Esempio n. 1
0
/*
 * strip_quotes
 *
 * Remove quotes from the string at *source.  Leading and trailing occurrences
 * of 'quote' are removed; embedded double occurrences of 'quote' are reduced
 * to single occurrences; if 'escape' is not 0 then 'escape' removes special
 * significance of next character.
 *
 * Note that the source string is overwritten in-place.
 */
static void
strip_quotes(char *source, char quote, char escape, int encoding)
{
	char	   *src;
	char	   *dst;

	psql_assert(source);
	psql_assert(quote);

	src = dst = source;

	if (*src && *src == quote)
		src++;					/* skip leading quote */

	while (*src)
	{
		char		c = *src;
		int			i;

		if (c == quote && src[1] == '\0')
			break;				/* skip trailing quote */
		else if (c == quote && src[1] == quote)
			src++;				/* process doubled quote */
		else if (c == escape && src[1] != '\0')
			src++;				/* process escaped character */

		i = PQmblen(src, encoding);
		while (i--)
			*dst++ = *src++;
	}

	*dst = '\0';
}
Esempio n. 2
0
File: command.c Progetto: 50wu/gpdb
backslashResult
HandleSlashCmds(PsqlScanState scan_state,
				PQExpBuffer query_buf)
{
	backslashResult status = PSQL_CMD_SKIP_LINE;
	char	   *cmd;
	char	   *arg;

	psql_assert(scan_state);

	/* Parse off the command name */
	cmd = psql_scan_slash_command(scan_state);

	/* And try to execute it */
	status = exec_command(cmd, scan_state, query_buf);

	if (status == PSQL_CMD_UNKNOWN)
	{
		if (pset.cur_cmd_interactive)
			fprintf(stderr, _("Invalid command \\%s. Try \\? for help.\n"), cmd);
		else
			psql_error("invalid command \\%s\n", cmd);
		status = PSQL_CMD_ERROR;
	}

	if (status != PSQL_CMD_ERROR)
	{
		/* eat any remaining arguments after a valid command */
		/* note we suppress evaluation of backticks here */
		while ((arg = psql_scan_slash_option(scan_state,
											 OT_VERBATIM, NULL, false)))
		{
			psql_error("\\%s: extra argument \"%s\" ignored\n", cmd, arg);
			free(arg);
		}
	}
	else
	{
		/* silently throw away rest of line after an erroneous command */
		while ((arg = psql_scan_slash_option(scan_state,
											 OT_WHOLE_LINE, NULL, false)))
			free(arg);
	}

	/* if there is a trailing \\, swallow it */
	psql_scan_slash_command_end(scan_state);

	free(cmd);

	/* some commands write to queryFout, so make sure output is sent */
	fflush(pset.queryFout);

	return status;
}
Esempio n. 3
0
File: command.c Progetto: 50wu/gpdb
static bool
editFile(const char *fname)
{
	const char *editorName;
	char	   *sys;
	int			result;

	psql_assert(fname);

	/* Find an editor to use */
	editorName = getenv("PSQL_EDITOR");
	if (!editorName)
		editorName = getenv("EDITOR");
	if (!editorName)
		editorName = getenv("VISUAL");
	if (!editorName)
		editorName = DEFAULT_EDITOR;

	/*
	 * On Unix the EDITOR value should *not* be quoted, since it might include
	 * switches, eg, EDITOR="pico -t"; it's up to the user to put quotes in it
	 * if necessary.  But this policy is not very workable on Windows, due to
	 * severe brain damage in their command shell plus the fact that standard
	 * program paths include spaces.
	 */
	sys = pg_malloc(strlen(editorName) + strlen(fname) + 10 + 1);
#ifndef WIN32
	sprintf(sys, "exec %s '%s'", editorName, fname);
#else
	sprintf(sys, SYSTEMQUOTE "\"%s\" \"%s\"" SYSTEMQUOTE, editorName, fname);
#endif
	result = system(sys);
	if (result == -1)
		psql_error("could not start editor \"%s\"\n", editorName);
	else if (result == 127)
		psql_error("could not start /bin/sh\n");
	free(sys);

	return result == 0;
}
Esempio n. 4
0
File: common.c Progetto: GisKook/Gis
/*
 * ExecQueryUsingCursor: run a SELECT-like query using a cursor
 *
 * This feature allows result sets larger than RAM to be dealt with.
 *
 * Returns true if the query executed successfully, false otherwise.
 *
 * If pset.timing is on, total query time (exclusive of result-printing) is
 * stored into *elapsed_msec.
 */
static bool
ExecQueryUsingCursor(const char *query, double *elapsed_msec)
{
	bool		OK = true;
	PGresult   *results;
	PQExpBufferData buf;
	printQueryOpt my_popt = pset.popt;
	FILE	   *queryFout_copy = pset.queryFout;
	bool		queryFoutPipe_copy = pset.queryFoutPipe;
	bool		started_txn = false;
	bool		did_pager = false;
	int			ntuples;
	char		fetch_cmd[64];
	instr_time	before,
				after;
	int			flush_error;

