From bf53d5c208a3bdce243a38666fc50f5418c78c3b Mon Sep 17 00:00:00 2001
From: Tom Lane
Date: Mon, 14 Mar 2016 10:41:29 -0400
Subject: Teach the configure script to validate its --with-pgport argument.

Previously, configure would take any string, including an empty string,
leading to obscure compile failures in guc.c.  It seems worth expending
a few lines of code to ensure that the argument is a decimal number
between 1 and 65535.

Report and patch by Jim Nasby; reviews by Alex Shulgin, Peter Eisentraut,
Ivan Kartyshov
---
 configure.in | 11 +++++++++++
 1 file changed, 11 insertions(+)

(limited to 'configure.in')

diff --git a/configure.in b/configure.in
index 0bd90d75019..0b7dd97506a 100644
--- a/configure.in
+++ b/configure.in
@@ -165,6 +165,17 @@ AC_DEFINE_UNQUOTED(DEF_PGPORT_STR, "${default_port}",
                    [Define to the default TCP port number as a string constant.])
 AC_SUBST(default_port)
 
+# It's worth validating port; you can get very confusing errors otherwise
+if test x"$default_port" = x""; then
+  AC_MSG_ERROR([invalid --with-pgport specification: empty string])
+elif test ! x`echo "$default_port" | sed -e 's/[[0-9]]*//'` = x""; then
+  AC_MSG_ERROR([invalid --with-pgport specification: must be a number])
+elif test ! x`echo "$default_port" | sed -e 's/^0.//'` = x"$default_port"; then
+  AC_MSG_ERROR([invalid --with-pgport specification: must not have leading 0])
+elif test "$default_port" -lt "1" -o "$default_port" -gt "65535"; then
+  AC_MSG_ERROR([invalid --with-pgport specification: must be between 1 and 65535])
+fi
+
 #
 # '-rpath'-like feature can be disabled
 #
-- 
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