postgresql-setup: work even if $PATH is unset or empty

.. by setting $PATH to default value.  Also check for command
existence by 'command' built-in instead of checking for file
existence.

Version: 9.3.4-2
Resolves: #1097317

postgresql-setup

@@ -2,6 +2,8 @@
 #
 # postgresql-setup - Initialization and upgrade operations for PostgreSQL
 
+test -z "$PATH" && export PATH="/sbin:/usr/sbin:/bin:/usr/bin"
+
 test x"$PGSETUP_DEBUG" != x && set -x
 
 # PGVERSION is the full package version, e.g., 9.0.2
@@ -100,7 +102,7 @@ export PGDATA
 export PGPORT
 
 # For SELinux we need to use 'runuser' not 'su'
-if [ -x /sbin/runuser ]; then
+if command -v runuser &>/dev/null; then
     SU=runuser
 else
     SU=su

postgresql.spec

@@ -64,7 +64,7 @@ Summary: PostgreSQL client programs
 Name: postgresql
 %global majorversion 9.3
 Version: 9.3.4
-Release: 1%{?dist}
+Release: 2%{?dist}
 
 # The PostgreSQL license is very similar to other MIT licenses, but the OSI
 # recognizes it as an independent license, so we do as well.
@@ -1131,6 +1131,9 @@ fi
 %endif
 
 %changelog
+* Wed May 14 2014 Pavel Raiskup <praiskup@redhat.com> - 9.3.4-2
+- set basic $PATH when it is empty or unset, (#1097317)
+
 * Thu Mar 20 2014 Jozef Mlich <jmlich@redhat.com> - 9.3.4-1
 - update to 9.3.4 minor version per release notes:
   http://www.postgresql.org/docs/9.3/static/release-9-3-4.html