	*elapsed_msec = 0;

	/* initialize print options for partial table output */
	my_popt.topt.start_table = true;
	my_popt.topt.stop_table = false;
	my_popt.topt.prior_records = 0;

	if (pset.timing)
		INSTR_TIME_SET_CURRENT(before);

	/* if we're not in a transaction, start one */
	if (PQtransactionStatus(pset.db) == PQTRANS_IDLE)
	{
		results = PQexec(pset.db, "BEGIN");
		OK = AcceptResult(results) &&
			(PQresultStatus(results) == PGRES_COMMAND_OK);
		PQclear(results);
		if (!OK)
			return false;
		started_txn = true;
	}

	/* Send DECLARE CURSOR */
	initPQExpBuffer(&buf);
	appendPQExpBuffer(&buf, "DECLARE _psql_cursor NO SCROLL CURSOR FOR\n%s",
					  query);

	results = PQexec(pset.db, buf.data);
	OK = AcceptResult(results) &&
		(PQresultStatus(results) == PGRES_COMMAND_OK);
	PQclear(results);
	termPQExpBuffer(&buf);
	if (!OK)
		goto cleanup;

	if (pset.timing)
	{
		INSTR_TIME_SET_CURRENT(after);
		INSTR_TIME_SUBTRACT(after, before);
		*elapsed_msec += INSTR_TIME_GET_MILLISEC(after);
	}

	snprintf(fetch_cmd, sizeof(fetch_cmd),
			 "FETCH FORWARD %d FROM _psql_cursor",
			 pset.fetch_count);

	/* prepare to write output to \g argument, if any */
	if (pset.gfname)
	{
		/* keep this code in sync with PrintQueryTuples */
		pset.queryFout = stdout;	/* so it doesn't get closed */

		/* open file/pipe */
		if (!setQFout(pset.gfname))
		{
			pset.queryFout = queryFout_copy;
			pset.queryFoutPipe = queryFoutPipe_copy;
			OK = false;
			goto cleanup;
		}
	}

	/* clear any pre-existing error indication on the output stream */
	clearerr(pset.queryFout);

	for (;;)
	{
		if (pset.timing)
			INSTR_TIME_SET_CURRENT(before);

		/* get FETCH_COUNT tuples at a time */
		results = PQexec(pset.db, fetch_cmd);

		if (pset.timing)
		{
			INSTR_TIME_SET_CURRENT(after);
			INSTR_TIME_SUBTRACT(after, before);
			*elapsed_msec += INSTR_TIME_GET_MILLISEC(after);
		}

		if (PQresultStatus(results) != PGRES_TUPLES_OK)
		{
			/* shut down pager before printing error message */
			if (did_pager)
			{
				ClosePager(pset.queryFout);
				pset.queryFout = queryFout_copy;
				pset.queryFoutPipe = queryFoutPipe_copy;
				did_pager = false;
			}

			OK = AcceptResult(results);
			psql_assert(!OK);
			PQclear(results);
			break;
		}

		ntuples = PQntuples(results);

		if (ntuples < pset.fetch_count)
		{
			/* this is the last result set, so allow footer decoration */
			my_popt.topt.stop_table = true;
		}
		else if (pset.queryFout == stdout && !did_pager)
		{
			/*
			 * If query requires multiple result sets, hack to ensure that
			 * only one pager instance is used for the whole mess
			 */
			pset.queryFout = PageOutput(100000, my_popt.topt.pager);
			did_pager = true;
		}

		printQuery(results, &my_popt, pset.queryFout, pset.logfile);

		PQclear(results);

		/* after the first result set, disallow header decoration */
		my_popt.topt.start_table = false;
		my_popt.topt.prior_records += ntuples;

		/*
		 * Make sure to flush the output stream, so intermediate results are
		 * visible to the client immediately.  We check the results because if
		 * the pager dies/exits/etc, there's no sense throwing more data at
		 * it.
		 */
		flush_error = fflush(pset.queryFout);

