Change quickdie elog notice to a single message.

Clean up FloatExceptionHandler elog message source code.

src/backend/tcop/postgres.c

@@ -7,7 +7,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/tcop/postgres.c,v 1.53 1997/11/09 04:47:09 scrappy Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/tcop/postgres.c,v 1.54 1997/11/10 15:24:55 thomas Exp $
  *
  * NOTES
  *	  this is the "main" module of the postgres backend and
@@ -728,8 +728,9 @@ pg_eval_dest(char *query_string,/* string to execute */
  *		handle_warn() is used to catch kill(getpid(),1) which
  *		occurs when elog(WARN) is called.
  *
- *		quickdie() occurs when signalled by the postmaster, some backend
- *		has bought the farm we need to stop what we're doing and exit.
+ *		quickdie() occurs when signalled by the postmaster.
+ *		Some backend has bought the farm,
+ *		so we need to stop what we're doing and exit.
  *
  *		die() preforms an orderly cleanup via ExitPostgres()
  * --------------------------------
@@ -744,12 +745,12 @@ handle_warn(SIGNAL_ARGS)
 static void
 quickdie(SIGNAL_ARGS)
 {
-	elog(NOTICE, "Message from PostgreSQL backend:  The Postmaster has ");
-	elog(NOTICE, "informed me that some other backend died abnormally and ");
-	elog(NOTICE, "possibly corrupted shared memory.  I have rolled back ");
-	elog(NOTICE, "the current transaction and am going to terminate your ");
-	elog(NOTICE, "database system connection and exit.  Please reconnect to");
-	elog(NOTICE, "the database system and repeat your query.");
+	elog(NOTICE, "Message from PostgreSQL backend:"
+		"\n\tThe Postmaster has informed me that some other backend"
+		" died abnormally and possibly corrupted shared memory."
+		"\n\tI have rolled back the current transaction and am"
+		" going to terminate your database system connection and exit."
+		"\n\tPlease reconnect to the database system and repeat your query.");
 
 
 	/*
@@ -771,8 +772,9 @@ die(SIGNAL_ARGS)
 static void
 FloatExceptionHandler(SIGNAL_ARGS)
 {
-	elog(WARN, "floating point exception! the last floating point operation eit\
-her exceeded legal ranges or was a divide by zero");
+	elog(WARN, "floating point exception!"
+		" The last floating point operation either exceeded legal ranges"
+		" or was a divide by zero");
 }
 
 
@@ -1339,7 +1341,7 @@ PostgresMain(int argc, char *argv[])
 	if (IsUnderPostmaster == false)
 	{
 		puts("\nPOSTGRES backend interactive interface");
-		puts("$Revision: 1.53 $ $Date: 1997/11/09 04:47:09 $");
+		puts("$Revision: 1.54 $ $Date: 1997/11/10 15:24:55 $");
 	}
 
 	/* ----------------

src/backend/tcop/variable.c

@@ -2,7 +2,7 @@
  * Routines for handling of 'SET var TO',
  *  'SHOW var' and 'RESET var' statements.
  *
- * $Id: variable.c,v 1.19 1997/11/07 06:43:16 thomas Exp $
+ * $Id: variable.c,v 1.20 1997/11/10 15:24:56 thomas Exp $
  *
  */
 
@@ -431,8 +431,13 @@ reset_date()
 	return TRUE;
 }
 
+/* Timezone support
+ * Working storage for strings is allocated with an arbitrary size of 64 bytes.
+ */
+
 static char *defaultTZ = NULL;
-static char TZvalue[10];
+static char TZvalue[64];
+static char tzbuf[64];
 
 bool
 parse_timezone(const char *value)
@@ -447,20 +452,30 @@ parse_timezone(const char *value)
 
 	while ((value = get_token(&tok, NULL, value)) != 0)
 	{
-		if ((defaultTZ == NULL) && (getenv("TZ") != NULL))
+		/* Not yet tried to save original value from environment? */
+		if (defaultTZ == NULL)
+		{
+			/* found something? then save it for later */
+			if (getenv("TZ") != NULL)
 			{
 				defaultTZ = getenv("TZ");
 				if (defaultTZ == NULL)
-			{
 					defaultTZ = (char *) -1;
+				else
+					strcpy(TZvalue, defaultTZ);
 			}
+			/* found nothing so mark with an invalid pointer */
 			else
 			{
-				strcpy(TZvalue, defaultTZ);
+				defaultTZ = (char *) -1;
 			}
 		}
 
-		setenv("TZ", tok, TRUE);
+		strcpy(tzbuf, "TZ=");
+		strcat(tzbuf, tok);
+		if (putenv(tzbuf) != 0)
+			elog(WARN, "Unable to set TZ environment variable to %s", tok);
+
 		tzset();
 		PFREE(tok);
 	}
@@ -471,29 +486,39 @@ parse_timezone(const char *value)
 bool
 show_timezone()
 {
-	char		buf[64];
 	char	   *tz;
 
 	tz = getenv("TZ");
 
-	strcpy(buf, "Time zone is ");
-	strcat(buf, ((tz != NULL)? tz: "unknown"));
-
-	elog(NOTICE, buf, NULL);
+	elog(NOTICE, "Time zone is %s", ((tz != NULL)? tz: "unknown"));
 
 	return TRUE;
 } /* show_timezone() */
 
+/* reset_timezone()
+ * Set TZ environment variable to original value.
+ * Note that if TZ was originally not set, TZ should be cleared.
+ * unsetenv() works fine, but is BSD, not POSIX, and is not available
+ * under Solaris, among others. Apparently putenv() called as below
+ * clears the process-specific environment variables.
+ * Other reasonable arguments to putenv() (e.g. "TZ=", "TZ", "") result
+ * in a core dump (under Linux anyway).
+ */
 bool
 reset_timezone()
 {
 	if ((defaultTZ != NULL) && (defaultTZ != (char *) -1))
 	{
-		setenv("TZ", TZvalue, TRUE);
+		strcpy(tzbuf, "TZ=");
+		strcat(tzbuf, TZvalue);
+		if (putenv(tzbuf) != 0)
+			elog(WARN, "Unable to set TZ environment variable to %s", TZvalue);
 	}
 	else
 	{
-		unsetenv("TZ");
+		strcpy(tzbuf, "=");
+		if (putenv(tzbuf) != 0)
+			elog(WARN, "Unable to clear TZ environment variable", NULL);
 	}
 	tzset();