From cef48161fbf809b7ed2ba06af8b31d0e38e4e2fb Mon Sep 17 00:00:00 2001
From: Egor Tensin <Egor.Tensin@gmail.com>
Date: Sat, 15 Apr 2017 08:17:10 +0300
Subject: swap_files: not necessarily regular

---
 %HOME%/.bash_utils/file.sh | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/%HOME%/.bash_utils/file.sh b/%HOME%/.bash_utils/file.sh
index 33f9994..6034713 100644
--- a/%HOME%/.bash_utils/file.sh
+++ b/%HOME%/.bash_utils/file.sh
@@ -16,18 +16,21 @@ swap_files() (
     local path1="$1"
     local path2="$2"
 
-    if [ ! -f "$path1" ]; then
+    if [ ! -r "$path1" ] || [ ! -w "$path1" ]; then
         echo "${FUNCNAME[0]}: must be a regular file: $path1" >&2
         return 1
     fi
 
-    if [ ! -f "$path2" ]; then
+    if [ ! -r "$path2" ] || [ ! -w "$path2" ]; then
         echo "${FUNCNAME[0]}: must be a regular file: $path2" >&2
         return 1
     fi
 
+    local path1_dir
+    path1_dir="$( dirname -- "$path1" )"
+
     local tmp_path
-    tmp_path="$( mktemp -- "$( dirname -- "$path1" )/XXX" )"
+    tmp_path="$( mktemp -- "$path1_dir/XXX" )"
 
     mv -- "$path1" "$tmp_path"
     mv -- "$path2" "$path1"
-- 
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