/*
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* PQresultErrorField will return NULL if "result" is NULL, or if there is
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* no such field, which will happen for libpq-generated errors. Fall back
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* to PQerrorMessage in such cases.
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*/
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sqlstate = PQresultErrorField(result, PG_DIAG_SQLSTATE);
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if (sqlstate == NULL)
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sqlstate = ECPG_SQLSTATE_ECPG_INTERNAL_ERROR;
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message = PQresultErrorField(result, PG_DIAG_MESSAGE_PRIMARY);
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if (message == NULL)
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message = PQerrorMessage(conn);
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if (strcmp(sqlstate, ECPG_SQLSTATE_ECPG_INTERNAL_ERROR) == 0)
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{
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/*
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* we might get here if the connection breaks down, so let's check for
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* this instead of giving just the generic internal error
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*/
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if (PQstatus(conn) == CONNECTION_BAD)
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{
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sqlstate = "57P02";
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message = ecpg_gettext("the connection to the server was lost");
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}
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}
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/* copy error message */
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snprintf(sqlca->sqlerrm.sqlerrmc, sizeof(sqlca->sqlerrm.sqlerrmc), "%s on line %d", message, line);
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sqlca->sqlerrm.sqlerrml = strlen(sqlca->sqlerrm.sqlerrmc);
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/* copy SQLSTATE */
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strncpy(sqlca->sqlstate, sqlstate, sizeof(sqlca->sqlstate));
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/* assign SQLCODE for backward compatibility */
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if (strncmp(sqlca->sqlstate, "23505", sizeof(sqlca->sqlstate)) == 0)
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sqlca->sqlcode = INFORMIX_MODE(compat) ? ECPG_INFORMIX_DUPLICATE_KEY : ECPG_DUPLICATE_KEY;
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else if (strncmp(sqlca->sqlstate, "21000", sizeof(sqlca->sqlstate)) == 0)
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sqlca->sqlcode = INFORMIX_MODE(compat) ? ECPG_INFORMIX_SUBSELECT_NOT_ONE : ECPG_SUBSELECT_NOT_ONE;
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else
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sqlca->sqlcode = ECPG_PGSQL;
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ecpg_log("raising sqlstate %.*s (sqlcode %ld): %s\n",
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(int) sizeof(sqlca->sqlstate), sqlca->sqlstate, sqlca->sqlcode, sqlca->sqlerrm.sqlerrmc);
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/* free all memory we have allocated for the user */
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ECPGfree_auto_mem();
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}
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/* filter out all error codes */
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bool
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ecpg_check_PQresult(PGresult *results, int lineno, PGconn *connection, enum COMPAT_MODE compat)
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{
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if (results == NULL)
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{
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ecpg_log("ecpg_check_PQresult on line %d: no result - %s", lineno, PQerrorMessage(connection));
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ecpg_raise_backend(lineno, NULL, connection, compat);
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return false;
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}
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switch (PQresultStatus(results))
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{
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case PGRES_TUPLES_OK:
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return true;
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break;
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case PGRES_EMPTY_QUERY:
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/* do nothing */
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ecpg_raise(lineno, ECPG_EMPTY, ECPG_SQLSTATE_ECPG_INTERNAL_ERROR, NULL);
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PQclear(results);
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return false;
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break;
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case PGRES_COMMAND_OK:
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return true;
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break;
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case PGRES_NONFATAL_ERROR:
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case PGRES_FATAL_ERROR:
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case PGRES_BAD_RESPONSE:
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ecpg_log("ecpg_check_PQresult on line %d: bad response - %s", lineno, PQresultErrorMessage(results));
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ecpg_raise_backend(lineno, results, connection, compat);
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PQclear(results);
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return false;
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break;
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case PGRES_COPY_OUT:
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return true;
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break;
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case PGRES_COPY_IN:
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ecpg_log("ecpg_check_PQresult on line %d: COPY IN data transfer in progress\n", lineno);
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PQendcopy(connection);
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PQclear(results);
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return false;
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break;
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default:
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ecpg_log("ecpg_check_PQresult on line %d: unknown execution status type\n",
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lineno);
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ecpg_raise_backend(lineno, results, connection, compat);
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PQclear(results);
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return false;
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break;
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}
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}
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/* print out an error message */
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void
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sqlprint(void)
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{
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struct sqlca_t *sqlca = ECPGget_sqlca();
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if (sqlca == NULL)
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{
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ecpg_log("out of memory");
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return;
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}
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sqlca->sqlerrm.sqlerrmc[sqlca->sqlerrm.sqlerrml] = '\0';
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fprintf(stderr, ecpg_gettext("SQL error: %s\n"), sqlca->sqlerrm.sqlerrmc);
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}
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