thumbnailer: Follow only one level of symbolic link.

[fvwmconf.git] / scripts / thumbnail.zsh

diff --git a/scripts/thumbnail.zsh b/scripts/thumbnail.zsh
index de5e44f30516a69dffe2b711f2723909e2f8c8d1..a27574931951d46f1c2dcce66cbdfee4ecd23fad 100755 (executable)
--- a/scripts/thumbnail.zsh
+++ b/scripts/thumbnail.zsh
@@ -1,6 +1,6 @@
 #!/usr/bin/env zsh
 #
-# Copyright © 2008 Nick Bowler
+# Copyright © 2008, 2017 Nick Bowler
 #
 # Simple thumbnail generator for use with FVWM.  Thumbnails can be generated at
 # any desired size, and are cached for future use.  Prints the cached filename
@@ -10,6 +10,22 @@
 # This is free software: you are free to do what the fuck you want to.
 # There is NO WARRANTY, to the extent permitted by law.
 
+# resolve_file [file]
+#
+# If the argument is a symbolic link, print the target of that link.
+# Otherwise, prints the basename of file.
+resolve_file () {
+  test $# -eq 1 || return
+
+  # Ensure filename won't be confused for any kind of find argument...
+  case $1 in
+  /*) :;;
+  *) set x "./$1"; shift
+  esac
+
+  find "$1" -prune \( -type l -printf '%l' -o -printf '%f' \)
+}
+
 if [[ -z "$MUSIC" ]]; then
        MUSIC=/home/music
 fi
@@ -60,8 +76,11 @@ else
 fi
 
 [[ ! -f "$imgpath" ]] && exit 0
-
-image="$(readlink -f -- "$imgpath")"
+image=`resolve_file "$imgpath"`
+case $image in
+/*) :;;
+*) image=`dirname $imgpath`/$image
+esac
 [[ ! -f "$image" ]] && exit 0
 
 thumb="$thumbs/$(echo -n $image | md5sum - | cut -d ' ' -f 1)_$size.png"