From a517f900e434756d65b083fdfc744cf3c85ebb46 Mon Sep 17 00:00:00 2001
From: "Anthony J. Bentley" <anthony@anjbe.name>
Date: Fri, 30 Aug 2019 23:11:28 -0600
Subject: [PATCH] Use POSIX-compatible dd(1) instead of head -c.

---
 test/asm/test.sh         | 2 +-
 test/link/test.sh        | 2 +-
 test/link/update-refs.sh | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/test/asm/test.sh b/test/asm/test.sh
index da050652..23e4b7fe 100755
--- a/test/asm/test.sh
+++ b/test/asm/test.sh
@@ -18,7 +18,7 @@ for i in *.asm; do
 		bin=${i%.asm}.out.bin
 		if [ -f $bin ]; then
 			../../rgblink -o $gb $o > $after 2>&1
-			head -c $(wc -c < $bin) $gb > $after 2>&1
+			dd if=$gb count=1 bs=$(printf %s $(wc -c < $bin)) > $after 2>/dev/null
 			hexdump -C $after > $before && mv $before $after
 			hexdump -C $bin > $before
 			diff -u $before $after
diff --git a/test/link/test.sh b/test/link/test.sh
index df4812f2..609fee34 100755
--- a/test/link/test.sh
+++ b/test/link/test.sh
@@ -12,7 +12,7 @@ $RGBASM -o $otemp bank-numbers.asm
 $RGBLINK -o $gbtemp $otemp > $outtemp 2>&1
 diff bank-numbers.out $outtemp
 rc=$(($? || $rc))
-head -c 20 $gbtemp > $otemp 2>&1
+dd if=$gbtemp count=1 bs=20 > $otemp 2>/dev/null
 diff bank-numbers.out.bin $otemp
 rc=$(($? || $rc))
 
diff --git a/test/link/update-refs.sh b/test/link/update-refs.sh
index 6636d109..81cb3f2a 100755
--- a/test/link/update-refs.sh
+++ b/test/link/update-refs.sh
@@ -7,7 +7,7 @@ RGBLINK=../../rgblink
 
 $RGBASM -o $otemp bank-numbers.asm
 $RGBLINK -o $gbtemp $otemp > bank-numbers.out 2>&1
-head -c 20 $gbtemp > bank-numbers.out.bin 2>&1
+dd if=$gbtemp count=1 bs=20 > bank-numbers.out.bin 2>/dev/null
 
 $RGBASM -o $otemp section-attributes.asm
 $RGBLINK -l section-attributes.link \