mirror/postgresql
2
0
Fork 0
mirror of https://git.postgresql.org/git/postgresql.git synced 2025-03-07 19:47:50 +08:00
Code Issues Packages Projects Releases Wiki Activity

Fix postgresql.conf lexer to accept doubled single quotes in literal

Browse Source 
strings.  This is consistent with SQL conventions, and since Bruce
already changed initdb in a way that assumed it worked like this, seems
we'd better make it work like this.
This commit is contained in:
Tom Lane 2005-09-21 20:33:34 +00:00
parent dbf952860e
commit 1128f55659
2 changed files with 36 additions and 34 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
doc/src/sgml/config.sgml
View File

@ -1,5 +1,5 @@
<!--
$PostgreSQL: pgsql/doc/src/sgml/config.sgml,v 1.18 2005/09/19 17:21:46 momjian Exp $
$PostgreSQL: pgsql/doc/src/sgml/config.sgml,v 1.19 2005/09/21 20:33:33 tgl Exp $
-->
<chapter Id="runtime-config">
<title>Run-time Configuration</title>
@ -45,7 +45,8 @@ search_path = '$user, public'
value is optional. Whitespace is insignificant and blank lines are
ignored. Hash marks (<literal>#</literal>) introduce comments
anywhere. Parameter values that are not simple identifiers or
numbers must be single-quoted.
numbers must be single-quoted. To embed a single quote in a parameter
value, write either two quotes (preferred) or backslash-quote.
</para>
<para>

65
src/backend/utils/misc/guc-file.l
View File

@ -4,7 +4,7 @@
*
* Copyright (c) 2000-2005, PostgreSQL Global Development Group
*
* $PostgreSQL: pgsql/src/backend/utils/misc/guc-file.l,v 1.31 2005/07/08 18:41:40 tgl Exp $
* $PostgreSQL: pgsql/src/backend/utils/misc/guc-file.l,v 1.32 2005/09/21 20:33:34 tgl Exp $
*/
%{
@ -38,7 +38,7 @@ enum {
/* prototype, so compiler is happy with our high warnings setting */
int GUC_yylex(void);
static char *GUC_scanstr(char *);
static char *GUC_scanstr(const char *s);
%}
%option 8bit
@ -64,7 +64,7 @@ ID {LETTER}{LETTER_OR_DIGIT}*
QUALIFIED_ID {ID}"."{ID}
UNQUOTED_STRING {LETTER}({LETTER_OR_DIGIT}|[-._:/])*
STRING \'([^'\n]|\\.)*\'
STRING \'([^'\\\n]|\\.|\'\')*\'
%%
@ -181,22 +181,16 @@ ProcessConfigFile(GucContext context)
if (token == GUC_EQUALS)
token = yylex();
if (token != GUC_ID && token != GUC_STRING &&
if (token != GUC_ID &&
token != GUC_STRING &&
token != GUC_INTEGER &&
token != GUC_REAL &&
token != GUC_UNQUOTED_STRING)
goto parse_error;
opt_value = pstrdup(yytext);
if (token == GUC_STRING)
{
/* remove the beginning and ending quote/apostrophe */
/* first: shift the whole thing down one character */
memmove(opt_value, opt_value+1, strlen(opt_value)-1);
/* second: null out the 2 characters we shifted */
opt_value[strlen(opt_value)-2] = '\0';
/* do the escape thing. pfree()'s the pstrdup above */
opt_value = GUC_scanstr(opt_value);
}
if (token == GUC_STRING) /* strip quotes and escapes */
opt_value = GUC_scanstr(yytext);
else
opt_value = pstrdup(yytext);
parse_state = 2;
break;
@ -280,34 +274,33 @@ ProcessConfigFile(GucContext context)
/* ----------------
/*
* scanstr
*
* if the string passed in has escaped codes, map the escape codes to actual
* chars
* Strip the quotes surrounding the given string, and collapse any embedded
* '' sequences and backslash escapes.
*
* the string returned is palloc'd and should eventually be pfree'd by the
* caller; also we assume we should pfree the input string.
* ----------------
* caller.
*/
static char *
GUC_scanstr(char *s)
GUC_scanstr(const char *s)
{
char *newStr;
int len,
i,
j;
if (s == NULL || s[0] == '\0')
{
if (s != NULL)
pfree(s);
return pstrdup("");
}
Assert(s != NULL && s[0] == '\'');
len = strlen(s);
Assert(len >= 2);
Assert(s[len-1] == '\'');
newStr = palloc(len + 1); /* string cannot get longer */
/* Skip the leading quote; we'll handle the trailing quote below */
s++, len--;
/* Since len still includes trailing quote, this is enough space */
newStr = palloc(len);
for (i = 0, j = 0; i < len; i++)
{
@ -354,13 +347,21 @@ GUC_scanstr(char *s)
default:
newStr[j] = s[i];
break;
}
} /* switch */
}
else if (s[i] == '\'' && s[i+1] == '\'')
{
/* doubled quote becomes just one quote */
newStr[j] = s[++i];
}
else
newStr[j] = s[i];
j++;
}
newStr[j] = '\0';
pfree(s);
/* We copied the ending quote to newStr, so replace with \0 */
Assert(j > 0 && j <= len);
newStr[--j] = '\0';
return newStr;
}