terminate on missing file and return non-zero status code

to adhere to UNIX style

1 files changed, 4 insertions, 3 deletions

diff --git a/anondcim b/anondcim
index b968ff3..d3f2483 100755
--- a/anondcim
+++ b/anondcim
@@ -63,7 +63,6 @@ do
     # always use a padded number as destination filename suffix
     dst="$dst$file_prefix$(echo -n "0000000000$cur" | tail -c ${#total}).jpg"
     echo "anonymizing \"$fn\" to \"$dst\" ($cur/$total)"
-    [ -f "$fn" ] || { err "source \"$fn\" does not exist and is skipped"; continue; }
     [ -e "$dst" ] && { err "destination \"$dst\" for source \"$fn\" already exists, anonymization is skipped"; continue; }
     
     read w h << EOF
@@ -71,15 +70,17 @@ $(identify -format '%w %h' "$fn")
 EOF
     
     # resize and distort
-    if [ $w -ge 100 ] && [ $h -ge 100 ]; then
+    if [ $w -ge 100 -a $h -ge 100 ] 2>/dev/null; then
         if [ $w -ge 1000 ]; then dw=$(($w / 100)); else dw=10; fi
         if [ $h -ge 1000 ]; then dh=$(($h / 100)); else dh=10; fi
         w=$(($w - 1))
         h=$(($h - 1))
 	distort="-distort Perspective \"$(rand $dw) $(rand $dh) 0 0, $(($w - $(rand $dw))) $(rand $dh) $w 0, $(rand $dw) $(($h - $(rand $dh))) 0 $h, $(($w - $(rand $dw))) $(($h - $(rand $dh))) $w $h\""
-    else
+    elif [ $w -ge 0 -a $h -ge 0 ] 2>/dev/null; then
         err "image $fn is too small to be distorted and will just be filtered and resized"
 	distort=
+    else
+	die "failed to identify $fn"
     fi
     eval convert "$fn" \
         -colorspace RGB \