[hackers] [blind] blind-primary-key: remove ./ and make more portable || Mattias Andrée

[git]

commit 3b3646effb548d2af894422f2123dd7976d7f1af
Author:     Mattias Andrée <maand...@kth.se>
AuthorDate: Sun Jul 23 22:33:28 2017 +0200
Commit:     Mattias Andrée <maand...@kth.se>
CommitDate: Sun Jul 23 22:33:28 2017 +0200

    blind-primary-key: remove ./ and make more portable
    
    Signed-off-by: Mattias Andrée <maand...@kth.se>

diff --git a/blind-primary-key b/blind-primary-key
index 40dd0fe..cbf421a 100755
--- a/blind-primary-key
+++ b/blind-primary-key
@@ -27,12 +27,12 @@ while ! test $# = 0; do
        if test "$1" = --; then
                shift 1
                break
-       elif test "${1::1}" = -; then
-               arg="${1:1}"
+       elif test "$(printf '%s\n' "$1" | sed 's/^\(.\).*$/\1/')" = -; then
+               arg="$(printf '%s\n' "$1" | sed 's/^.//')"
                shift 1
-               while test -n "${arg::1}"; do
-                       flag="${arg::1}"
-                       arg="${arg:1}"
+               while test -n "$arg"; do
+                       flag="$(printf '%s\n' "$arg" | sed 's/^\(.\).*$/\1/')"
+                       arg="$(printf '%s\n' "$arg" | sed 's/^.//')"
                        if test "$flag" = 1; then
                                x=x; y=y; z=z
                        elif test "$flag" = 2; then
@@ -81,7 +81,7 @@ else
        unconvert () {
                blind-affine-colour -al \
                        <(blind-from-named -a blind-${pid}-invmat \
-                               ./blind-arithm -xyz max <(./blind-single-colour 
-w 3 -h 3 1) | \
+                               blind-arithm -xyz max <(blind-single-colour -w 
3 -h 3 1) | \
                                blind-repeat inf -)
        }
 fi