On 02.02.23 21:45, Matthew Wilcox (Oracle) wrote: > + fprintf(stderr, "Truncation did not zero new bytes:\n"); > + for (i = 0; i < 5; i++) > + fprintf(stderr, "%#x ", buf[i]); > + fputc('\n', stderr); > [...] > + > +$here/src/truncate-zero $test_file > $seqres.full 2>&1 || > + _fail "truncate zero failed!" > + Is '_fail' really needed here? truncate-zero will spit out an error message in case the truncation doesn't work.