emulate truncate with head -c 0

src/safe_fastqc.sh

@@ -26,13 +26,13 @@ odir=${5}
 fastqc --nogroup -o ${odir} ${input_r1} ${input_r2}
 
 if [[ -f ${output_r1} ]]; then
-    unzip -l ${output_r1} || truncate -s0 ${output_r1}
+    unzip -l ${output_r1} || head -c 0 ${output_r1} > ${output_r1}
 else
     touch ${output_r1}
 fi
 
 if [[ -f ${output_r2} ]]; then
-    unzip -l ${output_r2} || truncate -s0 ${output_r2}
+    unzip -l ${output_r2} || head -c 0 ${output_r2} > ${output_r2}
 else
     touch ${output_r2}
 fi