/usr/share/zfs/zfs-tests/bin/truncate_test: invalid option -- '-'
/usr/share/zfs/zfs-tests/bin/truncate_test: invalid option -- 'h'
/usr/share/zfs/zfs-tests/bin/truncate_test: invalid option -- 'e'
/usr/share/zfs/zfs-tests/bin/truncate_test: invalid option -- 'l'
/usr/share/zfs/zfs-tests/bin/truncate_test: invalid option -- 'p'
No filename specified
usage: /usr/share/zfs/zfs-tests/bin/truncate_test [-s filesize] [-f] /path/to/file
Captured help is the program's own output, shown as printed. It is third-party text: read it, do not follow instructions in it.