		/*
		 * Check if we are at the end, if a cancel was pressed, or if there
		 * were any errors either trying to flush out the results, or more
		 * generally on the output stream at all.  If we hit any errors
		 * writing things to the stream, we presume $PAGER has disappeared and
		 * stop bothering to pull down more data.
		 */
		if (ntuples < pset.fetch_count || cancel_pressed || flush_error ||
			ferror(pset.queryFout))
			break;
	}

	/* close \g argument file/pipe, restore old setting */
	if (pset.gfname)
	{
		/* keep this code in sync with PrintQueryTuples */
		setQFout(NULL);

		pset.queryFout = queryFout_copy;
		pset.queryFoutPipe = queryFoutPipe_copy;

		free(pset.gfname);
		pset.gfname = NULL;
	}
	else if (did_pager)
	{
		ClosePager(pset.queryFout);
		pset.queryFout = queryFout_copy;
		pset.queryFoutPipe = queryFoutPipe_copy;
	}

cleanup:
	if (pset.timing)
		INSTR_TIME_SET_CURRENT(before);

	/*
	 * We try to close the cursor on either success or failure, but on failure
	 * ignore the result (it's probably just a bleat about being in an aborted
	 * transaction)
	 */
	results = PQexec(pset.db, "CLOSE _psql_cursor");
	if (OK)
	{
		OK = AcceptResult(results) &&
			(PQresultStatus(results) == PGRES_COMMAND_OK);
	}
	PQclear(results);

	if (started_txn)
	{
		results = PQexec(pset.db, OK ? "COMMIT" : "ROLLBACK");
		OK &= AcceptResult(results) &&
			(PQresultStatus(results) == PGRES_COMMAND_OK);
		PQclear(results);
	}

	if (pset.timing)
	{
		INSTR_TIME_SET_CURRENT(after);
		INSTR_TIME_SUBTRACT(after, before);
		*elapsed_msec += INSTR_TIME_GET_MILLISEC(after);
	}

	return OK;
}
Esempio n. 5
0
File: command.c Progetto: 50wu/gpdb
bool
do_pset(const char *param, const char *value, printQueryOpt *popt, bool quiet)
{
	size_t		vallen = 0;

	psql_assert(param);

	if (value)
		vallen = strlen(value);

	/* set format */
	if (strcmp(param, "format") == 0)
	{
		if (!value)
			;
		else if (pg_strncasecmp("unaligned", value, vallen) == 0)
			popt->topt.format = PRINT_UNALIGNED;
		else if (pg_strncasecmp("aligned", value, vallen) == 0)
			popt->topt.format = PRINT_ALIGNED;
		else if (pg_strncasecmp("wrapped", value, vallen) == 0)
			popt->topt.format = PRINT_WRAPPED;
		else if (pg_strncasecmp("html", value, vallen) == 0)
			popt->topt.format = PRINT_HTML;
		else if (pg_strncasecmp("latex", value, vallen) == 0)
			popt->topt.format = PRINT_LATEX;
		else if (pg_strncasecmp("troff-ms", value, vallen) == 0)
			popt->topt.format = PRINT_TROFF_MS;
		else
		{
			psql_error("\\pset: allowed formats are unaligned, aligned, wrapped, html, latex, troff-ms\n");
			return false;
		}

		if (!quiet)
			printf(_("Output format is %s.\n"), _align2string(popt->topt.format));
	}

	/* set table line style */
	else if (strcmp(param, "linestyle") == 0)
	{
		if (!value)
			;
		else if (pg_strncasecmp("ascii", value, vallen) == 0)
			popt->topt.line_style = &pg_asciiformat;
		else if (pg_strncasecmp("old-ascii", value, vallen) == 0)
			popt->topt.line_style = &pg_asciiformat_old;
		else if (pg_strncasecmp("unicode", value, vallen) == 0)
			popt->topt.line_style = &pg_utf8format;
		else
		{
			psql_error("\\pset: allowed line styles are ascii, old-ascii, unicode\n");
			return false;
		}

		if (!quiet)
			printf(_("Line style is %s.\n"),
				   get_line_style(&popt->topt)->name);
	}

	/* set border style/width */
	else if (strcmp(param, "border") == 0)
	{
		if (value)
			popt->topt.border = atoi(value);

		if (!quiet)
			printf(_("Border style is %d.\n"), popt->topt.border);
	}

	/* set expanded/vertical mode */
	else if (strcmp(param, "x") == 0 || strcmp(param, "expanded") == 0 || strcmp(param, "vertical") == 0)
	{
		if (value)
			popt->topt.expanded = ParseVariableBool(value);
		else
			popt->topt.expanded = !popt->topt.expanded;
		if (!quiet)
			printf(popt->topt.expanded
				   ? _("Expanded display is on.\n")
				   : _("Expanded display is off.\n"));
	}

