/*
* Attempt to parse the line as a timezone abbrev spec (name, offset, dst)
*
* Returns TRUE if OK, else false; data is stored in *tzentry
*/
static bool
splitTzLine(const char *filename, int lineno, char *line, tzEntry *tzentry)
{
char *abbrev;
char *offset;
char *offset_endptr;
char *remain;
char *is_dst;
tzentry->lineno = lineno;
tzentry->filename = filename;
abbrev = strtok(line, WHITESPACE);
if (!abbrev)
{
GUC_check_errmsg("missing time zone abbreviation in time zone file \"%s\", line %d",
filename, lineno);
return false;
}
tzentry->abbrev = abbrev;
offset = strtok(NULL, WHITESPACE);
if (!offset)
{
GUC_check_errmsg("missing time zone offset in time zone file \"%s\", line %d",
filename, lineno);
return false;
}
tzentry->offset = strtol(offset, &offset_endptr, 10);
if (offset_endptr == offset || *offset_endptr != '\0')
{
GUC_check_errmsg("invalid number for time zone offset in time zone file \"%s\", line %d",
filename, lineno);
return false;
}
is_dst = strtok(NULL, WHITESPACE);
if (is_dst && pg_strcasecmp(is_dst, "D") == 0)
{
tzentry->is_dst = true;
remain = strtok(NULL, WHITESPACE);
}
else
{
/* there was no 'D' dst specifier */
tzentry->is_dst = false;
remain = is_dst;
}
if (!remain) /* no more non-whitespace chars */
return true;
if (remain[0] != '#') /* must be a comment */
{
GUC_check_errmsg("invalid syntax in time zone file \"%s\", line %d",
filename, lineno);
return false;
}
return true;
}
/*
* Apply additional validation checks to a tzEntry
*
* Returns TRUE if OK, else false
*/
static bool
validateTzEntry(tzEntry *tzentry)
{
unsigned char *p;
/*
* Check restrictions imposed by datetkntbl storage format (see
* datetime.c)
*/
if (strlen(tzentry->abbrev) > TOKMAXLEN)
{
GUC_check_errmsg("time zone abbreviation \"%s\" is too long (maximum %d characters) in time zone file \"%s\", line %d",
tzentry->abbrev, TOKMAXLEN,
tzentry->filename, tzentry->lineno);
return false;
}
if (tzentry->offset % 900 != 0)
{
GUC_check_errmsg("time zone offset %d is not a multiple of 900 sec (15 min) in time zone file \"%s\", line %d",
tzentry->offset,
tzentry->filename, tzentry->lineno);
return false;
}
/*
* Sanity-check the offset: shouldn't exceed 14 hours
*/
if (tzentry->offset > 14 * 60 * 60 ||
tzentry->offset < -14 * 60 * 60)
{
GUC_check_errmsg("time zone offset %d is out of range in time zone file \"%s\", line %d",
tzentry->offset,
tzentry->filename, tzentry->lineno);
return false;
}
/*
* Convert abbrev to lowercase (must match datetime.c's conversion)
*/
for (p = (unsigned char *) tzentry->abbrev; *p; p++)
*p = pg_tolower(*p);
return true;
}
static bool check_enabled(
bool *newval, void **extra, GucSource source)
{
if ( initstage < IS_PLJAVA_ENABLED )
return true;
if ( *newval )
return true;
GUC_check_errmsg(
"too late to change \"pljava.enable\" setting");
GUC_check_errdetail(
"Start-up has progressed past the point where it is checked.");
GUC_check_errhint(
"For another chance, exit this session and start a new one.");
return false;
}
static bool check_classpath(
char **newval, void **extra, GucSource source)
{
if ( initstage < IS_JAVAVM_OPTLIST )
return true;
if ( classpath == *newval )
return true;
if ( classpath && *newval && 0 == strcmp(classpath, *newval) )
return true;
GUC_check_errmsg(
"too late to change \"pljava.classpath\" setting");
GUC_check_errdetail(
"Changing the setting has no effect after "
"PL/Java has started the Java virtual machine.");
GUC_check_errhint(
"To try a different value, exit this session and start a new one.");
return false;
}
static bool check_libjvm_location(
char **newval, void **extra, GucSource source)
{
if ( initstage < IS_CAND_JVMOPENED )
return true;
if ( libjvmlocation == *newval )
return true;
if ( libjvmlocation && *newval && 0 == strcmp(libjvmlocation, *newval) )
return true;
GUC_check_errmsg(
"too late to change \"pljava.libjvm_location\" setting");
GUC_check_errdetail(
"Changing the setting can have no effect after "
"PL/Java has found and opened the library it points to.");
GUC_check_errhint(
"To try a different value, exit this session and start a new one.");
return false;
}
/*
* Attempt to parse the line as a timezone abbrev spec
*
* Valid formats are:
* name zone
* name offset dst
*
* Returns TRUE if OK, else false; data is stored in *tzentry
*/
static bool
splitTzLine(const char *filename, int lineno, char *line, tzEntry *tzentry)
{
char *abbrev;
char *offset;
char *offset_endptr;
char *remain;
char *is_dst;
tzentry->lineno = lineno;
tzentry->filename = filename;
abbrev = strtok(line, WHITESPACE);
if (!abbrev)
{
GUC_check_errmsg("missing time zone abbreviation in time zone file \"%s\", line %d",
filename, lineno);
return false;
}
tzentry->abbrev = pstrdup(abbrev);
offset = strtok(NULL, WHITESPACE);
if (!offset)
{
GUC_check_errmsg("missing time zone offset in time zone file \"%s\", line %d",
filename, lineno);
return false;
}
/* We assume zone names don't begin with a digit or sign */
if (isdigit((unsigned char) *offset) || *offset == '+' || *offset == '-')
{
tzentry->zone = NULL;
tzentry->offset = strtol(offset, &offset_endptr, 10);
if (offset_endptr == offset || *offset_endptr != '\0')
{
GUC_check_errmsg("invalid number for time zone offset in time zone file \"%s\", line %d",
filename, lineno);
return false;
}
is_dst = strtok(NULL, WHITESPACE);
if (is_dst && pg_strcasecmp(is_dst, "D") == 0)
{
tzentry->is_dst = true;
remain = strtok(NULL, WHITESPACE);
}
else
{
/* there was no 'D' dst specifier */
tzentry->is_dst = false;
remain = is_dst;
}
}
else
{
/*
* Assume entry is a zone name. We do not try to validate it by
* looking up the zone, because that would force loading of a lot of
* zones that probably will never be used in the current session.
*/
tzentry->zone = pstrdup(offset);
tzentry->offset = 0;
tzentry->is_dst = false;
remain = strtok(NULL, WHITESPACE);
}
if (!remain) /* no more non-whitespace chars */
return true;
if (remain[0] != '#') /* must be a comment */
{
GUC_check_errmsg("invalid syntax in time zone file \"%s\", line %d",
filename, lineno);
return false;
}
return true;
}
