### Proposal I think this patch will resolve the problem. Apparently neither `-psm` nor having `/dev/*` as file work for tesseract (and for that reason, `/dev/stdout` is not used either in the patch). I'm not certain what this script does though, so have a close look whether something breaks with the patch. The filename next to mktemp was removed because `mktemp` tried to create the tmpfile inside `/usr`, which will fail due to permissions. With no explicit specified naming scheme, the tempfile will end up in `/tmp`, which should work always. ### Problem The original script yielded these errors: ``` $ cat ~/pictures/Screenshot_20191005_160647.png |./get-text-orientation ./get-text-orientation: line 62: $tmpfile: ambiguous redirect read_params_file: Can't open 0 read_params_file: Can't open l read_params_file: Can't open osd Error, could not create TXT output file: Read-only file system ``` The patched version yields this: ``` $ cat pictures/Screenshot_20191005_160647.png | ./get-text-orientation Page number: 0 Orientation in degrees: 180 Rotate: 180 Orientation confidence: 0.66 Script: Japanese Script confidence: 0.85 ``` ### Patch ``` diff --git a/filters/get-text-orientation b/filters/get-text-orientation index 847f2c6..8d4b7f2 100755 --- a/filters/get-text-orientation +++ b/filters/get-text-orientation @@ -47,8 +47,8 @@ if test $? != 0; then exit 1 fi -tmpfile=$(mktemp -q .reorient.XXX) -trap "rm -f $tmpfile" 0 1 2 15 +tmpfile=$(mktemp -q) +trap "rm -f $tmpfile ${tmpfile}.osd" 0 1 2 15 case "$engine" in */tesseract|tesseract) @@ -66,7 +66,8 @@ case "$engine" in # about ends up on standard error, but our caller looks # for it on standard output. Redirect to handle that. - $engine $tmpfile /dev/null -psm 0 -l osd 2>&1 + $engine $tmpfile $tmpfile --psm 0 -l osd 2> /dev/null + cat ${tmpfile}.osd ;; */ocr-engine-getrotate) ```