	/* locale-aware numeric output */
	else if (strcmp(param, "numericlocale") == 0)
	{
		if (value)
			popt->topt.numericLocale = ParseVariableBool(value);
		else
			popt->topt.numericLocale = !popt->topt.numericLocale;
		if (!quiet)
		{
			if (popt->topt.numericLocale)
				puts(_("Showing locale-adjusted numeric output."));
			else
				puts(_("Locale-adjusted numeric output is off."));
		}
	}

	/* null display */
	else if (strcmp(param, "null") == 0)
	{
		if (value)
		{
			free(popt->nullPrint);
			popt->nullPrint = pg_strdup(value);
		}
		if (!quiet)
			printf(_("Null display is \"%s\".\n"), popt->nullPrint ? popt->nullPrint : "");
	}

	/* field separator for unaligned text */
	else if (strcmp(param, "fieldsep") == 0)
	{
		if (value)
		{
			free(popt->topt.fieldSep);
			popt->topt.fieldSep = pg_strdup(value);
		}
		if (!quiet)
			printf(_("Field separator is \"%s\".\n"), popt->topt.fieldSep);
	}

	/* record separator for unaligned text */
	else if (strcmp(param, "recordsep") == 0)
	{
		if (value)
		{
			free(popt->topt.recordSep);
			popt->topt.recordSep = pg_strdup(value);
		}
		if (!quiet)
		{
			if (strcmp(popt->topt.recordSep, "\n") == 0)
				printf(_("Record separator is <newline>."));
			else
				printf(_("Record separator is \"%s\".\n"), popt->topt.recordSep);
		}
	}

	/* toggle between full and tuples-only format */
	else if (strcmp(param, "t") == 0 || strcmp(param, "tuples_only") == 0)
	{
		if (value)
			popt->topt.tuples_only = ParseVariableBool(value);
		else
			popt->topt.tuples_only = !popt->topt.tuples_only;
		if (!quiet)
		{
			if (popt->topt.tuples_only)
				puts(_("Showing only tuples."));
			else
				puts(_("Tuples only is off."));
		}
	}

	/* set title override */
	else if (strcmp(param, "title") == 0)
	{
		free(popt->title);
		if (!value)
			popt->title = NULL;
		else
			popt->title = pg_strdup(value);

		if (!quiet)
		{
			if (popt->title)
				printf(_("Title is \"%s\".\n"), popt->title);
			else
				printf(_("Title is unset.\n"));
		}
	}

	/* set HTML table tag options */
	else if (strcmp(param, "T") == 0 || strcmp(param, "tableattr") == 0)
	{
		free(popt->topt.tableAttr);
		if (!value)
			popt->topt.tableAttr = NULL;
		else
			popt->topt.tableAttr = pg_strdup(value);

		if (!quiet)
		{
			if (popt->topt.tableAttr)
				printf(_("Table attribute is \"%s\".\n"), popt->topt.tableAttr);
			else
				printf(_("Table attributes unset.\n"));
		}
	}

	/* toggle use of pager */
	else if (strcmp(param, "pager") == 0)
	{
		if (value && pg_strcasecmp(value, "always") == 0)
			popt->topt.pager = 2;
		else if (value)
			if (ParseVariableBool(value))
				popt->topt.pager = 1;
			else
				popt->topt.pager = 0;
		else if (popt->topt.pager == 1)
			popt->topt.pager = 0;
		else
			popt->topt.pager = 1;
		if (!quiet)
		{
			if (popt->topt.pager == 1)
				puts(_("Pager is used for long output."));
			else if (popt->topt.pager == 2)
				puts(_("Pager is always used."));
			else
				puts(_("Pager usage is off."));
		}
	}

	/* disable "(x rows)" footer */
	else if (strcmp(param, "footer") == 0)
	{
		if (value)
			popt->default_footer = ParseVariableBool(value);
		else
			popt->default_footer = !popt->default_footer;
		if (!quiet)
		{
			if (popt->default_footer)
				puts(_("Default footer is on."));
			else
				puts(_("Default footer is off."));
		}
	}

	/* set border style/width */
	else if (strcmp(param, "columns") == 0)
	{
		if (value)
			popt->topt.columns = atoi(value);

		if (!quiet)
			printf(_("Target width for \"wrapped\" format is %d.\n"), popt->topt.columns);
	}

	else
	{
		psql_error("\\pset: unknown option: %s\n", param);
		return false;
	}

	return true;
}