From f515160bd643c9e79426c08623b700ac0d22ae22 Mon Sep 17 00:00:00 2001
From: Von Random <von@mechanus.net>
Date: Wed, 18 Feb 2015 18:59:23 +0300
Subject: swap some string tests to math tests

---
 backup.zsh | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/backup.zsh b/backup.zsh
index 074d40d..6022da3 100755
--- a/backup.zsh
+++ b/backup.zsh
@@ -47,7 +47,7 @@ function apply_config
 			cfg_err 'remote_pass'
 			return 5
 		fi
-		if [[ -n $port && ! $port =~ ^[0-9]+$ ]]; then
+		if ! (( port )); then
 			err 'remote_port is not a numeric value.'
 			return 5
 		fi
@@ -64,8 +64,8 @@ function apply_config
 	# set defaults and / or fail to run if something is missing
 	local exit_code
 	case $protocol in
-		('ftp'|'ftps') port=${remote_port:-$default_ftp_port}; test_remote_settings; exit_code=$?; [[ $exit_code -ne 0 ]] && return $exit_code;;
-		('sftp'|'ssh') port=${remote_port:-$default_ssh_port}; test_remote_settings; exit_code=$?; [[ $exit_code -ne 0 ]] && return $exit_code;;
+		('ftp'|'ftps') port=${remote_port:-$default_ftp_port}; test_remote_settings; exit_code=$?; (( exit_code )) && return $exit_code;;
+		('sftp'|'ssh') port=${remote_port:-$default_ssh_port}; test_remote_settings; exit_code=$?; (( exit_code )) && return $exit_code;;
 		('local') unset remote_port;;
 		(*) cfg_err 'protocol'; return 5;;
 	esac
@@ -159,7 +159,7 @@ function main
 	apply_config
 	# fail in case something goes wrong
 	local exit_code=$?
-	[[ $exit_code -ne 0 ]] && return $exit_code
+	(( exit_code )) && return $exit_code
 	unset exit_code
 	# run backups per directory
 	for i in $source_dirs; do
-- 
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